Abstract: An electric power leveling controller includes an information acquisition unit that acquires information of electric energy consumption from a power consuming device consuming electric energy from the power source and electric energy charged into a power storage device, a storage unit that stores a specific threshold value for each power storage device, and a control unit that causes a first power consuming device to be power-supplied by the power source, causing the power storage device corresponding to the first power consuming device to be charged with a difference between the specific threshold value and the electric energy consumption, causing the power source to supply to a second power consuming device electric energy corresponding to the specific threshold, and causing the power storage device corresponding to the second power consuming device to discharge to the second power consuming device the difference between the electric energy consumption and the specific threshold value.

Abstract: A communication apparatus and method for channel switching for ad-hoc communication provides effective utilization of an infrastructure communication channel while preventing a deterioration in the quality of the infrastructure communication affected by a transmission signal used in the ad-hoc communication. Typically, the number of channels that can be used for a second communication is increased.

Abstract: A mobile communication apparatus includes a storage unit that stores therein correspondence information correlating area and transmission resource; an area deducing unit that deduces in which area the mobile communication apparatus is located; a selecting unit that selects the transmission resource correlated, in the correlation information stored by the storage unit, with the area deduced by the area deducing unit; and a transmitter that using the transmission resource selected by the selecting unit, transmits data to a second mobile communication apparatus.

Abstract: A wireless base station in a wireless communication system includes a memory that stores a plurality of timing patterns that are set such that timings of using the resource are distributed for each of the mobile stations when the mobile stations change a timing of using the resource in accordance with a traveling speed and control unit that allocates one of the timing pattern to the mobile stations.

Abstract: A wireless communication apparatus for performing transmission and reception by using a Time Division Duplexing method is disclosed. The wireless communication apparatus includes a receiving part configured to output a timing signal based on a received timing signal, a transmitting part configured to transmit a timing signal based on the timing signal received by the receiving part, a control part configured to increase a reception opportunity for the receiving part to receive the timing signal and decrease a transmission opportunity for the transmitting part to transmit the timing signal as the accuracy of the timing signal received by the receiving part becomes lower.

Abstract: A mobile station includes a wireless unit that sets a first resource that is used to directly communicate with another mobile station and a second resource that allows the mobile station to communicate with a wireless base station, the first resource and the second resource being set on the basis of resource information concerning the first resource and the second resource.

Abstract: A communication apparatus and method for channel switching for ad-hoc communication provides effective utilization of an infrastructure communication channel while preventing a deterioration in the quality of the infrastructure communication affected by a transmission signal used in the ad-hoc communication. Typically, the number of channels that can be used for a second communication is increased.

Abstract: A mobile radio system for radio communications between a base station and a plurality of mobile stations, as well as among a plurality of mobile stations, including a mobile radio channel assignment method, where each mobile station is capable of acquiring position information of the current position of the mobile station, as well as assigning a frequency channel for radio communications. The mobile station transmits and receives information using the assigned frequency channel, corresponding to the acquired position information.

Abstract: To reduce the processing load such as channel assignment and an authentication process in a plurality of radio base stations and communication terminals, and quickly and efficiently assign channels to the communication channels. The channel assigning method by a radio base station group, includes determining assignment of a communication channel between a communication terminal entering a radio area of the radio station group and all radio base stations within the radio station group by a base station in the radio base station group. Channel assigning information common to the radio base station group is updated as to the determined communication channel and a communication channel is assigned to the communication terminal with reference to the channel assigning information by each radio base station in the radio base station group other than the radio base station.

Abstract: To effectively utilize an infrastructure communication channel and increase a number of channels available for ad-hoc communication in a mobile communication apparatus enabling communication in an infrastructure communication mode for radio communication via a base station and in an ad-hoc communication mode for direct radio communication with another mobile communication apparatus, by providing a communication channel recognizer to recognize an infrastructure communication channel which does not interfere with an infrastructure communication within a radio service area of a base station, from among the infrastructure communication channels assigned for the infrastructure communication and a communication channel diverter to control utilizing a infrastructure communication channel, recognized by the communication channel recognizer, as a channel for the ad-hoc communication mode.

Abstract: An IP packet relay apparatus provided between networks to relay an IP packet relating to a host belonging to a specific group, comprising: a list in which an IP address possessed by a host is associated with a group identifier for identifying a group to which the host belongs; a judgment unit judging whether an IP packet that has received from one network and is addressed to a host connected to another network is an IP packet relating to the same group or not with reference to the list; and a forwarding unit relaying an IP packet judged to be the IP packet relating to the same group.

Abstract: A service providing system is disclosed including multiple state management servers each provided to a segment of a service area. When a user terminal stays in the segment to which the state management server is provided, the state management server manages state information of the owner of the user terminal. The system also includes an application server that executes an application program for providing the user terminal with a service. The state management server manages the state information of the owner of the user terminal staying in the segment to which the state management server is provided. The state management server can dedicate itself to manage only the state information of owners of user terminals staying in the segment for which the state management server is responsible. Even if the service area is large and a large number of users stay in the service area, the load on each state management server can be reduced.

