Transcript Best Practices in Service Creation

Best Practices in
Service Creation
Ian Moraes, Ph.D.
Principal Engineer 2
Office of the CTO
IP Unity Glenayre
September 10-12, 2007 • Los Angeles Convention Center • Los Angeles, California
Overall Context
We can gain an insight on how to enhance
IMS service development and delivery by
exploring what is driving interest and
adoption of Web 2.0 services
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September 10-12, 2007 • Los Angeles Convention Center • Los Angeles, California
Outline
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Recap of Web 2.0
Recap of IMS Application Infrastructure
Apply Web 2.0 best practices to IMS
Summary
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September 10-12, 2007 • Los Angeles Convention Center • Los Angeles, California
Web 2.0
• Nebulous eclectic mix of technology & behavior
– Blogging, Syndication (RSS/Atom), Wikis, Web
Services (REST), Rich Internet Clients (Ajax, Flex)
– Sharing, Participatory, Engaged Users, Social
Software, Viral Marketing, Consumable, Distributable,
Agility, Openness
Apache
craigslist
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September 10-12, 2007 • Los Angeles Convention Center • Los Angeles, California
Web 2.0 Principles
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Architecture of participation
Data as the driving force
Network effects by default
The perpetual beta
Innovation in assembly
Leverage the power of “The Long Tail”
Software above the level of a single device
O’Reilly and Battelle,
2004, Wikipedia
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September 10-12, 2007 • Los Angeles Convention Center • Los Angeles, California
Traditional Telco vs. Web 2.0
• Traditional Telco
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Closed architecture
Focus on mass market
Advertise service
Silo-based apps
Reactive User
Longer Development
Designed Application
• Web 2.0
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Open architecture
The Long Tail
Viral marketing
Collaborative platform
Empower User
Perpetual Beta
Customizable
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IMS
• IMS is a technology framework
– Layered unified IP–based architecture that supports a
plethora of converged voice, video and data services to
any device on a broad set of networks
– Fixed/mobile network convergence, user mobility,
access-agnostic applications, shared user profile
• Two key catalysts for deploying IMS
– Provide new applications that increase ARPU
– Enable faster deployment of new services
Heavy Reading, 2006
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September 10-12, 2007 • Los Angeles Convention Center • Los Angeles, California
IMS Architecture
IP Multimedia Networks
CS Network
Mb
Mb
CS
CS
Legacy mobile
signalling Networks
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BGC
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Mk
IMMGCF
MGW Mn
MRFP
MRFC
Mp
Mb
Mg
Mi
Mb
ISC
Cx
Sh
C, D,
Gc, Gr
Cx
HSS
S-CSCF
Mr
M
b
Mb
BGCF
AS
Mm
Mk
Mw
Mj
SIP AS
I-CSCF
Dx
• IMS
partitioning
of functions
• Standard
interfaces
for profile,
charging,
and control
• AS can be
purposebuilt or
SDP-based
SLF
Mw
P-CSCF
Gm
UE
Ut
IMS Subsystem
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September 10-12, 2007 • Los Angeles Convention Center • Los Angeles, California
Think like a Web 2.0 Developer!
