||With the rapid development of technology and the widespread of wireless networks, the ability of mobile devices likes tablet PCs and smart phones is also growing. In addition to providing text and voice calling, they also provide the diversity service likes the transmission of multimedia streaming and social networking, making the burden of the network more and more heavy. Therefore how to provide a smoother network experience becomes the competing goal of each ISP (Internet Service Provider).|
With the construction of high-speed rails, it makes the user move much quicker than the pedestrians and vehicles in the past. In the third generation of mobile networks, due to lack of support for the high-velocity user, the user can not have a stable connection on the high-speed rail. So LTE (Long Term Evolution) boosts supporting the high velocity of terminal to enhance the user's network experience. In addition to enhancing the transmission rate of uplink,downlink and spectrum efficiency, LTE-A also added a lot of new technologies such as RN (Relay Node), CoMP (Coordinated multi-point operation), and so on.
In this paper, we use the characteristic of the fixed path of the high-speed train, by making the train as a Relay Node and predicting the path of a train to accurately deliver the packets to the base station which will transport to the train to reduce the packet delay and loss rate and avoid the packets needed to be transferred between the base stations because of the handover. We further utilize CoMP of Coordinated Scheduling between base stations, thereby improving the user's network experience.
The simulation results show that, by predicting the path of packets, the proposed method in this paper can effectively enhance the overall amount of traffic, and reduce latency and packet loss rate.