Rapid Mobility via Type Indirection Ben Y. Zhao, Ling Huang, Anthony D. Joseph, John D. Kubiatowicz Computer Science Division, UC Berkeley IPTPS 2004.

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Presentation transcript:

Rapid Mobility via Type Indirection Ben Y. Zhao, Ling Huang, Anthony D. Joseph, John D. Kubiatowicz Computer Science Division, UC Berkeley IPTPS 2004

IPTPS wired network Rapid Mobility large-scale mobile deployment becoming a reality

IPTPS Our Approach Warp: mobility infrastructure on structured P2P overlay route using in-network indirection directory service API (DOLR): RouteMsgToObject(ObjectID, Data) treat mobile nodes as objects on their proxy Flexible hierarchy for fast handoff layers of overlay forwarding hops longer hops in wide-area, shorter hops in LAN implicit hierarchy: only modify short hops if moving locally Aggregate control traffic for mobile crowds “elect” mobile trunk node to tunnel traffic for others reduce control traffic to one handoff per crowd Routing, hierarchy, aggregation all managed by P2P protocol

IPTPS Decentralized Object Location & Routing Decentralized directory API on structured peer to peer overlays Server “publishes” object: overlay distributes location pointers to log(n) nodes Clients route message towards object’s ID, redirect when location pointer found Performance from locality-aware routing and local convergence properties

IPTPS Registration / Routing

IPTPS Fast Proxy Handover

IPTPS Mobile Crowds mp

IPTPS Type Indirection Overlay Node Mobile Node … … Register / Handoff Proxy node Mobile node object on static node Mobile Node … J o i n / L e a v e Mobile node object on mobile node leaf Mobile Crowd trunk Leverage built-in indirection in object location layer of DOLR Can further iterate type indirection: e.g. PDAs on train passenger Type Indirection

IPTPS Routing Performance compare warp to Mobile IP add redundant root to reduce end to end latency

IPTPS Handoff Latency compare time for Mobile IP, Warp and Warp full convergence

IPTPS Related Work Fast handoffs hierarchical handoff (Caceres96) hierarchical Mobile IP (Perkins96) incremental route establishment (Keeton93) Session mobility (Snoeren00) ROAM (I3) (Zhuang03) in-network traffic redirection pointers (triggers) can do hierarchical mobility, node aggregation placement of triggers up to mobile node

IPTPS Summary Flexible name-based hierarchical mobility treat mobile nodes as “objects” on overlay proxy routing protocol manages traffic redirection points virtual paths eliminate home agent and triangle routing no notion of “home network” Aggregation to reduce control traffic treat leaf nodes as “objects” on mobile trunks Self-managing network redirection rely on self-organizing protocol for aggregation, hierarchical handoff, fast route establishment protocol adapts to node failures, topology changes

Thanks… Comments, questions?

IPTPS Handoff Load