Smartphone Bluetooth Scan Frequency Control for Power Optimization
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Solution Overview
Problem
Smartphones consume excessive power during Bluetooth signal detection due to high scan frequency and long scan periods, leading to increased power consumption.
Innovation Solution
A communication system that includes a control unit to adjust the scan frequency based on the state of the camera application, either increasing it for immediate detection in the foreground or reducing it for power conservation in the background, and an electronic apparatus that transmits a wireless signal indicating its presence with information on connectivity, allowing the smartphone to adjust its scanning accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the smartphone performs signal detection processing at a high scan frequency to ensure immediate detection of the digital camera, then the detection speed and reliability are improved, but the power consumption of the smartphone increases significantly
Solution Approach 1:
The patent applies dynamics by making the scan frequency adjustable rather than fixed. The smartphone dynamically changes the scan frequency based on the detected signal characteristics - using high frequency when advertisement packets are detected to ensure reliable connection, and low frequency during normal operation to conserve power. This dynamic adjustment resolves the contradiction between detection reliability and power consumption.
Solution Approach 2:
The patent changes the parameter of scan frequency based on different operational states. When the digital camera transmits advertisement packets indicating availability for connection, the smartphone increases scan frequency to detect these packets reliably. When no such packets are detected, the smartphone reduces scan frequency to minimize power consumption. This parameter change strategy effectively balances detection reliability with energy efficiency.
2Ease of operation
If the digital camera constantly transmits advertisement packets to maintain discoverability for connection, then the ease of connection is improved, but the power consumption of the digital camera increases
Solution Approach 1:
The patent implements periodic action by having the digital camera transmit advertisement packets only during specific periods when connection is desired or needed, rather than continuously. The camera can enter low-power states between these periodic transmission intervals, reducing overall power consumption while still maintaining the ability to be discovered when needed. This periodic transmission strategy resolves the contradiction between connection ease and power consumption.
Data Source
AI summary
A communication apparatus comprises a communication unit that wirelessly communicates with an electronic apparatus present within a predetermined range, a detection unit that detects a wireless signal transmitted from the electronic apparatus at a predetermined frequency, and a control unit that performs a function to control the electronic apparatus via the communication unit. The control unit changes the predetermined frequency according to the state of the function.