PDCCH Monitoring Across Overlapping CORESETs for Beam Management
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Solution Overview
Problem
Existing technologies face challenges in efficiently monitoring physical downlink control channels in inter-cell scenarios with multiple input multiple output environments, particularly when non-serving cells with different PCIs are involved, leading to inadequate scheduling of UE dedicated signals and channels.
Innovation Solution
The proposed solution involves enhancing PDCCH monitoring by allowing UE to select multiple QCL TypeDs based on different variants, prioritizing CSS or USS sets with specific index rules, ensuring proper monitoring of PDCCH candidates across overlapping CORESETs with varying QCL-TypeD properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If UE monitors PDCCH candidates in overlapping monitoring occasions across multiple CORESETs with different QCL-TypeD properties in inter-cell scenarios, then inter-cell beam management capability is improved, but UE complexity and processing burden increase
Solution Approach 1:
The patent segments the PDCCH monitoring task by separating common search space (CSS) and user-specific search space (USS) processing, and by dividing CORESETs into different groups based on QCL-TypeD properties. This segmentation allows the UE to handle complex inter-cell beam management scenarios through structured, manageable processing stages rather than monolithic operations.
Solution Approach 2:
The patent introduces dynamic selection mechanisms where the UE can dynamically determine which CORESETs to monitor based on configured search spaces and QCL-TypeD properties. The dynamic nature of search space configuration and QCL state management enables flexible adaptation to different inter-cell beam management scenarios while controlling processing complexity through configured parameters.
2Measurement precision
If UE is configured to monitor multiple search spaces with different QCL-TypeD properties, then scheduling accuracy for UE dedicated signals is improved, but monitoring overhead and time consumption increase
Solution Approach 1:
The patent applies preliminary action through advance configuration of search spaces and QCL states by the network. The UE is pre-configured with multiple search spaces (CSS and USS) and their associated QCL-TypeD properties, allowing the UE to prepare and prioritize monitoring tasks before actual PDCCH reception, thereby reducing real-time processing time while maintaining scheduling accuracy.
Solution Approach 2:
The patent enables partial monitoring by allowing the UE to selectively monitor only the necessary search spaces based on configuration. The UE can prioritize monitoring of CSS for common control information and USS for UE-dedicated signals, applying partial action to critical components while reducing overall monitoring overhead by skipping less relevant search spaces when appropriate.
3Reliability
If UE prioritizes CSS over USS in overlapping CORESETs, then common control information reliability is improved, but UE dedicated signal scheduling may be delayed
Solution Approach 1:
The patent segments the PDCCH monitoring process into separate CSS and USS handling paths. By segmenting common control information monitoring from UE-dedicated signal monitoring, the system can ensure reliable CSS reception while maintaining efficient USS scheduling through independent processing streams, avoiding the delay problem that would arise from sequential processing.
Solution Approach 2:
The patent applies preliminary action by having the UE pre-identify and prioritize CSS monitoring for common control information, while simultaneously preparing USS monitoring for UE-dedicated signals. This preliminary organization of monitoring tasks allows both CSS and USS to be processed efficiently without CSS prioritization causing USS delays, as both are prepared in advance according to their respective importance.
Data Source
AI summary
Systems, methods, apparatuses, and computer-readable storage mediums are provided for enhancements to physical downlink control channel monitoring for inter-cell scenarios in case of a multiple input multiple output environment. In an example implementation, the method may comprise determining, by a network device of a communication network, to monitor physical downlink control channel candidates in overlapping monitoring occasions of two or more control resource sets of the communication network, wherein the two or more control resource sets are using at least two different QCL-TypeD on an active downlink bandwidth part of one or more cells; and selecting a first control resource set using a first QCL-TypeD and a second control resource set using a second QCL-TypeD for monitoring at least two of the physical downlink control channel candidates, wherein the selection of the first control resource set is based on common search space sets and/or user specific search space sets of at least one control resource set on active downlink bandwidth part of at least one cell that associated with one or more physical cell identifiers, and the selection of the second control resource set is based on user specific search space sets of at least one control resource set on active downlink bandwidth part of at least one cell that associated with at least two physical cell identifiers.