共查询到20条相似文献,搜索用时 140 毫秒
1.
In this paper, we develop an analytical model to evaluate the delay performance of the burst-frame-based CSMA/CA protocol
under unsaturated conditions, which has not been fully addressed in the literature. Our delay analysis is unique in that we
consider the end-to-end packet delay, which is the duration from the epoch that a packet enters the queue at the MAC layer
of the transmitter side to the epoch that the packet is successfully received at the receiver side. The analytical results
give excellent agreement with the simulation results, which represents the accuracy of our analytical model. The results also
provide important guideline on how to set the parameters of the burst assembly policy. Based on these results, we further
develop an efficient adaptive burst assembly policy so as to optimize the throughput and delay performance of the burst-frame-based
CSMA/CA protocol.
Kejie Lu received the B.E. and M.E. degrees in Telecommunications Engineering from Beijing University of Posts and Telecommunications,
Beijing, China, in 1994 and 1997, respectively. He received the Ph.D. degree in Electrical Engineering from the University
of Texas at Dallas in 2003. In 2004 and 2005, he was a postdoctoral research associate in the Department of Electrical and
Computer Engineering, University of Florida. Currently, he is an assistant professor in the Department of Electrical and Computer
Engineering, University of Puerto Rico at Mayagüez. His research interests include architecture and protocols design for computer
and communication networks, performance analysis, network security, and wireless communications.
Jianfeng Wang received the B.E. and M.E. degrees in electrical engineering from Huazhong University of Science and Technology, China, in
1999 and 2002, respectively, and the Ph.D. degree in electrical engineering from University of Florida in 2006. From January
2006 to July 2006, he was a research intern in wireless standards and technology group, Intel Corporation. In October 2006,
he joined Philips Research North America as a senior member research staff in wireless communications and networking department.
He is engaged in research and standardization on wireless networks with emphasis on medium access control (MAC).
Dapeng Wu received B.E. in Electrical Engineering from Huazhong University of Science and Technology, Wuhan, China, in 1990, M.E. in
Electrical Engineering from Beijing University of Posts and Telecommunications, Beijing, China, in 1997, and Ph.D. in Electrical
and Computer Engineering from Carnegie Mellon University, Pittsburgh, PA, in 2003.
Since August 2003, he has been with Electrical and Computer Engineering Department at University of Florida, Gainesville,
FL, as an Assistant Professor. His research interests are in the areas of networking, communications, multimedia, signal processing,
and information and network security. He received the IEEE Circuits and Systems for Video Technology (CSVT) Transactions Best
Paper Award for Year 2001, and the Best Paper Award in International Conference on Quality of Service in Heterogeneous Wired/Wireless
Networks (QShine) 2006.
Currently, he serves as the Editor-in-Chief of Journal of Advances in Multimedia, and an Associate Editor for IEEE Transactions
on Wireless Communications, IEEE Transactions on Circuits and Systems for Video Technology, IEEE Transactions on Vehicular
Technology, and International Journal of Ad Hoc and Ubiquitous Computing. He is also a guest-editor for IEEE Journal on Selected
Areas in Communications (JSAC), Special Issue on Cross-layer Optimized Wireless Multimedia Communications. He served as Program
Chair for IEEE/ACM First International Workshop on Broadband Wireless Services and Applications (BroadWISE 2004); and as a
technical program committee member of over 30 conferences. He is Vice Chair of Mobile and wireless multimedia Interest Group
(MobIG), Technical Committee on Multimedia Communications, IEEE Communications Society. He is a member of the Best Paper Award
Committee, Technical Committee on Multimedia Communications, IEEE Communications Society.
Yuguang Fang received a Ph.D. degree in Systems Engineering from Case Western Reserve University in January 1994 and a Ph.D. degree in
Electrical Engineering from Boston University in May 1997. He was an assistant professor in the Department of Electrical and
Computer Engineering at New Jersey Institute of Technology from July 1998 to May 2000. He then joined the Department of Electrical
and Computer Engineering at University of Florida in May 2000 as an assistant professor and got an early promotion to an associate
professor with tenure in August 2003 and to a full professor in August 2005. He has published over 200 papers in refereed
professional journals and conferences. He received the National Science Foundation Faculty Early Career Award in 2001 and
the Office of Naval Research Young Investigator Award in 2002. He has served on several editorial boards of technical journals
including IEEE Transactions on Communications, IEEE Transactions on Wireless Communications, IEEE Transactions on Mobile Computing
and ACM Wireless Networks. He have also been actively participating in professional conference organizations such as serving
as The Steering Committee Co-Chair for QShine, the Technical Program Vice-Chair for IEEE INFOCOM’2005, Technical Program Symposium
Co-Chair for IEEE Globecom’2004, and a member of Technical Program Committee for IEEE INFOCOM (1998, 2000, 2003–2007). He
is a senior member of the IEEE. 相似文献
2.
The proper functioning of mobile ad hoc networks depends on the hypothesis that each individual node is ready to forward packets
for others. This common assumption, however, might be undermined by the existence of selfish users who are reluctant to act
as packet relays in order to save their own resources. Such non-cooperative behavior would cause the sharp degradation of
network throughput. To address this problem, we propose a credit-based Secure Incentive Protocol (SIP) to stimulate cooperation
among mobile nodes with individual interests. SIP can be implemented in a fully distributed way and does not require any pre-deployed
infrastructure. In addition, SIP is immune to a wide range of attacks and is of low communication overhead by using a Bloom
filter. Detailed simulation studies have confirmed the efficacy and efficiency of SIP.
This work was supported in part by the U.S. Office of Naval Research under Young Investigator Award N000140210464 and under
grant N000140210554.
Yanchao Zhang
received the B.E. degree in Computer Communications from Nanjing University of Posts and Telecommunications, Nanjing, China,
in July 1999, and the M.E. degree in Computer Applications from Beijing University of Posts and Telecommunications, Beijing,
China, in April 2002. Since September 2002, he has been working towards the Ph.D. degree in the Department of Electrical and
Computer Engineering at the University of Florida, Gainesville, Florida, USA. His research interests are network and distributed
system security, wireless networking, and mobile computing, with emphasis on mobile ad hoc networks, wireless sensor networks,
wireless mesh networks, and heterogeneous wired/wireless networks.
Wenjing Lou
is an assistant professor in the Electrical and Computer Engineering department at Worcester Polytechnic Institute. She obtained
her Ph.D degree in Electrical and Computer Engineering from University of Florida in 2003. She received the M.A.Sc degree
from Nanyang Technological University, Singapore, in 1998, the M.E degree and the B.E degree in Computer Science and Engineering
from Xi'an Jiaotong University, China, in 1996 and 1993 respectively. From Dec 1997 to Jul 1999, she worked as a Research
Engineer in Network Technology Research Center, Nanyang Technological University. Her current research interests are in the
areas of ad hoc and sensor networks, with emphases on network security and routing issues.
Wei Liu
received his B.E. and M.E. in Electrical and Information Engineering from Huazhong University of Science and Technology, Wuhan,
China, in 1998 and 2001. In August 2005, he received his PhD in Electrical and Computer Engineering from University of Florida.
Currently, he is a senior technical member with Scalable Network Technologies. His research interest includes cross-layer
design, and communication protocols for mobile ad hoc networks, wireless sensor networks and cellular networks.
Yuguang Fang
received a Ph.D. degree in Systems Engineering from Case Western Reserve University in January 1994 and a Ph.D degree in Electrical
Engineering from Boston University in May 1997. He was an assistant professor in the Department of Electrical and Computer
Engineering at New Jersey Institute of Technology from July 1998 to May 2000. He then joined the Department of Electrical
and Computer Engineering at University of Florida in May 2000 as an assistant professor, got an early promotion to an associate
professor with tenure in August 2003 and a professor in August 2005. He has published over 150 papers in refereed professional
journals and conferences. He received the National Science Foundation Faculty Early Career Award in 2001 and the Office of
Naval Research Young Investigator Award in 2002. He has served on many editorial boards of technical journals including IEEE
Transactions on Communications, IEEE Transactions on Wireless Communications, IEEE Transactions on Mobile Computing and ACM
Wireless Networks. He is a senior member of the IEEE. 相似文献
3.
In this paper, we investigate the routing optimization problem in wireless mesh networks. While existing works usually assume
static and known traffic demand, we emphasize that the actual traffic is time-varying and difficult to measure. In light of
this, we alternatively pursue a stochastic optimization framework where the expected network utility is maximized. For multi-path
routing scenario, we propose a stochastic programming approach which requires no priori knowledge on the probabilistic distribution
of the traffic. For the single-path routing counterpart, we develop a learning-based algorithm which provably converges to
the global optimum solution asymptotically.
Yang Song received his B.E. and M.E. degrees in Electrical Engineering from Dalian University of Technology, Dalian, China, and University of Hawaii at Manoa, Honolulu, U.S.A., in July 2004 and August 2006, respectively. Since September 2006, he has been working towards the Ph.D. degree in the Department of Electrical and Computer Engineering at the University of Florida, Gainesville, Florida, USA. His research interests are wireless network, game theory, optimization and mechanism design. He is a student member of IEEE a member of Game Theory Society. Chi Zhang received the B.E. and M.E. degrees in Electrical Engineering from Huazhong University of Science and Technology, Wuhan, China, in July 1999 and January 2002, respectively. Since September 2004, he has been working towards the Ph.D. degree in the Department of Electrical and Computer Engineering at the University of Florida, Gainesville, Florida, USA. His research interests are network and distributed system security, wireless networking, and mobile computing, with emphasis on mobile ad hoc networks, wireless sensor networks, wireless mesh networks, and heterogeneous wired/wireless networks. Yuguang Fang received a Ph.D. degree in Systems Engineering from Case Western Reserve University in January 1994 and a Ph.D degree in Electrical Engineering from Boston University in May 1997. He was an assistant professor in the Department of Electrical and Computer Engineering at New Jersey Institute of Technology from July 1998 to May 2000. He then joined the Department of Electrical and Computer Engineering at University of Florida in May 2000 as an assistant professor, got an early promotion to an associate professor with tenure in August 2003 and to a full professor in August 2005. He holds a University of Florida Research Foundation (UFRF) Professorship from 2006 to 2009 and a Changjiang Scholar Chair Professorship with National Key Laboratory of Integrated Services Networks, Xidian University, China, from 2008 to 2011. He has published over 200 papers in refereed professional journals and conferences. He received the National Science Foundation Faculty Early Career Award in 2001 and the Office of Naval Research Young Investigator Award in 2002. He is the recipient of the Best Paper Award in IEEE International Conference on Network Protocols (ICNP) in 2006 and the recipient of the IEEE TCGN Best Paper Award in the IEEE High-Speed Networks Symposium, IEEE Globecom in 2002. Dr. Fang is also active in professional activities. He is a Fellow of IEEE and a member of ACM. He has served on several editorial boards of technical journals including IEEE Transactions on Communications, IEEE Transactions on Wireless Communications, IEEE Transactions on Mobile Computing and ACM Wireless Networks. He has been actively participating in professional conference organizations such as serving as the Steering Committee Co-Chair for QShine, the Technical Program Vice-Chair for IEEE INFOCOM’2005, Technical Program Symposium Co-Chair for IEEE Globecom’2004, and a member of Technical Program Committee for IEEE INFOCOM (1998, 2000, 2003–2009). 相似文献
Yuguang FangEmail: |
Yang Song received his B.E. and M.E. degrees in Electrical Engineering from Dalian University of Technology, Dalian, China, and University of Hawaii at Manoa, Honolulu, U.S.A., in July 2004 and August 2006, respectively. Since September 2006, he has been working towards the Ph.D. degree in the Department of Electrical and Computer Engineering at the University of Florida, Gainesville, Florida, USA. His research interests are wireless network, game theory, optimization and mechanism design. He is a student member of IEEE a member of Game Theory Society. Chi Zhang received the B.E. and M.E. degrees in Electrical Engineering from Huazhong University of Science and Technology, Wuhan, China, in July 1999 and January 2002, respectively. Since September 2004, he has been working towards the Ph.D. degree in the Department of Electrical and Computer Engineering at the University of Florida, Gainesville, Florida, USA. His research interests are network and distributed system security, wireless networking, and mobile computing, with emphasis on mobile ad hoc networks, wireless sensor networks, wireless mesh networks, and heterogeneous wired/wireless networks. Yuguang Fang received a Ph.D. degree in Systems Engineering from Case Western Reserve University in January 1994 and a Ph.D degree in Electrical Engineering from Boston University in May 1997. He was an assistant professor in the Department of Electrical and Computer Engineering at New Jersey Institute of Technology from July 1998 to May 2000. He then joined the Department of Electrical and Computer Engineering at University of Florida in May 2000 as an assistant professor, got an early promotion to an associate professor with tenure in August 2003 and to a full professor in August 2005. He holds a University of Florida Research Foundation (UFRF) Professorship from 2006 to 2009 and a Changjiang Scholar Chair Professorship with National Key Laboratory of Integrated Services Networks, Xidian University, China, from 2008 to 2011. He has published over 200 papers in refereed professional journals and conferences. He received the National Science Foundation Faculty Early Career Award in 2001 and the Office of Naval Research Young Investigator Award in 2002. He is the recipient of the Best Paper Award in IEEE International Conference on Network Protocols (ICNP) in 2006 and the recipient of the IEEE TCGN Best Paper Award in the IEEE High-Speed Networks Symposium, IEEE Globecom in 2002. Dr. Fang is also active in professional activities. He is a Fellow of IEEE and a member of ACM. He has served on several editorial boards of technical journals including IEEE Transactions on Communications, IEEE Transactions on Wireless Communications, IEEE Transactions on Mobile Computing and ACM Wireless Networks. He has been actively participating in professional conference organizations such as serving as the Steering Committee Co-Chair for QShine, the Technical Program Vice-Chair for IEEE INFOCOM’2005, Technical Program Symposium Co-Chair for IEEE Globecom’2004, and a member of Technical Program Committee for IEEE INFOCOM (1998, 2000, 2003–2009). 相似文献
4.
