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- Title
On delay constrained CAC scheme and scheduling policy for CBR traffic in IEEE 802.11e wireless LANs.
- Authors
Deng, Der-Jiunn; Ke, Chih-Heng; Chao, Han-Chien; Huang, Yueh-Min
- Abstract
CBR (constant bit rate) traffic is expected to be an important traffic source in wireless networks. Such sources usually have stringent jitter or delay requirements and in many cases they should be delivered exactly as they were generated. In this paper, we propose a strictly guaranteed QoS (quality-of-service) provisioning CAC (call admission control) scheme with a polling-based scheduling policy for CBR traffic in IEEE 802.11e wireless LANs. Under such a scheme, the proposed transmit-permission policy for HCCA (HCF controlled channel access) method can forecast the maximum suffered delay for each packet and derive sufficient conditions so that all the CBR sources satisfy their time constraints to provide deterministic QoS guarantees. A simple analytical model is carried out to estimate the average queueing delay of the proposed scheme. In addition to theoretical analysis, simulations are conducted to validate its promising performance. Our simulation results show that the proposed scheme maintains a high throughput with respect to the whole range of system load. Copyright © 2009 John Wiley & Sons, Ltd. CBR (constant bit rate) traffic is expected to be an important traffic source in wireless networks. Such sources usually have stringent jitter or delay requirements and in many cases they should be delivered exactly as they were generated. In this paper, we propose a strictly guaranteed QoS (quality-of-service) provisioningCAC (call admission control) scheme with a polling-based scheduling policy for CBR traffic in IEEE 802.11e wireless LANs.
- Subjects
BIT rate; INTERNET traffic; IEEE 802.11 (Standard); WIRELESS LANs; CONTROL theory (Engineering); COMPUTER simulation; COMPUTER scheduling
- Publication
Wireless Communications & Mobile Computing, 2010, Vol 10, Issue 11, p1509
- ISSN
1530-8669
- Publication type
Article
- DOI
10.1002/wcm.840