The 802 . 11 g 6 Mb / s rate is less robust than 11 Mb / s
نویسنده
چکیده
The robustness to noise of the 802.11b/g 5.5 Mb/s and 11 Mb/s rates must be investigated experimentally as they cannot be predicted theoretically. In this paper we report on detailed outdoor and indoor measurements that lead us to the surprising conclusion that the 6 Mb/s 802.11g rate experiences more packet loss than the 11 Mb/s 802.11g rate at any given SNR. This occurs due to the combination of modulation and physical layer coding schemes used by these rates and has serious implications for rate control algorithms. The practical implications of this, factoring in the interaction between packet loss and 802.11 MAC retries, is that the 6 Mb/s rate is effectively redundant.
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