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Home Subscriber Server – Korea Telecom

Altibase enables Korea Telecom to cope with problems with user authentication and authorization that undermine its IP multimedia subsystem. Altibase was chosen over Oracle TimesTen.

Use Case: Home Subscriber Server (HSS)

Current Customer: Korea Telecom

Industry: Telecommunications

Who

Korea Telecom (KT) is South Korea’s largest telecommunications service provider with over 40 million users. With deep wired and wireless expertise, KT has tremendous strengths in fiber optics, digital multimedia services and both wired and wireless broadband services.

Problem

KT sought reliable, real time solutions for its core HSS. HSS uses a database that manages such subscriber-related information in LTE and IP multimedia subsystem network as mobile management, user authentication, security and service processes.

However, the growing demand from its 40 million customers utilizing KT’s IP multimedia core network system rendered KT’s legacy database obsolete. Other problems related to its legacy database systems included:

HSS is a service that requires extremely high throughput and low latency as well as stability and high availability. The existing databases failed to meet those requirements.

The intrinsic complexities of HSS strained KT’s legacy on-disk databases, resulting in excessively high usage of system resources, increased failure points, and prolonged latency.

KT needed a comprehensive solution that could easily handle over 1 million subscribers per second for numerous concurrent authentication and authorization attempts.

KT also required a future-proof database solution that would be able to handle user growth and absolute growth in multi-device demand.

Solution

After a series of benchmark tests, Altibase was chosen over Oracle TimesTen. Altibase’s in-memory features have helped KT with seamless management of all HSS-related requirements while creating a robust foundation for KT’s future growth.

Results

KT is now able to store and process subscriber location information in real time.

KT is now able to manage authentication information without losing any of it via Altibase’s unique replication functions,

Altibase arms KT with the ability to authenticate up to 100 million times per day, future-proofing the company’s ability to handle growth

Altibase allows for performance enhancement by multiples vis-a-vie the legacy systems.

KT is now able to operate HSS more reliably without data losses and processing delays.

Altibase has proved to excel Oracle TimesTen in overall performance as well as in complex queries.

In addition, Altibase performs more stable than Oracle TimesTen in terms of data durability in case of system failures.

Altibase is now used as the core database for many of KT’s other mission critical systems.

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