In order to support the diverse Quality of Service (QoS) requirements for differentiated data applications in broadband wireless
networks, advanced techniques such as space-time coding (STC) and orthogonal frequency division multiplexing (OFDM) are implemented
at the physical layer. However, the employment of such techniques evidently affects the subchannel-allocation algorithms at
the medium access control (MAC) layer. In this paper, we propose the QoS-driven cross-layer subchannel-allocation algorithms
for data transmissions over asynchronous uplink space-time OFDM-CDMA wireless networks. We mainly focus on QoS requirements
of maximizing the best-effort throughput and proportional bandwidth fairness, while minimizing the upper-bound of scheduling
delay. Our extensive simulations show that the proposed infrastructure and algorithms can achieve high bandwidth fairness
and system throughput while reducing scheduling delay over wireless networks.
Xi Zhang (S’89-SM’98) received the B.S. and M.S. degrees from Xidian University, Xi’an, China, the M.S. degree from Lehigh University,
Bethlehem, PA, all in electrical engineering and computer science, and the Ph.D. degree in electrical engineering and computer
science (Electrical Engineering—Systems) from The University of Michigan, Ann Arbor, USA.
He is currently an Assistant Professor and the Founding Director of the Networking and Information Systems Laboratory, Department
of Electrical and Computer Engineering, Texas A&M University, College Station, Texas, USA. He was an Assistant Professor and
the Founding Director of the Division of Computer Systems Engineering, Department of Electrical Engineering and Computer Science,
Beijing Information Technology Engineering Institute, Beijing, China, from 1984 to 1989. He was a Research Fellow with the
School of Electrical Engineering, University of Technology, Sydney, Australia, and the Department of Electrical and Computer
Engineering, James Cook University, Queensland, Australia, under a Fellowship from the Chinese National Commission of Education.
He worked as a Summer Intern with the Networks and Distributed Systems Research Department, Bell Laboratories, Murray Hills,
NJ, and with AT&T Laboratories Research, Florham Park, NJ, in 1997. He has published more than 80 technical papers. His current
research interests focus on the areas of wireless networks and communications, mobile computing, cross-layer designs and optimizations
for QoS guarantees over mobile wireless networks, wireless sensor and Ad Hoc networks, wireless and wireline network security,
network protocols design and modeling for QoS guarantees over multicast (and unicast) wireless (and wireline) networks, statistical
communications theory, random signal processing, and distributed computer-control systems.
Dr. Zhang received the U.S. National Science Foundation CAREER Award in 2004 for his research in the areas of mobile wireless
and multicast networking and systems. He is currently serving as an Editor for the IEEE Transactions on Wireless Communications,
an Associated Editor for the IEEE Transactions on Vehicular Technology, and and Associated Editor for the IEEE Communications
Letters, and is also currently serving as a Guest Editor for the IEEE Wireless Communications Magazine for the Special Issues
of “Next Generation of CDMA vs. OFDMA for 4G Wireless Applications”. He has served or is serving as the Panelist on the U.S.
National Science Foundation Research-Proposal Review Panel in 2004, the WiFi-Hotspots/WLAN and QoS Panelist at the IEEE QShine
2004, as the Symposium Chair for the IEEE International Cross-Layer Designs and Protocols Symposium within the IEEE International
Wireless Communications and Mobile Computing Conference (IWCMC) 2006, the Technical Program Committee Co-Chair for the IEEE
IWCMC 2006, the Poster Chair for the IEEE QShine 2006, the Publicity Co-Chair for the IEEE WirelessCom 2005, and as the Technical
Program Committee members for IEEE GLOBECOM, IEEE ICC, IEEE WCNC, IEEE VTC, IEEE QShine, IEEE WoWMoM, IEEE WirelessCom, and
IEEE EIT. He is a Senior Member of the IEEE and a member of the Association for Computing Machinery (ACM).
Jia Tang (S’03) received the B.S. degree in electrical engineering from Xi’an Jiaotong University, Xi’an, China, in 2001. He is currently
a Research Assistant working towards the Ph.D. degree in the Networking and Information Systems Laboratory, Department of
Electrical and Computer Engineering, Texas A&M University, College Station, Texas, USA. His research interests include mobile
wireless communications and networks, with emphasis on cross-layer design and optimizations, wireless quality-of-service (QoS)
provisioning for mobile multimedia networks, wireless diversity techniques, and wireless resource allocation.
Mr. Tang received the Fouraker Graduate Research Fellowship Award from the Department of Electrical and Computer Engineering,
Texas A&M University in 2005. 相似文献
5.
We propose an innovative resource management scheme for TDMA based mobile ad hoc networks. Since communications between some
important nodes in the network are more critical, they should be accepted by the network with high priority in terms of network
resource usage and quality of service (QoS) support. In this scheme, we design a location-aware bandwidth pre-reservation
mechanism, which takes advantage of each mobile node’s geographic location information to pre-reserve bandwidth for such high
priority connections and thus greatly reduces potential scheduling conflicts for transmissions. In addition, an end-to-end
bandwidth calculation and reservation algorithm is proposed to make use of the pre-reserved bandwidth. In this way, time slot
collisions among different connections and in adjacent wireless links along a connection can be reduced so that more high
priority connections can be accepted into the network without seriously hurting admissions of other connections. The salient
feature of our scheme is the collaboration between the routing and MAC layer that results in the more efficient spatial reuse
of limited resources, which demonstrates how cross-layer design leads to better performance in QoS support. Extensive simulations
show that our scheme can successfully provide better communication quality to important nodes at a relatively low price. Finally,
several design issues and future work are discussed.
Xiang Chen received the B.E. and M.E. degrees in electrical engineering from Shanghai Jiao Tong University, Shanghai, China, in 1997
and 2000, respectively. Afterwards, he worked as a MTS (member of technical staff) in Bell Laboratories, Beijing, China. He
is currently working toward the Ph.D. degree in the department of Electrical and Computer Engineering at the University of
Florida. His research is focused on protocol design and performance evaluation in wireless networks, including cellular networks,
wireless LANs, and mobile ad hoc networks. He is a member of Tau Beta Pi and a student member of IEEE.
Wei Liu received the BE and ME degrees in electrical engineering from Huazhong University of Science and Technology, Wuhan, China,
in 1998 and 2001, respectively. He is currently pursuing the P.hD. degree in the Department of Electrical and Computer Engineering,
University of Florida, Gainesville, where he is a research assistant in the Wireless Networks Laboratory (WINET). His research
interest includes QoS, secure and power efficient routing, and MAC protocols in mobile ad hoc networks and sensor networks.
He is a student member of the IEEE.
Hongqiang Zhai received the B.E. and M.E. degrees in electrical engineering from Tsinghua University, Beijing, China, in July 1999 and January
2002 respectively. He worked as a research intern in Bell Labs Research China from June 2001 to December 2001, and in Microsoft
Research Asia from January 2002 to July 2002. Currently he is pursuing the Ph.D. degree in the Department of Electrical and
Computer Engineering, University of Florida. He is a student member of IEEE.
Yuguang Fang received a Ph.D. degree in Systems and Control Engineering from Case Western Reserve University in January 1994, and a Ph.D.
degree in Electrical Engineering from Boston University in May 1997. From June 1997 to July 1998, he was a Visiting Assistant
Professor in Department of Electrical Engineering at the University of Texas at Dallas. From July 1998 to May 2000, he was
an Assistant Professor in the Department of Electrical and Computer Engineering at New Jersey Institute of Technology. In
May 2000, he joined the Department of Electrical and Computer Engineering at University of Florida where he got the early
promotion to Associate Professor with tenure in August 2003 and to Full Professor in August 2005. He has published over 180
papers in refereed professional journals and conferences. He received the National Science Foundation Faculty Early Career
Award in 2001 and the Office of Naval Research Young Investigator Award in 2002. He is currently serving as an Editor for
many journals including IEEE Transactions on Communications, IEEE Transactions on Wireless Communications, IEEETransactions
on Mobile Computing, and ACM Wireless Networks. He is also actively participating in conference organization such as the Program
Vice-Chair for IEEE INFOCOM’2005, Program Co-Chair for the Global Internet and Next Generation Networks Symposium in IEEE
Globecom’2004 and the Program Vice Chair for 2000 IEEE Wireless Communications and Networking Conference (WCNC’2000). 相似文献
6.
Connected coverage, which reflects how well a target field is monitored under the base station, is the most important performance
metric used to measure the quality of surveillance that wireless sensor networks (WSNs) can provide. To facilitate the measurement
of this metric, we propose two novel algorithms for individual sensor nodes to identify whether they are on the coverage boundary,
i.e., the boundary of a coverage hole or network partition. Our algorithms are based on two novel computational geometric
techniques called localized Voronoi and neighbor embracing polygons. Compared to previous work, our algorithms can be applied
to WSNs of arbitrary topologies. The algorithms are fully distributed in the sense that only the minimal position information
of one-hop neighbors and a limited number of simple local computations are needed, and thus are of high scalability and energy
efficiency. We show the correctness and efficiency of our algorithms by theoretical proofs and extensive simulations.
