An Optimized QoS Traffic-Scheduling Algorithm based on HCCA

Author

Shenglin Shi ; Guangxi Zhu ; Gang Su

Author_Institution

Dept. of Electron. & Inf. Eng., Huazhong Univ. of Sci. & Technol., Wuhan

Volume

2

fYear

2008

fDate

20-22 Oct. 2008

Firstpage

229

Lastpage

233

Abstract

The IEEE 802.11 e defines the hybrid coordination function (HCF) which specifies the QoS algorithms in the MAC layer of the WLAN. HCF controlled channel access (HCCA) is based on centralized polling mechanism and provides parameterized QoS. This paper proposes an optimized traffic scheduling algorithm for variable bit rate (VBR) over HCCA, which can allocate network resource based on actual flows using dynamic service intervals and transmission opportunity. The simulation results show that the optimized scheduling algorithm can significantly improve the traffic channel utilization, throughput and packet loss ratio.

Keywords

IEEE standards; access protocols; optimisation; quality of service; resource allocation; scheduling; telecommunication traffic; wireless LAN; wireless channels; IEEE 802.11 e; MAC layer; WLAN; centralized polling mechanism; dynamic service interval; dynamic service transmission opportunity; hybrid coordination function controlled channel access; network resource allocation; optimized QoS traffic-scheduling algorithm; variable bit rate; Access protocols; Automation; Bandwidth; Bit rate; Dynamic scheduling; Media Access Protocol; Scheduling algorithm; Telecommunication traffic; Traffic control; Wireless LAN; HCCA; QoS; Transmission Opportunity;

fLanguage

English

Publisher

ieee

Conference_Titel

Intelligent Computation Technology and Automation (ICICTA), 2008 International Conference on

Conference_Location

Hunan

Print_ISBN

978-0-7695-3357-5

Type

conf

DOI

10.1109/ICICTA.2008.279

Filename

4659756