Improved resource allocation scheme for optimizing the performance of cell edge users in Long Term Evolution-Advanced (LTE-A) system is proposed in this paper. The proposed algorithm optimally assigns and allocates Carrier Components (CCs), Radio Blocks (RBs) and Modulation and Coding Scheme (MCS) index for the users based on the Quality of Service (QoS) provision to meet the on demand service requests. The proposed algorithm divides the cell regions into cell centre and cell edge depending on the traffic load on the network. The available RBs are allocated to meet the on demands requests of the users among these two regions. RB usage ratio for optimizing the performance of the scheduling algorithm is used during resource allocation. As the RB usage ratio reaches more than 70%, throughput and data rates of the cell may not be reached in timely and reliable manner. The proposed algorithm takes RB usage ratio into consideration during scheduling to maintain minimum QoS provisions of the users for resource allocation. Simulation result shows that, performance of the cell edge users optimally met with minimum throughput and data rates for reliable communication in the LTE-A system.

提出了一种改进的资源分配方案，以优化高级长期演进（LTE-A）系统中的小区边缘用户的性能。所提出的算法基于服务质量（QoS）的规定，为用户最佳地分配和分配了载波分量（CC），无线电块（RB）和调制与编码方案（MCS）索引，以满足随需应变的服务请求。所提出的算法根据网络上的流量负载将信元区域划分为信元中心和信元边缘。在这两个区域之间分配可用的RB以满足用户的按需请求。在资源分配期间使用用于优化调度算法性能的RB使用率。随着RB使用率达到70％以上，可能无法及时可靠地达到小区的吞吐量和数据速率。提出的算法在调度过程中考虑了RB的使用率，以维持用户对资源分配的最低QoS要求。仿真结果表明，在LTE-A系统中，以最小的吞吐量和最小的数据速率可以最佳地满足小区边缘用户的性能。