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Daiichiro Nakashima

Daiichiro Nakashima, Osaka JP

Patent application numberDescriptionPublished
20100195636RADIO COMMUNICATION SYSTEM, BASE STATION DEVICE, MOBILE STATION DEVICE, AND RANDOM ACCESS METHOD - A radio communication system includes a base station device and a plurality of mobile station devices which radio-communicate with the base station device. The base station device allocates random access signal identifiers for identifying random access signals to the mobile station devices and decides an allocation period for each of the random access signal identifiers used by the mobile base stations. During the allocation period, each of the mobile station devices transmits a random access signal corresponding to the allocated random access signal identifier. Thus, it is possible to suppress a delay until the random access procedure using a dedicated preamble is complete.08-05-2010
20110103290WIRELESS COMMUNICATION SYSTEM, MOBILE STATION DEVICE, AND WIRELESS RECEPTION METHOD - A base station device includes: a control signal generator that generates a signal of control data including items corresponding to the type of sub-frames to be allocated; a scheduling information signal generator that generates a signal of scheduling information indicating a sub-frame to be a first sub-frame among sub-frames specified by first-type sub-frame candidate information; and a multiplexer that allocates the signal of the control data to the first-type and second-type sub-frames, and allocates the signal of the scheduling information to the first-type sub-frame. A mobile station device includes: a frame-type determining unit that determines the type of each of received sub-frames based on the first-type sub-frame candidate information and the scheduling information; and a control data detector that detects, for each sub-frame, the control data including the items corresponding to the type indicated by the result of the determination by the frame-type determining unit. Accordingly, the processing load on reception of control data is reduced.05-05-2011

Daiichiro Nakashima, Chiba JP

Patent application numberDescriptionPublished
20100074159POSITION MANAGING DEVICE, MOBILE STATION DEVICE, BASE STATION DEVICE, FREQUENCY LAYER CONTROL METHOD, PROGRAM, AND RECORDING MEDIUM - In a mobile communication system, it is possible to improve the frequency use efficiency of the entire communication system and effectively execute base station control of used frequency layer for a particular mobile station. The present invention can be applied to a multimedia broadcast/multicast service (MBMS) mobile communication system having different frequency layer reception capability. A position managing device (aGW) decides an information transmission frequency layer to a frequency position and/or idle mode mobile station device which provides the MBMS in accordance with MBMS desire information as an index of the MBMS transmission frequency layer control. A mobile station device (UE) receives MBMS and an idle mode mobile station device with the frequency layer specified by aGW.03-25-2010
20100220668BASE STATION DEVICE, MOBILE STATION DEVICE, MOBILE STATION IDENTIFIER ALLOCATION METHOD, PROGRAM, AND RECORDING MEDIUM - It is possible to effectively control information on allocation of a radio resource for each mobile station, improve the frequency use efficiency of the entire communication system, and effectively execute base station/mobile station control. A mobile station holds a Chunk Table (TB) in advance (S09-02-2010

