An adaptive polling scheme supporting audio/video streaming in wireless LANs

Yaw-Chung Chen*, Han Ru Yeh

*Corresponding author for this work

Research output: Contribution to conferencePaperpeer-review

6 Scopus citations

Abstract

Nowadays IEEE 802.11 family is the most popular technology amongst wireless protocols including Bluetooth, UWB and WiMAX for wireless services, among which media streaming such as voice over Internet Protocol (VoIP) and IPTV are most demanded with high challenge. To accommodate the QoS issues, EDCA and HCCA functions are defined in IEEE 802.11e. However, EDCA provides QoS based on probability, so it is still unable to fulfill the requirements of time sensitive applications such as VoIP. In this study, we focus on HCCA polling scheme. We design a new time-based polling scheduler called Adaptive Time-Stamp Polling (ATSP) scheme for QoS improvement, as well as design a mechanism that detects silence mode of a VoIP conversation so as to reduce the frequency of polling silent stations. When the station comes back to talk-spurt mode, we revert to the original frequency to poll. Simulation results show that our scheme improves the QoS on throughput, jitter, and access delay significantly.

Original languageEnglish
Pages16-22
Number of pages7
DOIs
StatePublished - 1 Dec 2008
Event12th IEEE International Workshop on Future Trends of Distributed Computing Systems, FTDCS 2008 - Kunming, China
Duration: 21 Oct 200823 Oct 2008

Conference

Conference12th IEEE International Workshop on Future Trends of Distributed Computing Systems, FTDCS 2008
CountryChina
CityKunming
Period21/10/0823/10/08

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