Sidelink Transmission Configuration for Cross-Version LTE V2X
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Solution Overview
Problem
Existing V2X communication systems face challenges in ensuring transmission quality due to the incompatibility of R14 and R15 LTE V2X terminal devices, as the core network cannot dynamically adjust tx profiles based on real-time sidelink status, leading to suboptimal transmission quality for services requiring compatibility across all devices.
Innovation Solution
A radio access network device obtains configuration information to dynamically adjust tx profiles based on real-time sidelink status, generating indication information to guide terminal devices on optimal transmission modes, including technology type, air interface, and radio access technology, thereby enhancing transmission quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the core network device uses static tx profile configuration, then device compatibility is improved, but transmission quality deteriorates
Solution Approach 1:
The patent introduces dynamic tx profile adjustment by enabling the radio access network device to sense real-time sidelink status and generate indication information that dynamically configures transmission parameters. This transforms the static configuration into a dynamic system that adapts to changing channel conditions, resolving the contradiction between static compatibility and dynamic transmission quality.
Solution Approach 2:
The patent implements a feedback mechanism where the radio access network device senses the sidelink status and provides indication information back to terminal devices. This feedback loop enables the system to adjust tx profiles based on real-time conditions, allowing both device compatibility and transmission quality to be maintained through continuous adaptation.
2Adaptability or versatility
If the core network device determines tx profile, then service-level configuration is improved, but real-time sidelink adaptation deteriorates
Solution Approach 1:
The patent segments the configuration function between the core network device and the radio access network device. The core network device determines service-level tx profiles while the radio access network device handles real-time adjustments based on sidelink status. This segmentation allows both service-level configuration and real-time adaptation to coexist effectively.
Solution Approach 2:
The radio access network device acts as an intermediary between the core network device and terminal devices. It receives service-level configuration from the core network, senses real-time sidelink conditions, and generates indication information that combines both service requirements and current channel status, enabling real-time adaptation without losing service-level configuration benefits.
3Productivity
If R15 physical layer features are used, then transmission efficiency is improved, but compatibility with R14 devices deteriorates
Solution Approach 1:
The patent uses parameter changes to resolve the contradiction between R15 transmission efficiency and R14 compatibility. The radio access network device generates indication information that dynamically adjusts transmission parameters (such as MCS table selection, rate matching configuration) based on the capabilities of receiving devices. This allows R15 features to be used when appropriate while maintaining compatibility with R14 devices through parameter adaptation.
Data Source
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AI summary
This application relates to the field of communications technologies, and discloses a communication method and a device, to improve transmission quality of a service. The method includes: A radio access network device obtains configuration information, where the configuration information is used by a terminal device to transmit service data on a sidelink, and the configuration information includes any one or more of the following configuration parameters: a technology type, an air interface, a radio access technology, and a mode that are used by the terminal device to transmit the service data on the sidelink, where the sidelink is a wireless communication link between the terminal device and another terminal device; and the radio access network device generates indication information based on the configuration information, and the radio access network device sends the indication information to the terminal device, to indicate the terminal device to transmit the service data on the sidelink based on the indication information.