International Telecommunication Union
NGN Research in China
Jiang lin-tao
jianglt@ public.bta.net.cn
Workshop on Next Generation Networks: What, When & How?
Geneva, 9-10 July 2003
ITU-T
1. The Development of
Communication Is in
Front of a Crossroad
9-10 July 2003
Workshop on Next Generation Networks: What, When & How?
2
ITU-T
The development of Internet is in front of
a crossroad
o
o
o
o
o
9-10 July 2003
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?
3
ITU-T
The development of communication
network is in front of a crossroad
o
o
o
o
9-10 July 2003
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?
4
The development of the enterprise
network is in front of a crossroad
ITU-T
o
o
o
o
o
o
9-10 July 2003
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 network need 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?
5
ITU-T
The development of communication is in
front of a crossroad
o
9-10 July 2003
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?
6
ITU-T
2. The Driving Force for
Developing the NGN
9-10 July 2003
Workshop on Next Generation Networks: What, When & How?
7
ITU-T
1. NGN is the inevitable trend of the
technique development (1/3)
o
o
9-10 July 2003
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?
8
ITU-T
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
9-10 July 2003
•
3G
•
Data
————→ IP network
————→ IP network
Workshop on Next Generation Networks: What, When & How?
9
ITU-T
2. The demand of the communication
operating industry (1/3)
o
9-10 July 2003
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?
10
The demand of the communication
operating industry (2/3)
ITU-T
o
9-10 July 2003
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?
11
The demand of the communication
operating industry (3/3)
ITU-T
o
9-10 July 2003
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?
12
The demand of the development of the
communication equipments manufacturing industry
ITU-T
o
9-10 July 2003
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?
13
ITU-T
3. The Division of the
Generations of the
Telecommunication
Networks and the IP
Network
9-10 July 2003
Workshop on Next Generation Networks: What, When & How?
14
ITU-T
The reasons and the accordance for the
division
o
o
o
The development of the services promotes the
upgrading of the communication networks;
The determinant accordance for 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:
1.
2.
3.
9-10 July 2003
analog communication technique
TDM based circuit switching technique
packet switching technique
Workshop on Next Generation Networks: What, When & How?
15
ITU-T
The communication network of the first
generation: analog communication network
o
o
o
o
o
9-10 July 2003
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，crossbar exchange）
features:
single service network,
namely the communication
network is only the telephone
network
Workshop on Next Generation Networks: What, When & How?
16
The communication network of the second generation:
circuit switching communication network
ITU-T
o
o
o
o
o
9-10 July 2003
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?
17
The communication network of the third generation:
packet switching communication network
ITU-T
o
o
o
o
o
9-10 July 2003
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?
18
ITU-T
The current communication network:
transitional communication network
o
o
o
o
o
o
9-10 July 2003
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?
19
The meaning of NGN
ITU-T
o
9-10 July 2003
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?
20
The features of NGN (1/2)
ITU-T
o
o
o
9-10 July 2003
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?
21
The features of NGN (2/2)
ITU-T
o
o
o
9-10 July 2003
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?
22
ITU-T
The trend of the development of NGN —
IP communication network (1/2)
o
9-10 July 2003
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?
23
ITU-T
The trend of the development of NGN —
IP communication network (2/2)
o
9-10 July 2003
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?
24
ITU-T
4. The Key Techniques of
NGN
9-10 July 2003
Workshop on Next Generation Networks: What, When & How?
25
The IP communication network (1/2)
ITU-T
o
o
9-10 July 2003
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?
26
The IP communication network (2/2)
ITU-T
o
o
o
o
9-10 July 2003
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 afterservices 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?
27
The general of the key techniques
problems (1/2)
ITU-T
o
9-10 July 2003
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?
28
The general of the key techniques
problems(2/2)
ITU-T
o
o
o
o
o
o
o
o
9-10 July 2003
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?
29
ITU-T
9-10 July 2003
Thank you!
Workshop on Next Generation Networks: What, When & How?
30