箭载无线传感器网络动态业务分配方法研究  

Research on Dynamic Traffic Allocation Method for Wireless Sensor Network in Rocket

作　　者：罗煜缤 李洪 周广铭 路娟 LUO Yubin;LI Hong;ZHOU Guangming;LU Juan(Beijing Institute of Astronautical Systems Engineering,Beijing 100076,China;China Aerospace Science and Technology Corporation,Beijing 100048,China)

机构地区：[1]北京宇航系统工程研究所,北京100076 [2]中国航天科技集团有限公司,北京100048

出　　处：《上海航天（中英文）》2022年第6期102-111,共10页Aerospace Shanghai（Chinese&English）

基　　金：航天科技集团公司自主研发项目。

摘　　要：无线传感器网络技术是新一代火箭测量系统中的关键技术之一,为实现箭上无线传感器节点业务动态变化场景下的信道资源无冲突分配,提出了一种基于优先级的动态业务分配方法——基于优先级的动态占空比节能位图辅助MAC协议(PD-EBMA)。主要思想是利用位图辅助适应业务量的动态变化、搭载预约的方式减少控制信息开销、背包算法提高信道利用率和降低时延,以及在流量较小时延不敏感的场景中使用动态占空比的思想降低能量开销。仿真结果表明:相比传统固定时隙的分配方式,PD-EBMA可以大幅提升网络灵活性,同时能耗和时延特性也得到显著改善。The wireless sensor network technology is one of the key technologies in the new generation rocket measurement system. In order to realize the conflict-free allocation of channel resources under the dynamic traffic scenario of wireless sensor nodes in rocket,this paper proposes a priority-based dynamic traffic allocation method,i.e.,the priority-based duty-cycle-enabled energy-efficient bit-map-assisted multiple access control(PD-EBMA). The main idea is to use the bit-map-assisted(BMA)method to adapt to the dynamic changes in traffic,to reduce the control overhead by piggybacking,to use the knapsack algorithm to improve the channel utilization rate and to reduce the time delay,and to use the dynamic duty cycle in scenarios where the traffic is small and the delay is not sensitive to reduce the energy costs. The simulation results show that,compared with the traditional fixed time slot allocation method,the proposed PD-EBMA greatly improves the network flexibility, the energy consumption, and the time delay characteristics significantly.

关 键 词：无线传感器网络 火箭测量系统 动态业务 位图辅助 搭载 背包算法 动态占空比 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]