机会网络中基于节点探测的能量均衡机制

Energy Balance Mechanism Based on Node Detection in Opportunistic Networks

机会网络中节点在转发数据包之前,需要通过探测发现与自己发生接触的其它节点,而探测过程需要消耗能量,探测周期与探测到的接触数间有一种均衡关系.针对这种关系提出一种在机会网络中基于节点探测的能量均衡机制,该机制首先通过泊松分布模型建模得到有效探测概率,然后根据提出的表达式得到有效探测接触数,最后通过分析探测周期与有效探测接触数之间的关系,找到不同情况下探测周期与探测有效性的均衡点.结果表明,可以根据节点所处的环境来设置探测周期,达到节能的目的.

The node in opportunistic networks need to discover other nodes that would contact itself through probing before forward packets. The detection process consumes energy and there is a balance between probing cycle and the nodes will contact. This paper proposed a node detection mechanism based on energy balance in opportunistic networks according to this relationship. This mechanism will first get the effective detection probability by the Poisson Distribution Model,then get the contact number of the effective detection based on the expression proposed. Finally, we can get the equilibrium point between the detection period and the detection validity under different circumstances by analyzing the relationship between the detection period and the effective contact number. The results showed that the detection period cart be set according to the environment in which nodes to achieve energy-saving purposes.