Multi-AP Role Self-Election With Timed Configuration Search

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Solution Overview

Problem

Existing multi-AP networks require manual configuration of roles for APs, which is inefficient and reduces the networking efficiency.

Innovation Solution

APs in a multi-AP network autonomously determine their roles using an AP automatic configuration search message in the 1905 protocol, configuring as an agent if a response is received within a predetermined period, or as a controller if not, with additional checks for 1905 devices via WAN ports.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If manual configuration of AP roles is used, then role assignment can be controlled by user, but networking efficiency is low and operation complexity increases

Engineering Contradiction:
Improverole configuration operationVSAvoidnetworking efficiency
Core Design Contradiction:
Ease of operationVSProductivity

Solution Approach 1:

The patent implements self-service by enabling APs to autonomously determine their own roles (controller or agent) through automatic configuration search messages. Each AP broadcasts a search message and listens for responses from other APs, automatically electing a controller without requiring manual user configuration. This eliminates the need for users to manually assign roles while maintaining efficient networking operation.

Inventive Principle:
Principle #25Self-service

2Extent of automation

If automatic role configuration is implemented, then manual intervention is reduced, but configuration complexity increases

Engineering Contradiction:
Improverole configuration automationVSAvoidconfiguration process complexity
Core Design Contradiction:
Extent of automationVSDevice complexity

Solution Approach 1:

The patent employs periodic action through the use of timers in the automatic configuration process. When an AP broadcasts a configuration search message, it starts a timer and waits for responses within a predetermined period. If no response is received within the timer duration, the AP assumes the controller role. This periodic waiting mechanism simplifies the overall complexity by providing a clear, time-based decision framework rather than requiring complex negotiation protocols.

Inventive Principle:
Principle #19Periodic action

3Productivity

If APs wait for response messages within predetermined period, then role election is automated, but time consumption increases

Engineering Contradiction:
Improvenetwork setup speedVSAvoidrole configuration time
Core Design Contradiction:
ProductivityVSLoss of time

Solution Approach 1:

The patent applies partial action by implementing a timeout mechanism that allows APs to make role decisions based on incomplete information. Instead of waiting for definitive responses from all potential controllers, each AP sets a predetermined time window and makes a decision when the timer expires. This partial waiting approach significantly reduces configuration time while still achieving reliable role election, as the timeout mechanism ensures that an AP will assume controller role if no other AP claims the role within the specified period.

Inventive Principle:
Principle #16Partial or excessive action

Data Source

PatentEP3993484B1Method and device for automatic role assumption, and computer readable storage medium
Publication Date: 2025.08.13 ZTE CORP
  • EP3993484B1 patent drawingFigure 1~2
  • EP3993484B1 patent drawingFigure 3~4
  • EP3993484B1 patent drawingFigure 5~6

AI summary

Disclosed are a method, a device and a computer-readable storage medium for self-election of a role, for a multi-access point (AP) network. The method includes: an AP in the multi-AP network transmits an AP automatic configuration search message after being initiated (201); and the AP configures its own role as an agent in case that the AP receives a response message for the AP automatic configuration search message within a predetermined period (202).