TDD Full-Duplex PDSCH Configuration for Interference Control

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

The allocation of limited time duration for uplink in TDD carriers leads to reduced coverage, increased latency, and reduced capacity, while full duplex operation in TDD carriers faces interference issues at base stations and user equipment.

Innovation Solution

Implementing techniques for managing cross-link interference by segregating antenna elements between uplink and downlink, using intelligent beam scheduling, and digital interference cancellation algorithms to support full duplex communication in TDD bands.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If full duplex operation is implemented in TDD carriers, then capacity and spectral efficiency are improved, but interference issues occur at base stations and user equipment

Engineering Contradiction:

ImprovecapacityVSAvoidinterference

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The patent segments the TDD carrier into multiple subbands, allowing different portions of the spectrum to be allocated to different duplex modes. This enables simultaneous full duplex operation in some subbands while maintaining half duplex in others, thereby improving overall capacity while controlling interference through spatial and frequency separation

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent applies different duplex operation modes to different local regions (subbands) of the frequency spectrum based on interference conditions and traffic requirements. Each subband can be independently configured to operate in full duplex or half duplex mode, optimizing performance locally while managing overall system interference

Inventive Principle:

Principle #3Local quality

2Productivity

If limited time duration is allocated for uplink in TDD carriers, then downlink capacity is improved, but coverage and uplink capacity are reduced

Engineering Contradiction:

Improvedownlink capacityVSAvoidcoverage

Core Design Contradiction:

ProductivityVSVolume of moving object

Solution Approach 1:

The patent enables continuous full duplex operation where downlink and uplink transmissions occur simultaneously in different subbands, eliminating the time-sharing limitation of traditional TDD. This continuous operation improves both downlink capacity and uplink coverage by allowing uplink transmissions to occur without being constrained by periodic time slots

Inventive Principle:

Principle #20Continuity of useful action

Data Source

PatentUS20250330849A1Communication method, access network node, user equipment

Publication Date: 2025.10.23 NEC CORP

AI summary

A user equipment (UE) is disclosed that receives configuration information for a resource for a downlink reference signal and measures the downlink reference signal based on the configuration information. The UE reports information to the access network node, based on the configuration information and the measurement. The reported information includes information for configuring a first transmitter parameter configuration for at least one physical downlink shared channel (PDSCH) transmitted in at least one time resource configured for downlink communication, and information for configuring a second transmitter parameter configuration for at least one PDSCH transmitted in at least one time resource configured for full duplex communication.