Position Indicator Role Switching for Multi-Receiver Wireless Input
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless communication systems using a master-slave system with multiple position detection apparatuses connected to one position indicator face inefficiencies and collisions due to fixed role assignments, leading to power consumption and data loss.
Innovation Solution
A position input system with a position indicator and controller that dynamically switches master and slave roles based on the number of connected position detection apparatuses, using a master-slave system with a polling method to optimize communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a fixed master-slave role assignment is used in wireless communication between a position indicator and multiple position detection apparatuses, then the communication system can be simplified in configuration, but communication efficiency deteriorates due to role conflicts and data collisions when multiple apparatuses connect simultaneously
Solution Approach 1:
The patent implements dynamic role switching between master and slave devices based on the number of connected position detection apparatuses. When one apparatus connects, it operates as slave; when multiple apparatuses connect simultaneously, the position indicator switches to slave role and the first detection apparatus becomes master. This dynamic adaptation resolves the contradiction by allowing the system to maintain simple configuration while optimizing communication efficiency for different connection scenarios.
2Reliability
If the position indicator maintains master role when multiple position detection apparatuses connect simultaneously, then the position indicator can control communication timing, but power consumption increases and data collisions occur due to polling conflicts
Solution Approach 1:
The patent inverts the traditional master-slave relationship when multiple position detection apparatuses connect simultaneously. Instead of the position indicator maintaining master role, it switches to slave role and allows the first connected detection apparatus to become master. This inversion reduces the position indicator's power consumption and eliminates polling conflicts, as the master device (first detection apparatus) is responsible for initiating communication with both the position indicator and the second detection apparatus.
3Productivity
If the position indicator switches roles dynamically based on the number of connected apparatuses, then communication efficiency improves and power consumption reduces, but the communication control logic becomes more complex
Solution Approach 1:
The patent implements preliminary role assignment based on connection order. The first position detection apparatus to connect is predetermined as the potential master device, and the position indicator is programmed in advance to switch to slave role when multiple apparatuses are detected. This preliminary action simplifies the control logic by establishing clear role transition rules before conflicts occur, reducing the complexity of real-time decision-making while maintaining high communication efficiency.
Data Source
AI summary
A position input system includes a position indicator for indicating a position, and a plurality of position detection apparatuses that receive the indication made by the position indicator. The position indicator includes a wireless communication circuit that uses a master-slave system to perform wireless communication with each of the position detection apparatuses. The position indicator includes a controller connected to the wireless communication circuit and configured to perform communication control of the wireless communication circuit to switch roles of master and slave according to the number of position detection apparatuses connected at a same time.