Push to Talk on Rev. A: Setting the New Standard

Transcription

1 Push to Talk on Rev. A: Setting the New Standard by Dan Esposito Clarity Communication Systems, Inc. for the CDG Technology Forum on Unique Applications Enabled by CDMA2000 1xEV-DO Rev. A Thursday, November 9, 2006 Resorts Atlantic City Atlantic City, New Jersey Presenter Name Title

2 Outline Clarity Corporate Background PTT Application Before EVDO-revA PTT on reva PTT Evolution: RevA Enabled Capabilities Extending the PTT Service Scope with reva Public Safety PTT Standards Summary 2

3 Clarity Corporate Background 3

4 Corporate Background Founded in 1998 Headquarters in Aurora, IL Additional teams in AZ, CO, and NJ ISO 9000 certified since 2001, TL 9000 since industry respected professionals Broad and deep experience in wireless Profitable since inception 4

5 Clarity Products and Services High Performance PTT Solutions intouch service in North America and CALA incom extends PTT for public safety Get Map Get Address Get Directions Award Winning LBS Solutions Where2Talk combines PTT and location Whereabouts tracking; winner of CTIA s 2005 NAVTEQ LBS Challenge Best Safety & Security Application Custom Product Development for Tier 1 Vendors 5

6 PTT Application Before EVDO-revA 6

7 intouch PTT on CDMA 1xRTT VoIP Packet Data Solution SIP Signaling RTP/UDP/IP Media High Performance to Compete in iden-available Markets Application Layer Client and Server Solution OTA downloadable BREW client for feature evolution RF Efficient Mature Product and Feature Set Evolves to IMS and OMA PoC Commercially Deployed Through VeriSign 7

8 intouch PTT Application Layer Architecture OA&M C-LAN Mobile Client PTT PC Client Contact Admin Browser Local Admin Browser Database Presence Call Server OAM&P Browsers intouch System Internet Internet Firewall Firewall AAA Wireless Wireless Access Access Network Network PDSN/GGSN PDSN/GGSN PDN PDN DNS 8

9 intouch PTT Performance Measurements Latencies (Seconds) Initial push-to-chirp: Typical: Active to Dormant Active to Active Dormant to Dormant In-Call push-to-chirp Voice Latency: Initial In-call Clarity (1xRTT)

10 Can PTT Run on EVDO rev0? Suppose we port the client to a rev0 mobile Keep vocoder, call models, etc. The result is a step backwards from 1xRTT No QoS results in choppy speech or worse during heavy traffic 1xRTT uses FCH as a proxy QoS guarantee High minimum data rate can cause inefficiency RevA is required to allow to match 1xRTT Of course reva allows PTT to surpass 1X implementation too 10

11 PTT on reva 11

12 Basic PTT on RevA Port the PTT client to a reva handset Make initial enhancements: Request QoS suitable for PTT voice quality E.g. Pick a FlowProfileID If reservation is granted, proceed with call If not Hand down to 1xRTT if available Deny call if no 1x or reva service in a cell Use same vocoder and packetization as 1x solution 1x/RevA Interop enables smooth transition to reva; no users or handsets stranded 12

13 Performance Enhancements Call Setup Latency Reduction RevA enables higher bandwidth signaling Use separate MFPA or EMFPA flow for signaling Reserve a higher data rate RevA enhanced idle state activation Brings TCH active quicker on OM RevA sub synchronous channel Quicker paging and activation of TM TCH RevA Data Over Signaling (DOS) Allows PTT app to use the RAN control plane for near instant communication between OM, PTT server, and TM Requires very short app control plane messages 13

14 Performance Enhancements Media Latency Reduction RevA higher data rates enable Fewer voice frames per packet Shorter packet transmit and receive time RevA Robust Header Compression (ROHC) enables Shorter packets (media and app signaling) Better efficiency, especially with lower frame : packet ratio 14

15 intouch Performance Results Latencies (Seconds) Initial push-to-chirp: Typical: Active to Dormant Active to Active Dormant to Dormant In-Call push-to-chirp Voice Latency: Initial In-call Clarity (1xRTT) Clarity (reva) 0.5(1.2*) * Without call anticipation feature 15

16 PTT Evolution: RevA Enabled Capabilities 16

17 Enhancing PTT Capabilities RevA Multi-Flow Packet Application (MFPA) and EMFPA enable the PTT app to supplement voice with additional media, such as: PTT with integrated LBS services Maps with mobile locations GeoTalk Groups, PTT with video Push to see; push to show Transition to full duplex to VoIP call Each type of communication gets its own flow and associated QoS (FlowProfileID) 17

18 Where2Talk Mobile App Press OK Get Map Get Address Get Directions Press OK Press OK & Scroll Down Location on the Contact List Easy access to maps and addresses Address for Jim» 2640 White Oak Circle» Aurora, IL» Press OK Get Map Get Address Get Directions 18

19 Extending the PTT Service Scope with reva 19

20 Extending Group Call Capacity Many users can be located in the same cell sector Emergency site Enterprise; e.g. office building This limits group call size to available channels, unless PTT utilizing reva Broadcast Multicast Service (BCMCS) breaks this barrier Forward talk spurts go on BCMCS multicast channel Group size can go as high as BCMCS limit Radio efficiency is improved 20

21 Public Safety PTT 21

22 Public Safety PTT Needs Public Safety workers currently use Land Mobile Radio (LMR) PTT on Cellular can meet public safety needs if key requirements are met such as: Low latency High site capacity Emergency calling High Coverage RevA is a key enabler for the first 3 Latency and site capacity have been discussed RevA Priority Access enables PTT emergency calling 22

23 InCom PTT Connects Agencies Cellular Data Network RFSS 1 ISSI PTT Srvr Multi-System Interconnect PTT Srvr Client Interface DHS LMR Radio Network RFSS 2 ISSI RFSS 3 ISSI Local PD LMR Radio Network PoC/LMR architecture developed further in Clarity & Cingular s contribution to Project MESA. See: 23

24 Standards 24

25 Standards Key standards for PTT: Internet Multimedia Subsystem and Multimedia Domain (IMS/MMD) Open Mobile Alliance PTT over Cellular (OMA PoC) EVDO reva is compatible with both 25

26 intouch OMA PoC Architecture Mobile Phones DM Server Clarity PoC Application Server Sh/Si ISC XDMS Presence Server Location... Subscriber Data Cx Session Control HSS S-CSCF P-CSCF I-CSCF IMS Infrastructure DNS Wireless Wireless Access Access Network Network PDSN/GGSN PDSN/GGSN PDN PDN AAA 26

27 Summary 27

28 EVDO-RevA Accelerates PTT Evolution PTT App Needs RevA Support Benefits Voice quality Network efficiency 1x/RevA interop Low call setup latency Low media latency Supplement voice with LBS, MM, full duplex Extend group call capacity Enable public safety usage Evolve to IMS & OMA PoC QoS Lower data rates Higher data rates MFPA EMFPA Enhanced idle state activation Sub synchronous channel DOS ROHC BCMCS Priority access Quality user experience Minimized costs Responsive Enhanced services New revenue streams Extended market reach Broader handset selection Extended communication communities 28