组播/单播OFDMA系统中资源分配算法研究  

Study on resource allocation algorithm for multicast/unicast OFDMA system

作　　者：尤琛辉[1] 魏克俊 魏伟[3] 

机构地区：[1]江苏省科学技术厅 [2]73685部队 [3]南京军区通信网络技术管理中心

出　　处：《电路与系统学报》2012年第5期109-114,共6页Journal of Circuits and Systems

摘　　要：本文研究了组播/单播OFDMA系统中的无线资源分配,为了在满足组播速率需求的条件下最大化单播用户的总速率的优化目标,提出两种资源分配算法。分别采用代价函数和适度度量作为依据为组播用户选择子载波,剩余资源按照最大吞吐量准则分配给单播用户。仿真表明,两种算法均能够满足组播速率需求,且获得的单播用户的总速率接近理论最大值。In order to maximize the whole rate of unicast users with the constraint of satisfying the multiast rate requirement, two novel resource allocation algorithms in multicast/unicast coexisting OFDMA system are proposed in this paper. The two proposed algorithms use cost function and fitness metric as the foundation to select sub carriers for multicast users respectively, then the left resource will be allocated to unicast users according to the Max Throughput criteria. The simulation results show that the two algorithms can not only meet the multicast rate demand, the achieved whole rate of unicast users is also close to the optimal theoretical value.

关 键 词：组播/单播 OFDMA系统 资源分配 

分 类 号：TN925[电子电信—通信与信息系统]