Wireless Base Station Wakeup Device In-Band Activation
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Solution Overview
Problem
Existing wireless communication systems face challenges in reducing power consumption and efficiently activating wireless base stations using the same frequency band for normal wireless communications, as they often require additional circuitry for detecting wake-up signals and cannot activate in-band communication devices effectively.
Innovation Solution
A wireless base station design incorporating a main device and a wake-up device, where the wake-up device receives and demodulates low-power wake-up signals in the same frequency band used for normal wireless communications to transition the main device from sleep mode to operating mode, allowing for reduced power consumption and efficient activation using the same communication band.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a wireless base station uses separate out-of-band communication to activate the in-band communication device, then the base station can be activated from sleep mode, but it cannot use the same frequency band for both activation and normal wireless communications
Solution Approach 1:
The wakeup device is designed to receive wakeup signals in the same in-band frequency that the main communication device uses for normal wireless communications. This allows a single frequency band to serve dual purposes: both activation (wakeup) and normal data transmission, eliminating the need for separate out-of-band communication channels and enabling the base station to fully utilize its communication bandwidth.
2Difficulty of detecting and measuring
If the wireless base station uses existing wireless circuitry for detecting wakeup signals, then detection is possible, but power consumption cannot be sufficiently reduced
Solution Approach 1:
The wireless base station is divided into two functional segments: a wakeup device with simplified circuitry dedicated solely to receiving and detecting wakeup signals, and a main communication device that handles normal wireless communications. The wakeup device can remain in a low-power state with only essential detection circuits active, while the main device enters sleep mode. This segmentation allows wakeup signal detection with minimal power consumption while maintaining full communication capability when activated.
3Use of energy by moving object
If the main device transitions to sleep mode to reduce power consumption, then power usage decreases, but the base station cannot receive or process communications from terminal devices
Solution Approach 1:
The wakeup device acts as an intermediary between terminal devices and the main communication device. When the main device is in sleep mode, terminal devices can still transmit wakeup signals that are received and processed by the wakeup device. The wakeup device then activates the main device, ensuring that communication capability is restored when needed while maintaining power savings during idle periods.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution significantly reduces power consumption and enables seamless activation of wireless base stations from sleep to operating mode using the same frequency band for normal wireless communications, improving efficiency and reducing power usage.
Implementation Method 1
the wakeup signal having been modulated by a modulation technique with a transmission rate lower than that for data transmission and reception by the main device in the operating mode
Data Source
AI summary
A wireless base station (1) includes a wakeup device (13) and a main device (14). When the main device (14) is in a sleep mode, the wakeup device (13) is connected to the antenna (11). Then, when the wakeup device (13) receives a wakeup signal for activating the wireless base station (1) from a terminal device assigned to the wireless base station (1) in a communication band used for wireless communication with the terminal device and when the information for identifying a wireless base station to be activated contained in the received wakeup signal is identical with the identification information of the wireless base station (1), the wakeup device (13) outputs a driving signal to the main device (14). The main device (14) transitions from the sleep mode to an operating mode in response to the driving signal from the wakeup device (13).