Sensor Network Channel Interference Avoidance via Energy Contour
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Solution Overview
Problem
Existing methods for avoiding channel interference in sensor networks are inefficient due to energy loss from periodic frame transmission, additional energy consumption in topology reconfiguration, inability to handle interference from different types of networks, and lack of consideration for node mobility, leading to communication interruptions and increased energy use.
Innovation Solution
A method using an energy contour to rapidly detect channel interference by measuring and exchanging energy levels between nodes, allowing a coordinator node to switch channels and avoid interference without separate frame transmission, thereby minimizing energy consumption and maintaining network reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate frame is periodically transmitted to detect interference, then interference detection capability is improved, but energy consumption increases
Solution Approach 1:
The patent extracts the interference detection function from separate periodic frame transmission and integrates it into normal data communication. Nodes detect interference by analyzing energy levels in received data frames from neighbor nodes, eliminating the need for dedicated detection frames and reducing energy consumption while maintaining detection capability
Solution Approach 2:
The patent combines interference detection with normal data communication by having nodes simultaneously perform both functions. The same communication channels are used for both data transmission and interference detection, merging two previously separate operations into one efficient process
2Object-affected harmful factors
If transmission power is reduced through topology control to avoid interference, then interference avoidance is improved, but network connectivity deteriorates
Solution Approach 1:
The patent implements dynamic channel selection where nodes can switch between different frequency channels based on real-time interference conditions. Instead of static topology control with fixed power levels, the system dynamically adapts by selecting optimal channels, maintaining connectivity while avoiding interference through flexible channel switching
3Reliability
If topology is reconfigured to connect nodes escaping from transmission range, then network connectivity is improved, but energy consumption increases
Solution Approach 1:
The patent performs preliminary channel selection and interference detection before data communication begins. By proactively identifying suitable channels and avoiding interfered channels in advance, the system prevents communication interruptions and eliminates the need for energy-consuming topology reconfiguration to restore connectivity
4Measurement precision
If a separate frame transmission method is used for interference detection, then detection accuracy is improved, but communication efficiency deteriorates
Solution Approach 1:
The patent enables continuous interference detection during normal data communication without interrupting or pausing useful communication actions. Nodes continuously monitor energy levels in received frames while maintaining data transmission, ensuring both detection accuracy and communication efficiency operate simultaneously without compromise
Data Source
AI summary
A method of avoiding a channel interference in a single channel sensor network, includes periodically measuring an energy of a channel used by at least one node included in the sensor network; exchanging the measured energy of the channel with a neighbor node of the at least one node; receiving energy of all nodes of the sensor network and determining if there is an interference, by a coordinator node, which is a highest node of the at least one node; and when it is determined that there is an interference, switching a channel influenced by the interference to a channel which has been scanned by the coordinator node and is not influenced by the interference, thereby avoiding an influence of the interference.