User Equipment Sidelink Switching for Air-Interface Link Failure
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Solution Overview
Problem
In communication technologies, especially in V2X scenarios, when an air-interface link fails, existing systems are unable to successfully transmit data, leading to disruptions in information transmission between user equipment.
Innovation Solution
A method and apparatus that enable user equipment to switch to sidelink communication when the air-interface link is unable to transmit data normally, by receiving indication information from a base station and using configured sidelink resources for data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If air-interface link is used for data transmission, then communication coverage and network management are improved, but transmission reliability deteriorates when the air-interface link fails
Solution Approach 1:
The system dynamically switches between air-interface link and sidelink based on the operational status of the air-interface link. When the air-interface link fails, the user equipment automatically transitions to using the sidelink for data transmission, ensuring continuous communication without manual intervention.
Solution Approach 2:
The system changes the transmission parameter by switching the communication mode from air-interface link to sidelink. This parameter change allows the system to adapt to different link conditions and maintain transmission reliability when the primary link fails.
2Reliability
If sidelink communication is enabled as backup, then transmission reliability is improved, but device complexity increases
Solution Approach 1:
The user equipment is designed with multi-functionality, capable of operating on both air-interface link and sidelink. This universal design allows the device to use the primary air-interface link for normal operations and automatically switch to the sidelink when needed, without requiring separate dedicated devices for each mode.
Solution Approach 2:
The sidelink resources are pre-configured by the network before the air-interface link failure occurs. This preliminary configuration ensures that when the failure happens, the user equipment can immediately switch to the pre-configured sidelink without needing to perform complex real-time resource allocation, thereby reducing the complexity during the switching process.
3Productivity
If automatic link switching is implemented, then communication continuity is improved, but control complexity increases
Solution Approach 1:
The system implements a feedback mechanism where the user equipment monitors the status of the air-interface link and automatically triggers a switch to sidelink when failure is detected. This feedback-driven approach ensures communication continuity while automating the link management process, reducing the need for complex manual control.
Solution Approach 2:
The user equipment performs self-service by automatically detecting air-interface link failures and switching to sidelink without requiring complex external control. The device autonomously manages the link switching based on its own status monitoring, simplifying the overall control complexity while maintaining communication continuity.
Data Source
AI summary
This disclosure provides an information transmission method and apparatus and communication system. The method includes: receiving, by a user equipment, indication information transmitted by a base station indicating that the user equipment is capable of using the sidelink in a case where the air-interface link is incapable of normally transmitting data; and using the sidelink by the user equipment to perform data transmission with another user equipment in the case where the air-interface link is incapable of normally transmitting data. Hence, even if in a case where an air-interface link is unable to transmit data normally, data information may be transmitted successfully in other links.