Status Report Segmentation for Retransmission Latency

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Solution Overview

Problem

Existing communication systems face inefficiencies in retransmitting failed packets due to the prohibition on sending status reports during a processing period, leading to increased latency and potential duplicate retransmissions.

Innovation Solution

A method and system that allow for the transmission of subsequent status reports requesting retransmission of failed packets during a previous status report processing period, incorporating time information to prevent duplicate transmissions and reduce latency by enabling quick re-reception of failed packets.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a status report prohibition period is enforced after each status report is transmitted, then duplicate retransmissions are prevented, but latency increases and subsequent failed packets cannot be promptly retransmitted

Engineering Contradiction:

Improveprevention of duplicate retransmissionsVSAvoidlatency

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The status report prohibition period is segmented into two distinct periods: a first status report processing period (immediate retransmission window) and a second status report processing period (extended retransmission window). This segmentation allows the system to handle different types of status reports differently, enabling low-latency retransmission for certain cases while maintaining duplicate prevention through the prohibition period.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The system dynamically adjusts the status report prohibition period based on the specific conditions of each status report transmission. The prohibition period is not fixed but adapts based on packet reception status, allowing flexible control over when subsequent status reports are permitted, thus balancing duplicate prevention with latency reduction.

Inventive Principle:

Principle #15Dynamics

2Reliability

If the status report prohibition period is extended to prevent duplicate retransmissions, then reliability improves, but the ability to detect and retransmit subsequently detected failed packets deteriorates

Engineering Contradiction:

Improveaccuracy of retransmission controlVSAvoidpacket retransmission efficiency

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The processing period is divided into two stages: the first status report processing period for immediate retransmission handling, and the second status report processing period for subsequent failed packet detection. This segmentation enables the system to maintain accurate duplicate prevention while improving productivity by allowing efficient retransmission of subsequently detected failed packets during the second period.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The system performs preliminary actions by transmitting the first status report and initiating the first processing period before receiving subsequent packets. This preliminary action ensures that immediate retransmission is prepared for, while the second processing period is already in place to handle subsequently detected failed packets, thus maintaining both reliability and productivity.

Inventive Principle:

Principle #10Preliminary action

3Speed

If status reports are transmitted immediately upon detecting failed packets, then retransmission speed increases, but duplicate status reports may be sent during processing periods

Engineering Contradiction:

Improveretransmission speedVSAvoiduniqueness of status reports

Core Design Contradiction:

SpeedVSReliability

Solution Approach 1:

The prohibition period is segmented into two distinct processing periods with different purposes: the first for immediate retransmission speed optimization, and the second for preventing duplicate reports. This segmentation allows the system to transmit status reports immediately for speed while maintaining reliability through the structured prohibition periods that prevent duplicate transmissions.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The system uses feedback mechanisms through the status report processing periods to control when subsequent status reports are permitted. The feedback from the first processing period (immediate retransmission) and the second processing period (duplicate prevention) works together to optimize both speed and reliability, ensuring unique status reports are sent at optimal times.

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS11757574B2Communications signal retransmissions using status reports

Publication Date: 2023.09.12 SAMSUNG ELECTRONICS CO LTD

AI summary

A communications system, a method of operating a communications system, and a method of operating a communications device are provided. The communications system includes a transmitter configured to transmit a data packet to a receiver; and the receiver configured to receive the data packet from the transmitter, wherein the receiver is configured to receive at least one first packet from the transmitter, determine whether there is a first failed packet having an error from among the at least one first packet, transmit a first status report requesting retransmission of the first failed packet, and transmit a second status report requesting retransmission of the first failed packet within a previously determined status report processing period from transmission of the first status report, wherein the first status report comprises first time information corresponding to a transmission time of the first status report from the receiver to the transmitter, and the second status report comprises second time information corresponding to a transmission time of the second status report from the receiver to the transmitter.