A Bandwidth Scheduling Architecture for IEEE 802.16 Wireless MAN in TDD Mode

A fair and efficient bandwidth allocation scheduling architecture for IEEE 802.16 Broadband Wireless Access (BWA) systems in TDD mode is proposed. In this area, comparing with the traditional fixed bandwidth allocation, the proposed scheduling architecture allocates uplink and downlink bandwidth simultaneously and dynamically. A Deficit Fair Priority Queue (DFDQ) algorithm is proposed to schedule different service flow, which provides more fairness to the system. The simulation results show the proposed architecture can meet the QoS requirement and fairness for all types of traffic.