Beam Failure Recovery During DTX Inactive Time in Cellular Links
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Solution Overview
Problem
The challenge of balancing energy saving and beam failure recovery in network devices, particularly during inactive cycles, is unresolved in existing communication systems.
Innovation Solution
A communication method and apparatus that enable beam failure recovery (BFR) during inactive time by skipping specific channels like CSI-RS and SR, allowing terminal devices to perform BFR efficiently while reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by stationary object
If the network device configures inactive cycles for energy saving, then power consumption is reduced, but beam failure recovery cannot be performed during inactive time
Solution Approach 1:
The patent segments the channel transmission by identifying specific channels (CSI-RS for BFR and SR for BFR) that should be excluded from the inactive cycle restriction. This allows the terminal to perform beam failure recovery while other channels remain suppressed during inactive periods, thus resolving the contradiction between energy saving and recovery capability.
Solution Approach 2:
The patent applies different transmission rules to different channels: most channels are suppressed during inactive cycles for energy saving, but BFR-related channels (CSI-RS and SR) are allowed to transmit during inactive periods when needed. This localized differentiation resolves the contradiction by allowing critical recovery functions while maintaining overall energy efficiency.
2Reliability
If the terminal transmits all channels during inactive time, then beam failure recovery can be performed, but power consumption increases
Solution Approach 1:
The terminal segments channel transmission by selectively activating only BFR-related channels (CSI-RS and SR) during inactive periods when beam failure occurs, while keeping other channels suppressed. This selective approach enables recovery functionality while minimizing power consumption during inactive cycles.
Solution Approach 2:
The terminal dynamically adjusts channel transmission behavior based on the occurrence of beam failure. During normal inactive periods, all channels are suppressed for energy saving; when beam failure is detected, the terminal dynamically activates BFR-related channels to perform recovery, thus balancing power consumption and reliability dynamically.
3Reliability
If the network device continuously transmits all channels, then communication quality is maintained, but energy consumption increases
Solution Approach 1:
The patent applies different transmission strategies to different channels based on their function. Critical BFR channels (CSI-RS and SR) maintain transmission during inactive periods when needed for recovery, while non-critical channels are suppressed. This localized quality differentiation maintains communication quality for essential functions while reducing overall energy consumption.
Solution Approach 2:
The network device employs periodic inactive cycles where most channels are suppressed to save energy, but BFR channels can transmit when needed. This periodic action pattern maintains communication quality by ensuring BFR capability remains available while significantly reducing overall energy consumption during normal operation.
Data Source
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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, where the first indication information 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 beam failure recovery BFR of the first cell or an SR used for the BFR of the first cell. After the terminal device detects a beam failure in the first cell, the terminal device performs BFR within the first time period based on the CSI-RS used for the BFR of the first cell 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, to ensure correct running of a communication system.