Adaptive QoS-aware resource allocation for high-speed mobile LTE wireless systems

Resource allocation is one of the key issues in long term evolution (LTE) systems. In this paper, we propose an adaptive resource allocation scheme with quality of service (QoS) guarantees to maximize system throughput for high-speed mobile LTE systems. In this scheme, considering that channel quality indicator (CQI) might be changed in fast mobile scenarios which can reduce the system throughput, we first propose a novel CQI feedback method to achieve continue high throughput. Then we optimize the resource blocks (RB) allocation procedure under QoS requirements and adopt a more effective modulation and coding scheme (MCS) selection method to improve the system performances. Through extensive simulations, the results show that the proposed resource allocation scheme can achieve higher system throughput and better performance stability compared with some existing schemes in high-speed mobile LTE systems.