Three-Dimensional Efficient Regional Cluster Degree Of Broadcasting Algorithm Design In Satellite Sensor Network

Although the Io T(Internet of Things)based on traditional terrestrial cellular networks has matured,sensors in areas such as the depths of the rift valley or offshore buoys are not covered by the terrestrial cellular network and cannot be connected to the Internet of Things.Satellite sensor networks,especially low-orbit satellites,can be used as a supplement to achieve Io T coverage in non-cellular coverage areas because of their easy realization of long-distance communication,and become a new direction for the development of Io T.The direct communication between low-orbit satellites,especially inter-satellite communication for geocast,often consumes a lot of energy,and the satellite energy is limited.Therefore,it is particularly important to have a low-energy route suitable for inter-satellite communication.Based on the above problems,this article studies low-energy routing algorithms suitable for inter-satellite communication,which are mainly divided into the following four aspects:(1)Describes the concepts and technologies related to satellite networks.Introduced the basic knowledge of satellite networks and related networks,including the combination of satellite networks and various ground networks,and research backgrounds at home and abroad.(2)Explore and give the calculation method of Fermat point suitable for satellite network.(1)Improved the calculation method of 3D Fermat points to make it more suitable for inter-satellite communication;(2)Proposed a direct calculation method of Fermat points in three target areas in a 3D environment,that is,the calculation method of Fermat points at four vertices,supplemented The three points in the three-dimensional environment cannot find the insufficiency of the Fermat point.(3)A Fermat node searching algorithm is proposed to find the node that acts as a transit transmission.This algorithm is used to calculate the Fermat point when it is necessary to look for a transit transmission node to make the energy consumption of network transmission more balanced.(4)Propose LEFTR,an efficient geocast algorithm suitable for satellite communication.(1)Proposed the geocast algorithm LEFTR for the two target areas to achieve low-energy data transmission in the two target areas;(2)Extending the algorithm to the three target areas,using the characteristics of Fermat points,constructs a Fermat point tree to achieve Low-energy data transmission in multiple target areas.(5)A forest fire monitoring system is designed.The LEFTR algorithm is used to select the data transmission path to realize the forest fire monitoring with low energy consumption transmission.