社会化机会网络中节点归属位置感知的路由机制

机会网络中的节点具有较强的社会属性,其对于机会网络路由机制的设计至关重要.在充分利用节点社会属性的基础上,提出一种节点归属位置感知的路由机制.社区中心节点通过相互协商的方式合理地为节点动态分配地址,以准确反映节点的相对地理位置.通过计算节点地址之间的海明距离,合理地确定了节点之间的相邻程度.在节点运动过程中,通过检测数据分组的目的节点与相遇节点是否归属于同一社区,而决策执行社区间路由或社区内路由,同时根据所相遇节点与目的节点的相邻程度,合理地为数据分组选择中继节点,有效地完成数据分组的转发.结果表明,所提出的机制能够提高数据分组成功投递率并降低传输开销.

Node home location aware routing mechanism for social opportunistic networks

The nodes have strong social correlations in Opportunistic Networks, which are crucial to the design of routing mechanisms. By exploiting the social attributes of node, a node home location aware routing mechanism is proposed. Firstly, the relative geographic position is accurately indicated by the dynamically assigned node addresses according to the negotiation between community central nodes. Secondly, the relative distance between nodes can be reasonably determined according to the hamming distance. Lastly, the address assignment can be accomplished in a distributed manner to further provide decision-making basis for selecting suitable inter-cluster and intra-cluster routing strategies. Meanwhile, the address distance from the encountered node to the sink is considered to reasonably select relay nodes to successfully forward packets. Numerical results show that the proposed mechanism can dramatically improve the packet delivery ratio while reducing the transmission overhead.