基于Cloud-RAN的协作式无线接入网架构

Cloud-RAN架构和CoMP技术是未来蜂窝移动通信的两个重要演进方向。基于Cloud-RAN的网络架构结合了信息通信技术领域最先进的云计算、虚拟化以及软件无线电等技术,具有维护升级简单、可扩展性强,基站调度灵活、能耗低,便于实现协作式无线传输技术等特点。CoMP技术是一种重要的协作式无线接入网技术,通过小区间的协作传输,可以有效降低小区间干扰,提高系统容量。通过将这两种技术融合起来,构建基于Cloud-RAN的协作式无线接入网,可以在多基站间进行高效的数据传递与共享,结合软件无线电技术,可以针对移动通信技术特征实现分层次的软件优化,通过使用多线程设计和指令集并行技术,提高软件运行效率,实现基于通用处理器平台的协作化无线接入网。基于Cloud-RAN的协作式无线接入网系统设计方案和实现优化方案具有一定的通用性,可以为未来Cloud-RAN架构和CoMP技术的融合提供参考。

Cooperative wireless access network based on Cloud RAN

Cloud RAN and CoMP are both the important evolution directions of wireless communication technology. The network architecture based on Cloud RAN has the features of simple maintenance, scalability, flexible scheduling, lower energy consumption, and easy to implement cooperative wireless transmission technology because it integrates many advanced Information Communication Technology technologies such as cloud computing, virtualization, software defined radio. CoMP technology is an important cooperative wireless access network technology, it allows the coordinated transmission of multiple base stations which can alleviate inter cell co channel interference and improve system capacity effectively. Cooperative wireless access network based on Cloud RAN can be implemented by combining these two technologies together. It achieves the data transfer and sharing between multiple base stations. Through combining the software defined radio technology, the software can be optimized hierarchically according to the characteristics of mobile communication technology. By using the multi thread design and parallel technology of instruction set, the operational efficiency of the software can be improved and the cooperative wireless access network based on general purpose processor platform can be realized. The cooperative wireless access network system design and implementation based on Cloud RAN provided in this survey has certain versatility, which provides a reference to the future development of Cloud RAN and CoMP technology.