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在传统宏基站无缝覆盖的基础上引入新的低功率节点构成双层网络,可以实现高速数据传输.双层网络的宏基站和低功率节点复用相同频谱实现高速数据服务的同时,也会产生严重的干扰,成为制约网络性能提升的关键问题.针对双层网络的上行链路干扰进行了建模与分析.采用泊松点过程建模无线环境中干扰节点的随机分布,考虑了路径损耗和阴影衰落的影响,并通过中断概率表征和分析了干扰对宏用户性能的影响.通过仿真分析了传播特性、微用户密度、微用户发射功率与中断概率的关系.
Based on the seamless coverage of the traditional macro base station, a new low power node is introduced to form a double layer network for high-speed data transmission. While the macro base station and the low-power node in the dual-layer network multiplex the same spectrum for high-speed data service, Which cause serious interference and become the key problem that restricts the improvement of the network performance.Aiming at the uplink interference of the double-layer network, we model and analyze the uplink interference.The Poisson point process is used to model the random distribution of the interference nodes in the wireless environment, considering the path loss And the effect of shadow fading, the influence of interference on macro user performance is characterized and analyzed by the outage probability.The relationship between propagation characteristics, micro-user density, micro-user transmission power and outage probability is analyzed through simulation.