Two-stage Channel-aware Uplink Transmission Scheme with SC-FDMA in LTE Networks

Two-stage Channel-aware Uplink Transmission Scheme with SC-FDMA in LTE Networks

The primary goal of radio resource management (RRM) is to allocate the radio resources to meet the quality of service (QoS) requirements and improve the system performance. In this paper, we propose an uplink scheduling scheme jointing the bandwidth allocation and the excess bandwidth compensation for GBR (real-time) and Non-GBR (non-real-time) traffics in the LTE (Long Term Evolution) wireless network. Besides, both the short-term and long-term periods are also considered to meet the requirements of real-time service. This strategy comprises of two phases including the minimal bandwidth requirement assignment (MBRA), namely Phase 1, and the minimum guarantee and assignment of remaining resource block (ARRB), namely Phase 2. The MBRA serves the Video and VoIP user equipments (UEs) to achieve a superior performance in terms of the packet delay and jitter; and the ARRB is applied for allocating remaining resource blocks (RBs) to the GBR UEs to achieve a higher system throughput by considering the best channel condition and the proportional fairness. Simulation results show that the performance of our proposed scheme outperforms the first maximum expansion (FME) and the proportional fair (PF) schemes.