Cellular-Assisted WiFi Scanning for Low-Power Wireless Stations

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Solution Overview

Problem

Existing wireless communication systems face high power consumption due to unnecessary scanning of WiFi frequencies by the WiFi modem, especially when the device is not within the WiFi network's coverage, leading to increased battery drain.

Innovation Solution

Offload the scanning of WiFi frequencies to the cellular modem, which can operate in a low power mode while scanning both cellular and WiFi frequencies, reducing power consumption by transitioning the WiFi modem to a low power or complete power down mode when not in use.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the WiFi modem continuously scans WiFi frequencies to detect network availability, then the device can quickly establish WiFi connections when in range, but power consumption increases significantly

Engineering Contradiction:

ImproveWiFi connection availabilityVSAvoidpower consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The cellular modem acts as an intermediary that performs WiFi frequency scanning on behalf of the WiFi modem. The cellular modem scans WiFi frequencies, detects available networks, and provides this information to the WiFi modem, allowing the WiFi modem to remain in low-power mode while still maintaining connection awareness.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The cellular modem is designed to perform multiple functions beyond cellular communication, including WiFi frequency scanning and network detection. This multi-functionality allows the system to reduce overall power consumption by consolidating scanning tasks in a single modem that can operate efficiently in both cellular and WiFi detection modes.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Use of energy by moving object

If the WiFi modem is completely powered down to save energy, then power consumption is minimized, but the device experiences delays in establishing WiFi connections when entering network coverage

Engineering Contradiction:

Improvepower consumptionVSAvoidconnection establishment delay

Core Design Contradiction:

Use of energy by moving objectVSLoss of time

Solution Approach 1:

The cellular modem performs preliminary WiFi frequency scanning and network detection before the WiFi modem needs to establish a connection. By having the cellular modem continuously monitor WiFi frequencies and pre-identify available networks, the system prepares connection information in advance, allowing the WiFi modem to quickly activate and connect when entering coverage areas without experiencing detection delays.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS20260032588A1Wireless communication systems

Publication Date: 2026.01.29 INTEL CORP

AI summary

A wireless station may include one or more processors. The wireless station may receive a no wireless fidelity (WiFi) signal indicating a parameter. The wireless station may also provide a scan signal comprising a scan list indicating a WiFi frequency band that a cellular modem is to scan for a WiFi signal based on the parameter. In addition, the wireless station may provide a mode signal based on the no WiFi signal. The mode signal may indicate that a WiFi modem is to enter a low power mode. Further, the wireless station may receive a detect signal indicating that the cellular modem detected the WiFi signal within the WiFi frequency band. The wireless station may provide a wake-up signal configured to cause the WiFi modem to enter an operational mode, the wake-up signal indicating a frequency of the detected WiFi signal.