標題: An Adaptive Polling Scheme Supporting Audio/Video Streaming in Wireless LANs
作者: Chen, Yaw-Chung
Yeh, Han-Ru
資訊工程學系
Department of Computer Science
公開日期: 1-一月-2008
摘要: 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 defects 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.
URI: http://dx.doi.org/10.1109/FTDCS.2008.38
http://hdl.handle.net/11536/146246
ISSN: 1071-0485
DOI: 10.1109/FTDCS.2008.38
期刊: 12TH IEEE INTERNATIONAL WORKSHOP ON FUTURE TRENDS OF DISTRIBUTED COMPUTING SYSTEMS, PROCEEDINGS
起始頁: 16
顯示於類別:會議論文