AP MLD Key Sharing Across Coordinated Wi‑Fi Access Points

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Solution Overview

Problem

The IEEE 802.11be standard lacks a mechanism for handling communication keys when multiple physically different access points are coordinated to operate as a single logical AP MLD, affecting the convenience of connections with station devices.

Innovation Solution

A communication apparatus is designed to establish links, generate encryption keys, and share these keys among multiple physically different access points functioning as a single logical AP MLD, enhancing connection convenience.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If multiple physically different access points are coordinated to operate as one logical AP MLD, then mobility of communication and usability are improved, but there is no conventional mechanism for handling communication keys managed by the AP MLD

Engineering Contradiction:

ImproveusabilityVSAvoidkey management complexity

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

Multiple physically different access points are merged to operate as a single logical AP MLD, sharing a common upper MAC layer and communication key management. This allows the APs to function collectively while maintaining unified key handling, resolving the contradiction by combining physical resources without complicating key management.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The AP MLD is designed with universal key management capability that serves multiple physical access points simultaneously. The single logical entity manages communication keys for all associated STAs across different APs, providing multi-functional key handling that simplifies operations while supporting multiple physical interfaces.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Ease of operation

If multiple physically different access points are coordinated to operate as one logical AP MLD, then connection convenience with station devices is enhanced, but key sharing mechanism is not conventionally considered

Engineering Contradiction:

Improveconnection convenienceVSAvoidkey information management

Core Design Contradiction:

Ease of operationVSLoss of information

Solution Approach 1:

The logical AP MLD acts as an intermediary between multiple physical APs and STAs for key management. It receives, generates, and distributes communication keys centrally, mediating the key information flow between physical interfaces and ensuring proper key distribution without loss or management issues.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The communication key management system creates and distributes key copies to appropriate APs and STAs through the logical AP MLD. The key information is replicated and distributed to all necessary components while maintaining security and consistency, preventing information loss through systematic copying and distribution.

Inventive Principle:

Principle #26Copying

Data Source

PatentEP4679874A1Communication device, control method, and program

Publication Date: 2026.01.14 CANON KK

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AI summary

An access point device that performs communication with a station device establishes a link for performing communication with a station, generates an encryption key for encrypting the communication with the station device, and shares information about the encryption key with another access point device.