Download Evolving Networks

s
IP Telephony
Helmut Schink
[email protected]
+49 89 722 44523
Siemens AG
ICN M CS 21
81359 München
Hofmannstr. 51
ITU Workshop on IP Telephony, Geneva, June 2000
1
s
Content
1) Drivers
2) Principles
3) Application
4) Challenges
5) Standards
6) Current Product
7) Closing
ITU Workshop on IP Telephony, Geneva, June 2000
2
s
Driver for tomorrow’s communication
Bitrate growth in data networks is higher
Total average bitrate
106
Gbit/s
Telephone total
103
1
10-3
Internet
10-6
1985
1990
1995
2000
Source: ICN M CM, ITU, ISOC
2005
2010
2015
Year
2020
 The internet becomes a second universal network besides
the voice network.
ITU Workshop on IP Telephony, Geneva, June 2000
3
s
Driver for tomorrow’s communication
Voice stays the main revenue generator
Revenues*) in Billion DM
400
350
300
250
200
150
100
50
0
Voice over IP Market Share *)
406
334
10 %
29%
25%
244
20%
5%
0
1993
Voice
7%
1998
CATV
2003
Data & VAS
*) Revenue for Telecom Services in Western Europe
Source: ICN M CM
3%
< 1%
1998
2003
2005
*) VoIP global call minutes as percentage of
VoTDM global call minutes.
The Impact on Telco Services and
Revenues, OVUM Ltd. 1998
 Voice service is lucrative for voice and data network
providers
ITU Workshop on IP Telephony, Geneva, June 2000
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s
Driver for tomorrow’s communication
The competition will be decided on services and price
Revenues p. Y. (in Bill. ECU) *
100%
90
13%
110
180
17%
30%
80%
280
45%
60%
40%
87%
83%
70%
55%
1990
1995
2000
2005
20%
0
* Revenues in Europe
Source: ICN M CM
With New Services
 conquer new markets
 differentiate from competition
 generate additonal
revenues
Traditional Services
 offered by all providers
 increased price competition
Services are the key to voice/data
success. They ...
 save time and money
 increase convenience for the end user
 generate additional call minutes
 are directly marketable
 create direct revenues
 promote subscriber loyalty
 provide a competitive edge in
deregulated markets
 The key to voice/data success lies in advanced multimedia
services and applications
ITU Workshop on IP Telephony, Geneva, June 2000
5
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Operators’ Motivation to Deploy VoIP Services
Operators’ Rating of Drivers for Voice over IP
average of all surveyed operators
Offering new and advanced services
very important
1
2
3
4
not important
5
6
Cost savings through efficiency of unified network
Cost savings through more bandwidth efficiency
VoIP as an additional, low-cost service
Market pull from business customers
Avoidance of interconnection cost
Growing competitive pressure through VoIP
Market pull from residential customers
Offloading peak traffic from the trad. voice n/w
Improved customer retention (for ISPs only)
Charge usage-based instead of flat rate (for
ISPs only)
ITU Workshop on IP Telephony, Geneva, June 2000
Interview basis: 16
6
s
Expected GW Features
Which features do operators expect ?
(multiple votes per operator possible)
15 answers total
Connectivity
with PSTN
SS7
Single-stage-dialing
ISUP transparency
Automatic Fax handling
IP QoS features
Automatic Modem handling
Automatic DTMF handling
Availability 99.999%
Line Redundancy
PSTN fallback incorporate in VoIP equipment
IVR (interactive voice response)
CO environmental conditions
CO rack integration (size)
Speech recognition (-> prepaid account)
CO power supply
Additional voice compression standards
0
4
8
12
Number of votes
needed now
ITU Workshop on IP Telephony, Geneva, June 2000
needed in 2 years
7
s
Content
1) Drivers
2) Principles
3) Application
4) Challenges
5) Standards
6) Current Product
7) Closing
ITU Workshop on IP Telephony, Geneva, June 2000
8
s
Decentralized Services
Access isolated in each
Administrative Domain
Access open across Administrative Domains
IP Phone
Gwy.
IP TelephonyLocation
Services IPTEL
IP Network
Trust Center
Services
PSTN / IN
IN
Services
Gatekeeper- /
TelephonyDomain Location
Services TIPHON
Small Enterprise
Tel. & IP Services
e.g. Vocaltec
ITU Workshop on IP Telephony, Geneva, June 2000
Management
Services
SNMP...
Clearing House
Billing
Services
9
s
Content
1) Drivers
2) Principles
3) Application
4) Challenges
5) Standards
6) Current Product
7) Closing
ITU Workshop on IP Telephony, Geneva, June 2000
10
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Attraktive Internet Features
Subscriber Controlled Input via Internet (ISCI)
E-Mail Waiting Indication (EWI)
Call Waiting Internet Busy (CWIB)
Call Completion Internet Busy (CCIB)
Voice over Internet (VoI)
Improved Voice-over-Internet (IVoI)
ITU Workshop on IP Telephony, Geneva, June 2000
11
s
CCIB: Functional Principle
Internet
PSTN/ISDN
Switch
Core
InterNode
Forward
Set-up
VoIP call
IPOP
Server /
Router
Content
Provider
Modem /
VoIP Process
Switch
ITU Workshop on IP Telephony, Geneva, June 2000
12
s
WCC: Service
web
ISP
(User)
VoIP/CCIB
or
telephone
ISP
(Agent)
Web Call
Center
Webserver
(e.g. archive)
EWSD INTERNODE
switching system
• WCC contolls data- and voice- connection
ITU Workshop on IP Telephony, Geneva, June 2000
13
s
Content
1) Drivers
2) Principles
3) Application
4) Challenges
5) Standards
6) Current Product
7) Closing
ITU Workshop on IP Telephony, Geneva, June 2000
14
s
Gatekeeper Pricing Protocol: Overview
Gateway
Operator
A
1
ARQ
5 SETUP
Gateway
4
ACF
6
ARQ
7
ACF
Operator
B
IP Network
Gatekeeper
Gatekeeper
3
AuthRsp
2
AuthReq
Clearinghouse Service
ITU Workshop on IP Telephony, Geneva, June 2000
15
s
Management: Trust And Authentication Services
"Trust by Wire" to "Trust by Authentication"
• Trusted authorities must be deployed
e.g.: Trust centers issue security certificates / tokens
• Telco's are traditionally trusted
Operation of trust centers generates new income (Verisign..)
