关键词: 机会网络, 路由协议, 辅助信息, 社会性

Abstract: Opportunistic routing protocols utilize the auxiliary-information to make routing decisions, however, the acquisition process of the auxiliary-information among nodes is in an epidemic fashion, which consumes more network resources. Motivated by this problem, this paper proposes a hierarchical auxiliary-information acquisition mechanism to efficiently reduce the information exchange times among nodes. Firstly, nodes which are neighbors exchange information, so as to have a faster update. Secondly, in order to have a higher network coverage rate of auxiliary-information, the nodes are divided into the social nodes and ordinary nodes, and the acquisition of auxiliary-information mainly occurs between the two types of nodes to assure the higher network coverage rate. Selectively sharing information can significantly reduce the information acquisition times between nodes. The experimental     results demonstrate that the exchange times of auxiliary-information acquisition has reduced by about 80%, significantly improving the routing protocol performance.

Key words:  opportunistic network, routing protocols, auxiliary-information, social property