Patent application number | Description | Published |
20100104042 | COMMUNICATION SYSTEM, TRANSMISSION DEVICE, RECEPTION DEVICE, AND COMMUNICATION METHOD - There is provided a communication system capable of achieving a high usage efficiency of frequencies without the need for cooperation of multiplexed users. A communication system communicates over frequency channels set by dividing a frequency bandwidth assigned to the system allows interference between channels by overlapping the adjacent frequency channels with each other in the frequency domain, or a transmitting and receiving device, which transmits and receives a signal by allowing the interference between symbols at a waveform level for each channel to decrease the occupied bandwidth, is provided with ICI removal and ISI compensation filter | 04-29-2010 |
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 |
20110124374 | BASE STATION APPARATUS AND METHOD - A base station apparatus includes a distribution unit configured to distribute control information on a per-segmented area basis, the segmented area resulting from segmentation of a coverage area into multiple segmented areas, a storage unit configured to store the control information corresponding to the segmented areas, and a determination unit configured to determine a distribution method for each of the segmented areas. The determination unit determines one of a distribution method of periodically distributing the control information corresponding to the segmented areas in the coverage area in charge of the base station apparatus and a distribution method of distributing the control information corresponding to a segmented area requested by a terminal apparatus in response to the requesting by the terminal apparatus. | 05-26-2011 |
20110130164 | BASE STATION, TERMINAL EQUIPMENT, AND METHOD FOR MOBILE COMMUNICATION SYSTEM - A base station includes an internal-area information storing unit storing system information necessary to connect to radio systems in an area to which the base station belongs; an external-area transmission method information storing unit storing external-area transmission method information indicating a method of transmitting a common control signal in an area adjacent to the area to which the base station belongs; and a transmitting unit wirelessly transmitting the common control signal including the system information stored in the internal-area information storing unit or the external-area transmission method information to the terminal equipment. The common control signal including the external-area transmission method information is transmitted at regular or irregular transmission timings. | 06-02-2011 |
20110182377 | RADIO COMMUNICATION SYSTEM - The second radio communication system selects one or more of the sub-carriers S | 07-28-2011 |
20110183703 | BASE STATION APPARATUS, RADIO NETWORK CONTROLLER, AND TERMINAL APPARATUS AND METHOD - A base station apparatus includes a transmitting unit which transmits control information with an area as a unit, which area is in multiple numbers and each of which area is divided from a coverage area; a storing unit which stores control information corresponding to the divided area; and a determining unit which determines an order of distribution for each of the divided areas. The determining unit includes either or both of a unit which randomly determines the order of distribution for each of the divided areas and a unit which determines an order of distribution for distributing the same information with another base station apparatus. | 07-28-2011 |
20110237179 | DISTRIBUTION APPARATUS, TERMINAL APPARATUS, SYSTEM, AND METHOD - A distribution apparatus which distributes to multiple regions includes: a storage unit which stores each of radio communications systems usable for each of the regions; a selecting unit which selects, out of the multiple regions to which the distribution apparatus distributes, first regions in which a radio communications system in operation is the same; and a distribution unit which distributes, based on each of the radio communications system usable for each of the regions that is stored in the storage unit, all or some of information on the radio communications system for each of the first regions selected by the selecting unit. One or multiple radio communications systems are usable in each of the regions. | 09-29-2011 |
20110244903 | DELIVERY SYSTEM, DELIVERY APPARATUS, TERMINAL APPARATUS AND METHOD - A delivery system includes a delivery apparatus for delivering a common control signal to an area having one or more available communication systems and a terminal apparatus for receiving the common control signal transmitted from the delivery apparatus. The common control signal includes system information required to access the communication systems in the area, and the system information includes multiple control information items. The delivery system causes the delivery apparatus to generate a first common control signal commonly used in one or more areas, to receive a delivery request signal from the terminal apparatus requesting to deliver a certain control information item and to generate a second common control signal including the certain control information item to transmit to the terminal apparatus. Criteria to determine which of the control information items is to be included in the first common control signal are updated in accordance with a statistical tendency of the delivery request signals from the terminal apparatuses. | 10-06-2011 |
20110244904 | DELIVERY APPARATUS, TERMINAL APPARATUS, SYSTEM AND METHOD - A delivery apparatus for delivering to multiple areas, wherein one or more radio communication systems are available in each of the areas, includes a storage unit configured to store system information for each of the areas, the system information being required to connect to the available radio communication systems, a detection unit configured to detect a second delivery apparatus for delivering to a portion of the delivery areas of the delivery station and a delivery unit configured to deliver system information for each of the areas as control information, the system information being required to connect to a radio communication system available in the area. If the detection unit detects the second delivery apparatus, the delivery unit delivers system information as the control information, the system information in the storage unit excluding a portion of the system information required to connect to a radio communication system available in an area where the second delivery apparatus is responsible for delivering the control information. | 10-06-2011 |
20110250835 | DISTRIBUTION SYSTEM, DISTRIBUTION APPARATUS, TERMINAL APPARATUS, AND METHOD WHICH DISTRIBUTE A COMMON CONTROL SIGNAL - A distribution apparatus distributes a common control signal to one or more regions with one or more communications system which can be used. The common control signal includes system information required for accessing the communications system of each of the regions. The distribution apparatus has a unit which generates the common control signal of each of the regions, a unit which receives a distribution request signal from a terminal apparatus which requests for distribution of the common control signal, and a unit which transmits the common control signal according to a distribution rule. The distribution rule is updated according to a statistical trend of the distribution request signals received. | 10-13-2011 |