Cisco cisco SS7 over IP strategy pdf

Presentation_ID

© 2001, Cisco Systems, Inc. All rights reserved.

1


Course Number
Presentation_ID

2


• Cisco Mobile Wireless Group (MWG):
Engineering and product management staff dedicated to mobile
wireless solutions
Located in San Jose, California, and RTP, North Carolina

• Global System Engineering and Consulting Engineering
teams focused on the needs of mobile operators
• Worldwide customer support and logistics
• Ecosystem partners; monitoring, applications,
integration, and support

© 2002, Cisco Systems, Inc. All rights reserved.

Cisco Confidential

3

IP RAN

HLR

MSC

Billing
V

SMSC

PSTN

IP Core

Mobile Core Network

SS7

Packet Gateway
Corporate
VPN

CMX

Public
WLAN

COE
SSG

Internet
CSG

ITP = Cisco IP Transfer Point
© 2002, Cisco Systems, Inc. All rights reserved.

Cisco Confidential

4


• Lower costs
Reduce capital expenditures and operating expenses

• High performance
Scalable link density, MSU/sec

• Carrier grade platform
High availability, redundancy, stability, investment protection

• Standards compliant
SS7 variants, IETF SIGTRAN, HSL

• Facilitate Data Services Revenue
© 2002, Cisco Systems, Inc. All rights reserved.

Cisco Confidential

5

Introduce a Supplemental SS7 Transport Plane
Classical SS7 Transport Network

SEP Site

SEP Site
STP
STP

STP
STP

MSC
SMSC

MNP

SCP

HLR
Next-Generation SS7 Transport
Network

Next-Gen (NG) Transport:
• TDM Edge – TDM Core
• TDM Edge – IP Core
• Mixed TDM/IP Edge – IP Core
• All IP

© 2002, Cisco Systems, Inc. All rights reserved.

MNP

Cisco Confidential

6


No Architecture Changes—Reduce CapEx
Classical SS7 Transport Network

SEP Site

SEP Site
STP
STP

STP
STP

MSC
SMSC

MNP

SCP

HLR
Next-Generation SS7 Transport

Network

NG Transport:
• TDM Edge – TDM Core
• TDM Edge – IP Core
• Mixed TDM/IP Edge – IP Core
• All IP
© 2002, Cisco Systems, Inc. All rights reserved.

MNP

HSL LINK
M3UA/SUA LINK

LSL TDM LINK
M2PA LINK
Cisco Confidential

7


Introduce IP in the Core—Begin Migration
Classical SS7 Transport Network

SEP Site

SEP Site
STP
STP

STP
STP

MSC
SMSC

MNP

SCP

HLR
Next-Generation SS7 Transport
Network

NG Transport:
• TDM Edge – TDM Core
• TDM Edge – IP Core
• Mixed TDM/IP Edge – IP Core
• All IP
© 2002, Cisco Systems, Inc. All rights reserved.

MNP

HSL LINK
M3UA/SUA LINK

LSL TDM LINK
M2PA LINK
Cisco Confidential

8


Move IP to the Edge—Reduce OpEx
Classical SS7 Transport Network

SEP Site

SEP Site
STP
STP

STP
STP

MSC
SMSC

MNP

SCP

HLR

MNP
Next-Generation SS7 Transport
Network

NG Transport:
• TDM Edge – TDM Core

• TDM Edge – IP Core (option 2)
• Mixed TDM/IP Edge – IP Core
• All IP
© 2002, Cisco Systems, Inc. All rights reserved.

HSL LINK
M3UA/SUA LINK

LSL TDM LINK
M2PA LINK
Cisco Confidential

9


IP-Enable HLR, SMSC, SCPs, Apps—Increase Data Revenue

Classical SS7 Transport Network

SEP Site

SEP Site
STP
STP

STP
STP

MSC
SMSC

MNP

SCP

HLR
Next-Generation SS7 Transport
Network

NG Transport:
• TDM Edge – TDM Core
• TDM Edge – IP Core
• Mixed TDM/IP Edge – IP Core
• All IP
© 2002, Cisco Systems, Inc. All rights reserved.

MNP
HSL LINK
M3UA/SUA LINK

LSL TDM LINK
M2PA LINK
Cisco Confidential

10


Next-Generation SS7 Network
IP-Enable All Service Endpoints—Complete Migration
MSC

SMSC

STP

M3UA
ITP

ITP

HLR

MSC

M2PA
M3UA
ITP

MSC

ITP

SMSC

MSO Central

MSO North

STP

MSO South

M2PA

SMSC

HLR

M3UA
ITP

ITP

SG South
HLR

HSL LINK
M3UA LINK

© 2002, Cisco Systems, Inc. All rights reserved.

TDM LINK
M2PA LINK
Cisco Confidential

11


SS7 Migration to IP

Course Number
Presentation_ID

12


IETF SIGTRAN Working Group

• Multivendor group that is designing SS7-over-IP
(SS7oIP) standards
• />• SCTP (RFC 2960), M2UA, M2PA, M3UA, SUA
– Cisco is an author on all of the above except SUA

© 2002, Cisco Systems, Inc. All rights reserved.

Cisco Confidential

13


STP Peer-to-Peer SS7 Offload (M2PA)
Protocol Architecture
MSC

SCCP

MTP1

GTT

MTP3
Link
Protocol

SS7
Appl

SCCP

GTT

MTP3
MTP2

SS7

IP

SS7

SS7
Appl

SMSC

ITP

ITP

M2PA

MTP2
SCTP
MTP1

IP

© 2002, Cisco Systems, Inc. All rights reserved.

