Physical Variable Detection Using Broadcast Time Slots
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing low-cost devices for detecting physical quantities in IoT networks often experience collisions and data loss due to uncoordinated data transmission on communication channels, lacking efficient media access control.
Innovation Solution
A detection device assigned a network address receives a broadcast signal indicating free transmission time slots, preventing data transmission if the signal indicates its address, and allowing transmission if it does not, with a predetermined period for periodic data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If uncoordinated data transmission is used on the communication channel, then device complexity is reduced and cost is lowered, but data collisions occur and data loss increases
Solution Approach 1:
The system performs preliminary actions by having the server entity broadcast free transmission time slot information before the actual data transmission occurs. Detection devices use this advance information to coordinate their transmissions, preventing collisions while maintaining simple device architecture. The server entity proactively provides transmission schedules, allowing devices to prepare and transmit at appropriate times without complex MAC protocols.
2Reliability
If complex media access control procedures are implemented, then data collision is prevented, but device complexity and cost increase
Solution Approach 1:
The server entity acts as an intermediary that coordinates transmission between detection devices and the communication channel. Instead of implementing complex MAC procedures in each detection device, the server entity receives free time slot information from a network manager and broadcasts this coordination information to all devices. This centralizes the complexity in the server entity while keeping detection devices simple.
3Reliability
If confirmation signals are transmitted to verify data reception, then data transmission reliability is improved, but communication overhead and transmission time increase
Solution Approach 1:
The system implements feedback through the broadcast signal containing free transmission time slot information. The server entity provides feedback about which time slots are available for transmission, allowing detection devices to confirm their transmission opportunities without requiring separate confirmation signals. This feedback mechanism ensures reliable coordination while minimizing communication overhead and transmission time.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The invention relates to a detection device (100) for detecting a physical variable, wherein the detection device (100) is assigned a network address, comprising a detector (101) for detecting the physical variable, wherein the detector (101) is designed to output data which represents the physical variable, and a communication interface (103), which is designed to receive a broadcast signal via a communication network, wherein the broadcast signal has information about at least one free transmission time slot in a predetermined transmission interval, and wherein the communication interface (103) is designed to suppress the transmission of the data in the free transmission time interval if the broadcast signal indicates the network address of the detection device (100).