Abstract:

The reasonable deployment of the quantity and location of multisink in Wireless Sensor Networks (WSNs) is efficient to prolong the network lifetime and control the network cost. This paper establishes network lifetime and cost model based on the WSNs with random distribution. Furthermore, the expression of the optimal number of sink nodes is deduced by using the ratio of network lifetime to cost (RLC), which makes a tradeoff between the network lifetime and the deployment cost. A placement algorithm named RDF (Region Density First) is also proposed which makes us to determine the place of the sink nodes easily. These methods are validated by a simulation test and the results show that they are effective to prolong the network lifetime and decrease the deployment cost.

Key words: wireless sensor networks;multisink;network lifetime;network cost