Transcript BMRC_MIG_9_16_98

ICEBERG: From
POTS to PANS
Bridge to the
Future
Anthony D. Joseph
Randy H. Katz
B. R. Badrinath
UC Berkeley
BMRC MIG Seminar
September 16, 1998
http://iceberg.cs.berkeley.edu
Cellular “Core” Network
Transparent Information Access
Speech-to-Text
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
Activity-based
Smart Spaces
• Walk into a A/V room and control
everything with your own wireless PDA
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Services for each device
Automated discovery and use
Automated UI generation
Composite behaviors
• Phones as well as PDAs
– Speech-enabled control
Potentially Any Network Service
(PANS)
Same service in different networks
Service handoff between networks
2-way Paging
GSM/CDMA
IAP
IAP
IAP
E.g., “follow me” service
E.g., any-to-any service
IP
IAP
WIP
High BW IP core
Diverse access links
PSTN
IAP
Iceberg Access Points
(More than gateways)
• Provide policy engine
• Handle routing, security
ICEBERG: Internet-based core
for CEllular networks BEyond
the thiRd Generation
• Project: June 1998 - June 2001, joint with Ericsson
• The Challenge
– Developing service intensive, network-based, real-time applications
– Securely embedding computational resources in the switching fabric
– Providing an open, extensible network environment: heterogeneity
• Computing
– Encapsulating legacy servers and partitioning “thin” client functionality
– Scalability: 100,000s of simultaneous users in the SF Bay Area
• High BW IP backbones plus diverse access networks
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Different coverage, bandwidth, latency, and cost characteristics
Third generation cellular systems: UMTS/IMT2000
Next generation wireless LANs: Bluetooth
Home networking: DSL / Cable modem
Important Trends
• Multimedia / Voice over IP networks
– Lower cost, more flexible packet-switching core network
– Simultaneous delay sensitive and delay insensitive flows
(RSVP, Class-based Queuing, Link Scheduling)
• Intelligence shifts to the network edges
– User-implemented functionality
• Programmable intelligence inside the network
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Proxy servers intermixed with switching infrastructure
TACC model & Java code: “write once, run anywhere”
Rapid new service development
Speech-based services
• Implications for cellular network infrastructure
of the 21st century?
– High BW data (384 Kb/s-2 Mb/s): Reliable Link Protocols
Outline
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Example Services
Challenges and Trends
Project Goals
Experimental Testbed
Project Approach and Strategy
Research Areas
Summary
ICEBERG Project Goals
• 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 A/V equipped rooms in Soda Hall
ICEBERG Project Goals
• Understand the implications for cellular network
design based on IP technology
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Cellular / IP interworking functionality
IP network provisioning for scalability
“Soft” QoS for delay-sensitive flows
Multinetwork mobility and security support
• Understand how 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
Experimental Testbed
Nino
Velo
IBM
WorkPad
MC-16
Motorola
Pagewriter 2000
CF788
306 Soda
WLAN /
Bluetooth
405 Soda
326 Soda “Colab”
Pager
H.323
GW
GSM BTS
TCI @Home
Smart Spaces
Personal Information Management
SimMillennium
Network
Infrastructure
Millennium Cluster
Millennium Cluster
Project Approach
• Understanding three key research areas
– Cellular / IP integration
» Mobility Management
– Wireless link management
» Packet Scheduling in GPRS and W-CDMA
» Reliable Link Protocols
– Proxy- and Multicast-Enabled Services
» Speech / Information dissemination
• ProActive Infrastructure: NINJA
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Computing resources spread among switching infrastructure
Computationally intensive services: e.g., voice-to-text
Service and server discovery
Security, authentication, and billing
Internet-Scale Systems
Research Group
Personal Information Management and “Smart Spaces”
Distributed Videoconferencing
Room-scale Collaboration
Speech and Location
Aware Applications
ICEBERG
Computer-Telephony Services
MASH Media Processing Services
Active Services Architecture
TranSend Extensible
Proxy Services
Distributed Computing Services: NINJA
Computing and Communications Platform: Millennium/NOW
Project Strategy
GSM Infrastructure Elements
-- Data over PBMS GSM Network
-- GSM Base Station
-- Integration with IP-infrastructure
Analyze
Existing Systems
Prototype Elements
Design
-- Handset/computer integration
-- Java-enabled components
--Speech-based services
Next
Generation
ns & BONES Simulations
-- Ericsson channel error models
-- GSM-based infrastructure
-- GSM media access & link layer
Implement
New System
Outline
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Example Services
Challenges and Trends
Project Goals
Experimental Testbed
Project Approach and Strategy
Research Areas
Summary
Cellular / IP Integration
• Integrating a GSM BTS with an IP core network
– Mapping IP signaling to SS7 radio management
– Call admission and handoff
• Mobility management interworking
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Mobile IP uses home agent / foreign agent
GSM uses Home Location Register / Visiting Location Register
Handoff between Mobile IP and GSM networks
Scalability, security of Mobile IP?
