LTE MAC Scheduling And Resource Allocation Optimization

With the official application of TD-LTE wireless mobile communication technology, people’s life has changed a lot, and more expectancy has been focused on wireless network.In the period of GSM, people can experience a voice talk based on narrow band or low speed data services, long time for connecting voice and slow data transfer rates seriously hinder the user experience.In 3G era, the improved network speed still can not meet user needs.until LTE, users can not only enjoy high quality voice, but also the high-speed data services.But TD-LTE technology is facing a huge challenge because of the limited bandwidth resources and the rapid growth of the number of 4G users admiring for higher quality networks. How to use the limited bandwidth resources to optimizing LTE network has become a hot spot in recent years. So the program is designed to optimize the LTE network and improve network experience. This paper, based on MAC Layer of TD-LTE systems architecture, makes a deep research of the principle of MAC scheduling and resource allocation, and makes optimized verification combined with practical issues.In order to solve the spectrum utilization rate and operational delays caused by single MAC scheduling, the paper presents the SPS and dynamic scheduling adaptive scheduling scheme based on VoLTE voice services. By dragnet experiments, VoLTE semi-persistent and dynamic scheduling adaptive scheme is in line with the expectations, and slightly lifts the cell-throughput. Besides, MOS evaluation and PRB scheduling are more reasonable.Voice and data services are easy to produce resources fragments causing resource redundancy when different services exist at the same time, and the problem is caused by existing resource allocation. So, we propose using resource allocation TYPE 2 for single dynamic scheduling of voice service and verified that the optimization is feasible and effective in the lab. After analyzing logs of L2 for downlink of the eNode B, we found that user capacity for one sub-frame has improved, and 200 users can access to a single cell without RRC reestablishment.Facing the problem that PRB interference is concentrated in the front of the band for large data transfer, the paper proposes a new resource allocation strategy aimed at randomizing interference and diverging the PRB scheduling of different cells for same frequency networking as possible, in order to disperse front interference of the band and reduce the IOT bottom noise of uplink. Finally, the paper carried out that interference randomization scheme of large data meets the expectations. The front interference of the band is significantly dispersed, which tends to average uplink interference. Moreover, the access success rate, handover success rate, dropped calls and other indicators have been slightly improved.According to reasonable analysis and optimization experiments, the network optimization can be used in the public LTE network. But due to the higher requirements for the public network, the program still needs more experiments. However, it’s certainly that the business of optimization program will bring better network experience.