D2D Communication Configuration for Power Saving
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Solution Overview
Problem
In Device to Device (D2D) communication, the D2D receiving UE needs to constantly listen to system broadcasts or preconfigured receive resources, leading to significant power consumption.
Innovation Solution
A method and device for configuring communication that determines a target communication period, allowing terminals to perform direct communication interface transmission and reception without constant listening to system broadcasts or preconfigured resources, by exchanging configuration information such as DRX and DTX settings via a direct communication interface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the D2D receiving UE constantly listens to system broadcasts or preconfigured receive resources, then the reliability of D2D communication is improved, but the power consumption increases significantly
Solution Approach 1:
The patent implements discontinuous reception (DRX) and discontinuous transmission (DTX) mechanisms that enable D2D receiving UEs to listen periodically rather than continuously. The UE can wake up at predetermined intervals to check for D2D signals and then return to sleep mode, thereby maintaining communication reliability while significantly reducing power consumption during idle periods
Solution Approach 2:
The patent establishes a feedback mechanism where D2D receiving UEs send acknowledgment signals to transmitting UEs to confirm successful reception. This feedback system allows the receiving UE to stop listening after confirming receipt of data, reducing unnecessary power consumption while ensuring reliable communication through explicit acknowledgment
2Adaptability or versatility
If the D2D receiving UE listens constantly to system broadcasts, then the D2D discovery capability is improved, but the complexity of the receiving UE increases
Solution Approach 1:
The patent pre-configures D2D receiving UEs with resource pools and listening schedules before actual D2D communication begins. The network side provides pre-configuration information including time-frequency resources and parameters, allowing the UE to operate with simplified logic during actual D2D discovery and communication phases
Data Source
AI summary
The embodiments of the present invention are relate to wireless communications. In the embodiments of the present invention, a first terminal determines configuration information for determining a target communication period, wherein the target communication period is a period in which direct communication interface sending and/or receiving can be performed by means of a direct communication interface; and the first terminal determines the target communication period according to the configuration information and notifies a second terminal of the configuration information by means of the direct communication interface, so that the terminal performing direct communication determines the target communication period according to the configuration information and performs direct communication interface sending and/or receiving in the target communication period. Therefore, there is no need to continuously monitor a system broadcast or continuously monitor a pre-configured D2D receiving resource, thereby saving power.