D2D Communication Terminal Network Control Adaptation
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Solution Overview
Problem
Current D2D communication technologies lack network control, particularly in disaster scenarios where base stations are unavailable, hindering effective communication and timely rescue operations.
Innovation Solution
A method where terminals determine whether to enable D2D communication based on network information, such as system messages and cell coverage results, allowing autonomous communication without relying on base stations, thereby enabling network control and facilitating communication in public security scenarios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If D2D communication is performed independently of the network, then communication can occur in disaster scenarios without base station support, but the network loses control over the communication
Solution Approach 1:
The patent implements dynamic D2D communication by allowing terminals to autonomously select resources and perform communication when base station support is unavailable, while maintaining network control when base stations are operational. The system dynamically switches between network-controlled and autonomous modes based on base station availability, resolving the contradiction between reliability in disasters and network control.
2Speed
If terminals autonomously discover available resources by scanning, then communication can be established quickly in disaster scenarios, but spectrum resource efficiency decreases
Solution Approach 1:
The patent changes the resource selection parameters based on base station availability. When base stations are available, terminals use network-scheduled resources with optimized parameters for spectral efficiency. When base stations are unavailable, terminals switch to autonomous resource selection with parameters optimized for rapid discovery and communication establishment, thus resolving the contradiction between speed and resource efficiency.
3Adaptability or versatility
If D2D communication is enabled without network control, then public security requirements are met, but transmit power increases due to lack of optimized resource allocation
Solution Approach 1:
The patent implements self-service D2D communication where terminals autonomously select resources and manage communication when base stations are unavailable, ensuring public security requirements are met. The system maintains network control for resource optimization when base stations are operational, thereby managing transmit power efficiently. This resolves the contradiction between adaptability to public security scenarios and energy consumption.
Data Source
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AI summary
The present invention provides a D2D communication method, a terminal, and a network device. The method includes: acquiring, by a first terminal, network information, where the network information includes a system message sent by a network device and/or a cell coverage result; determining, by the first terminal according to the network information, whether to enable D2D communication for autonomously discovering a second terminal; and if the first terminal determines to enable the D2D communication, discovering, by the first terminal, the second terminal autonomously, and performing the D2D communication with the second terminal directly. Embodiments of the present invention can meet a requirement that a network can be controlled.