1. ICEBERG : Internet core for CEllular networks BEyond the thiRd Generation A research project at the University of California, Berkeley Randy H. Katz Anthony D. Joseph Cellular “Core” Network Bridge to the Future Telecomms

2. Emerging Distributed System Architecture Spanning Processing and Access Computing and Communications Platform: Millennium/NOW Distributed Computing Services: Ninja Active Services Architecture MASH Media Processing Services Distributed Videoconferencing Room-scale Collaboration TranSend Extensible Proxy Services ICEBERG Computer-Telephony Services Speech and Location Aware Applications Personal Information Management and “Smart Spaces”

3. MASH Active Services Services supported within the network –Service deployment/instantiation »Service discovery service –Service extension/customization »JAVA or C++ programming model vs. TACC –Service execution “platform” based on clusters »Service Agent (servent): instance in execution »Scalability, robustness based on soft-state, announce-listen 1 st instance: Elan Amir’s video transcoding proxies –Manage video streams across bottleneck links 2 nd instance: Angie Schuett’s video archive server –Introduce stateful services, more complex service deployment

4. MASH Active Services Platform Architecture –Cluster computing –Multicast-based announce- listen protocols Platform Management –Resource management –Load balancing, servent scaling to offered load, robust keep-alive mechanisms Service Environment –Defining services via (MASH shell) scripts Service Management –Launching and halting servents –Decentralized via announce-listen + MC damping Platform Location –Locating a service Service Composition –Servent interaction to enable processing pipelines –E.g., servent client of another servent Service Control –Control protocols running between clients and servents

5. NINJA Infrastructure Focus on component services Vertically “integrated” servicesComponent Services E.g., dynamic composition, rapid deployment, reuse, data only, UI defined dynamically based on device/connection, competition at every level … Units (end devices), Active Routers (soft-state), Bases (persistent state) Operators, typed connectors, and paths

6. Experimental Testbed Network Infrastructure GSM BTS Millennium Cluster WLAN Pager IBM WorkPad CF788 MC-16 Motorola Pagewriter 2000 Text Speech Image/OCR 306 Soda 326 Soda “Colab” 405 Soda Ericsson Smart Spaces Personal Information Management Fax

7. Personal Information Management Universal In-box Policy-based Location-based Activity-based Speech-to-Voice Mail Speech-to-Voice Attached-Email Call-to-Pager/Email Notification Email-to-Speech All compositions of the above!

8. Industrial Sponsors: Committed and Potential Ericsson GSM basestation and telephony handsets IBM Workpad thin client access devices Lucent (GSM group and Inferno OS groups) Motorola two-way pagers Sun Microsystems Network Appliances Group ATT Internet Lab (Geoplex Menlo Park) Microsoft Intel Home Networking Group Xerox Sprint 3COM

9. ICEBERG Project Vision Third Generation Cellular Architectures: –Will support diverse air interfaces with different coverage, bandwidth, latency characteristics »TDMA, CDMA, wide-area, local-area, satellite, etc. –Segregated circuit-switching for voice and packet- switching for data (e.g., GPRS) We Will Go Beyond the Third Generation: –A lower cost, more flexible core network can be built using full packet-switching techniques –Delay sensitive and delay insensitive flows are easier to support at the same time in a full packet-switching architecture –Processing embedded in the network enables more rapid deployment of new kinds of applications and services

10. ICEBERG Project Goals Exploit Expertise in IP Protocol Suite and Proxy Architectures to –Demonstrate ease of new service deployment »Packet voice for computer-telephony integration »Speech- and location-enabled applications »Complete interoperation of speech, text, fax/image across the four P’s: PDAs, pads, pagers, phones) »Mobility and generalized routing redirection –Demonstrate new system architecture to support innovative applications »Personal Information Management Universal In-box: e-mail, news, fax, voice mail Notification redirection: e.g., e-mail, pager »Home networking and control of “smart” spaces, sensor/actuator integration Build on experience with Colab, 306/405 Soda

11. ICEBERG Project Goals Understand –Implications for cellular network design based on IP technology »IP network provisioning for scalability »Pragmatic QoS for delay-sensitive flows »Multinetwork mobility and security support –How to use the emerging Ninja/Active Services infrastructure to »Encapsulate existing applications services like speech-to-text »Deploy and manage such computationally intensive services in the network »Integrate other kinds of services, like mobility and redirection, inside the network

12. Project Strategy Analyze Existing Systems Design Next Generation Implement New System ns Simulations -- Ericsson channel error models -- GSM-based infrastructure -- GSM media access & link layer GSM Infrastructure Elements -- Data over PBMS GSM Network -- GSM Base Station -- Integration with IP-infrastructure Prototype Elements -- Handset/computer integration -- Java-enabled components -- ProActive infrastructure

13. Specific ICEBERG Project Areas Mobility Management Packet Scheduling in GPRS and W-CDMA Proxy- and Multicast-Enabled Services

14. Mobility Management Mobile IP-GSM Mobility Interworking –Mobile IP-GSM authentication interworking –Scalability of Mobile IP/hierarchical agents Multicast support for mobility –Alternative approach for mobility based on M/C addresses –Exploit multicast routing to reach mobile nodes without explicit handoff –Combine with real-time delivery of voice and video Generalized redirection agents –Policy-based redirection: e.g., 1-800 service, email to pagers, etc. –Redirection agents collocated with multicast tree branching points

15. Packet Scheduling Validated ns modeling suite for GSM media access, link layer, routing, and transport layers –GSM channel error models QoS-aware High Speed Circuit Switched Data (HSCSD), General Packet Radio System (GPRS), and Wideband CDMA (W-CDMA) link scheduling –RSVP signaling integration with bottleneck link scheduling –Fairness and utilization for TCP and RTP flows –Delay bound scheduling for R/T streams –Exploiting asymmetries in downstream/upstream slot assignment, CDMA self-interference

16. New Services Proxies for Telephony-Computing Integration –GSM-vat-RTP interworking: handset-computer integration –Encapsulating complex data transformations »Speech-to-text, text-to-speech –Composition of services »Voice mail-to-email, email-to-voice mail –Location-aware information services »E.g., traffic reports –Multicast-enabled information services »Multilayered multicast: increasing level of detail as number of subscribed layers increase

17. Project Schedule Year 1: 1998 –ns modeling, validation –GSM BTS-IP integration –Initial design of mobility interworking and intelligent networking services Year 2: 1999 –GSM-Wireless LAN integration –Design of information-push applications –Implement mobility interworking Year 3: 2000 –Extend testbed with W-CDMA and GPRS –Roaming, scheduling, new applications demonstrations –Fine-tuning and documentation

18. Goals for Today Review where we are and determine who is working on what: –Infrastructure Building: simulation models, testbed elements –Performance and Modeling: data over cellular, GPRS scheduling –Network Design Issues »Mobility »Scalability –Service Architecture and Applications Realizable milestones for the summer: –10 weeks between now and August! –Posters for June 10-12 BARWAN Retreat »Excellent opportunity for industry feedback –Ericsson 2 Day Review in Early August »Initial results »Demonstrations!