Mixed Format MU-MIMO OFDMA Wireless Packet Structure

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Solution Overview

Problem

Existing wireless communication systems face challenges in efficiently managing channel resources to minimize traffic between access points and multiple user terminals, particularly in achieving high data throughput with limited communication resources.

Innovation Solution

The implementation of a method and apparatus that combines Multiple-User Multiple-Input Multiple-Output (MU-MIMO) and Orthogonal Frequency-Division Multiple Access (OFDMA) techniques in a wireless communication system, allowing for simultaneous transmission of MU-MIMO and OFDMA portions within a Physical Layer Data Unit (PPDU) packet, optimizing frequency bandwidth usage.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If traditional wireless communication protocols are used, then system simplicity is maintained, but data throughput and resource utilization efficiency deteriorate

Engineering Contradiction:

Improvedata throughputVSAvoidprotocol complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent combines MU-MIMO and OFDMA techniques into a unified mixed format protocol, allowing simultaneous use of both spatial multiplexing (MU-MIMO) and frequency division multiplexing (OFDMA) to achieve higher throughput while managing complexity through integrated packet structure definitions

Inventive Principle:

Principle #5Merging (Combining)

2Productivity

If channel resources are allocated to multiple user terminals, then data throughput increases, but the amount of traffic between access point and terminals increases

Engineering Contradiction:

Improvedata throughputVSAvoidtraffic volume

Core Design Contradiction:

ProductivityVSQuantity of substance

Solution Approach 1:

The patent introduces a new dimensional approach by combining spatial dimension (MU-MIMO) with frequency dimension (OFDMA) in a mixed format, enabling multiple users to share the channel simultaneously across different spatial streams and frequency sub-channels, thereby increasing throughput without linearly increasing overall traffic volume

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

3Productivity

If limited communication resources are used, then resource utilization efficiency must be maximized, but the ability to serve multiple users simultaneously is constrained

Engineering Contradiction:

Improveresource utilization efficiencyVSAvoidmulti-user support capability

Core Design Contradiction:

ProductivityVSAdaptability or versatility

Solution Approach 1:

The mixed format protocol serves multiple functions simultaneously: it supports both MU-MIMO and OFDMA modes, accommodates multiple user terminals with different channel conditions, and provides flexible resource allocation mechanisms that adapt to varying traffic demands, thereby achieving high resource utilization while maintaining strong multi-user support capability

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentEP3063897B1Methods and apparatus for wireless communication using a mixed format

Publication Date: 2020.04.22 QUALCOMM INC

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AI summary

Methods and apparatus for multiple user communication are provided. In one aspect, method for wireless communication includes generating a packet comprising a multiple-user multiple-input multiple-output (MU-MIMO) portion and an orthogonal frequency division multiple access (OFDMA) portion. The method further includes transmitting the packet over a packet transmission frequency bandwidth.