Novel ISLs handover protection algorithm

The handover of inter satellite links (ISLs) may affect the performance of satellite network violently, so the handover links must be protected. In this paper, a novel ISLs handover protection (ISLHP) algorithm is proposed. To one of services, this algorithm can create the active path and backup paths at one time. And the costs of the active path and backup paths are the lowest. To make the handover links quick recovery, the local links protection mechanism is considered. However, this mechanism may be expensive in the additional network capacity needed, especially for satellite networks. By considering the predictive nature of the ISLs handover and the share restoration capacity of backup paths, the backup path number needed for one service and the backup resource which is idle can be decreased. So the network resource can be used efficiently in this algorithm. Correlative simulation indicates that this novel algorithm needs shorter recovery time, fewer back path number and additional cost.