Sidelink DRX Alignment for Low-Power UE Data Transmission
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Solution Overview
Problem
User equipment (UE) in wireless networks experiences increased power consumption due to continuous listening to the Physical Downlink Control Channel (PDCCH), which is addressed by implementing a Discontinuous Reception (DRX) mechanism, and the introduction of sidelink communication for direct UE-to-UE communication introduces inconsistencies in DRX parameters, leading to inefficient power usage.
Innovation Solution
The DRX parameters of a sidelink are determined by the DRX parameters of a Uu port, ensuring consistent on duration and sleep periods between Uu port and sidelink communication, thereby reducing power consumption by aligning the DRX parameters for UE communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If DRX mechanism is implemented to reduce power consumption, then power consumption is reduced, but communication efficiency deteriorates due to inconsistent DRX parameters between Uu port and sidelink
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the DRX parameter of the sidelink based on the DRX parameter of the Uu port. When the Uu port DRX parameter changes (e.g., on duration, sleep period, cycle length), the sidelink DRX parameter is correspondingly adjusted to maintain consistency, thereby optimizing power consumption while preserving communication efficiency across both interfaces.
2Adaptability or versatility
If sidelink communication is introduced for direct UE-to-UE communication, then communication flexibility is improved, but power consumption increases due to inconsistent DRX parameters
Solution Approach 1:
The patent resolves this contradiction by dynamically adjusting the sidelink DRX parameter to match the Uu port DRX parameter. This ensures that the UE can utilize sidelink communication for direct UE-to-UE communication (improving flexibility) while avoiding unnecessary wake-ups and maintaining consistent power consumption patterns across both communication interfaces.
3Adaptability or versatility
If DRX parameters are independently configured for Uu port and sidelink, then configuration flexibility is improved, but on duration and sleep period consistency deteriorates
Solution Approach 1:
The patent applies parameter changes by establishing a dependency relationship where the sidelink DRX parameter is derived from or adjusted based on the Uu port DRX parameter. This ensures that when the Uu port DRX configuration changes, the sidelink DRX configuration is correspondingly updated, maintaining consistency in on duration and sleep periods while still allowing flexible configuration through base station control.
Data Source
AI summary
The present disclosure relates to a data transmission method and apparatus and a communication device. The data transmission method comprises: according to a discontinuous reception (DRX) parameter of a sidelink, which parameter is determined by means of a Uu port DRX parameter of a first user equipment (UE), performing data transmission between the first UE and second UE by means of the sidelink during a wake-up period of the first UE.