OPTIMIZING PUSH TO TALK OVER CELLULAR

Transcription

1 OPTIMIZING PUSH TO TALK OVER CELLULAR ONE TOUCH INSTANT COMMUNICATIONS Mike Koenig VP Product Management Motorola SoftSwitch Division, Wireless Systems Group 1

2 Agenda Opportunities for PoC Performance Enhancement Standards Product Subscriber Devices and Client Interoperability 2

3 MOTOROLA S END-TO-END PoC SOLUTION Handset Clients CDMA2000 1X, GPRS, EDGE, WLAN Intranet/ Internet Server(s) IP Motorola End-to-End PoC Solution Æ Efficient, always connected communications Æ Quick, one-touch connection to one/many users Æ Anywhere, anytime access on a local/national level Æ Standards-compliant solution over Wireless Packet Data Networks Æ Supports migration to Multi Media Domain (MMD)/IP Multi-media Subsystem (IMS) 3

4 MOTOROLA PUSH-TO-TALK HISTORY 1930s and 1940s 1993 Æ Introduced 1 st Walkie-Talkie Two-way Push-to-Talk services for police and military Æ PTT on iden networks 1950s to early 1980s Æ Deployment of CDMA2000 1x with IP packet data service Æ Two-way services become a fundamental need for many public safety agencies Æ Increased adoption by utilities, enterprises and transportation segments 1980s to mid-1990s Æ Trunked systems for non-mission critical users Æ First commercial Push-To-Talk over Cellular (PoC) service - using CDMA Æ Second launch of Push-To-Talk over Cellular (PoC) service 2004: Motorola reveals 14 commercial PoC contracts, several additional trials, and introduces PoC as IMS/MMD Application 4

5 MOTOROLA SUPPORTS PoC STANDARDS EVOLUTION Standards-based PoC Requires Session Initiations Protocol (SIP) Moving to IP Multi-Media Subsystem (IMS) Standard Based Interoperability Handset IOT With Major Vendors PoC Is Supported By 3GPP2 Multi Media Domain (MMD) vision Includes IMS Actively Engaged with Standards to Drive Enhanced Performance RF and Network Recommendations Active participation in PoC consortium and OMA to liaise with 3GPP2 to provide standards based mechanisms for Multimedia applications 5

6 OPPORTUNITIES FOR PERFORMANCE ENHANCEMENT Motorola Application Functions Client / Server Speculation Application Protocols (Server & PDSN) SIP Compression Server Spooling Voice Spooling RAN & Packet Core CDMA Air-Interface & Standards Reduced Setup Time Improved Performance & Capacity Core Network Improvement 6

7 SPECULATION DURING PTT CALL SETUP Speculative Data Call Set Up Originator Mobile client feature - data call origination is placed as user enters Contact List, before the user presses PTT to start the call Handset goes Active on Fundamental Channel (FCH) before user starts call Applies to all PTT call types Standard handset feature today Reduces user perceived PTT Call Setup time 7

8 SPOOLING DURING PTT CALL SETUP - CDMA Late Media No Spooling 1. Invite 2. Invite 4. OK 3. OK 5. Voice PTT Server Expected Performance Time to Talk Permit: 6.0 s Round Trip Response: 8.5 s Actual Setup Time: 6.0 s Server Spooling (Early Media ) 1. Invite 4. Invite 2. OK 5. OK PTT Server 3. Voice 6. Voice Time to Talk Permit: 2.0 s Round Trip Response: 6.0 s Actual Setup Time: 6.0 s Handset Spooling 1. Voice 2. Invite 3. Invite 5. OK 4. OK 6. Voice PTT Server Time to Talk Permit: 0.2 s Round Trip Response: 8.5 s Actual Setup Time: 6.0 s Spooling: Voice is queued before completion of call setup. Gives the call originator the perception that setup is faster 8

9 PoC RAN OPTIMIZATION STANDARDS ROADMAP Reduce Pg Slot Cycle to < 1s, ~ 320ms Optimizing Setup Lead Implementation on 5 Standardized Features Setup Time w/ Standards Enhancements ~ 2.2s Pg w/ Ch Assgn + Semi Dormant, ~ 600 ms Quick Connect: Reconect Plus (Rel D) or Intersystem Page RAN (Rel E) ~ 1.8 s SYNC ID (Rev A), ~ 540 ms Quick Paging (RevA), ~ 500 ms Current Setup Time ~ 6s Setup Time Reduction ~ 3.8 s Header Compression IS835 Rev C IP Packet RLP ACK Protocol H H H H H H Aggregation RTP UDP IP PPP RLP F H H H RLP F H Goal: ~ 2 Second Call Setup With 50% Higher Capacity 9

10 MOTOROLA S POC EVOLUTION PoC Release 1.0 Commercially deployed on CDMA 1X in August 2003 Built on SIP Signaling and RTP / RTCP Standards Talker Arbitration Support PoC Release 2.0 Handset Spooling Fast Talker Arbitration Speculation PoC Release 3.0 3Q 04 PoC Consortium Phase I Signaling Compliance Presence Enhancements RF Efficiency (presence server push) Server Spooling (Early Media) Network Processor IO Card Fast CPU with Enlarged Memory PoC Release 4.0 1H 04 IOS 4.1 Release A Features R-EACH & SDB Consortium Phase II Compliance Cross technology PoC (Vocoder Translation) Goals: Full Standards Compliance with Continuously Improved Performance 10

