New Cross Layer, Resource Allocation scheme for Delay Sensitive Service in 802.16e and 802.16m

This paper provides an efficient channel aware resource allocation scheme for IEEE 802.16e and 802.16m WiMAX Mobile, real-time and delay sensitive service. Compared to a similar scheduling approach, our considered scheduler can guarantee and achieve lower delay with a good average throughput. In order to achieve this object, we introduce a scheduling scheme with three different segments in a decision making process. The first part, a time dependent function that considers the time when packets wait in queues and in a jitter area to prevent packet deadline. The second part, retrieved from proportional fairness algorithms, which in normal conditions gives a fair share to users. Channel SNR and service class weight are also involved in this part. The final section of scheduling relationship, channel condition, is defined more accurately by CQI, RSSI and CINR parameters. The simulation results in OPNET show that our proposed scheme has a very good delay and packet loss ratio accompanied by a high throughput. In another scenario, with different number of users and limit resources, we show relationship between admission control and scheduling.