Sidelink DRX Periodicity Alignment for Beam Failure Recovery
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Solution Overview
Problem
In wireless communication systems, the discontinuous reception (DRX) mode can interfere with beam failure detection resources, leading to undetected sidelink communication link failures, resulting in unnecessary transmissions and resource wastage, and making it difficult to reestablish the link due to differing sleep states of UEs.
Innovation Solution
Configuring the periodicity of the DRX mode based on the periodicity of beam failure detection reference signals to minimize interference and ensure timely detection of link failures, allowing for efficient recovery of sidelink communication links.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If DRX mode is used to save power, then energy consumption is reduced, but beam failure detection reliability deteriorates
Solution Approach 1:
The patent dynamically adjusts the DRX configuration by setting the periodicity of awake states to match the periodicity of beam failure detection reference signals. This dynamic alignment ensures that the UE is awake precisely when beam failure detection signals are transmitted, resolving the contradiction between power saving and detection reliability.
Solution Approach 2:
The patent changes the temporal parameters of DRX operation by configuring the periodicity of awake states based on the beam failure detection signal periodicity. This parameter adjustment ensures synchronization between DRX wake-up moments and beam failure detection opportunities, maintaining reliability while preserving energy savings.
2Use of energy by moving object
If DRX periodicity is not aligned with beam failure detection signals, then power saving is improved, but link failure detection speed deteriorates
Solution Approach 1:
The patent applies preliminary action by pre-configuring the DRX periodicity to match the beam failure detection signal periodicity before operation begins. This ensures that the UE is already synchronized with the detection signal timing, eliminating delays in failure detection while maintaining power-saving operation.
Solution Approach 2:
The patent modifies the temporal parameters of DRX by setting the periodicity of awake states equal to the periodicity of beam failure detection reference signals. This parameter change ensures that wake-up moments coincide with detection opportunities, achieving both fast detection and power efficiency.
3Use of energy by moving object
If UEs operate in different sleep states, then individual power management is optimized, but link reestablishment difficulty increases
Solution Approach 1:
The patent applies universality by establishing a common synchronization mechanism based on beam failure detection signal periodicity that both UEs follow. This universal reference point allows UEs to independently manage their DRX cycles while ensuring they can simultaneously be awake for detection and reestablishment operations.
Solution Approach 2:
The patent uses feedback through the beam failure detection reference signals that provide a common temporal reference for both UEs. This feedback mechanism allows each UE to adjust its DRX operation to align with the detection signal timing, ensuring coordinated wake-up moments for failure detection and link reestablishment.
Data Source
AI summary
Aspects of the present disclosure provide techniques for standalone sidelink beam failure recovery. A method performed by a first user equipment includes communicating, while operating in a sidelink discontinuous reception (DRX) mode, with a second UE on a first communications link between the first UE and the second UE; transmitting, during an awake state of the sidelink DRX mode, at least one beam failure detection reference signal of a plurality of beam failure detection reference signals associated with the first communications link, wherein a periodicity of the awake state of the sidelink DRX mode is based on a periodicity for transmitting the plurality of beam failure detection reference signals; and detecting that the first communications link between the first UE and the second UE has failed based on the at least one beam failure detection reference signal.