Evolvement Of NGN And Construct The Feasibility Researching Of NGN

Now, telecom network builds very fast in our country, obtains greatperformance, integration communication capability boosts up in evidence. Butalong with the amalgamation about communication industry (telephone,computer, CATV, etc), compressive stress aimed at network increases more andmore, and service demands go diversification. Telecom operators must providemore and more data service,multimedia service to carry alone corporationconsumers , then these new-style multiformity services are difficult to offerbased on current PSTN network . And then compared with foremost internet'senvironment , communication needs from customers have bought greatmovement now , especially after bandwide bottleneck is breached , such asEmail,ERP,SCM,EC etc (based on data service) has been one of the workand life's part, operation's conformity based on data and data , data and voice ,data and image, image and voice has become developmental current in future .NGN adopts shirt-sleeve technique , the maximal characteristic about NGN isthat it inosculates voice service ,data service,video service and multimediaservice,and has good opening , it can provide expand service conveniently .That it's appearance changes conventional singleness network building modeand operation mode. It can depress cost using in building network and plentifulrepetition invest.On the service lay , NGN can provide colligated and opening networkframe including voice service , data service, multimedia service ,etc , it separatesconventional switch device's function modules to absolute network parts,everypart can absolutely be developed, agreement interfaces within every parts baseon corresponding standards . Partly devices boost telecom network openingmore and more. Operators can weave every part's function products to buildnetwork with freedom. Normative interface agreements realize interpenetrationwithin every different network.ON the point of service ,the NGN can offer contain voice,data ,andmultimedia etc , Integrated OPEN net schema . It will tradition switchfunctional module separates alone the network of the parts,that may usefunctional alone development . the parts protocol interface in the standard .theparts enable telecom net buying-into open , operator can as per service neededfree Combined each parts functional product use group of net. Protocol of partsinterface standard may completely part of heterogeneous network interworking.Technologically to say, NGN is the business driver, which separate the businessand the calling control, calling and onload. The NGN is the network on the baseof the same protocol about divided teams. We can have the same protocol whichbig network can accept totally the first time, and also enforce the basement ofthe national information installation (NNI).Using the softswitch technique, NGN can exchange the business terminalby terminal, and merge 3 networks by IP technique onloading any businesses,using IPv6 increase the networks' handing capacity, which also merge the IPlayer and the multi-protocol of ATM/FR,PPP,ETHERNET,SDH and so on byusing the MPLS, and with the help of optical transit network(OTN) and opticalexchange network, the NGN settle the switch of transit with broadband. So, wecan predict the important technique of NGN is the softswitching, high-quickrout, high-capacity optical transit and broadband interface technology, and thesoftswitching is the most important. The character of NGN is under the chargeof a range of capacity which supply the multi-broadband, including everythingin packet, broadband interface, multi-section, and verge network which havequality of service (QoS), core optical network, openly distributed controlconstruction, devided transit and control, openly platform added openly programbring out the intelligent or enforce business, and the web using in administratethe network and business, including the user'self-management. Buy the way,with the character of divided-team network and openly attribute system and thedemand of flexible supply of muti-media business, security and QoS isnecessary to NGN.Go with NGN high-speed development, nearly correlative with the courseof standardization。 At present there are many government departs, vocationrepublic and standardization organizing that participant NGN activity plan. Forexample: Next Generation IP of the IETF, 3GPP, the Next Generation Mobilecommunication of the UMTS, Canadian CANET3, Europe Union NGN. On theother hand, Huawei, Nortel, Lucent, A&B, CISCO, Sonus, many equipmentmanufacturers begin to cosmically empolder and product NGN. And start tohave an examination in the network or cosmically commercial. Through theenergetically devotion the system of NGN technique must be increasinglyclearly and standardization.Base on the Next Generation of the soft switch is a networks Integrated,combine with centralized and distributed. In order to interworking all kinds ofnetworks (PSTN/ISDN, NO.7, ATM, IP), that needs more Signaling andagreement, such as NO.7. Furthermore the NGN Network Element needs somenormal agreement, in order to carry out the Communication of the NetworkElement, such as MGCP/H.248, SIP-T.NGN supports every kind of standard protocol and signaling that includethe SIP and H.323 protocol with support the VoIP , theSIP-T and BICC protocol with network soft switching equipment ,the MGCPof media gateway control used soft switching equipment and H.248 agreement,the SIGTRAN agreement and the other a protocols use for soft switchingequipment,signaling gateway and signaling communication (for example theLDAP and the SNMP).That include the media transmission protocol,theH.323 protocol,the H.248/MECAGO protocol,the MGCP protocol,theSIP/SIP-T protocol,the BICC protocol and so on . NGN achieved networkevolvement with Apply to these standard protocolsActually ,the telecom how to build a syncretic network that as IP net acore ,unify bearer voice ,data and video service ,and founded by the networkschema to evolvement to next generation is a worthy research subject .This article introduced the definition of a new NGN network and developmenthistory and key technical and standard. Then detail the Characteristic and systemConstruction of NGN network. And on this base detail NGN network technical.Theory combine with practice on the current network of JNC, exoatiate anddemonstrate continue extending the networking project of a new NGN network.The NGN network system is open and distribution networking plat. It is ableto offer enrich telecom service, during the researching networkingProject ,we considered that the QOS guarantee of IP bearer network ,interworking of between networks and penetrate of the open and privatenetwork .In the end, I'll prospect from the developing of JNC.Through research this subject, we see telecom is able to open theMarket and benefit room for itself with a new NGN network. And offer newbusiness mode for achieved the inhomoqeneous competition of carriers in drasticmarket competition.