NGN Research in China

1. NGN Research in China Jiang lin-taojianglt@ public.bta.net.cn

2. 1. The Development of Communication Is in Front of a Crossroad Workshop on Next Generation Networks: What, When & How?

3. The development of Internet is in front of a crossroad • The service capability should be improved. Especially, it should provide multimedia service; • Security Problems; • Commercial Model Problems; • The concept and the requirement of NGI were put forward in 1996. Except the problems on making it larger and faster was solved satisfactorily, no one has been solved very well; • The current techniques can not meet the demand of development. And the direction of the techniques development is not clear. The development of Internet is in front of a crossroad. Workshop on Next Generation Networks: What, When & How?

4. The development of communication network is in front of a crossroad • The society need various services. The multimedia service is the inevitable trend of the service development; • The operators expect to integrate the services, so as to improve the competition ability, and to increase the benefit of the investment; • The current techniques are not enough to meet this demand; • There is no verdict on NGN in the world yet Several points of view still exist at the same time. And the direction of the development of NGN is not clear. The development of NGN is in front of a crossroad. Workshop on Next Generation Networks: What, When & How?

5. The development of the enterprise network is in front of a crossroad • All the services of enterprises have adopted IP techniques; • The core services data of enterprises require the high security and reliability of the network; • The enterprise networkneed to carry real-time services ; • The current IP techniques can not meet the requirement of the development of the enterprise network; • The enterprises are hard to support the network structure of “2 layer +3layer”; • The development of the enterprise network is in front of a crossroad. Workshop on Next Generation Networks: What, When & How?

6. The development of communication is in front of a crossroad • The development of communication network is in front of a crossroad. Which direction should the development of communication network go? What is the trend of the development of NGN? How to develop the communication network next for the domestic operators? What kind of products should the equipment manufactures produce to meet the demand of the future market? All of these problems are puzzling the communication industry, and have affected the development of the communication industry. Workshop on Next Generation Networks: What, When & How?

7. 2. The Driving Force for Developing the NGN Workshop on Next Generation Networks: What, When & How?

8. 1. NGN is the inevitable trend of the technique development (1/3) • The communication network is the outcome of the gradual development. The co-existence of several communication networks (telephony network, data network, Internet etc.) goes against the development of communication. Both the users and the operators hope to simplify the network in order to integrate all the communication services to a single network, which can decrease the operation cost. As a result, it can decrease the prices of the communication service. • The current techniques used in the communication network can not meet the demand of the communication development. The development of the communication network need the introduction of new techniques. Workshop on Next Generation Networks: What, When & How?

9. The inevitable trend of the technique development (2/3) IP communication network is the trend of the development packaged voice • Fixed telephone ————→ IP network • full IP solutions • 3G ————→ IP network • Data ————→ IP network Workshop on Next Generation Networks: What, When & How?

10. 2. The demand of the communication operating industry (1/3) • The phenomenon of competition on communication has appeared. It should be the competition of high level. It should be the competition of new services. It should be the competition of new ideas of the operators on network construction, operation and maintenance. This can urge the operators to pay attention to the construction of NGN as well as the development of the new services carried on NGN. Workshop on Next Generation Networks: What, When & How?

11. The demand of the communication operating industry (2/3) • The contribution rate of telephone service to the communication service is decreasing. And that of data service and integration service is increasing at the same time. This urges the operators to start the construction of NGN as early as possible, which is beneficial to the development of new services, so as to realize a new economic point of growth. Workshop on Next Generation Networks: What, When & How?

12. The demand of the communication operating industry (3/3) • The traditional operators want to supplement their communication services networks to make them complete. And the new operators hope to establish communication networks to enter into the communication services field. They are sure to adopt new techniques to realize this instead of adopting traditional techniques. So the demand for the NGN techniques is very urgent. For the operators in China, It is not simply the problem of NGN, but the problem of how to establish the NGN and what kind of network should be established. Workshop on Next Generation Networks: What, When & How?

13. The demand of the development of the communication equipments manufacturing industry • The technique trend is not clear. The investment motives are dispersed. And the investment risk increases. In the past 10 years, the new communication techniques have emerged in endlessly. For every technique has its own features, in order to acquire as large as possible the shares, manufacturers have to spend both person and material resources in studying, developing and testing the techniques. When developing the NGN products, for there is no leading one in the current NGN techniques, the technique trend is not clear when investing to the NGN equipments, which results the manufacturers have to invest to all the new techniques. This is why the technique trend is not clear, and the investment motives are dispersed, and the investment risk increases. Workshop on Next Generation Networks: What, When & How?

14. 3. The Division of the Generations of the Telecommunication Networks and the IP Network Workshop on Next Generation Networks: What, When & How?

15. The reasons and the accordance for the division • The development of the services promotes the upgrading of the communication networks; • The determinant accordancefor the division of the generations of communication networks is the basic technique or the “core technique”; • For more than a hundred of years, the basic techniques or the “core techniques”are listed as following in order: • analog communication technique • TDM based circuit switching technique • packet switching technique Workshop on Next Generation Networks: What, When & How?

