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Open Science Index

Commenced in January 2007 Frequency: Monthly Edition: International Publications Count: 29636

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Protocol Modifications for Improved Co-Channel Wireless LAN Goodput in Partitioned Spaces
Partitions can play a significant role in minimising cochannel interference of Wireless LANs by attenuating signals across room boundaries. This could pave the way towards higher density deployments in home and office environments through spatial channel reuse. Yet, due to protocol limitations, the latest incantation of IEEE 802.11 standard is still unable to take advantage of this fact: Despite having clearly adequate Signal to Interference Ratio (SIR) over co-channel neighbouring networks in other rooms, its goodput falls significantly lower than its maximum in the absence of cochannel interferers. In this paper, we describe how this situation can be remedied via modest modifications to the standard.
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[3] G. Sachin, K. Ramachandran, M. Gruteser, I. Seskar, J. Deng, "Methods for Restoring MAC Layer Fairness in IEEE 802.11 Networks with Physical Layer Capture", in Proceedings of the 2nd International Workshop on Multi-Hop Ad Hoc Networks: From Theory to Reality, pp. 7-14, 2006.
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[5] A. Muqattash and M. Krunz, "A Single-Channel Solution for Transmission Power Control in Wireless Ad Hoc Networks", In Proceedings of MobiHoc, 2004.
[6] J. Zhu, X. Guo, L. L. Yang, W.S. Conner, "Leveraging Spatial Reuse in 802.11 Mesh Networks with Enhanced Physical Carrier Sensing", In Proceedings of the IEEE International Conference on Communications (ICC), 2004.
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[8] A. Vasan, R. Ramjee, and T. Woo. "ECHOS: Enhanced Capacity 802.11 Hotspots". In Proceedings of IEEE INFOCOM, 2005.
[9] J. Fuemmeler, N. H. Vaidya, and V. V. Veeravalli. "Selecting Transmit Powers and Carrier Sense Thresholds for CSMA Protocols". Technical Report, Univ. of Illinois - Urbana Champaign, 2004.
[10] T.S. Kim, J.C. Hou, H. Lim, "Improving Spatial Reuse Through Tuning Transmit Power, Carrier Sense Threshold, and Data Rate in Multihop Wireless Networks". In Proceedings of the 12th Annual International Conference on Mobile Computing and Networking, pp. 366-377, 2006.
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[12] X. Yang, N. Vaidya, "Spatial Backoff Contention Resolution for Wireless Networks", in Proceedings of the 2nd IEEE Workshop on Wireless Mesh Networks, pp. 13-22, 2006.
[13] X. Yang, N. Vaidya, "A Spatial Backoff Algorithm Using the Joint Control of Carrier Sense Threshold and Transmission Rate", In Proceedings of the 4th Annual ACM Conference on Sensor, Mesh and Ad Hoc Communications and Networks (SECON), pp. 501-511, 2007.
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[21] C. Hu, H. Kim, and J. C. Hou. "An Analysis of the Binary Exponential Backoff Algorithm in Distributed MAC Protocols", Technical Report, Univ. of Illinois - Urbana Champaign, 2005.
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