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SIP, SS7 and Gateways: A Transaction View of Next-Gen Operations 2005-2010
a market research report
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Migrating from today’s advanced intelligent network applications and services to next-gen services presents carriers with real challenges. To get new service revenue rolling in, carriers must integrate third-party content and applications on a wide range of new network elements-even as they keep current services in place. Deploying gateways or bridges between current operations and next-gen network elements is the answer, but that will require signaling handoffs between current SCPs and a new generation of network elements including feature servers, application servers, session border controllers, and other softswitches.
What sort of SS7-to-IP transaction loads should carriers expect? The current revenue-generating applications and services must be accessible to both legacy and to next-gen elements, but what impact will SIP signaling transactions have on SS7?
As the global telecom industry moves toward this hybrid infrastructure, INSIGHT presents a model for understanding SS7 and VoIP transaction loads, identifies the revenue-generating applications, and assesses the impact that SIP will have on SS7 gateways and SCPs.
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Report Excerpt
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1.1 Gateways, Media Servers, and Border Controllers
Network and service interoperability is a fundamental business requirement for
all network operators’ and service providers’ services. Even as the operators look forward toward a next generation network (NGN) that will make extensive use of optical transport and IP protocols to lower operational costs while greatly improving their service delivery and creation capabilities, the fact of the matter is that the current public switched telephone network (PSTN) will be around for many years to come. Service providers thus will have to ensure that multiple, different signaling protocols (e.g., IP, SS#7, ATM, CDMA, GSM), different services (e.g., voice, data, and media streaming), and different connections (e.g., dedicated, dial-up, wireless, DSL, and cable modems) can be accommodated within their own networks for many years to come. Moreover, they must also provide end-to-end, high-quality services in conjunction with other service providers and network operators with whom they interconnect.
In this context, the gateways, session border controllers, and media servers become all-important aspects of maintaining service continuity—and their associated revenue streams—as network operators and service providers migrate to IP. Gateways operate to serve a specific network or protocol interworking requirement. They translate between two or more distinct protocols. Over time, gateways will assume more intelligent processing functionality that may result in a value-added application, such as information-based routing being deployed on a gateway and its media server.
The IETF defines the media gateway as a “network element (NE) that provides conversion between telephone circuits and data packets carried over the Internet
and over other IP networks.”
The various types of gateways, media servers, and other NGN components analyzed in this study are defined in Table I-1.
Table I-1 - Gateway Definitions
|
Type |
Description |
|
Media Gateway |
Provides switching and
conversion of voice media paths between the PSTN and NGN/IP networks.
Can be configured to provide intermachine trunk management (a.k.a.,
off-loading/ grooming). |
|
Signaling Gateway |
Used to interconnect
different signaling networks, such as SCTP/IP-based signaling networks
and SS#7 networks. The SGW performs signaling conversion both ways at
the transport level between the SS#7 based transport of signaling and IP
based transport of signaling, i.e., between Sigtran SCTP/IP and SS#7 MTP.
The SGW does not interpret application layer (e.g., BICC, ISUP)
messages. |
|
CO Trunk Gateway |
Offloads and diverts
signaling traffic from Class 5/4 switches for Internet connections. |
|
Enterprise Gateway |
Devices act as
gateways for SIP-based messages between the enterprise network and the
NGN and often have the capability of adding security measures such as
encryption and integrity protection to the IP-bound traffic, as well as
provide interoperability between proprietary protocols used in PBXs,
etc., with SS#7 and IP. |
|
SIP Gateway |
Connects to other SIP
gateways of SIP connectors to provide SIP interoperability. |
|
Session Boarder
Controller |
Provides overall
control of the boundary between different service provider networks,
providing signaling protocol inter-working between the SIP-based IMS
network and other service provider networks, controlling the transport
boundary between service provider networks. |
|
Enhanced Services
Gateway |
Converts one or more
protocols between enhanced services platforms: ISDN PRI/SS#7, ISDN
PRI/IP. |
|
Wireless Gateway |
Provides interworking
between the digital wireless networks including GSM and PCS in between
GSM MAP and SS#7, on a country-by-country basis. |
|
Hybrid Fiber Coax
Gateway |
Provides an interface
between the PSTN and Packet Cable VoIP-based services offered by the
CATV operators. |
|
Least Cost Routing
Gateway |
Provides conversion
for international callback services between countries or locations
requiring gateways. |
|
Internet Telephony
Gateway |
Provides conversion
from PSTN voice to IP voice-over-packet backbone transports. Does not
provide switching in manner as media gateway or softswitch. |
|
GR-303 Gateway |
Provides interworking
for DSLAMs on local copper loops to access either the PSTN or the IP
network over an ATM or IP interface using GR-303 specifications. Non-US
access is referred as V.5.2, for which the same technology is
transferred. |
|
Media Server |
Provides
announcements, call progress tones, messaging capabilities in the NGN
environment and interconnects with softswitch or media gateway. |
It is important to realize that intelligent network (IN) applications long
associated with the PSTN, such as pre paid and toll-free calling, must coexist with IP/SIP solutions for a very long time. To convert IN to IP/SIP would involve a total rewrite or replacement of all existing subscriber revenue-generating applications—and thereis no protocol conversion technique available today (and none visible in the future)
that will provide a complete service translation between all the features used by IN applications and all the features used by IP. It is the gateways, session border controllers, and other NGN components that will provide this interoperability in the years ahead.
