Mobile Sink path planning method for underwater heterogeneous sensor network

Abstract

The invention discloses a mobile Sink path planning method for an underwater heterogeneous sensor network. The method comprises the following steps: a dual-layer topology network structure is established; an optimal aggregation node laying location is selected by adopting a fitness function and a grid method; a mobile Sink plans the shortest mobile path and mobiles to transverse all aggregation nodes; a shore-based monitoring center sends a remote control command to the mobile Sink in a multi-hop way through the aggregation node upper network; the mobile Sink changes the mobile path in real time according to the control command. The collection and transmission of the network monitoring data are realized through a multi-mode communication way of the underwater sound and laser communicationand the mobility of the mobile Sink, thereby effectively improving the bottleneck problem that the underwater communication rate and the distance are in conflict.

Description

technical field [0001] The invention belongs to the technical field of sensor networks. Specifically, the invention relates to an underwater heterogeneous sensor network, in particular to a mobile sink path planning method based on a sink node selection mechanism in the underwater heterogeneous sensor network. Background technique [0002] Marine environmental monitoring has become part of the economic development and border security construction of many countries. Building a dynamic and three-dimensional marine monitoring and response system is very important for environmental monitoring, emergency rescue, early warning and defense applications in marine border areas. At present, seabed monitoring mainly relies on resident instruments such as aircraft, wired monitoring stations or submersible buoys for regular detection, and these methods are very expensive. In recent years, due to the development of underwater communications such as underwater acoustics and laser communica...

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Problems solved by technology

[0003] However, there are certain problems in the existing underwater communication schemes. First, the two main schemes of underwater acoustic communication and laser communication have their own obstacles. Among them, underwater acoustic communication provides long-distance communication, which can realize a wide range of underwater sensor networks. Networking and data transmission, such as small-scale data such as temperature and salinity, but due to limited bandwidth (hundreds of bytes per second), it is obviously not enough for the collection of large-scale data on the seabed, such as image and video transmission

Laser communication can obtain high-bandwidth connectivity (up to 10Mpbs), and its energy consumption is 2 orders of magnitude lower than that of acoustic communication, but the communication distance is less than 10 meters, which is suitable for short-distance data exchange between mobile sinks and sensor nodes. This solution requires the mobile sink to traverse and move to the vicinity of all nodes, resulting in a long driving distance of the mobile sink, high energy consumption and high cost

[0004] Second, due to the high importance of some monitoring areas, it is necessary to collect a large amount of data such as images or videos, and the remaining areas only need to collect small-scale data such as temperature and salinity. How to deploy sensor network nodes and take into account different The collection of large-scale data needs to be solved

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