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| A Random Access Mechanism Based on OFDM System |
| Yu Yi-fan; Yin Chang-chuan; Luo Tao; Yue Guang-xing |
| Institute of Telecommunication Engineering, BUPT; Beijing 100876, China |
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Abstract A MAC protocol, termed Dual Busy Tone Multiple Access(DBTMA), is a random access mechanism with high channel utilization for WLAN. However, it is difficult to realize the protocol with hardware. This paper proposes a new random access mechanism based on OFDM system by making simple modification on DBTMA and integrating it with power awase multi-access protocol with signalling. Furthermore, the new protocol is analysed and the result indicates that the proposed random access system shows well performance and is easy to be realized.
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Received: 15 January 2004
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2005, Vol. 27 