The companies that provide the telecommunications industry with its voice and
data networking equipment are beginning to react to the increasing market
opportunities surrounding the migration from legacy IN to NGN products and
services—but how they are reacting and the types of solutions being offered are
typically conditioned by where the vendor strength resides: in the core, the edge,or the premise. Regardless of whether the vendor comes from traditional telecom
or from the data networking, however, what has created substantial buzz is the
emerging IMS ........
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Market Segmentation
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Worldwide - By Geography
N. America
Europe/Mid East / Africa
Asia Pacific
Central America/Latin America
Gateway Forecast - by Geography
Unit Shipments
Revenue
Pricing
Media Server Shipments and Revenue Forecast
- By Geography
Session Border Controller- by
Geography
Units Shipped
Revenue
SIP Gateway-
by Geography
Units Shipped
Revenue
Enterprise Gateway-
by Geography
Units Shipped
Revenue
Enhanced Services Gateway-
by Geography
Units Shipped
Revenue
Wireless Gateway-
by Geography
Units Shipped
Revenue
Internet Telephony Gateway-
by Geography
Units Shipped
Revenue
Media Gateway-
by Geography
Units Shipped
Revenue
HFC Gateway-
by Geography
Units Shipped
Revenue
Least Cost Routing Gateway-
by Geography
Units Shipped
Revenue
CO Switch Gateway
- by Geography
Units Shipped
Revenue
GR-303 Gateway-
by Geography
Units Shipped
Revenue
Signaling Gateway-
by Geography
Units Shipped
Revenue
Media Server-
by Geography
Units Shipped
Revenue
Wireline, Wireless, VoIP Signaling Transaction Volume
US Wireline Segment Size and SS#7 Transaction Growth
US Wireless Segment Size and SS#7 Transaction Growth
VoIP Segment Size and SIP Invite Transaction Growth
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Table of Contents
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CHAPTER I
EXECUTIVE SUMMARY
1.1
Gateways, Media Services, and Border Controllers
1.2
Market Opportunity Forecast
CHAPTER II
MARKETS
2.1
Definitions
2.1.1
What’s At Stake?
2.1.2
The Core
2.1.3
The Edge
2.1.3.1
The Premise
2.2 Why Gateways?
2.3
Gateway Customers
2.3.1
Interexchange Carriers (IXCs)
2.3.2
Incumbent Local Exchange Carriers (ILECs)
2.3.3
Independent Operating Companies (IOCs)
2.3.4
Competitive Local Exchange Carriers (CLECs)
2.3.5
Competitive Access Providers (CAPs)
2.3.6
Cable TV (CATV) Operators
2.3.7
Internet Service Providers (ISPs)
2.3.8
Wireless Providers
2.3.9
Utility Companies
2.3.10
Educational and Governmental Agencies
2.3.11
Private Enterprise Networks
2.4
Signaling Transaction Services
2.4.1
Signaling Customers
2.4.1.1
Interexchange Carriers (IXCs)
2.4.1.2
Incumbent Local Exchange Carriers (ILECs)
2.4.1.3
Independent Operating Companies (IOCs)
2.4.1.4
Cable TV (CATV) Operators
2.4.1.5
Wireless Providers
2.4.1.6
Service Bureaus
2.4.1.7
Private Enterprise Networks
2.5
Next Generation Services
2.5.1
Toll-Free Number Translation
2.5.2
Fixed-Mobile Voice
2.5.3
Network Peering
2.5.4
Take-Back and Transfer
2.5.5
IP Centrex Features
2.5.6
One-Plus Account Code
2.5.7
Voice VPN
2.5.8 IP PBX
CHAPTER III
PROTOCOLS AND GATEWAYS
3.1
The Market for Gateways and Signaling Services
3.2
Trends Impacting Gateway Markets
3.3
Protocols
3.3.1
Signaling System 7 (SS#7)
3.3.2
IP Suite
3.3.3
H.323 Suite
3.3.4
Session Initiation Protocol (SIP)
3.3.5
SIP for Telephony (SIP-T)
3.3.6
MGCP/Megaco H.248
3.3.7
IP Multimedia Subsystem (IMS)
3.3.7.1
Home Subscriber Service
3.3.7.2
Service Capability Interaction Manager (SCIM)
3.3.7.3
Authentication, Accounting and Authorization (AAA)
3.4
Application Development Protocols
3.5
Gateways
3.5.1
SIP Gateway
3.5.2
Session Border Controller
3.5.3
Enterprise Gateway
3.5.4
Enhanced Services Gateway
3.5.5
Wireless Gateway
3.5.6
Media Gateway
3.5.7
Signaling Gateway
3.5.8
Hybrid Fiber Cable Network Gateway
3.5.9
Least Cost Routing Gateway
3.5.10
CO Trunk Gateway
3.5.11
GR-303 Gateway
3.6
Media Servers
3.7
Signaling Networks
CHAPTER IV
VENDORS
4.1
Enterprise, Signaling and Media Gateway Vendors
4.1.1
Cisco
4.1.2
Siemens
4.1.3
Ericsson, Inc.
