D2D Relay Communication With DRX for Reduced Power Consumption
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing D2D communication technologies, particularly in FeD2D and V2X communications, face high power consumption due to short resource pool cycles, which is not optimized for efficient and stable communication.
Innovation Solution
The remote user equipment acquires the DRX parameter of the relay user equipment through D2D discovery messages, allowing for optimized message transmission times to reduce power consumption and enhance communication efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the resource pool cycle is shortened to enable FeD2D and V2X communications, then communication responsiveness is improved, but power consumption increases
Solution Approach 1:
The patent applies periodic action by implementing DRX (Discontinuous Reception) cycles where the remote UE alternates between active monitoring periods and sleep periods. The UE monitors D2D discovery messages only during specific time windows within the resource pool cycle rather than continuously, enabling communication responsiveness while reducing power consumption through periodic rather than continuous operation.
Solution Approach 2:
The patent changes the parameter of resource pool cycle length dynamically. For traditional D2D communication, a long resource pool cycle is used to reduce power consumption. For FeD2D and V2X communications, the cycle is shortened to improve responsiveness. The system adapts the cycle parameter based on communication type and requirements, resolving the contradiction between speed and energy consumption.
2Reliability
If the remote UE continuously monitors D2D discovery messages, then communication reliability is improved, but power consumption increases
Solution Approach 1:
The patent implements periodic monitoring of D2D discovery messages through DRX cycles. The remote UE wakes up at predetermined intervals to monitor for discovery messages from relay UEs, then returns to sleep mode. This periodic action maintains communication reliability by ensuring the UE checks for messages regularly while dramatically reducing power consumption compared to continuous monitoring.
Solution Approach 2:
The system enables the remote UE to autonomously manage its own power consumption by implementing self-service DRX operations. The UE independently determines when to wake and sleep based on configured parameters, managing its own energy resources without requiring continuous network control, thus maintaining reliability while conserving power.
Data Source
Figure 1~2
Figure 3
Figure 4
AI summary
Embodiments of the present invention disclose a D2D communication method, a remote user equipment, and a relay user equipment. The method includes: receiving, by a remote user equipment, a D2D discovery message sent by a relay user equipment and acquiring a discontinuous reception parameter of the relay user equipment; and sending a communication request message to the relay user equipment based on the discontinuous reception parameter of the relay user equipment. By adopting the embodiment of the present invention, power consumption of a D2D link may be reduced.