Is responsible for facilitating the use of a service. Its functions include transmitting commands from the service consumer to the service provider and receiving results. It is also responsible for maintaining the connection between the consumer and the provider for the duration of their interaction. A good invocation mechanism abstracts communication details from the service consumer and, in the case of network failure, redirects requests to another provider or gracefully terminates (Sen, 2005).
Published in Chapter:
Context-Aware Service Discovery in Ubiquitous Computing
Huaqun Guo (Institute for Infocomm Research and National Univerity of Singapore, Singapore), Daqing Zhang (Institute for Infocomm Research, Singapore), Lek-Heng Ngoh (Institute for Infocomm Research, A*STAR, Singapore), Song Zheng (Institute for Infocomm Research, Singapore), and Wai-Choong Wong (National University of Singapore, Singapore)
Copyright: © 2008
|Pages: 7
DOI: 10.4018/978-1-59140-993-9.ch018
Abstract
The decreasing cost of networking technology and network-enabled devices is driving the large scale deployment of such networks and devices so as to offer many new and innovative services to users in ubiquitous computing. For example, when you carry your mobile laptop or personal digital assistant (PDA) around, or drive on the road, various services have been made available, ranging from finding a local printer to print a file, to instantaneously knowing about the traffic situation from traffic-cameras and other sensors along a highway.