MTP3

MTP3
Peer
Transport

M2PA
MTP2
SCTP
IP

Link

MTP2

Protocol

MTP1

Cisco Confidential

MTP1

14


Signaling Gateway Protocol Architecture
SUA SG
MAP

TCAP

SCCP

SCCP

MTP3

MTP3

MTP2

SEP
MAP IS-41 I T
S U
TCAP U P
SCCP P

TCAP

SUA

SUA
SCTP

MTP2

MTP1

MAP

N
I
F

GTT

MTP1

IP
Network

IP

IP

SS7

SCTP/IP

ITP

ASP
MAP IS-41 I T
S U
TCAP U P
SCCP P

GTT

SCCP
N
I
F

SCTP

MTP3

MTP3

MTP2

MTP2

SCTP

MTP1

MTP1

IP

M3UA

M3UA
IP
Network

SCTP
IP

M3UA SG
© 2002, Cisco Systems, Inc. All rights reserved.

Cisco Confidential

15


Cisco IP Transfer Point Protocol
Architecture
Cisco IOS IP Base Bundle
SCCP
GTT

SUA

MTP3 / MTP3b
M3UA
M2PA

SSCF-NNI
MTP2

SCTP

SCCOP
AAL5

MTP1

© 2002, Cisco Systems, Inc. All rights reserved.

IP

Cisco Confidential

16


Cisco IP Transfer Point
SIGTRAN Vendor Interoperability
• M2PA
Industry interoperability event completed with Alcatel, Radisys,
Openss7, Airslide and Catapult

• M3UA
Industry interoperability event completed with Ericsson, HP, Intellinet,
Radisys, Siemens and Trillium

• SUA

Industry interoperability event completed with Hughes Network
Systems, Performance Technologies, Radisys and Siemens

• Have completed interoperability testing with numerous industryleading partners – please contact Cisco ITP team for solution
details

© 2002, Cisco Systems, Inc. All rights reserved.

Cisco Confidential

17


Cisco SS7oIP
Elements
Ecosystem
Partners
Integrator Partners
Ecosystem Integrators

Ecosystem Network Monitoring Partners

EcosystemApplication
ApplicationPartners
Partners
Ecosystem

ITP Graphical Monitoring Tool (SGM)

SIGTRAN Signaling Gateway

SIGTRAN STP Offload

Leading IP Network Design/Products
© 2002, Cisco Systems, Inc. All rights reserved.

Cisco Confidential

18


Quality of Service

Course Number
Presentation_ID

19


Quality-of-Service (QoS) Overview
The goal in a QoS-enabled environment is to ensure predictable
delivery of specific traffic types, regardless of other traffic flowing
through the network at any given time.
QoS in Legacy SS7 Network:
• Priority levels determined by SS7 service endpoints
• During congestion, MSUs dropped based on 2-3 priority levels
• Links are added for additional bandwidth and redundancy
Opportunity to Improve QoS in SS7oIP Networks:
• Combination of traffic types are increasing as new services introduced
• IP network is QoS capable

• Transfer points should determine QoS
• Additional SCTP (logical links) do not provide additional bandwidth or
redundancy
© 2002, Cisco Systems, Inc. All rights reserved.

Cisco Confidential

20


Cisco IP Transfer Point QoS Implementation
QoS Architecture
The type-of-service (ToS) byte within the IP protocol represents the
precedence or priority of an IP message (packet). The Cisco IP Transfer
Point can establish ToS by any combination of the following MSU
characteristics:
• Input link set (ex: link set from SMSC)
• Service Identifier (ex: ISUP or SCCP)
• Destination Point Code (ex: MSU destined to SMSC)
• Global Title Address (ex: TT or MSIDN of SMSC)
• M3UA/SUA Routing Key

IP

IP Packet Header
TOS
(DSCP/ IPPrec)

Protocol
Type

Source
Address

Destination
Address

Src/Dest Port

Core Router
MSC
SS7/MTP

© 2002, Cisco Systems, Inc. All rights reserved.

SIGTRAN/IP

IP Core
Network

Cisco Confidential

21


Cisco IP Transfer Point QoS Implementation
Classification/Marking—Input Linkset

Link from MSC

T1 / E1
Link from HLR
T1 / E1

Ethernet
Interface

SCTP Links

Physical Facility

DSCP=49

SS7 Traffic from MSC

IP Prec=3

SS7 Traffic from SMS

IP Prec=5

SS7 Traffic from HLR

Link from SMSC

© 2002, Cisco Systems, Inc. All rights reserved.

Cisco Confidential

22

Cisco IP Transfer Point QoS Implementation
Classification/Marking—Service Indicator Classification

MSC

T1 / E1
MSC
T1 / E1

Ethernet
Interface

SCTP Links

Physical Facility

DSCP=49

ISUP Traffic with SIO=5

IP Prec=5

SCCP Traffic with SIO=3

HLR

© 2002, Cisco Systems, Inc. All rights reserved.

Cisco Confidential

23


Platform

Course Number
Presentation_ID

24


Cisco IP Transfer Point Platforms

HIGH-END PLATFORM

LOW-END PLATFORM

(Cisco 7507 and 7513)

(Cisco 2651)

Cisco IP Transfer Point is Cisco IOS® Software bundled on existing Cisco platforms
Dual processor
Single processor
Dual DC power

External dual DC power

Hot-swap line cards

No hot-swap capability

NEBS compliant

NEBS compliant

Any IP WAN media
Up to 720 SS7 links

Two 10/100 Ethernet ports and 1 network
module for other WAN media
4 SS7 links

SS7 interfaces: T1, E1, V.35, RS-449

SS7 interfaces: T1, E1, V.35, RS-449

© 2002, Cisco Systems, Inc. All rights reserved.

Cisco Confidential

25