卫星网络综合加权信道分配策略  

Comprehensive Weighted Channel Allocation Strategy on Satellite Network

作　　者：蔡睿妍[1,2] CAI Rui-yan(Key Laboratory of Communication and Network,Dalian University,Dalian 116622,China;College of Information Engineering,Dalian University,Dalian 116622,China)

机构地区：[1]大连大学通信与网络重点实验室,辽宁大连116622 [2]大连大学信息工程学院,辽宁大连116622

出　　处：《大连大学学报》2020年第3期5-7,共3页Journal of Dalian University

摘　　要：在同步轨道(GEO)卫星为低轨(LEO)卫星分配信道的过程中,针对卫星信道误码率高、缓存容量小、星间可通时间有限等特点,提出了基于链路质量的综合加权信道分配策略。该策略首先考虑了GEO-LEO信道质量,提高了数据传输可靠性;然后设定了呼叫请求、信道强占的门限阈值约束条件,避免了频繁切换;最后通过卫星任务级别、卫星缓存和可通时间剩余量的权重分配确定卫星优先级,确保紧急卫星数据实时传输、高优先级卫星满足约束条件下强占信道传输。仿真结果表明,本文提出的策略有效地避免了卫星缓存溢出、数据丢失等现象,提高了网络信道利用率。In the process of GEO satellite allocating channels to LEO satellite,a comprehensive weighted channel allocation strategy is proposed in this paper to deal with high satellite channel error rate,low cache capacity and limited communication time between satellites.In this proposed strategy,firstly,the channel quality of LEO-GEO is considered to improve the reliability of data transmission.Secondly,the threshold constraints of the call request and channel preemption are set to avoiding frequent switching.Finally,based on the assignment of the weight of task priority,cache remaining amount and time remaining amount,the satellite priority is determined to guarantee the realtime transmission of emergency satellite data,and the high-priority satellite preempting channel when satisfying the constraints.The simulation results show that the proposed strategy effectively avoids satellite cache overflow and data loss,so this strategy improves network channel utilization.

关 键 词：信道分配 信道强占 优先级 信道利用率 

分 类 号：TN927.23[电子电信—通信与信息系统]