16. The communication network of the first generation: analog communication network • core technique: analog communication technique • services: telephone • transmission technique: analog transmission technique • switching: analog circuit switching (manual connection, step by step system automatic telephone exchange，cross- bar exchange） • features: single service network, namely the communication network is only the telephone network Workshop on Next Generation Networks: What, When & How?

17. The communication network of the second generation: circuit switching communication network • core technique: TDM based circuit switching communication technique • services: telephone • transmission technique: TDM based digital transmission technique (SDH, PDH etc.） • switching: TDM based switching technique (digital process controlled exchange） • features: single service network, namely the communication network is only the telephone network Workshop on Next Generation Networks: What, When & How?

18. The communication network of the third generation: packet switching communication network • core technique: packet switching communication technique • services: telephone service, data service, multimedia service • transmission technique: packet based digital transmission technique • switching: packet switching technique (packet exchange, Router etc.） • features: the multiple services network and the single service carrying network are separated. So does the service network and the service carrying network. Workshop on Next Generation Networks: What, When & How?

19. The current communication network: transitional communication network • core technique: circuit switching and packet switching technique • services: telephone service, data service, multimedia service • transmission technique: TDM based digital transmission technique (SDH, PDH etc.） • switching: circuit switching technique (digital process controlled exchange ）and packet switching technique (packet exchange, Router) • features: Multiple services network co-exists with multiple service carrying network. So does the service network and the service carrying network are separated. • trend of development: The current communication network is in front of a crossroad, and need a clear development direction. Workshop on Next Generation Networks: What, When & How?

20. The meaning of NGN • NGN is a kind of communication network with all the features of the third generation communication network, which is controllable, maintainable and administrable, with a good commercial mode and the objective of commercial operation. Workshop on Next Generation Networks: What, When & How?

21. The features of NGN (1/2) • a communication network based on the packet switching technique; • a network which is controllable, maintainable and administrable, with a good commercial mode and the objective of commercial operation; • the multiple services network and the single service carrying network are separated. So does the service network and the service carrying network; Workshop on Next Generation Networks: What, When & How?

22. The features of NGN (2/2) • a safe and dependable network; • a network with the capability of providing QoS of telecommunication level; • a network with the capability of sustainable development, high practicability and high expansibility; Workshop on Next Generation Networks: What, When & How?

23. The trend of the development of NGN — IP communication network (1/2) • The IP communication network is completely different from the IP network which is designed on the basis of Internet concept. It maintains the essential key features, namely the IP communication network will be based on the packet switching technique, adopting the connectionless-oriented working method. The complex stream controlled technique will not be used among the nodes of the network equipments. Especially the connectionless-oriented working method and the absence of the complex stream controlled technique are the soul of the IP network, and are unchangeable. Workshop on Next Generation Networks: What, When & How?

24. The trend of the development of NGN — IP communication network (2/2) • The IP communication network will adopt the design concept based on the communication network which is a commercial network, and is controllable, maintainable and administrable, with a good ecotypic mode. It does not operate with the users as core elements, and the self-restrict of the users as basis, but is established on the basis of the complete and comprehensive administration of network by the operators. The security of the service network and the trust between the nodes of the service network equipments are guaranteed by the network operators. Also the insurance of the resources required for the service network for the QoS and the assignment and the preparation of the network resources are provided by the network operators. Workshop on Next Generation Networks: What, When & How?

25. 4. The Key Techniques of NGN Workshop on Next Generation Networks: What, When & How?

26. The IP communication network (1/2) • The IP communication network is a network that adopts connectionless-oriented packet switching technique, based on the TCP/IP protocol. It can carry all the current communication services, and realize the complete integration of all the communication services into a single IP network; • The IP communication network is a network of IPv6, Which has abundant address resources, and can support the sustainable development of the communication network; Workshop on Next Generation Networks: What, When & How?

27. The IP communication network (2/2) • It can assign the all the network resources automatically according to the design requirements for the services by the operators, so as to guarantee the QoS of the current communication services and the services possibly generated in the future; • It is a safe and reliable network, which provides degree of reliability and safe mechanism; • It is a administrable and maintainable network, which has the capability of providing comprehensive after-services to the operators. • It is a value-added chain, which has the capability of making all the merchants on it be profitable; Workshop on Next Generation Networks: What, When & How?

28. The general of the key techniques problems (1/2) • The IP communication network is completely different from the IP network which is designed on the basis of Internet concept. It maintains the essential key features, namely the IP communication network will be based on the packet switching technique, adopting the connectionless-oriented working method. The complex stream controlled technique will not be used among the nodes of the network equipments. Especially the connectionless-oriented working method and the absence of the complex stream controlled technique are the soul of the IP network, and are unchangeable. Workshop on Next Generation Networks: What, When & How?

29. The general of the key techniques problems(2/2) • The problem of the QoS of the IP communication network; • The security and the reliability of the IP communication network; • The commercial model and relative techniques of the IP communication network; • The profitable model of the service network; • The network that can be sustainable developed (the network of IPv6); • The technique problems on high speed and broad bandwidth • The individualized communication capability; • The integrated services system of single carrying network and multiple accessing techniques. Workshop on Next Generation Networks: What, When & How?

30. Thank you! Workshop on Next Generation Networks: What, When & How?