Wireless Sensor Relay Control via Management Device
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Solution Overview
Problem
In wireless sensor systems, the increase in traffic due to data transmission via multiple relay devices leads to inefficiencies, particularly in M2M systems where management devices aggregate sensor data, causing communication bottlenecks and potential data loss.
Innovation Solution
A wireless sensor system that includes wireless terminal devices, relay devices, and a management device, where relay devices transmit communication state information to the management device, which then determines and transmits relay permissibility information to select optimal relay paths based on communication quality, reducing unnecessary relaying and traffic.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If data is transmitted via multiple relay devices in a wireless ad hoc network, then network coverage and connectivity are improved, but traffic increase leads to communication bottlenecks and potential data loss
Solution Approach 1:
The management device dynamically changes the relay permission parameter based on communication state information (such as signal strength, transmission quality) to control whether relay is permitted. This parameter adjustment optimizes the balance between data delivery reliability and traffic volume by enabling relay only when communication conditions are favorable.
Solution Approach 2:
The system implements a feedback mechanism where relay devices transmit communication state information back to the management device, which then adjusts relay permission decisions accordingly. This closed-loop control allows the system to adapt to changing network conditions and optimize traffic management in real-time.
2Ease of operation
If relay devices autonomously relay data in a wireless ad hoc network, then network construction is simplified and immediate, but traffic management becomes uncontrolled leading to bottlenecks
Solution Approach 1:
The management device serves as an intermediary that centralizes traffic control functionality. While relay devices can be deployed freely (maintaining ease of operation), the management device mediates relay permissions based on communication state information, providing controlled traffic management without requiring complex peer-to-peer coordination among relay devices.
3Area of stationary object
If all relay devices relay data from all wireless terminal devices, then data delivery coverage is maximized, but interference and traffic congestion increase
Solution Approach 1:
The system applies different relay permission decisions to different relay devices and wireless terminal device pairs based on local communication conditions. Instead of uniform relay behavior across the network, each relay device receives customized permission decisions based on its specific communication state information, optimizing coverage while minimizing interference in each local context.
Data Source
AI summary
This wireless sensor system includes: one or a plurality of wireless terminal devices each configured to transmit data including sensor information indicating a result of measurement by a sensor; a management device; and a plurality of relay devices configured to relay the data received from the wireless terminal devices, to the management device or another relay device. Each of the relay devices transmits, to the management device, communication state information from one or a plurality of the wireless terminal devices to the relay device. On the basis of the communication state information received from each relay device, the management device transmits, to a relay device as a target, relay permissibility information that enables discernment, for each target terminal which is one or a plurality of the wireless terminal devices, as to whether or not relay by the relay device of the data from the target terminal is permitted.