AWS re:Invent 2025 - Build resilient and low-latency hybrid telecom infrastructure at scale (HMC328)

Building Resilient and Low-Latency Hybrid Telecom Infrastructure at Scale

Introduction to Liberty Latin America

• Liberty Latin America is a leading telecommunications operator in Latin America and the Caribbean
• Operates in over 20 countries with a revenue of $4.4 billion and 10,000 employees
• Owns an extensive submarine fiber network connecting over 40 markets with 50,000 km of fiber optic cables
• Operates under different brand names in various countries, including Liberty, BTC, Flow, and Mas Movil

Challenges After Acquiring AT&T's Mobile Network in Puerto Rico

• Liberty Puerto Rico was previously only a fixed-line operator, not a mobile operator
• Acquired AT&T's mobile operations in Puerto Rico in 2019, requiring migration of over 2 million subscribers
• Existing IT stack was not designed for mobile operations, lacked scalability and cloud-native capabilities
• Needed to build a new charging system with low latency (< 50ms) to connect to the EPC and 5G core
• Puerto Rico's vulnerability to hurricanes and natural disasters required a highly resilient infrastructure

Hybrid Cloud Architecture Solution

On-Premises Components

• Core mobile network components (DRA, STP) located in Puerto Rico data centers
• AWS Outpost instance of the charging system (OCSS) deployed locally in Puerto Rico
• 10ms network latency between mobile core and charging system

Disaster Recovery in Miami

• Passive instance of the charging system deployed in the AWS Miami Local Zone
• Fully redundant and replicated solution, with two 10Gbps Direct Connect links for connectivity

Regional Components

• Salesforce for product catalog and order provisioning
• Aria for billing and invoicing
• Other SaaS components (payment gateway, CRM) integrated into the solution
• Internal workloads (OSS, mediation) also running in the AWS region

Network Connectivity

• Leverages Liberty's extensive submarine fiber network and proprietary low-latency fabric
• Transit Gateway manages routing and traffic inspection using AWS Network Firewall

Key Takeaways and Benefits

• Enabled Liberty to become a cloud-native telco, with a replicable template for future acquisitions
• Hybrid architecture solved constraints around low latency, data residency, and resilience
• Seamless failover and failback of the charging system application
• Prioritized proximity of charging system to mobile core over customization, enabling agility
• Adopted cloud-native vendors for the entire solution stack to support rapid time-to-market

Conclusion

• The hybrid cloud solution built by Liberty Latin America in Puerto Rico demonstrates the ability to deliver resilient and low-latency telecommunications infrastructure at scale
• By leveraging its proprietary fiber network and AWS services, Liberty was able to overcome the challenges of the mobile network acquisition and build a future-ready, cloud-native platform
• This approach can be replicated across Liberty's other markets, enabling the company to rapidly expand its mobile offerings and compete effectively in the region.