converged services
DESCRIPTION
Converged Services. Igor Faynberg ([email protected]) Hui-Lan Lu ([email protected]) Bell Labs, Lucent Technologies Workshop on IP-Networking and MEDIACOM 2004, Geneva. Outline. What do we mean by convergence? Adjusting the PSTN to the Internet - PowerPoint PPT PresentationTRANSCRIPT
Slide 1, Faynberg & Lu SG 13 Workshop
Converged Services
Igor Faynberg ([email protected])
Hui-Lan Lu ([email protected])
Bell Labs, Lucent Technologies
Workshop on IP-Networking and MEDIACOM 2004, Geneva
Slide 2, Faynberg & Lu SG 13 Workshop
Outline
What do we mean by convergence? Adjusting the PSTN to the Internet
– Access to the Internet over the PSTN lines
– Internet off-load Adjusting the Internet to the PSTN
– IP telephony
– PINT
– SPIRITS
– Unified Messaging
– Voice Access to the Web
– Porting of PSTN intelligence into the IP telephony world (SIN)
– VPN Conclusion
Slide 3, Faynberg & Lu SG 13 Workshop
Three Aspects of Convergence
1) Interworking of “traditional” PSTN with the IP infrastructure to support voice over IP
2) Interworking of PSTN with the IP infrastructure to deliver IP-based service control for “traditional” PSTN calls (i.e., IP Telephony without voice over IP)
3) Interworking of PSTN with the IP infrastructure to provide remote access to IP networks via PSTN lines
Slide 4, Faynberg & Lu SG 13 Workshop
Adjusting the PSTN to the Internet
(PSTN access to IP networks)
Exploiting the bandwidth that can be supported by two-wire telephone access lines
+ Pulse Code Modulation (PCM) modem
+ Digital Subscriber’s Line (DSL) Offloading Internet traffic from the PSTN
Slide 5, Faynberg & Lu SG 13 Workshop
PSTNInternet
User IngressSwitch
SS7 Network
EgressSwitch
PSTN Congestion due to Internet Traffic
Remote Access Server
congestionInternet
ISP
Slide 6, Faynberg & Lu SG 13 Workshop
PSTNInternet
User
IngressSwitch
SS7 Network
EgressSwitch
An Internet Offload Solution
Remote Access Server
Softswitch
Internet ISP
Slide 7, Faynberg & Lu SG 13 Workshop
Adjusting the Internet to the PSTN (two aspects)
1) Support of the IP telephony requirements:1) Support of the IP telephony requirements: A new IP endpoint--IP telephony gateway--is required to
interconnect the Internet and the PSTN QoS must be enforced The IP and PSTN naming and addressing schemes must
interwork
2) The Internet-based support of the PSTN services requirement:2) The Internet-based support of the PSTN services requirement: Keep the intelligence at the edges! (Or, at least, share it with the
edges)
Slide 8, Faynberg & Lu SG 13 Workshop
PC-to-PC (1)
IP Network
NetworkAccess Server
PSTN
dialup access
PSTN as an access vehiclePSTN as an access vehicle
Slide 9, Faynberg & Lu SG 13 Workshop
PC-to-PC (2)
Enterprise A
Gateway Gateway
PSTN
Enterprise B
IP PBX IP PBX
PSTN as the backbone transportPSTN as the backbone transport
Slide 10, Faynberg & Lu SG 13 Workshop
Phone-to-PC or vice versa
Gateway
IP Network
PSTN
Slide 11, Faynberg & Lu SG 13 Workshop
Phone-to-phone
Enterprise
Gateway Gateway
IP Network PSTN
Home
Gateway
IP trunkingIP trunking
Slide 12, Faynberg & Lu SG 13 Workshop
Why IP telephony?
Toll bypass avoids long-distance call charges. One type of networks for both voice and data simplifies network
operation, administration, and management. Easy integration with other IP applications promises richer than
ever telephony services.
