PDCCH Coverage via PBCH Combining and CORESET Segmentation
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Solution Overview
Problem
In wireless communications, particularly in 5G new radio (NR) networks, user equipment (UE) in low coverage areas face challenges in receiving physical broadcast channels (PBCH), physical downlink control channels (PDCCH), and physical downlink shared channels (PDSCH).
Innovation Solution
The proposed solution involves improving coverage by combining multiple PBCHs to enhance channel strength and reliability. Additionally, the method includes configuring control resource sets (CORESETS) to carry PDCCHs, where each CORESET is associated with a specific beam and can be quasi-co-located with a synchronized signal block (SSB).
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple PBCHs are combined to enhance channel strength, then coverage and reliability are improved, but device complexity and processing overhead increase
Solution Approach 1:
The patent combines multiple PBCH transmissions (repetitions) to improve channel reception reliability. Specifically, multiple PBCHs carrying the same information are transmitted in different time slots or frequency resources, and the UE combines these repetitions to enhance signal strength and decoding reliability in low coverage areas.
2Reliability
If control resource sets are configured for each beam, then beam-specific coverage is improved, but system complexity increases
Solution Approach 1:
The patent divides the downlink coverage area into multiple beams, with each beam having its own control resource set (CORESET) configuration. This segmentation allows each beam to be optimized independently for specific coverage areas, improving reliability for UEs in different spatial directions while maintaining manageable complexity through structured configuration.
3Reliability
If multiple CORESETS are received based on PBCH, then PDCCH coverage is enhanced, but processing time and complexity increase
Solution Approach 1:
The patent configures multiple CORESETS in advance based on PBCH reception, preparing control channel resources before actual PDCCH transmission. This preliminary configuration allows the UE to have multiple candidate CORESETS ready, reducing processing time during actual PDCCH reception by eliminating the need for dynamic search and configuration during data transmission.
Data Source
AI summary
A method for wireless communication performed by a user equipment (UE) includes receiving a physical broadcast channel (PBCH). The method also includes receiving a number of control resource sets (CORESETS) based on the received PBCH. The method further includes receiving one or more physical downlink shared channels (PDSCHs) based on receiving the number of CORESETS.