PCI Range Signaling for Faster SNPN Cell Reselection
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Solution Overview
Problem
Existing methods for cell reselection in stand-alone non-public networks (SNPNs) lead to increased UE power consumption and prolonged re-selection intervals due to the need for UEs to read master information blocks of higher ranked cells to check cell membership, which is inefficient and power-intensive.
Innovation Solution
Methods and devices for transferring SNPN and CAG information on interfaces between central and distributed units, and between RAN nodes and core networks, as well as providing PCI range information in dedicated signals to UEs, to assist cell reselection and paging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If UEs read master information blocks of higher ranked cells to check cell membership, then cell reselection accuracy is improved, but UE power consumption increases and re-selection interval is prolonged
Solution Approach 1:
The network pre-configures PCI range information and SNPN/CAG identifiers to UEs before cell reselection. This preliminary provision of filtering criteria allows UEs to quickly identify candidate cells without reading master information blocks, thereby reducing power consumption while maintaining reselection accuracy
Solution Approach 2:
The patent extracts and separates the cell identification function from the master information block reading process. By providing dedicated PCI range information and SNPN/CAG identifiers, the essential cell membership checking capability is extracted from the full system information, allowing UEs to perform efficient filtering without processing complete information blocks
2Measurement precision
If UEs read master information blocks of higher ranked cells to check cell membership, then cell reselection accuracy is improved, but re-selection interval is prolonged
Solution Approach 1:
The network pre-configures PCI range information and SNPN/CAG identifiers to UEs before cell reselection. This preliminary provision of filtering criteria allows UEs to quickly identify candidate cells without reading master information blocks, thereby reducing power consumption while maintaining reselection accuracy
Solution Approach 2:
The patent extracts and separates the cell identification function from the master information block reading process. By providing dedicated PCI range information and SNPN/CAG identifiers, the essential cell membership checking capability is extracted from the full system information, allowing UEs to perform efficient filtering without processing complete information blocks
3Productivity
If PCI range information is provided to UEs for cell reselection assistance, then network efficiency is improved, but information transfer complexity increases
Solution Approach 1:
The patent integrates PCI range information, SNPN identifiers, and CAG identifier lists into existing RRC signaling messages and system information blocks. This multi-functional approach allows a single information transfer mechanism to serve multiple purposes: cell identification, network type filtering, and reselection assistance, thereby improving network efficiency without proportionally increasing complexity
Data Source
AI summary
Method, systems and devices for wireless communication. The method includes receiving, by a user equipment (UE), a dedicated signal comprising physical cell identifier (PCI) range information and determining whether a preset condition has occurred. In response to determining that the preset condition has occurred, the method includes setting, by the UE, the PCI range information in the dedicated signal as invalid. In response to determining that the preset condition has not occurred, the method includes replacing, by the UE, previously received PCI range information by the PCI range information in the dedicated signal, and using the PCI range information in the dedicated signal to assist cell reselection.