Channel Aware Uplink Scheduler for a Mobile Subscriber Station of IEEE 802.16e
The scheduling part of the IEEE 802.16 (WiMAX) standards is kept as an open issue to provide differentiation among equipment manufacturers and operators. The uplink scheduling is very significant and more complex compared to downlink scheduling. Uplink scheduling is divided into two parts; one is scheduling the resources among many users from a Base Station (BS) and the other is sharing the resources among its services in a single user. BS uplink scheduling has been given more attention compared to Subscriber Station (SS) uplink scheduling. SS scheduler plays a significant role in providing the Quality of Service (QoS) among its services. The channel status awareness is vital in designing the SS scheduler as the channel conditions vary for a mobile user.