MU-MIMO Beacon Load Balancing for WLAN Traffic Distribution
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Solution Overview
Problem
Current communication systems, such as WLAN, face challenges in uniformly distributing traffic among access points (APs) due to arbitrary connections from stations (STAs), leading to concentrated traffic on specific APs, which limits high-speed and stable transmission of large-capacity data.
Innovation Solution
An apparatus and method that use a MU-MIMO scheme to assign group IDs to terminal groups, define a load element indicating the resource and load state of a basic service set (BSS), and transmit a beacon frame to STAs, allowing them to connect to the most suitable AP for balanced traffic distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If STAs arbitrarily select one AP to connect, then connection simplicity is improved, but traffic distribution uniformity deteriorates
Solution Approach 1:
The patent implements a feedback mechanism where APs transmit beacon frames containing load information about their current state to neighboring APs. This feedback loop enables STAs to receive and process load information, allowing them to make more informed connection decisions that balance simplicity with uniform traffic distribution across multiple APs.
2Ease of operation
If STAs connect to a particular AP, then connection ease is improved, but data transmission capability deteriorates
Solution Approach 1:
The patent applies preliminary action by having APs proactively transmit beacon frames containing load information before STAs make connection decisions. This advance provision of load state information enables STAs to pre-evaluate AP options and select optimal connections, ensuring both ease of connection and high data transmission capability without requiring complex real-time decisions.
3Ease of operation
If traffic is concentrated on a particular AP, then connection simplicity is improved, but stable data transmission deteriorates
Solution Approach 1:
The beacon frame transmission mechanism creates a feedback loop where load information is continuously exchanged between APs. This feedback enables dynamic load balancing and prevents traffic concentration on single APs, thereby maintaining stable data transmission while preserving connection simplicity through automated load-aware selection.
Data Source
AI summary
An apparatus for transmitting data in a communication system includes: a receiver configured to receive signals from a plurality of terminals in a multiuser-multi-input multi-output (MU-MIMO) scheme; an assignor configured to assign group IDs to terminal groups, respectively after identifying the plurality of terminals and grouping the plurality of terminals into the terminal groups; a generator configured to define a load element which indicates a resource and load state of a basic service set (BSS) through the group IDs and to generate a beacon frame including the load element; and a transmitter configured to transmit the beacon frame to the plurality of terminals in the MU-MIMO scheme.