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.
[1] T.S. Rappaport. Wireless Communications: Principles and Practice, 2nd
edition. pp. 157-165. New Jersey, Prentice-Hall, 2002.
[2] A. Kochut, A. Vasan, A. Shankar, and A. Agrawala. "Sniffing Out the
Correct Physical Layer Capture Model in 802.11b", in Proceedings of
IEEE International Conference on Network Protocols (ICNP), Berlin,
Germany, October 2004.
[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.
[4] Wireless LAN Medium Access Control (MAC) and Physical Layer
(PHY) Specifications, IEEE Std 802.11, 2007.
[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.
[7] X. Yang and N. H. Vaidya. "On the Physical Carrier Sense in Wireless
Ad Hoc Networks". In Proceedings of IEEE INFOCOM, 2005.
[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.
[11] J. Zhu, B. Metzler, X. Guo, Y. Liu, "Adaptive CSMA for Scalable
Network Capacity in High-Density WLAN: a Hardware Prototyping
Approach", in Proceedings of IEEE INFOCOM, pp 1-10, 2006.
[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.
[14] A.Akella, G.Judd, P. Steenkiste and S. Seshan. "Self Management in
Chaotic Wireless Deployments. In Proceedings of ACM MobiCom, 2005.
[15] B.Sadeghi, V.Kanodia, A.Sabharwal, and E.Knightly, "Opportunistic
Media Access for Multirate Ad Hoc Networks", In Proceedings of ACM
MobiCom, 2002, pp. 24-35.
[16] M. Cesana, D. Maniezzo, P. Bergamoy, M. Gerla, "Interference Aware
(IA) MAC: an Enhancement to IEEE 802.11b DCF", In Proceedings of
IEEE Vehicular Technology Conference, 2003.
[17] T. Nadeem, L. Ji, A. Agrawala, J. Agre, "Location Enhancement to IEEE
802.11 DCF", in Proceedings of IEEE INFOCOM, 2005.
[18] The Network Simulator ns-2, http://www.isi.edu/nsnam/ns/.
[19] Intersil HFA3863 DSSS Baseband Processor Datasheet (April 2000),
http://www.datasheets.org.uk/search.php?q=HFA3863&sType=part
[20] R Jain. The Art of Computer Systems Performance Analysis, John Wiley
and Sons, 1991.
[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.
[1] T.S. Rappaport. Wireless Communications: Principles and Practice, 2nd
edition. pp. 157-165. New Jersey, Prentice-Hall, 2002.
[2] A. Kochut, A. Vasan, A. Shankar, and A. Agrawala. "Sniffing Out the
Correct Physical Layer Capture Model in 802.11b", in Proceedings of
IEEE International Conference on Network Protocols (ICNP), Berlin,
Germany, October 2004.
[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.
[4] Wireless LAN Medium Access Control (MAC) and Physical Layer
(PHY) Specifications, IEEE Std 802.11, 2007.
[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.
[7] X. Yang and N. H. Vaidya. "On the Physical Carrier Sense in Wireless
Ad Hoc Networks". In Proceedings of IEEE INFOCOM, 2005.
[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.
[11] J. Zhu, B. Metzler, X. Guo, Y. Liu, "Adaptive CSMA for Scalable
Network Capacity in High-Density WLAN: a Hardware Prototyping
Approach", in Proceedings of IEEE INFOCOM, pp 1-10, 2006.
[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.
[14] A.Akella, G.Judd, P. Steenkiste and S. Seshan. "Self Management in
Chaotic Wireless Deployments. In Proceedings of ACM MobiCom, 2005.
[15] B.Sadeghi, V.Kanodia, A.Sabharwal, and E.Knightly, "Opportunistic
Media Access for Multirate Ad Hoc Networks", In Proceedings of ACM
MobiCom, 2002, pp. 24-35.
[16] M. Cesana, D. Maniezzo, P. Bergamoy, M. Gerla, "Interference Aware
(IA) MAC: an Enhancement to IEEE 802.11b DCF", In Proceedings of
IEEE Vehicular Technology Conference, 2003.
[17] T. Nadeem, L. Ji, A. Agrawala, J. Agre, "Location Enhancement to IEEE
802.11 DCF", in Proceedings of IEEE INFOCOM, 2005.
[18] The Network Simulator ns-2, http://www.isi.edu/nsnam/ns/.
[19] Intersil HFA3863 DSSS Baseband Processor Datasheet (April 2000),
http://www.datasheets.org.uk/search.php?q=HFA3863&sType=part
[20] R Jain. The Art of Computer Systems Performance Analysis, John Wiley
and Sons, 1991.
[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.
@article{"International Journal of Electrical, Electronic and Communication Sciences:56840", author = "Raymond J. Jayabal and Chiew Tong Lau", title = "Protocol Modifications for Improved Co-Channel Wireless LAN Goodput in Partitioned Spaces", abstract = "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.", keywords = "IEEE 802.11 Wireless LAN, spatial channel re-use,physical layer capture.", volume = "4", number = "12", pages = "1799-6", }
