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In wireless mesh networks that are built using IEEE 802.11 techniques, there are significant problems in maintaining fairness and low delay to provide QoS for long-hop flows. To address these issues, express forwarding has been proposed. However, existing studies of express forwarding are simulation based, and the main benefits that have been demonstrated are limited to shortened delay for long-hop flows. In contrast, the authors present an analytical model in this paper that considers the possible interruptions of the express forwarding mechanism.
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