Automatic Identifier Assignment in Daisy-Chained Multi-Screen Networks
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Solution Overview
Problem
In multi-screen display systems connected by daisy chaining over a network, existing methods struggle to automatically set identifiers for each device based on the connection sequence, as the communication protocol differs from RS232C, making it difficult to replicate the identifier setting process used in RS232C connections.
Innovation Solution
A system comprising a cumulative transmission and reception initiation control unit, a distance determination command transmission unit, a distance recognition unit, and an identifier control unit that sets identifiers for each device based on network distances recognized through response signals after data accumulation, allowing for automatic identifier setting in a network environment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If display devices are connected by daisy chaining over a network, then high-speed and multifunctional communication is achieved, but automatic identifier setting based on connection sequence becomes difficult
Solution Approach 1:
The system performs preliminary actions by accumulating data for a predetermined time period before determining network distance. This accumulation phase allows the master display device to collect response signals from all slave devices in the daisy chain, enabling subsequent automatic identifier assignment based on the accumulated connection sequence information.
Solution Approach 2:
The system implements feedback by transmitting distance determination commands to slave devices and receiving response signals back. The master device uses these feedback responses to calculate network distances and automatically assign identifiers, creating a closed-loop system that adapts to the actual connection sequence.
2Adaptability or versatility
If network protocol is used for daisy chaining, then communication functionality is enhanced, but RS232C communication procedure is not executed
Solution Approach 1:
The system achieves universality by making the identifier setting method applicable to both RS232C and network protocols. The master display device transmits distance determination commands and receives responses regardless of the underlying communication protocol, allowing the same automatic identifier assignment procedure to work across different communication standards.
Solution Approach 2:
The system substitutes the mechanical RS232C communication procedure with a network-based equivalent. Instead of relying on RS232C-specific handshaking and control signals, the system uses network packets to transmit distance determination commands and responses, replacing the mechanical communication layer while maintaining the functional equivalent for identifier setting.
3Productivity
If data is transmitted immediately upon receipt, then communication efficiency is improved, but accurate distance determination becomes difficult
Solution Approach 1:
The system performs preliminary data accumulation for a predetermined time period before processing distance determination. This preliminary accumulation ensures that all response signals from slave devices are collected and buffered, allowing accurate calculation of network distances based on the complete set of accumulated data rather than immediate transmission.
Solution Approach 2:
The system implements periodic action by accumulating data over a predetermined time period at regular intervals. This periodic accumulation approach balances communication efficiency with measurement precision, allowing the system to process data in structured time blocks that ensure complete collection of response signals while maintaining efficient communication flow.
Data Source
AI summary
An identifier control device includes: a cumulative transmission and reception initiation control unit that instructs a plurality of controlled devices, via a network, to initiate cumulative transmission and reception; a distance determination command transmission unit that transmits to each of the plurality of controlled devices via the network a distance determination command; a distance recognition unit that determines the distances on the network with respect to the respective plurality of controlled devices, based on response signals transmitted by the respective plurality of controlled devices after the accumulation time has elapsed from when each of the plurality of controlled devices receives the distance determination command; and an identifier control unit that sets to each of the plurality of controlled devices, via the network, an identifier for each of the plurality of controlled devices determined based on the determined distances on the network.