RB preserver downlink scheduling algorithm for real-time multimedia services in LTE networks

Long Term Evolution (LTE) is a breakthrough in broadband technology, which aims to support several high level quality and real time multimedia services for mobile users which were important concern in the preceding generation of mobile networks. In this paper, a Quality-of-Service (QoS) aware packet scheduler for Real Time (RT) downlink communication in LTE was designed. A resource block (RB) preserver scheduling algorithm that has two layers is proposed. The upper layer exploits the LTE frame features of aggregating multiple numbers of sub-frames. As for the lower layer, different scheduling algorithm's metrics were computed in order to achieve the QoS. Furthermore, a comparison between these algorithm metrics was done to select the best one that can satisfy the QoS requirements. Simulation results show that the proposed approach satisfies the QoS requirement for the RT flows.