Communication Link Data Exchange with Adaptive Periods to Reduce Crosstalk

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Solution Overview

Problem

Crosstalk occurs in communication links due to electromagnetic interference between closely spaced wires, leading to incorrect data transfer.

Innovation Solution

A transmitter determines the transition pattern of bit values and sends them during a single or multiple transmission periods to avoid adjacent wires transitioning in opposite directions, using flag wires to indicate the number of periods if necessary.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If signals are transmitted on closely spaced wires to achieve high data throughput, then productivity is improved, but crosstalk errors increase due to electromagnetic interference

Engineering Contradiction:

Improvedata throughputVSAvoiddata transfer accuracy

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The transmitter determines the transition pattern of bit values before transmission and proactively decides whether to use single-period or multi-period transmission to prevent crosstalk errors before they occur. This preliminary analysis and decision-making ensures reliable data transfer while maintaining high throughput.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system dynamically adjusts the transmission strategy based on the transition pattern of bit values. When adjacent wires have opposite transitions (high risk of crosstalk), the system switches to multi-period transmission; otherwise, it uses single-period transmission. This dynamic adaptation optimizes both reliability and productivity.

Inventive Principle:

Principle #15Dynamics

2Reliability

If bit values are transmitted during multiple transmission periods to avoid crosstalk, then reliability is improved, but loss of time increases due to extended transmission duration

Engineering Contradiction:

Improvedata transfer accuracyVSAvoidtransmission time

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The system applies multi-period transmission selectively and partially - only when the transition pattern indicates adjacent wires have opposite transitions. For most other cases, single-period transmission is used. This partial application of the safer transmission method minimizes time loss while maintaining reliability when needed.

Inventive Principle:

Principle #16Partial or excessive action

Solution Approach 2:

The transmitter changes the transmission parameter (number of periods) based on the transition pattern of bit values. By analyzing whether adjacent wires have opposite transitions, the system adjusts the transmission duration parameter dynamically, using multiple periods only when necessary to prevent crosstalk, thereby minimizing time loss.

Inventive Principle:

Principle #35Parameter changes

3Reliability

If transition patterns are analyzed and transmission periods are adjusted to prevent crosstalk, then reliability is improved, but device complexity increases due to additional control logic

Engineering Contradiction:

Improvedata transfer accuracyVSAvoidtransmitter control complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The transmitter performs self-service by autonomously determining the transition pattern of bit values and selecting the appropriate transmission period strategy without requiring external intervention or complex external control systems. This self-service capability improves reliability while keeping the overall device complexity manageable.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The system uses feedback from the transition pattern analysis to adjust the transmission strategy. By continuously monitoring the transition patterns of bit values and using this feedback to determine whether single-period or multi-period transmission is appropriate, the system achieves high reliability through a relatively simple control mechanism that adapts based on real-time conditions.

Inventive Principle:

Principle #23Feedback

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

This approach reduces cross-talk errors by ensuring adjacent wires do not transition oppositely, maintaining data integrity and throughput.

Implementation Method 1

Crosstalk occurs when signals on one wire unintentionally affect signals on adjacent wires. For example, when a signal transitions from low to high or high to low, it generates an electromagnetic field that can induce a voltage in nearby wires

Methodology Applied

Scientific EffectElectromagnetic interference: Electromagnetic Induction

Data Source

PatentUS20250226854A1Systems and methods of exchanging data using a communication link

Publication Date: 2025.07.10 QUALCOMM INC

AI summary

A device includes a transmitter configured to obtain a particular set of bit values to be sent via a set of wires of a communication link. The transmitter is also configured to determine, based on a transition pattern associated with the particular set of bit values, whether to send the particular set of bit values during a single transmission period or during multiple transmission periods. The transmitter is further configured to send the particular set of bit values based on the determination.