MIMO链路ad hoc网络传输调度算法  

Transmission scheduling algorithm for MIMO link ad hoc networks

作　　者：陈丹[1] 李建东[1] 李长乐[1] CHEN Dan;LI JianDong;LI ChangLe(State Key Laboratory of Integrated Service Networks,Xidian University,Xi’an 710071,China)

机构地区：[1]西安电子科技大学综合业务网络理论及关键技术国家重点实验室,西安710071

出　　处：《中国科学：信息科学》2012年第2期161-170,共10页Scientia Sinica(Informationis)

基　　金：国家杰出青年科学基金(批准号:60725105);国家重点基础研究发展计划(批准号:2009CB320404);长江学者和创新团队发展计划(批准号:IRT0852);国家高技术研究发展研究计划(批准号:2007AA01Z217);国家自然科学基金(批准号:60702057;60972047;60972048);高等学校学科创新引智计划(批准号:B08038)资助项目

摘　　要：针对MIMO链路ad hoc网络中已有传输调度算法未充分利用MIMO空间复用能力的问题,提出了一种新的传输调度算法.该算法通过考虑MIMO的多流接收能力而有效地减小了调度帧长,通过合理安排节点分配顺序使得节点分配的数据流比较平均,同时,该算法通过允许节点发送多个数据流而高效利用了MIMO的空间复用能力.推导分析了传输调度算法的通过量和时延性能,结果表明,与已有算法相比,采用文中算法可以提高网络的通过量,减小网络的平均时延和最大时延.Most reported works on transmission scheduling algorithm for multiple input multiple output （MIIVIU） link ad hoc networks do not fully exploit the spatial multiplexing potential inherent to multiple antennas system. In this paper, a novel transmission scheduling algorithm is proposed to further enhance the performance of MIMO link ad hoc networks. By utilizing the MIMO multi-stream reception capabilities and ordering the nodes＇ allocation sequence, the proposed algorithm can dramatically shorten the scheduling frame length and more evenly distribute the data streams allocated to the network nodes. Meanwhile, allowing the nodes to transmit multiple streams in a slot, the algorithm can fully exploit the MIMO spatial multiplexing potential. Additionally, we give the theoretical analysis to quantify the throughput and delay performance with respect to this scheme. Numerical results demonstrate that the proposed algorithm can efficiently enhance the network throughput and reduce the average and maximum delay.

关 键 词：多输入多输出 空间复用 多流接收 AD HOC网络 传输调度 

分 类 号：TN929.5[电子电信—通信与信息系统]