异构无线网络混合接入与优化机制

Hybrid access and optimization mechanism in heterogeneous wireless sensor networks

在LTE与WSN异构无线网络架构中,有效降低信道接入时的碰撞概率从而提高网络容量吞吐量是影响异构无线网络性能的关键因素。文中建立混合接入模型及超帧结构,完成时分复用结构下的冲突避免,降低了WSN网络的能量消耗。通过时隙优化机制,解决当接入簇首的LTE UE数量变化频繁时竞争时隙配置不合理所导致的网络资源浪费。仿真结果表明,随着LTE UE的数量的增加,协作机制的性能优于传统的随机竞争接入机制,且协作机制的吞吐量性能呈现线性增长。当接入时隙相对充足簇资源利用趋向饱和时,接入概率和网络吞吐量性能均可保持稳定。

In LTE and WSN heterogeneous wireless network architecture,it effectively reduces the collision probability of channel access time so as to improve the network capacity,which is a key factor affecting the performance of heterogeneous wireless network. In this paper,a hybrid access model is established to reduce the energy consumption of WSN networks. By optimizing the time slot allocation,the waste of network resource is reduced. The simulation results show the effectiveness of the proposed model.