D2D Terminal Multi-RAT RRC Reporting for Cross-Network Coordination
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Solution Overview
Problem
Current device-to-device (D2D) communication technologies are limited to Long Term Evolution (LTE) and lack the ability to operate effectively in multi-Radio Access Technology (RAT) and cross-RAT scenarios, restricting their applicability and efficiency in advanced communication frameworks like Vehicle to Everything (V2X).
Innovation Solution
A method where terminal devices operate in D2D communication modes based on multiple RATs, reporting Radio Resource Control (RRC) information to network devices operating in different RATs, enabling D2D communication across various radio access technologies, such as NR and LTE, and allowing for simultaneous operation using different interfaces and protocols.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If D2D communication is limited to LTE only, then the system is simpler to implement, but the applicability and versatility are reduced
Solution Approach 1:
The terminal device is designed to support multiple RATs (LTE and NR) within a single D2D communication framework. The device can simultaneously or alternatively operate in LTE-based D2D mode and NR-based D2D mode, making it universal across different radio access technologies. This multi-functionality allows the same hardware and software platform to serve multiple communication standards without requiring separate dedicated systems for each RAT.
Solution Approach 2:
The D2D communication system implements dynamic RAT selection and switching capabilities. The terminal device can adaptively choose between LTE and NR based on available network conditions, service requirements, and resource availability. This dynamic behavior allows the system to transition between different RATs seamlessly, optimizing performance based on real-time conditions while maintaining a unified D2D communication architecture.
2Adaptability or versatility
If D2D communication operates in cross-RAT scenarios, then the service coverage is expanded, but the resource management complexity increases
Solution Approach 1:
The network device serves as an intermediary that coordinates and manages D2D communication resources across different RATs. It receives D2D service information from terminal devices operating in various RATs, processes this information centrally, and provides appropriate resource allocation and configuration. This intermediary approach simplifies the resource management burden on individual terminal devices by centralizing the complex cross-RAT resource coordination functions in the network infrastructure.
Solution Approach 2:
The D2D communication system segments the resource management functions into RAT-specific modules and a common coordination layer. Each RAT (LTE and NR) has its own resource management procedures and parameters, while a higher-layer coordination mechanism handles the interactions between different RATs. This segmentation allows independent optimization of each RAT's resource management while providing a structured approach to managing cross-RAT scenarios through modular architecture.
3Adaptability or versatility
If multiple RATs are supported in D2D communication, then the service information coverage is improved, but the information reporting overhead increases
Solution Approach 1:
The system merges D2D service information reporting across multiple RATs into a unified RRC message structure. Instead of maintaining separate reporting mechanisms for LTE and NR, the invention combines the service information elements into a single standardized RRC message format that can carry information about D2D services across different RATs. This merging reduces the total information overhead by eliminating redundant reporting and allowing the network to process cross-RAT service information through a single integrated signaling path.
Data Source
AI summary
Disclosed are a method for sending information, a terminal device and a network device. The method for sending information is applied to the terminal device that operates at least in a device-to-device (D2D) communication mode based on a first radio access technology (RAT). The method includes the terminal device sending Radio Resource Control (RRC) information to the network device operating in a second RAT. The RRC information includes service information of D2D communication based on the first RAT.