引入预留机制的多小区OFDMA系统资源分配方案  

An MRSVP based multi-cell resource allocation scheme for OFDMA systems

作　　者：刘蓓[1] 邱玲[1] 

机构地区：[1]中国科学技术大学个人通信与扩频实验室,安徽合肥230027

出　　处：《中国科学技术大学学报》2013年第1期50-56,共7页JUSTC

基　　金：国家科技重大专项(2008ZX03003-004;2008BAH30B09;2009ZX03002-001);国家重点基础研究发展(973)计划(2007CB310602)资助

摘　　要：高速移动会加剧用户在小区间的频繁切换.如果用户突发切换到邻小区,会由于在多小区资源分配中没有考虑到为该用户预留资源导致资源不足,从而拒绝该用户或者小区内其他业务用户接入,这极大地影响了移动用户的业务体验.为了解决上述问题,在多小区正交频分多址接入(OFDMA)系统资源分配时,引入了移动资源预留,提出了相应的无线资源分配框架.该框架根据用户移动模型得到移动预留信息,然后根据移动预留信息、干扰信息、用户的QoS需求为各基站分配和预留资源.避免小区间频繁切换给恶化时延敏感业务的业务体验,同时协调小区间资源块的分配,有效避免干扰,最大化系统吞吐率.仿真结果表明,该方案相比于仅考虑干扰的多小区资源分配方案在损失较少吞吐率的同时,能够更好地提高移动用户的业务体验.High mobility brings about frequent handovers between cells. If users suddenly switch to the neighboring cells, as the muti-cell resource allocation doesn＇t reserve resource to the users, it will increase the interruption duration, and significantly deteriorate the mobile users＇ experience. To solve this problem, a new mobile resource reservation protocol （MRSVP） based multi-cell resource allocation scheme for orthogonal frequency-division multiple access （OFDMA） systems was proposed. The mobility model, application QoS constraints, inter-cell interference and channel state information were jointly integrated into the proposed cross-layer design framework to dynamically reserve resource, and perform radio resource allocation for multiple users. This framework is capable of offering guaranteed services, avoiding multi-cell interference, while maximizing the system throughput. By means of simulations, it is further shown that the proposed scheme can improve the traffic experience of mobile hosts significantly with negligible loss of system throughput.

关 键 词：服务质量 移动用户 资源分配 移动资源预留协议 OFDMA 

分 类 号：TN929[电子电信—通信与信息系统]