PUCCH Secondary Cell Beam Reporting With Reduced Signaling Overhead
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Solution Overview
Problem
Existing communication systems face challenges in efficiently reporting beam information of physical uplink control channel (PUCCH) secondary cells during activation processes, leading to increased power consumption and signaling overheads.
Innovation Solution
A method where a terminal device reports beam information of a PUCCH secondary cell using layer 2 signaling through a primary or primary secondary cell, and optionally uses random access resources or periodic reporting based on predefined conditions to reduce overheads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminal device measures reference signal and reports beam information for every PUCCH secondary cell activation, then the network device can obtain accurate beam information, but power consumption and signaling overheads increase
Solution Approach 1:
The terminal device performs reference signal measurement and beam information reporting only when the PUCCH secondary cell is an unknown cell, rather than for all activation cases. This partial action approach avoids redundant measurements and reporting for known cells, thereby reducing power consumption and signaling overhead while maintaining necessary beam information accuracy for unknown cells
2Loss of information
If the terminal device performs reference signal measurement and beam reporting for all PUCCH secondary cell activations, then complete beam information is provided, but signaling overheads increase
Solution Approach 1:
The solution implements partial reporting by determining whether the PUCCH secondary cell is unknown before performing measurement and reporting. For known cells, beam information reporting is skipped entirely, reducing signaling overhead. For unknown cells, complete beam information is reported to ensure information completeness where needed
3Reliability
If the terminal device performs reference signal measurement for activation, then beam information is obtained, but processing time and power consumption increase
Solution Approach 1:
The terminal device performs reference signal measurement only when the PUCCH secondary cell is determined to be unknown, avoiding unnecessary measurement processing for known cells. This reduces both processing time and power consumption while ensuring beam information is available when actually needed for unknown cells
Data Source
AI summary
A beam information reporting and receiving method and apparatus are disclosed. The method at least includes: A terminal device receives first activation signaling from a network device, where the first activation signaling is used to activate a first cell, and the first cell is a secondary cell that has a capability of sending a physical uplink control channel PUCCH. The terminal device measures a reference signal of the first cell to determine beam information of the first cell. The terminal device sends layer 2 signaling to the network device by using a second cell, where the layer 2 signaling includes the beam information of the first cell, and the second cell is a primary cell or a primary secondary cell corresponding to the first cell.