Ntt Docomo, Inc.

Ntt Mobile Communications Network, Inc.

Nippon Telegraph and Telephone Corporation

Narumi Umeda

Hideaki Takahashi

Hidetoshi Kayama

Ichiro Okajima

Lan Chen

Koji Omae

Yasushi Yamao

Masahiro Inoue

Hijin Sato

Daisuke Kitazawa

Takehiro Ikeda

Masayuki Motegi

Seizo Onoe

Toshiaki Takao

Heng Qiu

Akihiro Higashi

Shinichi Mori

Hideki Tobe

Kobaruto Shimada

Youichi Douzono

Takehiro Nakamura

Yoshihiro Ishikawa

Etsuhiro Nakano

Koji Ohno

Tomohiro Dohi

Hidenori Aoki

Takanori Utano

Tadashi Matsumoto

Takuya Shinozaki

Yoshifumi Suzuki

Akira Hiroike

Takeshi Yamashita

Jyunichirou Hagiwara

Mamoru Sawahashi

Katsumi Kobayashi

Kouji Ohno

Hirohito Suda

Junichiro Hagiwara

Masami Yabusaki

Shinji Uebayashi

Takatoshi Sugiyama

Sadayuki Hongo

Kengo Yagyu

Hiroyuki Kawai

Shinji Takeda

Akihiro Maebara

Yoshifumi Morihiro

Tomoyuki Yamada

Akira Kaiyama

Hiroto Tooyama

Noriko Uchida

Tsutomu Yokoyama

Kouji Makino

Toyota Nishi

Syuji Yasuda

Noriteru Shinagawa

Shinsuke Sawamukai

Hideo Matsuki

Onoe Seizo

Azusa Wada

Yasuhiro Mita

Ryoichi Kobayashi

Masato Hiraki

Chen Lan

Utano Takanori

Yoshinobu Fukumine

Tamami Suzuki

Kimitoshi Funakawa

Hidemi Yamaguti

Koji Ntt Tomioka-Shataku 8-502 Ohno

Tomohiro Ntt Tomioka Daiichi Dohi

A mobile communication system includes a first radio control device that manages a first cell, a second radio control device that manages a second cell, and a third radio control device. The second cell is set as a handover destination cell of the first cell. The third radio control device manages the second cell as a redundant configuration of the second radio control device. The third radio control device notifies the first radio control device of the third radio control device managing the second cell as the redundant configuration of the second radio control device. The first radio control device sets so that the third radio control device manages the second cell as the redundant configuration of the second radio control device.

Mobile communication system, and mobile communication method and radio control device used in mobile communication system

A controller apparatus, when it receives packets addressed to a mobile terminal, implements paging control in which it transmits a paging notification packet to a paging area of the mobile terminal, so as to obtain location information on the mobile terminal and to determine a forwarding destination of the packets. The controller apparatus includes a paging area forming unit having a plurality of algorithms for forming the paging area. The paging area forming unit is configured to form the paging area of the mobile terminal by an algorithm specified by the mobile terminal.

Control apparatus and mobile terminal

A base station includes: an acquisition unit for acquiring a quantity of stored packets from a mobile station, the quantity of stored packets being stored in a buffer for storing the packets transmitted by the mobile station; a radio resource controller for allocating priority radio resources preferentially usable by the mobile station to a radio channel for the mobile station, and for allocating usable radio resources allowed to be used by the mobile station from the priority radio resources to the mobile station by use of the quantity of stored packets acquired by the acquisition unit; and a result notification unit for reporting a result of the allocation by the radio resource controller to the mobile station.

Base station, radio resource control equipment, mobile station, communication system, and communication method

A wireless control apparatus is disclosed that forms and controls an area of a base station according to an antenna pattern. The wireless control apparatus includes an area formation information gathering part that gathers area formation information pertaining to area formation of a neighboring base station; and an antenna pattern control part that controls and directs at least one of a main lobe, a side lobe, and a null point between the main lobe and the side lobe of the antenna pattern based on the area formation information to reduce frequency interference between a current cell formed by a current base station and a neighboring cell formed by the neighboring base station.

