一种卫星通信网分簇管理的簇首备份机制

A Cluster Head Backup Mechanism of Clustered Management in Satellite Communication Network

针对卫星网络分层分簇的管理结构易在空间段产生中心节点故障,导致网络管理安全性能下降的问题,在分析星簇簇首在空间中安全性需求的基础上,提出了能够实现簇首快速切换的备份机制和相应的基于优先级的主备簇首选举算法,该算法将星簇内部成员间可达性、时延、链路可靠性等因素进行合理量化考虑,经过卫星优先级计算和星簇内协商选举,生成簇首和备份簇首。仿真结果表明,该机制能够在极短时间内替换故障簇首,恢复星簇工作,同时保证簇首对星簇管理开销最小。

In view of the problem that the security of network management is easily decreased by the center node troubles in the traditional satellite network management mechanism based on hierarchical-clustering structure,a novel scheme is proposed to meet the needs of the security cluster head,which supports the fast switching between formal and backup cluster head,and then a relevant new priority-based selecting algorithm is proposed for the formal and backup head selecting the formal cluster head and the backup clus-ter head through cluster members negotiating and priority calculating in consideration of communication ingredients comprehensively in satellite cluster such as accessibility,delay and reliability.The results of simulation indicate that the scheme can not only replace the failure cluster head and recover the cluster in very short time,but also minimize management cost of the cluster head.