Large Interference Range Collision Problems in Wireless Ad Hoc Network: Problems and Solutions

• Main Authors: Chau-Chieh Chang, 張朝傑
• Other Authors: Kuei-Ping Shih
• Format: Others
• Language: en_US
• Published: 2012
• Online Access: http://ndltd.ncl.edu.tw/handle/65331623552916431219

博士 === 淡江大學 === 資訊工程學系博士班 === 100 === The dissertation aims to avoid the Large Interference Range Collision problem, denoted as the LIRC problem, which is a notorious problem in contention-based MAC protocol for multi-hop wireless ad hoc networks. LIRC problem is derived from a famous problem, hidden terminal problem. The four way handshake is adopted to prevent hidden terminal problems from happening. However, it has been shown that the four way handshake cannot completely prevent hidden terminal problems because STAs which are out of transmission ranges of both the sender and the receiver are still capable of interfering with the receiver. Besides resolving the collision problem, decreasing the energy consumption and enhancing the network throughput are other critical issues of designing MAC protocols. As a result, the major focus of this dissertation proposes several mechanisms to solve the LIRC problem for three environments: (1) LIRC problem in power-control-based wireless ad hoc networks, (2) LIRC problem in non-power-control-based wireless ad hoc networks, and (3) LIRC problem in multi-rate supported with power control based wireless ad hoc networks. Simulation results show that the proposed mechanisms perform much better than the related works in terms of network throughput as well as the energy efficiency.