Delay Analysis of Single-hop Communication in Wireless SensorNetworks with Mobile Sink

In wireless sensor networks where the sink is mobile, a node can conveniently hold an information packet until the sink comes closer. This allows to both decrease the number of wireless hops required to deliver the information to the sink and reduce energy consumption. Thus, mobility of sinks can be an effective way to minimize energy consumption. However, with the increasing energy efficiency in sensor networks, the source-to-sink delay in data dissemination may be not acceptable for the application. In this paper we propose an analytical model to calculate the source-to-sink delay in single-hop wireless sensor networks. And the model can easily extend to evaluate the data dissemination to mobile sink in multihop wireless sensor networks. We verify the model through simulation and change the parameters to evaluate their effects. Numerical results show that the analytical framework of source-to-sink delay is accurate.