Sidelink Data Transmission Mode Selection in V2X Terminals
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current data transmission solutions in the Internet of Vehicles (IoV) system, particularly in LTE D2D and NR-V2X, face inefficiencies due to the inability to effectively manage multiple transmission modes simultaneously, leading to challenges in meeting data transmission demands.
Innovation Solution
A wireless communication method that enables terminal devices to send and receive sidelink data in multiple modes, such as transmission modes 3 and 4, and the mode introduced in Rel-16, by determining the appropriate mode based on different sidelink data situations, including propagation modes, access modes, and quality of service (QoS), to improve data transmission efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single transmission mode is used in V2X communication, then the system is simple to operate and manage, but it cannot meet the diverse data transmission demands as transmission demand increases
Solution Approach 1:
The patent implements dynamic transmission mode selection where the terminal device automatically switches between mode 3 and mode 4 based on real-time conditions such as whether the sidelink is established, QoS requirements, and propagation characteristics. This dynamic adaptation allows the system to handle diverse transmission demands without manual configuration, resolving the contradiction between versatility and complexity.
Solution Approach 2:
The patent changes the parameter of transmission mode selection based on different sidelink conditions, QoS parameters, and propagation modes. By adjusting which mode is active based on these parameters, the system achieves adaptability to various transmission demands while maintaining simple operation through automated parameter-based decision-making.
2Adaptability or versatility
If multiple transmission modes are supported simultaneously, then diverse data transmission demands can be met, but resource conflicts increase and transmission efficiency decreases
Solution Approach 1:
The patent employs dynamic mode selection that adapts to current sidelink conditions, ensuring that only the most appropriate mode is active at any given time. This prevents resource conflicts between modes while maintaining the flexibility to switch modes as conditions change, thereby preserving transmission efficiency alongside versatility.
Solution Approach 2:
The patent applies different transmission modes to different local conditions - mode 3 for controlled network environments with base station coordination, and mode 4 for autonomous sidelink scenarios. This localized application of appropriate modes ensures optimal performance for each specific situation without creating conflicts, maintaining both flexibility and efficiency.
3Reliability
If transmission resources are allocated by base station (mode 3), then resource allocation is centralized and controlled, but transmission delay increases compared to autonomous selection (mode 4)
Solution Approach 1:
The patent dynamically selects between base station-controlled resource allocation (mode 3) and autonomous resource selection (mode 4) based on whether a sidelink is established and current QoS requirements. When low delay is critical and sidelink conditions permit, the system switches to mode 4 for immediate autonomous resource selection, thereby reducing transmission delay while maintaining reliability through conditional mode switching.
4Loss of time
If autonomous resource selection (mode 4) is used, then transmission delay is reduced, but resource allocation control and reliability decrease
Solution Approach 1:
The patent changes the resource allocation control parameter based on sidelink establishment status and QoS requirements. When network coverage and sidelink conditions allow, autonomous mode 4 provides fast access with minimal delay. When network control is required for reliability, the system transitions to mode 3 with base station coordination. This parameter-based switching ensures both low delay and appropriate control levels are achieved based on specific operational conditions.
Data Source
Figure 1~4
Figure 5~7
AI summary
A wireless communication method and a terminal device are provided. The method includes: sending and/or receiving, by a first terminal device, sidelink data in at least two modes. Based on the above technical solution, the first terminal device sends and/or receives the sidelink data in at least two modes, so that the first terminal device can perform sending and/or receiving using different modes for different sidelink data, and thus can efficiently improve the efficiency of data transmission.