An enhanced A-MSDU frame aggretation scheme for 802.11n wireless networks

Saif, Anwar and Othman, Mohamed and Subramaniam, Shamala and Abdul Hamid, Nor Asila Wati (2012) An enhanced A-MSDU frame aggretation scheme for 802.11n wireless networks. Wireless Personal Communications, 66 (4). pp. 683-706. ISSN 1572-834X

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Abstract

The main goal of the IEEE 802.11n standard is to achieve a minimum throughput of 100 Mbps at the MAC service access point. This high throughput has been achieved via many enhancements in both the physical and MAC layers. A key enhancement at the MAC layer is frame aggregation in which the timing and headers overheads of the legacy MAC are reduced by aggregating multiple frames into a single large frame before being transmitted. Two aggregation schemes have been defined by the 802.11n standard, aggregate MAC service data unit (A-MSDU) and aggregate MAC protocol data unit (A-MPDU). As a consequence of the aggregation, newaggregation headers are introduced and become parts of the transmitted frame. Even though these headers are small compared to the legacy headers they still have a negative impact on the network performance, especially when aggregating frames of small payload. Moreover, the A-MSDU is highly influenced by the channel condition due mainly to lack of subframes sequence control and retransmission. In this paper, we have proposed an aggregation scheme (mA-MSDU) that reduces the aggregation headers and implements a retransmission control over the individual subframes at the MSDU level. The analysis and simulations results show the significance of the proposed scheme, specifically for applications that have a small frame size such as VoIP.

Item Type:Article
Keyword:Frame aggregation; Aggregation headers; WLAN; A-MSDU; Next generation networks; 802.11n
Subject:Wireless LANs
Subject:Wireless communication systems
Subject:IEEE 802.11 (Standard)
Faculty or Institute:Faculty of Computer Science and Information Technology
Publisher:Springer
DOI Number:10.1007/s11277-011-0358-8
ID Code:18455
Deposited By: Mohamad Jefri Mohamed Fauzi
Deposited On:28 Nov 2012 09:26
Last Modified:28 Nov 2012 09:26

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