On the Performance of IEEE 802.16 OFDMA System Under Different Frequency Reuse and Subcarrier Permutation Patterns

In interference-limited wireless cellular systems, interference avoidance and interference averaging are widely adopted to combat co-channel interference. In different types of wireless networks, these two basic frequency planning methods are implemented under variable system deployment strategies. With respect to the IEEE 802.16 OFDMA network, interference avoidance is usually carried out by carefully designing the frequency reuse patterns, while interference averaging is implemented by distributed subcarrier permutation, which can be further divided into multiple operation modes. In this paper, based on the system level simulation of the average signal to interference-plus-noise ratio (SINR) in the 802.16 system, the performance metrics of system throughput and outage probability are estimated. According to the predetermined evaluation criterions, the system performances under variable combination patterns of frequency reuse and subcarrier permutation are evaluated. Finally, the optimal frequency planning strategies, in terms of the frequency reuse pattern and the subcarrier permutation mode, is obtained, which can serve as a reference in practical network deployments.