Cell Selection Core Network Support
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Solution Overview
Problem
User equipment (UE) may experience service failures or delays due to mismatched core networks during radio resource control (RRC) connection reestablishment or release procedures, as it may select cells that do not support the required core network, leading to unnecessary cell reselection and service delays.
Innovation Solution
An electronic device and method that camp on a first cell, register with a first core network, identify events requiring cell selection, and select a cell based on both cell search results and core network support, ensuring the selected cell supports the required core network, thereby preventing RRC connection mismatches and service delays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE selects a cell solely according to the cell selection criterion, then the cell selection process is simple and fast, but the service may fail or be delayed due to core network mismatch
Solution Approach 1:
The patent applies preliminary action by checking core network support capability before final cell selection. The UE identifies the core network type it needs to connect to, then filters candidate cells based on their core network support capability before making the final selection. This advance checking prevents service failures due to core network mismatch while maintaining a relatively simple selection process.
2Productivity
If the UE performs RRC connection reestablishment or RRC release procedure, then the connection can be restored or released as needed, but the UE may select a cell that does not support the required core network, causing unnecessary cell reselection and service delays
Solution Approach 1:
The patent implements feedback by using the identified core network type from the current connection to guide the cell selection process. The UE receives feedback information about the core network type (EPC or 5GC) from the current connection or network messages, then uses this feedback to select a target cell that supports the same core network type, avoiding unnecessary reselection and service delays.
3Ease of operation
If the UE camps on a cell without verifying core network support, then the cell selection process is quick, but the RRC connection may be released due to core network mismatch
Solution Approach 1:
The patent applies preliminary action by checking core network support capability before final cell selection. The UE identifies the core network type it needs to connect to, then filters candidate cells based on their core network support capability before making the final selection. This advance checking prevents service failures due to core network mismatch while maintaining a relatively simple selection process.
Data Source
AI summary
An electronic device is provided. The electronic device includes at least one processor, and the at least one processor may be configured to camp on a first cell, perform a procedure for registration in a first core network after camping on the first cell, identify occurrence of an event requiring cell selection in a state registered with the first core network, identify a core network corresponding to the occurred event, identify a core network supported by each of at least one second cell, identify a measurement result of the reference signal respectively associated with at least one third cell supporting the core network corresponding to the occurred event among the at least one second cell, and camp on the identified fourth cell among the at least one third cell, based on the measurement result.