面向灾后电力应急通信系统的多AP协作功率控制技术

Power control technology based on AP cooperation for post-disaster power emergency communication system

为解决重大自然灾害发生后灾区电力系统的应急通信问题,近年来出现了利用Wi-Fi结合北斗技术的解决方案.如何增大系统覆盖能力、数据传输能力、用户承载能力,增强系统部署便宜性、灵活性是该应急通信系统面临的核心挑战.针对灾后电力应急通信系统上述核心需求,本研究基于第7代Wi-Fi多接入点(access point, AP)协作通信技术,提出一种协作式功率控制技术:增加无线接入过程中用户类型,并调整部分协议帧结构,具化相关字段用于指示新增用户类型;结合软频率复用技术设计了频谱资源分配算法和AP中心功率控制算法.仿真结果表明,与现有Wi-Fi系统多AP协作技术和软频率复用技术相比,所提算法有效提高了数据传输能力;与现有多AP协作技术相比,在用户承载能力相近条件下,可提高信号覆盖范围.

In order to solve the emergency communication problem of power system in disaster areas after major natural disasters, a solution using Wi-Fi combined with Beidou technology has emerged in recent years. It is the core challenges faced by the emergency communication system to increase the coverage capacity, data transmission capacity and user carrying capacity of the system, and to enhance the cheapness and flexibility of system deployment. To deal with this, a power control technology based on the 7 th generation Wi-Fi multi access point(AP) cooperative communication technology was proposed, and in order to increasing the user types in the process of wireless access, the structure of some protocol frames were adjusted and relevant fields were specified to indicate new user types. Combined with soft frequency multiplexing technology, the spectrum resource allocation algorithm and AP center power control algorithm were designed. The simulation results show that compared with the existing multi AP cooperation technology and soft frequency multiplexing technology of Wi-Fi system, the proposed algorithm effectively improves the data transmission ability, and compared with the existing multi AP cooperation technology, the signal coverage is improved under the condition of the user carrying capacity.