In a mesh topology, the traffic between access points (APs) is very closely related. Under the Institute of Electrical and Electronics Engineers (IEEE) standard 802.11, the carrier-sense multiple access with collision avoidance (CSMA/CA) and Request To Send (RTS)/Clear To Send (CTS) procedures only take into account station (STA)-to-STA transmissions, leading to inefficiencies and overhead for the mesh case. To address this type of challenge, techniques are presented herein that enable, within a wireless mesh network (WMN), collision-free RTS/CTS procedures supporting uplink channel access for the forwarding of backhaul traffic. Aspects of the presented techniques include a mechanism trough which every AP may be made aware of a WMN’s coverage knowledge (e.g., the topology of the mesh network), provide a fine-grained wireless channel asymmetry identification between every mesh node, leverage the WMN coverage knowledge to perform augmented RTS and CTS heuristics, and implement a multi-hop network allocation vector (NAV) channel reservation and distribution facility.
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Vegas, Thomas; Cuissard, Vincent; Gazzarrini, Loris; and Karmakar, Anirban, "PROVIDING CENTRALIZED AND RTS/CTS-BASED CHANNEL ACCESS AND RESERVATION", Technical Disclosure Commons, (April 04, 2022)