Abstract: A method of performing handover in a mobile communication network, a mobile communication terminal using the same, and a mobile network system are provided. The method of performing handover in a mobile communication network includes: receiving QoS requirement on a mobile service basis from a user terminal; determining a most suitable mobile network to QoS requirement of a mobile service as a network for handover; and requesting handover to a base station of a mobile network determined as a network for handover. Therefore, in consideration of characteristics of a mobile network and a quality of a service used by a user, by determining handover to an optimum mobile network on a service quality basis, service interruption due to performing unnecessary handover can be prevented and by effectively distributing traffic of a mobile network, overload of a system can be prevented.

Abstract: A base station measures an amount of traffic within a downlink buffer. If the measured amount of traffic is larger than a threshold value, the base station adjusts a ratio of an available interval and an unavailable interval according to a ratio of the amount of traffic against the threshold value and length of a superframe. If the measured amount of traffic is smaller than the threshold value, the base station adjusts a ratio of the available interval and the unavailable interval according to a ratio of the threshold value against the amount of traffic and length of the superframe.

Abstract: A method for controlling traffic in a mobile communication network is provided. A traffic control apparatus checks locations of a calling terminal and a receiving terminal, and determines whether to perform terminal-to-terminal direct communication based on the locations of the calling terminal and the receiving terminal. A base station of the calling terminal and a base station of the receiving terminal instruct the calling terminal and the receiving terminal to perform the terminal-to-terminal direct communication when the terminal-to-terminal direct communication is determined to be performed.

Abstract: The present invention relates to a location recognition device for recognizing a location by a mobile terminal having a camera and a method thereof. In the above method, the location recognition device photographs a location recognition tag storing location recognition information, and measures a distance to the location recognition tag. Subsequently, the location recognition device analyzes an image of the photographed location recognition tag, and recognizes location information corresponding to the location recognition tag and direction information of the photographed location recognition tag. Accordingly, a location of the mobile terminal is measured by using information of the measured distance and the recognized location information and direction information. In this case, an absolute location coordinate or a logic location coordinate is stored in the location recognition tag.

Abstract: The present invention relates to a personalized service providing system and a profile information classifying and processing method thereof. The system, linked to a plurality of subscriber stations to provide a personalized service to a subscriber station, classifies and processes profile information for the service. In the profile information classifying and processing method, a) subscriber profile information is generated, b) the subscriber profile information is classified into static profile information and dynamic profile information, and c) the dynamic profile information is selected from the subscriber station to manage the selected dynamic profile information and the static profile information is selected from the system to manage the selected static profile information. The the static and dynamic profile information is classified into public and private profile information to manage the classified static and dynamic profile information.

Abstract: A method of performing handover in a mobile communication network, a mobile communication terminal using the same, and a mobile network system are provided. The method of performing handover in a mobile communication network includes: receiving QoS requirement on a mobile service basis from a user terminal; determining a most suitable mobile network to QoS requirement of a mobile service as a network for handover; and requesting handover to a base station of a mobile network determined as a network for handover. Therefore, in consideration of characteristics of a mobile network and a quality of a service used by a user, by determining handover to an optimum mobile network on a service quality basis, service interruption due to performing unnecessary handover can be prevented and by effectively distributing traffic of a mobile network, overload of a system can be prevented.

Abstract: A method and an apparatus for performing handover in a mobile communication network are provided. The method of performing handover in a mobile communication network includes: obtaining a service providing time period and a utility function on a candidate network basis; obtaining a selection function of each of the candidate networks using the utility function and the service providing time period; and selecting a network for handover among the plurality of mobile networks using the selection function. Therefore, in consideration of user satisfaction and a network service quality, utility functions are defined and by selecting a network for handover using the utility functions, a network suitable for a user environment can be effectively selected and thus it is possible to perform handover that has a performance and a cost suitable for user request and that can maximize a quality of a mobile service.

Abstract: A method and an apparatus for performing handover in a mobile communication network and a mobile communication terminal using the same are provided. The method of performing handover in a mobile communication network includes: receiving information about signal intensity of mobile networks to which a user terminal can be connected; selecting at least one of connectable mobile networks as a network for handover using user information including information about user requirement and information about the received signal intensity; requesting approval of handover of the user terminal to the selected network for handover and receiving result information about the approval request from the network for handover; and transmitting information about a network in which handover is approved among the networks for handover to the user terminal.

Abstract: A soft handover method in a multiple wireless access network environment and a server for the same are provided. The present invention provides a handover method comprising: a first access point registering a user terminal with a registration server; reporting a wireless channel state of the first access point to the registration server; the first access point receiving traffic distributed from the registration server; and determining whether the handover is completed according to the distributed traffic.

Abstract: The present invention relates to a service registration, control, and brokering method in an IMS-based communication system, and a system using the same. In the case that a user moving to a visited network from a home network wants to receive local service in the visited network, the user checks whether the user can receive the local service in the visited network through the home network. If it is possible, a serving call state control function (S-CSCF) that handles service control in the visited network performs local service control upon a user's request and provides the corresponding local service to the user. Accordingly, the user can be more efficiently provided with local services through the S-CSCF that handles the service control of the visited network. In addition, the visited network can provide the user with services that are adapted to a profile of the user.

Abstract: The present invention relates to a location recognition device for recognizing a location by a mobile terminal having a camera and a method thereof. In the above method, the location recognition device photographs a location recognition tag storing location recognition information, and measures a distance to the location recognition tag. Subsequently, the location recognition device analyzes an image of the photographed location recognition tag, and recognizes location information corresponding to the location recognition tag and direction information of the photographed location recognition tag. Accordingly, a location of the mobile terminal is measured by using information of the measured distance and the recognized location information and direction information. In this case, an absolute location coordinate or a logic location coordinate is stored in the location recognition tag.

Abstract: A context information management system provides service mobility that allows user to maintain service even while moving the service environment. That is, when user service environment movement is sensed, user service provided in previous service environment is consecutively provided to the user in the new service environment using the service context information of user service provided in the previous service environment. In such a manner, the service user may continuously use a same service that used in the previous service environment although the user moves to other service environments without a service terminal.

Abstract: The present invention relates to a personalized service providing system and a profile information classifying and processing method thereof. The system, linked to a plurality of subscriber stations to provide a personalized service to a subscriber station, classifies and processes profile information for the service. In the profile information classifying and processing method, a) subscriber profile information is generated, b) the subscriber profile information is classified into static profile information and dynamic profile information, and c) the dynamic profile information is selected from the subscriber station to manage the selected dynamic profile information and the static profile information is selected from the system to manage the selected static profile information. The the static and dynamic profile information is classified into public and private profile information to manage the classified static and dynamic profile information.