Nec Corporation

Nec Communication Systems, Ltd.

Kenki Takagi

Takanori Iwai

Yoshinori Watanabe

Tomoaki Hokao

Hisashi Futaki

Toshiyuki Tamura

Sadafuku Hayashi

Takayuki Kondo

Kenichi Ito

Yukihiro Hara

Nobuhiko Itoh

Naoaki Suzuki

Shinji Masuda

Kazuki Eguchi

Tooru Kikuchi

Ling Xu

Kouichi Kimura

Takahiro Yasaki

Hiroki Aoki

Yohei Miyama

Tomonori Kumagai

Takanori Mikoshiba

Hideki Bessho

A network entity () sends, to a mobility management entity () or a subscriber server (), a request message in order to configure the mobility management entity () to report a second identifier to be used by a radio access network node () for identifying a radio terminal (). Further, the network entity () receives the second identifier from the mobility management entity () directly or through the subscriber server () and communicates with the radio access network node () by using the second identifier. It is thus, for example, possible to allow an MEC server (or an MEC application hosted on the MEC server) and the radio access network (RAN) node to directly exchange therebetween control messages regarding a specific radio terminal.

Mobility management entity, network entity, and method and computer readable medium therefor

A traffic controller () receives, from a traffic monitor (), a first control message generated in response to an increase in a total transmission rate of a plurality of packet flows sent from a plurality of wireless terminals () to a specific external network. The controller () determines, based on an evaluation criterion received from a criteria manager (), one or more packet flows on which traffic shaping is to be imposed. In response to the first control message, the controller () controls a base station within a RAN () or a packet transfer node within a mobile backhaul () to execute the traffic shaping. This, for example, contribute to adjusting traffic that passes through a cellular communication network based on a monitoring result of a total transmission rate of traffic sent from the cellular communication network to the external network.

Communication network apparatus, communication network system, and method of communication network apparatus

A base station includes a wakeup signal transmission part transmitting transmission signal information to a wireless terminal by wireless communication. The transmission signal information includes a wakeup signal starting a given function included by the wireless terminal. The wakeup signal transmission part transmits the transmission signal information including connection information in addition to the wakeup signal to the wireless terminal. The connection information is information for causing the wireless terminal of a destination of transmission of the wakeup signal to connect by wireless communication using the given function.

Base station, wireless terminal, communication system, communication method, and program

A radio communication system according to the present invention includes a base station apparatusthat performs data communication with a communication apparatusby using a predetermined frequency band; a base station apparatusthat performs data communication with a communication apparatusby using the same frequency band as the frequency band in the same coverage area as that of the base station apparatus; determination meansfor acquiring identification information included in a connection request transmitted from the communication apparatusorby using the frequency band, and for determining to connect to the base station apparatuswhen the identification information indicates the communication apparatus, and to connect to the base station apparatuswhen the identification information indicates the communication apparatus

Connection request for base stations that use the same frequency in the same coverage area

A wireless communication system comprises: first wireless base station apparatus that covers first cell; and second wireless base station apparatus that covers second cell that is wider than first cell and overlaps at least a portion of first cell, wherein: in a case of performing communication with mobile station terminal included in first cell, first wireless base station apparatus makes reference to communication quality of the second cell, judges whether or not wireless resource(s) of second wireless base station apparatus is to be reserved, and, when a judgment is made that reservation of wireless resource(s) is necessary, transmits wireless resource allocation request including necessary resource amount to second wireless base station apparatus; and in a case of receiving wireless resource allocation request from first wireless base station apparatus, second wireless base station apparatus allocates wireless resource(s) in accordance with necessary resource amount to first wireless base station apparatus.

Wireless base station apparatus, wireless communication system, wireless communication method, and program

A mobile communication system comprises: a first radio base station apparatus transmitting, after recovering from a service halt state and before starting to execute a stepwise cell area expansion, a notification including an instruction for a cell area reduction corresponding to the cell area expansion to a neighboring second radio base station apparatus; and a second radio base station apparatus reducing a cell area that has been expanded during the service halt state of the first radio base station apparatus, in accordance with the instruction for a cell area reduction included in the notification transmitted from the first radio base station apparatus.

