The failure of CSMA in emerging wireless network scenarios

Emma Fitzgerald; Björn Landfeldt

doi:10.1109/WD.2014.7020830

The failure of CSMA in emerging wireless network scenarios

Research output: Chapter in Book/Report/Conference proceeding › Paper in conference proceeding › peer-review

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.

Original language	English
Title of host publication	[Host publication title missing]
Pages	1-4
Number of pages	4
DOIs	https://doi.org/10.1109/WD.2014.7020830
Publication status	Published - 2014
Event	Wireless Days (WD), 2014 IFIP - Rio de Janeiro, Brazil Duration: 2014 Nov 12 → …

Conference

Conference	Wireless Days (WD), 2014 IFIP
Country/Territory	Brazil
City	Rio de Janeiro
Period	2014/11/12 → …

Subject classification (UKÄ)

Electrical Engineering, Electronic Engineering, Information Engineering

Free keywords

IEEE 802.11 Standards Multiaccess communication Propagation delay Protocols Throughput Wireless LAN Wireless communication

Access to Document

10.1109/WD.2014.7020830

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ELLIIT LU P01: WP2 Networking solutions
Landfeldt, B., Fitzgerald, E., Moradi, F., Karaca, M., Bastani, S., Safavi, M., Pioro, M. & Nyberg, C.
Project: Research
MESH-WISE: MESH-WISE - Self-organising MESH Networking with Heterogeneous Wireless Access
Landfeldt, B., Fitzgerald, E., Karaca, M. & Moradi, F.
European Commission - FP7
2013/03/01 → 2017/02/28
Project: Other

Cite this

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title = "The failure of CSMA in emerging wireless network scenarios",

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.",

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AB - 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.

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T2 - Wireless Days (WD), 2014 IFIP

Y2 - 12 November 2014

ER -

The failure of CSMA in emerging wireless network scenarios

Abstract

Conference

Subject classification (UKÄ)

Free keywords

Access to Document

Fingerprint

Projects

ELLIIT LU P01: WP2 Networking solutions

MESH-WISE: MESH-WISE - Self-organising MESH Networking with Heterogeneous Wireless Access

Cite this