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By comparing with the characteristics of the traditional mobile Quality-of-Service mechanisms, the idea of zone-based bandwidth allocation for mobile users in the IEEE 802.16j multi-hop relay network (IEEE 802.16-MR) is proposed in the paper. The zone of a mobile user includes the current relay station and its neighboring relay stations within the zone size in hop count. Bandwidth allocation is made for the mobile user roaming within the zone, and calculation of the required bandwidth is presented in the paper. Adaptive selection of the zone size fit for user mobility is the main focus of the paper. Markovian analysis is used to determine the proper zone size. Simulation study has demonstrated the effectiveness of the adaptive zone scheme.
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