OCSA: An algorithm for burst mapping in IEEE 802.16e mobile WiMAX networks

Most of IEEE 802.16e resource allocation proposals only focus on how to allocate the resources to meet QoS parameters such as throughput, delay, and delay-jitter. As described in the standard, the mapping from the allocation into downlink subframe for each burst needs to be in a rectangular shape. The rectangular mapping problem is a variation of a bin or strip packing problem, which is known to be NP complete. However, the mapping decision needs to be made within a few milliseconds for each Mobile WiMAX frame. In this paper, we introduce a heuristic algorithm, called One Column Striping with non-increasing Area first mapping (OCSA). The algorithm is fast and simple to implement and minimizes the unused slots in the frame.