A radio resource scheduling algorithm considering wireless channel characteristics in IEEE 802.16 OFDMA systems

Abstract

In this paper, we propose a radio resource scheduling algorithm for a scheduler in IEEE 802.16 Orthogonal Frequency Division Multiple Access (OFDMA) specification. The scheduler dynamically allocates slots considering wireless channel conditions of subscriber stations to improve radio resource utilization efficiency. The results show that with the proposed algorithm, smaller radio resources are used to maintain the same data traffic rate than a constant bandwidth allocation algorithm without considering characteristics of OFDMA systems. Therefore, the scheduler can serve wider bandwidth to established connections, or may use saved radio resources for other purpose.