PTT/PoCPTT/PoCPush to Talk over CellularPush to Talk over Cellular- Handset PerspectiveHandset Perspective
1 © NOKIA PoC general description.PPT / February 2004
Niraj GandhiProduct Marketing ManagerNokia Mobile PhonesCDMA BU
CDG Technology Forum – PTTJune 2004
2 © NOKIA PTT/CDG PTT Event / June 2004
Agenda• PTT Market landscape in CDMA
• Fragmentation• Interoperability effects
• PTT for handsets• Key Features• PTT Client• Specific Requirements• Integration Challenges
• Nokia’s CDMA PTT strategy
3 © NOKIA PTT/CDG PTT Event / June 2004
Current State of Affairs in CDMA
• High interest level in operators, end users as well as the media
• Current PTT market is fragmented with proprietary solutions
• Customized SIP and/or RTP based• Proprietary clients
• No interoperability between systems
• Limited handset availability• Hurts carriers• Hurts end users
• Some publicly announced launches in CDMA• Verizon• Sprint PCS• Alltel
• Operators who have launched are seeing some success
• Targeting consumer segment without interoperability is difficult
4 © NOKIA PTT/CDG PTT Event / June 2004
Example of Fragmentation in CDMA: MMS
Carrier D Carrier ECarrier CCarrier BCarrier A
IMAP StandardLightsurfStandardStandardMMS
2 non-standard CDMA picture messaging implementations
For manufacturers, 3 MMS software implementations
Most of CDMA Market has adopted MMS
5 © NOKIA PTT/CDG PTT Event / June 2004
CDMA Fragmentation in PoC
Carrier D Carrier ECarrier CCarrier BCarrier A
Version 4 Version 5Version 3Version 2Version 1PoC Client
5 Carriers, 5 Software Streams
50+ Carriers, 50 Software Streams?
Impact on resources for manufacturers and carriers.
6 © NOKIA PTT/CDG PTT Event / June 2004
Impact of Fragmentation on R & D
Development Cost
Development Time
Testing Time
Testing Cost
Time to Market
Carrier D Carrier ECarrier CCarrier BCarrier A
Identical hardware platform across all carriers
Identical software platform core across all Carriers
Standards-based MMS implementation
PoC implementation, ver. 1
R & D cost of PoC – ver.2
R & D cost of MMS – Lightsurf
R & D cost of PoC – ver. 3
R & D of MMS – IMAP
R & D of PoC – ver. 4
PoC – ver. 5
Core R & D Cost
7 © NOKIA PTT/CDG PTT Event / June 2004
Learning from SMS: Interconnections, Roaming, IOP are key for mass market growth of mobile services
SMS penetration in USA
0%
5%
10%
15%
20%
25%
30%
35%
Dec.99 Jun.00 Dec.00 Jun.01 Dec.01 Jun.02 Dec.02 Jun.03
Date
% u
sin
g S
MS
US SMS interconnections
agreements
Source: Nokia
No SMS interconnections
MMS interconnections and roaming
§ Operators in 20 countries so far have announced national interconnection agreements§ International (GPRS) roaming
coverage ramping up
MMS Interoperability
§ Between different vendors' handsets and infrastructure§ Standardization is the key enabler:
good progress in OMA§ Focus now to test and implement
IOP in products
Optus: 100 % increase in MMS traffic after interconnections put in place
SMS market in USA grew 300-400% Once interconnections were put in place
8 © NOKIA PTT/CDG PTT Event / June 2004
Agenda• PTT Market landscape in CDMA
• Fragmentation• Interoperability effects
• PTT for handsets• Key Features• PTT Client• Specific Requirements• Integration Challenges
• Nokia’s CDMA PTT strategy
9 © NOKIA PTT/CDG PTT Event / June 2004
PTT Key-Features
• ‘Always-on’ connection – instant communication
• One-to-one and one-to-many communication
• Buddies and group management from the handset
• ‘Floor control’ & talking person’s ID• Barge & Alert calls• Presence information
10 © NOKIA PTT/CDG PTT Event / June 2004
PTT Client
• Is the PTT interface for the user• Generally launched during phone power-on• Always running in background• Periodically registers in the server – keep
alive• Receives presence updates• Receives incoming PTT calls
Specific Handset Requirements For PTT
• Dedicated PTT button• High quality speaker• Intuitive, easy to use UI
11 © NOKIA PTT/CDG PTT Event / June 2004
PTT Client Architecture on Handset
CDMA2000 1X
PPP
IP
UDP
SIP RTP
PTT Control VoCoder
UI
Mobile Channel
Protocol Stack
Client Application
- Target Handset integration layer through client application’s exposed APIs
12 © NOKIA PTT/CDG PTT Event / June 2004
Integration Challenges
• Battery life• Realtime in nature – always-on
• integration with a big chunk of handset functionality – proper UI design
•Phonebook•Call log•Feature interactions with other data applications
• Performance issues – Delays, buffering, latency
13 © NOKIA PTT/CDG PTT Event / June 2004
Agenda• PTT for handsets
• Key Features• PTT Client• Specific Requirements• Integration Challenges
• PTT Market landscape in CDMA• Fragmentation• Interoperability effects
• Nokia’s CDMA PTT strategy
14 © NOKIA PTT/CDG PTT Event / June 2004
Nokia’s strategy for PoC
• Support industry- and OMA-process to define an open, multi-vendor, IMS-based PoC standard
• Implement one pre-standard PTT client compatible with the prominent server in CDMA market
• Upgrade to OMA PoC standards based client
15 © NOKIA PTT/CDG PTT Event / June 2004
Thank You!!
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