UE Network Slice Access via Frequency-Priority Cell Reselection
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Solution Overview
Problem
Existing systems face challenges in efficiently configuring User Equipment (UE) to access specific services in non-public mobile networks (NPNs) without causing registration failures and ensuring seamless network slice selection, particularly when network slice support is not initially considered during cell selection procedures.
Innovation Solution
The proposed solution involves the default subscription owner network, such as a PLMN or SNPN, storing both default and new service subscription data separately, and using UDM/UDR to update UE configuration with dedicated S-NSSAIs, DNNs, CAG lists, or preferred frequencies, enabling UE to perform cell reselection and registration with the correct network slices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the UE performs cell selection without network slice support consideration, then the cell selection procedure is simple and fast, but the UE cannot access specific services requiring dedicated network slices
Solution Approach 1:
The network performs preliminary actions by determining and storing subscription data indicating which UEs should be provisioned with updated configuration information for network slice access. This preliminary identification allows the UE to be pre-configured with the necessary S-NSSAIs and frequency priorities before actual service access is needed, resolving the contradiction between fast cell selection and network slice access capability.
Solution Approach 2:
The network introduces an intermediary configuration information that bridges the gap between simple cell selection and network slice access. This configuration information, including S-NSSAIs and frequency priorities, acts as a mediator that enables the UE to perform both fast cell selection and access to dedicated network slices without compromising either function.
2Adaptability or versatility
If the UE is provisioned with updated subscription information for specific services, then the UE can access dedicated network slices, but registration failures may occur due to configuration conflicts
Solution Approach 1:
The network applies local quality by providing UE-specific configuration information tailored to each UE's subscription data. Instead of a blanket configuration for all UEs, the network identifies which specific UEs require updated configuration and provides them with customized S-NSSAIs and frequency priorities, thereby enabling network slice access while avoiding registration failures caused by inappropriate generic configurations.
Solution Approach 2:
The system implements feedback mechanisms where the network monitors UE registration attempts and configuration status. When configuration information is provided to a UE, the network can detect registration failures and adjust subsequent provisioning decisions, ensuring that only UEs appropriately configured for specific network slices are provisioned with updated subscription information, thus maintaining high registration success rates.
3Adaptability or versatility
If the network stores and manages updated subscription data for all UEs, then any UE can potentially access specific services, but the network complexity and data management overhead increase
Solution Approach 1:
The network segments its data management approach by dividing UEs into different categories based on their subscription data and service requirements. Instead of managing configuration information for all UEs uniformly, the network identifies and separates UEs that need updated configuration from those that don't, thereby reducing overall network complexity while maintaining the flexibility to provision specific services to appropriate UEs.
Data Source
AI summary
Apparatuses, methods, and systems are disclosed for provisioning a UE with information to access a specific service. One apparatus includes a transceiver that communicates with a mobile communication network and a processor that sends a first registration request to the mobile communication network, the mobile communication network supporting a plurality of network slices. The processor receives configuration information from the mobile communication network, the configuration information enabling the apparatus to use at least one network slice from the plurality of network slices, wherein the configuration information includes a frequency priority for the at least one network slice. The processor performs cell reselection using at least the frequency priority and sends a second registration request to the mobile communication network after performing the cell reselection, wherein the second registration requests to register with the at least one network slice.