A Survey of Various Middleware Architectures Bhavyan Mehta, Sumeet Maru, Varun Jobanputra

Introduction What is Pervasive Computing? Challenges –Extensibility and Runtime Flexibility –User Friendliness –Service Discovery in Heterogeneous Systems –Energy Efficiency and Network Bandwidth –Coordination amongst distributed components

Wings Architecture Based on –Context –Services –Peers CCM –Functional Components –Containers Pervasive Networking –Service Provision Plugins (SPP) –Host Discovery Plugins (HDP) Context Awareness –Context Awareness Plugins (CAP) Middleware Façade Context Reasoning –Winglets

Compor Component Model Insertion of a new component into an application Invocation of a service in a compor based application

Pervasive Network Module Process of Discovering Services through the installed SPPs

Scooby Architecture

Mires’ Architecture Based on publish/subscribe Hardware –Sensors –CPU –Radio Operating system Mires –Publish/subscribe service –Routing component –Additional services Node or User application

Type of Notification events topicArrival stateArrival topicSetupArrival

Publish/Subscribe Service in Mires Advertise phase Advertise to Publish/Subscribe service P/S sends to network via Multi- Hop Router Bottom part shows interaction when a advertise message comes to a node –Intercept –Update –Forward

Subscribe Phase User Application sends subscribeMsg to all Bcast component signals receive P/S extracts information Signals topicSetupArrival to Services.

Publish and process data Node application publishes data to P/S P/S notifies though topicArrival Service send its local result P/S send to network via Multi- hop router Router intercepts publishMsg and sends to P/S P/S extracts information, informs services of by stateArrival

Middleware for Protocol based Coordination in Dynamic Networks Distributed Application Coordination

Request Allow

Conclusion Thank You Questions?