Dual Wireless Interface Wake-Up Mechanism for Mobile Devices
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Solution Overview
Problem
Mobile communication devices with Wi-Fi interfaces face reduced functionality and missed notifications due to power-saving sleep modes, which limit device usage and battery life, as they cannot receive communications when in sleep mode, unlike devices with persistent communication channels.
Innovation Solution
Incorporating a second wireless network interface, such as a cellular module, to generate notifications that wake the primary wireless network interface from sleep mode, enabling data message reception by initiating a voice call when a data message fails to transmit, thus allowing the device to switch from sleep to active mode.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the wireless network interface is placed in sleep mode to reduce power consumption, then battery life is improved, but the device cannot receive communications through the wireless network interface
Solution Approach 1:
A secondary wireless network interface acts as an intermediary to receive wake-up notifications from external systems. When the primary interface is in sleep mode, the secondary interface receives communication requests and sends wake-up signals to the primary interface, enabling indirect communication during power-saving states.
Solution Approach 2:
The wireless communication functionality is segmented into two independent interfaces: a primary interface for data communication that can enter sleep mode, and a secondary interface for receiving wake-up notifications. This segmentation allows the system to maintain communication availability while achieving power savings by keeping only the necessary interface active.
2Duration of action of stationary object
If the wireless network interface is placed in sleep mode to extend battery life, then power consumption is reduced, but important notifications are missed
Solution Approach 1:
The secondary wireless network interface serves as a mediator that intercepts communication requests intended for the primary interface. It receives wake-up notifications from external systems and forwards this information to the primary interface, ensuring no notifications are lost even when the primary interface is in sleep mode.
Solution Approach 2:
The secondary interface performs preliminary action by receiving wake-up notifications before the primary interface needs to be activated. This allows the system to prepare for incoming communications while in power-saving mode, ensuring timely delivery of important notifications.
3Reliability
If a persistent communication channel is maintained to ensure notification delivery, then communication availability is improved, but power consumption increases
Solution Approach 1:
The communication system is segmented into two functional components: a persistent secondary interface that maintains minimal power consumption for receiving wake-up signals, and a power-saving primary interface that enters sleep mode between communications. This segmentation enables reliable notification delivery without requiring continuous high power consumption.
Solution Approach 2:
Instead of maintaining a continuously active persistent communication channel, the system uses periodic wake-up notifications triggered by incoming communications. The secondary interface periodically checks for wake-up signals and activates the primary interface only when needed, replacing continuous operation with periodic action to reduce power consumption.
Data Source
AI summary
A mobile communication device enables improved connectivity and power management. The device includes a first wireless network interface configured for connection to a first network and a second wireless network interface configured for connection to a second network. The first interface has an active mode of operation and a sleep mode. The device places the first interface in the sleep mode when not needed for communications. An external system such as a messaging server calls the device when it is unable to access the device through the first interface. The second network, which can be a cellular network, handles the call request and transmits a ringing signal to the second interface of the device. A notification handler, upon receipt of the ringing signal, wakes the first interface, permitting normal communications through the first interface. Power management logic can be more pro-active in placing the first interface into the sleep mode.