基于多基站协作的多点传输在多播中的运用

Application of Coordinated Multi-point Transmission in Multimedia Multicast Service

在传统无线多播系统中,为保证多播组所有用户都能正确接收和解码基站发送的数据,基站只能以最差信道质量用户的传输速率传输数据,虽然保证了用户间公平性,但降低了多播系统吞吐量。为提高系统吞吐量,在传统的LTE多媒体多播系统中引入CoMP关键技术,通过选取多个小区形成CoMP协作集,CoMP协作集小区在相同资源块上同时为一个多播组内用户传输相同数据。仿真结果表明,在保证服务质量的情况下,MCMPT方案使多播系统吞吐量得到显著提高。

In the traditional wireless multicast system,in order to ensure that all users in multicast group can receive and decode data correctly,the base station can only choose the data rate of user in the poorest channel condition to transmit data.Although the fairness among all the users in the system is guaranteed,but the system throughput is low.In order to increase the system throughput,a new technique called CoMP is introduced to the traditional multi-media broadcast multicast service to solve this problem.Multiple base stations work together to transmit the same data to a multicast group at the same time in the same esource block.The simulation results show that the MCMPT scheme proposed in this paper makes the throughput of multicast system significantly improved.