Data Rate Based Grouping Scheme for Cooperative Communications in Wireless LANs
Creators
Description
IEEE 802.11a/b/g standards provide multiple
transmission rates, which can be changed dynamically according to the
channel condition. Cooperative communications were introduced to
improve the overall performance of wireless LANs with the help of
relay nodes with higher transmission rates. The cooperative
communications are based on the fact that the transmission is much
faster when sending data packets to a destination node through a relay
node with higher transmission rate, rather than sending data directly to
the destination node at low transmission rate. To apply the cooperative
communications in wireless LAN, several MAC protocols have been
proposed. Some of them can result in collisions among relay nodes in a
dense network. In order to solve this problem, we propose a new
protocol. Relay nodes are grouped based on their transmission rates.
And then, relay nodes only in the highest group try to get channel
access. Performance evaluation is conducted using simulation, and
shows that the proposed protocol significantly outperforms the
previous protocol in terms of throughput and collision probability.
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Additional details
References
- P. Liu, Z. Tao, S. Narayanan, T. Korakis, and S. S. Panwar, "CoopMAC: a cooperative MAC for wireless LANs," IEEE Journal on Selected Areas in Communications, vol. 25, no. 2, pp. 340-354, Feb. 2007.
- T. Guo and R. Carrasco, "CRBAR: cooperative relay-based auto rate MAC for multi-rate wireless networks," IEEE Transactions on Wireless Communications, vol. 8, no. 12, pp. 5938-5947, Dec. 2009.
- Cooperative MAC Design in Multi-hop Wireless Networks: Part I: When Source and Destination are within the Transmission Range of Each Other
- X. He and F. Y. Li, "Optimization of the Relay Selection Scheme in Cooperative Retransmission Networks," IEEE VTC Spring 2011, pp. 1-5, May 2011.
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- K. Lu, S. Fu, and Y. Qian, "Increasing the throughput of wireless LANs via cooperative retransmission," IEEE GLOBECOM '07, pp. 5231-5235, Nov. 2007.