Daiichiro Nakashima, Osaka-Shi JP

Patent application numberDescriptionPublished
20090316643BASE STATION DEVICE, MOBILE STATION DEVICE, CONTROL INFORMATION TRANSMISSION METHOD, CONTROL INFORMATION RECEPTION METHOD AND PROGRAM - In a radio system which allocates resources using as units resource blocks which are formed by frequency components and time components, control information for mobile station devices, and identification information which is used to identify a format for a control information transmission channel which transmits the control information is transmitted from the base station device to the mobile station devices by means of the control information transmission channel.12-24-2009
20090318158BASE STATION DEVICE, MOBILE STATION DEVICE, CONTROL INFORMATION TRANSMISSION METHOD, CONTROL INFORMATION RECEPTION METHOD AND PROGRAM - In a radio system which allocates resources using as units resource blocks which are formed by frequency components and time components, control information for mobile station devices, and identification information which is used to identify a format for a control information transmission channel which transmits the control information is transmitted from the base station device to the mobile station devices by means of the control information transmission channel.12-24-2009
20090323622BASE STATION DEVICE, MOBILE STATION DEVICE, CONTROL INFORMATION TRANSMISSION METHOD, CONTROL INFORMATION RECEPTION METHOD AND PROGRAM - In a radio system which allocates resources using as units resource blocks which are formed by frequency components and time components, control information for mobile station devices, and identification information which is used to identify a format for a control information transmission channel which transmits the control information is transmitted from the base station device to the mobile station devices by means of the control information transmission channel.12-31-2009
20100016005COMMUNICATION TERMINAL APPARATUS, COMMUNICATION CONTROL APPARATUS, WIRELESS COMMUNICATION SYSTEMS, AND RESOURCE ALLOCATION REQUEST METHOD - A communication terminal apparatus requests resource allocation to a communication control apparatus without allocating any dedicated resource for resource request. The communication terminal apparatus is applied to a wireless communication system in which the communication control apparatus allocates resources used when a communication terminal apparatus 01-21-2010
20100042887BASE STATION DEVICE, MOBILE STATION DEVICE, CONTROL INFORMATION TRANSMISSION METHOD, CONTROL INFORMATION RECEPTION METHOD AND PROGRAM - In a radio system which allocates resources using as units resource blocks which are formed by frequency components and time components, control information for mobile station devices, and identification information which is used to identify a format for a control information transmission channel which transmits the control information is transmitted from the base station device to the mobile station devices by means of the control information transmission channel.02-18-2010
20110136528COMMUNICATION TERMINAL APPARATUS, COMMUNICATION CONTROL APPARATUS, WIRELESS COMMUNICATION SYSTEM, AND RESOURCE ALLOCATION REQUEST METHOD - A communication terminal apparatus requests resource allocation to a communication control apparatus without allocating any dedicated resource for resource request. The communication terminal apparatus is applied to a wireless communication system in which the communication control apparatus allocates resources used when a communication terminal apparatus 06-09-2011

Patent applications by Daiichiro Nakashima, Osaka-Shi JP

Daiichiro Nakashima, Chiba-Shi JP

Patent application numberDescriptionPublished
20090137237WIRELESS COMMUNICATION SYSTEM, BASE STATION DEVICE, MOBILE STATION DEVICE, AND MACRODIVERSITY SELECTION METHOD - A wireless communication system, a base station device, a mobile station device, and a macrodiversity selection method of the invention, in a base station device including a macrodiversity function among a plurality of sectors, select a macrodiversity method for the mobile station device from a plurality of macrodiversity methods, in accordance with a predetermined determination reference based on reception conditions of the mobile station device.05-28-2009
20090168923MULTICARRIER-SIGNAL RECEIVING APPARATUS AND MULTICARRIER-SIGNAL TRANSMITTING APPARATUS - A multicarrier-signal receiving apparatus includes: a Fourier-transformer that performs a Fourier transform, on reception signals to extract subcarriers; a channel estimator that performs channel estimation on one of the extracted subcarriers using channel estimation symbols included in a subcarrier group to which the one of the extracted subcarriers belongs, the subcarrier group including subcarriers to which an identical phase rotation is added upon transmission; and a channel compensator that performs channel compensation on data symbols included in the one of the extracted subcarriers using a result of the channel estimation performed by the channel estimator on the one of the extracted subcarriers.07-02-2009
20090209256MOBILE COMMUNICATION SYSTEM, AND MOBILE UNIT, BASE STATION UNIT AND METHOD THEREFORE - In mobile communication system having a plurality of mobile traits and a plurality of base station units, the system of the present invention is characterised in that the base station unit has a gap period length setting section for setting the length of the gap period for the mobile unit depending on the type of the radio access technology to be monitored by the mobile unit.08-20-2009
20090257421WIRELESS COMMUNICATION SYSTEM, MOBILE STATION DEVICE, AND RANDOM ACCESS METHOD - A wireless communication system includes a base station device and a mobile station device that tries a random access to the base station device. The mobile station device determines an upper limit of a random backoff time representing an interval from when the random access fails to when another random access is retried based on a relationship between the mobile station device and the base station device.10-15-2009