Transcript 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
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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
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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
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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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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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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