A soft exchange, IPv6, etc. can provide multimedia integrated business such as voice, video, data, using open, standard architecture, and can provide rich business NGN emergence and become a hot spot for people.
1, next generation network: life changes
It is popular that the next generation network is a combination of traditional voice services and data multimedia services and cable television networks. The current fixed phone may not be connected to the telephone line, but directly access the local area network, the employee is out, as long as the local area network, enter the ID number, you can easily set it into a personal configuration, others call this number, The call will automatically transfer to the local phone in which employee is located. With NGN, the fixed phone can become functional and roaming functions as the phone. At the same time, you can set the office phone, home phone, and mobile phones, so that no matter what phone calls, what is the phone call, you will go to you smoothly.
Although the industry has aware of the concept of the next generation network, people have reached a consensus: the next generation network combines the telecommunications network, computer network and cable TV network, allowing telecommunications and TV and data business into one. Composition can provide new networks available on three networks, data, video, and various services provided on three networks. The application of these different natures should also be optimized, and the use of network resources is efficient, reasonable, thus achieving maximum extent of network resources.
Since the next generation of networks are in the future of future communication networks, the major operators, including Bell Atlantic, Level3, LGG, British Telecom, UK, and Brazil, etc., including the United States. The major operators (NGN) have begun. test. As early as May 1999, Nortel has achieved the first batch of next-generation networks in cooperation with British telecommunications. Today, the global telecommunications equipment manufacturers have fully developed the next generation of networks, Northern Electric, Lucent, Alcatelli, Cisco, etc., have a strong technical strength and influence.
2. Next generation network: spring is coming soon
Next-generation network, as current operators and equipment manufacturers are actively discussing hot technology, and many standardized organizations and forums abroad, including ITU-T, 11th and 16 Workings, IETF IP Telephony Working Group, Signaling Transfer Work Group, Media Gateway Control Working Group, ETSI Tiphon, International Softswitch Association, MPLS Forum, ATM Forum, DSL Forum, Parlay, etc. ITU-T believes that NGN is the specific implementation of GII, which represents the global infrastructure GII. The development trend of network fusion is a variety of diverse, network interoperability and business interoperability are key content of NGN research. Existing networks have problems. ITU-T 13th Study Group will complete the definition stage of NGN standardization project in December 2002, and fully define the Connotation of NGNs, related network architectures and implementation guides in 2004.
In China, the construction of the next generation network has also been in full swing. NGN technology achieves the integration of business, draws the length of the IP, ATM, IN and TDM, forming a hierarchical full-end architecture, is a revolutionary breakthrough, combined with the new generation of communication business support network technology standards Research will provide strong support for the development of my country's communications industry. my country Network and Exchange Standard Research Group and IP Research Group began related criteria for NGN networks in 2000.
On July 6, 2001, my country's high-speed interconnected test network passed the national identification in Tsinghua University. my country has made a major breakthrough in the field of next-generation Internet research and construction, achieving the international next-generation Internet. BISC / Siemens will use our world's leading NGN solution SURPASS to China Telecom Architecture NGN network, providing integration of voice, data, image, etc., including multiple access methods NGN end-to-end overall solutions; China Telecom The Group has cooperated with the Nortel Network in Beijing, Shanghai, Guangzhou and Shenzhen Deploying Nortel Network Succession NGN solution; in October 2002, the 2nd "NGN Technology Forum" in China from October 2002, from the information industry, education, finance, telecommunications, etc. About 280 experts from domestic and foreign experts, surrounded the development trend of "NGN technology", launched a warm discussion, with the gradual advancement of NGN construction process, the world's traditional network will become faster and faster, we It is completely reason to believe that NGN's spring is coming. Concept instructions:
NGN: Next Generation Network, a comprehensive, open network architecture, can provide multiple services such as voice, data, and multimedia.
SoftSwitch: Softswitch, separate the call control function from the media gateway (transport layer), implement basic call control functions through software, including call selection, management control, connection control (establishment / demolition session) and signaling intercom Thus, the separation of call transmission and call control is achieved, and separate planes are established for control, switching, and software programmable functions.
Media Gateway: Media Gateway converts media in a network into the media format required by another network. For example, the media gateway can be converted between the carrier channel of the circuit switched network and the media stream of the packet network. The media gateway can handle audio, video, or T.120, or can have the ability to process any combination of these three. The media gateway can also be translated by a full-duplex media. The media gateway can demonstrate video / audio messages, implement other IVR functions, or media conferences.
248 / Megaco: Media Gataway Control Protocal, IETF, ITU-T Developed Media Gateway Control Protocol, for communication between media gateway controllers and media gateways; H.248 protocol is also known as Megaco / H.248.
SIP: Session Initiation Protocol is one of the Multimedia Communication System Framework Agreements established by IETF. It is a text-based application layer control protocol, independent of the underlying protocol, used to establish, modify, and terminate both parties on the IP online or Multi-multimedia session.
PSDN: Traditional telephone network.
ISDN: Integrated Business Digital Network Based on Traditional Telenetic Network.
GSM: Currently largest digital cellular communication system.
GPRS: Universal Packet Wireless Service.
3G: Third generation mobile communication.
ITU: International Telecommunications Alliance.
ITU-T: The letter standardization department.
IETF: It is an internet engineering task force.
VOD: Video on demand system.
For more details, please see:
Http://www.edu.cn/20031029/3093528.shtml
