分层网络频谱资源分配方案

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.

Spectrum Resource Allocation Scheme in Tiered Networks

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.