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Novel Design and Analysis of Aggregated ARQ Protocols for IEEE 802.11n                                          NetworksTh...
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Novel design and analysis of aggregated arq protocols for ieee 802.11n networks

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Novel design and analysis of aggregated arq protocols for ieee 802.11n networks

  1. 1. Novel Design and Analysis of Aggregated ARQ Protocols for IEEE 802.11n NetworksThe design of wireless local area networks (WLANs) with enhanced throughput performancehave attracted significant amounts of attention in recent years. Based on the IEEE 802.11nstandard, frame aggregation is considered one of the major factors to improve the systemperformance of WLANs from the medium access control (MAC) perspective. In order to fulfillthe requirements of high throughput performance, feasible design of automatic repeat request(ARQ) mechanisms becomes important for providing reliable data transmission. In this paper,two MAC-defined ARQ protocols are proposed to consider the effect from frame aggregation forthe enhancement of network throughput. An aggregated selective repeat ARQ (ASR-ARQ)scheme is proposed which incorporates the selective repeat ARQ scheme with the considerationof frame aggregation. On the other hand, for worse channel quality, the aggregated hybrid ARQ(AH-ARQ) mechanism is proposed to further enhance the throughput performance by adoptingthe Reed-Solomon block code as forward error correction scheme. Novel analytical models forboth the ASR-ARQ and AH-ARQ protocols are established with the consideration of interferingwireless stations. Simulations are conducted to validate and compare the proposed ARQmechanisms based on the service time distribution and system throughput. Numericalevaluations show that the proposed AH-ARQ protocol can outperform the other schemes underworse channel condition; while the ASR-ARQ scheme is superior to the other mechanisms underbetter channel condition. Ambit lick Solutions Mail Id: Ambitlick@gmail.com , Ambitlicksolutions@gmail.Com

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