4.1.4
Lucent
4.1.5
Nortel Networks
4.1.6
Nuera Communications, Inc.
4.1.7
Sonus Networks
4.1.8
Motorola
4.1.9
SS8 Networks
4.1.10
Convergent Networks
4.2
Voice over GR-303 Gateway Vendors
4.2.1
CopperCom
4.2.2
ComMATCH
4.3
Application and Media Server Vendors
4.3.1
Alcatel
4.3.2
AudioCodes
4.3.3
BroadSoft, Inc.
4.3.4
Cisco Systems
4.3.5
NetCentrex
4.3.6
Convedia
4.3.7
Huawei Technologies
4.3.8
IP Unity
4.3.9
Persona
4.3.10
Lucent
4.3.11
Microsoft Corporation
4.3.12
Sylantro Systems Corp.
4.4
Session Border Controllers and SIP Gateways
4.4.1
Acme Packet
4.4.2
Netrake
4.4.3
Nextone
4.4.4
Personeta
4.4.5
Ubiquity
CHAPTER V
MARKET FORECASTS
5.1
Overview
5.2 Methodology
5.3
Market Overview
5.3.1
Session Border Controller
5.3.2
SIP Gateway
5.3.3
Enterprise Gateway
5.3.4
Enhanced Services Gateway
5.3.5
Wireless Gateway
5.3.6
Internet Telephony Gateway
5.3.7
Media Gateway
5.3.8
Hybrid Fiber Cable Gateway
5.3.9
Least Cost Routing Gateway
5.3.10
CO Trunk Gateway
5.3.11
303 Access Gateways
5.3.12
Signaling Gateway
5.3.13
Media Servers
5.4
Transaction Services
5.4.1
Wireline
5.4.2
Wireless
5.4.3
Voice over IP
APPENDIX
GLOSSARY
TABLE OF FIGURES
CHAPTER I
I-1
Worldwide Gateway Revenue Forecast, 2005-2010
CHAPTER II
II-1
Converged NGN Architecture
II-2
Switching Methods and Protocol Types
CHAPTER III
III-1
SS#7 Protocol Stack
III-2
SIGTRAN Protocol Stack
III-3
H.323 Network Architecture
III-4
H.323 Call Flow
III-5
Basic Components of a SIP Network
III-6
SIP Call Flow in Proxy Mode
III-7
SIP Network Interconnection with the PSTN
III-8
MGCP Network Architecture
III-9
IMS Service Delivery Architecture
III-10
SIP Gateway
III-11
Session Border Controller
III-12
Enterprise Gateway
III-13
Enhanced Services Gateway
III-14
Wireless Gateway
III-15
Media Gateway
III-16
Signaling Gateway
III-17
Hybrid Fiber Cable Gateway
III-18
CO Gateway
III-19
303 Gateway
III-20
Media Server Configuration in the NGN
CHAPTER IV
IV-1
CopperCom’s IAD Architecture
CHAPTER V
V-1
Worldwide Session
Border Controller Unit Shipments Forecast
V-2
Worldwide Session Border Controller Revenue Forecast
V-3
Worldwide SIP
Gateway Unit Shipments Forecast
V-4
Worldwide SIP Gateway Revenue Forecast
V-5
Worldwide Enterprise Gateway Unit Shipments Forecast
V-6
Worldwide Enterprise Gateway Revenue Forecast
V-7
Worldwide Enhanced
Services Gateway Unit Shipments Forecast
V-8
Worldwide Enhanced Services Gateway Revenue Forecast
V-9
Worldwide Wireless
Gateway Unit Shipments Forecast
V-10
Worldwide Wireless Gateway Revenue Forecast
V-11
Worldwide Internet Telephony
Gateway Unit Shipments Forecast
V-12
Worldwide Internet Telephony Gateway Revenue Forecast
V-13
Worldwide Media Gateway Unit
Shipments Forecast
V-14
Worldwide Media Gateway Revenue Forecast
V-15
Worldwide HFC Gateway Unit Shipments Forecast
V-16
Worldwide HFC Gateway Revenue
Forecast
V-17 Worldwide Least Cost Routing Gateway Unit Shipments Forecast
V-18
Worldwide Least Cost Routing
Gateway Revenue Forecast
V-19
Worldwide CO Switch Gateway Unit Shipments Forecast
V-20
Worldwide CO Switch Gateway
