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SAHARA/I 3 First Summer Retreat 10-12 June 2002

SAHARA/I 3 First Summer Retreat 10-12 June 2002. Randy H. Katz, Anthony Joseph, Ion Stoica Computer Science Division Electrical Engineering and Computer Science Department University of California, Berkeley Berkeley, CA 94720-1776. UC Berkeley Project Team. Industrial Collaborators

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SAHARA/I 3 First Summer Retreat 10-12 June 2002

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  1. SAHARA/I3 First Summer Retreat10-12 June 2002 Randy H. Katz, Anthony Joseph, Ion Stoica Computer Science Division Electrical Engineering and Computer Science Department University of California, Berkeley Berkeley, CA 94720-1776

  2. UC Berkeley Project Team Industrial Collaborators Friends Retreat Goals &Technology Transfer People Project Status Work in Progress Prototype Technology Early Access to Technology Promising Directions Reality Check Feedback

  3. AT&T Research Yatin Chawathe CMU Hui Zhang Ericsson Research Per Johansson (VIF) Martin Korling Hewlett-Packard Labs John Apostolopoulos Wai-Tian Dan Tan Intel Research Timothy Roscoe Keynote Systems Chris Overton Microsoft Research Venkat Padmanabhan Lili Qui Helen Wang Nokia Hannu Flinck Nortel Networks Tal Lavian (PhD student) NTTDoCoMo Takashi Suzuki (VIF) Gang Wu Sprint ATL Bryan Lyles Paul Jardetzky UC Davis Chen-nee Chuah Dipak Ghosal Univ. Helsinki Kimmo Raatikainen Univ. Washington Tom Anderson Other Affiliation Peter Danzig Who is Here (Industry) Italics indicates Ph.D. from Berkeley VIF=Visiting Industrial Fellow

  4. Professors Anthony Joseph Randy Katz Ion Stoica Doug Tygar Postdocs Kevin Lai Technical & Admin Staff Nathan Berneman Bob Miller Keith Sklower Grad Students Sharad Agarwal Matt Caesar Weidong Cui Steve Czerwinski Grad Students Yitao Duan Ling Huang Almadena Konrad Karthik Lakshminarayanan Yin Li Huang Ling Sridhar Machiraju George Porter Bhaskar Raman Anantha Rajagoplala-Rao Mukund Seshadri Jimmy Shih Lakshmi Subramanian Ben Zhao Shelley Zhuang Who is Here (Berkeley)

  5. Retreat Purpose • Second SAHARA retreat • Project launched 1 July 2001 • Review progress, set directions, particularly in terms of integrating the diverse efforts underway • “Generation after next” networks • Software “agents,” not protocols • Converged data and telecommunications networks • Heterogeneous access plus core networks • Emerging network-aware distributed architecture • Confederation vs. brokering in service provisioning • Exploiting network structure-awareness • Four layer “reference” architecture • Industrial feedback and directions • Real-world networking problems/limitations • Helping us do relevant research at Internet-scale

  6. Plan for the Retreat • Monday, 10 June 2002 • 1200-1315 Lunch • 1315-1500 Retreat Overview and Introductions (Randy) • Retreat Overview & Sahara Progress, Randy Katz • Research on Adaptive Systems, Anthony Joseph • I3 Overview, Ion Stoica • 1500-1530 Break • 1530-1700 Routing as a Cross-Domain Service (Randy) • Ion Student: Multicast on I3 • Mukund: Interdomain Multicast • Sharad: Policy Agent for Interdomain Routing • Lakshmi: Overlay QoS  • 1700-1730 View from a Tier-1 ISP (Chen-nee) • 1730-1800 Break • 1800-1915 Dinner (Joint with ROC Retreat) • 1915-2015 Alfred Spector, IBM (Joint with ROC Retreat) • 2015-2100 Student Poster Session

  7. Plan for the Retreat • Tuesday, 11 June 2002 • 0730-0830 Breakfast • 0830-1000 Joint I3/Tapestry Session (Kubi/Ion) • Services on Infrastructure, Kubi/Ion • Mobility on I3, Shelley/Kevin • Mobility on Tapestry, Ben • 1000-1030 Break • 1030-1200 Adaptation and Applications (Anthony) • Modeling/Analysis of Non-Stationary Net Characteristics, Almudena • Always Best Connected, Machi • VoIP Gateway Selection, Matt • 1200-1300 Lunch • 1300-1600 Long Break • 1600-1800 SAHARA Architecture and Brainstorming Session (Randy) • Four Layer Architecture, Bhaskar • Hot Spot WLAN Testbed for Sahara Integration, Jimmy • 1800-1915 Dinner (Joint with ROC Retreat) • 1915-2000 Panel on Robust Manageable Distributed Systems • 2000-2130 Second Graduate Student Poster Session

