Softswitch for the next generation network (NGN) Lecturer : Dr Le Anh Ngoc Presenter: Nguyen Thi Linh Nguyen Tu Thoan Agenda  Introduction and Background  Softswitch Networking Architecture  Softswitch and next Generation Network  Research Progress of Softswitch Standardization Introduction and background  All that the basic service of traditional telecommunication network is to provide voice service  In this circuit switch , network, hardware and software are not independent  The designers of IP network think that transmit network doesn’t need to transmission services provide end-to-end reliable  Softswitch is a new solution of amalgamation packetbased switch network with Public Switched Telephone Network  Softswitch combines the reliability of PSTN and the flexibility of IP appropriately Introduction (cont)  Softswitch enables the compatibility between voice service of next generation and the switch function of the traditional PSTN transparently What is the softswitch?  Softswitch is the next generation voice and multimedia switch based on the IP technologies Softswitch (software switch) is an equipment and system providing the separating of call control and media procession by software of program control based on packet-switch network (ISC)  Call Agent or Media Gateway Controller is also called Softswitch What is the softswitch? (cont) A softswitch is a device that provides, at a minimum:  Intelligence that controls connection services for a media gateway, and/or native IP endpoints  It has the ability to select processes that can be applied to a call  It can provide routing for a call within the network based on signaling and customer database information  It has the ability to transfer control of the call to another network element  It provides interfaces to and supports management functions such as provisioning, fault, billing, etc Example of softswich Example of softswitch The functions of softswitch  Access control  Interpretation  Routing-selection  Gateway  Management  Call control  Wide-band management  Signaling  Safety  Detail recording of calls and so on Circuit switch vs softswich  Softswich is design to replace the Class and Class switches based on the circuit switching technologies  Softswitch is a software based solution implemented on general purpose computers/servers,  The traditional Class and Class switches are rely on dedicated facilities for interconnection and are designed primarily for voice communications Softswitch Networking Architecture (cont)  Softswitch separates the service control, transmit and medium access and each entity connects and communicates by standard protocols  All the network is divided into four layers:  Medium access layer  Transport service layer  Control layer  Application layer  Softswitch is in the control layer Softswitch Networking Architecture (cont) Softswitch Networking Architecture (cont)  The medium access layer mainly realizes the communication  heterogeneous network and core transmit network  among the heterogeneous network  The transport layer accomplishes the centralization of transmission the control information between the service date & control layer and medium access  The service application layer  Provides planes for the execution, management, created service  Process signaling interfaces with control layer through the open API Softswitch Networking Architecture (cont)  Control layer :  Responsible for controlling the end-to-end session  Decides the setup, continuation and switch of call  Separates call control and media service Softswitch technology Softswitch components The Softswitch at Work Application Servers SS7 Gateway SIP SS7 Digital Cross Connect The softswitch will play a strategic role in the nextgeneration public network infrastructure for voice, video and data communications H.323 Q.931/Q.2931 Softswitch SIP-T Softswitch Cellular Station MGCP MEGACO MGCP SIP IAD with DSL/Cable Modem Media Gateways Softswitch and NGN  NGN converged network allows the creation, deployment and management of all kinds of services  One of the main components of NGN network is softswitch  Softswitch enables integration of different protocols inside NGN network  The main function of softswitch is to create network interfaces gateways between signaling gateways and media Broadly speaking, NGN means all the new network technology and narrowly speaking, NGN means softswitch Softswitch and NGN (cont)  Jiang Lintao thought that the core of NGN is two levels  one is the carrier network such as TDM, ATM, IP  The other is is service network and softswitch plays an important role in it  The core of future VoIP will be softswitch  Hardly define the softswitch as the core of NGN Softswitch and NGN – Lucent Softswitch  More and more governments and organizations have taken part in NGN such as IETF, 3GPP, UMTS, CANET3  Ramnath A and Lakshmi-Ratan in Bell labs provided Next-generation access services controlled by a Lucent Softswitch (Project Saras)  Lucent Softswitch control of DSL and cable access  Lucent Softswitch system architecture Policy server architecture Softswitch and NGN – Lucent Softswitch  The purpose of Project Saras was to develop a software system that solves several major problems that providers of telephone services  The Octavia platform integrates the FRIENDS platform and network equipment that provides the Parlay API Softswitch and NGN Research Progress of Softswitch Standardization  IETF 、 ITU 、 T 、 ISC play the leading role in the research on the softswitch  These protocols will regulate all the researches on the Softswitch  make it possible to interchange products by each company  it can realize the original purpose of softswitch  many telecommunication equipment manufactories are doing researches on new switch transition planes  Softswitch has become the significant technology Summary  Softswtich has much potentials, but it is still in developing lever  NGN based on softswitch is an intact network solution  Some significant factors should not be ignored such as QoS(quality of service), gateway, safety, the methods of operation provision and compatibility Q&A ...  Softswitch enables the compatibility between voice service of next generation and the switch function of the traditional PSTN transparently What is the softswitch?  Softswitch is the next generation. .. Cross Connect The softswitch will play a strategic role in the nextgeneration public network infrastructure for voice, video and data communications H. 323 Q.931/Q .29 31 Softswitch SIP-T Softswitch. .. heterogeneous network and core transmit network  among the heterogeneous network  The transport layer accomplishes the centralization of transmission the control information between the service