HW/SW codesigned implementation of IEEE 802.16 TDMA MAC for the subscriber station

The design for the TDMA MAC of the SS based on IEEE 802.16 have to meet the timing constraints for the uplink transmission, whereas for the non time-critical downlink, constraints such as implementation complexity and memory consumption have to be considered. One way to satisfy these requests is to using hardware/software codesign scheme. In this paper, we analyze the timing constraint in the SS side and determine what part should be implemented in HW. Also we present the HW/SW codesigned TDMA MAC of the SS based on the embedded system and show how we validate and implement it.