Multicast Communication Apparatus with Adaptive Repair Transmission

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Solution Overview

Problem

In wireless communication, proximity of multiple communication apparatuses leads to signal interference, and existing multicast communication methods lack efficient data retransmission mechanisms, resulting in data loss and increased latency.

Innovation Solution

A communication apparatus that manages data transmission and reception through multicast groups, using a publisher-subscriber model with a retransmission process for missing data chunks, and employs transmission power and speed control for repair messages to minimize interference and ensure data integrity.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If multiple communication apparatuses perform wireless communication in proximity, then communication can be established without infrastructure, but signal interference occurs

Engineering Contradiction:

Improvecommunication availabilityVSAvoidsignal interference

Core Design Contradiction:

Adaptability or versatilityVSObject-affected harmful factors

Solution Approach 1:

The patent implements periodic transmission of repair messages at predetermined intervals to retransmit missing data chunks. This periodic action ensures data integrity while the timing-controlled transmission reduces interference by avoiding continuous signaling, thus resolving the contradiction between communication reliability and signal interference in proximity-based wireless communication.

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

The system employs feedback mechanisms where receiving apparatuses notify transmitting apparatuses about successfully received data chunks, enabling the transmitter to identify and retransmit only the missing chunks. This targeted feedback approach maintains data integrity without requiring continuous transmission, thereby reducing signal interference while ensuring reliable communication.

Inventive Principle:

Principle #23Feedback

2Reliability

If repair messages are transmitted frequently to ensure data integrity, then data loss is prevented, but interference increases and power consumption rises

Engineering Contradiction:

Improvedata integrityVSAvoidinterference

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent transmits repair messages selectively only when data chunk reception is confirmed incomplete, rather than continuously. This partial action approach maintains data integrity by retransmitting only necessary chunks while avoiding unnecessary transmissions that would increase interference and power consumption, thus resolving the contradiction between reliability and harmful factors.

Inventive Principle:

Principle #16Partial or excessive action

Solution Approach 2:

The system dynamically adjusts transmission parameters including timing intervals and power levels for repair messages based on reception status. By changing these parameters adaptively, the system ensures data integrity through targeted retransmission while minimizing interference and power consumption by avoiding excessive or continuously high-power transmissions.

Inventive Principle:

Principle #35Parameter changes

3Reliability

If transmission power is increased to ensure message delivery, then data reception reliability improves, but power consumption increases

Engineering Contradiction:

Improvemessage delivery reliabilityVSAvoidpower consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The patent applies transmission power control where high power is used only when necessary for repair message retransmission, rather than maintaining high power continuously. This partial application of high power ensures reliable message delivery for critical retransmission events while minimizing overall power consumption during normal operation or when delivery is already successful.

Inventive Principle:

Principle #16Partial or excessive action

Solution Approach 2:

The system dynamically adjusts transmission power levels based on reception feedback and delivery status. Power is increased adaptively only when needed to ensure successful repair message delivery, and reduced when delivery is confirmed or not required, thus resolving the contradiction between delivery reliability and power consumption through dynamic parameter adjustment.

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS9282522B2Communication apparatus and communication method

Publication Date: 2016.03.08 KIOXIA CORP

AI summary

According to the embodiments, when a communication apparatus is a publisher, a transmission message including a first identifier is transmitted using first transmission power, when the communication apparatus is a subscriber, data of a reception message including the first identifier is stored in a nonvolatile memory, when at least a part of the reception message cannot be received, a repair message for requesting retransmission of the reception message is transmitted from a wireless interface unit using second transmission power, and when there is no response, a repair message is transmitted using third transmission power that is larger than the second transmission power.