MAC-PHY Cross-Layer for High Channel Capacity of Multiple-Hop MIMO Relay System

• 作者: Chika Sugimoto Pham Thanh Hiep Ryuji Kohno
• 来源期刊: 通讯与网络(英文)
• 学科: 工学
• 关键词: Multiple-Hop Relays SYSTEM AMPLIFY-AND-FORWARD OPTIMIZATION Distance OPTIMIZATION Transmit Power MAC Layer Protocol Infinite Antenna Number
• 年，卷（期）: 2012,（2）
• 页码范围: 129-138
• 页数: 10页
• 分类号: TN92

摘要

For the high end-to-end channel capacity, the amplify-and-forward scheme multiple-hop MIMO relays system is considered. The distance between each transceiver is optimized to prevent some relays from being the bottleneck and guarantee the high end-to-end channel capacity. However, in some cases, the location of relays can’t be set at the desired location, the transmit power of each relay should be optimized. Additionally, in order to achieve the higher end-to-end channel capacity, the distance and the transmit power are optimized simultaneously. We propose the Markov Chain Monte Carlo method to optimize both the distance and the transmit power in complex propagation environments. Moreover, when the system has no control over transmission of each relay, the interference signal is presented and the performance of system is deteriorated. The general protocol of control transmission for each relay on the MAC layer is analyzed and compared to the Carrier Sense Multiple Access-Collision Avoidance protocol. According to the number of relays, the Mac layer protocol for the highest end-to-end channel capacity is changed. We also analyze the end-to-end channel capacity when the number of antennas and relays tends to infinity.