Virtual Access Point Workload Distribution for WLAN Efficiency

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Wireless multi-client networking faces inefficiencies due to high collision probabilities and reduced data rates in IEEE 802.11 networks, particularly when handling a large number of clients, as existing methods like CSMA/CA struggle to manage traffic effectively without point coordination function (PCF) support.

Innovation Solution

The method involves creating multiple virtual access points (VAPs) to distribute workload and dynamically allocate Quality of Service (QoS) parameters such as time slots, arbitration inter-frame spacing, and contention windows to optimize traffic management and reduce collisions, employing Time Division Duplexing (TDD) without relying on PCF.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If multiple virtual access points (VAPs) are created to distribute workload, then network efficiency and collision reduction are improved, but device complexity increases

Engineering Contradiction:

Improvenetwork efficiencyVSAvoiddevice complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent applies segmentation by dividing a single access point into multiple virtual access points (VAPs), where each VAP serves as an independent logical entity for handling client connections. This segmentation distributes the workload across multiple VAPs, reducing collision probabilities and improving network efficiency while maintaining a unified physical infrastructure.

Inventive Principle:

Principle #1Segmentation

2Adaptability or versatility

If Time Division Duplexing (TDD) is implemented without Point Coordination Function (PCF), then compatibility with non-PCF clients is improved, but collision avoidance capability deteriorates

Engineering Contradiction:

Improveclient compatibilityVSAvoidcollision avoidance

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent changes the medium access control parameter from PCF-based coordination to TDD-based time slot allocation. By implementing uplink accumulation time and structured time slots for multiple VAPs, the system achieves collision avoidance without requiring PCF support, thus maintaining compatibility with standard IEEE 802.11 clients while improving reliability through deterministic access patterns.

Inventive Principle:

Principle #35Parameter changes

3Productivity

If uplink accumulation time is increased to improve data rate, then transmission efficiency is improved, but transmission delay increases

Engineering Contradiction:

Improvedata rateVSAvoidtransmission delay

Core Design Contradiction:

ProductivityVSLoss of time

Solution Approach 1:

The patent implements dynamic uplink accumulation time adjustment where the accumulation time is adapted based on the number of clients, traffic conditions, and VAP load. This dynamic parameter adjustment allows the system to optimize data rate by increasing accumulation time when beneficial while reducing delays when clients require faster response, thus balancing productivity and time loss adaptively.

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS10009280B2Method and apparatus for providing an efficient multi-client access

Publication Date: 2018.06.26 HUAWEI TECH CO LTD

AI summary

An apparatus and a method for providing an efficient multi-client access in a WLAN, the method comprising the step of: when the number of clients exceeds a threshold, creating at least two virtual access points (VAP1, VAP2, VAP3); load balancing by distributing workloads across the created at least two virtual access points; and dynamically allocating at least one quality of service parameter (e.g., timeslots, AIFS, TXOP, maximum and minimum contention window) to each of the created at least two virtual access points.