Chi Zhang received the B.E. and M.E. degrees in Electrical Engineering from Huazhong University of Science and Technology, Wuhan, China,
in July 1999 and January 2002, respectively. Since September 2004, he has been working towards the Ph.D. degree in the Department
of Electrical and Computer Engineering at the University of Florida, Gainesville, Florida, USA. His research interests are
network and distributed system security, wireless networking, and mobile computing, with emphasis on mobile ad hoc networks,
wireless sensor networks, wireless mesh networks, and heterogeneous wired/wireless networks.
Yanchao Zhang received the B.E. degree in computer communications from Nanjing University of Posts and Telecommunications, Nanjing, China,
in July 1999, the M.E. degree in computer applications from Beijing University of Posts and Telecommunications, Beijing, China,
in April 2002, and the Ph.D. degree in electrical and computer engineering from the University of Florida, Gainesville, in
August 2006. Since September 2006, he has been an Assistant Professor in the Department of Electrical and Computer Engineering,
New Jersey Institute of Technology, Newark. His research interest include wireless and Internet security, wireless networking,
and mobile computing. He is a member of the IEEE and ACM.
Yuguang Fang received the BS and MS degrees in Mathematics from Qufu Normal University, Qufu, Shandong, China, in 1984 and 1987, respectively,
a Ph.D. degree in Systems and Control Engineering from Department of Systems, Control and Industrial Engineering at Case Western
Reserve University, Cleveland, Ohio, in January 1994, and a Ph.D. degree in Electrical Engineering from Department of Electrical
and Computer Engineering at Boston University, Massachusetts, in May 1997.
From 1987 to 1988, he held research and teaching position in both Department of Mathematics and the Institute of Automation
at Qufu Normal University. From September 1989 to December 1993, he was a teaching/research assistant in Department of Systems,
Control and Industrial Engineering at Case Western Reserve University, where he held a research associate position from January
1994 to May 1994. He held a post-doctoral position in Department of Electrical and Computer Engineering at Boston University
from June 1994 to August 1995. From September 1995 to May 1997, he was a research assistant in Department of Electrical and
Computer Engineering at Boston University. From June 1997 to July 1998, he was a Visiting Assistant Professor in Department
of Electrical Engineering at the University of Texas at Dallas. From July 1998 to May 2000, he was an Assistant Professor
in the Department of Electrical and Computer Engineering at New Jersey Institute of Technology, Newark, New Jersey. In May
2000, he joined the Department of Electrical and Computer Engineering at University of Florida, Gainesville, Florida, where
he got early promotion to Associate Professor with tenure in August 2003, and to Full Professor in August 2005. His research
interests span many areas including wireless networks, mobile computing, mobile communications, wireless security, automatic
control, and neural networks. He has published over one hundred and fifty (150) papers in refereed professional journals and
conferences. He received the National Science Foundation Faculty Early Career Award in 2001 and the Office of Naval Research
Young Investigator Award in 2002. He also received the 2001 CAST Academic Award. He is listed in Marquis Who’s Who in Science
and Engineering, Who’s Who in America and Who’s Who in World.
Dr. Fang has actively engaged in many professional activities. He is a senior member of the IEEE and a member of the ACM.
He is an Editor for IEEE Transactions on Communications, an Editor for IEEE Transactions on Wireless Communications, an Editor
for IEEE Transactions on Mobile Computing, an Editor for ACM Wireless Networks, and an Editor for IEEE Wireless Communications.
He was an Editor for IEEE Journal on Selected Areas in Communications:Wireless Communications Series, an Area Editor for ACM
Mobile Computing and Communications Review, an Editor for Wiley International Journal on Wireless Communications and Mobile
Computing, and Feature Editor for Scanning the Literature in IEEE Personal Communications. He has also actively involved with
many professional conferences such as ACM MobiCom’02 (Committee Co-Chair for Student Travel Award), MobiCom’01, IEEE INFOCOM’06,
INFOCOM’05 (Vice-Chair for Technical Program Committee), INFOCOM’04, INFOCOM’03, INFOCOM’00, INFOCOM’98, IEEE WCNC’04, WCNC’02,
WCNC’00 Technical Program Vice-Chair), WCNC’99, IEEE Globecom’04 (Symposium Co-Chair), Globecom’02, and International Conference
on Computer Communications and Networking (IC3N) (Technical Program Vice-Chair). 相似文献
7.
Cooperative-diversity slotted ALOHA 总被引:1,自引:0,他引:1
We propose a cooperative-diversity technique for ad hoc networks based on the decode-and-forward relaying strategy. We develop
a MAC protocol based on slotted ALOHA that allows neighbors of a transmitter to act as relays and forward a packet toward
its final destination when the transmission to the intended recipient fails. The proposed technique provides additional robustness
against fading, packet collisions and radio mobility. Network simulations confirm that under heavy traffic conditions, in
which every radio always has packets to send, the proposed cooperative-diversity slotted-ALOHA protocol can provide a higher
one-hop and end-to-end throughput than the standard slotted-ALOHA protocol can. A similar advantage in end-to-end delay can
be obtained when the traffic is light. As a result, the proposed cooperative-diversity ALOHA protocol can be used to improve
these measures of Quality of Service (QoS) in ad hoc wireless networks.
John M. Shea (S’92–M’99) received the B.S. (with highest honors) in Computer Engineering from Clemson University in 1993 and the M.S.
and Ph.D. degrees in electrical engineering from Clemson University in 1995 and 1998, respectively.
Dr. Shea is currently an Associate Professor of electrical and computer engineering at the University of Florida. Prior to
that, he was an Assistant Professor at the University of Florida from July 1999 to August 2005 and a post-doctoral research
fellow at Clemson University from January 1999 to August 1999. He was a research assistant in the Wireless Communications
Program at Clemson University from 1993 to 1998. He is currently engaged in research on wireless communications with emphasis
on error-control coding, cross-layer protocol design, cooperative diversity techniques, and hybrid ARQ.
Dr. Shea was selected as a Finalist for the 2004 Eta Kappa Nu Outstanding Young Electrical Engineer Award. He received the
Ellersick Award from the IEEE Communications Society in 1996. Dr. Shea was a National Science Foundation Fellow from 1994
to 1998. He is an Associate Editor for the IEEE Transactions on Vehicular Technology.
Tan F. Wong received the B.Sc. degree (1st class honors) in electronic engineering from the Chinese University of Hong Kong in 1991,
and the M.S.E.E. and Ph.D. degrees in electrical engineering from Purdue University in 1992 and 1997, respectively. He was
a research engineer working on the high speed wireless networks project in the Department of Electronics at Macquarie University,
Sydney, Australia. He also served as a post-doctoral research associate in the School of Electrical and Computer Engineering
at Purdue University. Since August 1998 he has been with the University of Florida, where he is currently an associate professor
of electrical and computer engineering. He serves as Editor for Wideband and Multiple Access Wireless Systems for the IEEE
Transactions on Communications and as the Editor for the IEEE Transactions on Vehicular Technology. 相似文献
8.
Quality of service (QoS) support for multimedia services in the IEEE 802.11 wireless LAN is an important issue for such WLANs
to become a viable wireless access to the Internet. In this paper, we endeavor to propose a practical scheme to achieve this
goal without changing the channel access mechanism. To this end, a novel call admission and rate control (CARC) scheme is
proposed. The key idea of this scheme is to regulate the arriving traffic of the WLAN such that the network can work at an
optimal point. We first show that the channel busyness ratio is a good indicator of the network status in the sense that it
is easy to obtain and can accurately and timely represent channel utilization. Then we propose two algorithms based on the
channel busyness ratio. The call admission control algorithm is used to regulate the admission of real-time or streaming traffic
and the rate control algorithm to control the transmission rate of best effort traffic. As a result, the real-time or streaming
traffic is supported with statistical QoS guarantees and the best effort traffic can fully utilize the residual channel capacity
left by the real-time and streaming traffic. In addition, the rate control algorithm itself provides a solution that could
be used above the media access mechanism to approach the maximal theoretical channel utilization. A comprehensive simulation
study in ns-2 has verified the performance of our proposed CARC scheme, showing that the original 802.11 DCF protocol can
statically support strict QoS requirements, such as those required by voice over IP or streaming video, and at the same time,
achieve a high channel utilization.
Hongqiang Zhai received the B.E. and M.E. degrees in electrical engineering from Tsinghua University, Beijing, China, in July 1999 and January
2002 respectively. He worked as a research intern in Bell Labs Research China from June 2001 to December 2001, and in Microsoft
Research Asia from January 2002 to July 2002. Currently he is pursuing the PhD degree in the Department of Electrical and
Computer Engineering, University of Florida. He is a student member of IEEE.
Xiang Chen received the B.E. and M.E. degrees in electrical engineering from Shanghai Jiao Tong University, Shanghai, China, in 1997
and 2000, respectively, and the Ph.D. degree in electrical and computer engineering from the University of Florida, Gainesville,
in 2005. He is currently a Senior Research Engineer at Motorola Labs, Arlington Heights, IL. His research interests include
resource management, medium access control, and quality of service (QoS) in wireless networks. He is a Member of Tau Beta
Pi and a student member of IEEE.
Yuguang Fang received a Ph.D degree in Systems and Control Engineering from Case Western Reserve University in January 1994, and a Ph.D
degree in Electrical Engineering from Boston University in May 1997.
From June 1997 to July 1998, he was a Visiting Assistant Professor in Department of Electrical Engineering at the University
of Texas at Dallas. From July 1998 to May 2000, he was an Assistant Professor in the Department of Electrical and Computer
Engineering at New Jersey Institute of Technology. In May 2000, he joined the Department of Electrical and Computer Engineering
at University of Florida where he got the early promotion with tenure in August 2003 and has been an Associate Professor since
then. He has published over one hundred (100) papers in refereed professional journals and conferences. He received the National
Science Foundation Faculty Early Career Award in 2001 and the Office of Naval Research Young Investigator Award in 2002.
He is currently serving as an Editor for many journals including IEEE Transactions on Communications, IEEE Transactions on
Wireless Communications, IEEE Transactions on Mobile Computing, and ACM Wireless Networks. He is also actively participating
in conference organization such as the Program Vice-Chair for IEEE INFOCOM’2005, Program Co-Chair for the Global Internet
and Next Generation Networks Symposium in IEEE Globecom’2004 and the Program Vice Chair for 2000 IEEE Wireless Communications
and Networking Conference (WCNC’2000). 相似文献
9.
An important objective of next-generation wireless networks is to provide quality of service (QoS) guarantees. This requires
a simple and efficient wireless channel model that can easily translate into connection-level QoS measures such as data rate,
delay and delay-violation probability. To achieve this, in Wu and Negi (IEEE Trans. on Wireless Communications 2(4) (2003)
630–643), we developed a link-layer channel model termed effective capacity, for the setting of a single hop, constant-bit-rate arrivals, fluid traffic, and wireless channels with negligible propagation
delay. In this paper, we apply the effective capacity technique to deriving QoS measures for more general situations, namely,
(1) networks with multiple wireless links, (2) variable-bit-rate sources, (3) packetized traffic, and (4) wireless channels
with non-negligible propagation delay.