  8. Plan for the Retreat • Wednesday, 12 June 2002 • 0730-0830 Breakfast • 0830-1000 Six Month Planning (Anthony) • 1000-1030 Break/Room Checkout/Photo Session • 1030-1200 Industrial Feedback (Randy) • 1200-1300 Lunch • 1300-1700 Bus back to Berkeley

  9. SAHARA: 2001-2003 • Service • Architecture for • Heterogeneous • Access, • Resources, and • Applications

  10. JAL Restaurant Guide Service NTTDoCoMo UI Babblefish Translator Zagat Guide User Sprint Tokyo User Salt LakeCity Scenario: ServiceComposition

  11. Sahara Research Themes • New mechanisms, techniques for end-to-end services w/ desirable, predictable, enforceable properties spanning potentially distrusting service providers • Architecture for service composition & inter-operation across separate admin domains, supporting peering & brokering, and diverse business, value-exchange, access-control models • Functional elements • Service discovery • Service-level agreements • Service composition under constraints • Redirection to a service instance • Performance measurement infrastructure • Constraints based on performance, access control, accounting/billing/settlements • Service modeling and verification

  12. Cable Modem Premises- based AccessNetworks LAN Transit Net LAN LAN Private Peering Premises- based Core Networks Transit Net WLAN WLAN Internet Datacenter NAP Analog WLAN Transit Net Public Peering DSLAM Operator- based RAS Regional Wireline Regional Cell H.323 Data Cell Data H.323 Cell PSTN Voice Voice Connectivity and Processing

  13. Cooperative Negotiation & control path Service Service Service Data flow Brokered Negotiation & control path Broker Service Service Service Data flow Service Composition Models

  14. Service Composition Layered Reference Model for Service Composition End-User Applications Applications Services Application Plane Middleware Services End-to-End Network With Desirable Properties Enhanced Paths Connectivity Plane Enhanced Links IP Network

  15. Measurement-based Adaptation Interoperabilty Policy Management Dynamic Resource Allocation Trust Management/ Verification Underlying Composition Techniques Services at Layer i-1 Services at Layer i-1 Services at Layer i-1 Services at Layer i-1 Other Services at Layer i Component Services Layered Reference Modelfor Service Composition Composed Service at Layer i

  16. Mechanisms for Service Composition • Measurement-based Adaptation • Examples • General-purpose third party end-to-end Internet host distance monitoring and estimation service • Universal In-box: Application-specific middleware measurement layer to exchange network and server load using link-state algorithm • Content Distribution Networks: measurement-based DNS-based server selection to redirect client to closest service instance

  17. Mechanisms for Service Composition • Utility-based Resource Allocation Mechanisms • Examples • Auctions to dynamically allocate resources; applied for spectrum/bandwidth resource assignments to MVNO from underlying competiting MNOs • Congestion pricing: influence user behavior to better utilize scarce resources; applied in: • Voice port allocation to user-initiated calls in H.323 gateway/Voice over IP service management • Wireless LAN bandwidth allocation and management • H.323 gateway selection, redirection, and load balancing for Voice over IP services

  18. Mechanisms for Service Composition • Trust Mgmt/Verification of Service & Usage • Authentication, Authorization, Accounting Services • Authorization control scheme w/ credential transformations to enable cross-domain service invocation • Federated admin domains with credential transformation rules based on established peering agreements • AAA server makes authorization decisions, liberating providers from preparing rules for each affiliated domain • Service Level Agreement Verification • Verification and usage monitoring to ensure properties specified in SLA are being honored • Border routers monitoring control traffic from different providers to detect malicious route advertisements

  19. Mechanisms for Service Composition • Policy Management • Visibility into local policies to better coordinate global policies among (cooperating) service providers • Developing inter-AS architecture for load balancing, performance and failure mode policies to be applied throughout the network • Internet topology discovery through AS relationship map of the Internet plus measurement infrastructure • Policy agent framework for inter-AS negotiation to manage incoming traffic

  20. Mechanisms for Service Composition • Interoperability through Transformation • Interoperability of data, protocols, policies among composed service providers • Example • Broadcast federation: global multicast service composed from multicast implementations in different provider domains • Protocol transformation gateways between admin domains employing non-interoperable multicast protocol implementations

  21. Summary and Conclusions • Goal: Evolve (mobile) Internet architecture to better support multi-network/multi-service provider model • Dynamic environment, location-based implies larger numbers of service providers & service instances • Status: architectural specification driven by selected applications and underlying wide-area services • Focus: • Composition across confederated vs. independent service providers: peer-to-peer vs. brokering • Explore new techniques/technologies: • Market-based mechanisms • Trust management, SLA verification, perf. monitoring

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