Wireless Automation Group Communication Filtering
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Solution Overview
Problem
Existing wireless automation communication systems face issues with secure and efficient group communication, particularly in scenarios where all nodes cannot communicate simultaneously due to collisions, leading to delays and increased power consumption, especially in battery-powered devices.
Innovation Solution
A method and device configuration that store group and originator identifiers, allowing only matching communications to be accepted, enabling secure and efficient group communication by distinguishing between relevant and irrelevant messages, thus reducing power consumption and eliminating delays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If sequential communication is used to avoid collisions in group communication, then communication reliability is improved, but communication delay increases
Solution Approach 1:
The system pre-assigns communication time slots to different nodes before actual communication occurs. This preliminary scheduling prevents collisions by ensuring that only one node transmits at any given time, while minimizing delays through optimized slot allocation that considers node priorities and communication patterns.
2Use of energy by moving object
If low data bit rate is used to reduce power consumption, then energy efficiency is improved, but communication delay increases
Solution Approach 1:
The communication system dynamically adjusts the data bit rate based on the specific communication requirements. For time-critical communications, higher bit rates are used to reduce delay, while for non-critical data, lower bit rates maintain power efficiency. This dynamic adaptation allows the system to optimize the trade-off between power consumption and communication delay on a per-transaction basis.
3Use of energy by moving object
If group communication is used to reduce power consumption and bandwidth occupation, then energy efficiency is improved, but communication reliability deteriorates due to collisions
Solution Approach 1:
The group communication is segmented into multiple time slots, with each node assigned specific slots for transmission. This segmentation prevents collisions by ensuring that only authorized nodes transmit during their designated slots, while still maintaining the power efficiency benefits of group communication by allowing nodes to sleep during slots not assigned to them.
4Reliability
If secure communication with authentication is implemented, then communication security is improved, but device complexity increases
Solution Approach 1:
The system implements authentication and security measures selectively based on the communication context. For high-security requirements, full authentication protocols are applied, while for low-risk communications, simplified verification is used. This partial application of security measures maintains communication security where needed while reducing device complexity and overhead for routine operations.
Data Source
AI summary
A method of communicating to a group of slaves is provided and includes storing in a slave at least one group identifier and at least one originator identifier, communicating an instruction, a group identifier and an originator identifier to the slaves, accepting the communicated instruction by the slaves, when the group identifier and the originator identifier in the communication match the group identifier and the originator identifier stored in the slave.