Universal Service Discovery Protocol

In ubiquitous computing, client should be able to discovery and use any kind of services whenever and wherever they are. We need the service discovery protocol for realization of ubiquitous. This protocol must be reflex dynamic feature of ubiquitous such as service status and location. WS-Discovery, which support peer to peer environment, must find the service every time when the clients required the service. Also, this protocol only support the SOAP based protocol. This fact brings the problem that it does not support interoperability between sub-networks. To solve these problems, we apply the Universal Service Discovery Protocol. It supports any type of service discovery and interoperability between sub-networks. Also, this protocol reflects the features of ubiquitous.