A variety of scheduling strategies is available in LTE. The scheduling strategy is based on a certain metric.
– Round-Robin.
No quality indication is taken into consideration. The resources are mainly shared in an equal manner.
– Max C/I.
The UE with the best channel conditions gets the highest priority. The cell throughput is maximized. Starvation of UEs with channels of low quality may be a disadvantage. C i= Qi (1).
– Proportional Fair.
This algorithm defines priorities based on the quality and the averaged scheduled rate. I.e.:
Ci = R(Q)i/{Ri} (2).
– QoS
Different strategies exist to get QoS related information integrated.
E.g. Depending on the priority of the service and/or the UE, RT/NRT service type. a scheduling weight can be introduced.
Ci = Pi (3).
Combinations of the different types can also be applied.