URSP Rule Local Resource Routing in 5G UE
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Solution Overview
Problem
Current 5G telecommunications systems lack the ability to divert traffic within user equipment (UE) to local endpoints, as URSPs are only designed to route traffic to destinations related to the core network, slices, or data networks, without referencing local resources.
Innovation Solution
The system introduces UE route selection policy (URSP) rules that allow traffic to be routed to local devices, locations, or network addresses within the UE by including specific parameters such as network addresses, service names, slice IDs, and PDU session identifiers, enabling traffic diversion to local resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If URSP rules are designed to route traffic only to core network destinations, then network control and management are simplified, but the ability to divert traffic to local endpoints within UE is lost
Solution Approach 1:
The destination parameter in URSP rules is segmented into multiple types: core network destinations (original functionality) and local endpoints (new functionality). This segmentation allows the system to handle different routing scenarios independently while maintaining the existing URSP rule structure, thus resolving the contradiction between adaptability and device complexity
Solution Approach 2:
The URSP rule structure is enhanced to support multiple destination types universally. The same URSP rule framework that previously handled only core network destinations now universally handles both core network destinations and local endpoints, making the system more versatile without requiring separate rule structures for different routing scenarios
2Loss of time
If traffic is routed through the core network, then network management and control are simplified, but latency and network load increase
Solution Approach 1:
The network acts as an intermediary by providing URSP rules that enable local routing decisions at the UE. The core network maintains control by distributing routing policies, while local endpoints handle actual traffic processing, reducing latency for local traffic while preserving network management capabilities
Solution Approach 2:
Routing decisions are made in advance through pre-configured URSP rules distributed by the network to the UE. This preliminary action allows the UE to immediately route traffic to local endpoints without real-time network intervention, reducing latency while maintaining network control over the routing policy
3Adaptability or versatility
If URSP rules include local resource references, then edge applications can be deployed, but the URSP rule structure becomes more complex
Solution Approach 1:
Local endpoint identification parameters are extracted as distinct elements within the URSP rule structure. By separating local resource references from core network destination parameters, the system can support edge applications while maintaining a clear, organized rule structure that doesn't unnecessarily increase overall complexity
Data Source
AI summary
A telecommunications system includes: a user equipment (UE); an access network (AN); and a core network (CN) composed of CN elements. A CN element comprises a set of UE route selection policy (URSP) rules, wherein each URSP rule comprises at least the following parameters: precedence value of URSP rule, a traffic descriptor, and at least a route selection descriptor containing a destination for matching traffic. The UE comprises one or more local resources which comprise: a local device or location in the UE, either physical or logical; and/or a local network address in the UE. A CN element is configured to instruct the UE with one or more URSP rules to route traffic matching the traffic descriptor to the destination local resource, local device, location or local network address in the UE. The UE is configured to direct the matching traffic to the destination in the URSP rule.