The accounting database is the core of the business support system of communication operators as it is responsible for data synchronization, top-up payment and billing records  of hundreds of millions of subscriber. With the large-scale implementation of 5G services, the billing system has increasingly high requirements for the database's  guaranteed capability of high availability under  high concurrency. This time, AntDB helped a provincial devision of China Mobile to complete the independent and controllable transformation of the core database which is hard to implement but has high complexity and significant effect on business. Since the day it was put into operation, the system performance was significantly improved and stable operation for nearly a year.

　　Figure 1：Overall architecture of AntDB

　　Breaking the "bottleneck”  AntDB application background

　　AntDB , as a pioneer among domestic databases, relying on AsiaInfo's 14 years of deep experience in the carrier field and profound accumulation of carrier business technology, serves over 1 billion telecom users nationwide, with product features such as high performance, elastic scalability, high reliability, etc., which enable it to handle millions of core telecom transactions per second at peak. With the advantage of continuous smooth operation in the core system for many years, it became the operator's first choice.

　　A general manager of the information system operation department of China Mobile in one province said that a key to choosing the type of core system was that it has the efficiency of an in-memory database and the scalability of a distributed database, as well as a high-availability design, which was also the reason why AntDB databse was chosen.

　　Empowering “information innovation”  AntDB value analysis

　　AntDB is an independently domestic telecom-grade distributed relational database product with many tenants, high performance and online scalability, which is secure and reliable. with automatic high availability, high performance, extreme stability and other features, integrating AP and TP operations, AntDB supports hundreds of millions of users, providing petabyte-level data processing capabilities that is characterized by high concurrency, high throughput, and low latency. It has been successfully applied to the core business systems of China Mobile, China Telecom and China Unicom, and has been successfully implemented for commercial purpose in telecom, finance, broadcasting, transportation and Internet of Things industries at home and abroad. Product advantages are as follows:

　　1. "Telecom-grade" high availability, high security and strong consistency attributes: with highly available internal switching capability in "one master, multiple slave" cluster and excellent "multi-location, multi-center" disaster recovery capability, it meets the requirements of "telecom-grade" and "financial-grade" data security and strong consistency.

　　2. Support high concurrency and high performance of system: The product introduces thread pool/co-processing model to support millions of concurrent connections; it forms a high-performance distributed system based on RDMA (Remote Direct Memory Access) high-speed network.

　　3. Online elastic scalability, PB-level processing capacity: Support horizontally automatic expansion and reduction of capacity under business non-stop; adopt tiered storage technology to efficiently support business needs and achieve PB-level data management.

　　4. Independent and controllable, supporting domestic adaptations: With independent intellectual property rights and native distributed architecture, it is fully adaptable to Kunpeng, Feiteng, Unisys and other domestic processors, servers, operating systems and chips, providing a quality choice for the procurement of independent and controllable projects in various industries.

　　5. Customized product, visible effect: it can be customized according to customer’s demand with dozens of visible indicators being clear. It is a cost-effective choice for government and enterprise customers.

Figure 2：Application effectiveness of AntDB in the industry

　　Application effectiveness of AntDB in the industry

　　According to the characteristics and business focus of the customer's accounting system, AntDB team designed a customized database transformation implementation plan. The transformed business system and the existing network system ran simultaneously. During the parallel period, the AntDB team and the enterprise field personnel compared the operation results and carried out 4 rounds of static reconciliation, 5 rounds of simulated outgoing reconciliation and 5 rounds of parallel monthly accounts, and the operation results were completely consistent with the existing network system.

　　On the day the system went online, it supported business acceptance nearly 100 million times and business changes millions of times; in the case that system interface time consumption was nearly the same as before the cutover, the number of single node connections was increased from 8000 to 100000; since the cutover, the accounting system had 0 failures and 0 complaints from users. The overall efficiency of billing has increased by 30%, and the number of single-point connections has increased by 12 times.

　　According to a relevent person of China Mobile in one province, AsiaInfo’s solution perfectly meets the “telecom-level”business requirement and improves their business security significantly,which underpins the large-scale expansion of 5G business in China to a large degree. With its well-polished products, hard-working team and high-quality solutions, AsiaInfo once again won the recognition of the customer.

　　The successful launch of this project is an innovative and constructive breakthrough of AntDB in the database field, which has made a positive attempt to the transformation of the core database in the communication industry and accumulated the method and experience for the subsequent comprehensive transformation of the database.

　　AntDB was founded in 2008. On the core system of operators, AntDB provides online services for more than 1 billion users in 24 provinces across the country. AntDB can process one million core communications transactions per second at peak, ensuring the continuous and stable operation of the system for nearly ten years with also. In the future, AntDB database will release greater vitality and provide a powerful engine for high-quality development and digital intelligence transformation of enterprises!