Viettel creates a cutting-edge, future-proof online charging system

Viettel is Vietnam’s largest telecommunications provider, owned by the country’s Ministry of Defense. The company operates across 11 countries, including many underserved and remote regions, offering a diverse array of services from traditional mobile and broadcast telecom to utilities like electric and water billing. As Viettel expanded its reach and diversified its offerings, it required a high-performance, scalable data infrastructure that could support millions of users, a broad spectrum of services, and future innovations in 5G and IoT.

Transforming telecom billing and customer engagement

To support millions of diverse users and combat high churn, Viettel needed to radically modernize its online charging system (OCS).

• Rising churn and demand for personalization

  Viettel faced a rising threat of customer churn due to increased competition and changing expectations. Customers demanded personalized, flexible services and better digital experiences.

• Rapid growth across underserved regions

  Viettel serves regions with limited infrastructure. Its services include not just telecom, but also payments, utilities, and transportation systems. Supporting these diverse use cases required a converged, scalable charging solution.

• Multi-device and hybrid services complexity

  As family households adopted more devices, Viettel needed to support shared and hybrid service bundles with the ability to personalize and scale these services seamlessly.

• Data volume and service agility challenges

  With over 170 million subscribers and exponential service growth, Viettel required a future-ready platform that could maintain sub-millisecond latency while handling 60,000 transactions per second and scaling toward 400 million users.

A personalized, containerized charging platform powered by Aerospike

Viettel selected Aerospike to power its next-generation OCS, which now supports a vast range of telecom and non-telecom digital services at massive scale.

• In-memory configuration for peak performance

  Aerospike was deployed in memory, delivering exceptional performance with nearly 100 percent uptime and simplifying scaling across countries and user segments.

• Customer 360 and DIY personalization

  Viettel introduced customizable service packages where customers define their own attributes, select services, and manage payment methods, dramatically improving customer engagement and satisfaction.

• Containerized architecture with sub-millisecond performance at scale

  Using Aerospike’s Hybrid Memory Architecture (HMA) and a containerized microservices framework, Viettel achieved over 60,000 TPS with sub-millisecond latency, along with rapid, reliable deployment across geographies.

• Seamless integration with digital ecosystems

  The OCS now enables billing for diverse services such as mobile wallets, healthcare, utilities, and toll roads—positioning Viettel as a digital transformation leader across Southeast Asia.

A scalable, award winning transformation in less than six months

In under six months, Viettel launched a high-availability platform that is transforming digital services across 11 countries.

• 170 million users served, scalable to 400 million

  Aerospike empowers Viettel to scale its OCS to over 400 million users across multiple geographies and industries.

• 99.999 percent reliability with 40 percent TCO savings

  The migration from Oracle TimesTen to Aerospike reduced total cost of ownership by 40 percent while delivering five-nines availability.

• Sub-millisecond latency and 60,000 transactions per second

  The new platform achieves exceptional performance with sub-millisecond latency and throughput exceeding 60,000 transactions per second for reads and writes.

• Global recognition for innovation and digital impact

  Viettel’s platform earned honors like the Gold Stevie and Most Innovative IT Service awards.