• None repudiation evidence gathering
Trust centers can verify, trace and store CLI information for
later proof.This is currently a problem in IP networks
• ...
ITU Workshop on IP Telephony, Geneva, June 2000
16
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Telephone User Habits / Paradigms:
Do users want anything but dial?
• Transparency for Today’s Devices Required?
e.g.: G.3 FAX, modem, look and feel, RJ11 plug
• Real-time Billing
e.g.: Coinboxes, Prepaid-Cards, and hotel billing
• Connection Setup Time
Is location finding fast enough?
• Call Blocking (Non Payment, 3rd Party ...)
What are the requirements that can not be handled?
• ...
ITU Workshop on IP Telephony, Geneva, June 2000
17
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Content
1) Drivers
2) Principles
3) Application
4) Challenges
5) Standards
6) Current Product
7) Closing
ITU Workshop on IP Telephony, Geneva, June 2000
18
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Standardization
International
Telecomm. Union
ITU-T SG 16 concentrates on Multimedia Terminals and
Security; develops IP Telephony Standard H.323; TIPHON
provides input for this group.
(www.itu.org)
IETF investigates interworking between Internet and Intelligent
Networks. TIPHON influences via member organizations.
(www.ietf.org)
Internet Engineering
Task Force
TIPHON
TIPHON/ETSI is globally accepted as leading body for internet
gateway standardization.
(www.etsi.org/tiphon)
ITU Workshop on IP Telephony, Geneva, June 2000
19
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Content
1) Drivers
2) Principles
3) Application
4) Challenges
5) Standards
6) Current Product
7) Closing
ITU Workshop on IP Telephony, Geneva, June 2000
20
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Siemens evolutionary strategy for carriers
From EWSD to SURPASS with an open architecture
• Voice Features
• Call Control
• Access
RAS
VoIP
EWSD
CO
Access
VoATM
SURPASS
hiG 1000
SURPASS
hiG 2000
SURPASS hiA
EWSD
proprietary i/fs
SURPASS hiQ
Siemens’ leverage: the large installed base and best in class voice features.
Market requires: Open interfaces and decoupling of control and transport.
ITU Workshop on IP Telephony, Geneva, June 2000
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SURPASS hiQ Open Platform with standard interfaces
Open API for
external applications
SURPASS hiQ
open platform
ITU Workshop on IP Telephony, Geneva, June 2000
Registration and
Routing Server
22
s
Multiservice Access – SURPASS hiA
SCP
LNP
INAP
IN
Call Feature Server,
Media Gateway Controller
Network
Servers
AAA Server, Reg. & Routing Server
Open API
SoHo residential
RAS
TDM
PSTN/ISDN
network
other carrier
VoIP
Switch
Switch
Switch
Edge
Router
VoATM
IP / ATM
backbone
Access
xDSL
Core Router
ATM, FR/LL
POTS/ISDN
subscriber
PBX
POTS/ISDN
subscriber
Gateway
SURPASS hiA
ITU Workshop on IP Telephony, Geneva, June 2000
SM/L Enterprise
23
s
Siemens Corporate GSM Solution
BSC
GSM Public Operator
Abis
OMC-B
BTS
MSC
BTS
MCU
Abis
WARP
Router
Pico BTS
Server
QoS LAN
WAN
Server
H.323 / GSM
e.g.
Voicemail,
Gatekeeper
PBX
Gateway
HLR
E+G If
MSC
Gateway
GPRS
Gateway
Corporate
IP network
H.323
Terminal
OAM
OAM
Gateway
SGSN
Internet
Firewall
PBX
Network
PSTN
ISDN
ISDN PRA
Directory
ITU Workshop on IP Telephony, Geneva, June 2000
24
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Content
1) Drivers
2) Principles
3) Application
4) Challenges
5) Standards
6) Current Product
7) Closing
ITU Workshop on IP Telephony, Geneva, June 2000
25
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Visions: Is IP switching the solution for voice?
A/D
PSTN
A/D
xDSL loop
Via cable
Trunks to
Internet
IPTel
Gwy
Trunks to
PSTN
IP
Router
Trunks to
SIP, H.323 net
Cable
Head
A/D
M
IP
Router
xDSL
A/D
M
Servers: RADIUS, SIP, H.323,
Media, policy
Modems
Analog loop
Clean IP Switch or
Gigabit Ethernet cluster
ITU Workshop on IP Telephony, Geneva, June 2000
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