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The failure of CSMA in emerging wireless network scenarios

Fitzgerald, Emma LU and Landfeldt, Björn LU (2014) Wireless Days (WD), 2014 IFIP In [Host publication title missing] p.1-4
Abstract
The current family of 802.11 protocols are based on the Carrier Sense Multiple Access (CSMA) mechanism which is a simple and robust means of sharing a channel. However, two current trends in wireless networks point towards a situation where CSMA fails to perform better than pure random access solutions such as ALOHA. The first trend is the ever increasing raw data rate in each generation of 802.11 which is set to continue with the current 802.11ax standardisation. The second is the move towards smaller frames as end users increasingly use mobile devices instead of desktop computers. We show that as the ratio of propagation delay to packet transmission time increases, the performance of CSMA degrades correspondingly, to the point where... (More)
The current family of 802.11 protocols are based on the Carrier Sense Multiple Access (CSMA) mechanism which is a simple and robust means of sharing a channel. However, two current trends in wireless networks point towards a situation where CSMA fails to perform better than pure random access solutions such as ALOHA. The first trend is the ever increasing raw data rate in each generation of 802.11 which is set to continue with the current 802.11ax standardisation. The second is the move towards smaller frames as end users increasingly use mobile devices instead of desktop computers. We show that as the ratio of propagation delay to packet transmission time increases, the performance of CSMA degrades correspondingly, to the point where ALOHA outperforms CSMA. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
IEEE 802.11 Standards Multiaccess communication Propagation delay Protocols Throughput Wireless LAN Wireless communication
in
[Host publication title missing]
pages
4 pages
conference name
Wireless Days (WD), 2014 IFIP
external identifiers
  • Scopus:84937807008
DOI
10.1109/WD.2014.7020830
language
English
LU publication?
yes
id
79e5dd1e-80b2-46ca-988b-0965b5b93e38 (old id 5275507)
date added to LUP
2015-04-15 11:47:25
date last changed
2017-01-01 08:13:32
@inproceedings{79e5dd1e-80b2-46ca-988b-0965b5b93e38,
  abstract     = {The current family of 802.11 protocols are based on the Carrier Sense Multiple Access (CSMA) mechanism which is a simple and robust means of sharing a channel. However, two current trends in wireless networks point towards a situation where CSMA fails to perform better than pure random access solutions such as ALOHA. The first trend is the ever increasing raw data rate in each generation of 802.11 which is set to continue with the current 802.11ax standardisation. The second is the move towards smaller frames as end users increasingly use mobile devices instead of desktop computers. We show that as the ratio of propagation delay to packet transmission time increases, the performance of CSMA degrades correspondingly, to the point where ALOHA outperforms CSMA.},
  author       = {Fitzgerald, Emma and Landfeldt, Björn},
  booktitle    = {[Host publication title missing]},
  keyword      = {IEEE 802.11 Standards Multiaccess communication Propagation delay Protocols Throughput Wireless LAN Wireless communication},
  language     = {eng},
  pages        = {1--4},
  title        = {The failure of CSMA in emerging wireless network scenarios},
  url          = {http://dx.doi.org/10.1109/WD.2014.7020830},
  year         = {2014},
}