Abstract:
PURPOSE: A method and device for providing a presence service in an SIP base group communications system are provided to reduce the number of message transceiving processes and the number of transmitted messages, thereby enhancing service performance. CONSTITUTION: A presence server driving unit(301) verifies setup information by reading setup information necessary for operating a presence service device. A user registration unit(302) configures user information using terminal information registered in the presence service device. A presence information extracting unit(303) extracts presence information from an SIP message. A presence information changing unit(304) changes the presence information according to the presence information.
Abstract:
PURPOSE: A marine heterogeneous communication network control device and a method thereof are provided to control a mobile communication network of a vessel relay station and to embed a base station channel card and a terminal for applying heterogeneous communication methods to a wireless relay station. CONSTITUTION: An environment analyzing unit(530) collects marine environmental information such as weather. A resource management unit(550) manages wireless resources of a ground network, a satellite network, and a marine network and wireless resources of an inner network. The resource management unit manages wireless allocation information corresponding to a requested amount of the wireless resources. A network selecting unit(560) selects a terminal corresponding to a specific network by using position information of a vessel, a communication method of ground network connection terminals, a communication method of marine network connection terminals, marine environment information, a service quality standard, and the wireless allocation information. [Reference numerals] (210) GPS receiving unit; (220) Ship communication device; (40) Multiple ground network terminals; (50) Satellite network terminal; (510) Connection unit; (515) Ground network selection unit; (520) Marine network analyzing unit; (525) Marine network selection unit; (530) Environment analyzing unit; (540) Reference management unit; (550) Resource management unit; (560) Network selecting unit; (570) Channel switching unit; (580) Packet conversion unit; (590) Router unit; (60) Multiple marine network communication devices