Dapeng Wu received B.E. in Electrical Engineering from Huazhong University of Science and Technology, Wuhan, China, in 1990, M.E. in
Electrical Engineering from Beijing University of Posts and Telecommunications, Beijing, China, in 1997, and Ph.D. in Electrical
and Computer Engineering from Carnegie Mellon University, Pittsburgh, PA, in 2003. From July 1997 to December 1999, he conducted
graduate research at Polytechnic University, Brooklyn, New York. During the summers of 1998, 1999 and 2000, he conducted research
at Fujitsu Laboratories of America, Sunnyvale, California, on architectures and traffic management algorithms in the Internet
and wireless networks for multimedia applications.
Since August 2003, he has been with Electrical and Computer Engineering Department at University of Florida, Gainesville,
FL, as an Assistant Professor. His research interests are in the areas of networking, communications, multimedia, signal processing,
and information and network security. He received the IEEE Circuits and Systems for Video Technology (CSVT) Transactions Best
Paper Award for Year 2001.
Currently, he is an Associate Editor for the IEEE Transactions on Vehicular Technology and Associate Editor for International
Journal of Ad Hoc and Ubiquitous Computing. He served as Program Chair for IEEE/ACM First International Workshop on Broadband
Wireless Services and Applications (BroadWISE 2004); and as TPC member of over 20 conferences such as IEEE INFOCOM'05, IEEE
ICC'05, IEEE WCNC'05, and IEEE Globecom'04. He is Vice Chair of Mobile and wireless multimedia Interest Group (MobIG), Technical
Committee on Multimedia Communications, IEEE Communications Society. He is a member of the Award Committee, Technical Committee
on Multimedia Communications, IEEE Communications Society. He is also Director of Communications, IEEE Gainesville Section.
Rohit Negi received the B.Tech. degree in Electrical Engineering from the Indian Institute of Technology, Bombay, India in 1995. He
received the M.S. and Ph.D. degrees from Stanford University, CA, USA, in 1996 and 2000 respectively, both in Electrical Engineering.
He has received the President of India Gold medal in 1995.
Since 2000, he has been with the Electrical and Computer Engineering department at Carnegie Mellon University, Pittsburgh,
PA, USA, where he is an Assistant Professor. His research interests include signal processing, coding for communications systems,
information theory, networking, cross-layer optimization and sensor networks. 相似文献
10.
Wireless mesh networks (WMNs) are gaining growing interest as a promising technology for ubiquitous high-speed network access.
While much effort has been made to address issues at physical, data link, and network layers, little attention has been paid
to the security aspect central to the realistic deployment of WMNs. We propose UPASS, the first known secure authentication and billing architecture for large-scale WMNs. UPASS features a novel user-broker-operator
trust model built upon the conventional certificate-based cryptography and the emerging ID-based cryptography. Based on the
trust model, each user is furnished with a universal pass whereby to realize seamless roaming across WMN domains and get ubiquitous network access. In UPASS, the incontestable billing
of mobile users is fulfilled through a lightweight realtime micropayment protocol built on the combination of digital signature
and one-way hash-chain techniques. Compared to conventional solutions relying on a home-foreign-domain concept, UPASS eliminates
the need for establishing bilateral roaming agreements and having realtime interactions between potentially numerous WMN operators.
Our UPASS is shown to be secure and lightweight, and thus can be a practical and effective solution for future large-scale
WMNs.
Yanchao Zhang received the B.E. degree in Computer Communications from Nanjing University of Posts and Telecommunications, Nanjing, China,
in July 1999, and the M.E. degree in Computer Applications from Beijing University of Posts and Telecommunications, Beijing,
China, in April 2002. Since September 2002, he has been working towards the Ph.D. degree in the Department of Electrical and
Computer Engineering at the University of Florida, Gainesville, Florida, USA. His research interests are network and distributed
system security, wireless networking, and mobile computing, with emphasis on mobile ad hoc networks, wireless sensor networks,
wireless mesh networks, and heterogeneous wired/wireless networks.
Yuguang Fang received the BS and MS degrees in Mathematics from Qufu Normal University, Qufu, Shandong, China, in 1984 and 1987, respectively,
a Ph.D degree in Systems and Control Engineering from Department of Systems, Control and Industrial Engineering at Case Western
Reserve University, Cleveland, Ohio, in January 1994, and a Ph.D degree in Electrical Engineering from Department of Electrical
and Computer Engineering at Boston University, Massachusetts, in May 1997.
From 1987 to 1988, he held research and teaching position in both Department of Mathematics and the Institute of Automation
at Qufu Normal University. From September 1989 to December 1993, he was a teaching/research assistant in Department of Systems,
Control and Industrial Engineering at Case Western Reserve University, where he held a research associate position from January
1994 to May 1994. He held a post-doctoral position in Department of Electrical and Computer Engineering at Boston University
from June 1994 to August 1995. From September 1995 to May 1997, he was a research assistant in Department of Electrical and
Computer Engineering at Boston University. From June 1997 to July 1998, he was a Visiting Assistant Professor in Department
of Electrical Engineering at the University of Texas at Dallas. From July 1998 to May 2000, he was an Assistant Professor
in the Department of Electrical and Computer Engineering at New Jersey Institute of Technology, Newark, New Jersey. In May
2000, he joined the Department of Electrical and Computer Engineering at University of Florida, Gainesville, Florida, where
he got early promotion to Associate Professor with tenure in August 2003, and to Full Professor in August 2005. His research
interests span many areas including wireless networks, mobile computing, mobile communications, wireless security, automatic
control, and neural networks. He has published over one hundred and fifty (150) papers in refereed professional journals and
conferences. He received the National Science Foundation Faculty Early Career Award in 2001 and the Office of Naval Research
Young Investigator Award in 2002. He also received the 2001 CAST Academic Award. He is listed in Marquis Who’s Who in Science
and Engineering, Who’s Who in America and Who’s Who in World.
Dr. Fang has actively engaged in many professional activities. He is a senior member of the IEEE and a member of the ACM.
He is an Editor for IEEE Transactions on Communications, an Editor for IEEE Transactions on Wireless Communications, an Editor
for IEEE Transactions on Mobile Computing, an Editor for ACM Wireless Networks, and an Editor for IEEE Wireless Communications.
He was an Editor for IEEE Journal on Selected Areas in Communications: Wireless Communications Series, an Area Editor for
ACM Mobile Computing and Communications Review, an Editor for Wiley International Journal on Wireless Communications and Mobile
Computing, and Feature Editor for Scanning the Literature in IEEE Personal Communications. He has also actively involved with
many professional conferences such as ACM MobiCom’02 (Committee Co-Chair for Student Travel Award), MobiCom’01, IEEE INFOCOM’06,
INFOCOM’05 (Vice-Chair for Technical Program Committee), INFOCOM’04, INFOCOM’03, INFOCOM’00, INFOCOM’98, IEEE WCNC’04, WCNC’02,
WCNC’00 (Technical Program Vice-Chair), WCNC’99, IEEE Globecom’04 (Symposium Co-Chair), Globecom’02, and International Conference
on Computer Communications and Networking (IC3N) (Technical Program Vice-Chair). 相似文献
11.
IEEE 802.11 Wireless LAN (WLAN) has become a prevailing solution for broadband wireless Internet access while the Transport
Control Protocol (TCP) is the dominant transport-layer protocol in the Internet. Therefore, it is critical to have a good
understanding of the TCP dynamics over WLANs. In this paper, we conduct rigorous and comprehensive modeling and analysis of
the TCP performance over the emerging 802.11e WLANs, or more specifically, the 802.11e Enhanced Distributed Channel Access
(EDCA) WLANs. We investigate the effects of minimum contention window sizes and transmission opportunity (TXOP) limits (of
both the AP and stations) on the aggregate TCP throughput via analytical and simulation studies. We show that the best aggregate
TCP throughput performance can be achieved via AP’s contention-free access for downlink packet transmissions and the TXOP
mechanism. We also study the effects of some simplifying assumptions used in our analytical model, and simulation results
show that our model is reasonably accurate, particularly, when the wireline delay is small and/or the packet loss rate is
low.
Jeonggyun Yu received his B.E. degree in School of Electronic Engineering from Korea University, Seoul, Korea in 2002. He is currently working toward his Ph.D. in the School of Electrical Engineering at Seoul National University (SNU), Seoul, Korea. His research interests include QoS support, algorithm development, performance evaluation for wireless networks, in particular, IEEE 802.11 wireless local-area networks (WLANs). He is a student member of IEEE. Sunghyun Choi is currently an associate professor at the School of Electrical Engineering, Seoul National University (SNU), Seoul, Korea. Before joining SNU in September 2002, he was with Philips Research USA, Briarcliff Manor, New York, USA as a Senior Member Research Staff and a project leader for three years. He received his B.S. (summa cum laude) and M.S. degrees in electrical engineering from Korea Advanced Institute of Science and Technology (KAIST) in 1992 and 1994, respectively, and received Ph.D. at the Department of Electrical Engineering and Computer Science, The University of Michigan, Ann Arbor in September, 1999. His current research interests are in the area of wireless/ mobile networks with emphasis on wireless LAN/MAN/PAN, next-generation mobile networks, mesh networks, cognitive radios, resource management, data link layer protocols, and cross-layer approaches. He authored/coauthored over 120 technical papers and book chapters in the areas of wireless/mobile networks and communications. He has co-authored (with B. G. Lee) a book “Broadband Wireless Access and Local Networks: Mobile WiMAX and WiFi,” Artech House, 2008. He holds 15 US patents, nine European patents, and seven Korea patents, and has tens of patents pending. He has served as a General Co-Chair of COMSWARE 2008, and a Technical Program Committee Co-Chair of ACM Multimedia 2007, IEEE WoWMoM 2007 and IEEE/Create-Net COMSWARE 2007. He was a Co-Chair of Cross-Layer Designs and Protocols Symposium in IWCMC 2006, 2007, and 2008, the workshop co-chair of WILLOPAN 2006, the General Chair of ACM WMASH 2005, and a Technical Program Co-Chair for ACM WMASH 2004. He has also served on program and organization committees of numerous leading wireless and networking conferences including IEEE INFOCOM, IEEE SECON, IEEE MASS, and IEEE WoWMoM. He is also serving on the editorial boards of IEEE Transactions on Mobile Computing, ACM SIGMOBILE Mobile Computing and Communications Review (MC2R), and Journal of Communications and Networks (JCN). He is serving and has served as a guest editor for IEEE Journal on Selected Areas in Communications (JSAC), IEEE Wireless Communications, Pervasive and Mobile Computing (PMC), ACM Wireless Networks (WINET), Wireless Personal Communications (WPC), and Wireless Communications and Mobile Computing (WCMC). He gave a tutorial on IEEE 802.11 in ACM MobiCom 2004 and IEEE ICC 2005. Since year 2000, he has been a voting member of IEEE 802.11 WLAN Working Group. He has received a number of awards including the Young Scientist Award (awarded by the President of Korea) in 2008; IEEK/IEEE Joint Award for Young IT Engineer of the Year 2007 in 2007; the Outstanding Research Award in 2008 and the Best Teaching Award in 2006 both from the College of Engineering, Seoul National University; the Best Paper Award from IEEE WoWMoM 2008; and Recognition of Service Award in 2005 and 2007 from ACM. Dr. Choi was a recipient of the Korea Foundation for Advanced Studies (KFAS) Scholarship and the Korean Government Overseas Scholarship during 1997–1999 and 1994–1997, respectively. He is a senior member of IEEE, and a member of ACM, KICS, IEEK, KIISE. Daji Qiao is currently an assistant professor in the Department of Electrical and Computer Engineering, Iowa State University, Ames, Iowa. He received his Ph.D. degree in Electrical Engineering-Systems from The University of Michigan, Ann Arbor, Michigan, in February 2004. His current research interests include modeling, analysis and protocol/algorithm design for various types of wireless/mobile networks, including IEEE 802.11 Wireless LANs, mesh networks, and sensor networks. He is a member of IEEE and ACM. 相似文献
