摘要
LEO卫星网络因覆盖于地球表面的球面结构,高纬度地区轨道间链路较短,导致网络流量分布不均匀的现象。该文以分布式路由算法为基础,提出了基于横向转发权限和横向转发率两种应用于LEO卫星网络的全网流量均衡分布优化策略。前者能够对特定区域的流量进行调整,可作为流量实时调整策略;后者能够控制全局网络的流量分布情况,适用于网络流量分布的整体优化。通过仿真,验证了两种流量均衡策略能够使网络流量分布情况按照一定的均衡特点进行调整,从而实现网络流量优化的目的。
In low earth orbit（LEO） satellite networks, the length of inter-satellite links in high latitude regions are relatively shorter due to the spherical surface of the earth, this results in unbalanced traffic load distribution. In this paper, two load balancing strategies for distributed routing algorithms are proposed based on the horizontal transmitting priority and horizontal transmitting probability. The load balancing strategy based on the horizontal transmitting priority can be used as a real time strategy for its ability of flexibly adjusting the traffic load in a specific district. The horizontal transmitting probability based load balancing strategy is able to adjust the load distribution of the whole network, thus it can be used as a global optimization method. The simulation results prove that both of the strategies are capable of balancing the traffic load in LEO satellite networks.
出处
《电子科技大学学报》
EI
CAS
CSCD
北大核心
2014年第3期375-380,共6页
Journal of University of Electronic Science and Technology of China
基金
国家自然科学基金(61272518
61170275)
国家重大科技专项(2012ZX0303001-004)
关键词
流量均衡
LEO
路由算法
卫星通信系统
load balancing
LEO
routing algorithm
satellite communication systems
