Uplink Gap Configuration for Full-Duplex Self-Interference Calibration

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Solution Overview

Problem

Current wireless communication systems face challenges in efficiently performing self-interference measurements and beam pair calibration for full-duplex communication, as ongoing uplink data communications complicate these processes, leading to reduced efficiency and increased self-interference.

Innovation Solution

The implementation of an uplink gap in wireless communication systems, where configuration information is used to schedule a period without uplink data transmissions, allowing user equipment (UE) to perform self-interference measurements and beam pair calibration using reference signals, thereby improving beam efficiency and reducing self-interference.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If ongoing uplink data communications are performed, then communication productivity is maintained, but self-interference measurements and beam pair calibration efficiency deteriorate

Engineering Contradiction:

Improvecommunication productivityVSAvoidself-interference measurement efficiency

Core Design Contradiction:

ProductivityVSMeasurement precision

Solution Approach 1:

The uplink transmission time is segmented into data transmission periods and dedicated calibration periods. During the calibration period, only calibration signals are transmitted while data transmission is suspended, enabling accurate self-interference measurements without contamination from data communications.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Beam pair calibration is performed in advance during dedicated calibration periods before actual data communication begins. This preliminary calibration ensures that beamforming parameters are optimized before data transmission starts, maintaining communication productivity while achieving accurate calibration.

Inventive Principle:

Principle #10Preliminary action

2Productivity

If ongoing uplink data communications are performed, then communication productivity is maintained, but self-interference increases

Engineering Contradiction:

Improvecommunication productivityVSAvoidself-interference

Core Design Contradiction:

ProductivityVSObject-generated harmful factors

Solution Approach 1:

The calibration process is extracted from the ongoing data communication process and performed during separate dedicated periods. This extraction eliminates the interference between data transmissions and calibration signals, allowing accurate measurement and calibration without the harmful self-interference that would occur during continuous data communication.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

Calibration is performed periodically during designated time intervals rather than continuously during data transmission. This periodic calibration approach maintains communication productivity during data periods while periodically updating beamforming parameters to compensate for changing channel conditions and self-interference characteristics.

Inventive Principle:

Principle #19Periodic action

Data Source

PatentUS20240373273A1Uplink gap configuration

Publication Date: 2024.11.07 QUALCOMM INC

AI summary

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive configuration information indicating an uplink gap. The UE may transmit a reference signal in the uplink gap. The UE may perform at least one of a self-interference measurement or a beam pair calibration for full-duplex communication based at least in part on the reference signal. Numerous other aspects are described.