5G network slice topology design and reliable mapping method for bottom node failure

Abstract

The invention relates to a 5G network slice topology design and reliable mapping method for bottom node failure, belonging to the technical field of mobile communication. The method comprises the following steps: a 5G network slice reliable mapping model is established; the virtual network operator VNO periodically detects the resource and reliability information of the bottom node; According to the overall reliability requirements of network slices, the reliability objectives of a single virtual network function instance are obtained. According to the real-time node information, the mapping scheme of the slice is judged. If there are resource constraints and the reliability of a single node can not meet the requirements, the network slice must be reconstructed. If both resource and reliability meet the requirements, the optimal mapping scheme is determined according to the criterion of minimizing bandwidth resource consumption while minimizing the difference between the required reliability and the achievable reliability. Otherwise, the slice request is rejected directly. When the invention realizes the reliable mapping of the network slice, the cost of the operator is reduced atthe same time of the user experience.

Description

technical field [0001] The invention belongs to the technical field of mobile communication, and relates to a 5G network slice topology design and a reliable mapping method for bottom node failure. Background technique [0002] In the 5G era, there will be a variety of application scenarios and differentiated business requirements. Providing services for different types of application scenarios through a single network at the same time will lead to extremely complex network architecture, low network management efficiency and resource utilization efficiency. Network Slice (NS) is an ideal network architecture in the 5G era. Through Network Function Virtualization (NFV) technology, it can realize centralized management and rapid deployment of NS, thereby improving resource utilization and reducing costs. NS is a dedicated network that shares the underlying infrastructure but is completely logically isolated, enabling different application scenarios to customize network functio...

AI Technical Summary

Problems solved by technology

[0002] In the 5G era, there will be a variety of application scenarios and differentiated business requirements. Providing services for different types of application scenarios through a single network at the same time will lead to extremely complex network architecture, low network management efficiency and resource utilization efficiency.

[0004] However, in the network environment, system failures or encountering attacks and accidents often occur and are unavoidable, which makes the underlying physical network not always in an ideal fault-free state

In addition, the physical servers in the data center are usually purchased at low cost, so these servers do not have high reliability, and the failure of a single device in the underlying infrastructure will affect the VNF deployed on it. It passes through the corresponding network functions in sequence, so the failure of any one of the VNFs will cause the failure of the entire slice

[0005] In the research process of the present invention, through in-depth analysis of relevant research, it is found that the existing technology has deficiencies in the following three aspects for non-ideal networks: the resource utilization effect of the underlying network is poor; the reliability of VNF cannot be guaranteed; the success rate of NS mapping is low

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