Beam Failure Recovery During DTX Inactive Time in Cellular Links
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Solution Overview
Problem
The challenge lies in balancing energy saving configurations of network devices with beam failure recovery processes in communication systems, particularly during inactive times when beam failure occurs in terminal devices.
Innovation Solution
A communication method and apparatus that enable terminal devices to perform beam failure recovery (BFR) during inactive times by skipping specific channels like CSI-RS and SR, and allowing contention-based random access (CBRA) when certain conditions are met, thereby reducing power consumption and ensuring efficient communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the network device configures inactive time for energy saving, then power consumption is reduced, but beam failure recovery cannot be performed during inactive time
Solution Approach 1:
The patent extracts beam failure recovery signals (CSI-RS for BFR and SR for BFR) from the set of channels subject to DTX suppression during inactive time. By excluding these specific signals from the general channel skipping rule, the system allows BFR operations to proceed even when other channels are suppressed for energy saving, thus resolving the contradiction between power consumption reduction and BFR capability maintenance
Solution Approach 2:
The patent introduces dynamic channel behavior during inactive time through DTX configuration, where channels can be selectively suppressed or maintained based on their importance. The first channel is dynamically skipped during inactive time while BFR-specific channels (CSI-RS and SR) are dynamically preserved, allowing the system to adapt between energy saving mode and reliable communication mode as needed
2Loss of energy
If the terminal device skips transmitting the first channel during inactive time, then energy saving is achieved, but beam failure recovery efficiency deteriorates
Solution Approach 1:
The patent extracts BFR-critical channels (CSI-RS for BFR and SR for BFR) from the general channel set that is suppressed during inactive time. This extraction ensures that while most channels are skipped to save energy, the essential BFR channels remain active, thereby maintaining high BFR efficiency without sacrificing power consumption benefits
Solution Approach 2:
The patent applies different transmission qualities to different channels during inactive time. The first channel is suppressed (lower quality/energy consumption) while BFR-specific channels are maintained (higher quality/reliability). This local differentiation of channel treatment allows the system to optimize both energy consumption and BFR efficiency simultaneously
Data Source
AI summary
Embodiments of this application provide a communication method and apparatus, a storage medium, and a chip system. The method includes: A terminal device receives first indication information from a network device, which indicates a first DTX configuration, the first DTX configuration includes skipping transmitting a first channel in a first cell within a first time period, and the first channel does not include one or more of the following signals: a CSI-RS used for BFR of the first cell or an SR used for the BFR of the first cell. After detecting a beam failure in the first cell, the terminal device performs BFR within the first time period based on the CSI-RS and/or the SR used for the BFR of the first cell. According to embodiments of this application, BFR may be performed within inactive time in an energy saving configuration, ensuring correct running of a communication system.