Transcript SS7 & SIP

SIP & SS7 (SIP-02)
Monday - 09/10/07, 10:00-10:45am
SIP-SS7 Interworking
@ the Application Layer
Vince Lesch
VP of Product Marketing
Agenda
September 10-12, 2007 • Los Angeles Convention Center • Los Angeles, California
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•
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Network Evolution
Key Transitional Challenges
Seamless Connectivity
Service Deployment and Access
– SCIM
– IM-SSF
• NGN Control Layer
• The Build Out Steps
• Summary
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Network Evolution - Growing the NGN
PBX
September 10-12, 2007 • Los Angeles Convention Center • Los Angeles, California
SIP
PBX
IAD
VoIP
End-Point
VoIP
SIP
Services
Edge
Proxy
A/Abis
MG
RAN
SBC
A/Abis
RAN
MG
MSC
Server
VoIP
Edge
Proxy
• Cost Reduction at the Core through VoIP
SBC
• Expansion of VoIP to Enterprise & Residential
VoIP
• Introduction of services based on SIP application
servers
• VoIP Peering
• R4 MSC servers introduction
PSTN
Region
PSTN
Region
PSTN
Region
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Key Transitional Challenges
September 10-12, 2007 • Los Angeles Convention Center • Los Angeles, California
• Technical Challenges
– Mergers & acquisitions have resulted in operators supporting
several versions and variants of the same product & protocol
– Seamless service connectivity across hybrid networks
– Legacy system connectivity to newer systems
– Systems integration and multi-vendor interoperability
– Stability of standards, vendor implementation of standards
• Business Challenges
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–
–
–
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Investing in the future while supporting today’s users
Capping expenditures in the “pre-IMS” technology
Cost effectively running a hybrid network
Providing new services to subscribers on old & new networks
Making the business case for IMS work
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Seamless Connectivity
September 10-12, 2007 • Los Angeles Convention Center • Los Angeles, California
SIP
AS
Call
Server
BICC, SIP
Call
Server
SS7
ISUP
SS7
ISUP
LE
PSTN/
PSTN/
ISDN
ISDN
Media
Gateway
Media
Gateway
ATM, IP
backbone
Media
Gateway
Media
Gateway
LE
PSTN/
PSTN/
ISDN
ISDN
• TDM for access, IP at the core for transport
• Interworking between ISUP and SIP for call completion.
BICC (Q.1902) used in 3G R4 architectures is based on
ISUP which simplifies interworking
• IETF, ITU-T and 3GPP Standards for ISUP & SIP
Interworking: RFC 3372/3398, Q.1912.5, 29.163
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IMS Architecture for Svc Provisioning
September 10-12, 2007 • Los Angeles Convention Center • Los Angeles, California
AS
Source: TS 23.218 IP Multimedia (IM)
session handling; IM call model;
Stage 2
AS
SCIM
SIP
Application
SIPApplication
Server
Server
Sh
ISC
HSS
HSS
S-CSCF
S-CSCF
Cx
Si
ISC
OSA
service
OSAservice
capability
server
capabilityserver
(SCS)
(SCS)
OSA
OSA
application
application
server
server
OSA API
ISC
Mr
IM-SSF
IM-SSF
MAP
CAP
MRFC
MRFC
Camel
Service
CamelService
Environment
Environment
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Service Orchestration & Mediation
September 10-12, 2007 • Los Angeles Convention Center • Los Angeles, California
Service Orchestration & Mediation
IMS-to-IN (SIP-SS7)
Exposing legacy services into IMS
domain (Ex. LNP in IMS domain)
MM-IM
IN
CNAM
1188
AIN
AIN
Presence
Voice
VCC
AS
AIN
IN-to-IMS (SS7-SIP)
Access to next generation
applications (Ex. LHS & MHS)
IN-to-IN (SS7-SS7)
Mediates services implemented using
different technologies (Ex. CAMEL
Consolidation)
STP
Function
LNP
Virtual
SSP
Virtual
SIP UA
SCIMVirtual
Virtual
SCP
CSCF
