5G eCPRI+4G CPRI室内分布式射频共享技术方案的研究

Technical Solution of 5G eCPRI+4G CPRI Indoor Distributed RF Sharing

5G+4G联合部署和协同发展是5G大规模部署初期最主要的形态,并将长期存在。5G共享4G现有的核心网、无线接入网的基带单元BBU和射频单元RU等网络资源,是5G+4G联合部署并能够顺利演进到5G独立部署的关键技术之一。因此,总结基于CPRI前传接口的5G+4G一体式射频共享和基于5G eCPRI+4G CPRI前传接口一体式射频共享的技术方案,并借鉴O-RAN白盒硬件化架构和工程实践,提出了一种基于5G eCPRI+4G CPRI前传接口的室内分布式射频共享的技术方案以及相应的硬件实现架构。该方案由一个前传网关数字处理单元FHGW和多个可以在一个小区中共享相同无线频谱资源的分布式射频拉远单元pRRH组成,使得5G+4G的部署更加灵活,射频单元的体积更小,安装更加方便,成本和功耗更低。

5G+4G joint deployment and collaborative development is the most major form of 5G large-scale deployment in the early stage,and it will exist for a long time.5G shares the existing 4G core network,RAN’s BBU,RAN’s RU and other network resources.It is one of the key technologies for 5G+4G joint deployment and smooth evolution to 5G independent deployment.Therefore,this paper summarizes the technical solution of integrated RF sharing based on only CPRI and fronthaul interface based on 5G eCPRI+4G CPRI,and proposes a technical solution for indoor distributed radio sharing based on 5G eCPRI+4G CPRI fronthaul interface and the corresponding hardware implementation architecture.The scheme is composed of a fronthaul gateway digital processing unit FHGW and multiple distributed radio remote units pRRH that can share the same wireless spectrum resources in a cell.This configuration makes the deployment of 5G+4G more flexible,the size of the radio frequency unit is smaller,the installation is more convenient,and the cost and power consumption are lower.