Malicious Relay Detection in Cooperative Wireless Network

• Main Authors: Yu-KaiTseng, 曾裕凱
• Other Authors: Chih-Wen Chang
• Format: Others
• Language: en_US
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/00498967622057504195

碩士 === 國立成功大學 === 電腦與通信工程研究所 === 101 === Cooperative wireless network provides a new form of transmission which can achieve antenna diversity in MIMO system but with low complexity and cost. In a cooperative system, the cooperation between source and relay leads performance improvement become obvious. However, relay’s misbehavior can degrade the performance severely. There are many reasons could cause these misbehaviors. For instance, a relay node may stop forward the received message in order to saving his energy. In addition, a machine malfunction may also cause a malicious behavior. Therefore, a mechanism to detect the existence of misbehavior becomes necessary and important. In this paper, based on the conventional correlation-based (DB) method, we propose to apply the hard-decision values rather than the soft-decision ones for carrying out the misbehavior detection. Via simulation results, the proposed low complexity method using the hard-decision values is proved to improve the performance obtained by using CB.