Wireless and Cellular Telecommunications, Third Edition
Just in time for the rebounding wireless industry, this updated classic text offers an in-depth engineering guide for both voice and data services, Wi-Fi, 3G, WiMAX, and more.
TABLE OF CONTENTS Wireless and Cellular Telecommunications, Third Edition
Chapter 17: Intelligent Network for Wireless Communications
17.1 ADVANCED INTELLIGENT NETWORK (AIN)
AIN is a network evolving from the intelligent network (IN). [1]- [3]. It has an independent architecture that allows telecommunication service operators to rapidly create and modify services for both network performance and customers' needs.
In the intelligent network concept, the service providers need more control for new service offerings. The IN is able to separate the specification, creation, and control of telecommunication services from the physical switching network such that the HLR (home location register) and the VLR (visitor location register) are no longer integrated in the MSC (mobile switching center).
17.1.1 Intelligent Network Evolution
17.1.1.1 History of Network Evolution
In the 1960s, crossbar switches were developed and demonstrated to be very reliable switches. However, crossbar switches are mechanical and do not provide the intelligence. Then, the No. 1 ESS (electronic switching system) was developed by AT&T and provided stored program control (SPC) capability. In 1965, SPC delivered call waiting and centrex features on No. 1 ESS. In the 1970s, ESSs provided intelligent in-network management and maintenance and offered operations systems (OS) and operation, administration, and maintenance (OA&M). In the 1980s, the intelligent network introduced centralized databases and provided the network database services such as 800 toll-free calls and calling card calls. In 1983, the centralized databases were located at the service control point (SCP) to support alternate billing services (ABS) and 800 calling. The data flow from the physical switches to the SCP is via SS7 (Signaling System No. 7) network.
Copyright The McGraw-Hill Companies, Inc. 2006 under license agreement with Books24x7
