Towards%20Wireless%20Overlay%20Network%20Architectures

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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
Bridge to the Future
Telecomms
Cellular Core Network
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Emerging Distributed System Architecture Spanning
Processing and Access
Personal Information Management and Smart Spaces
Distributed Videoconferencing Room-scale
Collaboration
Speech and Location Aware Applications
ICEBERG Computer-Telephony Services
MASH Media Processing Services
TranSend Extensible Proxy Services
Active Services Architecture
Distributed Computing Services Ninja
Computing and Communications Platform
Millennium/NOW
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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
• 1st instance Elan Amirs video transcoding
  proxies
• Manage video streams across bottleneck links
• 2nd instance Angie Schuetts video archive
  server
• Introduce stateful services, more complex service
  deployment

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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

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NINJA Infrastructure

• Focus on component services

Vertically integrated services
Component 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
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Experimental Testbed
Fax
IBM WorkPad
Image/OCR
Text
Speech
MC-16
Ericsson
CF788
Motorola Pagewriter 2000
WLAN
Pager
306 Soda
405 Soda
326 Soda Colab
GSM BTS
Millennium Cluster
Smart Spaces Personal Information Management
Millennium Cluster
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Personal Information Management
Speech-to-Voice Mail Speech-to-Voice
Attached-Email Call-to-Pager/Email
Notification Email-to-Speech All compositions of
the above!
Universal In-box Policy-based Location-based Acti
vity-based
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Industrial SponsorsCommitted 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

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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

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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 Ps 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

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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

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

• Mobility Management
• Packet Scheduling in GPRS and W-CDMA
• Proxy- and Multicast-Enabled Services

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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

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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

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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

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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

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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!