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Issue No.05 - May (2013 vol.12)
pp: 1023-1036
Shiqiang Wang , Sch. of Inf. Sci. & Eng., Northeastern Univ., Shenyang, China
Qingyang Song , Sch. of Inf. Sci. & Eng., Northeastern Univ., Shenyang, China
Xingwei Wang , Sch. of Inf. Sci. & Eng., Northeastern Univ., Shenyang, China
A. Jamalipour , Sch. of Electr. & Inf. Eng., Univ. of Sydney, Sydney, NSW, Australia
Physical-layer network coding (PNC) is a promising approach for wireless networks. It allows nodes to transmit simultaneously. Due to the difficulties of scheduling simultaneous transmissions, existing works on PNC are based on simplified medium access control (MAC) protocols, which are not applicable to general multihop wireless networks, to the best of our knowledge. In this paper, we propose a distributed MAC protocol that supports PNC in multihop wireless networks. The proposed MAC protocol is based on the carrier sense multiple access (CSMA) strategy and can be regarded as an extension to the IEEE 802.11 MAC protocol. In the proposed protocol, each node collects information on the queue status of its neighboring nodes. When a node finds that there is an opportunity for some of its neighbors to perform PNC, it notifies its corresponding neighboring nodes and initiates the process of packet exchange using PNC, with the node itself as a relay. During the packet exchange process, the relay also works as a coordinator which coordinates the transmission of source nodes. Meanwhile, the proposed protocol is compatible with conventional network coding and conventional transmission schemes. Simulation results show that the proposed protocol is advantageous in various scenarios of wireless applications.
Relays, Media Access Protocol, Computer numerical control, Peer to peer computing, Wireless networks, Synchronization, wireless networks, Carrier sense multiple access (CSMA), IEEE 802.11, medium access control (MAC), physical-layer network coding (PNC)
Shiqiang Wang, Qingyang Song, Xingwei Wang, A. Jamalipour, "Distributed MAC Protocol Supporting Physical-Layer Network Coding", IEEE Transactions on Mobile Computing, vol.12, no. 5, pp. 1023-1036, May 2013, doi:10.1109/TMC.2012.69
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