Revenue Forecast
V-21
Worldwide GR-303 Gateway Unit Shipments Forecast
V-22
Worldwide GR-303 Gateway Revenue Forecast
V-23
Worldwide Signaling Gateway Unit Shipments Forecast
V-24
Worldwide Signaling Gateway
Revenue Forecast
V-25
Worldwide Media Server Unit Shipments Forecast
V-26
Worldwide Media Server Revenue Forecast
TABLE OF TABLES
CHAPTER I
I-1
Gateway Definitions
CHAPTER II
II-1
Gateway Definitions
II-2
TDM & SIP Call Routing Functions
II-3
VoIP Application Examples
II-4
Network Provider VoIP Offerings
II-5
Gateway Timeline
II-6
ILEC Enhanced Services Revenues
II-7
Signaling Transaction Types
CHAPTER III
III-1
IP Applications
III-2
Key Operational Constraints: NGN, PSTN, and the Internet
III-3
Master/Slave and Peer: A Comparison for Gateway Solutions
III-4
IMS Deployment Status
III-5
Gateway Operational Environments
CHAPTER IV
IV-1
IP Application and Media Server Segmentation by Vendor & Applications Supported
IV-2
Representative IP Application and Media Server Type by Vendor
IV-3
Session Border and SIP Gateway Vendors
CHAPTER V
V-1
Equipment Interface Requirements
V-2
Potential NGN Applications
V-3
Gateway Share Installed Base (by Device Type)
V-4
Worldwide Gateway Unit Shipments Forecas
V-5
Worldwide Gateway Revenue Forecast
V-6
Worldwide Gateway Pricing Forecast
V-7
Worldwide Media Server Shipments and Revenue Forecast
V-8
Worldwide Session
Border Controller Unit Shipments Forecast
V-9
Worldwide Session Border Controller Revenue Forecast
V-10
Worldwide SIP Gateway Unit
Shipments Forecast
V-11
Worldwide SIP Gateway Revenue Forecast
V-12
Worldwide Enterprise Gateway Unit Shipments Forecast
V-13
Worldwide Enterprise Gateway
Revenue Forecast
V-14
Worldwide Enhanced Services Gateway Unit Shipments Forecast
V-15
Worldwide Enhanced Services
Gateway Revenue Forecast
V-16
Worldwide Wireless Gateway Unit Shipments Forecast
V-17
Worldwide Wireless Gateway
Revenue Forecast
V-18
Worldwide Internet Telephony Gateway Unit Shipments Forecast
V-19
Worldwide Internet Telephony
Gateway Revenue Forecast
V-20
Worldwide Media Gateway Unit Shipments Forecast
V-21
Worldwide Media Gateway Revenue
Forecast
V-22 Worldwide HFC
Gateway Unit Shipments Forecast
V-23
Worldwide HFC Gateway Revenue Forecast
V-24
Worldwide Least Cost Routing Gateway Unit Shipments Forecast
V-25
Worldwide Least Cost Routing
Gateway Revenue Forecast
V-26
Worldwide CO Switch Gateway Unit Shipments Forecast
V-27
Worldwide CO Switch Gateway
Revenue Forecast
V-28
Worldwide GR-303 Gateway Unit Shipments Forecast
V-29
Worldwide GR-303 Gateway Revenue Forecast
V-30
Worldwide Signaling Gateway Unit Shipments Forecast
V-31
Worldwide Signaling Gateway
Revenue Forecast
V-32 Worldwide Media Server Unit Shipments Forecast
V-33
Worldwide Media Server Revenue
Forecast
V-34 Wireline, Wireless, VoIP Signaling Transaction Volume
V-35
US Wireline Segment Size and SS#7 Transaction Growth
V-36
US Wireless Segment Size and SS#7 Transaction Growth
V-37
VoIP Segment Size and SIP Invite Transaction Growth
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