面向M2M通信的网络分层与窗口控制接入策略

Network layering and window control access strategyfor M2M communication

针对机器与机器(machine to machine, M2M)通信场景中设备接入成功率低的问题,提出在网络分层的基础上通过窗口控制接入的算法。首先通过网络分层优化算法对通信设备分组,建立骨干接入网络模型和接入子网模型,起到缓解接入冲突的作用;然后利用窗口控制和前导码复用的方法控制每个接入时隙的接入设备数量,解决接入资源紧张、接入成功率低的问题。仿真结果表明:所提出算法相较于对比算法,网络分层优化后的设备分组数减少了43%,设备接入成功率达到100%,设备的接入时延降低85%。

Aiming at the problem of low success rate of device access in machine-to-machine(M2M)communication scenarios,an algorithm for controlling access through windows based on network layering is proposed.Firstly,the communication equipment is grouped by the network hierarchical optimization algorithm,and the backbone access network model and access subnet model are established to alleviate the access conflict.Then,the number of access devices in each access slot is controlled by window control and preamble reuse,which solves the problems of limited access resources and low access success rate.The simulation results show that compared with the comparison algorithm,the number of device packets after network hierarchical optimization is reduced by 43%,the success rate of device access is 100%,and the access delay of device is reduced by 85%.