11 COMMERCIAL DEPLOYMENT EXPERIENCE - PoC RAN and Mobiles Network Initiated is a New Application Paradigm exposes never seen bugs in RAN elements; single load across network reduces issues Optimize On-Channel Activities End of call perform activities Presence updates, GLM Downloads Presence fresh at power down Size RAN Channel Element Data Capacity Minimized blocked calls PCF Capacity Planning Minimize blocked calls PDSN and Core Network PDSN Session Capacity Always On PPP sessions require increased capacity over other packet services Optimal Core Network Design PDSN, Routers and PoC Servers must have limited hops Network capacity must be properly sized Ideal PDSN inactivity timer 20 seconds -- optimal dormancy behavior 11

12 MOTOROLA CDMA PoC HANDSET PORTFOLIO High Quality Speakers Dedicated PTT key Future Push To X phones V65p V60p MOTOCHIC Individual expression through style T300p MOTOMEDIA Mid to high tier solutions that deliver music and gaming experiences MOTOLIFE Entry level for the trendy masses 12

13 MOTOROLA POC PROGRAMS 3 rd PARTY DEVICES Motorola PoC Client available to 3 rd party handset manufacturers PoC Client available for OEM to 3 rd party application developers IOT Program All Major CDMA handset manufacturers engaged 5 major CDMA vendors already testing Testing complete on more than 12 handsets Audio API Vocoder And Audio Motorola PTT User Interface Application (Screen, Keyboard, Address books, and PTT button handlers, Application Glue) PTT Middleware API Motorola PTT Client Middleware (RTP, SIP, SDP, Call Control) Sockets API IP Stack Base OS CDMA API CDMA Drivers Display And Keyboard Driving Open Standard Interfaces and Interoperability 13

14 BEYOND PoC PTX is an evolution of PoC It is more than just pushing voice to a user via PTT; it leverages the same application to push data like images, music, video to another user or groups of users PTX is different than other peer to peer services. PTX is all about real time transfer, urgency, and immediacy of transfer Enablers: Common App/UI for PTX/PTT Multiple data formats Presence enabled, integrated phonebook MMD/IMS Vid 1 PTX Menu Push to Talk Share File Share Image Share Video Share Music EXIT SELECT Packet Switch 14

15 In Summary. The Motorola PoC solution is built upon SIP and MMD/IMS standards, and is optimized for high-performance communications. These services are still in their infancy; voice push-to-talk is just the beginning of the capabilities that Motorola will offer with this new technology. As the standards evolve, Motorola is committed to incorporating new standards compliant functionality. Motorola is the leader in dispatch communications and a key participant in all of the relevant standards bodies: IETF, 3GPP, 3GPP2, OMA Motorola knows how to improve application and protocol performance. We are working with standards bodies in support of PoC Interoperability. Using our strong push to talk IPR to support the industry Through strong product roadmap, partnerships and services; Motorola is dedicated to providing the best performing Push-To services 15

16 To All Our CDMA Push to Talk Customers: THANK YOU! 16

17 CDMA DEVELOPMENT GROUP PTT FORUM Motorola Network Solutions mean.. Driving Growth Managing Cost Rapid Introduction of New Services Increase Usage Successful Provisioning of Data Services Opportunities to Target New Subscribers Leverage Existing Investment Incremental Future Investment Increase Operational Efficiency 17

18 PUSH-TO-TALK OVER CELLULAR OPTIMIZATION SERVICE Motorola s PoC Optimization Service Maintain data and voice performance for both PoC and voice subscribers Capacity planning Improve and maintain optimum latency Maintenance of PoC Key Performance Indicators (KPIs) Audit, simulation, optimization and monitoring services Monitor Optimize PoC Optimization Modules and Phases Motorola s Push-To-Talk Optimization Service Baseline & Audit Dimension Applying Motorola s PTT Experience 18

19 COMMERCIAL DEPLOYMENT EXPERIENCE RAN and Mobiles Network Initiated application contact to dormant mobiles is new application paradigm and exposes bugs in RAN components check versions and patch levels Take advantage of being on channel to perform housekeeping activities at the end of calls or after speculation Presence updates Group and list management down loads Send explicit unsubscribe at power off to keep presence fresh RAN Channel Element capacity - especially in densely populated urban settings such as large corporate office building areas or downtown areas - if not enough CE data capacity in RAN then blocked calls will result PCF design differs by vendor - some have colocated at BSC, some co-locate at MSC, some have as adjunct and capacities vary by vendor. If not enough data capacity in PCF then blocked calls will result PDSN and Core Network PoC requires Always On PPP sessions so users can receive calls and presence at any time. This stresses some current generation PDSN with low session counts Core Network design between PDSN, Control Switch and core router infrastructure. Optimal design with limited or no hops between interconnections (including PDSN, router and CS all in one physical location). Also capacity between POP sites must support the call volumes in busy hour. PDSN inactivity timer - recommend setting to 20 seconds. Must be greater than 10 seconds to ensure the originator does not go dormant waiting for 200 OK and terminator does not go dormant waiting for ACK. 19