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Contrail: Mobile-to-Mobile Networking over 3G Networks

Bob. Jane. Alice. Chris. Contrail: Mobile-to-Mobile Networking over 3G Networks. Patrick Stuedi, Mahesh Balakrishnan, Iqbal Mohomed, Morley Mao, Venugopalan Ramasubramanian, Ted Wobber, . Data. Alice. Bob. Motivation: enable selective s haring of data b etween 3G devices.

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Contrail: Mobile-to-Mobile Networking over 3G Networks

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  1. Bob Jane Alice Chris Contrail: Mobile-to-Mobile Networking over 3G Networks Patrick Stuedi, Mahesh Balakrishnan, Iqbal Mohomed, Morley Mao, Venugopalan Ramasubramanian, Ted Wobber, Data Alice Bob Motivation: enable selective sharing of data between 3G devices • Contrail uses two ideas: • Edge Filters • Alice installs a filter on Bob requesting all new photos taken in Seattle Filter “Get status messages from Bob that mention me” “Get photos of Bob’s dog” “Get Bob’s location if he’s in Redmond” • Cloud-based relay • Bob uploads matching photos to the cloud which relays them to Alice Why not build cloud-based application? Privacy The cloud sees (and stores) all your data Efficiency All data is uploaded to the cloud …even if no other device wants it • In Contrail, the cloud is the router • No application state or computation • Cannot view (encrypted) data or filters

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