面向大规模低地球轨道卫星网络的星间链路连接策略

TN92; 针对大规模低地球轨道(LEO)卫星网络,提出了2类新型星间链路(ISL)连接策略:Grid-V和Grid+,并对传统的Grid连接策略进行改进.所提策略充分利用了次邻轨和跨邻轨星间链路,Grid-V连接策略舍弃了Grid连接策略的轨内链路,利用次邻轨和跨邻轨的星间链路形成网络拓扑;Grid+连接策略在保留Grid连接策略中的星间链路基础上,允许卫星与同轨道或者次邻轨道卫星建立跨星连接.针对Walker-Delta星座构型的大规模LEO卫星网络,设计了基于所提星间链路连接策略的最短距离路由算法,并分别从几何拓扑和数据包层面对路由进行了系统级仿真,以评估各连接策略的性能.仿真结果表明,...

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Published in通信学报 Vol. 45; no. 8; pp. 100 - 109
Main Authors 燕锋, 聂浩俭, 夏玮玮, 沈连丰
Format Journal Article
LanguageChinese
Published 东南大学移动通信全国重点实验室,江苏 南京 210096 01.08.2024
Subjects
routing
路由
LEO satellite network
connection strategy
inter-satellite link
低地球轨道卫星网络
星间链路
连接策略
Online AccessGet full text
ISSN1000-436X
DOI10.11959/j.issn.1000-436x.2024119

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Abstract TN92; 针对大规模低地球轨道(LEO)卫星网络,提出了2类新型星间链路(ISL)连接策略:Grid-V和Grid+,并对传统的Grid连接策略进行改进.所提策略充分利用了次邻轨和跨邻轨星间链路,Grid-V连接策略舍弃了Grid连接策略的轨内链路,利用次邻轨和跨邻轨的星间链路形成网络拓扑;Grid+连接策略在保留Grid连接策略中的星间链路基础上,允许卫星与同轨道或者次邻轨道卫星建立跨星连接.针对Walker-Delta星座构型的大规模LEO卫星网络,设计了基于所提星间链路连接策略的最短距离路由算法,并分别从几何拓扑和数据包层面对路由进行了系统级仿真,以评估各连接策略的性能.仿真结果表明,在几何拓扑层面,所提策略可以有效减少平均路由跳数与路径切换次数;在数据包层面,所提策略在往返时延及抖动、路径占用率、平均吞吐量等方面具有更好的性能.
AbstractList TN92; 针对大规模低地球轨道(LEO)卫星网络,提出了2类新型星间链路(ISL)连接策略:Grid-V和Grid+,并对传统的Grid连接策略进行改进.所提策略充分利用了次邻轨和跨邻轨星间链路,Grid-V连接策略舍弃了Grid连接策略的轨内链路,利用次邻轨和跨邻轨的星间链路形成网络拓扑;Grid+连接策略在保留Grid连接策略中的星间链路基础上,允许卫星与同轨道或者次邻轨道卫星建立跨星连接.针对Walker-Delta星座构型的大规模LEO卫星网络,设计了基于所提星间链路连接策略的最短距离路由算法,并分别从几何拓扑和数据包层面对路由进行了系统级仿真,以评估各连接策略的性能.仿真结果表明,在几何拓扑层面,所提策略可以有效减少平均路由跳数与路径切换次数;在数据包层面,所提策略在往返时延及抖动、路径占用率、平均吞吐量等方面具有更好的性能.
Abstract_FL For large-scale low earth orbit(LEO)satellite networks,two new inter-satellite link(ISL)connection strate-gies named Grid-V and Grid+were proposed,which improved the traditional Grid connection strategy.The proposed strategies made full use of the ISL connected to adjacent and cross-adjacent orbits.The Grid-V connection strategy aban-doned the intra-orbit links of the Grid connection strategy and used ISL of the adjacent and cross-adjacent orbits to form the network topology.The Grid+connection strategy,while retaining the Grid connection strategy,allowed satellites to establish cross-satellite connections with satellites in the same orbit or the cross-adjacent orbits.For the large-scale LEO satellite network with a Walker-Delta constellation configuration,a shortest distance inter-satellite routing algorithm was designed based on the proposed ISL connection strategies,and system-level simulations were conducted from the per-spectives of geometric topology and packet respectively to evaluate the performance of each connection strategy.Simula-tion results show that,from the perspective of geometric topology,the proposed strategies can effectively reduce the aver-age number of routing hops and path switches.At the packet level,the proposed strategies exhibit better performance in terms of round-trip time and jitter,path occupation ratio,average throughput and so on.
Author 燕锋
聂浩俭
夏玮玮
沈连丰
AuthorAffiliation 东南大学移动通信全国重点实验室,江苏 南京 210096
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Author_FL YAN Feng
SHEN Lianfeng
XIA Weiwei
NIE Haojian
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Issue 8
Keywords routing
路由
LEO satellite network
connection strategy
inter-satellite link
低地球轨道卫星网络
星间链路
连接策略
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