Adaptive Wireless Advertisement Rate for Low-Latency Discovery

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Solution Overview

Problem

Mobile computing devices face a trade-off between power consumption and latency in transmitting wireless advertisement signals for device discovery, with high transmission rates consuming excessive power and low rates resulting in high latency.

Innovation Solution

A mobile computing device determines the distance to a remote device and adjusts the transmission rate of wireless advertisement signals accordingly, increasing the rate as the device approaches the remote device to balance power consumption and latency.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of time

If wireless advertisement signals are transmitted at a high constant rate (e.g., every 100 milliseconds), then device discovery latency is reduced, but power consumption increases excessively

Engineering Contradiction:

Improvedevice discovery latencyVSAvoidpower consumption

Core Design Contradiction:

Loss of timeVSUse of energy by moving object

Solution Approach 1:

The patent applies dynamics by transitioning from a static constant transmission rate to a dynamic adaptive transmission rate. The system continuously monitors distance to the remote device and adjusts the advertisement signal transmission rate in real-time, increasing the rate when the device is close (reducing latency) and decreasing the rate when far (conserving power). This dynamic adjustment resolves the contradiction between low latency and low power consumption.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes the transmission rate parameter based on distance conditions. When the mobile computing device detects that it is within a threshold distance of a remote device, it increases the transmission rate parameter (e.g., from every 1.28 seconds to every 100 milliseconds). When beyond the threshold distance, it maintains a lower transmission rate. This parameter change strategy allows the system to optimize both latency and power consumption under different operational conditions.

Inventive Principle:

Principle #35Parameter changes

2Use of energy by moving object

If wireless advertisement signals are transmitted at a low constant rate (e.g., every 1.28 seconds), then power consumption is minimized, but device discovery latency increases significantly

Engineering Contradiction:

Improvepower consumptionVSAvoiddevice discovery latency

Core Design Contradiction:

Use of energy by moving objectVSLoss of time

Solution Approach 1:

The system uses dynamic adjustment of transmission rate based on real-time distance measurement. When the mobile computing device is far from the remote device, it transmits at a low rate to conserve power. When the device approaches and enters the threshold distance, the system automatically increases the transmission rate to ensure rapid discovery and connection, thus resolving the latency issue only when necessary.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The transmission rate parameter is changed conditionally based on distance thresholds. The system maintains a baseline low transmission rate (e.g., every 1.28 seconds) for power efficiency, but dynamically increases it (e.g., to every 100 milliseconds) when distance conditions indicate that rapid discovery is needed. This conditional parameter change resolves the contradiction between power consumption and latency.

Inventive Principle:

Principle #35Parameter changes

3Productivity

If transmission rate is increased to reduce discovery latency, then responsiveness improves, but battery life is reduced

Engineering Contradiction:

Improvediscovery responsivenessVSAvoidbattery life

Core Design Contradiction:

ProductivityVSDuration of action of stationary object

Solution Approach 1:

The patent implements dynamic transmission rate adjustment that correlates responsiveness with actual need. The system monitors distance and only increases transmission rate (improving responsiveness) when the device is close to the remote device. When far away, it maintains low transmission rate to preserve battery life. This dynamic behavior ensures high responsiveness only when necessary, resolving the contradiction between productivity and duration.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system changes the transmission rate parameter based on distance-triggered conditions. When distance to the remote device is within threshold, the transmission rate parameter increases to improve discovery responsiveness. When beyond threshold, the parameter remains at a lower value to extend battery life. This conditional parameter adjustment resolves the contradiction between responsiveness and battery duration.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS20250203337A1Balanced power-latency advertisements for mobile computing device discoverability

Publication Date: 2025.06.19 GOOGLE LLC

AI summary

Balanced power-latency advertisements for mobile computing devices allow a mobile computing device to be discovered by a remote device at low latency and without excessive power consumption. The mobile computing device determines, based on the wireless signals received from the remote device, a distance between the mobile computing device and the remote device. Responsive to determining whether the distance satisfies a threshold distance, the mobile computing device transmits the wireless advertisement signals at greater rate. The wireless advertisement signals identify the mobile computing device to the remote device causing the remote device to discover the mobile computing device.