Uplink Beam Selection via Network Feedback
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Solution Overview
Problem
Terminal devices face challenges in determining the appropriate beam or beam group for transmitting uplink signals to network devices, leading to potential inefficiencies in signal reception performance.
Innovation Solution
A method where the terminal device receives first information from the network device to determine a target beam or beam group for transmitting uplink signals, allowing the network device to accurately receive the signals by using the specified beam or beam group, which may involve sounding signals and beamforming processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If beamforming technology is adopted for uplink signal transmission, then transmission performance is improved, but the terminal device cannot determine which beam or beam group is directed to the network side
Solution Approach 1:
The network device provides feedback information (first information) to the terminal device, indicating the target beam or beam group. This feedback mechanism enables the terminal device to determine the appropriate beam for uplink transmission by receiving indication from the network side, resolving the contradiction between improved transmission performance and beam selection capability.
2Device complexity
If the terminal device transmits uplink signals without knowing the appropriate beam, then device complexity is reduced, but network device receiving performance deteriorates
Solution Approach 1:
The first information acts as an intermediary that carries beam indication from the network device to the terminal device. This intermediary mechanism allows the terminal device to operate with reduced complexity while the network device maintains optimal receiving performance through proper beam indication and selection.
Data Source
AI summary
Provided are a method for transmitting an uplink signal, a terminal device and a network side device. The method comprises: a terminal device receives first information sent by a network side device, the first information being used for the terminal device to determine a beam or beam group used for sending an uplink signal to the network side device; according to the first information, the terminal device determines a target beam or target beam group for sending the uplink signal; the terminal device uses the target beam or target beam group to send the uplink signal to the network side device. The present invention improves the uplink signal reception performance of the network side device.