Token Exchange Mechanism through Bayesian Game for Encouraging Device-to-Device Relaying in Cellular Networks

• Main Authors: Chien-Wei Lai, 賴建維
• Other Authors: Wei -Kuang Lai
• Format: Others
• Language: zh-TW
• Published: 2018
• Online Access: http://ndltd.ncl.edu.tw/handle/b2uv6p

碩士 === 國立中山大學 === 資訊工程學系研究所 === 107 === We consider D2D-enabled network where there are multiple devices owned by selfish users, which can help each other improve their utility by means of relaying. We propose a token-based incentive scheme which users can choose either earning a token by relay other use’s data, consuming a token by asking others’ helping, or keeping it’s token for future. By circulation of tokens, users have more reasonable motivation to utilize D2D relaying service. Different from existing researches, besides remaining tokens and power, we still take position, move pattern and past behavior of users into consideration. We divide the signal strength of cellular user into three levels, strong, medium and weak, which affect a user’s gauge of buying and selling tokens. A user always has strong signal does not want to relay data because tokens are useless for it, while a user suffers bad signal wants to consume lots of tokens for improvement of signal. If a user’s signal is getting strong or weak, it can keep or earn some tokens early for its long-term utility according to estimation of other users’ past decision. We describe the users as bayesian game and the belief of users in the game is decided according to the past token exchange. By comparison of expected interim utility of predictable future and expected interim utility in the moment, a user can do better decision to get better long-term utility. Our simulation results including user’s speed, remaining power, and mobility pattern, etc. The results have shown that users can have better long-term throughput by taking other users’ past decision into consideration while doing token exchange.