Patent application number | Description | Published |
20120302274 | RADIO COMMUNICATION APPARATUS, RADIO COMMUNICATION SYSTEM AND RADIO COMMUNICATION METHOD - A radio communication apparatus selectively performs one of a first transmission method using for data transmission a radio resource which is assigned by a radio communication apparatus and which can be used on a contention basis by a plurality of radio communication apparatus and a second transmission method involving random access. Alternatively, the radio communication apparatus selectively performs one of the first transmission method and a third transmission method involving a request made to the radio communication apparatus to assign a radio resource for data transmission. | 11-29-2012 |
20120320823 | COMMUNICATION DURATION CONFIGURING METHOD, RELAY STATION, MOBILE STATION AND MOBILE COMMUNICATION SYSTEM - A backhaul is configured in such a manner that a HARQ process in which a HARQ on an upstream access link is incapable of being partly or entirely performed is limited to a particular one of a plurality of HARQ processes. As a result, complexity of scheduling is reduced and efficiency of the access link is improved. | 12-20-2012 |
20130010732 | RADIO COMMUNICATION SYSTEM, RADIO COMMUNICATION APPARATUS, AND RADIO COMMUNICATION METHOD - A radio communication apparatus specifies a radio resource area in which a radio communication apparatus searches for a control signal, on the basis of information about the use of a plurality of frequency bands. Then, the radio communication apparatus transmits a control signal addressed to the radio communication apparatus in the specified radio resource area. The radio communication apparatus calculates the specified radio resource area on the basis of the information about the use of the plurality of frequency bands. Then, the radio communication apparatus searches signals in the calculated radio resource area, out of signals received from the radio communication apparatus, and thereby detects the control signal addressed to the radio communication apparatus. | 01-10-2013 |
20130012218 | MOBILE COMMUNICATION SYSTEM - A mobile communication system comprises a base station and a relay station to relay data transmitted/received between the base station and a mobile station. The base station includes a first scheduler to perform scheduling of initial transmission of the data transmitted/received between the base station and the mobile station via the relay station, and a first manager to manage predetermined wireless resources which are periodically used, as wireless resources used for the initial transmission of the data. The relay station includes a second scheduler configured to perform scheduling of transmission of a message for confirming necessity of retransmission of the data and retransmission of the data and a second manager configured to manage wireless resources used for the transmission of the message and the retransmission of the data. | 01-10-2013 |
20130022005 | METHOD, SYSTEM, AND APPARATUS FOR RADIO COMMUNICATIONS - A first radio communication apparatus transmits first and second control signals to a second communication apparatus. The first control signal carries information to be used in communication performed with a first frequency band. The second control signal carries information to be used in communication performed with a second frequency band. The second radio communication apparatus detects these first and second control signals by attempting signal extraction from received signals with common candidates for control signal length. The first radio communication apparatus controls whether to use one frequency band or more than one frequency band to transmit the first and second control signals, based on bandwidths of the first and second frequency bands. | 01-24-2013 |
20130095767 | RADIO COMMUNICATION METHOD, RADIO COMMUNICATION APPARATUS, AND RADIO COMMUNICATION SYSTEM - A first radio communication apparatus includes a controller and a transmitter. The controller determines timing capable of transmitting a control parameter used for a process for establishing connection to a second radio communication apparatus when the connection is not established between the first and second radio communication apparatus. The transmitter transmits a message including data different from the control parameter to the second radio communication apparatus at determined timing. The second radio communication apparatus includes a receiver and a data processing unit. The receiver receives from the first radio communication apparatus the message transmitted at timing at which the first radio communication apparatus is able to transmit the control parameter. The data processing unit extracts data included in the received message. | 04-18-2013 |
20130100906 | RADIO COMMUNICATION METHOD AND RADIO COMMUNICATION APPARATUS - A radio communication method for performing radio communication by using a plurality of frequency bands in a first radio communication apparatus and a second radio communication, the method including transmitting to the second radio communication apparatus a first channel state information request corresponding to each of the plurality of frequency band, by the first radio communication apparatus; and transmitting to the first radio communication apparatus an information relating to a channel state for the frequency band specified by the first channel state information request, when the second radio communication apparatus receives the first channel state information request, by the second radio communication apparatus. | 04-25-2013 |
20130195071 | RADIO COMMUNICATION APPARATUS, RADIO COMMUNICATION SYSTEM, AND RADIO COMMUNICATION METHOD - Radio communication apparatus perform communication by using a plurality of frequency bands. The radio communication apparatus transmits to the radio communication apparatus by using a first frequency band a control message including identification information indicating a second frequency band different from the first frequency band during a random access procedure. The radio communication apparatus receives the control message from the radio communication apparatus by using the first frequency band and performs data communication by using the second frequency band indicated by the identification information included in the control message. | 08-01-2013 |
