![]() The following figure shows the four strategies for DR, which are highlighted in the DR whitepaper. Each NF has a different objective focus, thus different types of DR strategies can be applied. On the other hand, UDM would matter to both RPO and RTO because it deals with the subscriber profile and information. In the case of 5G NFs, AMF, SMF, and UPF – like most core functional components – would matter to RTO, since these components play a key role in the fast recovery and restoration of 5G voice and data services. We focus on how AWS services can aid in DR implementation within the context of the 3GPP standard architecture. ![]() ![]() Therefore, even though these services can be applied to specific components or elements of NFs, this post aims to take a more holistic view. ![]() Furthermore, those services are not always applicable to all components of the core network. However, the 5G core network applications focused on in this post have stronger requirements for networking interfaces and protocols based on the 3GPP standard. In the case of general applications running on AWS, known services for DR include AWS Elastic Disaster Recovery ( AWS DRS) and Amazon Route 53 Application Recovery Controller ( Route 53 ARC). RTO means the acceptable delay between the interruption of service and restoration of service, while RPO means an acceptable amount of time since the last data recovery point. DR model for 5G core network in AWSĪs discussed in DR posts and white papers about DR in the cloud, there are two objectives in DR: Recovery Time Objective (RTO) and Recovery Point Objective (RPO). In addition, it explains how it would apply to a 5G network case first, and then presents key ideas such as how 3GPP architecture can be leveraged to help this DR objective, and how AWS services such as EC2 autoscaling, Cluster Autoscaling, and other functions can help implementation by introducing some open-source examples. This post explains the DR model and strategies for general applications on AWS. In addition, to maximize costs and energy savings, while NFs running on AWS serve swing-over traffic (the migrated traffic to AWS Cloud that was previously destined to the original on-premises site), AWS Graviton instances can be considered to host 5G core NFs. Then, it can provide a fast-scaling-out during the traffic surge event to cope with sudden traffic surges and spikes. Specifically, the Amazon Elastic Compute Cloud (Amazon EC2) Auto Scaling capability, along with horizontal pod autoscaling, and cluster autoscaling features of Amazon Elastic Kubernetes Service (Amazon EKS) can minimize the footprint of Container-based Network Function (CNF) in the VPC for DR. It focuses on utilizing the 3GPP high-availability concept(s) in AWS and related AWS services, such as autoscaling, automation tools, and cost optimization aspects of the network. This post outlines how AWS can be leveraged as another virtual data center environment for the 5G network to achieve “disaster-resiliency” and “disaster-recovery” objectives. This can be done while also allowing them to react promptly to the demand of network changes, such as a burst traffic surge and maintenance event. Compared to the case of building such a redundant network in a traditional telco data center, AWS can help CSPs minimize costs and energy consumption during normal operation. More specifically, since this DR network is an additional network environment that is only required in correspondence to any unexpected failure or outage by disaster or planned maintenance, the design of the network must minimize the cost of resources by having fast scaling-in and scaling-out. This 5G DR network intends to provide scalable and immediate measures against a 5G NF failure, complete data center outage, or the event of a maintenance window. For example, user plane function (UPF) can be on the AWS Local Zone or AWS Outposts for low latency processing.Īmong the various use cases for AWS to host 5G NFs, one of the strong cases that appeals to CSPs, who have already built a 5G core network, would be disaster recovery (DR) or enhanced disaster-resilient network creation using AWS. As emphasized in the 5G network evolution on the AWS white paper, the AWS global cloud infrastructure of AWS Regions, AWS Availability Zones (AZs), AWS Local Zones, and AWS Outposts can provide an effective and elastic environment to host 5G core networks per the characteristics of network function (NF). However, a public cloud and 5G core network deployments on AWS are gaining more attention by identifying practical use cases, such as private networks for enterprises, as well as brand new 5G network creation. The Communication Service Providers (CSPs) in the telecom industry are looking to find more use cases to leverage.
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