Slide 13, Faynberg & Lu SG 13 Workshop
Converged IP Telephony Architecture
SIPUserAgent
H.323Terminal
MediaGateway
Soft Switch
Gatekeeper Cloud SIP Server Cloud
IP Network
H.323Terminal
voice
voice
H.248
SS7
SIP/H.323
SIP UserAgent
IVRSystem
Public SwitchedTelephone Network
SCP
Slide 14, Faynberg & Lu SG 13 Workshop
Internet Enhancing PSTN Call ControlInternet Enhancing PSTN Call Control
Internet PINTGateway
PINTClient
SIP
Requests
Request to call Request to fax
Request to hear content Future: Request to Conference
PSTN/Internet Interworking (PINT)
PSTN SCP
Slide 15, Faynberg & Lu SG 13 Workshop
• Multimedia conferencing• Free calls (paid by advertisers)
– with the profiling feature• Speed Call list provisioning• Service Subscription• Follow-me service provisioning• Access to communications bills• Account information changes• VPN Provisioning
PINT has successfully concluded, but …
There are potential services for the future
Slide 16, Faynberg & Lu SG 13 Workshop
• Internet Call Waiting• Internet Caller ID
Utilizing the Internet for PSTN Service NotificationUtilizing the Internet for PSTN Service Notification
• Voice Mail arrival• Phone Off-hook detection
Internet PSTNSPIRITSGateway
SPIRITSServer
SCP
Requests & Notifications
Services in the PSTN/IN Requesting InTernet Services (SPIRITS)
Slide 17, Faynberg & Lu SG 13 Workshop
Servicecontrol
SwitchIP Network
PSTN
TelephonyGateway
SPIRITSClient
TelephonyGatewaySPIRITSGateway
TelephonyGatewayPINTServer
TelephonyGatewaySPIRITSServer Telephony
GatewayPINTClient
C
AB
Joint PINT/SPIRITS Architecture
Slide 18, Faynberg & Lu SG 13 Workshop
SPIRITS Status
1) The Implementation RFC (informational) RFC 2995 has been published
2) The Architectural RFC candidate has undergone WG last call
3) The Requirements RFC candidate is in the process of consensus building
4) The protocol work is under way
Slide 19, Faynberg & Lu SG 13 Workshop
Hello...
EBeep...Beep...
Fax Reader
Fax Sender
VoiceDirectory Visual
MailVoice Mail
Incoming MessageNotification
The ability to create, send and retrieve any type of message–anytime, anywhere– with any terminal...
Unified Messaging
Slide 20, Faynberg & Lu SG 13 Workshop
Residential•Stock quotes•Traffic conditions•Web-based Yellow/White pages•Local Events•Personalized Web page services
Voice Service Logic on Web ServersVoice Service Logic on Web Servers
HTTP
Voice Browser
Web / ApplicationServer
Corporate Data
PSTN
Switch
VoiceXML
Internet
Intranet
Voice Service Logic
Voice Access to the Web
Slide 21, Faynberg & Lu SG 13 Workshop
IP Network
PSTN
TelephonyGateway
Soft Switch
Service Control Point
SwitchIntelligent Peripheral
SIPSIPINAPINAP
SIP/INAP Interworking (SIN)[IETF Design Team]
Slide 22, Faynberg & Lu SG 13 Workshop
EnterpriseIP
Network IslandInternet
EnterpriseIP
Network Island
PSTN
Access Server
Tunnel Gateway
Tunnel Gateway
Tunnel Gateway
Virtual Private Network
Slide 23, Faynberg & Lu SG 13 Workshop
Conclusion
Regardless of the economical success of the IP telephony, there is room for integration of the traditional telephony and Internet
We consider convergence to be co-existence and symbiosis of the evolving PSTN and Internet (not the consumption of one by another); this symbiosis is manifested in integration
Integration of pure IP telephony with the PSTN has been worked in the IETF enum and megaco WGs together with ITU-T SG 2 and SG 16, respectively.
Intelligent Network is a natural PSTN platform to support such integration; ITU-T SG 11 and IETF (pint, spirits) have had a productive cooperative effort to this end.
The emphasis of the industry now is on enhanced services rather than “pipes”; services are key differentiators
RECOMMENDATION: the standards organizations should concentrate on providing building blocks for developing services in converged networks