Daji QiaoEmail: |
Jeonggyun Yu received his B.E. degree in School of Electronic Engineering from Korea University, Seoul, Korea in 2002. He is currently working toward his Ph.D. in the School of Electrical Engineering at Seoul National University (SNU), Seoul, Korea. His research interests include QoS support, algorithm development, performance evaluation for wireless networks, in particular, IEEE 802.11 wireless local-area networks (WLANs). He is a student member of IEEE. Sunghyun Choi is currently an associate professor at the School of Electrical Engineering, Seoul National University (SNU), Seoul, Korea. Before joining SNU in September 2002, he was with Philips Research USA, Briarcliff Manor, New York, USA as a Senior Member Research Staff and a project leader for three years. He received his B.S. (summa cum laude) and M.S. degrees in electrical engineering from Korea Advanced Institute of Science and Technology (KAIST) in 1992 and 1994, respectively, and received Ph.D. at the Department of Electrical Engineering and Computer Science, The University of Michigan, Ann Arbor in September, 1999. His current research interests are in the area of wireless/ mobile networks with emphasis on wireless LAN/MAN/PAN, next-generation mobile networks, mesh networks, cognitive radios, resource management, data link layer protocols, and cross-layer approaches. He authored/coauthored over 120 technical papers and book chapters in the areas of wireless/mobile networks and communications. He has co-authored (with B. G. Lee) a book “Broadband Wireless Access and Local Networks: Mobile WiMAX and WiFi,” Artech House, 2008. He holds 15 US patents, nine European patents, and seven Korea patents, and has tens of patents pending. He has served as a General Co-Chair of COMSWARE 2008, and a Technical Program Committee Co-Chair of ACM Multimedia 2007, IEEE WoWMoM 2007 and IEEE/Create-Net COMSWARE 2007. He was a Co-Chair of Cross-Layer Designs and Protocols Symposium in IWCMC 2006, 2007, and 2008, the workshop co-chair of WILLOPAN 2006, the General Chair of ACM WMASH 2005, and a Technical Program Co-Chair for ACM WMASH 2004. He has also served on program and organization committees of numerous leading wireless and networking conferences including IEEE INFOCOM, IEEE SECON, IEEE MASS, and IEEE WoWMoM. He is also serving on the editorial boards of IEEE Transactions on Mobile Computing, ACM SIGMOBILE Mobile Computing and Communications Review (MC2R), and Journal of Communications and Networks (JCN). He is serving and has served as a guest editor for IEEE Journal on Selected Areas in Communications (JSAC), IEEE Wireless Communications, Pervasive and Mobile Computing (PMC), ACM Wireless Networks (WINET), Wireless Personal Communications (WPC), and Wireless Communications and Mobile Computing (WCMC). He gave a tutorial on IEEE 802.11 in ACM MobiCom 2004 and IEEE ICC 2005. Since year 2000, he has been a voting member of IEEE 802.11 WLAN Working Group. He has received a number of awards including the Young Scientist Award (awarded by the President of Korea) in 2008; IEEK/IEEE Joint Award for Young IT Engineer of the Year 2007 in 2007; the Outstanding Research Award in 2008 and the Best Teaching Award in 2006 both from the College of Engineering, Seoul National University; the Best Paper Award from IEEE WoWMoM 2008; and Recognition of Service Award in 2005 and 2007 from ACM. Dr. Choi was a recipient of the Korea Foundation for Advanced Studies (KFAS) Scholarship and the Korean Government Overseas Scholarship during 1997–1999 and 1994–1997, respectively. He is a senior member of IEEE, and a member of ACM, KICS, IEEK, KIISE. Daji Qiao is currently an assistant professor in the Department of Electrical and Computer Engineering, Iowa State University, Ames, Iowa. He received his Ph.D. degree in Electrical Engineering-Systems from The University of Michigan, Ann Arbor, Michigan, in February 2004. His current research interests include modeling, analysis and protocol/algorithm design for various types of wireless/mobile networks, including IEEE 802.11 Wireless LANs, mesh networks, and sensor networks. He is a member of IEEE and ACM. 相似文献
12.
Packet buffering-and-forwarding is a simple mechanism and has been widely used to provide seamless handoffs in many wireless/mobile
networks. However, some undesirable side effects of this mechanism, if not managed appropriately, can easily diminish its
effectiveness in providing seamless inter-cell transitions during a handoff. We first examine these side effects and show
how inappropriate buffer management by a mobility agent could affect the TCP performance. The throughput of TCP is then studied
with special emphasis on the effects of a handoff. We then propose a Last-Come-First-Drop (LCFD) buffer management policy
(to be employed by mobility agents) and post-handoff acknowledgement suppression (to be used by mobile nodes) to improvement
the TCP performance. Our enhancements are backward compatible and suitable for the gradual/incremental deployment. By deriving
an analytical model and conducting numerical analysis, we show that our scheme can improve the TCP throughput up to 30%. Finally,
we conduct the ns-2-based simulation to confirm these numerical results, and demonstrate the applicability of the analytic model for predicting
TCP throughput in other handoff schemes.
Chun-Ting Chou is currently a senior member research staff in Philips Research North America, Briarcliff Manor, New York. He received both
the B.S. and M.S. degrees in Electrical Engineering from National Taiwan University in 1995 and 1997, respectively. He received
the Ph.D. degree in Electrical Engineering and Computer Science from the University of Michigan, Ann Arbor, in 2004. He is
actively involved in standardization of WiMedia Ultra-Wide Band (UWB) Wireless PANs, IEEE 802.15.3c high-speed wireless PANs
and IEEE 802.15.5 meshed Wireless PANs. His current research interests include quality of service (QoS), MAC protocols for
UWB Wireless PANs, 60-GHz wireless PANs using directional antennas, meshed wireless LANs and PANs, and spectrum agile and
cooperative communication.
Kang G. Shin is the Kevin and Nancy O’Connor Professor of Computer Science and Founding Director of the Real-Time Computing Laboratory
in the Department of Electrical Engineering and Computer Science, The University of Michigan, Ann Arbor, Michigan. His current
research focuses on QoS-sensitive networking and computing as well as on embedded real-time OS, middleware and applications,
all with emphasis on timeliness and dependability. He has supervised the completion of 54 PhD theses, and authored/coauthored
around 630 technical papers and numerous book chapters in the areas of distributed real-time computing and control, computer
networking, fault-tolerant computing, and intelligent manufacturing. He has co-authored (jointly with C. M. Krishna) a textbook
“Real-Time Systems,” McGraw Hill, 1997.
He has received a number of best paper awards, including the IEEE Communications Society William R. Bennett Prize Paper Award
in 2003, the Best Paper Award from the IWQoS’03 in 2003, and an Outstanding IEEE Transactions of Automatic Control Paper Award
in 1987. He has also coauthored papers with his students which received the Best Student Paper Awards from the 1996 IEEE Real-Time
Technology and Application Symposium, and the 2000 UNSENIX Technical Conference. He has also received several institutional
awards, including the Research Excellence Award in 1989, Outstanding Achievement Award in 1999, Service Excellence Award in
2000, Distinguished Faculty Achievement Award in 2001, and Stephen Attwood Award in 2004 from The University of Michigan;
a Distinguished Alumni Award of the College of Engineering, Seoul National University in 2002; and 2003 IEEE RTC Technical
Achievement Award.
He received the B.S. degree in Electronics Engineering from Seoul National University, Seoul, Korea in 1970, and both the
M.S. and Ph.D degrees in Electrical Engineering from Cornell University, Ithaca, New York in 1976 and 1978, respectively.
From 1978 to 1982 he was on the faculty of Rensselaer Polytechnic Institute, Troy, New York. He has held visiting positions
at the U.S. Airforce Flight Dynamics Laboratory, AT &T Bell Laboratories, Computer Science Division within the Department
of Electrical Engineering and Computer Science at UC Berkeley, and International Computer Science Institute, Berkeley, CA,
IBM T. J. Watson Research Center, Software Engineering Institute at Carnegie Mellon University, and HP Research Laboratories.
He also chaired the Computer Science and Engineering Division, EECS Department, The University of Michigan for three years
beginning January 1991.
He is Fellow of IEEE and ACM, and member of the Korean Academy of Engineering, is serving as the General Chair for the 3rd
ACM/USENIX International Conference on Mobile Systems, Applications, and Services (MobiSys’05), was the General Chair of the
2000 IEEE Real-Time Technology and Applications Symposium, the Program Chair of the 1986 IEEE Real-Time Systems Symposium
(RTSS), the General Chair of the 1987 RTSS, the Guest Editor of the 1987 August special issue of IEEE Transactions on Computers on Real-Time Systems, a Program Co-Chair for the 1992 International Conference on Parallel Processing, and served numerous technical program committees. He also chaired the IEEE Technical Committee on Real-Time Systems during
1991--93, was a Distinguished Visitor of the Computer Society of the IEEE, an Editor of IEEE Trans. on Parallel and Distributed Computing, and an Area Editor ofInternational Journal of Time-Critical Computing Systems,Computer Networks, and ACM Transactions on Embedded Systems. 相似文献
13.
An efficient radio resource allocation scheme is crucial for guaranteeing the quality of service (QoS) requirements and fully
utilizing the scarce radio resources in wireless mobile networks. Most of previous studies of radio resource allocation in
traditional wireless networks concentrates on network layer connection blocking probability QoS. In this paper, we show that
physical layer techniques and QoS have significant impacts on network layer QoS. We use a concept of cross-layer effective
bandwidth to measure the unified radio resource usage taking into account both physical layer linear minimum-mean square error
(LMMSE) receivers and varying statistical characteristics of the packet traffic in code devision multiple access (CDMA) networks.
We demonstrate the similarity between traditional circuit-switched networks and packet CDMA networks, which enables rich theories
developed in traditional wireless mobile networks to be used in packet CDMA networks. Moreover, since both physical layer
signal-to-interference ratio (SIR) QoS and network layer connection blocking probability QoS are considered simultaneously,
we can explore the tradeoff between physical layer QoS and network layer QoS in packet CDMA networks.
This work is supported by Natural Science and Engineering Research Council of Canada. Please address all correspondence to
Professor Vikram Krishnamurthy at the above address.
Fei Yu received the Ph.D. degree in electrical engineering from the University of British Columbia in 2003. From 2002 to 2004, he
was with Ericsson (in Lund, Sweden), where he worked on the research and development of dual mode UMTS/GPRS handsets. From
2005, he has been working in Silicon Valley at a start-up, where he conducts research and development in the areas of advanced
wireless communication technologies and new standards. After completing the PhD, he has been a research associate in the Department
of Electrical and Computer Engineering at the University of British Columbia. His research interests include cross-layer optimization,
QoS provisioning and security in wireless networks.
Vikram Krishnamurthy (S’90-M’91-SM’99-F’05) was born in 1966. He received his bachelor’s degree from the University of Auckland, New Zealand in
1988, and Ph.D. from the Australian National University, Canberra, in 1992. Since 2002, he has been a professor and Canada
Research Chair at the Department of Electrical Engineering, University of British Columbia, Vancouver, Canada. Prior to this
he was a chaired professor at the Department of Electrical and Electronic Engineering, University of Melbourne, Australia.
