UE Mobility Handling in Standalone Non-Public Networks
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Solution Overview
Problem
In standalone non-public networks (SNPN), unauthorized user equipment (UE) cannot access the network, leading to resource wastage due to failed registration updates when UE moves between independent networks owned by the same private entity, as the first SNPN does not share context with the second SNPN.
Innovation Solution
A method and user equipment (UE) that performs a registration procedure on a first SNPN, selects a second SNPN based on predetermined conditions, and transmits a registration request message for initial registration if the second SNPN differs from the first SNPN, resetting the registration attempt counter and initiating the registration process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE performs a registration update procedure with the second SNPN when moving from the first SNPN, then the UE attempts to maintain continuous service, but the registration update procedure fails because the first SNPN and the second SNPN are independent networks that do not share UE context
Solution Approach 1:
Instead of attempting a registration update procedure that assumes context sharing between independent SNPNs, the patent inverts the approach by performing a new initial registration procedure with the second SNPN. This inversion resolves the contradiction by abandoning the failed context-sharing assumption and establishing a fresh registration, thereby achieving reliable service continuity without requiring complex inter-SNPN context sharing mechanisms.
2Ease of operation
If multiple UEs experience failed registration update procedures in an enterprise with multiple SNPNs, then mobility management becomes problematic, but resource wastage increases due to repeated failed registration attempts
Solution Approach 1:
The patent extracts the problematic registration update procedure that causes repeated failures and resource wastage. By removing the update procedure step and replacing it with a direct initial registration approach, the solution eliminates the source of failure while maintaining mobility management efficiency, thereby reducing unnecessary resource consumption from repeated failed attempts.
Solution Approach 2:
The patent applies preliminary action by having the UE perform a new initial registration procedure before attempting any update operations when moving between independent SNPNs. This preliminary registration establishes a valid context with the target SNPN in advance, preventing subsequent failures and optimizing resource utilization by avoiding repeated failed registration attempts.
3Adaptability or versatility
If the UE is configured with a list of subscriber data including SNPN identity and SUPI, then the UE can select appropriate SNPNs, but unauthorized UEs may still attempt to access SNPNs leading to security concerns and resource wastage
Solution Approach 1:
The patent implements feedback mechanisms where the network provides authorization decisions to the UE based on the selected SNPN and subscriber data. The UE receives feedback indicating whether access is permitted or denied, allowing it to adapt its behavior accordingly. This feedback loop enables versatile SNPN selection while preventing resource wastage from unauthorized access attempts by immediately stopping further access tries when denied.
Data Source
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AI summary
The present disclosure relates to a pre-5th-Generation (5G) or 5G communication system to be provided for supporting higher data rates Beyond 4th-Generation (4G) communication system such as Long Term Evolution (LTE). Embodiments herein disclose a method performed by a terminal in a mobile communication system. The method includes performing a registration procedure on a first standalone non-public network (SNPN), selecting a second SNPN based on a predetermined condition, and transmitting, to a network entity, a registration request message on the second SNPN for an initial registration, in case that the second SNPN differs from the first SNPN.