Abstract: This paper studies strategy of bandwidth schedule in the IEEE 802.16 based on the mesh mode and proposes a stratified scheduling model.According to the principle of schedule load minimization, we conclude that an optimum division in the schedule exists in chain topology and prove that any mesh network, which can be decomposed into an aggregate of chain topology, also has the optimum stratification.A solution to the optimum stratification is provided, and the effects of BS's cover area on the stratification analyzed.Numerical results show that the bandwidth schedule with stratification remarkably decreases the loads and hops needed by scheduling.

Key words: IEEE 802.16, mesh, bandwidth schedule