Ntt Docomo, Inc.

Takeshi Ihara

Manhee Jo

Masahiro Sawada

Yasuhisa Hayashi

Masami Yabusaki

Shoichi Hirata

Takatoshi Okagawa

Jun Kakishima

Jun Sasaki

Shinichi Isobe

Atsushi Iwasaki

Yoshikazu Akinaga

Akira Miura

A cluster extractor extracts a plurality of clusters based on communication records between communication terminals. A clustering coefficient calculator, an average path length calculator, and a degree distribution calculator calculate a clustering coefficient, an average path length in an advertisement distribution target cluster, and a degree distribution, respectively, based on communication records between communication terminals belonging to an advertisement distribution target cluster. An advertising strategy determiner determines an advertising strategy, based on the clustering coefficient and the average path length, and a distribution target determiner determines a distribution target terminal, based on the degree distribution and the advertising strategy. A determined target notifier notifies a communication management device of the distribution target terminal and the advertising strategy and an advertisement distributor distributes an advertisement according to the advertising strategy to the distribution target communication terminal.

Distributing advertisements to distribution target nodes based on a clustering coefficient

A system for controlling handover is disclosed that includes a mobile terminal that enables communications with multiple wireless systems having wireless access stations, and a handover-controlling apparatus that executes control of handover for the mobile terminal, which travels among multiple types of wireless systems. The mobile terminal includes a destination wireless system determining unit that receives downlink signals from the corresponding wireless access stations so as to determine which wireless system accommodates a destination wireless access station based on reception quality of downlink signals. The mobile terminal also includes a destination wireless system reporting unit that sends information indicating the determined wireless system to the handover-controlling apparatus. The handover-controlling apparatus includes a handover-controlling unit that controls handover operations for the mobile terminal based on the information indicating the determined wireless system, which is sent from the destination wireless system reporting unit.

System, method and apparatus for controlling mobile terminal handover

The packet switching system for transmitting and receiving a packet via a packet switching network, which comprises a plurality of routing tables (#. . . ), each of which has been generated by a unique routing policy, stored in the routing apparatuses deployed at the border, at the origin or at the end of the respective routing domains, an identifier (RTI) inserted in the packet to specify the routing tables, and an identifier changer to change a value of the identifier on the packet switching network. The routing apparatus selects one of the routing tables (#. . . ) according to the RTI in the received packet and transfers the packet to a destination that is specified by the selected routing table.

Packet switching system, packet switching method, routing apparatus, structure of packet, and packet generating method

A communications system which allows data transfer not using a terminal ID assigned by an access network but using routing information distinct from the terminal ID is provided. The communications system transmits data including, as a destination address, a second terminal ID, from a first terminal to the second terminal via a plurality of transfer devices. A first transfer device includes a first memory for storing the second terminal ID and routing information for routing the data to a second transfer device, associating them with one another, and a routing processor for adding to the data the routing information for routing the data to the second transfer device associated with the second terminal ID included in the data, and transferring the data to the second transfer device.

Communications system, communications method, network manager, and transfer device

A network control system, which controls connections between a mobile terminal and multiple types of wireless systems accommodated in a network, includes a prescribed node provided on the network. The node comprises signal transmitting/receiving means that transmits and receives a control signal defined by each of the wireless systems, protocol converting means that converts the control signal to a common protocol independent of each of the wireless systems, and entity communication controlling means that communicates with multiple functional entities provided on the network, using the common protocol, to implement network control.

System and method for controlling network, network controlling apparatus, and mobile terminal used in network control system

A router includes a clock configured to be synchronous to a transmission terminal that transmits a data packet; a comparator configured to compare a delay time of the data packet with an acceptable delay time of the data packet based on the time obtained from the clock; and a packet processing unit configured to either transfer or discard the data packet based on the comparison result of the comparator.

Router, terminal apparatus, communication system and routing method

A mobile communications system is disclosed that includes a first local routing manager (LRM) providing a first network in which a mobile terminal is currently located, a second local routing manager (LRM) providing a second network in which a counterpart terminal communicating with the mobile terminal is currently located, and a home routing manager (HRM) managing correspondence between the unique home address of the counterpart terminal and the second network. The first LRM has a controller that acquires address information of the counterpart terminal from the second LRM, via the HRM, when the first LRM does not have the address information, and communication means that transmits the address information of the counterpart terminal to a router of a new cell in the first network when the mobile terminal moves into the new cell.

Mobile communications system and routing management apparatus used in the mobile communications system

A mobility control apparatus comprises: a mobility control unit configured to perform a first processing in accordance with movement of a mobile communication terminal and generate a notification related to the first processing; a processing unit configured to perform a second processing different from the first processing performed by the mobility control unit, based on the notification; and a notification providing unit configured to obtain the notification from the mobility control unit and provide the notification to the processing unit. Moreover, the mobility control apparatus comprises: an instruction unit configured to generate a command to a mobility control unit performing processing in accordance with movement of a mobile communication terminal; a command providing unit configured to obtain the command from the instruction unit and provide the command to the mobility control unit; and the mobility control unit configured to perform the processing based on the command.

Growing community of inventors

Yokosuka, Japan

Takeshi Ihara