Two-Stage Burst Detection for Dummy-Burst Reduction

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Solution Overview

Problem

Existing communications systems face inefficiencies due to the transmission of dummy bursts by user terminals, which waste power and interfere with other transmissions, particularly in satellite communications networks with variable return link transponder gain and high latency.

Innovation Solution

A two-stage burst detection system is employed, where a first burst detector analyzes the physical structure of the signal to generate a first burst indicator, and a second burst detector analyzes the informational structure to generate a second burst indicator, allowing for the discrimination between actual and dummy bursts, thereby optimizing transmission and reducing unnecessary processing.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If user terminals transmit dummy bursts to maintain scheduled transmissions, then transmission schedule reliability is improved, but power consumption increases and network resources are wasted

Engineering Contradiction:

Improvetransmission schedule reliabilityVSAvoidpower consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The system performs preliminary burst detection before full decoding to identify dummy bursts. The first burst detector analyzes physical structure indicators (signal power, duration, characteristics) to predict whether a scheduled burst contains actual data or is a dummy transmission, allowing the system to prepare appropriate processing levels in advance.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system applies partial processing by implementing a two-stage detection approach: first stage analyzes physical structure indicators for quick burst identification, and only performs full decoding when necessary. This partial action on burst detection reduces overall processing load while maintaining reliability.

Inventive Principle:

Principle #16Partial or excessive action

2Reliability

If user terminals transmit dummy bursts, then transmission schedule reliability is maintained, but interference with other transmissions increases

Engineering Contradiction:

Improvetransmission schedule reliabilityVSAvoidinterference

Core Design Contradiction:

ReliabilityVSObject-generated harmful factors

Solution Approach 1:

The system extracts and identifies dummy bursts from the transmission stream using physical structure analysis. By separating dummy bursts from actual data transmissions through the first burst detector, the system can remove or suppress these harmful signals before they cause interference to other users.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The system converts the presence of dummy bursts, which are originally harmful interference, into useful information for detecting actual data transmissions. The physical structure indicators of dummy bursts (signal power, duration, characteristics) serve as detection markers that help identify when real data is present versus when dummy transmissions occur.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

3Measurement precision

If full decoding is performed on all received signals, then decoding accuracy is improved, but computational resources are wasted on dummy bursts

Engineering Contradiction:

Improvedecoding accuracyVSAvoidcomputational resources

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The decoding process is segmented into two distinct stages: first burst detection using physical structure indicators, and second decoding only for signals identified as containing actual data. This segmentation prevents computational resources from being wasted on dummy bursts while maintaining accuracy for real transmissions.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Inventive Principle:

Principle #16Partial or excessive action

4Measurement precision

If burst detection sensitivity is increased to detect all possible bursts, then detection accuracy is improved, but false alarm rate increases

Engineering Contradiction:

Improveburst detection accuracyVSAvoidfalse alarm rate

Core Design Contradiction:

Measurement precisionVSReliability

Solution Approach 1:

The system applies different detection criteria and thresholds for different signal characteristics. The first burst detector uses physical structure indicators (signal power, duration, characteristics) with optimized thresholds tailored to the specific communication system, while the second detector uses decoding results with appropriate validation criteria, creating locally optimized detection quality for each stage.

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS20250293849A1Multi-stage burst detection for communications systems

Publication Date: 2025.09.18 VIASAT INC

AI summary

Systems and methods are described that enable user terminals to eliminate or reduce the number of dummy bursts (or bursts with no data) they send. The systems and methods use two burst detectors, a first burst detector that analyzes the physical structure of the signal, and a second burst detector that analyzes the informational structure of the signal. Output from the first burst detector can be used to control operation of a signal decoder that decodes received signals. The second burst detector analyzes output from the signal decoder to determine the second burst indicator. In other words, the first burst detector can be implemented prior to decoding the received signal to provide a first estimate related to the presence or absence of a burst. This can then be used to limit the amount of processing performed by the signal decoder.