On delay constrained CAC scheme and scheduling policy for CBR traffic in IEEE 802.11e wireless LANs

Der Jiunn Deng, Chih Heng Ke, Han Chien Chao, Yueh Min Huang

研究成果: Article

10 引文 斯高帕斯(Scopus)

摘要

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.

原文English
頁(從 - 到)1509-1520
頁數12
期刊Wireless Communications and Mobile Computing
10
發行號11
DOIs
出版狀態Published - 2010 十一月 1

All Science Journal Classification (ASJC) codes

  • Information Systems
  • Computer Networks and Communications
  • Electrical and Electronic Engineering

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