RLM and BFD Adjustment During DRX for Terminal Power Saving
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Solution Overview
Problem
Existing communication technologies require terminals to periodically perform Radio Link Monitor (RLM) and Beam Failure Detection (BFD) even when indicated to skip monitoring, which contradicts power-saving objectives during energy-saving modes.
Innovation Solution
A method and device that adjust RLM and BFD operations based on terminal information, network parameters, and environmental conditions to determine when to perform measurements, reducing unnecessary wake-ups and conserving power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminal performs RLM and BFD periodically according to requirements, then the reliability of radio link and beam is ensured, but the power consumption increases and power saving objective is compromised
Solution Approach 1:
The patent implements dynamic adjustment of RLM and BFD operations based on terminal state and network conditions. The terminal transitions between different measurement modes (full measurement, reduced measurement, or skipping) according to whether it is in DRX active time or extended DRX inactive time, and based on wake-up signal indications. This dynamic state-based adaptation resolves the contradiction by making the measurement behavior flexible rather than fixed, ensuring reliability when needed while saving power when possible.
Solution Approach 2:
The patent changes key parameters of RLM and BFD operations including measurement timing, measurement frequency, and measurement activation status based on network configuration and terminal state. The network can configure different measurement occasions, adjust measurement periodicity, and control whether measurements should be performed at all during certain DRX periods. These parameter changes enable the system to maintain reliability through adequate measurements while reducing power consumption by adjusting or skipping measurements during extended DRX inactive time.
2Use of energy by moving object
If the terminal skips monitoring PDCCH during DRX based on DCI or advance indication signal, then power saving is achieved, but the radio link reliability may be compromised without RLM/BFD
Solution Approach 1:
The patent applies partial action by performing only the minimum necessary RLM/BFD measurements required to ensure reliability, rather than continuous full measurements. During extended DRX inactive time, the terminal performs reduced or skipped measurements based on network configuration and wake-up signal indications. This partial measurement approach is sufficient to maintain acceptable reliability levels while achieving significant power savings by avoiding unnecessary wake-ups and measurements.
Data Source
AI summary
An RLM adjustment and/or BFD adjustment method and device are provided. The method includes: obtaining first information and/or parameters configured by a network side, the first information including one or more of the following: a measurement result of a terminal, status information of the terminal, environment information, and network coverage information, the parameters configured by the network side being used for determining whether to perform RLM measurement and/or BFD detection adjustment; and determining, according to the first information and/or the parameters configured by the network side, whether to perform the RLM measurement and/or BFD detection adjustment.