5G BWP Configuration Reducing RMSI Acquisition Delay
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Solution Overview
Problem
The time delay caused by User Equipment (UE) acquiring a Common Control Resource Set (CORESET) of Remaining Minimum System Information (RMSI) for a new active Bandwidth Part (BWP) in 5G wireless communication systems is significant due to the need for UE to search for a synchronization broadcast block (SSB), which hinders efficient network performance.
Innovation Solution
A method and apparatus that generate and send configuration information to UE, including relative positions and timing patterns for each BWP, allowing UE to acquire the CORESET of RMSI without reading the physical broadcast channel (PBCH) of the SSB, thereby reducing the time delay by providing explicit positioning and timing information for CORESET acquisition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If UE searches for SSB to acquire CORESET of RMSI for new active BWP, then UE can obtain the necessary system information, but time delay is significantly increased
Solution Approach 1:
The base station pre-configures and indicates to the UE the frequency-domain starting position offset between SSB and each BWP, along with timing pattern information. This preliminary provision of positioning and timing data eliminates the need for UE to perform time-consuming searches for SSB when acquiring CORESET of RMSI for new active BWP, directly reducing the time delay while ensuring reliable system information acquisition
2Reliability
If UE performs comprehensive search for SSB to ensure accurate CORESET acquisition, then system information reliability is improved, but operation complexity increases
Solution Approach 1:
The base station acts as an intermediary by providing explicit configuration information including frequency-domain starting position offset and timing pattern to the UE. This intermediary provision of precise positioning and timing data enables the UE to directly acquire CORESET of RMSI without performing comprehensive SSB searches, thereby maintaining acquisition accuracy while significantly reducing operation complexity
Data Source
AI summary
A method of configuring information includes: generating first configuration information to be configured in a radio resource control (RRC) signaling, where the first configuration information indicates, for a bandwidth part (BWP), a relative position from a frequency-domain starting position of an SSB corresponding to the BWP to a frequency-domain starting position of the BWP; generating second configuration information for index information in a physical broadcast channel (PBCH) of the SSB in the BWP, where the second configuration information includes a timing pattern, half-frame indication information, and configuration information on RMSI PDCCH for the SSB, and the half-frame indication information indicates an identifier of a half-frame of a current radio frame in which the SSB is located; and sending the first configuration information and the second configuration information to user equipment (UE) through the RRC signaling.