D2D Path Selection via Relay Discovery
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Solution Overview
Problem
In wireless communication systems, especially in D2D scenarios, terminal devices with long distances or varying channel quality often fail to perform direct communication effectively.
Innovation Solution
A path selection method where devices receive and modify discovery information to include their IDs and signal quality, allowing for the determination of optimal transmission paths, ensuring reliable communication even with long distances or changing channel conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If terminal devices perform direct D2D communication, then resource utilization and network capacity are improved, but communication reliability deteriorates when distance is long or channel quality changes greatly
Solution Approach 1:
The patent introduces a path selection mechanism that selects intermediate relay devices to forward data between source and destination devices. When direct D2D communication is not feasible due to long distance or poor channel quality, the system automatically routes data through one or more intermediate devices, thereby maintaining communication reliability while preserving the benefits of D2D resource utilization.
Solution Approach 2:
The patent implements dynamic path selection that adapts to changing channel conditions and device mobility. The system continuously monitors channel quality and device positions, dynamically adjusting the communication path between direct D2D, relay-assisted D2D, and network-based communication modes to maintain optimal reliability under varying conditions.
2Adaptability or versatility
If terminal devices with long distance attempt direct communication, then device mobility flexibility is maintained, but communication success rate deteriorates
Solution Approach 1:
The patent introduces a path selection mechanism that selects intermediate relay devices to forward data between source and destination devices. When direct D2D communication is not feasible due to long distance or poor channel quality, the system automatically routes data through one or more intermediate devices, thereby maintaining communication reliability while preserving the benefits of D2D resource utilization.
Solution Approach 2:
The patent implements dynamic path selection that adapts to changing channel conditions and device mobility. The system continuously monitors channel quality and device positions, dynamically adjusting the communication path between direct D2D, relay-assisted D2D, and network-based communication modes to maintain optimal reliability under varying conditions.
3Adaptability or versatility
If channel quality changes rapidly due to device mobility, then real-time communication adaptability is improved, but direct D2D communication stability deteriorates
Solution Approach 1:
The patent implements dynamic path selection that adapts to changing channel conditions and device mobility. The system continuously monitors channel quality and device positions, dynamically adjusting the communication path between direct D2D, relay-assisted D2D, and network-based communication modes to maintain optimal reliability under varying conditions.
Solution Approach 2:
The patent employs feedback mechanisms where devices report channel quality metrics and position information to the network. Based on this feedback, the system intelligently selects the most stable communication path, switching between direct and relayed D2D modes to maintain stability despite rapid channel changes.
Data Source
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AI summary
The present invention relates to the communications field, and discloses a path selection method, a device, and a system, to resolve a problem in the prior art that if a distance between two terminal devices performing direct communication is relatively long or channel quality changes relatively greatly, the two terminal devices cannot perform D2D communication. A specific solution is: A first device receives first discovery information sent by a second device, adds an ID of the first device to the first discovery information, and sends the first discovery information to which the ID of the first device is added, so that a destination device can determine a transmission path after receiving the first discovery information. The present invention is used for path selection.