Token bucket based CAC and packet scheduling for IEEE 802.16 broadband wireless access networks

Abstract

The IEEE 802.16 standard was designed for Wireless Metropolitan Area Network (WMAN). It supports QoS and has very high transmission rate. The key part of 802.16 – packet scheduling, was undefined and is an open issue. We first proposed a token-bucket based uplink packet scheduling combined with call admission control (CAC) of 802.16. Then a model of characterizing traffic flows by token bucket is presented. The simulation results show that our CAC and uplink packet scheduling can promise the delay requirement of rtPS flows and our model can predict the delay and loss of a traffic flow precisely.