P2P Probe Response Frame Capability Discovery

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Solution Overview

Problem

Current Wi-Fi P2P devices take a long time to obtain capability information of discovered devices through the device service discovery process specified in the IEEE 802.11 standard.

Innovation Solution

A method where a P2P device sends a probe request frame and receives a probe response frame from another P2P device, with the probe response frame including capability information of the second P2P device, allowing for the immediate acquisition of capability information during the device discovery phase.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of time

If the device service discovery process specified in the IEEE 802.11 standard is used to obtain capability information, then the capability information can be obtained, but the time consumed is relatively long

Engineering Contradiction:

Improvetime consumed to obtain capability informationVSAvoidspeed of device capability discovery

Core Design Contradiction:

Loss of timeVSProductivity

Solution Approach 1:

The capability information is included in the probe response frame sent during the device discovery phase, before the device service discovery process is completed. This preliminary inclusion of capability information allows the first P2P device to obtain the capability information of the second P2P device earlier, reducing the overall time consumption.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The capability information is merged into the probe response frame, which is already being sent during the device discovery phase. By combining the capability information transmission with the existing probe response mechanism, the patent avoids adding a separate time-consuming discovery process while still providing comprehensive capability information.

Inventive Principle:

Principle #5Merging (Combining)

2Ease of operation

If the traditional device service discovery process is used, then capability information is obtained through a specified process, but the process is complex and time-consuming

Engineering Contradiction:

Improvesimplicity of capability discovery processVSAvoidtime consumed in device service discovery

Core Design Contradiction:

Ease of operationVSLoss of time

Solution Approach 1:

The capability information is prepared and included in advance in the probe response frame, eliminating the need for a separate, complex device service discovery process. This preliminary action simplifies the overall operation by reducing the number of steps required.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The capability information is extracted from the complex device service discovery process and integrated into the probe response frame. This extraction allows the capability information to be obtained during the simpler device discovery phase rather than requiring the more complex service discovery process.

Inventive Principle:

Principle #2Taking out (Extraction)

Data Source

PatentUS12293126B2Device capability discovery method and P2P device

Publication Date: 2025.05.06 HUAWEI TECH CO LTD

AI summary

A device capability discovery method and a P2P device are provided, and relate to the communications field and the distributed hardware field, to shorten time consumed to obtain capability information of a discovered device. A P2P device receives a probe request frame from another device. The P2P device returns a probe response frame including capability information of the P2P device. A device that receives the probe response frame can obtain a capability of the device in a device discovery phase. Alternatively, a P2P device sends a probe request frame including capability information of the P2P device to another device, so that the another device can obtain a capability of the device in a device discovery phase.