Overview of Intelligent Network ConceptsMotivation offer new services quicklythus more revenuefacilitates service differentiation

Distinction between Basic & Intelligent call processingBasic call processingcaller dials number the switching system decides how to process the call Intelligent call processingcaller dials numberthe switching system decides whether to process the call or request assistance from external service logicif external service logic assistance is required theni. switching system sends a message to external service logicii. external service logic processes message and informs switching system how to process the callEnabling the switching system to access external service logic is principle of intelligent networks

Development of Intelligent Network ConceptStage 1Logic and data needed to implement a service separated from switching systemVery service dependent, however better service management, maintenance and control resultedStage 2Interface between the switching system and 'intelligent' service processing was standardised Based on SS7Still service dependentStage 3Open call processing environment Flexible service-independent systems

Physical ElementsService Switching Point (SSP)Switch with intelligence to recognise when call processing at external service control point (SCP) is requiredImplemented using 'triggers'Switching system can be equipped with i. originating triggers - operate at the originating switching system during call set-upii. mid-call triggers - operate during speech phase of a calliii. terminating triggers - operate at the terminating switching system during call set-up

SSP ContinuedOn recognition of a trigger a message is sent to a Service Control Point (SCP)The response to message will inform the switching system how to proceede.g. terminate the call collect more informationNote the triggers are defined by the Intelligent Network Call Model

Service Control Point (SCP)The Service Control Point invokes Service Logic Programs (SLPs) in response to messages from switching systemMultiple Service Logic programs (SLPs)

Adjunct Processor (AP)Similar to Service Control Point (SCP)but local to switching system and connected by a high-speed link.

Intelligent Peripheral (IP)Handles specialised interactions between the user and the intelligent network.Intelligent processor has resources such as tones, announcements, voice recognition

e.g.Service Control Point may instruct switching system to route a call to an Intelligent Peripheral. The IP will interact with the user to obtain more information. This informationis forwarded to the Service Control Point

Service Node (SN)Essentially a combined Service Control Point (SCP) and Intelligent Peripheral (IP)

Intelligent Network Concepts Applied to Mobile Cellular networks