(First, the basic outline of wireless Mesh network is briefly recalled, and the necessity and main meaning of providing QoS assurance in wireless Mesh network are analyzed. Then, it systematically introduces the domestic and foreign research status of the physical layer, MAC layer and routing layer QoS assurance technology and cross-layer QoS scheme technology of wireless Mesh network. It has been classified in detail and scientifically. Finally, their research difficulties and research directions are given.)
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