Low-Power Wake-Up Receiver Timing for Interference-Aware 5G Detection
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Solution Overview
Problem
Existing communication systems face challenges in achieving efficient power management and reducing interference in low-power wireless communication, particularly in 5G NR systems, where high power consumption and interference from other sources impact battery life and performance.
Innovation Solution
Implementing a low-power wake-up receiver (LP-WUR) with a low-power signal (LP-WUS) that uses On-Off-Keying (OOK) modulation for reduced interference and power consumption, allowing switching between low-power (LR) and main radio (MR) operations based on preconfigured conditions to optimize power usage and measurement accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a low-power signal is used for wireless communication, then power consumption is reduced, but interference from other sources increases and affects measurement accuracy
Solution Approach 1:
The patent implements periodic monitoring of low-power signals at specific occasions rather than continuous monitoring. The sequence changes according to a predetermined rule at hopping intervals, creating a periodic pattern that allows the receiver to detect signals at predetermined times while remaining in low-power state otherwise, thus reducing overall power consumption while managing interference through structured periodic reception
2Measurement precision
If continuous monitoring of communication signals is performed, then measurement accuracy is improved, but power consumption increases
Solution Approach 1:
The receiver monitors low-power signals periodically at predetermined occasions rather than continuously. The monitoring occurs at specific intervals defined by hopping intervals, where the sequence changes according to a predetermined rule. This periodic approach maintains measurement accuracy at detection moments while significantly reducing power consumption by keeping the receiver in low-power state between monitoring occasions
Solution Approach 2:
The system pre-configures monitoring occasions and hopping intervals in advance. The receiver knows predetermined when to monitor for low-power signals based on pre-configured parameters, allowing it to prepare and activate at specific times for accurate measurement, then return to low-power state, thus balancing measurement accuracy with power efficiency
3Measurement precision
If hopping interval is shortened to improve signal detection, then measurement accuracy improves, but power consumption increases
Solution Approach 1:
The patent establishes an optimal periodic monitoring pattern where the receiver monitors at predetermined occasions with specific hopping intervals. The sequence changes according to a predetermined rule at these intervals, creating a balanced periodic schedule that provides sufficient signal detection opportunities while maintaining low-power operation between monitoring events, thus optimizing the trade-off between detection accuracy and power consumption
Data Source
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AI summary
A user equipment, UE, comprising a transceiver, which, in operation, monitors a plurality of occasions for reception of a low-power signal indicating at least one sequence; and circuitry, which, in operation, determines a hopping interval for the at least one sequence of the low-power signal, wherein the at least one sequence changes according to a predetermined rule at the hopping interval, wherein the transceiver, in operation, receives, on one of the plurality of occasions, the low-power signal.