Abstract: A wireless tag 1 carried by a user sends a user ID stored in an internal memory to a terminal 21 with wireless signals. The terminal 21 sends the user ID from the wireless tag 1 to a messaging server 3. The messaging server 3 relates the user ID with the content (acquired from a content server 4) desired by the user of the user ID, stores them and delivers to the terminal 21 the content corresponding to the user ID from the terminal 21. The terminal 21 outputs the delivered contents to a display unit and so on. The wireless tag 1 moves depending on the movement of the user, the user ID is sent to the messaging server 3 from a terminal 2i where the user has moved, and the content is delivered to the terminal 2i. In this way, the user can receive the delivery of the content with the terminal where the user has moved.

Abstract: The present invention relates to an IP network including mobile environment and, in particular, to a service control network and its control method for providing individual service every user or terminal of an IP network. In a service control network including a service control device for performing Layer-7 service control for mobile terminals, an authentication server device specifies a Layer-7 profile and an associated dependent Layer-3 profile of a mobile terminal at the success of the authentication of the mobile terminal. An edge device transfers packets, which have been received from the mobile terminal after the success of the authentication of the mobile terminal and match the dependent Layer-3 profile, to the service control device. The service control device controls the implementation of a Layer-7 service for packets which have been received from the edge device and match the Layer-7 profile.

Abstract: A content adaptation service control system includes a content adaptation server device for carrying out a predetermined content adaptation service for original content data retained in a content server device in response to a content data acquisition request given from a client device utilized by a user, an edge device, in a network, judging a necessity for, when receiving the content data acquisition request from the client device, starting the content adaptation service and notifying of a startup request, and a service control device determining, when notified of the startup request from the edge device, a mode of the content adaptation service that should be carried out by the content adaptation server device on the basis of contract information about the user subscribing the content adaptation service, and transmitting the determined mode of the content adaptation service as a processing request to the edge device.

Abstract: The present invention relates to a mobile communication system. Particularly, the present invention provides a mobile communication system that has functions of autonomously relieving and recovering from a station-location-information loss phenomenon which may be caused when the system performs switching between active and standby home location registers in response to an occurrence of a fault. This mobile communication system has home location registers, visitor location registers, mobile switching centers, and mobile stations. In this mobile communication system, each of the home location register comprises a rerouting information acquisition section for performing routing information acquisition processing when receiving in response to a routing information acquisition message, which is sent out to one of the visitor location registers a response message indicating that a corresponding one of the mobile stations is not present.

Abstract: A mobile communication system employs narrow paging areas for calling mobile stations without increasing location registration requests to a location management center. This system reduces useless calls and improves the efficiency of use of radio resources. Each local area (1-3) of the system is divided into narrow paging areas (1-4). A storage unit (2-1) is installed in each base station (1-5) or exchange station (1-2), to register mobile stations (1-6). When a base station receives a location registration request from a mobile station, the base station registers the mobile station in the storage unit, and if necessary, transmits a location registration request to the location management center.

Abstract: A mobile communication system employs narrow paging areas for calling mobile stations without increasing location registration requests to a location management center. This system reduces useless calls and improves the efficiency of use of radio resources. Each local area (1-3) of the system is divided into narrow paging areas (1-4). A storage unit (2-1) is installed in each base station (1-5) or exchange station (1-2), to register mobile stations (1-6). When a base station receives a location registration request from a mobile station, the base station registers the mobile station in the storage unit, and if necessary, transmits a location registration request to the location management center.

Abstract: A mobile communication system which performs a handover operation with high-reliability, while the system can flexibly cope with various circumstances in which a mobile station is used, without changing a hardware structure. A plurality of radio base stations form respective radio communication cells. Each of the radio base stations performs a radio channel setting control including a handover with respect to a call originated for the mobile station located in one of the cells. An exchange is connected to each of the radio base stations via a communication link so that the exchange performs a call process of the call in association with the radio channel setting control performed by the radio base stations.

Abstract: In addition to an array of basic call modules each containing a description of a procedure for causing a call state transition from current stable state to next stable state, IN call modules are provided that are activated as tasks independently of the basic call modules. Of the IN call modules, modules equipped with a message generation function contain a description of a procedure necessary for the transmission of a message to a service control point (SCP), and modules equipped with a message analysis function contain a description of a procedure necessary for the analysis of a message from the SCP. When it is determined that a call requires an additional service as a result of DP processing in the basic call processing performed in a basic call module, the basic call processing is interrupted, and an appropriate IN call module is activated. When the IN call processing performed by the IN call module is completed, the basic call module is reactivated to resume the basic call processing.