Based on the research of the fifth generation of mobile communications, this paper focuses on supporting the reliable transmission technology of URLLC, and studies how to achieve transmission with higher reliability than the single-user plane channel and network function in the user plane path. Supports highly reliable transmission schemes through redundant transmission in the user plane. This transmission scheme focuses on the improvement of backhaul reliability, that is, there is no need to change the radio interface and related protocols; only a single UE is required, that is, no UE redundancy, the network nodes and related interfaces and the redundancy of concurrent PDU sessions are introduced into the network; network transmission The transport layer on the protocol is redundant, with a single network node, without UE influence.

Shuhua Mao, Xiaoli Xie, Bolu Lei and Liya Li. Research on User Plane Redundant Transmission Technology for Highly Reliable 5G URLLC. International Journal of Frontiers in Sociology (2021), Vol. 3, Issue 1: 30-35. https://doi.org/10.25236/IJFS.2021.030104.

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