A Polling Based Approach For Delay Analysis of WiMAX/IEEE 802.16 Systems

Abstract

Worldwide Interoperability for Microwave Access (WiMAX) is a wireless communication
which is based on IEEE 802.16 standard. Here a polling based queue model is implemented to
analyse the delay of WiMAX physical layer using Orthogonal Frequency Division Multiplexing
(OFDM) technique. The system involves three subscriber stations and single base station. If the
subscriber stations got packets to transmit, bandwidth request message will be sent to the base station
by replying the polling message. If resources are available base station will accept request, otherwise
request will be rejected. Two states are considered here and for each state the delay for uplink and
downlink is evaluated. WiMAX physical layer is implemented in MATLAB. This scenario is
extended to Multi Input Multi Output (MIMO) WiMAX systems. Performance compared in terms of
Bit Error Rate (BER) and packet arrival rate.