His research interests span several areas including ion channels and nanobiology, stochastic scheduling and control, statistical
signal processing and wireless telecommunications. Dr. Krishnamurthy has served as associate editor for IEEE Transactions on Signal Processing, IEEE Transactions Aerospace and Electronic Systems, IEEE Transactions Nanobioscience, IEEE Transactions Circuits and Systems II, Systems and Control Letters and European Journal of Applied Signal Processing. He was guest editor of a special issue of IEEE Transactions on NanoBioScience, March 2005 on bio-nanotubes. 相似文献
14.
To efficiently support quality of service (QoS) in future wireless networks, it is important to model a wireless channel in
terms of connection-level QoS metrics such as data rate, delay and delay-violation probability. To achieve this, in [7], we
proposed and developed a link-layer channel model termed effective capacity (EC) for flat fading channels. In this paper, we apply the effective capacity technique to modeling frequency selective fading
channels. Specifically, we utilize the duality between the distribution of a queue with superposition of N i.i.d. sources, and the distribution of a queue with a frequency-selective fading channel that consists of N i.i.d. sub-channels, to model a frequency selective fading channel. In the proposed model, a frequency selective fading channel
is modeled by three EC functions; we also propose a simple and efficient algorithm to estimate these EC functions. Simulation
results show that the actual QoS metric is closely approximated by the QoS metric predicted by the proposed EC channel model.
The accuracy of the prediction using our model can translate into efficiency in admission control and resource reservation.
Dapeng Wu received B.E. in Electrical Engineering from Huazhong University of Science and Technology, Wuhan, China, in 1990, M.E. in
Electrical Engineering from Beijing University of Posts and Telecommunications, Beijing, China, in 1997, and Ph.D. in Electrical
and Computer Engineering from Carnegie Mellon University, Pittsburgh, PA, in 2003. From July 1997 to December 1999, he conducted
graduate research at Polytechnic University, Brooklyn, New York. During the summers of 1998, 1999 and 2000, he conducted research
at Fujitsu Laboratories of America, Sunnyvale, California, on architectures and traffic management algorithms in the Internet
and wireless networks for multimedia applications.
Since August 2003, he has been with Electrical and Computer Engineering Department at University of Florida, Gainesville,
FL, as an Assistant Professor. His research interests are in the areas of networking, communications, multimedia, signal processing,
and information and network security. He received the IEEE Circuits and Systems for Video Technology (CSVT) Transactions Best
Paper Award for Year 2001.
Currently, he is an Associate Editor for the IEEE Transactions on Vehicular Technology and Associate Editor for International
Journal of Ad Hoc and Ubiquitous Computing. He served as Program Chair for IEEE/ACM First International Workshop on Broadband
Wireless Services and Applications (BroadWISE 2004); and as TPC member of over 30 conferences. He is Vice Chair of Mobile
and wireless multimedia Interest Group (MobIG), Technical Committee on Multimedia Communications, IEEE Communications Society.
He is a member of the Best Paper Award Committee, Technical Committee on Multimedia Communications, IEEE Communications Society.
He is also Director of Communications, IEEE Gainesville Section.
Rohit Negi received the B.Tech. degree in Electrical Engineering from the Indian Institute of Technology, Bombay, India in 1995. He
received the M.S. and Ph.D. degrees from Stanford University, CA, USA, in 1996 and 2000 respectively, both in Electrical Engineering.
He has received the President of India Gold medal in 1995.
Since 2000, he has been with the Electrical and Computer Engineering department at Carnegie Mellon University, Pittsburgh,
PA, USA, where he is an Associate Professor. His research interests include signal processing, coding for communications systems,
information theory, networking, cross-layer optimization and sensor networks. 相似文献
15.
Optimal power control is of great importance for CDMA systems and it can be controlled to provide the desired quality of service
(QoS) to mobile hosts in a cellular radio system. The power levels of all the mobile hosts are determined and constantly tuned
in order to achieve the required SINR (signal to interference and noise ratio) which changes dynamically. The SINR of all
the K mobiles in a cell can be expressed in the form of a k-dimensional vector. It helps determine the operating point of the system and hence it is constantly monitored and updated
due to the variability in the wireless channel conditions and user mobility. We view this continuously changing vector as
the motion of a point in a higher dimensional Euclidean space, called the QoS space. We apply vector quantization technique to shrink the infinite-point space to a finite-point space by partitioning the former
into N regions such that the points within a region reflect almost similar system performance and are identified by what we call
a QoS index. We show how the system operating point can be mapped to one of the QoS indices. The location of the point or the region
of operability in the QoS space conveys the system status in terms of the current load and the QoS being delivered. The dynamism
in the system's input conditions due to wireless link characteristics and user mobility acts like an opposing force against
which the system has to operate. The system reacts to all such changes preventing it from going into a region with an undesirable
QoS index. We show how the apriori knowledge of the operating region helps in decision making pertaining to call admission
and resource allocation in CDMA systems.
Mainak Chatterjee received his Ph.D. from the department of Computer Science and Engineering at the University of Texas at Arlington in 2002.
Prior to that, he completed his B.Sc. with Physics (Hons) from the University of Calcutta in 1994 and M.E. in Electrical Communication
Engineering from the Indian Institute of Science, Bangalore. He is currently an Assistant Professor in the department of Electrical
and Computer Engineering at the University of Central Florida. His research interests include resource management and quality-of-service
provisioning in wireless and cellular networks, sensor networks, CDMA data networking, media access control protocols, Internet
traffic, and applied game theory.
Sajal K. Das is a Professor of Computer Science and Engineering and also the Founding Director of the Center for Research in Wireless
Mobility and Networking (CReWMaN) at the University of Texas at Arlington (UTA). His current research interests include resource
and mobility management in wireless networks, mobile and pervasive computing, wireless multimedia and QoS provisioning, sensor
networks, mobile Internet protocols, distributed processing and grid computing. He has published over 250 research papers,
directed numerous funded projects, and holds 5 US patents in wireless mobile networks. He received the Best Paper Awards in
ACM MobiCom'99, ICOIN-2001, ACM MSWIM-2000, and ACM/IEEE PADS'97. Dr. Das is also a recipeint of UTA's Outstanding Faculty
Research Award in Computer Science in 2001 and 2003, and UTA's College of Engineering Excellence in Research Award in 2003.
He serves on the Editorial Boards of IEEE Transactions on Mobile Computing, ACM/Kluwer Wireless Networks, Parallel Processing
Letters, Journal of Parallel Algorithms and Applications. He served as General Chair of IEEE PerCom-2004, CIT-2003 and IEEE
MASCOTS-2002; General Vice Chair of IEEE PerCom-2003, ACM MobiCom-2000 and HiPC 2000-01; General Chair of ACM WoWMoM 2000-02;
Program Chair of IWDC-2002, WoWMoM 1998-99; TPC Vice Chair of ICPADS-2002; and as TPC member of numerous IEEE and ACM conferences.
He is the Vice Chair of IEEE TCPP and TCCC. Prior to 1999, Dr. Das was a professor of computer science at Univeristy of North
Texas where he twice (1991 and 1997) received the Student Association's Honor Professor Award for best teaching and scholarly
research. He received B.Tech. degree in 1983 from Calcutta University, M.S. degree in 1984 from Indian Institute of Science,
Bangalore, and PhD degree in 1988 from the University of Central Florida, Orlando, all in Computer Science. 相似文献
16.
In this paper, we address the problem of user-class based service differentiation in CDMA networks. Users are categorized
into three classes who get differentiated services based on their expected quality of service (QoS) from the service provider
and the price they are willing to pay. We adopt a game theoretic approach for allocating resources through a two-step process.
During a service admission, resource distribution is determined for each class. Then, the resource allocated to each class
is distributed among the active users in that class. We devise a utility function for the providers which considers the expected
revenue and the probability of users leaving their service provider if they are not satisfied with the service. Our model
demonstrates how power can be controlled in a CDMA network to differentiate the service quality. Also, we show the impact
of admitting high paying users on other users.
Mainak Chatterjee received his Ph.D. from the department of Computer Science and Engineering at The University of Texas at Arlington in 2002.
Prior to that, he completed his B.Sc. with Physics (Hons) from the University of Calcutta in 1994 and M.E. in Electrical Communication
Engineering from the Indian Institute of Science, Bangalore, in 1998. He is currently an Assistant Professor in the department
of Electrical and Computer Engineering at the University of Central Florida. His research interests include economic issues
in wireless networks, applied game theory, resource management and quality-of-service provisioning, ad hoc and sensor networks,
CDMA data networking, and link layer protocols. He serves on the executive and technical program committee of several international
conferences.
Haitao Lin received the BE degree in radio engineering from Southeast University, Nanjing, China, in 1996, the MS degree in computer
applications from the Beijing University of Posts and Telecommunications, Beijing, China, in 2000, and Ph.D. in Computer Science
and Engineering from The University of Texas at Arlington in 2004. He is currently with Converged Multimedia Services System
Engineering at Nortel, Richardson, Texas. His research interests include wireless network performance evaluation and enhancement,
wireless link adaptation, wireless network resource management, and applied game theory.
Sajal K. Das received B.S. degree in 1983 from Calcutta University, M.S. degree in 1984 from Indian Institute of Science, Bangalore,
and Ph.D. degree in 1988 from University of Central Florida, Orlando, all in Computer Science. He is currently a Professor
of Computer Science and Engineering and also the Founding Director of the Center for Research in Wireless Mobility and Networking
(CReWMaN) at the University of Texas at Arlington (UTA). Prior to 1999, he was a professor of Computer Science at the University
of North Texas (UNT), Denton where he founded the Center for Research in Wireless Computing (CReW) in 1997, and also served
as the Director of the Center for Research in Parallel and Distributed Computing (CRPDC) during 1995–97. Dr. Das is a recipient
of the UNT Student Association's Honor Professor Award in 1991 and 1997 for best teaching and scholarly research; UNT's Developing
Scholars Award in 1996 for outstanding research; UTA's Outstanding Faculty Research Award in Computer Science in 2001 and
2003; and the UTA College of Engineering Research Excellence Award in 2003. He is also frequently invited as a keynote speaker
at international conferences and symposia.
Dr. Das' current research interests include mobile wireless communications, resource and mobility management in wireless networks,
mobile and pervasive computing, wireless multimedia, ad hoc and sensor networks, mobile internet architectures and protocols,
distributed and grid computing, performance modeling and simulation. He has published over 350 research papers in these areas
in international journals and conferences, directed numerous industry and government funded projects, and holds five US patents
in wireless mobile networks. He received four Best Paper Awards in the ACM MobiCom'99, ICOIN'01, ACM MSWiM'00, and ACM/IEEE
PADS'97. He as the Editor in Chief of the Pervasive and Mobile Computing (PMC) journal and also as an Associate Editor of
IEEE Transactions on Mobile Computing, ACM/Kluwer Wireless Networks, Parallel Processing Letters, Journal of Parallel, Distributed
and Emerging Systems. He served as General Chair of IEEE WoWMoM'05, PerCom'04, IWDC'04, MASCOTS'02, ACM WoWMoM'00-02; General
Vice Chair of IEEE PerCom'03, ACM MobiCom'00 and IEEE HiPC'00-01; Program Chair of IWDC'02, WoWMoM'98-99; TPC Vice Chair of
ICPADS'02; and as TPC member of numerous IEEE and ACM conferences. He is Vice Chair of the IEEE Computer Society's TCPP and
TCCC Executive Committees. 相似文献
17.
