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蜂窝无线通信网络呼叫允许控制分析 被引量:4
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作者 马育锋 龚沈光 +1 位作者 胡修林 张蕴玉 《通信学报》 EI CSCD 北大核心 2006年第5期107-114,共8页
无线网络中由于用户的移动性、频谱资源的缺乏以及信道的衰落,使无线网络的服务质量的供给成为一个日益严峻的问题。呼叫允许控制(CAC)是无线资源管理中的重要组成部分,是一种保证服务质量和网络资源利用率的重要机制。总结了CAC领域的... 无线网络中由于用户的移动性、频谱资源的缺乏以及信道的衰落,使无线网络的服务质量的供给成为一个日益严峻的问题。呼叫允许控制(CAC)是无线资源管理中的重要组成部分,是一种保证服务质量和网络资源利用率的重要机制。总结了CAC领域的研究成果,对蜂窝无线通信网络的CAC方案进行了分析,指出了目前CAC研究中存在的问题,并探讨了今后的研究方向。 展开更多
关键词 蜂窝无线通信网络 呼叫允许控制 服务质量
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Power Versus Bandwidth Efficiency in Wireless Communications:from Economic Sustainability to Green Radio 被引量:1
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作者 Yosef Akhtman Lajos Hanzo 《China Communications》 SCIE CSCD 2010年第2期6-15,共10页
We carry out a comprehensive analysis of a range of wireless network efficiency considerations. Firstly, we explore the properties and the implications of the power-versus bandwidth-efficiency criteria. Secondly, we p... We carry out a comprehensive analysis of a range of wireless network efficiency considerations. Firstly, we explore the properties and the implications of the power-versus bandwidth-efficiency criteria. Secondly, we perform a detailed top-down analysis of a typical commercial wireless network, which emphasizes the inherent differences between the aforementioned two efficiency metrics, while demonstrating that the appropriate choice of the network optimization criterion can have a profound effect on the overall network performance. Finally, we address the issue of resource management and its impact on the definition of the overall system efficiency. Our results suggest that no substantial area spectral efficiency gains beyond those exhibited by the 2G cellular technol- ogy may be economically achieved, and hence, no significant economic gains may be realized by simply increasing the bps/Hz bandwidth efficiency. In contrast, manifold utility and throughput gains as well as substantial Quality of Service enhancements may be attained by the appropriate combination of improved power efficiency, bandwidth expansion as well as the appropriate evolution of the networking paradigm. 展开更多
关键词 green radio economic aspects ofwireless communications bandwidth versus powerefficiency
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Scheduling Scheme for Cellular-Based Machine-Type Communication 被引量:1
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作者 李红艳 杜白 +1 位作者 索龙 李建东 《China Communications》 SCIE CSCD 2011年第1期145-150,共6页
Cellular-based Machine-Type Communication (MTC) will become more and more important in the near future for the advantage of the long-distance wireless communication.However,a large number of MTC applications introduce... Cellular-based Machine-Type Communication (MTC) will become more and more important in the near future for the advantage of the long-distance wireless communication.However,a large number of MTC applications introduce heavy load to cellular network.MTC traffic scheduling schemes are proposed to avoid congestion in this paper.Our approaches are based on the delay-tolerance of MTC traffic.Some MTC traffic is postponed until the network load becomes light.Moreover,our scheme efficiently utilizes the bandwidth resources reserved for handover in traditional cellular network.Simulation results show that the utility usage of radio resources is improved and the congestion probability is reduced. 展开更多
关键词 Machine-Type Communication traffic scheduling congestion avoidance
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Offloading Mobile Data from Cellular Networks Through Peer-to-Peer WiFi Communication:A Subscribe-and-Send Architecture 被引量:1
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作者 芦效峰 HUI Pan Pietro Lio 《China Communications》 SCIE CSCD 2013年第6期35-46,共12页
Currently cellular networks do not have sufficient capacity to accommodate the exponential growth of mobile data requirements.Data can be delivered between mobile terminals through peer-to-peer WiFi communications(e.g... Currently cellular networks do not have sufficient capacity to accommodate the exponential growth of mobile data requirements.Data can be delivered between mobile terminals through peer-to-peer WiFi communications(e.g.WiFi direct),but contacts between mobile terminals are frequently disrupted because of the user mobility.In this paper,we propose a Subscribe-and-Send architecture and an opportunistic forwarding protocol for it called HPRO.Under Subscribe-and-Send,a user subscribes contents on the Content Service Provider(CSP) but does not download the subscribed contents.Some users who have these contents deliver them to the subscribers through WiFi opportunistic peer-to-peer communications.Numerical simulations provide a robust evaluation of the forwarding performance and the traffic offloading performance of Subscribe-and-Send and HPRO. 展开更多
关键词 mobile Internet cellular networks offioad opportunistic routing delay tolerant networks peer-to-peer WiFi
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