An Overheard-Based Relay-Assisted MAC Protocol Using Symbol Level Network Coding in Vehicular Networks

• Main Authors: Wei, Jhaoyen, 魏兆言
• Other Authors: Fangtsou, Chaotsong
• Format: Others
• Language: en_US
• Published: 2011
• Online Access: http://ndltd.ncl.edu.tw/handle/21263914763644113699

碩士 === 國立臺北大學 === 資訊管理研究所 === 99 === This thesis proposes an overheard-based relay-assisted MAC protocols to the moving vehicles by utilizing the dedicated short range communication (DSRC) over vehicular networks. This protocol can adapt in two communications modes which are one-hop and two-hop environments according to the highway traffic situation. When the highway traffic load is heavy, this system works at one-hop mode, and when the traffic is low, the service base station turns on the overheard-based two-hop relay mode that can extend the coverage of data service areas. The symbol-level network coding schemes in the relay communications mode can improve the network efficiency, raise transmitting success probability and increase throughout. This thesis also proposes the analytical models to analyze the performance of our protocols, and constructs the simulation experiments to validate and evaluate our proposed protocols.Compared with the traditional network coding protocol in vehicular networks, our proposed overheard-based relay-assisted MAC protocol can significantly increase the network efficiency and improve the network transmitting probability.