Culture Clash— IMS vs. Peer-to-Peer TMIA 2006 Annual Meeting February 28, 2006
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Transcript of Culture Clash— IMS vs. Peer-to-Peer TMIA 2006 Annual Meeting February 28, 2006
Proprietary and Confidential
Culture Clash—IMS vs. Peer-to-Peer
TMIA 2006 Annual MeetingFebruary 28, 2006
James RaffertySr Product Manager
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Agenda
Background Directions in Voice over IP IMS Peer-to-Peer War, Compromise or other? What Does it Mean?
– Business Side– Technical Side
Summary
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Background
After some false starts, Voice over IP is hitting the mainstream
Data points: – Skype has 60 Million registered VoIP users
and was bought for $2.6B by E-Bay– Vonage has over 1 million paying customers– In the US, both incumbent Telcos and Cable
MSOs are starting their VoIP rollouts
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Directions in Voice over IP
SIP has become the protocol of choice, with just a few exceptions
Fixed price packages for unlimited calling and common services are generally available
Prices for “minutes” continue to go down Strong interest from carriers in rolling out
value-added services to augment vanilla phone revenues
Traditional voice carriers now have some very “untraditional” competition
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VoIP Architectural Models
VoIP began as “replacement” telephone service, with VoIP gateways bypassing Class 4 switches
This evolved to the Softswitch model, which decomposed operations into multiple network elements
SIP (Session Initiation Protocol) began as Peer-to-Peer, but has evolved to have more complexity
Skype borrowed peer-to-peer concepts from file sharing services using a proprietary protocol
3GPP standards group proposed the IP Multimedia Subsystem (IMS) for next gen IP wireless services– Now strong interest from wireline providers such as BT
Where is this all going?
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Two Prevailing Models
Two very different models are gaining the most traction today for VoIP– IMS (IP Multimedia Subsystem)– Peer-to-Peer
Let’s review the drivers for these two directions
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IMS
IMS is the latest attempt by the big telecom players to create a rich service creation environment
Previous efforts like the Advanced Intelligent Network (AIN) had limited success
So, what’s different about IMS? 1. Based on Voice over IP technology, which is replacing
legacy switched technology used in AIN
2. Based on SIP, which already has a growing community of application developers and equipment vendors
3. Strong interest from both wireless and wireline carriers
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PSTN
Top Level IMS Picture
Application Server
Service Layer
Control Layer
ConnectivityLayer
Media GW
CSCF (SIP)
MRFHSS
Other Elements
IP /MPLS
Wifi/WiMax
Application Server
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Rich Media Services in the IMS
SIPMSCML
RTP
SIP
SnowShore IP Media ServerMRF
IP MSC
MGW
SIP
SIPSIP w/ VoiceXMLSIP w/ MSCML
SIP
SIPVoiceXML
NFS
HTTP
FTP
NetworkStorage
Web Content
mp3QuickTime™
Text
MPEG-4
IMG
IMG
SIP Routing Cloud
3G
2.5G
PSTN
Cable
IPPhones
Video Ringback
VideoConferencing
Gaming
IPCall Center
Conferencing
Video MailAnnouncements
Pre-Paid Voice Mail
UnifiedMessaging
CMTS
S-CSCF/SCIM
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Peer-to-Peer
Heritage of Peer-to-Peer (PTP) quite different Massive Popularity of PTP file sharing services Founders of Skype took “lessons learned” from
Kazaa and created PTP VoIP– Featuring:
• Free on-net calling model• Viral marketing approach• APIs to encourage affiliates• Proprietary technology to get past NATs and firewalls• Built in buddy groups, instant messaging and presence • Low Charges for offnet PSTN connections
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Peer-to-Peer VoIP Example
Internet
Caller
Supernode
Caller Caller
Caller
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Other Peer-to-Peer Players
Yahoo has added voice to its Yahoo Messenger Google has created a chat service which includes
voice– Google also exploring other VoIP related services
Microsoft has voice add-ons for their IM service Lesser known companies such as Voiceglo also
have PTP VoIP services
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Current State of PTP VoIP
Skype/Ebay still by far the biggest player– Skype has a very aggressive affilitiate program
Other PTP services are mostly based on SIP PTP VoIP services are currently VoIP islands
– No interconnection except via PSTN– Early interest in VoIP peering to resolve
To date, Skype services are all “in the software” at the end point– For example, conferencing typically tops out at 5 users
Exploration of larger scale services which use servers – For example, conferencing vendor Vapps now
advertising 500 person conferences for Skype AND PSTN users
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War, Compromise or Other?
Make no mistake, IMS and PTP are VERY different technical and business models
Market forces are driving both models forward IMS is very comfortable model for traditional Telcos
and likely for MSOs too– Uses Internet technology in a “walled” garden– Lots of room for innovative services using server
based technogy PTP is more revolutionary approach
– Has much more in common with Instant Messaging– Driving end user costs to very low levels, but relies
on solid IP infrastructure– Most services are at the application level and in the
end point
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What Does it Mean?
Business Side IMS and PTP both need innovative applications
– IMS much more hospitable for application server and media server vendors
• Looks to be a good fit for offering services to enterprises
– Still, PTP needs innovation too, but fees may be at the “micro-cents” level
Telcos and MSOs control the pipes in US– Issues about charges for 3rd party applications to gain access
to the network– Concept of 2-tier Internet being tested
• Carriers would like to charge extra for better performance• Could result in degraded PTP voice quality
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What Does it Mean?
Technical Side SIP continues to be the big winner on the technical side IMS makes substantial use of SIP for various types of
service elements– Also makes limited use of Megaco/H.248
IMS also leverages lots of energy in areas such as XML-based service development
Skype has avoided SIP so far, but will likely use SIP peering mechnisms to talk with SIP VoIP networks in the future
In meantime, Skype developers write to a proprietary Skype API
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Summary
IMS and Peer-to-Peer are rival models for next gen VoIP Services
IMS has greater traction among established telco players
PTP has greater “buzz” and fast growing subscriber bases– Backed by the big Internet players such as
Google and Ebay
Both IMS and PTP need innovation at the Application level, creating business opportunities