关键词: 低轨卫星, 服务质量, 路由, 切换, 星际链路

Abstract:

The rerouting strategy in the low earth orbit (LEO) quality of service (QoS) satellite networks was proposed to accommodate as much QoS traffic as possible. The rerouting means to select an already accepted flow and replace its established path with some other path in order to accept a newly arriving transmission request which can not be accepted without doing so. The feasibility of the rerouting strategy in the LEO QoS satellite networks was verified by the computer simulation. The results illustrate that the rerouting strategy can raise the utilization of network resources effectively, on the other hand, it would cause a higher connection handover frequency. For solving this problem, a new approach to select the accepted flow for rerouting according to the characteristics of LEO constellation network topology was proposed. The simulation results show that the proposed approach improves the performance of the connection handover frequency.

Key words: low earth orbit satellite, quality of service, routing, handover, interSatellte links