Limiting UE Route Selection Policy Rules to Authorized Networks

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Solution Overview

Problem

Existing UE Route Selection Policy Rules are only set by the Home PLMN and applied universally by a UE without regard for the registered PLMN, leading to potential conflicts and inefficiencies due to differing traffic profiles between PLMNs.

Innovation Solution

Implementing procedures in network nodes and user equipment to limit the application of route selection policy rules to specific networks, where a UE receives policy delivery requests with lists of network identities for which rules must be applied, and only applies these rules in registered networks included in the list.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a UE applies URSP rules provisioned from HPLMN universally without restriction, then the UE can maintain consistent policy application across different networks, but the rules may become ineffective or conflicting when applied in networks with different traffic profiles

Engineering Contradiction:

Improvepolicy application consistencyVSAvoidnetwork-specific rule applicability

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The patent applies local quality by associating URSP rules with specific PLMN identities, allowing different policy rules to be applied in different networks. The UE now has the capability to apply HPLMN-provisioned rules only in authorized PLMNs while using VPLMN-provisioned rules in other networks, making the policy application locally adapted to each network's traffic profile rather than universally applied

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent segments the previously unified URSP rule application into distinct segments: rules applicable in HPLMN, rules applicable in VPLMN, and rules applicable in specific authorized PLMNs. This segmentation is achieved by introducing PLMN identity associations with URSP rules, allowing the UE to selectively apply appropriate rule sets based on the current network context

Inventive Principle:

Principle #1Segmentation

2Adaptability or versatility

If HPLMN provisions URSP rules for all possible networks, then the UE can have comprehensive policy coverage, but the complexity of policy management increases and conflicts between rules from different PLMNs arise

Engineering Contradiction:

Improvepolicy coverageVSAvoidpolicy management complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent applies preliminary action by having the HPLMN pre-authorize specific VPLMNs in advance before the UE roams to them. The HPLMN maintains a pre-configured list of authorized VPLMN identities, and the UE uses this pre-established authorization information to determine which HPLMN-provisioned URSP rules to apply, avoiding the need for complex real-time policy conflicts resolution

Inventive Principle:

Principle #10Preliminary action

3Ease of operation

If a UE uses URSP rules from HPLMN when roaming in VPLMN, then the UE maintains home network policy preferences, but the VPLMN cannot enforce its own traffic routing requirements

Engineering Contradiction:

Improvehome network policy continuityVSAvoidvisited network policy enforcement

Core Design Contradiction:

Ease of operationVSAdaptability or versatility

Solution Approach 1:

The patent applies dynamics by making URSP rule application dynamic and context-dependent rather than static. The UE dynamically determines which set of URSP rules to apply based on the current network identity and pre-authorized PLMN lists. When roaming in an authorized VPLMN, the UE can apply HPLMN-provisioned rules; when in unauthorized networks, the UE switches to applying VPLMN-provisioned rules, allowing seamless adaptation to network context

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS20250175881A1Limiting route selection policy rules to some networks

Publication Date: 2025.05.29 LENOVO (SINGAPORE) PTE LTD

AI summary

There is further provided a user equipment apparatus comprising a receiver, a transmitter and a processor. The receiver is arranged to receive from a first wireless communication network at least one route selection policy rule together with a policy delivery request, wherein the policy delivery request includes a list of network identities for which route selection policy rules provisioned from the first wireless communication network must be applied. The transmitter is arranged to transmit a registration request to a second wireless communication network, where a network identity of the second wireless communication network is not listed in the list of network identities for which route selection policy rules provisioned from the first wireless communication network must be applied. The processor is arranged to not apply route selection policy rules provisioned from the first wireless communication network.