D2D Signal Discovery via Network-Configured Resources
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Solution Overview
Problem
Current LTE systems lack a mechanism for direct communication and discovery between User Equipment (UEs), relying solely on network-controlled communication, which limits peer-to-peer communication capabilities.
Innovation Solution
A method and device for transmitting Device-to-Device (D2D) signals, where a first UE obtains transmission resource configuration information from the network to transmit a D2D signal, and a second UE searches for the D2D signal using reception resource configuration information to discover the first UE, allowing direct communication between UEs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If network-controlled communication is adopted in LTE systems, then communication reliability is improved, but direct communication capability between UEs deteriorates
Solution Approach 1:
The communication mode is segmented into network-controlled mode and direct communication mode. The system can selectively switch between these modes based on service requirements, enabling both reliable network-controlled communication and flexible direct communication between UEs.
Solution Approach 2:
The system dynamically switches between network-controlled communication and direct communication modes. The network can allocate resources for D2D communication and UEs can transition between connected and idle states, providing adaptive communication capability that balances reliability and directness.
2Adaptability or versatility
If D2D signal transmission is enabled, then direct communication between UEs is improved, but resource management complexity increases
Solution Approach 1:
The network acts as an intermediary that provides semi-persistent resource allocation for D2D communication. The network configures resources once and UEs can use them autonomously without continuous network control, reducing the complexity of real-time resource management while maintaining network oversight.
Solution Approach 2:
The network performs preliminary resource allocation before D2D communication begins. Resources are pre-configured and assigned to UEs, eliminating the need for complex real-time resource negotiation and management during actual D2D transmission.
3Productivity
If UEs transmit D2D signals autonomously, then communication efficiency is improved, but network control capability deteriorates
Solution Approach 1:
UEs autonomously select and use pre-configured resources for D2D signal transmission without continuous network intervention. This self-service approach improves communication efficiency by reducing network overhead while the network maintains control through initial resource allocation and configuration.
Data Source
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AI summary
A method and device for sending signals and configuration information and finding terminals, which relate to the field of wireless communications and are used for solving the problem of how terminals find each other. In the present invention, a first terminal sends a D2D signal according to sending resource configuration information about the D2D signal acquired from a network side, and a second terminal searches for the D2D signal according to receiving resource configuration information about the D2D signal acquired from the network side and determines that the corresponding first terminal is found when finding the D2D signal. It can be seen that the present solution solves the problem of how terminals find each other.