Nodes Packet Forwarding Strategies Game Modelling Of Wireless Sensor Network

Wireless Sensor Network (WSN) which consists of a collection of wireless nodes, dynamically create a self-organizing network has a wide application future. With the rapid development of sensor networks, Designed for wireless sensor network reasonable communication protocol, and ensured mutual cooperation among sensor nodes to improve network throughput and performance was also one of the difficulties in the field of wireless sensor network.This paper analyzed the wireless sensor network architecture, the selfish behavior of wireless sensor network nodes would seriously affect the overall performance of the available network, and by making the Markov matrix Game relationship between nodes,we set up a sensor network node packet forwarding strategy of Repeated Game Model. By the repeated game among nodes and broadcasting the monitored nodes'utility change, the framework could detect the selfish behavior in the network in time,and the rational nodes take up the cooperative strategy,which greatly reduces the. possibility of node departure from the collaboration.by the introduction of punishment and reputation mechanism. Simulation results show that the implementation of the punishment mechanism and adjust the packet forwarding probability at any time and hops, can greatly enhance the mutual cooperation between nodes to ensure connectivity of network. Algorithm simulation show that the proposed model is effective, and infinitely repeated game achieved Nash equilibrium and can effectively promote voluntary cooperation with the node. The main research works are as follows:1. Introduce the status of domestic and overseas research in information wireless sensor network packet forwarding strategy technology briefly, and put forward the research background, the significance, and main contents.2. Analyzed the structural system of wireless sensor network and nodes performance research methods, learn from Ad-hoc network system, prepared for the future research in sensor networks for packet forwarding strategy game model.3. Analyzed the Ad hoc and sensor networks Cooperation Mechanism, the establishment of price, cost, forwarding probability, history decision, game strategy relationship, derived the relationships between various factors.4. Analysis of the selfish behavior of wireless sensor network nodes would seriously affect the overall performance of the available network,and established the expected revenue function network, and show that the repeated game model achieved mixed strategy Nash Equilibrium and promoted the nodes mutual cooperation.5. Simulation results show that the nodes in the case of cooperation and non-cooperative network throughput performance improved,In the current optimal packet forwarding probability, nodes do not want to deviate from the strategy and cooperation enhanced, the overall effectiveness of the network close to the ideal state.