• Generalized redirection agents
– User- or service-specified dynamic policy-based redirection
» 1-800 service, email to pagers, etc.
– Service mobility as a first class object
GSM BTS-IP Integration
Interactive Voice Response
Simulates BSC
and MSC
functionality
Infocaster
VAT
PC
Control
BTS
Signaling
E1
Signaling
NetMeeting
IP-PAD
Internet
UPSim
Ethernet
Traffic
E1: Voice @ 13kb/s
Data @ 12kb/s
GSM Phone
Demo in 440 Soda after the talk
H.323 GW
PSTN
Service Mobility as a
First-Class Object
“Anthony@Berkeley”
Universal Names: Globally unique IDs
An Entity has a universal
name and a profile;
Entities are people or
processes
OfficePSTN: 510-643-7212
FaxPSTN: 510-643-7352
DeskIP: rover.cs.berkeley.edu:555
LaptopIP: fido.cs.berkeley.edu:555
PCS: 510-388-7212
E-mail: [email protected]
Home: 510-555-1212
Profile: set of
domain-specific names
Iceberg Inter-Domain
Naming Protocol
IAP
Call(Randy@Berkeley,
Caller’s network,
Interactive,
CallerID certificate)
Replicated
Information:
• Real-time
• Lazy
• Epidemic
IDNP
Server
Profile weeks/months
System
State
minutes/hours
Policy days/weeks
IDNP
Server
Wireless Link Management
• Modeling GSM media access, link, routing, and
transport layers
– Validated ns modeling suite and BONES simulator
– GSM channel error models from Ericsson
• QoS and link scheduling for next generation links
– High Speed Circuit Switched Data (HSCSD), General Packet
Radio System (GPRS), and Wideband CDMA (W-CDMA)
– RSVP signaling integration with bottleneck link scheduling
• Reliable Link Protocols
– Wireless links have high error rates (> 1%)
– Reliable transport protocols (TCP) interpret errors as congestion
– Solution is ARQ protocol, but retransmissions introduce jitter
RLP-TCP Collection & Analysis Tools
• RLP and TCP interaction measurement / analysis
– Both are reliable protocols (link and transport layers)
– Trace analysis tool to determine current interaction effects
– Trace collection/analysis for design of next generation networks
TCP: End-to-End Reliability
RLP: Wireless Reliability
GSM Network
BTS
TCP / RLP stats
Demo after talk
BSC
MSC
RLP stats
Post-processing tool
(120 bytes/s)
TCP / RLP stats
TCP and RLP Data Plot
Sent 30,720 bytes from mobile host to stationary host
Bytes
45000
40000
TCP Bytes
35000
TCP Acks
30000
RLP Bytes
25000
RLP Ack
20000
15000
10000
5000
0
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5
10
15
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Seconds
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New Services
• 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
Simulated Ninja Environment
• Speech is the ubiquitous access method
– Access from millions of phones (analog to digital cellular)
Gateway
Cell Phone
RTP
IP-Pad
(BTS)
RMI
Service Entity
Room Control
UDP
Simja
Server
Room
(MASH)
Entity
Entity
Barbara
Emre
Interactive Voice Response to
A/V Devices Application
• First application: Controlling A/V devices
• Next application: Personal Information Mgmt (PIM)
Path
Audio
Microphone
ICSI
Speech
Recognizer
Text
Text to
Command
Cell phone
A/V
Devices
Cmd
Room
Entity
Response
to Client
Demo after talk
Summary
• Large-scale testbed deployment is progressing well
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Lots of work by the students during the summer
BTS-IP integration progressing
Iceberg testbed will be mostly completed this fall
Testbed will enable development of new protocols
• Lots of on-going design work
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Automatic path creation
Service handoff: Passing metadata across/through networks
IVR: More applications and devices (WindowsCE)
Service location and discovery
» Query model and security
– RLP implementation in IP-PAD
ICEBERG: From
POTS to PANS
Bridge to the
Future
Anthony D. Joseph
Randy H. Katz
B. R. Badrinath
UC Berkeley
BMRC MIG Seminar
September 16, 1998
http://iceberg.cs.berkeley.edu
Cellular “Core” Network