Integration of different kinds of wireless networks to provide people seamless and continuous network access services is a
major issue in the B3G network. In this paper, we propose and implement a novel Heterogeneous network Integration Support
Node design (HISN) and a distributed HISN network architecture for the integration of heterogeneous networks, under which
the Session Mobility, Personal Mobility, and Terminal Mobility for mobile users can be maintained through the Session Management
mechanism. Thus, the HISN node can serve as an agent for the user to access Internet services independent of underlying communication
infrastructure. Our design is transparent to the bearer networks and the deployment of the HISN network does not need to involve
the operators of the heterogeneous wireless networks.
This paper is an extension of the work that won the championship of the Mobile Hero contest sponsored by Industrial Development
Bureau of Ministry of Economic Affairs, Taiwan, R.O.C., and was awarded USD 30,000. The work of Lin, Chang and Cheng was supported
in part by the National Science Council (NSC), R.O.C, under the contract number NSC94-2213-E-002-083 and NSC94-2213-E-002-090,
and NSC 94-2627-E-002-001, Ministry of Economic Affairs (MOEA), R.O.C., under contract number 93-EC-17-A-05-S1-0017, the Computer
and Communications Researches Labs/Industrial Technology Research Institute (CCL/ITRL), Chunghwa Telecom Labs, Telcordia Applied
Research Center, Taiwan Network Information Center (TWNIC), and Microsoft Corporation, Taiwan. The work of Fang was supported
in part by the US National Science Foundation Faculty Early Career Development Award under grant ANI-0093241 and US National
Science Foundation under grant DBI-0529012.
Phone Lin (M’02-SM’06) received his BSCSIE degree and Ph.D. degree from National Chiao Tung University, Taiwan, R.O.C. in 1996 and
2001, respectively. From August 2001 to July 2004, he was an Assistant Professor in Department of Computer Science and Information
Engineering (CSIE), National Taiwan University, R.O.C. Since August 2004, he has been an Associate Professor in Department
of CSIE and Graduate Institute of Networking and Multimedia, National Taiwan University, R.O.C. His current research interests
include personal communications services, wireless Internet, and performance modeling. Dr. Lin is an Associate Editor for
IEEE Transactions on Vehicular Technology, a Guest Editor for IEEE Wireless Communications special issue on Mobility and Resource
Management, and a Guest Editor for ACM/Springer MONET special issue on Wireless Broad Access. He is also an Associate Editorial
Member for the WCMC Journal. P. Lin’s email and website addresses are plin@csie.ntu.edu.tw and http://www.csie.ntu.edu.tw/∼plin,
respectively.
Huan-Ming Chang received the BSCSIE degree and Master CSIE degree from National Taiwan University, R.O.C. in 2003 and 2005, respectively.
His current research interest includes wireless Internet. H.-M. Chang’s email address is r91114@csie.ntu.edu.tw.
Yuguang Fang received a Ph.D. degree in Systems and Control Engineering from Case Western Reserve University in January 1994, and a Ph.D.
degree in Electrical Engineering from Boston University in May 1997. From June 1997 to July 1998, he was a Visiting Assistant
Professor in Department of Electrical Engineering at the University of Texas at Dallas. From July 1998 to May 2000, he was
an Assistant Professor in the Department of Electrical and Computer Engineering at New Jersey Institute of Technology. In
May 2000, he joined the Department of Electrical and Computer Engineering at University of Florida where he got the early
promotion to Associate Professor with tenure in August 2003 and to Full Professor in August 2005. He has published over 180
papers in refereed professional journals and conferences. He received the National Science Foundation Faculty Early Career
Award in 2001 and the Office of Naval Research Young Investigator Award in 2002. He is currently serving as an Editor for
many journals including IEEE Transactions on Communications, IEEE Transactions on Wireless Communications, IEEE Transactions
on Mobile Computing, and ACM Wireless Networks. He is also actively participating in conference organization such as the Program
Vice-Chair for IEEE INFOCOM’2005, Program Co-Chair for the Global Internet and Next Generation Networks Symposium in IEEE
Globecom’2004 and the Program Vice Chair for 2000 IEEE Wireless Communications and Networking Conference (WCNC’2000).
Shin-Ming Cheng received the BSCSIE degree in 2000 from National Taiwan University, Taiwan, R.O.C., where he is currently working toward
the Ph.D. degree in the Department of Computer Science and Information Engineering, National Taiwan University. His current
research interests include mobile computing, personal communications services, and wireless Internet. S.-M. Cheng’s email
and website addresses are shimi@pcs.csie.ntu.edu.tw and http://www.pcs.csie.ntu.edu.tw/∼shimi, respectively. 相似文献
18.
Yu Cheng Xinhua Ling Lin X. Cai Wei Song Weihua Zhuang Xuemin Shen Alberto Leon-Garcia 《Wireless Networks》2009,15(1):73-86
This paper presents an analytical model for evaluating the statistical multiplexing effect, admission region, and contention
window design in multiclass wireless local area networks (WLANs). We consider distributed medium access control (MAC) which
provisions service differentiation by assigning different contention windows to different classes. Mobile nodes belonging
to different classes may have heterogeneous traffic arrival processes with different quality of service (QoS) requirements.
With bursty input traffic, e.g. on/off sources, our analysis shows that the WLAN admission region under the QoS constraint
can be significantly improved, when the statistical multiplexing effect is taken into account. We also analyze the MAC resource
sharing between the short-range dependent (SRD) on/off sources and the long-range dependent (LRD) fractional Brownian motion
(FBM) traffic, where the impact of the Hurst parameter on the admission region is investigated. Moveover, we demonstrate that
the proper selection of contention windows plays an important role in improving the WLAN’s QoS capability, while the optimal
contention window for each class and the maximum admission region can be jointly solved in our analytical model. The analysis
accuracy and the resource utilization improvement from statistical multiplexing gain and contention window optimization are
demonstrated by extensive numerical results.
Yu Cheng received the B.E. and M.E. degrees in Electrical Engineering from Tsinghua University, Beijing, China, in 1995 and 1998,
respectively, and the Ph.D. degree in Electrical and Computer Engineering from the University of Waterloo, Waterloo, Ontario,
Canada, in 2003. From September 2004 to July 2006, he was a postdoctoral research fellow in the Department of Electrical and
Computer Engineering, University of Toronto, Ontario, Canada. Since August 2006, he has been with the Department of Electrical
and Computer Engineering, Illinois Institute of Technology, Chicago, Illinois, USA, as an Assistant Professor. His research
interests include service and application oriented networking, autonomic network management, Internet performance analysis,
resource allocation, wireless networks, and wireless/wireline interworking. He received a Postdoctoral Fellowship Award from
the Natural Sciences and Engineering Research Council of Canada (NSERC) in 2004.
Xinhua Ling received the B. Eng. degree in Radio Engineering from Southeast University, Nanjing, China in 1993 and the M. Eng. degree
in Electrical Engineering from the National University of Singapore, Singapore in 2001. He is currently pursuing the Ph.D.
degree in the Department of Electrical and Computer Engineering at the University of Waterloo, Ontario, Canada. From 1993
to 1998, he was an R&D Engineer in Beijing Institute of Radio Measurement, China. From February 2001 to September 2002, he
was with the Centre for Wireless Communications (currently Institute for Infocom Research), Singapore, as a Senior R&D Engineer,
developing the protocol stack for UE in the UMTS system. His general research interests are in the areas of cellular, WLAN,
WPAN, mesh and ad hoc networks and their internetworking, focusing on protocol design and performance analysis.
Lin X. Cai received the B.Sc. degree in computer science from Nanjing University of Science and Technology, Nanjing, China, in 1996
and the MASc. degree in electrical and computer engineering from the University of Waterloo, Waterloo, Canada, in 2005. She
is currently working toward the Ph.D. degree in the same field at the University of Waterloo. Her current research interests
include network performance analysis and protocol design for multimedia applications over wireless networks.
Wei Song received the B.S. degree in electrical engineering from Hebei University, China, in 1998 and the M.S. degree in computer
science from Beijing University of Posts and Telecommunications, China, in 2001. She is currently working toward the Ph.D.
degree at the Department of Electrical and Computer Engineering, University of Waterloo, Canada. Her current research interests
include resource allocation and quality-of-service (QoS) provisioning for the integrated cellular networks and wireless local
area networks (WLANs).
Weihua Zhuang received the Ph.D. degree in electrical engineering from the University of New Brunswick, Canada. Since October 1993, she
has been with the Department of Electrical and Computer Engineering, University of Waterloo, Canada, where she is a Professor.
Dr. Zhuang is a co-author of the textbook Wireless Communications and Networking (Prentice Hall, 2003). Her current research interests include multimedia wireless communications, wireless networks, and
radio positioning. She received the Outstanding Performance Award in 2005 and 2006 from the University of Waterloo and the
Premier’s Research Excellence Award in 2001 from the Ontario Government for demonstrated excellence of scientific and academic
contributions. She is the Editor-in-Chief of IEEE Transactions on Vehicular Technology and an Editor of IEEE Transactions on Wireless Communications.
Xuemin (Sherman) Shen received the B.Sc.(1982) degree from Dalian Maritime University (China) and the M.Sc. (1987) and Ph.D. degrees (1990) from
Rutgers University, New Jersey (USA), all in electrical engineering. He is a Professor and the Associate Chair for Graduate
Studies, Department of Electrical and Computer Engineering, University of Waterloo, Canada. His research focuses on mobility
and resource management in interconnected wireless/wired networks, UWB wireless communications systems, wireless security,
and ad hoc and sensor networks. He is a co-author of three books, and has published more than 300 papers and book chapters
in wireless communications and networks, control and filtering. Dr. Shen serves as the Technical Program Committee Chair for
IEEE Globecom’07, General Co-Chair for Chinacom’07 and QShine’06, the Founding Chair for IEEE Communications Society Technical
Committee on P2P Communications and Networking. He also serves as a Founding Area Editor for IEEE Transactions on Wireless Communications; Associate Editor for IEEE Transactions on Vehicular Technology; KICS/IEEE Journal of Communications and Networks; Computer Networks (Elsevier); ACM/Wireless Networks; and Wireless Communications and Mobile Computing (John Wiley), etc. He has also served as Guest Editor for IEEE JSAC, IEEE Wireless Communications, and IEEE Communications Magazine. Dr. Shen received the Excellent Graduate Supervision Award in 2006, and the Outstanding Performance Award in 2004 from the
University of Waterloo, the Premier’s Research Excellence Award in 2003 from the Province of Ontario, Canada, and the Distinguished
Performance Award in 2002 from the Faculty of Engineering, University of Waterloo. Dr. Shen is a registered Professional Engineer
of Ontario, Canada.
Alberto Leon-Garcia received the B.S., M.S., and Ph.D. degrees in electrical engineering from the University of Southern California, in 1973,
1974, and 1976 respectively. He is a Full Professor in the Department of Electrical and Computer Engineering, University of
Toronto, ON, Canada, and he currently holds the Nortel Institute Chair in Network Architecture and Services. In 1999 he became
an IEEE fellow for “For contributions to multiplexing and switching of integrated services traffic”.
Dr. Leon-Garcia was Editor for Voice/Data Networks for the
IEEE Transactions on Communications from 1983 to 1988 and Editor for the IEEE Information Theory Newsletter from 1982 to 1984. He was Guest Editor of the September 1986 Special Issue on Performance Evaluation of Communications Networks
of the IEEE Selected Areas on Communications. He is also author of the textbooks Probability and Random Processes for Electrical Engineering (Reading, MA: Addison-Wesley), and Communication Networks: Fundamental Concepts and Key Architectures (McGraw-Hill), co-authored with Dr. Indra Widjaja. 相似文献
19.
