A LTE downlink scheduling mechanism with the prediction of packet delay

The growing demand of real-time services, such as video streaming and VoIP with high constraints on delays and bandwidth brings new challenges in the design of wireless communication system. So how to use radio resource efficiently becomes an important point for the LTE system. In our paper, we propose a new LTE downlink packet scheduler, which adopts the packet delay to prioritize packet transmissions and uses packet prediction mechanism to solve the burst transmission situation. We also use the channel quality indicator that users report to the eNodeB to classify users´ mobility, and then we utilize different resource allocation schemes for uses with different mobility in every transmission time interval. The simulations are conducted by LTE-Sim R5 to analyze the performance of proposed method. And the simulation results show that the proposed method outperforms other packet scheduling schemes in terms of goodput, packet delays, and packet loss rates. Our proposed method can improve the spectrum efficiency and satisfy the QoS requirements of real-time traffic.