Antenna Panel Reporting for New Radio Link Failure Recovery
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Solution Overview
Problem
In a new radio communications system, when a link failure occurs, the terminal device's original uplink may fail, and the antenna panel change results in reduced communication efficiency as the uplink signal cannot be sent on the new link.
Innovation Solution
The terminal device reports antenna panel information in a link failure recovery request message, allowing the network device to recover the uplink signal transmission efficiently by indicating the appropriate antenna panel for signal transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminal device uses the original antenna panel for uplink transmission after link failure recovery, then the link connection can be reestablished, but the uplink signal cannot be sent on the new link resulting in reduced communication efficiency
Solution Approach 1:
The terminal device performs preliminary action by determining and reporting the antenna panel information for the new link in advance (in the BFRQ message) before the network device needs to receive uplink signals. This allows the network device to be prepared in advance with the correct antenna panel configuration, avoiding the problem of using the wrong original antenna panel after link recovery.
Solution Approach 2:
The terminal device provides feedback to the network device by reporting the antenna panel information of the new link through the BFRQ message. This feedback mechanism enables the network device to adjust its receiving configuration accordingly, ensuring that the uplink signals are received on the correct antenna panel and resolving the contradiction between link recovery and communication efficiency.
2Device complexity
If the terminal device does not report antenna panel information in the link failure recovery request message, then the message structure remains simple, but the network device cannot recover uplink signal transmission in time resulting in reduced link reliability
Solution Approach 1:
The terminal device includes antenna panel information in the BFRQ message as a preliminary action, so that when the network device receives the link failure recovery request, it already has the necessary information to configure the correct antenna panel for receiving uplink signals. This preliminary provision of information ensures timely recovery of uplink transmission without adding significant complexity to the message structure.
Data Source
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AI summary
This application provides a communication method and a communications apparatus. The method includes: determining first antenna panel information; sending a link failure recovery request message, where the link failure recovery request message indicates the first antenna panel information; and sending an uplink signal based on the first antenna panel information. When a link between a terminal device and a network device fails, and the terminal device requests the network device to recover the link, in the method, information about an antenna panel for sending an uplink signal is indicated by using a link failure recovery request message. For example, the terminal device may indicate, in an explicit or implicit manner, the information (a panel ID) about the antenna panel. Therefore, the network device may learn of information about an antenna panel corresponding to a new link or information about a currently available (or referred to as active) antenna panel, to recover transmission of the uplink signal in time, thereby improving link recovery reliability.