Urgency based scheduling for user-individual QoS in cellular MIMO-systems

We propose a framework for data scheduling in packet based wireless systems. The main goal of this approach is to enable user individual QoS management, while benefiting from the high data rates available with MIMO transmission. Therefore we assume that each user is characterized by a set of QoS requirements as his/her flow is accepted into the system. We introduce a generalized measure, the residual time, for the urgency of the next packet of each flow in the system. The residual time is derived from the transmission history of each flow as well as from the currently queued packets, with respect to the QoS requirements. Based on this urgency measure, a scheduling approach is outlined, which makes it possible to tune the tradeoff between throughput optimization and QoS orientation adoptively, based on the current cell load and flow urgency levels.