Abstract: An information signal transmission device including objects, an event manager, a broadcast manager, and a network messenger. By simply exchanging a message with the event manager, the object can perform message exchange without any discrimination between communication outside the device and communication inside the device or without any discrimination between particular destinations and unspecified destinations. Cooperation between objects within the device and cooperation between devices are thus assured, permitting a time sufficient enough to transmit information signal.

Abstract: An electronic apparatus controls a single or a plurality of objects. The electronic apparatus, which serves as a node, has an attribute information database that stores attribute information of object service modules. A service registry switches off a power supply after transmitting the attribute information stored in the attribute information database to the service registry of another electronic apparatus and delegating it to respond to queries concerning the attribute information provided from an external source. This enables the electronic apparatus to reduce power consumption while maintaining a searching capability.