A novel resource allocation scheme based on resource efficiency for LTE-A system

Resource allocation in Orthogonal Frequency Division Multiple (OFDM) system is implemented by assigning subcarriers and power to all users in order to achieve large throughput and high energy efficiency. The base station acts as a scheduler, which aims at scheduling active users as many as possible and maximizes the system throughput. Conventional schemes allocate resource to user mainly based on Quality of Service (QoS), spectral efficiency or maximum throughput without considering the resource efficiency. These schemes achieve compromise between maximized throughput and user fairness. However, there is excessive resource occupied. In this paper, a novel resource allocation algorithm based on proportional fairness (PF) algorithm is proposed. This novel algorithm mainly promotes the resource efficiency for LTE or LTE-A system during resource allocation. Meanwhile, the scheme takes user fairness and QoS into consideration and approaches the global optimal solution. According to simulation, the proposed algorithm achieves higher resource utilities efficiency and schedule more users with the limit resource.