Performance enhancement for IEEE 802.11e networks by adaptive adjustment of the HCCA/EDCA ratio

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Performance enhancement for IEEE 802.11e networks by adaptive adjustment of the HCCA/EDCA ratio

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Conference On Ubiquitous Information Management And Communication archive
Proceedings of the 3rd International Conference on Ubiquitous Information Management and Communication table of contents

Suwon, Korea

SESSION: Wireless LAN and mesh networks table of contents

Pages 1-6

Year of Publication: 2009

ISBN:978-1-60558-405-8

Authors

Wei Kuang Lai	National Sun Yat-Sen University, Kaohsiung, Taiwan, R.O.C
Chin-Shiuh Shieh	Kaohsiung Univ. of Applied Sciences, Kaohsiung, Taiwan, R.O.C
Chih-Shiuan Jiang	National Sun Yat-Sen University, Kaohsiung, Taiwan, R.O.C

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SIGKDD: ACM Special Interest Group on Knowledge Discovery in Data

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ACM New York, NY, USA

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ABSTRACT

To reduce the average delay and to improve the overall system throughput in IEEE 802.11e environment, a novel scheme for the adaptive adjustment of the ratio of HCCA and EDCA periods is developed and presented in this article. The fundamental idea is to choose favorable transfer modes for traffics with different characteristics. The ratio of HCCA and EDCA periods can be dynamically adjusted by changing the CAPLimit value, which specifies the maximal permissible duration for HCCA. A two-phase algorithm is designed to adaptively adjust the CAPLimit value based on measured system dynamics. In Phase 1, coarse-grain adjustment was made to the CAPLimit value according to the measured ratio of CBR-prone traffics and VBR-prone traffics. In Phase 2, the CAPLimit value is subject to fine-tuning based on observed system throughput. Simulation results reveal that the proposed scheme can effectively reduce the average delay and, in the same time, is capable of maintaining or even improving the total throughput.

REFERENCES

Note: OCR errors may be found in this Reference List extracted from the full text article. ACM has opted to expose the complete List rather than only correct and linked references.

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