Relay Node Selection Algorithm for Cooperative Communications in Wireless Networks

Authors: Sunmyeng Kim

Abstract:

IEEE 802.11a/b/g standards support multiple transmission rates. Even though the use of multiple transmission rates increase the WLAN capacity, this feature leads to the performance anomaly problem. Cooperative communication was introduced to relieve the performance anomaly problem. Data packets are delivered to the destination much faster through a relay node with high rate than through direct transmission to the destination at low rate. In the legacy cooperative protocols, a source node chooses a relay node only based on the transmission rate. Therefore, they are not so feasible in multi-flow environments since they do not consider the effect of other flows. To alleviate the effect, we propose a new relay node selection algorithm based on the transmission rate and channel contention level. Performance evaluation is conducted using simulation, and shows that the proposed protocol significantly outperforms the previous protocol in terms of throughput and delay.

Keywords: Cooperative communications, MAC protocol, Relay node, WLAN.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1091428

References:

[1] M. Heusse, F. Rousseau, G. Berger-Sabbatel, and A. Duda, "Performance Anomaly of 802.11b,” in Proc. IEEE INFOCOM, vol. 2, pp.836-843, 2003.
[2] 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, February 2007.
[3] 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, December 2009.
[4] H. Zhu and G. Cao, "rDCF: a Relay-Enabled Medium Access Control Protocol for Wireless ad Hoc Networks,” IEEE Transactions on Mobile Computing, vol. 5, pp. 1201-1214, September 2006.
[5] W.-S. Lim, D.-W.Kim, and Y.-J. Suh, "PR-MAC: A Practical Approach for Exploiting Relay Transmissions in Multi-Rate WLANs,” IEEE Transactions on Wireless Communications, vol. 9, no. 1, pp.66-71, January 2010.
[6] B. Zhang and X. Jia, "Multi-hop Collaborative Relay Networks with Consideration of Contention Overhead of Relay Nodes in IEEE 802.11 DCF,” IEEE Transactions on Communications, vol. 61, no. 2, pp. 532-540, February 2013.
[7] J. Liu, W. Wang, Z. Zheng, X. Zhang, C. Chen, and X. Shen, "Lifetime Extended Cooperative MAC Protocol for Wireless LANs,” in Proc. IEEE GLOBECOM, pp. 5476-5481, December 2012.
[8] S. Nischal and V. Sharma, "A Cooperative ARQ Scheme for Infrastructure WLANs,” in Proc. IEEE WCNC, pp. 428-433, April 2013.
[9] X. Zhang, L. Guo, and X. Wei, "An Energy-Balanced Cooperative MAC Protocol Based On Opportunistic Relaying in MANETs,” Computers & Electrical Engineering, vol. 39, no. 6, pp. 1894-1904, August 2013.