Wireless Controller Backoff Priority for Terminal Congestion
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Solution Overview
Problem
Conventional wireless communication systems in order entry systems for restaurants experience congestion and reduced communication efficiency due to unbalanced packet transmission among multiple handy terminals, as they do not consider the varying number of orders across different areas, leading to unfair communication opportunities.
Innovation Solution
A wireless communication system that includes a controller and multiple communication terminals, where the controller counts and stores the communication number of each terminal, sets back off information indicating priority based on these numbers, and transmits this information to the terminals, allowing them to adjust their back off times accordingly to prioritize communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the same back off time is set for all handy terminals, then the system is simple to operate, but communication efficiency deteriorates when the number of packets is unbalanced
Solution Approach 1:
The patent applies local quality by assigning different back off times to different handy terminals based on their individual communication loads. Instead of using a uniform back off time for all terminals, the system dynamically adjusts the back off time for each terminal according to the number of packets it needs to transmit, thereby optimizing communication efficiency for each local context while maintaining system-wide coordination.
2Reliability
If the back off time is increased according to the number of handy terminals, then wireless communication congestion is reduced, but the number of packets that can be transmitted decreases
Solution Approach 1:
The patent implements dynamics by making the back off time flexible and adaptive rather than fixed. The back off time for each terminal is dynamically adjusted based on real-time communication load conditions and the terminal's position in the priority order, allowing the system to optimize between congestion reduction and packet transmission throughput according to varying operational conditions.
Solution Approach 2:
The patent applies parameter changes by modifying the back off time parameter based on the terminal's priority order and communication load. Instead of using a constant back off time, the system changes this critical timing parameter dynamically for different terminals, enabling fine-grained control over collision avoidance and communication efficiency.
3Productivity
If a fixed priority order is assigned to handy terminals, then communication efficiency is improved, but adaptability to varying communication loads is reduced
Solution Approach 1:
The patent implements periodic action by repeatedly updating the priority order of handy terminals based on their current communication loads. The controller periodically recalculates and redistributes priority orders, ensuring that terminals with higher packet transmission needs receive higher priority. This periodic reconfiguration maintains both communication efficiency and adaptability to varying loads.
Solution Approach 2:
The patent applies feedback by using the communication load information (number of packets) as feedback to dynamically adjust the priority order and back off times. The controller receives feedback about each terminal's communication needs and uses this information to optimize the transmission schedule, creating a closed-loop control system that adapts to changing conditions.
Data Source
AI summary
Disclosed is a wireless communication system including: a controller and a plurality of communication terminals connected to each other for communication, and the controller includes: a first wireless communication section; a communication number control section which counts a communication number of each of the communication terminal communicated and stores the number in the storage section; and a first communication control section which sets back off information indicating priority of communication of the communication terminal according to the communication number stored in the storage section and transmits the back off information through the first wireless communication section to the communication terminal, and the communication terminal includes: a second wireless communication section; and a second communication control section which sets the back off time of communication with the controller shorter as the priority becomes higher based on the back off information received from the controller.