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The awareness of channel conditions is critical to routing and MAC protocols. But, it is challenging to assess channel conditions due to the highly dynamic nature of wireless links. As a succession to a study of IEEE 802.11 links in an indoor environment, this paper presents observations and analysis of extensive measurements on IEEE 802.11 channels in an outdoor environment. The experiments are designed to investigate the channel dynamics through metrics such as successful frame delivery rate, loss rate, and Signal-to-Noise Ratio on IEEE 802.11 networks. The objective of this paper is to reveal the interaction between these metrics and their variations in time and space.
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