Non-Volatile Computer-Readable Media for 5G NR Beam Reconnection
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Solution Overview
Problem
Existing beam management processes in 5G New Radio (NR) FR2 are inefficient and time-consuming, particularly in scenarios where the user equipment (UE) loses connection and needs to re-establish communication with a base station, requiring extensive beam scanning and measurement.
Innovation Solution
A method for fast beam searching that utilizes stored cell identity (ID) and synchronization signal block (SSB) information from a previous network connection to facilitate quick reconnection, and employs selective signal strength measurement and reporting to identify optimal beams for initial access, potentially bypassing full beam scanning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If comprehensive beam scanning and measurement are performed during reconnection, then beam selection reliability is improved, but connection re-establishment time increases
Solution Approach 1:
The UE stores cell ID and SSB information from previous network connections in advance. During reconnection, this pre-stored information is directly utilized to identify the target base station and select beams, eliminating the need for comprehensive beam scanning and measurement that would otherwise be required.
Solution Approach 2:
The patent uses stored copies of cell ID and SSB information from previous connections instead of performing new measurements. The UE retrieves these pre-captured signals and identifiers to rapidly re-establish connection, avoiding redundant scanning operations while maintaining reliable beam selection.
2Measurement precision
If comprehensive beam scanning is performed, then beam selection accuracy is improved, but energy consumption increases
Solution Approach 1:
Beam scanning and signal measurement are performed in advance during the previous network connection. The results are stored as cell ID and SSB information, allowing the UE to skip energy-intensive scanning operations during reconnection while maintaining accurate beam selection through the use of pre-captured data.
Solution Approach 2:
Instead of performing full comprehensive beam scanning during reconnection, the patent uses a partial approach by leveraging previously collected SSB information. This selective reuse of measurement data achieves sufficient beam selection accuracy without the excessive energy consumption of complete rescan operations.
3Reliability
If full beam scanning is performed during reconnection, then connection reliability is improved, but processing time increases
Solution Approach 1:
The necessary beam information (SSB and cell ID) is obtained and stored during the previous connection before disconnection occurs. During reconnection, this pre-prepared information enables immediate identification of the target base station and beam selection, significantly accelerating the reconnection process while maintaining reliability through the use of validated previous measurement data.
Data Source
AI summary
A method for beam searching suitable for user equipment (UE) is provided. The UE stores a cell ID and a synchronization signal block (SSB) of a previous network connection with a first base station. The method includes the following steps. A reconnection to the base station is performed. The cell ID and the SSB of the previous network connection with the first base station are read. Information of the cell ID and the SSB is transmitted to the first base station via a physical random access channel (PRACH). An initial access to the first base station is performed by the UE through the cell ID and the SSB in response to the cell ID in the PRACH received by the first base station matching a preset cell ID configured by the previously connected base station.