Tìm hiểu lý thuyết IN trong mạng NGN

Intelligent Networks IN is a framework for implementing value-added in telecommunications networks It is not a set of services and it is more than an architecture alone Intelligent Networks • The IN is an architectural concept that enables real time execution of network services and customer applications in a distributed environment consisting of interconnected computers and switching systems Preface • Intelligent Network (IN) is a concept to specify telecom services, and it has emerged from technical, business and protocol engineering point of view • Intelligent Networks are used by teleoperators for creation and management of value added services in telecom networks • Originally, IN has been applied in telephone and voice services, but it is growing in the service integration of mobile and fixed telephone networks and as gateway to Internet based networks Intelligent Network (IN) • Intelligent Network offers added value – Open standards, vendor independence – Rapid service creation and deployment – Customized services to users – Centralized service management – New opportunities to make business i.e new services, markets and customers – Rapid adaptation to market needs and competition source of Competitive Advantage Telecom Discontinuities • First Wave (1994-2000) – Network operators and Service Providers – Alliance building, fight for market share – Mobile and Value Added growth (IN, data) – Internet becomes the Middleware • Second Wave (2000-2006) – Broadband access technology solved – Service and Content Providers – Third generation mobile technology • Third Wave (2006 - ) – New service and content control based architectures Computer Controlled Services • TMN = Telecommunication Management Network • IN = Intelligent Network Differentiation * * * customer segments * * * Dynamic numbering / networks Local Mobile Business TMN Narrowband Broadband IN Logical subscribers Logical services *** open technology *** IN Architecture • Desirable properties are based on three major principles of independence: • Service independence • Separation of basic switching functions from service and application functions • Independence of applications from lower level communication details IN & Wireless • The independence from physical network configuration and geography is inherent in IN – hence – ideally suited to support basic mobility functions in mobile domain • Rapid development and deployment of services required in highly competitive wireless market IN & Wireless • Focus of IN – Value added services in fixed networks • Wireless – assist network providers and end users with the capability to obtain services regardless of their location and during mobility • Service management access function (SMAF) provides a user interface for external access to the SMF, for example through the Internet • Intelligent access function (IAF) is an interworking function that allows an SCF to control non-IN equipment CS-2 mobile networks • the call-related radio access control function (CRACF) • call unrelated radio access control function (CURACF), and • radio control function (RCF) Physical entities • The physical plane allows for different mappings of IN functions onto physical nodes • Service switching point ( S S P ) : contains the switch, but typically also holds the CCF and SSF • Service control ( S C P ) : contains the SCF point • Service data point (SDP): contains the database or databases that make up the SDF • Service management point (SMP): hosts the SMF • Intelligent peripheral (IP): implements the SRF • It requires at least four or five machines to implement an IN system • In smaller networks or in cases in which there are few services or few service subscribers, • Number of machines can be reduced by colocating certain DFP functions on the same physical node • For performance reasons, the SCP very often also hosts the service databases WIN WIN FEs Location Registration function • Location Registration function provides the service logic and data required for mobility management • The LRF interacts with the RACF and other LRFs to maintain the location and status of mobile stations and provide mobile station notification information LRF • In addition, the LRF supports interactions with the SCF and SSF/CCF in support of routing address resolution for establishing the information exchange path as well as transferring and updating subscriber profiles Radio terminal function (RTF) • Gateway between the wireless user and network call control functions, taking the role of the CCAF in the fixed network case • The RTF supports interactions with the radio control function and the wireless users to establish, maintain, modify, and release calls • The RTF receives indications relating to the call or service from the radio control function and relays them to the user as necessary Radio control function (R C F ) • Establishes, maintains, modifies, and releases radio ports and provides interconnection between the radio and network bearer connections To so, it interacts with the CCF, RACF, and the RTF • RCF also provides radio control capabilities such as carrier generation, signal amplification, selective filtering, modulation and demodulation, radio channel assignment, and supervision Relationships among these FEs • • • • ACF with ACF, RACF, and SCF LRF with LRF, RACF, and SCF RACF with CCF, RACF, and RCF, and RCF with CCF and RTF