共查询到15条相似文献,搜索用时 87 毫秒
1.
2.
3.
介绍了Ad Hoc网络中保障实时业务QoS要求的时间同步多址接入协议。该类协议以时分多址为基础,通过资源预留为实时业务预约固定的时隙,赋予实时业务接入信道的优先权,保证了实时业务的接入延时,延时抖动以及吞吐量等QoS指标,为Ad Hoc网络支持多媒体业务的接入奠定了基础。 相似文献
4.
一、什么是UWB 人们对实现高速率、高质量无线多媒体业务的需求越来越迫切,为构建短距离高速无线网络,有人提出了无线个人域网(WPAN)的概念。WPAN是一种覆盖半径较小、支持高速率多媒体应用并实现无缝连接的无线网络。WPAN是在便携式移动计算装置和家用电器,如数字摄像机、HDTV、数码相机、MP3播 相似文献
5.
6.
7.
8.
WiMedia超宽带平台的ECMA-368标准MAC协议 总被引:1,自引:0,他引:1
因IEEE 802.15.3 MAC集中式架构应用于超宽带系统存在问题,WiMedia联盟提出了新的ECMA-368MAC协议.本文着重研究了WiMedia MAC针对超宽带高速无线个域网的低功率、Ad-hoc网络及P2P移动性等特点设计的分布式架构及相关协议,并在文章的最后提出WiMedia MAC今后改进的建议. 相似文献
9.
针对认知无线多跳网中频谱资源具有较大时变性及差异性的问题,设计了一种结合QoS查找的跨层多信道MAC协议。该协议将按需QoS查找与动态频谱分配跨层相结合,仅让参与传输的节点执行频谱分配并按QoS要求获取频谱资源。此外,协议使用频分双工收发机实现了对公共控制信道的不间断监听,并设计了一套支持不同数量收发机节点间混合通信的接入算法。大量仿真结果表明,该协议能有效保证对端到端传输的QoS要求的满足,并显著提高端到端吞吐量及时延。 相似文献
10.
11.
In this paper we introduce a novel MAC protocol that provides Quality of Service (QoS) support for multimedia traffic in UWB-based
wireless local area networks. The proposed protocol allocates transmission opportunities to QoS and best effort traffic using
a set of scheduling and resource control algorithms. The algorithms account for the UWB characteristics such as the co-existence
of multiple simultaneous transmissions as well as the possibility of dynamically assigning the nodes' transmission rate and
power. The simulation results show that the proposed protocol can provide QoS support while optimizing resource utilization.
Yuechun Chu received her B.Sc. degree in electrical engineering from Shanghai University, China, in 1996 and M.Sc. degree in electrical
engineering from University of Science and Technology of China in 1999. She is currently pursuing the Ph.D. degree in the
department of electrical and computer engineering at the University of Massachusetts Amherst. Her research interests include
MAC protocol design for UWB-based networks, wireless multimedia applications, and architectures and protocols for wireless
networks with QoS guarantees.
Aura Ganz is currently an Associate Professor and Director of the Multimedia Networks Laboratory at the ECE Department, University
of Massachusetts at Amherst. She has experience in topics related to multimedia wireless networks, optical networks and ubiquitous
computing. The research results are validated by a combination of analytical, simulation and prototyping tools. She has published
a book “Multimedia Wireless Networks: Technologies, Standards and QoS” (Prentice Hall) and authored over one hundred and fifty
peer reviewed publications. Dr. Ganz received her BSc, MSc and Ph.D degrees in Computer Science from the Technion in Israel. 相似文献
12.
14.