Wireless control apparatus and communication method

A base station comprises a packet classification unit configured to classify packets received/transmitted from/to a plurality of mobile stations into a quantitative guarantee type packet having a request value for communication quality or a relative guarantee type packet not having the request value, and a transmission order controller configured to control a transmission order of the packets for every classified quantitative guarantee type packet and every classified relative guarantee type packet.

Base station, radio communication system, and communication method

In a packet communications system, a control apparatus implements routing control of a received packet directed for the mobile terminal. The mobile terminal includes a plurality of network interface cards; a communication manager configured to select at least one network interface card among from the plurality of network interface cards, in accordance with information regarding the network interface card; and an upper layer manager configured to receive the packet transmitted from the control apparatus, with using a selected network interface card.

Mobile terminal, control apparatus, home agent and packet communications method

The present invention improves a system capacity and satisfaction rate with a quality of service in packet communications performed through a radio link established between a transmitting station and a receiving station by dynamically limiting transmission power of packets in the transmitting station and keeping an increase of an interference level in the receiving station, which belongs to another cell, within a TPC margin. The present invention includes a resource allocatorconfigured to set transmission power of packets in a next step period, by use of transmission power of packets in a preceding step period (slot) and an interference level of the receiving station.

Packet communication system, packet communication method, base station, mobile station, control device, and packet communication program

A base station includes a channel quality detecting unit that detects channel quality between the base station and a mobile station, a buffered data amount monitoring unit, and a modulation and coding set determination unit. The modulation and coding set determination unit determines a modulation and coding set, as a downlink modulation scheme for packet communications, such that a prescribed communication condition corresponding to the channel quality is satisfied, and that padding added to the data buffered in a transmission buffer for subsequent transmission to the mobile station becomes the minimum.

Packet communications taking into account channel quality and buffered data amount

A base station and a scrambling code setting method of automatically setting up a scrambling code, the base station including a scrambling code setting unit for setting up a base station identifier and a provisional downlink scrambling code that is provisionally assigned; and a transmitting unit for spectrum-spreading the base station identifier by the provisional scrambling code, and for transmitting the base station identifier; wherein the scrambling code setting unit assigns a lasting downlink scrambling code based on a report concerning reception of the base station identifier.

Base station, and a scrambling code setting method

A mobile communication system comprises a plurality of transfer devices configured to transfer packets to a visited position of a mobile terminal, a plurality of connection management devices arranged in a network and configured to connect to the mobile terminal, and a mobile terminal including a detection unit configured to detect the transfer device, and a communication unit configured to connect to the connection management device, and transmit/receive packets to/from the transfer device detected by the detection unit via the connection management device.

Mobile communication system, mobile terminal transfer device, and mobile communication method

A network system implements paging control in which the control apparatus, upon receiving a packet destined for a mobile terminal, transmits a paging notification packet to a paging area of the mobile terminal, so as to obtain location information of the mobile terminal and to determine a transfer destination of a received packet. The control apparatus is configured to transmit the paging notification packet to a plurality of router devices included in the paging area. Each of the plurality of router devices is configured to transmit a received paging notification packet to a plurality of access points by multicasting. Each of the plurality of access points is configured to transmit a received paging notification packet to the mobile terminal through a link connection by multicasting, when it is judged that an IP address in the paging notification packet is a predetermined IP address.

Reducing paging control traffic in a mobile system by placing router identifications in the uplink pagin request packet

In packet communications between a mobile terminal and a base station, the mobile terminal checks a priority level of a traffic and judges a type of the traffic, and transmits a reservation signal for a transmission request to the base station when the type of the traffic is a high priority level or realtime type, and does not transmits it when the type of the traffic is a low priority level or non-realtime type, while the base station determines a resource amount to be reserved for packet transmission according to a resource utilization state and the reservation signal for the traffic of the high priority level or realtime type, or an average transmission interval or transmission rate for the traffic of the low priority level or non-realtime type according to margins in remaining resources, and notifies the resource amount or the average transmission interval or transmission rate to the mobile terminal.

Prioritized communication between base station and mobile unit

Growing community of inventors

Yokohama, Japan

Narumi Umeda