Sidelink DRX Coordination for Lower Terminal Power Consumption
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Solution Overview
Problem
In sidelink (SL) communication, power consumption in terminal devices is not effectively reduced due to the lack of coordinated DRX configuration information and SL resource configuration information between base stations and terminal devices, especially when devices act as both data receive and transmit ends.
Innovation Solution
A communication method where a first communication device obtains and determines second DRX configuration information based on first information from a second communication device, aligning parameters to reduce power consumption while meeting service requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminal device continuously listens to the PDCCH to ensure effective data transmission, then the reliability of data reception is improved, but the power consumption increases
Solution Approach 1:
The patent implements discontinuous reception (DRX) mechanism where the terminal device periodically wakes up to listen to PDCCH during active time and enters sleep mode during inactive time. This periodic listening approach maintains data reception reliability while significantly reducing power consumption compared to continuous listening.
Solution Approach 2:
The patent dynamically adjusts the DRX configuration parameters (such as drx-OnDuration, drx-SlotOffset, drx-InactivityTimer) based on the terminal device's communication state, service requirements, and network conditions. This dynamic adaptation allows the system to optimize the balance between reliability and power consumption in real-time.
2Use of energy by moving object
If the terminal device uses DRX mechanism to reduce power consumption, then the power consumption is reduced, but the coordination between DRX configuration and SL resource configuration becomes complex
Solution Approach 1:
The patent merges DRX configuration with SL resource configuration by introducing a unified configuration mechanism where the network configures both DRX parameters and SL resource parameters together. This combined configuration approach simplifies the coordination complexity by treating them as an integrated system rather than separate configurations.
Solution Approach 2:
The patent introduces configuration parameters as intermediaries that link DRX operation with SL resource allocation. These parameters act as mediators to coordinate the terminal device's listening behavior with the sidelink resource availability, resolving the complexity of synchronization between the two configurations.
3Adaptability or versatility
If the terminal device acts as both data receive end and data transmit end in SL communication, then the communication versatility is improved, but the power consumption cannot be effectively reduced due to lack of coordinated configuration
Solution Approach 1:
The patent applies different DRX configuration strategies for different communication roles (receive end vs. transmit end). The terminal device can have role-specific DRX parameters that optimize power consumption for each function, allowing versatile communication while maintaining energy efficiency through localized optimization for each communication mode.
Data Source
AI summary
According to embodiments, after a second communication device determines first information, the second communication device sends the first information to a first communication device, so that the first communication device determines second DRX configuration information between the first communication device and the second communication device based on the first information. The first information includes first DRX configuration information and/or first SL resource configuration information from the second communication device. When the first communication device determines the second DRX configuration information, the first communication device refers to the first information sent by the second communication device, so that when the first communication device determines a configuration parameter of the second DRX configuration information, the first communication device may refer to the first information that has been configured by the second communication device.