5G UPF Local Switching for TSN Bridge UE-UE Traffic

The patent segments TSC traffic processing into two paths: UE-UE TSC traffic is handled locally by the UPF without passing through NW-TTs, while other TSC traffic continues to use the NW-TT path. This segmentation allows critical UE-UE traffic to bypass the longer path and achieve lower latency while maintaining network-wide control for other traffic types.

The UPF acts as an intermediary that receives traffic transmission type information from the SMF and uses this information to determine whether to perform local switching for UE-UE TSC traffic. This intermediary mechanism enables the system to dynamically route traffic based on type, achieving both low latency for UE-UE traffic and network-wide management for other traffic.

The SMF performs preliminary action by determining the traffic transmission type information in advance and providing it to the UPF before TSC traffic arrives. This allows the UPF to be pre-configured with the necessary PDR/FAR rules for local switching, reducing the complexity of real-time decision-making and simplifying the UPF's operational complexity.

The patent uses standardized PDR/FAR mechanisms that are already part of the 5G core network architecture, creating an equipotential solution that leverages existing protocols and procedures. By using familiar PDR/FAR structures rather than introducing entirely new mechanisms, the solution minimizes the increase in device complexity while achieving local switching functionality.