Multi-Link Device Classification for Neighbor Discovery

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Solution Overview

Problem

The existing methods for wireless network AP discovery are inefficient due to the high number of available channels in the 6 GHz spectrum, especially with the introduction of Multi-Link capable devices in IEEE 802.11be, leading to significant overhead in scanning and association processes for Client Devices.

Innovation Solution

Infrastructure-guided supervised AP discovery provides client-specific Reduced Neighbor Reports (RNRs) and channelization Information Elements (IEs) tailored to each Client Device's capabilities, reducing scanning time and preserving bandwidth by transmitting neighbor details as unicast instead of broadcast or multicast.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of information

If traditional broadcast or multicast methods are used to transmit neighbor reports to Client Devices, then all devices can receive the information, but significant bandwidth is consumed and scanning time increases due to the high number of available channels in the 6 GHz spectrum

Engineering Contradiction:
Improveneighbor report delivery completenessVSAvoidbandwidth consumption
Core Design Contradiction:
Loss of informationVSLoss of energy

Solution Approach 1:

The patent segments the neighbor report transmission by classifying Client Devices into different groups based on their capabilities (specifically ML capability). Instead of transmitting a single comprehensive neighbor report to all devices, the system divides the information transmission into targeted segments - sending reduced neighbor reports only to non-ML capable devices and leveraging ML capability for faster association to other APs. This segmentation reduces overall bandwidth consumption while ensuring each device receives appropriate information.

Inventive Principle:
Principle #1Segmentation

2Loss of information

If comprehensive neighbor reports are transmitted to all Client Devices, then complete AP discovery information is provided, but scanning time increases significantly due to the large amount of data to process

Engineering Contradiction:
ImproveAP discovery information completenessVSAvoidscanning and association time
Core Design Contradiction:
Loss of informationVSLoss of time

Solution Approach 1:

The patent applies local quality by providing different levels of neighbor report information based on the specific capabilities and needs of each Client Device. Non-ML capable devices receive reduced neighbor reports with essential information for their capabilities, while ML capable devices utilize their multi-link capability for faster association. This tailored approach ensures each device receives information appropriate to its local characteristics, reducing processing time while maintaining necessary discovery completeness.

Inventive Principle:
Principle #3Local quality

3Adaptability or versatility

If the system supports both ML capable and non-ML capable devices, then device compatibility is improved, but the complexity of managing different discovery methods increases

Engineering Contradiction:
Improvedevice capability compatibilityVSAvoidneighbor discovery management complexity
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent implements dynamics by making the neighbor report transmission adaptive based on real-time detection of Client Device capabilities. The system dynamically determines whether a device is ML capable or not and adjusts the transmission method accordingly - using reduced neighbor reports for non-ML devices and enabling ML association for capable devices. This dynamic adaptation allows the system to support multiple device types without requiring complex manual configuration, as the system automatically adjusts its behavior based on device characteristics.

Inventive Principle:
Principle #15Dynamics

Data Source

PatentUS12010746B2Multi-link device classification based neighbor discovery
Publication Date: 2024.06.11 CISCO TECHNOLOGY INC
  • US12010746B2 patent drawing
  • US12010746B2 patent drawing
  • US12010746B2 patent drawing

AI summary

Optimization of radio communications of a wireless network of a local site may be provided. A probe frame or an association frame may be received from a Client Device (CD) operating in the local site that identifies at least one operating class and Multi-Link (ML) capability information of the CD. Channel information of at least one Access Point (AP) having ML capability in the local site may be embedded in a probe response frame or in an association response frame based on the at least one operating class and the ML capability information of the CD. The probe response frame or the association response frame that includes the channel information of the at least one AP having ML capability in the local site may be transmitted, as unicast, to the CD.