Abstract
WiMax broadband MAN based on the IEEE 802.16d/e standard supports mobile as well as fixed wireless access services. The underlying subscriber data links are characterised by totally different radio conditions such as propagation, interference rejection capability, terminal antenna gain, pattern and height. This leads to a significant coverage mismatch, different user throughput, system capacity and spectrum efficiency. In this paper, the basic performance of mobile and fixed subscribers has been thoroughly analysed for homogeneous hexagonal 3.5βGHz cellular deployments of an OFDMβbased WiMax system depending on cell size, frequency reuse and offered traffic load. Network level simulation results on user FTPβapplication throughput, channel load, modulation and coding scheme utilisation and packet call blocking have been presented for cell radius of 300, 1000 and 2000βm in tight 1βΓβ1 and 1βΓβ3 frequency reuse, respectively. The future performance enhancements from optional features as Block Turbo Coding, downlink Power Control, scheduling schemes, subβchannelling in scalable OFDMA and advanced antenna technology have been evaluated and simulation results provided. Copyright Β© 2006 AEIT.