A priority based semi-persistent scheduling for VoLTE

A semi-persistent scheduling mechanism is adopted in VoLTE (voice over LTE) service, but it cannot make full use of all radio resources due to its first-come-first-served strategy. Besides, because of limitations to transmission power and wireless resource utilisation rate, improving the performance of the uplink scheduling is more difficult. A priority based semi - persistent scheduling mechanism, is proposed based on QoS, packet delay, channel quality, user-demanded PRBs (Physical Resource Blocks), and average throughput, The proposed scheduling algorithm is tested and simulated under a VoLTE scenario using LTE-sim. Compared with traditional algorithms, the performance with regard to user fairness, resource utilisation, and system capacity was improved.