Acta Metallurgica Sinica(English letters) ›› 2009, Vol. 16 ›› Issue (5): 8-13.doi: 10.1016/S1005-8885(08)60261-7

• Wireless • 上一篇    下一篇

Cooperative HARQ protocol and diversity analysis of systems with multiple incremental relays

范斌,王文博,林懿诚,郑侃   

  1. Wireless Signal Processing and Network Lab, Key Laboratory of Universal Wireless Communication, Ministry of Education,
    Beijing University of Posts and Telecommunications, Beijing 100876, China
  • 收稿日期:2008-12-23 修回日期:1900-01-01 出版日期:2009-10-30
  • 通讯作者: 范斌

Cooperative HARQ protocol and diversity analysis of systems with multiple incremental relays

FAN Bin ,WANG Wen-bo, LIN Yi-cheng, ZHENG Kan   

  1. Wireless Signal Processing and Network Lab, Key Laboratory of Universal Wireless Communication, Ministry of Education,
    Beijing University of Posts and Telecommunications, Beijing 100876, China
  • Received:2008-12-23 Revised:1900-01-01 Online:2009-10-30
  • Contact: FAN Bin

摘要:

Wireless networks contain an inherent distributed spatial diversity that can be exploited by relays. Relay networks can take advantage of the broadcast-oriented nature of wireless transmission, but require more radio resource to transmit data for their multi-hop traits. Fortunately, incremental relaying technique, which can choose direct or multi-hop transmission adaptively, can efficiently utilize resource. In this article, the incremental transmission with amplify-and-forward (AF) relays is focused on. A practical hybrid-automatic retransmission request (HARQ) protocol is designed, and the related optimal relay selection strategy is proposed. To analyze the cooperative diversity of system with the proposed protocol, the capacity lower bound is deduced. Simulation and analytical results indicate that by adopting the optimal relay selection strategy, the system with the proposed HARQ protocol can achieve an order of cooperative diversity that equals the aggregated number of the relay and source nodes.

关键词:

cooperative;HARQ,;AF,;incremental;relay,;diversity;gain

Abstract:

Wireless networks contain an inherent distributed spatial diversity that can be exploited by relays. Relay networks can take advantage of the broadcast-oriented nature of wireless transmission, but require more radio resource to transmit data for their multi-hop traits. Fortunately, incremental relaying technique, which can choose direct or multi-hop transmission adaptively, can efficiently utilize resource. In this article, the incremental transmission with amplify-and-forward (AF) relays is focused on. A practical hybrid-automatic retransmission request (HARQ) protocol is designed, and the related optimal relay selection strategy is proposed. To analyze the cooperative diversity of system with the proposed protocol, the capacity lower bound is deduced. Simulation and analytical results indicate that by adopting the optimal relay selection strategy, the system with the proposed HARQ protocol can achieve an order of cooperative diversity that equals the aggregated number of the relay and source nodes.

Key words:

cooperative HARQ;AF;incremental relay;diversity gain