20130223328 | RADIO COMMUNICATION METHOD, RELAY STATION AND MOBILE STATION - In a mobile communication system, a mobile station receives intermittently a channel transmitted by a first or second base station through a relay station. Herein, the relay station, before execution of a handover for switching a connection destination of its own station from the first base station to the second base station, transmits information on the second base station. The mobile station, based on the information on the second base station received from the relay station before the handover, controls a timing for receiving the channel from the relay station after the handover. | 08-29-2013 |
20130225175 | RADIO COMMUNICATION METHOD, RELAY STATION, MOBILE STATION, AND MOBILE COMMUNICATION SYSTEM - In a mobile communication system, a relay station connects to a first or second base station, and communicates with a mobile station at a timing corresponding to the destination base station. Before execution of a handover for switching a destination of the relay station from the first base station to the second base station, the relay station transmits a signal regarding the second base station. The mobile station synchronizes with the relay station after execution of the handover, on the basis of the signal regarding the second base station which is received from the relay station before the handover. | 08-29-2013 |
20130242771 | COMMUNICATION DURATION CONFIGURING METHOD, RELAY STATION, BASE STATION, AND MOBILE COMMUNICATION SYSTEM - A communication duration configuring method is used in a mobile communication system with a relay station for relaying wireless communications between a base station and a mobile station. The method includes: configuring at least one of a downlink communication duration in which the relay station receives a transmission signal from the base station while limiting a transmission of a signal from the relay station to the mobile station, and an uplink communication duration in which the relay station transmits the transmission signal to the base station while limiting a transmission of a signal from the mobile station to the relay station; measuring a self-interference amount in the relay station; and controlling a configuration of the communication duration according to the self-interference amount. | 09-19-2013 |
20130250773 | COMMUNICATION DURATION CONFIGURING METHOD, RELAY STATION, AND MOBILE COMMUNICATION SYSTEM - A communication duration configuring method is used in a mobile communication system including a mobile relay station for relaying a wireless communication between a base station and a mobile station. The method includes: configuring at least any of a downlink communication duration where the relay station receives a transmission signal from the base station by restricting a transmission of a signal from the relay station to the mobile station and an uplink communication duration where the relay station transmits a transmission signal to the base station by restricting a transmission of a signal from the mobile station to the relay station; and restricting a transmission of a signal with the mobile station in a first period from detection of a handover until when the communication duration is configured between the relay station and a target base station, and using a desired duration within the first period. | 09-26-2013 |
20130267223 | WIRELESS COMMUNICATION SYSTEM, RELAY STATION, BASE STATION, AND WIRELESS COMMUNICATION METHOD - A wireless communication system is provided in which a relay station relays wireless communication between a base station and a mobile station. The relay station includes an acquiring unit and a notifying unit. The acquiring unit acquires, from the base station that retains information on the mobile station used for the wireless communication, identification information on the base station. The notifying unit notifies the mobile station of the identification information acquired by the acquiring unit. Furthermore, the mobile station includes a reconnecting unit. When connection with the relay station is released, the reconnecting unit performs a reconnection request with respect to the base station that is identified by the identification information that is notified by the relay station. | 10-10-2013 |
20130272241 | WIRELESS COMMUNICATION SYSTEM, RECEIVING DEVICE, TRANSMITTING DEVICE, AND WIRELESS COMMUNICATION METHOD - Provided is a wireless communication system in which high-speed communication is implemented. A receiving device includes an RA managing unit that transmits Msg1 through a PRACH over an SCELL and a D-SR managing unit that transmits a D-SR through a PUCCH over a PCELL before or after the PRACH. A transmitting device includes an RA managing unit that receives Msg1 and a D-SR managing unit that receives the D-SR. The RA managing unit associates a scheduling request with a preamble, and identifies a receiving device. | 10-17-2013 |
20130279390 | MOBILE STATION, BASE STATION, WIRELESS COMMUNICATION SYSTEM, AND WIRELESS COMMUNICATION METHOD - A mobile station that performs wireless communication by using a plurality of wireless carriers, the mobile station includes a transmission managing unit that detects a transmission timing of communication data of a predetermined wireless carrier, and a state managing unit that makes the predetermined wireless carrier an activated state when the transmission managing unit detects the transmission timing of the communication data, and makes the predetermined wireless carrier a deactivated state after the communication data is transmitted and received. | 10-24-2013 |
