Wireless Communication Path Establishment via Broadcast-Unicast Transition

Solution Overview

Problem

Conventional wireless communication systems face challenges in establishing communication paths efficiently, leading to prolonged setup times and increased data collisions, which degrade communication quality and increase power consumption.

Innovation Solution

The system employs a method where data is initially sent in broadcast by the source node and relay nodes until a destination node is determined, then switched to unicast, reducing the number of acknowledgments and collisions, and allowing for quicker path establishment.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If data is sent in broadcast to establish communication path, then destination node can be determined, but data collision increases and communication quality degrades

Engineering Contradiction:

Improvecommunication qualityVSAvoiddata collision

Core Design Contradiction:

ReliabilityVSObject-generated harmful factors

Solution Approach 1:

The communication process is segmented into two distinct phases: broadcast phase for path establishment and unicast phase for data transmission. This segmentation allows the system to use broadcast only when necessary (for destination determination) and switch to unicast for actual data transfer, thereby reducing collisions while maintaining path establishment capability

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The transmission mode is made dynamic, transitioning from broadcast to unicast based on whether the destination node has been determined. This dynamic adaptation allows the system to optimize between path discovery (requiring broadcast) and data transmission (benefiting from unicast), reducing overall collisions and improving communication quality

Inventive Principle:

Principle #15Dynamics

2Adaptability or versatility

If broadcast is used for path establishment, then all nodes can receive data, but setup time increases

Engineering Contradiction:

Improvepath establishment capabilityVSAvoidsetup time

Core Design Contradiction:

Adaptability or versatilityVSLoss of time

Solution Approach 1:

The communication process is segmented into two distinct phases: broadcast phase for path establishment and unicast phase for data transmission. This segmentation allows the system to use broadcast only when necessary (for destination determination) and switch to unicast for actual data transfer, thereby reducing collisions while maintaining path establishment capability

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The system performs preliminary action by establishing the communication path and determining the destination node using broadcast before actual data transmission begins. Once the path is established, subsequent transmissions use unicast, avoiding repeated broadcast overhead and reducing overall setup time for data transfer

Inventive Principle:

Principle #10Preliminary action

3Productivity

If unicast is used immediately, then data transmission is efficient, but destination node cannot be determined

Engineering Contradiction:

Improvedata transmission efficiencyVSAvoiddestination information

Core Design Contradiction:

ProductivityVSLoss of information

Solution Approach 1:

The system performs preliminary action by establishing the communication path and determining the destination node using broadcast before actual data transmission begins. Once the path is established, subsequent transmissions use unicast, avoiding repeated broadcast overhead and reducing overall setup time for data transfer

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS10251202B2Wireless communication system

Publication Date: 2019.04.02 PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD

AI summary

A wireless communication system includes a first node as a source node having a wireless communication function, a second node as a destination node having a wireless communication function, and one or more third nodes configured to relay wireless communication between the first node and the second node. While a communication path through which data is sent from the first node to the second node is not established, the first node and the one or more third nodes send data in broadcast. After determining a destination in at least a part of the communication path from the first node to the second node, a node out of the first node and the one or more third nodes which has the determined destination sends data to the determined destination in unicast.