Fujitsu Corporation

Ryuichi Takechi

Hideaki Ono

Tsuguo Kato

Yoshiaki Ohta

Kazuhisa Obuchi

Takayoshi Ode

Yoshinori Tanaka

Yoshiharu Tajima

Satoshi Kuroyanagi

Shinichiro Aikawa

Naotoshi Watanabe

Junichi Suga

Katsumasa Sugiyama

Takeshi Kawasaki

Hiroshi Tomonaga

Jyoei Kamoi

Kazuo Hajikano

Takayuki Sasaki

Toshio Shimoe

Hiroshi Sasaki

Satoshi Kakuma

Masami Murayama

Keiichi Nakatsugawa

Tetsuo Tachibana

Yutaka Ezaki

Tadahiro Takase

Toru Fujisawa

Teruaki Hagihara

Masaaki Wakamoto

Haruyuki Takeyoshi

Mitsuharu Amano

Yoshihiro Kawasaki

Hitoshi Yamada

Tomohiro Ishihara

Naoki Matsuoka

Masafumi Katoh

Masaaki Kawai

Yoichiro Igarashi

Hideaki Takusagawa

Akira Hakata

Miwako Watanabe

Keiichi Nakatugawa

A base station device includes a processor a communicator. The processor configured to perform, when a terminal device performs wireless communication by using both a first wireless communication method that is a wireless communication method with the base station device and a second wireless communication method that is a wireless communication method with a relay device, data communication by converging the wireless communication in a convergence layer in the first wireless communication method. The communicator configured to identify, even when the relay device relays data that is transmitted and/or received by the second wireless communication method to the base station device by any of the wireless communication methods of the first wireless communication method and the second wireless communication method, a bearer in the first wireless communication method to which the data belongs, and transmit and/or receive the data.

Base station device, relay device, and communication system

A communication system includes: a first communication apparatus configured to control a first wireless communication and a second wireless communication different from the first wireless communication; a second communication apparatus configured to communicate using the second communication; and a third communication apparatus configured to perform data communication with the first communication apparatus via the first wireless communication or the second wireless communication, wherein the third communication apparatus transmits to the first communication apparatus a control message that includes an available address of the third wireless communications apparatus used in the second wireless communication, the first communication apparatus notifies the second communication apparatus of the available address of the third communication apparatus, and the second communication apparatus communicate with the third communication apparatus using the address.

Wireless communications system, base station, mobile station, and processing method

A wireless communications system includes a first wireless-communications-apparatus that controls a second wireless-communication by a controller for a first wireless-communication; a second wireless-communications-apparatus capable of the second wireless-communication; and a third wireless-communications-apparatus capable of data transmission with the first wireless-communications-apparatus via the first or second wireless-communication, and that transmits to the first wireless-communications-apparatus, a control message including an address thereof for the second wireless-communication. When data is transmitted from the first wireless-communications-apparatus to the third wireless-communications-apparatus through the second wireless-communications-apparatus via the second wireless-communication, a processor in the first wireless-communications-apparatus for the first wireless-communication transfers the data to the second wireless-communications-apparatus through an adaptation sublayer and notifies the second wireless-communications-apparatus of the address acquired from the control message. The data is already processed in a convergence layer for performing the first wireless-communication. The second wireless-communications-apparatus transmits the data to the third wireless-communications-apparatus via the second wireless-communication, using the notified address.

A wireless communications system includes a base station configured to control a second wireless communication different from a first wireless communication by a control unit configured to control the first wireless communication; and a mobile station configured to be capable of performing data transmission between the mobile station and the base station, using one of the first wireless communication and the second wireless communication. When data is transmitted between the base station and the mobile station using the second wireless communication, a sender station among the base station and the mobile station performs transmission control of using an identifier of a bearer of the data transmitted to a receiver station among the base station and the mobile station and using correspondence information of the identifier and an access category that is QoS information in the second wireless communication to identify the access category of the data and transmit the data.

