Research on FN-Based MCVideo Service for Railway Communication System

With the emergence of the demand for railway multimedia services, the railway mobile communication system has begun to develop rapidly toward long-term evolution for railway (LTE-R). We analyze the railway video service requirements, compare the standardization processes of the 3rd Generation Partnership Project (3GPP) and International Union of Railways (UIC), and find that there is currently no solution for the rail-specific video services. Based on the above reasons, this paper designs and develops a video call scheme using Function Number (FN) for the railway system to enable railway multimedia services. First of all, the feasibility of the Mission Critical (MC) Service to the railway is discussed. Secondly, Mission Critical System (MCS) in LTE-R is introduced. Then, the Mission Critical Video (MCVideo) software architecture is designed, and the FN-based video service procedure is proposed in this paper, including FN registration and FN-based MCVideo call. Finally, the potential of the proposed scheme is verified on the laboratory static testbed. The results show that the proposed video call scheme has good performance.