Multidrop Network Dynamic Node Addition and Collision Prevention
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Solution Overview
Problem
Existing multidrop network systems cannot support instant packet transmission and do not allow new nodes to dynamically join, as they require preplanned node numbers and fixed transmission schedules, preventing flexible and immediate data exchange.
Innovation Solution
A multidrop network system with N network devices, including a master and slave devices, uses identification codes to determine turn-based transmission opportunities, allowing for dynamic node addition and instant transmission by checking for cut-in signals within predetermined time slots, enabling flexible data exchange without packet collision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If preplanned node numbers and fixed transmission schedules are used, then packet collision is prevented, but instant transmission and dynamic node addition are not supported
Solution Approach 1:
The patent implements a dynamic transmission opportunity allocation mechanism where nodes can dynamically join the network and obtain transmission opportunities based on their identification codes. The system transitions from static preplanned schedules to dynamic allocation, allowing nodes to transmit instantly when they have data to send, while maintaining collision prevention through the turn-based opportunity structure.
Solution Approach 2:
The patent uses identification codes assigned to each node as a preliminary mechanism to determine transmission opportunities. This preliminary assignment of unique identifiers allows the system to dynamically manage transmission rights without requiring preplanned schedules, enabling both instant transmission and dynamic node addition while preventing collisions through the structured opportunity allocation.
2Stability of the object's composition
If all nodes transmit in turn according to allocated time slots, then network order is maintained, but nodes with instant transmission demands cannot transmit preferentially
Solution Approach 1:
The patent changes the parameter of transmission opportunity allocation from fixed time slots to identification code-based dynamic allocation. This allows nodes with instant transmission demands to obtain transmission opportunities immediately based on their ID codes, eliminating unnecessary delays while maintaining network order through the structured turn-based mechanism.
3Device complexity
If a fixed number of nodes are sustained in the multidrop network, then transmission scheduling is simplified, but the network cannot adapt to changing node configurations
Solution Approach 1:
The patent creates a universal transmission opportunity allocation mechanism based on identification codes that works regardless of the number of nodes in the network. This multi-functional approach allows the same mechanism to handle both fixed and dynamic node configurations, providing adaptability while maintaining relatively simple scheduling logic through the ID-based turn-based system.
Data Source
AI summary
A multidrop network system includes N network devices. The N network devices include a master device and multiple slave devices, and each network device has an identification code as its own identification in the multidrop network system. The N network devices have N identification codes and obtain transmission opportunities in turn according to the N identification codes in each round of data transmission. Each network device performs a count operation to generate a current count value, and when the identification code of a network device is the same as the current count value, this network device obtains a transmission opportunity. After a device obtains the transmission opportunity, it determines whether a cut-in signal from another network device is observed in a front duration of a predetermined time slot, and then determines whether to abandon/defer the right to start transmitting in the remaining duration of the predetermined time slot.