Communication Control Apparatus for Data Loss Recovery

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Solution Overview

Problem

Data loss during communication paths, particularly when data is transferred from one reception device to another, is not adequately recovered, leading to insufficient recovery rates in grandchild nodes using existing retransmission methods like ARQ and ALM.

Innovation Solution

A communication control apparatus that includes a first obtaining section to determine the permitted reproduction period of the second communication device, a second obtaining section to determine the recovery period for the third communication device, and a control section to manage loss recovery processing, ensuring data is recovered within a calculated time difference between these periods.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If retransmission request messages are transmitted from the reception device to the transmission device to recover lost data, then data loss recovery is improved for direct communication, but data loss recovery fails when the reception device transfers data to another device (third communication device)

Engineering Contradiction:

Improvedata loss recoveryVSAvoiddata transfer capability

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The communication control apparatus obtains in advance the permitted reproduction period of the second communication device and the recovery period of the third communication device before data loss occurs. By calculating the time difference between these periods and using it to control retransmission timing, the system ensures that data is recovered early enough to be available when needed by the third device, thus resolving the contradiction between reliability and adaptability.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system establishes a feedback loop where the communication control apparatus continuously monitors the permitted reproduction period and recovery period parameters, calculates the time difference, and adjusts retransmission control accordingly. This feedback mechanism enables the system to adapt to different communication scenarios while maintaining reliable data recovery.

Inventive Principle:

Principle #23Feedback

2Manufacturing precision

If the second communication device waits for data recovery before reproducing data, then data reproduction quality is improved, but the permitted reproduction period is extended causing delays

Engineering Contradiction:

Improvedata reproduction qualityVSAvoidpermitted reproduction period

Core Design Contradiction:

Manufacturing precisionVSLoss of time

Solution Approach 1:

The communication control apparatus calculates the time difference between the permitted reproduction period and recovery period in advance, and uses this pre-calculated value to control the retransmission timing. This preliminary action allows the second communication device to reproduce data at the optimal moment without excessive waiting, thus improving reproduction quality while minimizing time loss.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system dynamically adjusts the retransmission control parameters based on the calculated time difference between the permitted reproduction period and recovery period. By changing the timing parameters adaptively, the system optimizes both data reproduction quality and time efficiency.

Inventive Principle:

Principle #35Parameter changes

3Reliability

If the third communication device waits for data recovery to ensure quality, then data recovery rate is improved, but the recovery period is extended affecting real-time performance

Engineering Contradiction:

Improvedata recovery rateVSAvoidrecovery period

Core Design Contradiction:

ReliabilityVSDuration of action of moving object

Solution Approach 1:

The communication control apparatus obtains the recovery period parameter of the third communication device in advance and uses it to calculate the time difference for retransmission control. This preliminary action ensures that data is recovered within the necessary time frame, improving recovery rate while preventing excessive extension of the recovery period that would affect real-time performance.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS9306824B2Communication control apparatus, communication control method, and computer-readable non-transitory recording medium

Publication Date: 2016.04.05 PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD

AI summary

A communication control apparatus that controls, in a second communication device, data communication from a first communication device to the second communication device, the second communication device transferring data received from the first communication device to a third communication device, the communication control apparatus including a first obtaining section that obtains a permitted reproduction period of the second communication device, this period being a period during which reproduction of data identical to lost data is permitted, a second obtaining section that obtains a first recovery period used for recovery of the lost data in the third communication device, and a control section that controls loss recovery processing in the second communication device, the lost data being recovered by the second communication device within a time difference that is a period obtained by subtracting the first recovery period from the permitted reproduction period.