20130294388 | METHOD FOR WIRELESS DATA TRANSMISSION, COMMUNICATION SYSTEM, WIRELESS TERMINAL APPARATUS AND WIRELESS BASE STATION APPARATUS - A method for radio data transmission in a radio communication system including a radio terminal apparatus and a radio base station apparatus, the method including, transmitting, by the radio base station apparatus, data and a signal indicating radio resource to be used for random access to an asynchronous radio terminal apparatus not synchronized with the radio base station apparatus on an uplink, and transmitting, by the asynchronous radio terminal apparatus to the radio base station apparatus via a random access channel, a reply signal generated based on whether or not the data has been correctly received and on a signal received from the radio base station apparatus and indicating the radio resource. | 11-07-2013 |
20130322339 | WIRELESS COMMUNICATION SYSTEM AND METHOD OF WIRELESS COMMUNICATION - A wireless communication system includes a sending device and a receiving device. The sending device includes a first control unit that sends the state of a buffer by using a first wireless carrier, and a first random access management unit that manages random access performed by the sending device. The receiving device includes a second control unit that receives the state of the buffer by using the first wireless carrier and that performs a data exchange by using a second wireless carrier on the basis of the state of the buffer, and a second random access management unit that manages random access performed by the receiving device. The second random access management unit sends control information that includes a dedicated preamble that is unique to a device. The first and the second random access management units perform non-contention based random access that uses the dedicated preamble. | 12-05-2013 |
20140022998 | BASE STATION, COMMUNICATION SYSTEM, AND COMMUNICATION METHOD - A base station includes plural communication units that each includes a first processing unit that executes physical layer and data link layer processes of radio communication between the base station and a mobile station, and a second processing unit that executes network layer processes of the radio communication; and a third processing unit that is of a network layer and controls a series of radio communication sessions between the base station and the mobile station, based on carrier aggregation using the first processing unit of each of the communication units. | 01-23-2014 |
20140161069 | WIRELESS TERMINAL AND BASE STATION - A communicating unit of a base station performs a plurality of periodic communication services with a wireless terminal. A communication control unit of the base station includes, in a control channel, identification information for distinguishing the periodic communication services one from the other to thereby allow the wireless terminal to control at least one of activation and release of each of the periodic communication services. A communicating unit of the wireless terminal performs the plurality of periodic communication services with the base station. A communication control unit of the wireless terminal controls at least one of the activation and the release of each of the periodic communication services using the identification information included in the control channel transmitted from the base station. | 06-12-2014 |
20140204819 | WIRELESS COMMUNICATION SYSTEM, MOBILE STATION, BASE STATION, AND WIRELESS COMMUNICATION SYSTEM CONTROL METHOD - A wireless communication system includes a mobile station and a base station. The base station includes a blind decoding control unit that transmits a signal including a control signal serving as a trigger to change a decoding process to the mobile station based on a result of measurement of the amount of data of the mobile station. The mobile station includes a blind decoding control unit that selects a signal format to be decoded upon reception of the control signal from the base station, and detects a control signal directed to the mobile station by decoding the signal having the selected format among signals received from the base station. | 07-24-2014 |
20140206375 | RADIO COMMUNICATION SYSTEM, MOBILE STATION, BASE STATION, AND METHOD FOR CONTROLLING RADIO COMMUNICATION SYSTEM - A radio communication system includes a base station and a mobile station. The base station includes a controller that changes communication configurations when a plurality of communications with the mobile station at respective periodic communication intervals are scheduled to occur at the same communication timing so as to control to resolve simultaneous communications. The mobile station comprises a controller that performs communications with the base station using the communication configurations changed by the controller in the base station. | 07-24-2014 |
20140241283 | RADIO COMMUNICATION APPARATUS, RADIO COMMUNICATION SYSTEM, AND RADIO COMMUNICATION METHOD - A radio communication apparatus to perform communication with another radio communication apparatus by using a plurality of pairs of a downlink frequency band and an uplink frequency band, the apparatus includes: a receiving unit configured to receive a control message by using a downlink frequency band of a first pair among downlink frequency bands of the pairs during a random access procedure to said another radio communication apparatus, the control message including identification information indicating use of an uplink frequency band of a second pair different from the first pair, the downlink frequency band of the first pair being monitored for control messages by the radio communication apparatus; and a control unit configured to control the radio communication apparatus to perform data communication with said another radio communication apparatus by using the uplink frequency band of the second pair indicated by the identification information included in the control message. | 08-28-2014 |
