PDCCH Detection Efficiency in Multi-TRP Beam Failure
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Solution Overview
Problem
Existing communication systems face challenges in maintaining reliability and robustness for Physical Downlink Control Channel (PDCCH) due to beam failures, particularly in multi-Transmission and Reception Point (TRP) deployments, where partial beam failures are not adequately addressed, leading to inefficient PDCCH detection.
Innovation Solution
The method involves a terminal device receiving configurations for multiple control resource sets (CORESETs) associated with different sets of reference signals for beam failure detection, allowing it to monitor PDCCH candidates based on radio link quality assessments across these sets, and adjust monitoring or decoding accordingly in response to beam failures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple CORESETs are configured for multi-TRP deployment to improve reliability, then PDCCH detection robustness is improved, but terminal device complexity increases
Solution Approach 1:
The patent divides the PDCCH detection process into separate handling for different CORESETs based on their TCI state configurations. When a beam failure is detected in one TCI state, the terminal selectively stops monitoring PDCCH candidates only in affected CORESETs while continuing to monitor other CORESETs with valid TCI states, thereby segmenting the failure impact and maintaining overall detection reliability without requiring complete system reconfiguration
Solution Approach 2:
The patent implements dynamic adaptation of PDCCH monitoring behavior based on real-time beam failure detection results. The terminal device dynamically adjusts its monitoring strategy by evaluating the relationship between detected beam failures and configured TCI states, selectively disabling monitoring only where necessary while maintaining monitoring elsewhere, thus adapting to changing channel conditions without fixed rigid rules
2Measurement precision
If beam failure detection is performed over multiple reference signal sets to improve reliability, then detection accuracy is improved, but processing time increases
Solution Approach 1:
The patent segments the reference signal sets into multiple TCI state groups, each associated with specific CORESETs. The terminal performs beam failure detection independently for each TCI state using its associated reference signals, allowing parallel processing and early termination when failures are detected in certain segments, thereby reducing overall processing time while maintaining comprehensive detection accuracy
Solution Approach 2:
The patent applies partial action by performing beam failure detection only on the necessary subset of reference signal sets corresponding to active TCI states and their associated CORESETs. When a beam failure is detected, the terminal performs partial monitoring cessation only for affected CORESETs rather than halting all PDCCH monitoring, thus reducing processing overhead while maintaining adequate detection coverage
Data Source
AI summary
Embodiments of the present disclosure relate to methods, devices and computer storage media for communication. A method comprises receiving, at a terminal device, at least one configuration about a first control resource set (CORESET) and a second CORESET, wherein the at least one configuration indicates that the first CORESET is associated with a first set of reference signals (RSs) for beam failure detection (BFD), and the second CORESET is associated with the first set of RSs or a second set of RSs for BFD; and monitoring at least one PDCCH candidate based on detection of a beam failure with assessing radio link quality over at least one of the first set of RSs and the second set of RSs. As such, some meaningless blind detection for PDCCH can be avoided, so as to increase the efficiency of PDCCH detection.