| Patent application number | Description | Published |
|---|
| 20100111207 | TRANSMITTER AND METHOD FOR CONFIGURING TRANSMISSION FRAME - A transmitter which transmits information in transmission frame to a receiver, the transmission frame including multiple transmission symbols and guard intervals obtained by replicating a fixed time period of a transmission symbol, generates a transmission frame by making phases of one transmission symbol out of two transmission symbols and a guard interval thereof continuous with phases of the other transmission symbol and a guard interval thereof, when the two continuous transmission symbols are the same. | 05-06-2010 |
| 20110009141 | RADIO STATION, TRANSMITTING STATION, AND FREQUENCY BAND SHARING METHOD - The invention has a step where a transmitting station in a second radio communication system determines whether transmission of a second radio communication system signal using a shared frequency band is possible or not based on load information of a first radio communication system broadcast from a base station in the first radio communication system, a step where the transmitting station in the second radio communication system calculates predicted interference power caused in a receiving station in the first radio communication system by the second radio communication system signal transmitted using the shared frequency band, and a step where the base station in the first radio communication system increases an allowable interference level of a first radio communication system signal transmitted using the shared frequency band based on the predicted interference power broadcast from the transmitting station in the second radio communication system. | 01-13-2011 |
| 20110019634 | RADIO COMMUNICATION APPARATUS AND METHOD - A disclosed radio communication apparatus includes an intermediate band detecting unit detecting an intermediate band which is a band between a first frequency band and a second frequency band which are allocated to a same mobile communication system or different mobile communication systems, a use status detecting unit detecting an uplink/downlink multiplexing method used in each of the first frequency band and the second frequency band, and a determination unit determining, based on the intermediate band and the uplink/downlink multiplexing method, the uplink/downlink multiplexing method usable in the intermediate band and a guard band in which use of frequencies are prevented, the guard band being included in the intermediate band. | 01-27-2011 |
| 20110044214 | MOBILE COMMUNICATION SYSTEM - In a mobile communication system including a base station and a user terminal which communicate with each other according to FDD (frequency division duplex), an uplink frequency band and a downlink frequency band which are adjacent to each other are divided into plural time slots. The user terminal includes an interference detecting unit configured to detect interference in the downlink frequency band; and a time slot information generating unit configured to generate information about an available time slot in the downlink frequency band based on the detected interference. The base station includes a time slot allocating unit configured to allocate a time slot to be used in the downlink frequency band based on the information about the time slot received from the user terminal. | 02-24-2011 |
| 20110059701 | RADIO COMMUNICATION APPARATUS AND RADIO COMMUNICATION METHOD IN COMMUNICATION SYSTEM - A radio communication apparatus includes: a receiving unit configured to receive a cognitive signal including system information of each of a plurality of systems; a metric unit configured to prepare metric information indicating relationship degree between the radio communication apparatus and a communication system to which the radio communication apparatus does not belong; a condition determination unit configured to determine whether a restriction should be imposed on transmission by the radio communication apparatus based on the system information and the metric information; and a transmission unit configured to transmit a signal using predetermined radio resources when transmission by the radio communication apparatus is not prohibited. | 03-10-2011 |
| 20110134855 | TRANSMITTING/RECEIVING DEVICE, WIRELESS TERMINAL DEVICE AND WIRELESS COMMUNICATION DEVICE - The present invention provide a transmitting/receiving device that includes a sensing period information setting part for, in an interfering system that shares at least a part of a frequency band with an interfered system, setting sensing period information that shows a sensing period for a signal using a shared frequency band; and a transmission prohibition period information notifying part for notifying a terminal in the interfering system of transmission prohibition period information for prohibiting transmission processing in the interfering system until an end of the sensing period, a maximum transmission period for one transmission by the terminal in the interfering system prior to a start point of the sensing period. | 06-09-2011 |
| 20110136525 | RADIO BASE STATION, RELAY APPARATUS AND RADIO COMMUNICATION METHOD - A radio base station determines a communication mode for each radio communication terminal from among a direct mode for communicating without via a relay apparatus, a relay mode for communicating via the relay apparatus by using a directional beam transmitted between the radio base station and the relay apparatus, and a combined mode for communicating by combining the direct mode and the relay mode based on the reception power information acquired from each radio communication terminal, and communicates with the each radio communication terminal by using the communication mode determined for the each radio communication terminal. | 06-09-2011 |
| Patent application number | Description | Published |
|---|
| 20080207239 | TRANSMITTER APPARATUS, MOBILE COMMUNICATION SYSTEM, BASE STATION AND COMMUNICATION ENABLE SIGNAL TRANSMITTER APPARATUS - The present invention has an object of providing a transmitter apparatus, a mobile communication system, a base station and a communication enable signal transmitter unit, which can prioritize communications of a mobile station in a priority communication system over communications of a mobile station in a non-priority communication system, in a network where the priority communication system and the non-priority communication system coexist in the same communication area. | 08-28-2008 |
| 20090088083 | BASE STATION, RECEIVING DEVICE, MOBILE TERMINAL, AND FREQUENCY SHARING METHOD - A disclosed base station is used in a first wireless communication system using a first frequency band that is the same as or adjacent to a second frequency band used by a second wireless communication system, and includes a propagation loss estimation unit configured to estimate propagation loss of a signal in the first frequency band when the signal arrives at a receiving device of the second wireless communication system; a frequency difference calculation unit configured to calculate a frequency difference between the first frequency band and the second frequency band; a maximum transmission power determining unit configured to determine maximum transmission power based on the estimated propagation loss and the calculated frequency difference; and a transmission control unit configured to transmit a signal with transmission power less than or equal to the maximum transmission power determined by the maximum transmission power determining unit. | 04-02-2009 |
| 20090098904 | COMBINED COMMUNICATIONS SYSTEM, PROHIBITING-SIGNAL TRANSMITTING APPARATUS, WIRELESS BASE STATION, AND METHOD - A prohibiting-signal transmitting apparatus for use in a combined system such that there is at least a partial overlap between bands allocated to an old communications system and bands allocated to a new communications system is disclosed. The apparatus includes a unit which monitors for a band-in-use, over which communications are actually being conducted, out of the bands allocated to the old communications system; a unit which generates a prohibiting signal indicating that the band-in-use should not be used in the new communications system; and a unit which transmits the prohibiting signal to a communications apparatus of the new communications system. | 04-16-2009 |
| 20100219884 | TRANSMITTER, RECEIVER, POWER AMPLIFICATION METHOD, AND SIGNAL DEMODULATION METHOD - There is provided a transmitter including a nonlinear input-output conversion characteristic control unit configured to determine a nonlinear input-output conversion characteristic for converting a signal depending on a usage status of a frequency band; an amplitude control unit configured to convert an amplitude of the signal based on the determined nonlinear input-output conversion characteristic; and a transmission power amplification unit configured to amplify power of the signal with the converted amplitude. There is also provided a transmitter including a nonlinear input-output conversion characteristic control unit configured to determine a nonlinear input-output conversion characteristic for converting a signal depending on a usage status of a frequency band; plural transmission power amplification units having different nonlinear input-output conversion characteristics; and a selecting unit configured to select one of the plural transmission power amplification units based on the determined nonlinear input-output conversion characteristic. | 09-02-2010 |
| 20110165851 | SIGNAL DETECTION APPARATUS AND SIGNAL DETECTION METHOD FOR USE IN RADIO STATION OF RADIO COMMUNICATION SYSTEM - A signal detection apparatus | 07-07-2011 |
