Research On Node Incentive Mechanism For Cooperation In Wireless Ubiquitous Environment

In wireless ubiquitous environment, the cooperation of multi-network and multi-terminal can provide high-rate service experience for users, ad-hoc based intelligent connection among terminals can achieve traffic migration and load balancing among networks. However, some terminal nodes often exhibit non-cooperative and selfish features in relaying process, which seriously affect the terminal cooperation. Therefore, it is necessary to study rational and effective incentive mechanism to promote terminal cooperation. The main works are as follows:Firstly, The theory of wireless ubiquitous environment is summarized in this thesis, the selfish behavior of nodes in relaying process and the current major node cooperative incentive mechanisms are emphasized subsequently.Secondly, Based on the " single service required node- multi-relaying nodes " communicative network scene, a kind of node cooperative incentive algorithm is proposed with non-cooperative game theory. Total revenue function models for the requesting service node and the relaying node are established respectively. The mathematical derivation proves the existence of Nash equilibrium of this non-cooperative game model and the simulation results show the effectiveness of the proposed algorithm.Finally, Based on cooperative game theory and virtual currency incentive mechanism, a kind of node cooperative incentive algorithm is proposed. The allied cost function is established with power,signal to interference ratio and other factors in wireless multi-hop environment. The best cooperative relaying alliance for the service required node can be selected according to the principle of maximizing the total allied revenue. The Shapley value method is further adopted to allocate the optimal allied utility, and the simulation results show the rationality and effectiveness of the proposed algorithm.