分层网络频谱资源分配方案

Spectrum Resource Allocation Scheme in Tiered Networks

提出一种频谱资源分配方案,以提升分层毫微微小区网络的期望吞吐量.该方案为每层下行传输分配部分共享频谱资源,在单个用户期望吞吐量满足服务质量需求时,通过动态调整共享频谱资源分配比例,能够最大化网络期望吞吐量.为进一步获得每层下行传输的期望吞吐量,基于Nakagami-m衰落信道推导了每层用户下行接收信干噪比的累积分布函数.理论分析和仿真表明,该频谱资源分配方案能够有效提升网络期望吞吐量,但服务质量需求参数的增长限制了吞吐量的提升.

A spectrum resource allocation scheme for improving the expected network throughput in tiered femto-cell networks was proposed.The scheme distributed partial shared spectrum resource to downlink transmissions in macrocell and femtocells.With the limitation that expected single-user throughput meets service of quality（QoS） requirement,the expected network throughput was maximized by adjusting the allocation ratio of shared spectrum resource dynamically.Furthermore,to obtain the per-tier expected throughput of downlink transmissions,the cumulative distribution functions（CDF） of received signal to interference plus noise ratio（SINR） were derived with Nakagami-m fading channels.Both theoretical analysis and simulations indicate that the resource allocation scheme improves the expected network throughput,but the degree of improvement is limited by the increase of QoS requirement parameter.