Uwsns link estimation and route optimization utilizing acoustic channel information

作者：Han Yanyan^*; Li Deshi; Nie Jugen

来源：ICIC Express Letters, Part B: Applications , 2012, 3(1): 171-175.

• Acoustic channels
• Backup routes
• Channel detection
• Channel state
• Data paths
• Environmental change
• Historical information
• Link estimation
• Link prediction
• Maintenance schemes
• Propagation delays
• Reliable data transmission
• Route maintenance
• Route optimization
• Underwater acoustic channels
• Underwater wireless sensor networks
• Water environments

In Underwater Wireless Sensor Networks (UWSNs), data path may be disconnected by link interruption which could result in incorrect data transmission because of high propagation delay, Doppler Effect and the vulnerability of water environment in underwater acoustic channel. This paper focuses on acoustic channel characteristics, makes use of channel state detection and historical information of links to predict link interruption in UWSN and proposes an optimized route reselection means, gives a backup routes maintenance scheme. Furthermore, in case of single route we utilize the periodicity of environmental changes to predict the duration of link interruption. The simulation results indicate that this method can reduce network energy consumption greatly and guarantee reliable data transmission.