The wireless data services are getting more and more competitive because of the presence of multiple service providers, all
of whom offer some relative advantages and flexibilities over the others. As a result, the user churn behavior (i.e., migration
from one service provider to another) is causing tremendous revenue loss for the service providers and also failure of existing
resource management algorithms to fully capture the impact of churning. Moreover, the quality of service (QoS) offered to
users belonging to different classes calls for new resource management schemes that address the issues related to differentiated
services.
In this paper, we propose a framework to study the impact of user churn behavior on the resource management algorithms to
provide class-based differentiated services in CDMA data networks. In particular, our framework incorporates the user churning
behavior into the admission control and power management algorithms, so that the service provider’s revenue loss due to churn
can be minimized. Since optimal rate/power allocation in multi-rate CDMA systems is in general NP-Complete, we provide heuristics
that try to provide solutions to the resource allocation problem in real-time. In our proposed framework, we add another layer
of power management called Class-Based Power Allocation/Reduction (CBPAR) function, which works with the rate control algorithm
to achieve power allocation. With CBPAR, the number of variables of the optimization problem is significantly reduced helping
achieve the results in real-time. Our simulation study shows that the service provider’s revenue can be improved with the
help of CBPAR framework. It also reveals the relationship between users’ sensitivity and tolerance to QoS degradation and
optimal power allocations.
Haitao Lin received his PhD in Computer Science and Engineering from the University of Texas at Arlington in 2004. He received his B.E.
degree in Radio Engineering from Southeast University, Nanjing, China, in 1996 and the MS degree in Computer Applications
from the Beijing University of Posts and Telecommunications, Beijing, China, in 2000. He is currently with Converged Multimedia
Networks (CMN) Systems Engineering at Nortel, Richardson, Texas. His research interests include wireless network performance
evaluation and enhancement, wireless link adaptation, wireless network resource management, applied game theory, network overload
control performance modeling and analysis.
Mainak Chatterjee received his Ph.D. from the department of Computer Science and Engineering at The University of Texas at Arlington in 2002.
Prior to that, he completed his B.Sc. with Physics (Hons) from the University of Calcutta in 1994 and M.E. in Electrical Communication
Engineering from the Indian Institute of Science, Bangalore, in 1998. He is currently an Assistant Professor in the department
of Electrical and Computer Engineering at the University of Central Florida. His research interests include economic issues
in wireless networks, applied game theory, resource management and quality-of-service provisioning, ad hoc and sensor networks,
CDMA data networking, and link layer protocols. He serves on the executive and technical program committee of several international
conferences.
Sajal K. Das received the BTech degree in 1983 from Calcutta University, the MS degree in 1984 from the Indian Institute of Science, Bangalore,
and the PhD degree in 1988 from the University of Central Florida, Orlando, all in computer science. Prior to 1999, he was
a professor of computer science at the University of North Texas, where he twice (in 1991 and 1997) received the Student Associationís
Honor Professor Award for best teaching and scholarly research. Currently, he is a professor of computer science and engineering
and also the founding director of the Center for Research in Wireless Mobility and Networking (CReWMaN) at the University
of Texas at Arlington (UTA). His current research interests include resource and mobility management in wireless and sensor
networks, mobile and pervasive computing, wireless multimedia and QoS provisioning, mobile Internet protocols, distributed
processing, and grid computing. He has published more than 350 research papers, directed numerous funded projects, and holds
five US patents in wireless mobile networks. He received the Best Paper Award in ACM MobiComí99, ICOINí01, ACM MSWIMí00, and
ACM/IEEE PADSí97. He was also a recipient of UTAís Outstanding Faculty Research Award in Computer Science in 2001 and 2003,
and UTAís College of Engineering Excellence in Research Award in 2003. He is the coauthor of a book Smart Environments: Technology,
Protocols and Applications, published in 2004 by John Wiley. Dr. Das is the editor-in-chief of the Pervasive and Mobile Computing
journal and serves on the editorial Boards of four international journals, including IEEE Transactions on Mobile Computing
and ACM/Kluwer Wireless Networks. He has served as general chair of IEEE WoWMoMí05, IWDCí04, IEEE PerComí04, CITí03, and IEEE
MASCOTSí02; general vice chair of IEEE PerComí03, ACM Mobi- Comí00, and HiPCí00-01; program chair of IWDCí02 and WoWMoMí98-99;
TPC vice chair of CITí05 and ICPADSí02; and as TPC member of numerous IEEE and ACM conferences. He is the vice chair of IEEE
Technical Committees (TCPP and TCCC) and on the Advisory Boards of several cutting-edge companies. He is a member of the IEEE
Computer Society. 相似文献
20.
Subalakshmi Venugopal Wesley Chen T. D. Todd Krishna Sivalingam 《Wireless Networks》2007,13(1):93-105
This paper considers a low power wireless infrastructure network that uses multi-hop communications to provide end user connectivity.
A generalized Rendezvous Reservation Protocol (RRP) is proposed which permits multi-hop infrastructure nodes to adapt their
power consumption in a dynamic fashion. When nodes have a long-term association, power consumption can be reduced by having
them periodically rendezvous for the purpose of exchanging data packets. In order to support certain applications, the system
invokes a connection set up process to establish the end-to-end path and selects node rendezvous rates along the intermediate
nodes to meet the application’s quality of service (QoS) needs. Thus, the design challenge is to dynamically determine rendezvous
intervals based on incoming applications’ QoS needs, while conserving battery power. In this paper, we present the basic RRP
mechanism and an enhanced mechanism called Rendezvous Reservation Protocol with Battery Management (RRP-BM) that incorporates
node battery level information. The performance of the system is studied using discrete-event simulation based experiments
for different network topologies. The chief metrics considered are average power consumption and system lifetime (that is to be maximized). The QoS metrics specified are packet latency and end-to-end setup latency. It is shown that the
use of the RRP-BM can increase the lifetime up to 48% as compared to basic RRP by efficiently reducing the energy consumption.
This work was supported by a grant from the Natural Sciences and Engineering Research Council of Canada and Communications
and Information Technology Ontario (CITO). Part of the research was supported by Air Force Office of Scientific Research grants
F-49620-97-1-0471 and F-49620-99-1-0125; Laboratory for Telecommunications Sciences, Adelphi, Maryland; and Intel Corporation.
The authors may be reached via e-mail at todd@mcmaster. ca, krishna@umbc. edu. The basic RRP mechanism was presented at the
IASTED International Conference on Wireless and Optical Communications, Banff, Canada, July 2002.
Subalakshmi Venugopal received her Bachelors in Computer Science from R.V. College of Engineering, Bangalore, India and her M.S. degree in Computer
Science from Washington State University. She interned as a student researcher at the Indian Institute of Science, Bangalore,
India. Ms. Venugopal is currently employed with Microsoft Corporation in Redmond, WA and is part of the “Kids and Education
Group”. Her research interests include low power wireless ad hoc networks.
Zhengwei (Wesley) Chen received the M.E. in Electrical & Computer Engineering Dept from McMaster University in Canada in 2002. He joined Motorola
Inc. as a CDMA2000 system engineer in 2000. In 2002, he joined UTStarcom as a manager of the Global Service Solution Department.
He is currently in charge of R&D for Advanced Services related to the TVoIP and Softswitch products.
Terry Todd received the B.A.Sc, M.A.Sc and Ph.D degrees in Electrical Engineering from the University of Waterloo in Waterloo, Ontario,
Canada. While at Waterloo he also spent 3 years as a Research Associate with the Computer Communications Networks Group (CCNG).
During that time he worked on the Waterloo Experimental Local Area Network, which was an early local area network testbed.
In 1991 Dr. Todd was on research leave in the Distributed Systems Research Department at AT&T Bell Laboratories in Murray
Hill, NJ. He also spent 1998 as a visiting researcher at The Olivetti and Oracle Research Laboratory (ORL) in Cambridge, England.
While at ORL he worked on the piconet project, which was an embedded low power wireless network testbed. Dr. Todd is currently
a Professor of Electrical and Computer Engineering at McMaster University in Hamilton, Ontario, Canada. At McMaster he has
been the Principal Investigator on a number of major research projects in the optical and wireless networking areas. He currently
directs a large group working on wireless mesh networks and wireless VoIP. Professor Todd holds the NSERC/RIM/CITO Chair on
Pico-Cellular Wireless Internet Access Networks. Dr. Todd’s research interests include metropolitan/local area networks, wireless
communications and the performance analysis of computer communication networks and systems. Professor Todd is a Professional
Engineer in the province of Ontario.
Krishna M. Sivalingam is an Associate Professor in the Dept. of CSEE at University of Maryland, Baltimore County. Previously, he was with the School
of EECS at Washington State University, Pullman from 1997 until 2002; and with the University of North Carolina Greensboro
from 1994 until 1997. He has also conducted research at Lucent Technologies’ Bell Labs in Murray Hill, NJ, and at AT&T Labs
in Whippany, NJ. He received his Ph.D. and M.S. degrees in Computer Science from State University of New York at Buffalo in
1994 and 1990 respectively; and his B.E. degree in Computer Science and Engineering in 1988 from Anna University, Chennai
(Madras), India. While at SUNY Buffalo, he was a Presidential Fellow from 1988 to 1991.
His research interests include wireless networks, optical wavelength division multiplexed networks, and performance evaluation.
He holds three patents in wireless networks and has published several research articles including more than thirty journal
publications. He has published an edited book on Wireless Sensor Networks in 2004 and edited books on optical WDM networks
in 2000 and 2004. He served as a Guest Co-Editor for special issues of the ACM MONET journal on “Wireless Sensor Networks”
in 2003 and 2004; and an issue of the IEEE Journal on Selected Areas in Communications on optical WDM networks (2000). He
is co-recipient of the Best Paper Award at the IEEE International Conference on Networks 2000 held in Singapore. His work
has been supported by several sources including AFOSR, NSF, Cisco, Intel and Laboratory for Telecommunication Sciences. He
is a member of the Editorial Board for ACM Wireless Networks Journal, IEEE Transactions on Mobile Computing, Ad Hoc and Sensor
Wireless Networks Journal, and KICS Journal of Computer Networks.
He serves as Steering Committee Co-Chair for IEEE/CreateNet International Conference on Broadband Networks (BroadNets) that
was created in 2004. He is currently serving as General Co-Vice-Chair for the Second Annual International Mobiquitous conference
to be held in San Diego in 2005 and as General Co-Chair for the First IEEE/CreateNet International Conference on Security
and Privacy for Emerging Areas in Communication Networks (SecureComm) to be held in Athens, Greece in Sep. 2005. He served
as Technical Program Co-Chair for the First IEEE Conference on Sensor and Ad Hoc Communications and Networks (SECON) held
at Santa Clara, CA in 2004; as General Co-Chair for SPIE Opticomm 2003 (Dallas, TX) and for ACM Intl. Workshop on Wireless
Sensor Networks and Applications (WSNA) 2003 held in conjunction with ACM MobiCom 2003 at San Diego, CA; as Technical Program
Co-Chair of SPIE/IEEE/ACM OptiComm conference at Boston, MA in July 2002; and as Workshop Co-Chair for WSNA 2002 held in conjunction
with ACM MobiCom 2002 at Atlanta, GA in Sep 2002. He is a Senior Member of IEEE and a member of ACM. 相似文献