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Wireless mesh networks (WMNs) have become immensely popular these days. In order to satisfy user service requirements, multimedia applications need quality of service (QoS) support. Since the mesh routers are usually stationary in WMNs, a better performance is expected in WMNs as compared to ad hoc networks. But sustaining QoS in wireless mesh networks still remains a challenging task. A fundamental management function in WMNs for backing up multimedia applications is to have admission control. In this paper, we propose a protocol called Rate Adaptive Routing on Cliques Admission Control (RA-RCAC) that provides rate adaptive admission control such that the network layer provides feedback in case of network congestion at the application layer. By simulations, RA-RCAC is compared against MARIA  and RCAC , showing its superiority in terms of throughput, end-to-end delay, packet delivery ratio and loss ratio, chosen as performance metrics.