Base Station Uplink Timing Control for SBFD Symbol Alignment

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Solution Overview

Problem

Existing radio communication systems face challenges in effectively controlling transmission timing, particularly in subband non-overlapping full duplex (SBFD) scenarios, leading to increased self-interference due to misaligned symbol timings between uplink and downlink subbands.

Innovation Solution

A base station and terminal configuration that individually sets first and second transmission timings in different time resources, using control circuitry to manage these timings and reception circuitry to receive signals based on these configurations, with methods to align symbol boundaries and reduce self-interference through dynamic and semi-static signaling.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If a single transmission timing is used for uplink in all time resources, then the system complexity is reduced, but self-interference increases due to misaligned symbol timings between uplink and downlink subbands in SBFD scenarios

Engineering Contradiction:

Improvetransmission timing control complexityVSAvoidself-interference

Core Design Contradiction:

Device complexityVSObject-generated harmful factors

Solution Approach 1:

The patent segments the transmission timing control into multiple independent timing parameters (first transmission timing for first time resources, second transmission timing for second time resources). This segmentation allows different timing configurations to be applied to different time resources, enabling precise alignment of symbol timings between uplink and downlink subbands in SBFD scenarios while maintaining manageable system complexity through structured control.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent applies local quality by configuring transmission timings locally for different time resources rather than using a uniform timing across all resources. The first transmission timing is specifically applied to first time resources while the second transmission timing is applied to second time resources, allowing optimal timing alignment for SBFD operations in specific resource contexts without affecting other resources.

Inventive Principle:

Principle #3Local quality

2Reliability

If transmission timing is individually configured for different time resources, then symbol timing alignment is improved and self-interference is reduced, but the control signaling overhead increases

Engineering Contradiction:

Improvesymbol timing alignmentVSAvoidcontrol signaling overhead

Core Design Contradiction:

ReliabilityVSLoss of information

Solution Approach 1:

The patent implements dynamic timing control where the first transmission timing and second transmission timing can be individually configured and adjusted based on the specific requirements of different time resources. This dynamic approach enables the system to adapt timing configurations to match SBFD operational requirements, achieving reliable symbol timing alignment while the structured control mechanism manages signaling overhead through efficient parameter configuration.

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS20260075550A1Base station, terminal, and communication method

Publication Date: 2026.03.12 PANASONIC INTELLECTUAL PROPERTY CORP OF AMERICA

AI summary

This base station comprises a control circuit that individually sets a first transmission timing for uplink in a first time resource and a second transmission timing for uplink in a second time resource different from the first time resource, and a reception circuit that receives a signal on the basis of the first transmission timing.