1. SIP for Mobile Services
Arjun Roychowdhury
Hughes Software Systems

2. Agenda The Mobile Market 802.11 WLAN Push To Talk
Some Additional Notes
Conclusion

3. The Mobile Market
Validating the Need

4. Who needs Mobile SIP services ?
Strongest Business Case
Mobile Operators
Cost of deployment is low
Service deployment turn-around time is much less
New charging schemes easier to introduce (smile, CFOs)

6. Mobile Data - Revenue Growth

7. Mobile Data Overview

8. Mobile Data Overview (Source - ARC Group, www.arcgroup.com)
Global MMS Traffic By Region
APAC dominates Global MMS Market for next 4 years
Japan, South Korea
Europe witnesses MMS Boom in

9. Mobile Data Overview

10. 802.11 – making the world a smaller place

11. WLAN - 3G Interoperability
Also Note: Wi-Max makes a reality out of ‘Fixed Mobility’

12. Wi-Fi Enabled Cellular Handsets (Source - ON World Report on VoWLAN, Q3 2003)
Dual Mode Handset
Wi-Fi & Cellular
Catering to an ‘All - IP Network’
Pushed forward by Market Leaders - Motorola, Nokia, Broadcom, TI
Statistics
Globally 650k Handsets to be Shipped by 2007
Dual Mode Handsets constitute 50% of overall revenue by 2005
Dual Mode Handsets constitute 85% of overall revenue by 2007

13. Voice over WLAN (VoWLAN) (Source - ON World Report on VoWLAN, Q3 2003)

14. Wi-Fi Enabled Cellular Handsets - Latest Industry News
NTT-DoCoMo (9th Dec 2003,
DoCoMo develops prototype 3G/WLAN dual-mode phones
The hybrid handsets
targetted at corporate clients
can be used as regular 3G phones outside office
high-speed access to company servers in offices equipped with WLAN
WLAN service offers transmission speeds of around 11 megabits per second, which is 28 times faster than the DoCoMo’s 3G service

15. Wi-Fi Enabled Cellular Handsets – Latest Industry News
NTT-DoCoMo (9th Dec 2003,
DoCoMo aims to launch the commercial version of the hybrid handsets in the next business year starting in April in an effort to boost its 3G user base
DoCoMo's 3G users totalled 1.3 million as of the end of October, lagging behind rival KDDI Corp's 10.7 million

16. A Carrier’s perspective -why integrate:

17. Push – To - Talk
Here comes the Tide !

18. P2T - The not yet hindsight killer-app
Push To Talk (aka ‘Instant Voice Messaging’ aka ‘PoC’)
Service Providers in the Game
Nextel, Verizon, AT&T, etc.
OEMS in the scramble
Motorola, Qualcomm, Nokia, Ericsson, etc
Service Definition is simple – push and talk – walkie talkie mode
Service realization with SIP is the issue

19. PoC sample call flow – many questions
Is this a conference controller
Model ?
Is the latency acceptable for
PoC especially in a wireless
Network ?
What happens to the call
For burst talks ? Keep a call
Active all the time ? If so,
How does it affect billing ?

20. Its not just about ‘mimicking’ P2T using a regular Call
Billing and Resource
Allocation Implications
Src: Nokia

21. Where is P2T going ? The Good
At least everyone ‘wants’ to use ‘SIP’. P2T over IP is the industry trend
OMA is trying to define approaches
The Bad
No standard. ‘Session-less’ P2T does not fit into a SIP session model. ‘Session’ P2T is more like a regular call
OMA not yet mainstream
The Ugly
Everyone doing their own rendition of SIP++
The P2T world if full of patents, IPRs and like

22. Who is working on these issues ?
3GPP/2
OMA
Independent Vendors (due to a lack of standardization)
IETF SIP/SIPPING WG – not really, but should

23. Some Additional Notes

24. SIP and its competition – for mobile Space
Session control / Legacy voice services (NO Risk)
H.323 was never in. 3GPP selected SIP and sealed H.323’s fate for the wireless market
Instant Messaging/Presence (High Risk)
XMPP/JABBER/SIMPLE – battle rages on
SMS/EMS/MMS – already deployed
Proprietary formats abound and deployed
Wireless Village
OEM acceptance/SP assurance (getting better by the month)
Motorola, Nokia, Ericsson, Microsoft & others heavy on the SIP bandwagon – Service Providers encouraged to rollout services (if there are no SIP phones, whats the use of SIP serivices dilemna)

25. Architectural requirements
Server Side
Provides a combination of Centralized and Peer-Peer models for service realization
Integration with Web servers (via SIP servlets, SIP CGI etc) enable new ASP based service models
Client Side
Low footprint implementations ideal for Thin Client technology

26. SIP and Thin Clients..
Salient Features of SIP critical for succeeding in strict boundaries of hand held devices:
Simple protocol translates to simpler processing requirements
A typical UE side SIP Stack can be made to be less than 50k
Affinity to HTTP style makes it a natural for Web Based services
Distributed service architecture allows for complete isolation of service request (on UE) and execution (on IMS nodes)
j2ME is gaining lot of acceptance- when mature, backend services based on JAIN-SIP/JSLEE and SIP servelets will be key enablers of services
Symbian (EU), BREW (US) to watch for. Also Smartphone SDK
Presence SIMPLE/extensions

27. Conclusion SIP is the natural way for wireless services
adopted by 3GPP
existing 2/2.5G networks looking at SIP-enabling MSCs
Unified presence architecture in place
SIP is lightweight to provide locally hosted services in handsets
Wide adoption of SIP across Wireline and Wireless networks

28. Thankyou Arjun Roychowdhury <aroychow@hssworld.com>
Hughes Software Systems