Wireless Reference Signal Scheduling for Terminal Power Saving
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless communication systems face challenges in determining CSI-RS/TRS transmission occasions for terminal devices in RRC idle/inactive states, leading to unnecessary power consumption due to frequent time-frequency tracking and AGC operations.
Innovation Solution
The method determines a target RS transmission occasion set based on the detection or transmission of a power-saving signal, such as a PEI, to optimize RS detection and reduce power consumption by identifying available TRS/CSI-RS occasions for time-frequency tracking and multi-beam transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If terminal devices perform detection in all CSI-RS/TRS transmission occasions, then time-frequency tracking accuracy is improved, but power consumption increases
Solution Approach 1:
The network device transmits a power-saving signal in advance to indicate whether the terminal device needs to perform detection in upcoming CSI-RS/TRS transmission occasions. This preliminary indication allows the terminal device to prepare accordingly and avoid unnecessary detection operations, resolving the contradiction between tracking accuracy and power consumption.
Solution Approach 2:
The power-saving signal acts as a feedback mechanism from the network to the terminal device, providing information about whether detection is required in future transmission occasions. This feedback loop enables dynamic adjustment of detection behavior, allowing the terminal to maintain tracking accuracy when needed while saving power when detection is not required.
2Use of energy by moving object
If terminal devices skip detection in some CSI-RS/TRS transmission occasions, then power saving is improved, but time-frequency tracking reliability deteriorates
Solution Approach 1:
By receiving advance indication through the power-saving signal, the terminal device can perform detection in advance when needed, ensuring tracking reliability is maintained before actual transmission occasions. This preliminary preparation allows the terminal to skip detection only when truly unnecessary while maintaining reliability when required.
3Reliability
If the network transmits RS signals frequently for multi-beam transmission, then transmission reliability is improved, but network overhead and terminal processing load increase
Solution Approach 1:
The power-saving signal provides feedback information that allows the terminal device to intelligently determine when to perform detection for multi-beam transmission. This feedback mechanism enables the terminal to process RS signals only when necessary, reducing processing load while maintaining transmission reliability through selective detection based on network indications.
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
Methods and devices for wireless communication are provided in implementations of the disclosure, which can determine a position of an available reference signal (RS) (such as tracking reference signal (TRS) and/or channel state information-reference signal (CSI-RS)) transmission occasion set, thereby realizing time-frequency tracking and power saving of a terminal device, and realizing RS (such as TRS and/or CSI-RS) multiple-beam (multi-beam) transmission. The method includes the following. A first device determines a target RS transmission occasion set according to whether a power-saving signal is detected or transmitted on a target resource set, and/or, according to content indicated by the power-saving signal. The power-saving signal indicates whether a terminal device is to monitor in a target paging occasion (PO) a physical downlink control channel (PDCCH) carrying paging indication information, and the target RS transmission occasion set contains RS transmission occasions for transmitting an RS.