Multi-User Cascading Wireless Terminal UL MU Transmission

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Solution Overview

Problem

Existing wireless communication technologies face challenges in efficiently supporting multi-user cascading transmission, particularly in high-density environments where bandwidth utilization and communication efficiency are critical.

Innovation Solution

A wireless communication terminal equipped with a transceiver and processor, capable of receiving Downlink Multi-User (DL MU) PPDU information for Uplink Multi-User (UL MU) transmission and transmitting UL MU PPDU based on this information, while optimizing parameters such as frequency bandwidth, coding schemes, and carrier sensing.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If multi-user cascading transmission is implemented in high-density environments, then bandwidth utilization and communication efficiency are improved, but system complexity and difficulty of coordination increase

Engineering Contradiction:

Improvecommunication efficiencyVSAvoidsystem complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent segments the multi-user transmission process into distinct downlink and uplink phases with clear boundary definitions. The base terminal transmits DL MU PPDU to multiple wireless terminals, which then independently transmit UL MU PPDU based on received information, dividing the complex multi-user coordination into manageable sequential steps

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The base terminal performs preliminary actions by transmitting DL MU PPDU containing all necessary information (bandwidth, coding scheme, carrier sensing parameters) before the uplink transmission. This preliminary information provision enables wireless terminals to prepare and execute UL MU PPDU transmission without real-time coordination complexity

Inventive Principle:

Principle #10Preliminary action

2Productivity

If DL MU PPDU information is transmitted to multiple wireless terminals for UL MU transmission, then bandwidth utilization is enhanced, but transmission coordination difficulty increases

Engineering Contradiction:

Improvebandwidth utilizationVSAvoidcoordination difficulty

Core Design Contradiction:

ProductivityVSDifficulty of detecting and measuring

Solution Approach 1:

The DL MU PPDU structure is designed with universal fields that serve multiple functions simultaneously: the bandwidth field defines both downlink and uplink bandwidth, the coding scheme field applies to both transmission directions, and the carrier sensing information serves both coordination and execution purposes. This multi-functionality reduces the need for separate coordination messages

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The system implements feedback mechanisms where wireless terminals receive DL MU PPDU information from the base terminal and respond by transmitting UL MU PPDU. The base terminal can adjust subsequent DL MU transmissions based on received uplink feedback, creating a closed-loop coordination system that reduces long-term coordination difficulty

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS20250038890A1Wireless communication method supporting multi-user cascading transmission and wireless communication terminal using same

Publication Date: 2025.01.30 WILUS INSTITUTE OF STANDARDS & TECHNOLOGY INC

AI summary

Provided is a wireless communication terminal that communicates wirelessly. The terminal includes: a transceiver; and a processor. The processor is configured to receive a Downlink Multi-User (DL MU) PPDU including information for an Uplink Multi-User (UL MU) transmission from a base wireless communication terminal by using the transceiver, and transmit the UL MU PPDU to the base wireless communication terminal based on the information for UL MU transmission.