5G-R System Coverage Scheme for Long Railway Tunnels
Due to the limited number of RRUs connected by BBUs and limited remote signal distance of optical fibers between BBUs and RRUs in the 5G-R system,and in view of the difficulties in the construction and maintenance of long tunnels,the 5G-R system coverage scheme for long tunnels deserves special attention under the condition of no BBU in the tunnel.On the basis of a survey of the equipment manufacturers and an analysis of the published technical conditions of the 5G-R system,this paper firstly analyzes the characteristics and networking method of 5G-R base stations.It then studies the link budget of and proposes a RRU setting interval for the 5G-R system in tunnels.In view of the scenarios of long tunnels of different lengths,it finally provides suggestions on the coverage scheme for the 5G-R system in tunnels of different lengths under the condition of no BBU in the tunnel.
万方数据
维普
