Application Study For Softswitch In The Native Network

Now, telecom network builds very fast in our country, obtains great performance, integration communication capability boosts up in evidence. But along with the amalgamation about communication industry (telephone, computer, CATV, etc), compressive stress aimed at network increases more and more, and service demands go diversification. Telecom operators must provide more and more data service,multimedia service to carry alone corporation consumers , then these new-style multiformity services are difficult to offer based on current PSTN network . And then compared with foremost internet's environment , communication needs from customers have bought great movement now , especially after bandwide bottleneck is breached , such as Email,ERP,SCM,EC etc (based on data service) has been one of the work and 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 is that it inosculates voice service,data service,video service and multimedia service,and has good opening , it can provide expand service conveniently . That it's appearance changes conventional singleness network building mode and operation mode. It can depress cost using in building network and plentiful repetition invest.On the service lay , NGN can provide colligated and opening network frame including voice service , data service, multimedia service ,etc , it separates conventional switch device's function modules to absolute network parts,every part can absolutely be developed, agreement interfaces within every parts base on corresponding standards . Partly devices boost telecom network opening more and more. Operators can weave every part's function products to build network with freedom. Normative interface agreements realize interpenetration within every different network.ON the point of service ,the NGN can offer contain voice,data,and multimedia etc , Integrated OPEN net schema . It will tradition switch functional module separates alone the network of the parts,that may use functional alone development . the parts protocol interface in the standard .the parts enable telecom net buying-into open , operator can as per service needed free Combined each parts functional product use group of net. Protocol of parts interface standard may completely part of heterogeneous network interworking.Technologically to say, NGN is the business driver, which separate the business and the calling control, calling and onload. The NGN is the network on the base of the same protocol about divided teams. We can have the same protocol which big network can accept totally the first time, and also enforce the basement of the national information installation (NNI).Using the softswitch technique, NGN can exchange the business terminal by terminal, and merge 3 networks by IP technique onloading any businesses, using IPv6 increase the networks'handing capacity, which also merge the IP layer and the multi-protocol of ATM/FR,PPP,ETHERNET,SDH and so on by using the MPLS, and with the help of optical transit network(OTN) and optical exchange network, the NGN settle the switch of transit with broadband. So, we can predict the important technique of NGN is the softswitching, high-quick rout, high-capacity optical transit and broadband interface technology, and the softswitching is the most important. The character of NGN is under the charge of a range of capacity which supply the multi-broadband, including everything in packet, broadband interface, multi-section, and verge network which have quality of service (QoS), core optical network, openly distributed control construction, devided transit and control, openly platform added openly program bring out the intelligent or enforce business, and the web using in administrate the network and business, including the user'self-management. Buy the way, with the character of divided-team network and openly attribute system and the demand of flexible supply of muti-media business, security and QoS is necessary to NGN.Go with NGN high-speed development, nearly correlative with the course of standardization。At present there are many government departs, vocation republic and standardization organizing that participant NGN activity plan. For example: Next Generation IP of the IETF, 3GPP, the Next Generation Mobile communication of the UMTS, Canadian CANET3, Europe Union NGN. On the other hand, Huawei, Nortel, Lucent, A&B, CISCO, Sonus, many equipment manufacturers begin to cosmically empolder and product NGN. And start to have an examination in the network or cosmically commercial. Through the energetically devotion the system of NGN technique must be increasingly clearly 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 of networks (PSTN/ISDN, NO.7, ATM, IP), that needs more Signaling and agreement, such as NO.7. Furthermore the NGN Network Element needs some normal agreement, in order to carry out the Communication of the Network Element, such as MGCP/H.248, SIP-T.NGN supports every kind of standard protocol and signaling that include the SIP and H.323 protocol with support the VoIP , the SIP-T and BICC protocol with network soft switching equipment ,the MGCP of media gateway control used soft switching equipment and H.248 agreement, the SIGTRAN agreement and the other a protocols use for soft switching equipment,signaling gateway and signaling communication (for example the LDAP and the SNMP).That include the media transmission protocol,the H.323 protocol,the H.248/MECAGO protocol,the MGCP protocol,the SIP/SIP-T protocol,the BICC protocol and so on . NGN achieved network evolvement with Apply to these standard protocols Actually ,the telecom how to build a syncretic network that as IP net a core ,unify bearer voice,data and video service ,and founded by the network schema to evolvement to next generation is a worthy research subject .This article introduced the definition of a new NGN network and development history and key technical and standard. Then detail the Characteristic and system Construction of NGN network. And on this base detail NGN network technical. Theory combine with practice on the current network of JNC, exoatiate and demonstrate continue extending the networking project of a new NGN network.The NGN network system is open and distribution networking plat. It is able to offer enrich telecom service, during the researching networking Project ,we considered that the QOS guarantee of IP bearer network,interworking of between networks and penetrate of the open and private network .In the end, I'll prospect from the developing of JNC.Through research this subject, we see telecom is able to open the Market and benefit room for itself with a new NGN network. And offer new business mode for achieved the inhomoqeneous competition of carriers in drastic market competition.