Sidelink DRX On-Duration Coordination for Reliable Data Transfer
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Solution Overview
Problem
The introduction of Discontinuous Reception (DRX) mechanism in sidelink transmission for power saving in terminal devices leads to reliability issues in unicast and multicast communication, as the receiving end may not be in a monitoring state when data is sent.
Innovation Solution
A first terminal device acquires DRX configuration information to determine the continuously monitoring duration of a second terminal device and sends sidelink data within this duration, ensuring both devices align their monitoring states for reliable data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If DRX mechanism is introduced for power saving, then energy consumption is reduced, but transmission reliability deteriorates
Solution Approach 1:
The transmitting terminal device sends indication information in advance to notify the receiving terminal device of the data transmission time. The receiving device uses this information to determine its monitoring duration and ensure it is in the monitoring state when data is transmitted, thereby maintaining reliability while using DRX for power saving.
Solution Approach 2:
The system uses DRX configuration information and indication information exchange between transmitting and receiving terminals to coordinate their monitoring and transmission states. This feedback mechanism ensures that data is sent only when the receiving device is actively monitoring, resolving the reliability issue while maintaining power savings.
2Reliability
If terminal device monitors continuously for reliable reception, then transmission reliability is improved, but energy consumption increases
Solution Approach 1:
The receiving terminal device uses DRX to periodically monitor for data transmissions instead of continuous monitoring. It enters sleep mode during off-duration and wakes up during on-duration to check for data, achieving power saving while maintaining reliable reception through periodic checking coordinated with the transmitter's indication information.
Solution Approach 2:
The transmitting device sends indication information in advance about when data will be transmitted. The receiving device uses this preliminary information to activate its monitoring function only during the specified time window, avoiding continuous monitoring and reducing energy consumption while ensuring reliable reception.
3Reliability
If DRX on duration is extended to ensure data reception, then transmission reliability is improved, but power saving effect deteriorates
Solution Approach 1:
The system dynamically adjusts the monitoring duration parameter based on the indication information received. Instead of using a fixed long on-duration, the receiving device calculates and uses an optimized monitoring duration that is sufficient to receive the indicated data transmission, achieving both reliability and power saving through parameter optimization.
Data Source
AI summary
The embodiments of the disclosure provide a data transmission method and apparatus, a parameter adjustment method and apparatus, and a terminal device. The data transmission method comprises: a first terminal device acquiring first discontinuous reception (DRX) configuration information, the first DRX configuration information being used for determining a continuously monitoring duration of a second terminal device, and the first terminal device sending the sidelink data to the second terminal device within the continuously monitoring duration of the second terminal device.