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11.
Residential networks are expected to open a huge market and introduce a bright, new era in telecommunications, by exponentially
increasing the network usage, via broadband, added value services. Despite the business risks, investments made by the telecommunication
industries clearly express the belief that the home networking market is about to take off. In this paper, a home network
architecture for the provision of interactive multimedia services is considered and various access and indoor networking alternatives
are presented. Then the focus is put on the Residential Gateway (RG), as a single point of networks convergence. Based on
prototypes development, laboratory experiments and field trials throughout Europe and USA, a modular and a compact RG hardware
architecture are described and compared, while the software architecture to support the RG functionality is described and
the main building blocks are analyzed. Finally, a Web browser-based network management and control application that provides
a visual metaphor of the RG is presented.
This revised version was published online in September 2006 with corrections to the Cover Date. 相似文献
12.
Telecommunication Systems - 相似文献
13.
Global roaming in next-generation networks 总被引:5,自引:0,他引:5
Zahariadis T.B. Vaxevanakis K.G. Tsantilas C.P. Zervos N.A. Nikolaou N.A. 《Communications Magazine, IEEE》2002,40(2):145-151
Next-generation mobile/wireless networks are already under preliminary deployment. Mobile/wireless all-IP networks are expected to provide a substantially wider and enhanced range of services. However, an evolutionary rather than revolutionary approach to the deployment of a global all-IP wireless/mobile network is expected. To support global roaming, next-generation networks will require the integration and interoperation of mobility management processes under a worldwide wireless communications infrastructure. In this article global roaming is addressed as one of the main issues of next-generation mobile networks. Apart from the physical layer connectivity and radio spectrum allocation plans, mobility in a hierarchical structured scheme is discussed. An all-IP wireless/mobile network combined with inherited mobility schemes of each network layer and Mobile IP extensions is proposed. In this respect the mobility management mechanisms in WLAN, cellular, and satellite networks are analyzed, and an all-IP architecture is described and an enhanced roaming scenario presented 相似文献
14.
Zahariadis T. Pramataris K. Zervos N. 《Electronics & Communication Engineering Journal》2002,14(4):133-142
Connecting each house to a broadband access network represents an unprecedented opportunity to offer added-value services and broadband Internet access to residential users and expand the customer base beyond the corporate environment. Home networks, however, may be the last barrier to end-to-end multimedia service provisioning. Although a large number of houses have PCs, modems or multimedia network-enabled appliances, the majority are not equipped to support their interconnection, and most consumers are unwilling or cannot afford large-scale home rewiring. This paper reviews the available home-networking technologies and provides a comparison of the competing broadband in-home technologies. The focus is on technologies that do not require rewiring the home, either reusing the existing wiring or using wireless technology. The paper also discusses the residential gateway (RG) initiative, which provides a single point of convergence between the in-home and the access networks 相似文献
15.
The Internet is incontrovertibly a great success that has changed our social and economic world. Today, over one billion users access the Internet on regular basis, more than 100 million users have downloaded at least one (multi) media file, and over 47 million of them do so regularly, searching in more than 160 exabytes of content. The content is expected to rise to more than 990 exabytes before 2012, fueled mainly by the users themselves [1]. It is envisaged that in the near- to mid-term future, mobile Internet will provide the means to share and distribute (new) multimedia content and services with superior quality and striking flexibility, in a trusted and personalized way, improving citizens? quality of life, working conditions, edutainment, and safety. 相似文献
16.
Theodore Zahariadis Federico Alvarez John Paul Moore Olmstead 《Multimedia Tools and Applications》2014,70(1):297-309
Internet is the most important information exchange means nowadays and has become the core communication environment, not only for business relations, but also for social and human interaction. Yet, the immense success of Internet has created even higher hopes and expectations for new immersive and real-time applications and services. However, there are no guarantees that the current Internet will be able to support them. To face the new requirements coming from these new applications and services, several architectural approaches have been proposed. Evolutionary and clean-slate approaches, based on content-centric architectures, have been proposed for meeting new requirements regarding media. This paper highlights the main architectural functions and presents a revolutionary protocol stack and a holistic architectural approach that targets Future Media Internet (FMI). Among the architectural functions and the holistic approach, the paper presents solutions to overcome the current content delivery limitations, moving intelligence in the network and converting it into a content oriented/centric network, that goes well beyond current CDNs; supporting the functionalities for producing, publishing, caching, finding and consuming content; and a novel Future Media Internet protocol stack and network architecture. 相似文献
17.
(R)evolution toward 4G mobile communication systems 总被引:1,自引:0,他引:1
18.
Theodore Zahariadis Panagiotis Trakadas Helen C. Leligou Sotiris Maniatis Panagiotis Karkazis 《Wireless Personal Communications》2013,69(2):805-826
Wireless sensor networks are vulnerable to a wide set of security attacks, including those targeting the routing protocol functionality. The applicability of legacy security solutions is disputable (if not infeasible), due to severe restrictions in node and network resources. Although confidentiality, integrity and authentication measures assist in preventing specific types of attacks, they come at high cost and, in most cases, cannot shield against routing attacks. To face this problem, we propose a secure routing protocol which adopts the geographical routing principle to cope with the network dimensions, and relies on a distributed trust model for the detection and avoidance of malicious neighbours. A novel function which adaptively weights location, trust and energy information drives the routing decisions, allowing for shifting emphasis from security to path optimality. The proposed trust model relies on both direct and indirect observations to derive the trustworthiness of each neighboring node, while it is capable of defending against an increased set of routing attacks including attacks targeting the indirect trust management scheme. Extensive simulation results reveal the advantages of the proposed model. 相似文献
19.
Panagiotis Karkazis Panagiotis Trakadas Helen C. Leligou Lambros Sarakis Ioannis Papaefstathiou Theodore Zahariadis 《Wireless Networks》2013,19(6):1269-1284
The use of Wireless Sensor Networks (WSN) in a wide variety of application domains has been intensively pursued lately while Future Internet designers consider WSN as a network architecture paradigm that provides abundant real-life real-time information which can be exploited to enhance the user experience. The wealth of applications running on WSNs imposes different Quality of Service requirements on the underlying network with respect to delay, reliability and loss. At the same time, WSNs present intricacies such as limited energy, node and network resources. To meet the application’s requirements while respecting the characteristics and limitations of the WSN, appropriate routing metrics have to be adopted by the routing protocol. These metrics can be primary (e.g. expected transmission count) to capture a specific effect (e.g. link reliability) and achieve a specific goal (e.g. low number of retransmissions to economize resources) or composite (e.g. combining latency with remaining energy) to satisfy different applications needs and WSNs requirements (e.g. low latency and energy consumption at the same time). In this paper, (a) we specify primary routing metrics and ways to combine them into composite routing metrics, (b) we prove (based on the routing algebra formalism) that these metrics can be utilized in such a way that the routing protocol converges to optimal paths in a loop-free manner and (c) we apply the proposed approach to the RPL protocol specified by the ROLL group of IETF for such low power and lossy link networks to quantify the achieved performance through extensive computer simulations. 相似文献
20.
Theodore Zahariadis Karsten Grüneberg Luca Celetto 《Mobile Networks and Applications》2011,16(3):351-360
Widespread and affordable mobile broadband access opens up opportunities for delivery of new streaming services everywhere and anytime. However, what is expected to fundamentally change the way how people use the network is the ability to produce, and seamlessly deliver and share their own multimedia content. In this paper we describe the content distribution and adaptation architecture that we have implemented and tested, the results utilising new coding formats of video coding (e.g. SVC, MVC) and new methods for increasing the robustness of video delivery. 相似文献