Performance Evaluation of WLAN Channel Utilization of TXOP-HCCA for Real-time Applications
Erna Sri Sugesti1, Purnomo Sidi Priambodo2, Kalamullah Ramli3, Bagio Budiardjo4
1Erna Sri Sugesti, Ir., M.Sc. Student, Department of Electrical Engineering, University of Indonesia, Depok, Indonesia.
2Dr. Ir. Purnomo Sidi Priambodo, M. Sc. Student, Department of Electrical Engineering, University of Indonesia, Depok, Indonesia.
3Prof. Dr-Ing. Kalamullah Ramli, M Eng. Student, Department of Electrical Engineering, University of Indonesia, Depok, Indonesia.
4Prof. Dr. Ir. Bagio Budiardjo, M Sc. Student, Department of Electrical Engineering, University of Indonesia, Depok, Indonesia.
Manuscript received on 21 January 2013 | Revised Manuscript received on 28 January 2013 | Manuscript published on 30 January 2013 | PP: 107-113 | Volume-1 Issue-6, January 2013 | Retrieval Number: F0443021613/2013©BEIESP
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© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC-BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Abstract: This paper discusses the characteristics of Transmission Opportunity Hybrid Coordination Function Controlled Channel Access (TXOP-HCCA) for real-time application. This works presents the evaluation of TXOP duration limits based on IEEE 802.11e standard, and IEEE 802.11g for physical layer of ERP-OFDM and DSSS-OFDM technologies. HCCA 802.11e stated that superframe consists of Contention Free Period (CFP) and Contention Period (CP). In this work we utilized the CFP to transmit TXOP with different traffic rates for real time packet transmission. This TXOP consists of the packets with different payload and packet numbers. We optimize the payload to achieve maximum local TXOP. We present the detailed analysis of characteristics of TXOP-HCCA which is based on detailed logical explanation of tracing the superframe values. The evaluation stage is conducted in uniform traffic rate. Subsequently we evaluate the combined traffic rates by varying the packet’s payload and TXOP. Knapsack optimization method has been used to achieve the optimum TXOP in combined traffic rate. The simulation result shows that the optimum CFP utilization value is 88.12 %.
Keywords: Channel Utilization, TXOP-HCCA, CFP, Knapsack Optimization.
Scope of the Article: Discrete Optimization