Base Station Non-Orthogonal Multiplexing Control

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Solution Overview

Problem

Current technologies lack effective methods for controlling non-orthogonal multiplexing processing in wireless local area networks (WLANs), which is essential for improving spectrum efficiency in next-generation standards like IEEE 802.11be.

Innovation Solution

A base station and terminal configuration that includes control circuitry to generate information on a terminal group for non-orthogonal multiplexing and transmission circuitry to transmit this information during control information periods, enabling appropriate control of non-orthogonal multiplexing processing.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If non-orthogonal multiplexing is implemented to improve spectrum efficiency, then spectrum efficiency is improved, but control complexity increases due to lack of effective control methods

Engineering Contradiction:

Improvespectrum efficiencyVSAvoidcontrol complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The control information is segmented into two parts: a first part transmitted in a downlink control information field containing resource allocation for multiple terminals, and a second part transmitted in a physical downlink shared channel containing demodulation reference signal information. This segmentation allows complex non-orthogonal multiplexing control to be broken down into manageable components, reducing overall control complexity while maintaining spectrum efficiency improvements

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The base station performs preliminary control by transmitting the first part of control information in the downlink control information field before data transmission. This preliminary action provides terminal groups with advance knowledge of resource allocation and demodulation parameters, enabling them to properly receive and process non-orthogonally multiplexed signals without requiring complex real-time control mechanisms

Inventive Principle:

Principle #10Preliminary action

2Ease of operation

If control information is transmitted during control information periods, then non-orthogonal multiplexing control is enabled, but information transmission timing constraints increase

Engineering Contradiction:

Improvecontrol capabilityVSAvoidtiming constraints

Core Design Contradiction:

Ease of operationVSLoss of time

Solution Approach 1:

The patent merges the transmission of control information for non-orthogonal multiplexing with existing control information periods and structures. The first part of control information is combined with downlink control information, and the second part is combined with physical downlink shared channel transmissions. This merging approach enables control capability without requiring separate dedicated transmission periods, thereby avoiding additional timing constraints

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentUS12225518B2Base station, terminal, and communication method

Publication Date: 2025.02.11 PANASONIC INTELLECTUAL PROPERTY CORP OF AMERICA

AI summary

This base station is provided with: a control circuit that generates information relating to a terminal group among a plurality of terminals, said terminal group being a target of transmission by non-orthogonal multiple access; and a transmission circuit that transmits the information relating to the terminal group during a period in which control information addressed to the plurality of terminals is transmitted.