Dual Token Bucket based HCCA Scheduler for IEEE 802.11e 


Vol. 34,  No. 11, pp. 1178-1190, Nov.  2009


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  Abstract

IEEE 802.11e proposed by IEEE 802.11 working group to guarantee QoS has contention based EDCA and contention free based HCCA. HCCA, a centralized polling based mechanism of 802.11e, needs a scheduling algorithm to allocate the network resource efficiently. The existing standard scheduler, however, is inefficient to support for QoS guarantee for real-time service having VBR traffic. To efficiently assign resource for VBR traffic, in this paper, we propose TXOP algorithm based on dual leaky bucket using average resource allocation and peak resource allocation. The minimum TXOP of each station is obtained by using statistical approach to maximize number of stations of which performance satisfy QoS target. Simulation results show that the proposed algorithm has much higher performance compared with reference scheduler in terms of throughput and delay.

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  Cite this article

[IEEE Style]

D. Lee and C. Lee, "Dual Token Bucket based HCCA Scheduler for IEEE 802.11e," The Journal of Korean Institute of Communications and Information Sciences, vol. 34, no. 11, pp. 1178-1190, 2009. DOI: .

[ACM Style]

Dong-yul Lee and Chae-woo Lee. 2009. Dual Token Bucket based HCCA Scheduler for IEEE 802.11e. The Journal of Korean Institute of Communications and Information Sciences, 34, 11, (2009), 1178-1190. DOI: .

[KICS Style]

Dong-yul Lee and Chae-woo Lee, "Dual Token Bucket based HCCA Scheduler for IEEE 802.11e," The Journal of Korean Institute of Communications and Information Sciences, vol. 34, no. 11, pp. 1178-1190, 11. 2009.

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pISSN : 1226 - 4717
eISSN : 2287 - 3880