URSP Rule Matching for MA PDU Session with 4G PDN Leg
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Solution Overview
Problem
In 5G wireless communication networks, UE-requested parameters for PDN connections during the PDN procedure in EPS are not considered during URSP rule evaluation, leading to suboptimal data traffic management and potential network congestion.
Innovation Solution
A method for enhancing UE route selection policy (URSP) rule matching for MA PDU sessions with 4G PDN leg, where the UE selects and evaluates a route selection descriptor (RSD) from a list of RSDs in a selected URSP rule to match with a PDU session, considering UE-requested PDN parameters, thereby optimizing data traffic distribution across multiple access networks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If UE-requested parameters are not considered during URSP rule evaluation, then the matching process is simpler and faster, but data traffic management becomes suboptimal and network congestion increases
Solution Approach 1:
The patent applies preliminary action by pre-establishing the PDN connection and storing UE-requested parameters before the URSP rule evaluation process. This allows the parameters to be readily available during matching without adding real-time complexity, thus improving traffic management efficiency while maintaining simple evaluation logic.
Solution Approach 2:
The patent introduces an intermediary mechanism where the UE-requested PDN parameters act as a bridge between the PDN connection establishment and the URSP rule evaluation. These parameters are passed as input to the matching process, enabling better traffic management without directly complicating the core evaluation logic.
2Reliability
If UE-requested PDN parameters are considered during URSP rule matching, then traffic distribution is optimized and network congestion is reduced, but the matching process becomes more complex
Solution Approach 1:
The patent applies local quality by selectively considering UE-requested PDN parameters only in specific contexts where they improve traffic distribution, rather than universally applying complex evaluation criteria. This allows optimization of traffic distribution while maintaining simpler matching processes for cases where additional parameter consideration is not beneficial.
3Measurement precision
If multiple parameters are evaluated during URSP rule matching, then matching precision improves, but processing time increases
Solution Approach 1:
The patent applies partial action by selectively evaluating only the most relevant UE-requested PDN parameters during URSP rule matching, rather than considering all possible parameters. This approach maintains high matching precision for critical traffic management decisions while reducing processing time by avoiding unnecessary parameter evaluations.
Data Source
AI summary
A method for UE route selection policy (URSP) rule matching enhancement for MA PDU session with 4G PDN leg is proposed. When an application is executed, the upper layer of a UE sends the application information to URSP entity for matching a URSP rule. The UE selects and evaluates a route selection descriptor (RSD) from a list of RSDs of a selected URSP rule to be matched with a PDU session. In one example, the PDU session is an MA PDU session with a 3GPP EPS/PDN leg (PDN connection established as user plane resources of the MA PDU session). The UE finds the traffic descriptor in a selected URSP rule matching the application and an existing MA PDU session/PDN connection matching an RSD of the selected URSP rule, when the UE-requested PDN parameters of the PDN connection matches with the RSD of the selected URSP rule.