COURSE: TELECOMMUNICATION
ECONOMICS
PROFESSOR: WUHONG
School of Economics and Management BUPT
Economics Research Center
(MING GUANG 504)
Tel:13621050170
Email: w_hong@263.net
Chapter 3 Communications
Network
Ⅰ
Theoretical foundation of Communications Network
Ⅱ
Telecommunications Network
Ⅲ
The development of Telecommunications Network
Ⅳ Postal Communications Network and its development
Communications Network
• Concept:
A telecommunications network is a network of telecommunications links and
nodes arranged so that messages may be passed from one part of the network to
another over multiple links and through various nodes.
– Telecommunications Network 、 Postal Communications Network，Twoway network．
• Consists of:
– Communication points： Communication points and Communications nodes 。
– Communication links: composing information transmission channels between
the points of Communications Network.
• Which including:
– traditional Communications Network：relative independent 、compartmental
operation (Segmentation operation).
– Modern communications network ——“Information Super Highway”，
amalgamation、 integration is the tide.
LAN Architecture and Topologies
Star network
•
•
•
•
•
•
netty network
Star network
ring network
bus-network
complex network
tree network
netty network
Ring network
bus-network
complex network
• Cellular Network
tree network
Cellular Network
Physical Network
• Physical Network is the practical network consists of hard equipment of
the telecommunications network. From the insight of physical layer ,the
telecommunications network consists of three major systems : a user
equipment, transmission systems and switching systems. Which Can be
presented by a simple schematic.
• User equipment：phone equipment、Data communications equipment、
and Video Terminal .
• Transmission systems：the means by which information travels through
the network, comprising the transmission medium and transmission
interface equipment.
• Switching systems：the means by which (temporary) connections
between the calling party and the called party are established.
Service Network
• PSTN
– PSTN, the Public Switched Telephone Network, is a circuit-switched
network that is used primarily for voice communications worldwide,
with more than 800 million subscribers. Originally a network of fixedline analog telephone systems, the PSTN is now almost entirely digital
and also includes mobile as well as fixed telephones.
– Today typical PSTN: Public Switched Telephone Network for voice and
data communications with both wireless and wire line access
– Hierarchy of china telephone network
• RC: Mobile Communication network
– Reliable radio communication is crucial for border surveillance and
protection. Customs uses short- and long-range radio communication
equipment that includes transportable units for remote areas and
waterproof sets for the marine environment. Communication is possible
between Customs marine craft and commercial ships and yachts.
– Mobile telecommunication system Structure
– Radio Communication network Structure
• DCN: Data Communication Network
– A configuration of telecommunication facilities for the purpose of
transmitting data , as opposed to analog signals.
– Data communication system structure
Data communication system structure
Computer system
Data terminal
Equipment
central processing
unit
Communication
control units
Data links
data circuit terminating
equipment
transmission channel
Digital Circuit-terminating
Equipment
Transmission
Controller
Data input/output
Equipment
Telecommuni
cation circuit
Telecommunication network Technology
Development Trend
• Packet switch network
• NGN with open architecture
• Network Convergence (Triple networks convergence, fixed and mobile
network convergence)
• Broadband multimedia mobile network(3G, B3G)
• Access Broadband, Mobility (FTTH, etc)
• Intelligent Optical Network
• Networking between persons and machines, (person-to person
communications, networking of person-to-machine and machine-tomachine)
Future Telecom Technologies
NGN and services
NGN Numbering Addressing System (such as IPV6,
ENUM, etc)
Quality ＆ Security of Services and Network)
Telecom network, computer network and broadcasting ＆TV
network, fixed and mobile network and services appear
convergence trends
Higher speed, individualized, plug-in, seamless access
N3G technology
Future Telecom Technologies
FTTH, higher-speed and lower-cost wireless broadband
Household Network (WLAN, Bluetooth, UNB)
Super-speed Intelligent Optical Network
Network Security and Emergency Communication Technologies
RFID, Sensor Technology, Biology Technology, grid.
Future communication demand challenge science and technology.
Postal Communication Network
• Postal communication – A type of communication which is an
integrated production technological complex of technical and
transportation means which provides the receipt, handling,
transportation and delivering of postal items as well as postal money
transfer.
• Postal communication network - A unity of postal communication
objects and postal routes.
• Postal Communication Network Architecture ：
– Material transmission network：Material network or Nordic
Network
– Integrated Computer Network：
• Functional levels：
– Postal communications network consists of a physical network,
operational norms and operation control system.
• Physical network is the material basis for the production
operation.
• operational norms is the norms of Production Operation.
• Operation Control System, the implementation of Operation
Monitoring and control to ensure reliable operation of the
whole network to ensure smooth production Post.
Material transmission network
• Network consists
– Postal material transmission is a network system for mails transfer
and material logistics under the supervision and control of control
system in accordance with operational norms organized by the
postal business, mailing office, reach facilities, mail processing
center and Postman (including Mail Tools) according to certain
principles and modalities. Network organization mode
– Postal district center office system
– Postal Communication Network sketch map
• Postal Material transmission network layers and types
– layers：National Route (backbone) Network，Provincial
Network，Postal district Material transmission network
– Types:（In accordance with the transmission speed ）：Courier
Network，General Parts Network
Post integrated computer network
• Consists of
– Physical network
– Software systems
• Physical Structure
– Backbone
– Network within the province
– local area network
• Software systems
– For the Completion of the information collection, processing,
application, storage capabilities.
Post integrated computer network↓
Material network: Urban and rural
coverage
Information network：Security and
convenient
THAT’S ALL!
THANK YOU!!