MAC CE Channel Parameter Signaling for Multi-TRP Networks
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Solution Overview
Problem
Existing channel information signaling methods in multi-CC, multi-BWP, or multi-TRP scenarios suffer from high signaling overheads and delays during updating, activation, or indication of channel information.
Innovation Solution
The network device uses a MAC CE command to update, activate, or indicate parameter information of a first channel or reference signal, allowing the terminal device to determine the parameter information of a second channel or reference signal under various preset conditions, including configurations in multi-CC, multi-BWP, or multi-TRP scenarios, thereby reducing signaling overheads and delays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If traditional separate indication methods are used for different channels and reference signals, then each channel can be configured independently, but signaling overheads and delays increase significantly
Solution Approach 1:
The patent combines the indication of spatial relation information for multiple channels (PUCCH, PUSCH, SRS) and reference signals into a single MAC CE command. The MAC CE simultaneously updates the first channel and the second channel with the same spatial relation information, reducing the number of separate signaling messages needed while maintaining the ability to configure different channels independently when required
2Reliability
If multiple MAC CE commands are sent to update channel information for different channels and reference signals, then each channel can be configured accurately, but the time delay increases
Solution Approach 1:
The patent configures multiple channels and reference signals with the same spatial relation information through a single MAC CE command in advance. This preliminary action ensures that all channels are ready with appropriate spatial relations before data transmission begins, eliminating the need for sequential updates and reducing overall configuration delay while maintaining configuration accuracy
Data Source
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AI summary
Embodiments of this application disclose a channel information determining method, a network device, and a terminal device. The method includes: updating, activating, or indicating parameter information of a first channel or a first reference signal RS by using a media access control MAC control element CE command, where the parameter information of the first channel or the first reference signal RS is used for determining the parameter information of a second channel or a second RS under a preset condition; and the parameter information includes at least one of transmission configuration indicator TCI state information, spatial relation information, and path loss PL RS.