An SNR aware stop and wait DCF optimization method

作者：Li Zhi Jie^*; Fang Xu Ming

来源：Acta Electronica Sinica, 2012, 40(7): 1333-1338.

DOI：10.3969/j.issn.0372-2112.2012.07.008

• Adaptive modulation and coding
• Analysis and simulation
• BER (bit error rate)
• Collision probability
• Cross layer optimization
• DCF (distributed coordination function)
• Distributed coordination functions
• Effective throughput
• Frame error rate
• IEEE 802.11s
• Loss differentiation
• Optimization method
• Performance analysis
• Rate controls
• Stop-and-wait
• Trade-off point
• Transmission error

A method of DCF (Distributed Coordination Function) optimization-Stop and Wait DCF integrated with the rate control and its performance analysis model are proposed in order to increase the effective throughput. SNR (Signal to Noise Ratio) thresholds of rate control are determined by tuning the BER (Bit Error Rate) of frame with the help of AMC (Adaptive Modulation and Coding) technology. When the SNR is below the lowest threshold, the DCF backoff process stops and waits till the channel SNR becomes big enough again. Therefore the transmission error could be decreased. Meanwhile, the access collision could be reduced either. Since the channel time, collision probability and frame error rate are changed differently as tuning BER, maximized throughput can be get at the tradeoff point of these parameters. The analysis and simulation indicate that the proposed model is accurate. The problem without packet loss differentiation is overcome and the cross layer optimization is implemented.

• 出版日期2012
• 单位西南交通大学