Research on Routing Technology Based on Seam

• 1、School of Electronic Engineering, Beijing University of Posts and Telecommunications,Beijing 100876

Abstract：Compared with the traditional ground network, satellite network has many advantages, such as wide coverage, no interference from ground and terrain factors, and long communication distance.In this paper.Under the structure of polar orbit Walker constellation, the research of satellite transmission has to face the problem of reverse seam. First, this paper proposes another SSHA (Soft Simple Handoff Algorithm) based on one to many transmission, which optimizes satellite packet loss in handover process. In the data transmission stage, we first use the traditional snapshot routing mode to establish the static topology structure, and then construct a new topology based on the cross slit switching strategy. At last, the shortest path algorithm is used to calculate the best transmission scheme at different time periods, as the final routing table. This way of routing can greatly reduce the time delay in the two sides of the reverse slot through the satellite transmission, and in the final simulation, it is found that the final packet loss rate is also equivalent to the traditional routing algorithm.

Keywords： Communication and information system low orbit satellite routing crossing seam