When two-hop meets VoFi

Sathya Narayanan, Shivendra S. Panwar

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In a paper titled Can I add a VoIP call?[1], the authors calculate the maximum number of VoIP calls that a WiFi (VoFi) network can support. In this paper we extend their analysis to calculate the maximum number of VoFi calls when two-hop forwarding is used in order to avoid rate adaptation at nodes with reduced received signal strength. We calculate this number for different combinations of data rates for slow node transmissions and potential two-hop transmissions. These calculations demonstrate that the use of two-hop forwarding increases the maximum number of VoIP calls in a multi-rate 802.11b network. We validate the analysis by means of simulation of G711 codec sources in a 802.11b network. Even though the earlier discussions focus on specific combinations of high data rate two-hop and low data rate one-hop transmissions in an 802.11b network, we conclude the paper by calculating the maximum number of VoIP calls that can be supported with uniform node distribution in 802.11b and 802.11g networks. These calculations show a significant increase in the number of VoIP calls when two-hop forwarding is used in an 802.11g network. This significant increase is due to the higher data rates and the low PHY overhead of the 802.11g MAC.

Original languageEnglish (US)
Title of host publication2006 3rd IEEE Consumer Communications and Networking Conference, CCNC 2006
Pages297-302
Number of pages6
DOIs
StatePublished - Oct 3 2006
Event2006 3rd IEEE Consumer Communications and Networking Conference, CCNC 2006 - Las Vegas, NV, United States
Duration: Jan 8 2006Jan 10 2006

Publication series

Name2006 3rd IEEE Consumer Communications and Networking Conference, CCNC 2006
Volume1

Other

Other2006 3rd IEEE Consumer Communications and Networking Conference, CCNC 2006
CountryUnited States
CityLas Vegas, NV
Period1/8/061/10/06

Keywords

  • IEEE 802.11
  • Link adaptation
  • MAC
  • Multi-hop forwarding
  • VoFi
  • VoIP
  • Voice Over IP
  • Wireless LANs

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Narayanan, S., & Panwar, S. S. (2006). When two-hop meets VoFi. In 2006 3rd IEEE Consumer Communications and Networking Conference, CCNC 2006 (pp. 297-302). [1593035] (2006 3rd IEEE Consumer Communications and Networking Conference, CCNC 2006; Vol. 1). https://doi.org/10.1109/CCNC.2006.1593035