The concept of the Intelligent Network (IN) is based on the notion that it is most efficient to separate service/control logic from switching logic. Intelligent networks will therefore typically be anchored by centralized service and control logic, usually hosted by a Service Control Point or another database.
IN is utilized in both wireline as well as mobile networks. While some of the same services/features are deployed in both, the standards involved are different. Wireline networks rely on Advanced Intelligent Network (AIN) standards developed by Ericsson (formerly Telcordia, formerly BellCore) in the United States networks and the Intelligent Network Application Part (INAP) in the European networks and other parts of the world.
SS7 is the fundamental enabling technology for IN and applications.
Intelligent Networks in United States
- IN/1, Bellcore 1986
- SCP only a simple “number translator”
- SS#7 as common channel
- IN/2, Bellcore 1987
–Expanded IN/1 functionality
- No switch dependency
- Rapid deployment of new services
- IP concept was introduced
- IN/1+, Bellcore 1988
–Interim, downsized solution to IN/2
–Timescales unrealistic, too
–Both IN/2 and IN/1+ were rejected
- AIN (Advanced IN), Bleacher 1989
–Influenced by IN/2
–In co-operation with other organizations
–Service-, switch- and equipment- independent IN-systems
–Stepwise development via number of releases
- AIN Rel. 0.1, IN/1-based implementations
- AIN Rel. 0.2, additional specifications for Rel. 0.1
- AIN Rel. 1, target AIN-architectures
–AIN Rel. 1 1995-8
Intelligent Networks in Europe
- CS (Capability Sets), ITU-T, ETSI 1989 –
–European equivalent to AIN
–Define basic IN-services (e.g. freephone, premium rate and UPT)
–Service independent building blocks, SIBs
- basic IN-service functional entities (e.g. digit collect and analyze, time and date functions)
- ideal service creation by grouping SIBs
–Development in phases
- CS1, published 1993
- CS2, published 1999
- CS3, design started 1997
- CS2 specifies management interfaces and call-unrelated switching functions
- CS3 focus on mobility management (e.g. GSM 2+ and 3 integration) and Interoperability of IN and other networks (e.g. CAMEL)
Mobile networks historically relied upon extensions of core INAP technology for GSM networks. However, Customized Applications for Mobile Enhanced Logic (CAMEL) standards have been extensively deployed for IN with GSM networks.
For non-GSM (ANSI-41 based networks), the Wireless Intelligent Network (WIN) standard provides support for ANSI-41 capabilities.