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The IEEE 802.16 standard defines two modes of operation: Point-to-Multi-Point (PMP) and MESH mode. In the PMP mode, Subscriber Stations (SS) connect to the Base Station (BS) in single hop transmissions. Mesh mode, however, allows SSs to communicate with each other, thus forming a wireless multihop mesh network. The standard defines the basic mechanism and control messages that are used for scheduling and routing in the MESH mode but keeps the exact implementation open to vendors. Hence, researchers are attracted to work within this area, and plenty of works have been proposed insofar.
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