Wireless Communication Onboarding for Non-Public Network Cell Selection
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Solution Overview
Problem
Existing 5G networks face challenges in efficiently identifying and connecting to non-public networks (NPNs), leading to increased power consumption, longer cell selection times, and higher connection failure rates due to unsuitable measurement configurations and lack of network information.
Innovation Solution
Implementing non-public network (NPN) cell identification and subscription on an access stratum (AS) level through synchronization sequences in synchronization signal blocks, NPN identifiers in system information, and access class permissions, using pre-configured bandwidth parts for efficient UE mobility and resource management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the NG-RAN configures measurement configuration without non-public network information, then the UE can perform cell measurement, but the cell selection time increases and connection failure rate increases
Solution Approach 1:
The patent applies preliminary action by having the NG-RAN configure measurement configuration with non-public network information (such as SSB configurations, frequency lists, and cell identities) before the UE performs cell measurements. This advance preparation enables the UE to quickly identify suitable non-public network cells without performing blind measurements, thereby reducing cell selection time and improving connection reliability.
2Reliability
If the NG-RAN waits for verification result before configuring measurement, then connection reliability improves, but latency increases
Solution Approach 1:
The patent applies preliminary action by performing subscription verification through the AMF before the NG-RAN configures measurement configuration. The AMF verifies whether the UE is a non-public network subscriber and provides verification results to the NG-RAN in advance, enabling the NG-RAN to configure appropriate measurement configurations without waiting during the connection establishment process.
Solution Approach 2:
The patent uses the AMF as an intermediary between the UE and NG-RAN for subscription verification. The AMF receives the selected non-public network identifier from the UE, performs verification, and communicates the verification result to the NG-RAN, thereby decoupling the verification process from the measurement configuration process and reducing latency.
3Ease of operation
If the UE performs blind measurement for non-public network cells, then cell selection can be performed, but power consumption increases
Solution Approach 1:
The patent applies preliminary action by having the NG-RAN provide the UE with pre-configured measurement configurations including non-public network cell identities, frequency information, and SSB configurations before the UE performs measurements. This enables the UE to perform targeted measurements only on relevant non-public network cells rather than performing blind measurements across all frequencies, significantly reducing power consumption while maintaining autonomous cell selection capability.
Data Source
AI summary
A wireless communication method for onboarding and provisioning in non-public networks (NPN) is disclosed, wherein a first next-generation radio access network (NG-RAN) transmits NPN-related information to a user equipment (UE). The method introduces mechanisms for NPN cell identification, synchronization sequences, and system information broadcasting, enabling NPN access and provisioning. Improvements include the transmission of synchronization sequences on initial bandwidth parts (BWP), integration of NPN access permissions in system information elements (IEs), and/or enhanced system information delivery on downlink BWPs for NPN access.