UE Capability Signaling for Low-Power Wake-Up Reception
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Solution Overview
Problem
Current communication systems fail to utilize low-power wake-up signals effectively due to the network device's unawareness of the UE's capabilities related to low-power modules, leading to inefficient power consumption management.
Innovation Solution
The terminal device sends capability information to the network device indicating its support for receiving signals in specific frequency units, allowing the network to send low-power wake-up signals, thereby reducing power consumption by utilizing low-power modules.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the network device does not learn of the UE's capability related to the low-power module, then the device complexity is reduced, but the power consumption cannot be reduced
Solution Approach 1:
The terminal device performs preliminary action by reporting its low-power module capability information to the network device in advance through capability indication information. This allows the network device to proactively determine whether to send wake-up signals without needing to continuously query or maintain detailed capability databases, thus reducing power consumption while preserving necessary capability information.
Solution Approach 2:
The patent extracts only the essential capability information related to low-power module functionality from the terminal device and transmits it to the network device. This selective extraction of specific capability parameters (rather than comprehensive device information) enables the network to make informed decisions about wake-up signal transmission while minimizing information overhead and processing complexity.
2Adaptability or versatility
If the terminal device reports capability information with fine granularity for each frequency unit, then the adaptability is improved, but the device complexity increases
Solution Approach 1:
The patent applies local quality by enabling the terminal device to report capability information with different granularities for different frequency units. The device can indicate support for wake-up signals on a per-frequency-unit basis, allowing the network to tailor wake-up signal transmission to specific frequency configurations. This localized capability reporting provides fine-grained adaptability without requiring comprehensive reporting across all possible parameters and frequency units simultaneously.
Data Source
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AI summary
This application relates to a communication method, apparatus, and system. A terminal device sends a first message to a first network device, where the first message includes first capability information, the first capability information indicates whether the terminal device supports receiving of a first signal in at least one frequency unit, the terminal device includes a low-power module, and the low-power module is configured to receive the first signal. In embodiments of this application, the terminal device can notify an access network device of a capability that is of the terminal device and that is related to the low-power module, so that the access network device can send a signal like an LP-WUS to the terminal device based on the capability, and the terminal device can operate via the low-power module, to reduce power consumption of the terminal device.