Abstract
With the fierce research on the space and terrestrial network, the satellite network as the main component has received increasing attention. Due to its special operating environment, there are temporary link failures caused by interference and permanent port failures caused by equipment problems. In this paper, we propose a new satellite network routing technology for fault recovery based on fault detection. Based on Bayesian decision, this technology judges the probability of each fault by a priori probability of the two faults to achieve the purpose of effectively distinguishing between two types of faults and locate faulty links and node ports. Then, corresponding to the previous two stages of the fault detection, different stages and different methods are updated for different types of fault. We also combine satellite network data from satellite simulation software to validate our study. The results show that the recovery strategy has good performance, and the effective resource utilization rate is improved significantly.
Highlights
In recent years, emerging network service and application are driving the fierce development of space and terrestrial network and the sixth-generation mobile communication technology; satellite network, as an important part of both, has received more and more attention
The space environment is different from the ground. e ground network is located in the atmosphere and is surrounded by the Earth’s magnetic field. e environment is relatively stable. e space environment is susceptible to interference due to cosmic celestial activities, adjacent constellations, and ground communications equipment. erefore, satellite networks undertaking complex service traffic fail frequently [2]. erefore, this paper mainly considers the fault detection of satellite network and the corresponding antidestructive routing after the fault
It should be noted that, in order to meet the special needs of satellite networks, this mechanism assumes that the receiving end node of the failed path belongs to the set of unreachable area R. is assumption will cause an increase in suspected faulty links compared to the original definition, and the accuracy rate may decrease
Summary
In recent years, emerging network service and application are driving the fierce development of space and terrestrial network and the sixth-generation mobile communication technology; satellite network, as an important part of both, has received more and more attention. The traditional satellite network route [3] restoration technology does not consider the difference between the causes of the two types of failures, which may lead to the situation of abandoning a completely normal node in route restoration. We first propose a new low-overhead information collection mechanism that collects and splits relevant information for successful transmission paths within Δt time and calculates reachable, unreachable, and unknown areas On this basis, based on the Bayesian decision theory, when the known conditions are limited, the posterior probability index representing the posterior probability of different types of faults on each link is obtained through a priori probability of different fault types.
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