tailieunhanh - PHY-MAC cross layer cooperative protocol supporting physical layer network coding

This paper propose a PHY-MAC crosslayer cooperative protocol which can support PNC for multi-rate cooperative wireless networks with bidirectional traffic. The design objective of the proposed protocol is to increase the transmission reliability, throughput, and energy efficiency, as well as to reduce the transmission delay. | VNU Journal of Science: Comp. Science & Com. Eng., Vol. 31, No. 2 (2015) 29–43 PHY-MAC Cross-Layer Cooperative Protocol Supporting Physical-Layer Network Coding Quang-Trung Hoang*, Xuan Nam Tran Le Quy Don Technical University, Hanoi, Viet Nam Abstract Cooperative communication has known as an effective solution to deal with the channel fading as well as to improve the network performances. Further, by combining the cooperative relaying technique with the physicallayer network coding (PNC), cooperative networks will obtain more benefits to improve the throughput and network resource utilization. In order to leverage these benefits, in this paper, we propose a PHY-MAC crosslayer cooperative protocol which can support PNC for multi-rate cooperative wireless networks with bidirectional traffic. The design objective of the proposed protocol is to increase the transmission reliability, throughput, and energy efficiency, as well as to reduce the transmission delay. Simulation results show that the proposed protocol outperforms the previous cooperative protocol as well as the traditional protocol in terms of network performance. c 2015 Published by VNU Journal of Sciences. Manuscript communication: received 01 June 2015, revised 20 June 2015, accepted 25 June 2015 Correspondence: Xuan Nam Tran, namtx@ Keywords: Cross-Layer MAC, Cooperative MAC, Physical-Layer Network Coding, Alamouti-DSTBC. 1. Introduction Nowadays, the increase in the number of people using mobile devices has leveraged the development of wireless networks. With the increased requirements in the quality of service for various applications, technical solutions need to be developed to improve the network performance such as the channel capacity, end-to-end throughput, transmission reliability, energy efficiency, and the network coverage. Cooperative transmission has been known as an effective method to exploit spatial diversity to enhance the quality of wireless channels at the physical layer.