论文信息 - A Closed-Loop Link Adaptation Scheme for 324Mbit/sec WLAN System

A Closed-Loop Link Adaptation Scheme for 324Mbit/sec WLAN System

We developed a high speed wireless LAN prototype in the 5 GHz band. Maximum transmission rate of the developed WLAN system is 324 Mbit/sec using 6 multi-channels of 802.11a. We propose a closed-loop link adaptation scheme to improve MAC efficiency. The proposed scheme inserts MCS (Modulation and Coding Scheme) feedback information into Data frame and ACK frame. The MCS is calculated based on the estimated SNR. We compared the proposed link adaptation scheme with the legacy ACK-based link adaptation schemes by computerized simulation. The proposed link adaptation scheme achieved higher throughput than the legacy ACK-based link adaptation scheme. We also found that the proposed link adaptation scheme selected the optimal MCS on the developed WLAN system.

[1] A. M. Abdullah,et al. Wireless lan medium access control (mac) and physical layer (phy) specifications , 1997 .

[2] Hiroyuki Nakase,et al. Implementation of 324Mbps WLAN equipment with MAC frame aggregation for high MAC-SAP throughput , 2006, CCNC.

[3] Hiroyuki Nakase,et al. Implementation of 324Mbps WLAN equipment with MAC frame aggregation for high MAC-SAP throughput , 2006, CCNC 2006. 2006 3rd IEEE Consumer Communications and Networking Conference, 2006..