Wireless Sensor Network Channel Management via Dynamic Hopping
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Solution Overview
Problem
Wireless sensor networks face challenges in managing channel interference between heterogeneous wireless devices, particularly due to dynamically changing interference signals and physical communication environments, which affect data transmission reliability and latency.
Innovation Solution
A method for dynamically managing wireless channels by counting unavailable channels and informing nodes through ACK frames, using a channel hopping sequence that considers band sizes of adjacent networks to avoid interference, and updating channel states based on reception success to optimize channel usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple channels are used to solve channel interference and collision, then reliability is enhanced, but device complexity increases due to channel management requirements
Solution Approach 1:
The patent changes the state parameters of channels (available/unavailable) based on reception success/failure, and dynamically adjusts channel usage by transmitting unavailable channel bitmap information to enable nodes to adapt their transmission parameters according to current channel conditions
Solution Approach 2:
The patent implements feedback mechanisms where receiving nodes monitor data frame reception success on each channel and feed back unavailable channel bitmap information to transmitting nodes, enabling continuous adaptation of channel usage based on real-time channel quality assessment
2Loss of time
If a time division channel acquiring method is used to resolve data transmission delay, then latency is reduced, but adaptability decreases in handling dynamically changing interference environments
Solution Approach 1:
The patent makes the channel availability state dynamic by continuously monitoring reception success and updating channel states in real-time, allowing the system to adapt to changing interference conditions while maintaining time-division-based transmission schedules
Solution Approach 2:
The patent performs preliminary assessment of channel availability by counting failed receptions before declaring a channel unavailable, and pre-informs transmitting nodes about unavailable channels through bitmap information to prevent unnecessary transmission attempts
3Reliability
If channel state monitoring and unavailable channel bitmap transmission are implemented, then data transmission reliability improves, but energy consumption increases due to additional communication overhead
Solution Approach 1:
The patent extracts only the essential unavailable channel information into a compact bitmap format, transmitting only necessary channel state data rather than complete channel monitoring information, thereby reducing communication overhead while maintaining reliability
Solution Approach 2:
The patent discards transmission attempts on unavailable channels by informing nodes about their unavailability, preventing wasteful energy consumption on doomed transmissions while recovering energy through reduced retransmission needs
Data Source
AI summary
A method for dynamically managing wireless channels to minimize channel interference between heterogeneous wireless devices, and transmitting data by effectively using channels, is provided. Interference between heterogeneous wireless networks is avoided in a channel hopping mode, whereby a data transmission success rate of the wireless sensor network is enhanced, thus enhancing reliability of data transmission.