基于协作通信异构网络链路质量提升技术研究

Research on link quality improvement technique based on cooperative communication in heterogeneous network

针对双层异构网络中跨层干扰、频繁越区切换等问题对Macrocell用户上行链路性能的不利影响,提出利用协作通信技术削弱其影响的方法,即利用Femtocell接入点充当中继节点,对接收到来自Macrocell用户的信息进行转发,通过Femtocell接入点和Macrocell用户的协作传输提升Macrocell用户上行链路中断概率和误比特率的性能,并同时分析了译码和直接两种转发方式下Macrocell用户性能。理论分析和仿真结果表明,基于Femtocell接入点的协作通信技术确实在Macrocell用户上行链路性能方面明显优于直接传输。

Due to the problems of cross-tier interference and handover frequently affected the uplink performance of Macrocell users adversely in two-tier heterogeneous network,this paper proposed a method that relying on cooperative communication technology to weaken the influence.It used the Femtocell access point as the relay node,which forwarded the information received by the Macrocell users,and improved the uplink outage probability and bit error rate of Macrocell users through cooperative transmission of MBS and Femtocell access points,and also analyzed the performance of Macrocell user in two forwarding modes,which was decode forwarding and direct forwarding.Theoretical analysis and simulation results show that the cooperative communication technology based on Femtocell access point is significantly superior to the direct transmission in terms of the uplink performance of Macrocell users.