# Research on reliability mapping of 5G low orbit constellation network slice based on deep reinforcement learning

## TL;DR

This paper proposes a deep reinforcement learning approach to improve the reliability of 5G low orbit satellite networks by efficiently managing network slices.

## Contribution

A novel deep reinforcement learning model is introduced to address state space explosion in 5G low orbit constellation network slice reliability mapping.

## Key findings

- The proposed method improves network throughput and reduces packet loss in 5G low orbit constellation networks.
- Network faults can be repaired within 0.3 seconds using the proposed reliability mapping approach.
- The method maintains over 98% reliability for varying numbers of network slicing requests.

## Abstract

Reliability mapping of 5G low orbit constellation network slice is an important means to ensure link network communication. The problem of state space explosion is a typical problem. The deep reinforcement learning method is introduced. Under the 5G low orbit constellation integrated network architecture based on software definition network (SDN) and network function virtualization (NFV), the resource requirements and resource constraints of the virtual network function (VNF) are comprehensively considered to build the 5G low orbit constellation network slice reliability mapping model, and the reliability mapping model parameters are trained and learned by using deep reinforcement learning, solve the problem of state space explosion in the reliability mapping process of 5G low orbit constellation network slices. In addition, node backup and link backup strategies based on importance are adopted to solve the problem that VNF/link reliability is difficult to meet in the reliability mapping process of 5G low orbit constellation network slice. The experimental results show that this method improves the network throughput, packet loss rate and intra slice traffic of 5G low orbit constellation, and can completely repair network faults within 0.3 s; For different number of 5G low orbit constellation network slicing requests, the reliability of this method remains above 98%; For SFC with different lengths, the average network delay of this method is less than 0.15 s.