基于D2D与WLAN共享的分布式频谱配置方案研究

The research on a distributed spectrum configuration scheme for D2D sharing with WLAN

为了有效地解决现有蜂窝资源紧缺问题,实现蜂窝频谱资源及ISM频谱资源的统筹调度,从而优化频谱资源配置,文中构建出LTE D2D系统与WLAN系统共存的场景模型。通过使用虚拟的扩展的CSMA/CA信道接入方法,提出一种分布式的D2D簇频谱争用及优化的信令机制,并结合单播业务场景对所提机制进行验证分析。仿真研究表明,新型分布式频谱优化机制可实现蜂窝频谱资源的节约利用,其平均吞吐量的性能增益都明显优于传统的WLAN通信模式,有效地提高了频谱资源利用率。

In order to solve the problem that the shortage of existing cellular resources effectively, and achieve the whole scheduling between cellular spectrum resources and ISM spectrum resources to optimize spectrum allocation of resources. In this paper, we present LTE D2 D systems and WLAN systems coexist scene model. Based on a virtual extension of CSMA / CA channel access method, we define and describe a signaling mechanism which is a distributed D2 D cluster spectrum contention and optimization, and combine with unicast scenario to analysis this mechanism. Simulation studies demonstrate that the new distributed spectrum optimization mechanism enables cellular spectrum resources to be utilized economically, the average throughput performance gain significantly better than traditional WLAN communication mode obviously, and it improves the spectrum resources efficiency.