20140313978 | BASE STATION, RADIO TERMINAL AND RADIO COMMUNICATION SYSTEM - When completing radio communication with a radio terminal, a transmitting unit of a base station transmits to the radio terminal a validity period of control information on radio communication which has been used to communicate with the radio terminal. When starting radio communication with the radio terminal within the validity period, a communication unit of the base station performs radio communication with the radio terminal without performing a process of exchanging control information. When completing radio communication with the base station, a receiving unit of the radio terminal receives a validity period from the base station. When starting radio communication with the base station within the validity period, a communication unit of the radio terminal performs radio communication with the radio terminal without performing a process of exchanging control information. | 10-23-2014 |
20140314024 | RADIO TERMINAL, RADIO COMMUNICATION SYSTEM, AND RADIO COMMUNICATION METHOD - A communication unit of a radio terminal performs radio measurement of a base station and monitoring of a paging signal within a periodic duration. A controller controls the communication unit so as to perform filtering of the radio measurement within the duration with intervals less than half of the duration. | 10-23-2014 |
20150023343 | WIRELESS COMMUNICATION SYSTEM, MOBILE STATION AND BASE STATION - A base station that performs wireless communication with a mobile station using a plurality of cells, the base station includes: a wireless communication circuitry configured to transmit a first control signal that includes first information used to adjust a transmission timing of the mobile station with the cells and second information that is different from the first information, and a second control signal that includes information indicating whether the second information is used to specify a cell among the cells; and a controller configured to perform control for transmission of the first control signal and the second control signal. | 01-22-2015 |
20150031365 | MOBILE STATION, BASE STATION, AND COMMUNICATION METHOD - A mobile station includes a notifying unit configured to transmit a notification signal to a base station forming a serving cell, when a certain condition used to determine whether or not to perform a handover is satisfied, and a handover processing unit configured to start a handover process according to presence or absence of first communication data after transmission of the notification signal. | 01-29-2015 |
20150055604 | RADIO COMMUNICATION APPARATUS, RADIO COMMUNICATION SYSTEM, AND RADIO COMMUNICATION METHOD - A radio communication apparatus that performs communication with another radio communication apparatus by using a plurality of pairs of a downlink frequency band and an uplink frequency band, the apparatus includes: a receiving unit configured to receive a control message by using a downlink frequency band of a first pair among downlink frequency bands of the pairs during a random access procedure to said another radio communication apparatus, the control message including identification information indicating use of an uplink frequency band of a second pair different from the first pair, the downlink frequency band of the first pair being monitored for control messages by the radio communication apparatus; and a control unit configured to control the radio communication apparatus to perform data communication with said another radio communication apparatus by using the uplink frequency band of the second pair indicated by the identification information included in the control message. | 02-26-2015 |
20150078307 | WIRELESS COMMUNICATIONS SYSTEM, MOBILE STATION, BASE STATION, AND COMMUNICATION METHOD - A wireless communications system includes a base station and a mobile station. The base station transmits a second control signal used for configuring a first interval during which a first control signal having a plurality of formats is monitored and a second interval that is different from the first interval. The mobile station monitors the first control signal for the plurality of the formats during the first interval, and monitors the first control signal for formats fewer than the plurality of the formats during the second interval. | 03-19-2015 |
20150080006 | WIRELESS COMMUNICATIONS SYSTEM, WIRELESS STATION, BASE STATION, AND COMMUNICATIONS METHOD - A wireless communications system includes a base station; and a wireless station. The base station, after receiving a first control signal that includes classifying information, configures by a second control signal, transition of a communication mode and releases by a third control signal, the transition of the communication mode. The wireless station performs transition of a mode of communication by the communication mode configured by the second control signal, and releases by the third control signal, the transition of the communication mode. | 03-19-2015 |
20150085811 | WIRELESS COMMUNICATIONS SYSTEM, WIRELESS STATION, BASE STATION, AND COMMUNICATIONS METHOD - A wireless communications system includes a base station; and a wireless station. The base station reserves, in advance, a radio parameter that includes at least any one among a frequency resource and communication method used in transmission of uplink data by a first control signal transmitted to the wireless station and upon receiving a second control signal from the wireless station, provides authorization for the transmission of uplink data, by transmitting a third control signal to the wireless station. The wireless station, upon transmitting the second control signal to the base station, uses the radio parameter configured by the first control signal received from the base station to perform transmission of the uplink data to the base station. | 03-26-2015 |
20150087348 | RADIO COMMUNICATION APPARATUS, RADIO COMMUNICATION SYSTEM AND RADIO COMMUNICATION METHOD - A radio communication apparatus selectively performs one of a first transmission method using for data transmission a radio resource which is assigned by a radio communication apparatus and which can be used on a contention basis by a plurality of radio communication apparatus and a second transmission method involving random access. Alternatively, the radio communication apparatus selectively performs one of the first transmission method and a third transmission method involving a request made to the radio communication apparatus to assign a radio resource for data transmission. | 03-26-2015 |