Mobile communication system, radio base station apparatus, cell area cooperative control method and program

To provide a radio communication system capable of reducing the power consumption of a radio base station apparatus. A radio communication system according to the present invention includes a user apparatus () and a radio base station apparatus () that performs radio communication with the user apparatus (). The radio base station apparatus () monitors a communication status of the user apparatus () present within a service area of the radio base station apparatus (), and when there is no user apparatus () performing communication, intermittently transmits a signal that is to be transmitted from the radio base station apparatus () to the user apparatus (). The intermittently-transmitted signal is, for example, a downward common channel signal. Further, the intermittent transmission is performed at regular intervals or random intervals.

Radio communication system, radio base station apparatus, and their control method

In order to synchronize timings of transmission through a radio channel for broadcast communication even when a plurality of base stations communicate independently of one another, a receiverin a radio base stationreceives broadcast information INFOtransmitted from a different radio base stationthrough a radio channel CHfor transmitting the broadcast information. A controllerspecifies a radio channel CHused for broadcast communication by the different radio base stationand adjusts a timing of transmission through the radio channel CHfor broadcast communication in its own radio base stationto be synchronized with a timing of transmission in the different radio base station, based on the broadcast information INFO. A transmittertransmits data through the radio channel CHfor broadcast communication in accordance with the adjusted timing TA of transmission.

Radio base station, radio access network, communication controlling circuit, storage medium, and communication controlling method

A base transceiver station () that transmits same data to a plurality of mobile stations () using a common channel includes a maximum transmit power detector () that detects a maximum transmit power value at each spreading factor during transmission of the data from a transmit power of the data transmitted to the plurality of mobile stations () in cells controlled by the base transceiver station (), and a transmit power determination unit () that determines a transmit power at each spreading factor based on the relation between the maximum transmit power values detected and the spreading factors.

Base transceiver station and method of determining transmit power

A base station apparatus includes a buffer for temporarily storing data to be transmitted to a mobile station in a data queue corresponding to the mobile station, and a controller for performing control of retransmitting data whose retransmission is requested by a mobile station by selecting the data from a data queue corresponding to the mobile station. When retransmitting data to a mobile station, if the data storage amount in a data queue corresponding to the mobile station is equal to or larger than a predetermined threshold value, the controller performs control of making the error resistance on wireless propagation higher than that of the last data transmission to the mobile station. This makes it possible to increase the retransmission data reception success probability of a mobile station, and suppress the occurrence of retransmission control by an upper layer.

Base station apparatus and data retransmission method of the same

A base transceiver station () that transmits same data through a common channel shared by a transmission path includes a cell total transmit power detector () that detects, with respect to each of a plurality of cells, a total amount of the transmit power for transmitting the data to mobile stations () located inside each of the cells, a relative value information receiver () that receives relative value information for relatively correcting the total transmit power, from the base transceiver station controller, and a weight adjustment and power determination unit () that corrects the total transmit power for transmitting the data with respect to each cell, based on the relative value information received by the relative value information receiver and the total transmit power detected by the cell total transmit power detector, and determines a modified total transmit power.

Base transceiver station, MBMS base transceiver station system, method of determining transmit power, and method of controlling transmit power

A wireless base station unit () monitors total transmission power, which is a sum of transmission power to all of mobile station terminals (-) connected for communication. When the total transmission power exceeds a first threshold value, which is a criterion for judging whether to reduce the transmission power or not, an upper limit value of the transmission power to the mobile station terminal at the lowest priority level is reduced by a prescribed quantity. When the total transmission power exceeds a second threshold value, which is larger than the first threshold value, communication connection with the mobile station terminal at the lowest priority level is cut.

Growing community of inventors

Tokyo, Japan

Kenki Takagi