A Group-based Method for Context-Aware Service Discovery in Pervasive Computing Environment

A Pervasive Computing Environment includes a variety of communication networks and service systems and has places suitable for providing variety of services to client. One of the most important problems in such environments is service discovery, i.e. how a client can use his service of interest. In a Pervasive Computing Environment Context, information plays an important role for providing more suitable services to the client. So in this paper, we present a method context aware service discovery with use of context source in the form of an advertisement board for services. A context source with an information register of new entry services and, in addition, forwarding packets, acts like a billboard advertising service. In this context source method, it provides help in registering and advertising services but is not a directory and, if the context source fails, our method can undertake service discovery with other nodes in environment. To evaluate this method a simulation has been carried out. Its statistics and outputs show our suggested method, with its dynamic environment, client movement, directory less, and use of a context source is a suitable method for service discovery which has better results and costs less money and time.