• Broaden developer base
– Leverage web talent (Professional developers can use standard
web development tools such as Java, C#, XML)
– Technically capable users can use web tools to create or customize
services
• Use tools that promote rapid development of new services
– Tools such as J2EE (JSP, Servlets), VoiceXML, XML and Javascript
have more inherent rapid service velocity
– Rapid experimentation of new services
• Adopt shorter development cycles
– Lightweight programming model, agile development
– IMS standardized interfaces (Ro/Rf, ISC, Sh) and function
partitioning helps reduce integration, test and deployment
– Offer beta versions to get early user feedback
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September 10-12, 2007 • Los Angeles Convention Center • Los Angeles, California
Empower the User
• Think of an “active” user (not a passive one)
– User contributes to service
• Software gets better each time it is used
– Users can be co-designers of application
• Users want services their way
– Personalization (look and feel but also functions)
– Consistent preferences, data and configuration irrespective of
access method
– Create a simplified and easy to use experience
• Leverage web usability experience
• Monitor domain-specific trends
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September 10-12, 2007 • Los Angeles Convention Center • Los Angeles, California
Cooperate with Others
• Share Data Among Applications
– Multiple applications share converged service profile (HSS)
– AS can access and support GUP Server
• Build to Work with Deployed Components
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Interface with Charging (OCF/CDF) and Profile (HSS)
Leverage deployed Media Resource Function (MRF)
Participate in industry interoperability events
Comply with industry standard specifications
• Avoid Silo-based Applications
– Important to avoid replicating silo-based applications approach on
a single Application Server
– Current AS platform can support multiple applications
– Support bundling different types of services
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September 10-12, 2007 • Los Angeles Convention Center • Los Angeles, California
Don’t Build from Scratch
• Facilitate development of converged services
– New services could be created by aggregating individual services
(mashups) on different application servers using SCIM
– Expose application interfaces to facilitate access to application
specific data and functions
• Promote low-barrier computing and integration
– Modularize monolithic services into byte-sized reusable functions
– Enable easy access to operator functions (presence, location,
subscriber data)
– Nurture ecosystem for third party developers
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September 10-12, 2007 • Los Angeles Convention Center • Los Angeles, California
Enables Servicing of Niche Markets
• Easier to develop niche services in IMS
– The Long Tail
– IMS services framework encourages niche application
developers to use its abstracted network functions and standard
technologies to create enhanced services
– Use of SDP (with built-in ISC, Ro/Rf, and Sh interfaces) also
facilitates development of niche market services
• Enable easier sharing of promotions and offers
– Support options for Viral Marketing. For example, use the
messaging mailbox to support viral marketing
– Integration with social networking
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September 10-12, 2007 • Los Angeles Convention Center • Los Angeles, California
Broaden User Access
• Enhance server-side support for access methods
– Ensure applications are designed to support multiple access
methods
– Expose interfaces for access to subscriber data and status (XCAP)
• Develop applications for broad set of devices
– Use toolkits that facilitate broad device support to develop software
above the level of a single device (JSR 180, JSR 281, OMTP)
– Ensure consistency in user interfaces across different devices
(BREW, J2ME, WAP)
• Serve a global user base
– Design applications for i18n
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September 10-12, 2007 • Los Angeles Convention Center • Los Angeles, California
Transition to IMS Services
• Some operators prefer a phased IMS deployment
– Operators concerned with evolving specifications
– Reduces cost and risk
– Provides early insight on organization and processes required to
support new services
• Deploy next generation services platform
– Supports multiple applications on single platform
– Supports SIP using stack that can be extended to support ISC
– Enhanced services built to be access-agnostic (TDM, IP) & uses
web-based model (VoiceXML, J2EE, JSP)
– Abstract charging & profile interfaces can evolve to Ro/Rf & Sh/Dh
– Expose subscriber data & functions via HTTP/XML or web services
– Not coupled to a specific Media Server
– Can evolve to a SIP AS
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September 10-12, 2007 • Los Angeles Convention Center • Los Angeles, California
Examples of Progress
• BT Web 21C SDK
– Set of developer tools (SOAP-based Web Services API) that allow
application developers to make calls, send messages, receive
messages, manage conference calls, get location, and manage
contacts
• ExitGames and IP Unity Glenayre
– Leveraged MRF and SIP Application Server to add in-game voice
conversation (aka Trash Talk) features to the multi player networked
games of Exit Games
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September 10-12, 2007 • Los Angeles Convention Center • Los Angeles, California
Summary
• Analyze and synthesize Web 2.0 best practices
and apply them selectively to IMS service
development and delivery
• Not sufficient to merely replicate the Web 2.0
experience for IMS. IMS provides opportunity
to extend the Web 2.0 experience by
leveraging telco assets
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