Performance Evaluation of a Resource Allocation Scheme for Mixed Traffic in Dynamic-TDD Network

Dynamic uplink and downlink reconfiguration is studied as an effective method to improve the system packet throughput performance in the LTE Heterogeneous Network. There are various kinds of traffic with different quality of service requirements in the practical wireless network, which has not been fully considered by the existing resource allocation strategies for dynamic TDD. In this paper, a resource allocation scheme coordinating the time and frequency resource for mixed traffic in the dynamic TDD scenario is proposed, which can guarantee the system requirements, such as time delay budget, packet drop rate and packet throughput. Utilities of users with different services are considered in the scheduling and dynamic UL-DL reconfiguration. Theoretical analysis and system level simulation are carried out to evaluate the performance. The simulation results show that compared with the existing resource allocation schemes, the proposed one offers a better performance, which are low packet drop rate of VoIP users and high packet throughput of FTP users.