Wireless Sensor Node Routing via Channel Monitoring
Solution Overview
Problem
Multi-hop routing protocols in wireless communication networks without infrastructure are susceptible to hacking and consume excessive energy, particularly due to malicious nodes falsifying location information and continuous data transmission.
Innovation Solution
A method where nodes select a time interval to broadcast data based on signal presence or absence, reducing energy consumption by minimizing data transmission and incorporating a probability law to make the data transmission moment unpredictable, and using signal quality to weight the selection of intervals for energy savings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If nodes continuously broadcast data to ensure reliable transmission, then data delivery reliability is improved, but energy consumption increases
Solution Approach 1:
The patent implements periodic broadcasting where nodes transmit data at specific time intervals rather than continuously. Each node selects a random time interval from a predefined set and broadcasts data only during its assigned interval, reducing energy consumption while maintaining reliable data delivery through periodic updates.
Solution Approach 2:
The patent uses preliminary monitoring of the communication channel before broadcasting. Nodes monitor the channel during their selected time interval to detect if another node is already broadcasting the same data, and only transmit if the channel is clear, avoiding redundant transmissions and saving energy.
2Use of energy by moving object
If nodes use deterministic time intervals for broadcasting, then energy consumption is reduced, but predictability makes the system vulnerable to hacking
Solution Approach 1:
The patent makes the broadcasting schedule dynamic by having each node randomly select its time interval from a predefined set of intervals. This randomness prevents malicious nodes from predicting when data will be broadcast, making it harder to launch targeted attacks, while still maintaining structured time-based transmission to conserve energy.
3Reliability
If nodes monitor the channel continuously to detect signals, then security robustness against hacking is improved, but energy consumption increases
Solution Approach 1:
The patent implements periodic monitoring where nodes only monitor the communication channel during their assigned time intervals rather than continuously. This reduces energy consumption significantly while still providing security robustness by detecting signals at regular intervals to prevent malicious interference.
Data Source
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AI summary
A method is provided for routing data received during a first time window by a node-forming device of a network having a plurality of nodes suitable for communicating over a wireless communications channel. The method is adapted to select a time slot from a set of predefined time slots in a second time window consecutive with the first time window, to monitor the communications channel between the end of the first time window and the selected time slot in order to detect the presence or the absence of a signal on the channel, and to broadcast the data from an instant of the selected time slot in the event of detecting the absence of a signal and not to broadcast in the event of detecting the presence of a signal. Also provided is a node-forming device that performs the routing method.