1. Kommunikatsiooniteenuste arendus IRT0080
Loeng 1 Avo Ots telekommunikatsiooni õppetool,
TTÜ raadio- ja sidetehnika inst.

2. Tehnoloogiad TEENUSED Võrgutehnoloogia: kanalitehnoloogia
võrgusõlme tehnoloogia
TEENUSED
RIISTVARA & TARKVARA

3. UNI UNI Application Layer CPE CPE NNI NNI Service Layer Transmission
Network
CPE
CPE
NNI
NNI
Service
Layer
Switching
Network
Switching
Network
Switching
Network
Transmission
Layer
Transmission Network
Transmission Network
NNI
NNI
Physical
Layer
Physical Network
Physical Network
NNI
Physical Network
Physical
Interface
Logical
Interface
Service
Access
Point

4. Service Components Service Control Service Switching Service Access
Independent
Block
Service
Independent
Block
Service
Independent
Block
Service
Independent
Block
Service
Independent
Block
Service Logic
Service Logic
Service
Control
Service
Switching
Service Switch
Service Switch
Service Switch
Service Switch
Service
Access
Service
Access
Service
Access
Service
Access
Service
Access
Service
Access
Session Control
(Circuit
Switching control)
Call/
Session
Call/
Session
Call/
Session
Call/
Session
Call/
Session
Call/
Session
Call/
Session

5. Client Server Application Layer Server Server Server CPE IP CPE IP
ISP
Applications
ISP
Applications
ISP
Applications
CPE IP
CPE IP
Network
Layer
Packet
Switching Network
Packet
Switching Network IP
NNI
Transmission
Layer
Transmission
Network
Transmission
Network
NNI
Transmission
Network
Physical
Interface
Logical
Interface
Service
Access
Point

6. Telecom basic service/call control Off-line customer management
Transmission
Access Service
Terminal
Telecom basic service/call control
Off-line customer management
Extended call control and IN charging
Linear Service Architecture in Legacy Network: Static Services A
Terminal B
Portal
Transmission
Access
Session Service
Control Service
A Home Service
B Home Service
A User Service
Management
B User Service
Two-Dimension Service Architecture in NGN: Active Services

7. Profiilid terminal (laptop/PDA) application server profile server
AAA server
user profile: operator’s information about user
personal preferences:
for choice of
access etc.
network characteristics: bandwidth, cost, QoS, operator, ...
terminal capabilities: screen size, processing capacity, ...
access wizard: support for access selection
link manager: access discovery
access manager: access selection
access wizard agent
GUI
Mobile IP client
application
Mobile IP
Foreign
Agent
Home Agent

8. Võrgukomponendid ja haldus

9. Teenused võrgu kaudu

10. Lüüs/marsruuter G R

11. Kihid 7 6 5 4 3 2 1 Füüsiline (ühendus) Kanal Võrk Transport Seanss
Esitlus
Rakendus
Application
Presentation
Session
Network
Data link
Physical
SSL, WSP
RFC 791 IP, RFC 792 ICMP
TCP RFC 793, UDP RFC 768
WAE, HTTP, RFC821,822
ISO
IEEE a
Cat5, RS-232D

12. Võrgud communication networks switched networks broadcast networks
packet-switched networks
circuit-switched networks (e.g. telephone)
datagram networks (e.g. Internet)
virtual circuit- switched networks (e.g. ATM)

13. Layering

14. Ülemise ja alumised kihid
Lower three layers are hop-by-hop
Next two layers are end-to-end
Application
Transport
Network
Datalink
Physical
Physical medium

15. Andmeülekanne (loogiline)
application
transport
network
link
physical
data
ack

16. Andmeülekanne (füüsiline)
application
transport
network
link
physical
data

17. Sõnumiülekanne source destination application transport network link
datagram
application
transport
network
link
physical
source
destination M H t n l
message
segment
frame

18. Vahekihid Telnet FTP packet radio coaxial cable fiber optic HTTP HTTP

19. Funktsioonijaotus
The application knows the requirements best, place functionality as high in the layer as possible
If the application can implement a functionality correctly, implement it at a lower layer only as a performance enhancement
Think twice before implementing a functionality that you believe that is useful to an application at a lower layer

20. Töökindlus
router
sender
receiver L2 L2 L1 L1 L1
Solution 1: make each step reliable, and then concatenate them
Solution 2: end-to-end check and retry

21. Töökindluse tagamine The receiver has to do the check anyway!
Thus, full functionality can be entirely implemented at the upper layer; no need for reliability from lower layers
Is there any need to implement reliability at lower layers? L1 L2
sender
receiver

22. Teenuste keskkond

23. Voogude kulg Security Measures Signaling Networks Transport /
Signaling Path
RTP & Payload
Signaling
Networks
Transport /
Interconnect
Networks
Access Networks
(Wireline & Wireless)
Subnet 1
Subnet 2
Subnet 3
Subnet 4

24. Enterprise or Peer Point Network
Teenuste tagamine
Security Measures
Reroute Valid Traffic
Signaling
Networks
Signaling Path
Transport /
Interconnect
Networks
DOS
Attack
Access Networks
(Wireline & Wireless)
Enterprise or Peer Point Network

25. Kokkuühendamine SS7 Network Rec. Q.931 Rec. Q.700 series IETF RFCs
ATM Networks
IWF
PSTN/ISDN
Rec. Q.2931, PNNI
Frame Relay Networks
IP-based Networks
Rec. Y.1310
IETF RFCs
Rec. I.555
Rec. I.580
Rec. Q.931
ATM OSF & NM, M series Rec.
SNMP based
FR OSF & NM
SS7 Network
Rec. Q.700 series
Wireless access

26. Hajutatud töökeskkond
Filiaal
Firma
INTERNET
ISP
ISP
DNS
Kaugtöökohad
MAIL

27. Backbone network design layers

28. Routed Backbone

29. Collapsed backbone

30. Central Parking’s collapsed backbone

31. ATM Encapsulation

32. Võrkude ühiskasutus cdma2000 1x operator 1 Adhoc Network operator 2 IP
Ethernet
Adhoc
Network
cdma2000 1x
operator 1
operator 2
GPRS
Edge
WLAN
Web
Server IP

33. Võrguliikluse jaotus

34. Network Intelligence Servers Service Provider Servers
Võrgud ja terminaalid
Network Intelligence Servers
Terminals
Service Provider Servers
client application
network applications
applications
Libraries
Programming Libraries
network
capabilities
Client
resource
controllers
Network (PSTN, PLMN, IP) Resources and Special Resources

35. Protokollid http://www.private.org.il/tcpip_rl.html