D2D Relay Decision Using Indication Information
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Solution Overview
Problem
In Device to Device (D2D) communication, determining whether to relay a message from a second terminal to a third terminal through a first terminal is challenging, as existing methods lack clear criteria for the relay decision.
Innovation Solution
A data transmission method where a first terminal determines whether to relay a message to a third terminal based on indication information, including geographic location information, signal quality, terminal device sets, resource pools, and relay direction, allowing for flexible relay transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a first terminal receives a message from a second terminal and relays it to a third terminal in D2D communication, then data transmission rate and efficiency are improved, but the relay terminal may relay messages unnecessarily causing increased energy consumption and potential message loss
Solution Approach 1:
The patent applies preliminary action by pre-configuring indication information (such as geographic location conditions, signal quality thresholds, or terminal set memberships) in the message before relay. The first terminal evaluates these pre-set criteria to determine whether to relay, avoiding unnecessary relay operations and reducing energy consumption while maintaining efficient data transmission when conditions are met
2Reliability
If the first terminal relays all received messages to the third terminal, then message delivery reliability is improved, but the system complexity and difficulty of managing relay decisions increase
Solution Approach 1:
The patent applies parameter changes by introducing specific evaluation parameters (geographic location, signal quality, terminal set membership) that transform the complex relay decision problem into a series of simple parameter comparisons. The first terminal checks whether message parameters match pre-configured indication information, making the relay decision process systematic and manageable while ensuring reliable message delivery when conditions are satisfied
3Measurement precision
If the first terminal evaluates multiple parameters (geographic location, signal quality, terminal sets) before relaying, then relay decision accuracy is improved, but the processing time and complexity of the relay decision increase
Solution Approach 1:
The patent applies segmentation by dividing the relay decision process into independent parameter evaluations (geographic location check, signal quality check, terminal set membership check). Each parameter is evaluated separately against pre-configured indication information, allowing the terminal to process multiple criteria systematically without overwhelming complexity, thus achieving accurate relay decisions with manageable processing time
Data Source
AI summary
Embodiments of the present application provide a data transmission method and a data transmission device. The method includes: receiving, by a first terminal, a first message sent by a second terminal, where a target terminal of the first message is a third terminal; and determining, by the first terminal, whether to relay the first message to the third terminal according to indication information.