MIDDLEWARE AND GATEWAYS

Any software layered between a user application and operating system can be termed as middleware. Middleware examples are communication middleware, object oriented middleware, message oriented middleware, transaction processing middleware, data-base middleware, behavior management middleware, RPC middleware etc. There are some middleware components like behavior management middleware, which can be a layer between the client device and the application. In mobile computing context we need different types of middleware components and gateways at different layers of the architecture (Figure 1.2). These are:
1. Communication middleware 2. Transaction processing middleware 3. Behavior management middleware 4. Communication gateways.