Wake-Up Link Measurement for Low-Power Neighbor Cell Paging
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Solution Overview
Problem
Existing terminal devices face high power consumption due to periodic enabling of the main link for RRM measurement and mobility management, especially in RRC idle or inactive states, which degrades mobility management performance.
Innovation Solution
Implement a wake-up method using a wake-up link to measure signals and determine if the main link needs to be woken up based on measurement quantities like RSRP and RSSI, reducing the need for periodic main link activation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the main link is periodically enabled to perform RRM measurement for mobility management, then mobility management performance is maintained, but power consumption increases significantly
Solution Approach 1:
The patent segments the measurement function into two parts: the wake-up link performs basic signal strength measurement (RSSI of wake-up signal), while the main link performs comprehensive RRM measurement only when needed. This segmentation allows the terminal to maintain mobility management capability through wake-up link measurements while avoiding frequent main link activation, thus reducing power consumption while preserving essential mobility functionality.
Solution Approach 2:
The patent implements preliminary action by having the wake-up link perform measurement operations before the main link is activated. The terminal measures the RSSI of the wake-up signal received on the wake-up link, and based on this preliminary measurement result, decides whether to activate the main link for further RRM measurement. This preliminary measurement avoids unnecessary main link activation and reduces overall power consumption.
2Use of energy by moving object
If the main link is disabled in RRC idle or inactive state to reduce power consumption, then power consumption decreases, but mobility management capability deteriorates
Solution Approach 1:
The patent introduces the wake-up link as an intermediary that maintains basic measurement capability when the main link is disabled. The wake-up link continuously monitors the RSSI of wake-up signals, providing ongoing mobility management information without requiring the energy-intensive main link to remain active. This intermediary measurement mechanism preserves essential mobility management capability while keeping the main link disabled to save power.
Solution Approach 2:
The patent applies partial action by having the wake-up link perform only essential measurement functions (RSSI measurement of wake-up signal) rather than complete RRM measurement. This partial measurement approach provides sufficient information for basic mobility management decisions while consuming significantly less power than full main link operation, thus maintaining adequate mobility capability with reduced energy expenditure.
Data Source
AI summary
Embodiments of this application provide a wake-up method and apparatus and system configured to execute the method, including a main link and a wake-up link or a chip system in the terminal device, in which the main link is used for transmission of a paging message, and the wake-up link is used for transmission of a wake-up signal to determine whether to wake up the main link. The method may include measuring, by using the wake-up link, a first signal transmitted over the wake-up link to obtain a first measurement quantity of the first signal. The first measurement quantity may include at least one of first reference signal received power (RSRP), a first received signal strength indicator (RSSI), and first reference signal received quality (RSRQ). The method may further include determining, based on the first measurement quantity, whether to wake up the main link.