Side-Channel Attribute Updates for Extended-Sleep Devices

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Solution Overview

Problem

Existing closed-circuit television systems face a trade-off between power consumption and latency due to the use of wideband wireless channels for intermittent traffic and low-throughput message exchanges, leading to inefficient battery life and unacceptable latency in security systems.

Innovation Solution

Implementing a dual-channel communication strategy for power-constrained devices, using a high-throughput channel for normal operation and a low-power, low-throughput side channel for power-saving modes, with a digital twin or proxy node managing communications during sleep periods.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Speed

If the wideband wireless physical channel frequently polls for trigger signals or remains always on to reduce latency, then the response time is improved, but power consumption increases substantially

Engineering Contradiction:

Improveresponse timeVSAvoidpower consumption

Core Design Contradiction:

SpeedVSUse of energy by moving object

Solution Approach 1:

The communication channel is segmented into two separate channels: a wideband wireless physical channel for high-throughput video feeds and a low-power side channel for low-throughput trigger signals. This segmentation allows each channel to be optimized independently, with the side channel consuming minimal power while the wideband channel remains active only when needed for video transmission.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

A side channel acts as an intermediary for transmitting trigger signals between sensors and security cameras. This intermediary channel enables reliable trigger signal transmission without requiring the high-power wideband channel to be continuously active, thus resolving the contradiction between response time and power consumption.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Use of energy by moving object

If the wideband wireless physical channel uses a long polling interval to conserve power, then power consumption is reduced, but latency increases substantially

Engineering Contradiction:

Improvepower consumptionVSAvoidlatency

Core Design Contradiction:

Use of energy by moving objectVSLoss of time

Solution Approach 1:

The communication function is segmented into two separate channels with different characteristics. The side channel is specifically designed for low-latency trigger signal transmission, eliminating the need for long polling intervals while the wideband channel can operate with longer intervals for power savings.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The system changes the parameters of the communication channel by introducing a side channel with different throughput and power consumption characteristics. This parameter change enables the system to achieve low latency for critical trigger signals without the power consumption penalty of keeping the wideband channel continuously active.

Inventive Principle:

Principle #35Parameter changes

3Speed

If the wideband wireless physical channel is always on to capture intermittent traffic quickly, then latency is reduced, but battery life is reduced

Engineering Contradiction:

Improveresponse timeVSAvoidbattery life

Core Design Contradiction:

SpeedVSDuration of action of stationary object

Solution Approach 1:

The communication system is segmented into two independent channels: a wideband channel for video feeds and a side channel for trigger signals. This segmentation allows the side channel to remain active with minimal power consumption, ensuring quick response to triggers while preserving battery life, whereas the wideband channel can be powered down when not transmitting video.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The side channel serves as an intermediary that handles trigger signal transmission with minimal power consumption. This intermediary enables the system to maintain responsiveness to security events while avoiding the excessive battery drainage that would result from keeping the high-power wideband channel continuously active.

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS20250300932A1Handling attribute updates and commands between a power-constrained device with an extended sleep duration and another node using a side channel

Publication Date: 2025.09.25 SILICON LABORATORIES INC

AI summary

A network of devices includes a power-constrained device that uses two separate physical channels associated with different wireless communications protocols to communicate with a device and to communicate directly or indirectly with a controller. In an embodiment, the two separate physical channels include a dedicated high-power, high-throughput physical channel of a primary wireless communications protocol that is used to communicate with the controller in a normal mode of operation and a side channel, which is a lower power, lower throughput physical channel of a secondary wireless communications protocol to receive triggers from sensors and that may be used to directly or indirectly communicate with the controller in the normal mode of operation or in a lower power mode of operation. In an embodiment, the dedicated high-power, high-throughput physical channel is configured in a lower power state (e.g., idle or off) while a sleepy node is in a power-saving mode.