Wireless communications system, base station, and mobile station

A control method in a mobile communication system, that includes configuring a discard timer corresponding to a service data unit (SDU) for discarding the SDU according to a value of the discard timer that indicates a time elapsed since the discard timer started at reception of the SDU; when a handover is performed, maintaining the value of the discard timer corresponding to the SDU and taking over the elapsed time of the SDU; and discarding the corresponding SDU when the value of the discard timer reaches a given value.

Method for dropping packet data, radio communication device, and mobile communication system

A control method in a mobile communication system, that includes configuring a discard timer corresponding to a service data unit (SDU) for discarding the SDU according to a value of the timer; maintaining the value of the discard timer corresponding to the SDU when a handover is performed without restarting or resetting the value of the discard timer; and discarding the corresponding SDU when the maintained value of the discard timer reaches a given value.

A network system including a mobile node, a correspondent node for transmitting/receiving a data packet to/from the mobile node, a first router to which the mobile node is connected at a visited domain and a second router to which the mobile node is connected at a moving destination to which the mobile node moves from the first router. The second router including a location registration message generating unit for generating a location registration message of the mobile node and transmitting the location registration message. The first router including a binding cache, a movement managing unit for receiving the location registration message and storing into the binding cache address information from before and after the mobile node moves and an encapsulating unit for receiving the data packet, encapsulating the data packet concerned, and creating and transmitting a data packet containing as a transmission destination the address information after the change.

Transmitting and receiving location registration messages and data packets in a communication system

A control method in a mobile communication system, that includes configuring a timer corresponding to packet data for discarding the packet data according to a value of the timer; maintaining the value of the timer corresponding to the packet data when a handover is performed without restarting or resetting the value of the timer; and discarding the corresponding packet data when the maintained value of the timer reaches a given value.

A mobile communication system, that includes a buffer storing packet data to be sent; and a controller configured for discarding the packet data according to a value of a timer corresponding to the packet data, maintaining the value of the timer corresponding to the packet data when a handover is performed without restarting or resetting the value of the timer, wherein the discarding further includes discarding the corresponding packet data when the value of the timer reaches a given value.

A wireless communication system includes a first base station; one or more second base stations having transmission power lower than the first base station; a mobility management apparatus for managing a location of a mobile terminal in a location registration area accommodating the first base station and the one or more second base stations. The mobility management apparatus includes a selecting unit that selects at least one of the second base stations transmitting a paging signal from among the one or more second base stations, and a paging unit that transmits a paging signal to the mobile terminal via the first base station accommodated in the location registration area, and the at least selected one of the second base stations.

Wireless communication system, communication control method, mobility management apparatus, mobile terminal and base station

A control method in a mobile communication system with a buffer unit for temporarily storing packet data to be sent, includes dropping the packet data stored in the buffer unit before sending when a drop timer corresponding to the packet data before sending reaches a given value or when a drop condition required by a drop mechanism accompanying the buffer unit is satisfied, and dropping the packet data stored in the buffer unit after sending when a drop timer corresponding to the packet data after sending reaches a given value.

A network/service control method comprises a step of acquiring, when providing a communication service to a user, a user context defined as knowledge information about the user associated with an environment surrounding the user and a past behavior pattern of the user, a step of acquiring a user profile defined as information about a user's favorite registered previously by the user at arbitrary timing, and a service control step of determining network requirements for providing the communication service on the basis of the user context and the user profile.

Network/service control method

In a load balancer preserving a function of server consistency maintenance during communications even if a terminal is a mobile terminal, identifying information specific to a mobile IP terminal is extracted from an arrival packet, and a destination server to be connected is determined based on the identifying information. Also, a home agent or a terminal is requested to notify a change of the care-of address when the care-of address of the terminal has changed, and a destination server to be connected is determined by regarding the notified care-of address as identifying information.

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Kawasaki, Japan

Ryuichi Takechi