TY - GEN
T1 - Soft reservation based prioritized access
T2 - 10th International Conference on Wireless Algorithms, Systems, and Applications, WASA 2015
AU - Feng, Bing
AU - Wang, Zhen
AU - Zhang, Chi
AU - Yu, Nenghai
AU - Fang, Yuguang
N1 - Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].
PY - 2015
Y1 - 2015
N2 - In this paper, we propose a novel scheme for VoIP over WLANs, referred to as SRPA (Soft Reservation based Prioritized Access). To fully exploit the on/off characteristics of conversational speech to improve the VoIP capacity, SRPA adopts soft reservation where the reserved channel resources of voice users in silence periods can be released to support more backlogged voice users in talking periods. SRPA completely separates admitted voice users from new voice users, and the admitted voice users are given higher priority access to the channel, based on the fact that maintaining the QoS requirements of admitted voice calls is more important than admitting new voice calls. The dedicated contention period for admitted voice users is contention backoff window whose size is dynamically adjusted on the basis of estimation of the number of contending voice users. In addition, a two-state Markov model is derived for the proposed scheme to analyze the VoIP capacity. Both analysis and simulation results demonstrate that SRPA significantly improves the VoIP capacity while guaranteeing the strict QoS requirements of admitted voice calls in WLANs.
AB - In this paper, we propose a novel scheme for VoIP over WLANs, referred to as SRPA (Soft Reservation based Prioritized Access). To fully exploit the on/off characteristics of conversational speech to improve the VoIP capacity, SRPA adopts soft reservation where the reserved channel resources of voice users in silence periods can be released to support more backlogged voice users in talking periods. SRPA completely separates admitted voice users from new voice users, and the admitted voice users are given higher priority access to the channel, based on the fact that maintaining the QoS requirements of admitted voice calls is more important than admitting new voice calls. The dedicated contention period for admitted voice users is contention backoff window whose size is dynamically adjusted on the basis of estimation of the number of contending voice users. In addition, a two-state Markov model is derived for the proposed scheme to analyze the VoIP capacity. Both analysis and simulation results demonstrate that SRPA significantly improves the VoIP capacity while guaranteeing the strict QoS requirements of admitted voice calls in WLANs.
KW - Hybrid MAC
KW - QoS
KW - Soft reservation
KW - VoIP
KW - WLANs
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UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-84943643716&origin=recordpage
U2 - 10.1007/978-3-319-21837-3_13
DO - 10.1007/978-3-319-21837-3_13
M3 - RGC 32 - Refereed conference paper (with host publication)
SN - 9783319218366
VL - 9204
T3 - Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
SP - 123
EP - 133
BT - Wireless Algorithms, Systems, and Applications - 10th International Conference, WASA 2015, Proceedings
PB - Springer Verlag
Y2 - 10 August 2015 through 12 August 2015
ER -