Mobile Device Motion-Based Polling Rate Control
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Solution Overview
Problem
Conventional passive entry/passive start systems require user-initiated actions to wake up portable access devices, leading to increased power consumption and reduced battery life in mobile devices used for vehicle access.
Innovation Solution
A mobile device equipped with a sensor and control module that detects movement, transmits signals to a vehicle, and adjusts polling rates or transitions to sleep mode based on proximity and movement, reducing power consumption by ceasing unnecessary advertising and optimizing communication with the vehicle's access module.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the mobile device continuously polls and advertises presence to the vehicle, then the vehicle can reliably detect the device and enable passive entry, but the power consumption increases and battery life decreases
Solution Approach 1:
The patent applies dynamics by making the polling rate adjustable rather than fixed. The mobile device dynamically changes its polling rate based on whether it is in motion or stationary. When moving, it polls at a higher rate to ensure reliable detection; when stationary, it reduces the polling rate to conserve battery power, thus resolving the contradiction between reliable detection and power consumption.
Solution Approach 2:
The patent changes the parameter of polling rate based on the device's motion state. The control module receives motion status information and adjusts the polling rate parameter accordingly - maintaining a higher rate when the device is moving and reducing it when stationary. This parameter adaptation allows the system to balance reliability and power efficiency under different operating conditions.
2Duration of action of moving object
If the mobile device reduces polling rate to save power, then battery life is extended, but the reliability of passive entry may be compromised
Solution Approach 1:
The system dynamically adjusts the polling rate based on motion status. When the mobile device is stationary, the reduced polling rate extends battery life while still maintaining sufficient reliability for passive entry. When motion is detected, the system automatically increases the polling rate to ensure reliable vehicle detection and passive entry functionality, thus resolving the contradiction between battery life and reliability.
Solution Approach 2:
The mobile device autonomously monitors its own motion status and self-adjusts its polling rate without external intervention. The control module receives motion information from sensors and automatically modifies the advertising behavior, enabling the device to serve itself in optimizing the balance between power consumption and entry reliability based on real-time conditions.
3Loss of information
If the mobile device advertises presence continuously, then the vehicle can maintain awareness of the device location, but unnecessary power is consumed when the device is moving away
Solution Approach 1:
The patent extracts the unnecessary advertising activity when the mobile device is determined to be moving away from the vehicle. The control module identifies motion patterns indicating departure and selectively stops or reduces advertising in these scenarios. This extraction of redundant operations eliminates unnecessary power consumption while preserving location awareness when the device is approaching or stationary near the vehicle.
Solution Approach 2:
Instead of continuously advertising presence at full intensity, the system applies partial action by reducing or ceasing advertising when motion indicates the device is moving away. This partial advertising approach maintains sufficient location awareness for active users while avoiding excessive power consumption from unnecessary transmissions when the user is departing.
Data Source
AI summary
A mobile device is provided and includes a sensor and a control module. The sensor is configured to detect movement of the mobile device. The control module is configured to: based on an output of the sensor, determine whether the mobile device is moving; when the mobile device is moving, transmit via a transceiver at least one signal to a vehicle indicating movement of the mobile device and an indication of presence of the mobile device; based on the at least one signal, receive an instruction signal or an information signal from the vehicle via the transceiver; based on the instruction signal or an information signal, at least one of reduce a polling rate of the mobile device, cease to indicate presence of the mobile device or transition to a sleep mode; and transition from the sleep mode to an awake mode in response to movement of the mobile device.