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The failure of CSMA in emerging wireless network scenarios

In English

Författare

Summary, in English

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.

Publiceringsår

2014

Språk

Engelska

Sidor

1-4

Publikation/Tidskrift/Serie

[Host publication title missing]

Dokumenttyp

Konferensbidrag

Ämne

  • Electrical Engineering, Electronic Engineering, Information Engineering

Nyckelord

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

Conference name

Wireless Days (WD), 2014 IFIP

Conference date

2014-11-12

Conference place

Rio de Janeiro, Brazil

Status

Published

Projekt

  • MESH-WISE - Self-organising MESH Networking with Heterogeneous Wireless Access
  • ELLIIT LU P01: WP2 Networking solutions

Forskningsgrupp

  • Networking