基于TDMA的小卫星编队混合MAC协议  

A TDMA-based Combined MAC Protocol for the Small Satellite Formation System

作　　者：惠蕾放[1] 薛治纲 马伟[1] 杜长刚 孙汉汶[1] 

机构地区：[1]中国空间技术研究院西安分院,西安710000

出　　处：《空间电子技术》2016年第6期23-28,共6页Space Electronic Technology

摘　　要：为了实现小卫星编队成员对无线信道的共享,以TDMA为基础提出了一种将动态预约和竞争相结合的混合MAC协议。其中,动态预约段由中心节点控制,依据成员业务量的变化动态分配时隙,实现可靠的无冲突传输;在竞争段,编队成员通过竞争随机接入信道。这种混合的MAC协议既为编队成员提供了基本的传输时机,又为突发数据传输提供了接入信道的可能。仿真结果表明,这种混合方式在丢包率和传输时延上比固定的分时复用或竞争接入方式都有很大的优势,对小卫星编队及微纳卫星的组网具有一定的指导意义。In order to share the wireless channel for the small satellite formation system,a TDMA-based combined MACprotocol is proposed,which consists of dynamic reservation period and the contention period. In the dynamic reservation part,the slot occupancy is controlled by the central node according to the data amount;the members execute random access in thecompetitive part.The combined MAC protocol provides the basic transmission opportunity for the formation members,whileoffers chance for the bursting data.The simulation results show that,compared with the static TDMA and the competitivescheme,the proposed MAC protocol gains great efforts on the drop probability and transmission delay.This can be beneficialto the networking of small satellite formation and Micro-Nano satellites.

关 键 词：小卫星编队 动态预约分配 混合MAC协议 随机接入 

分 类 号：V474[航空宇航科学与技术—飞行器设计]