Beam Failure Recovery CORESET Configuration Across Cells and BWPs
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Solution Overview
Problem
Existing technologies lack a flexible configuration solution for Control Resource Set Beam Failure Recovery (CORESET-BFR) in multi-carrier systems using digital-analog hybrid beamforming in 5G NR communications.
Innovation Solution
Incorporating cell and bandwidth part (BWP) indices into the configuration information of CORESET-BFR via higher layer signaling to enable flexible configuration, allowing beam failure recovery by switching to a different cell or BWP and determining quasi-colocation (QCL) information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If beam failure recovery procedure is triggered and reconfiguration is performed, then connection reliability is improved, but time loss increases due to the complexity of the recovery procedure
Solution Approach 1:
The beam failure recovery procedure is divided into two independent parts: (1) a first part executed by the terminal device that does not require network cooperation, and (2) a second part executed by the network side device that requires terminal feedback. This segmentation allows the terminal to perform initial recovery actions independently, reducing the overall time loss while maintaining connection reliability.
Solution Approach 2:
The terminal device performs the first part of the recovery procedure proactively without waiting for network instructions. By initiating recovery actions in advance and independently, the terminal reduces the time loss associated with waiting for network response while still ensuring reliable reconnection.
2Reliability
If existing beam failure recovery procedures are used, then connection reliability is maintained, but device complexity increases due to additional configurations and feedback mechanisms
Solution Approach 1:
The recovery procedure is segmented into terminal-executed actions and network-executed actions. The terminal device only needs to implement the first part, which simplifies its complexity, while the network side device handles the second part that requires additional configurations. This division reduces the complexity burden on the terminal device.
Solution Approach 2:
A feedback mechanism acts as an intermediary between the terminal device and the network side device. The terminal feeds back status information to the network, which then decides whether to execute the second part of the recovery procedure. This intermediary approach simplifies the terminal's complexity by allowing it to rely on network coordination for complex operations.
Data Source
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AI summary
A beam failure recovery method, a terminal device, and a network side device are provided. The method includes: receiving higher layer signaling, where the higher layer signaling includes configuration information of a control resource set for beam failure recovery CORESET-BFR configured for the terminal device. The configuration information of the CORESET-BFR includes at least one of the following: a cell index of a cell on which the CORESET-BFR is located and a BWP index of a bandwidth part BWP on which the CORESET-BFR is located.