Function
SIP AS
IMS-to-IMS (SIP-SIP)
SCIM functionality mediates SIP
services in the IMS World (FMC,
MM-IM & Presence)
SSP
MSC
MGCF
MGCF
Bridging IN/AIN & IMS Applications
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Service Orchestration & Mediation
September 10-12, 2007 • Los Angeles Convention Center • Los Angeles, California
Variations
• SS7 only
• SIP only
• SIP & SS7
Billing
Control
Vendor 1
MSC/SSP
Virtual
SCP
Vendor 2
MSC/SSP
PRBT
Interaction
Service Meditation (IM-SSF)
• Mediate between CAMEL and
SIP Service Clients/Server
nodes
• Mediate between SS7
variants
Subscriber
VPN/LNP
New Network Services
SoftSwitch/
CSCF
Expensive to add
multiple protocols
Virtual
SIP
AS
Mediation
Service Orchestration (SCIM)
• Interaction across multiple
CAMEL and IMS Application
Servers
Presence
SIP App
Server
Network AND market requirement to combine SCIM and IM-SSF
functionality into one product
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SIP Signaling Router = SIP STP
September 10-12, 2007 • Los Angeles Convention Center • Los Angeles, California
PBX
SIP
PBX
IAD
VoIP
End-Point
SIP AS
(B2BUA)
VoIP
Edge
Proxy
A/Abis
MG
RAN
SBC
A/Abis
RAN
MG
MSC
Server
VoIP
SIP STP
Edge
Proxy
• Cost Reduction at the Core through
VoIP
• Expansion of VoIP to Enterprise &
Residential
• Introduction of services based on SIP
application servers
• VoIP Peering
• R4 MSC servers introduction
• Scalable signaling infrastructure
SBC
VoIP
PSTN
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Current NGN Implementation
September 10-12, 2007 • Los Angeles Convention Center • Los Angeles, California
SIP
AS
SIP
AS
MSC
Servers
PSTN
GW
Softswitch
IP
PBX
- IP layer routers
- IP routing protocols
- IP QOS controls
SIP
End-Points
Distributed policies and information
Multimedia Servers
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NGN 2.0: Dedicated SSR Session Layer
September 10-12, 2007 • Los Angeles Convention Center • Los Angeles, California
SIP
AS
SIP
AS
MSC
Servers
PSTN
GW
IP
PBX
- IP layer routers
Routing
Session
Routing
- IP
routingSession
protocols
Engine
Engine
- IP QoS controls
Session Setup
URI Routing
Service Orchestration
IOT Point
SIP
End-Points
Softswitch
Multimedia Servers
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The Build Out Steps
September 10-12, 2007 • Los Angeles Convention Center • Los Angeles, California
CAMEL
INAP
Multimedia IM
SIP
AS
SIP
AS
IMS
Voice AS
Service Orchestration (SCIM) AND Mediation (IM-SSF)
SMSC
SIP Media Server
IMS Media Server
Softswitch
STP
Sigtran
ISUP/INAP
SSR
TDM
MSC
S-CSCF
P-CSCF
I-CSCF
Softswitch
Softswitch
Transit
MGC/
MGCF
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Summary
September 10-12, 2007 • Los Angeles Convention Center • Los Angeles, California
• Network evolution present operators with many challenges
– Network – operating a hybrid network for many, many years
– Services – consistency across networks and transparency to the customer
– Business – proving in the business case (leverage what you’ve got)
• Migrating at the signaling control layer … a logical choice
– Service mediation (IM-SSF) & interaction (SCIM) across pre-IMS & IMS domains
– SIP signaling & session control layer in the NGN brings benefits now
– Unified Signaling Control Plane: SS7 STP = SIP STP = IMS CSCF
• Transitional technologies will be key for the next 3 - ? years
• Minimize investment in “pre-IMS” technologies
• Service continuity across hybrid networks
• Leverage existing investment in key IN/AIN applications (e.g., number
portability) by making them available to both domains during transition to IMS
• A good transitional strategy is essential to making the IMS business
case work
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