Patent application number | Description | Published |
20080232517 | Radio communications system, receiver and receiving method - A mobile station obtains information indicating a system band to be employed from a base station before starting a process of identifying a base station ID. In the identification process, the mobile station obtains a cross-correlation value by coherent integration of pilot signals and scrambling codes which may be candidates by using a synchronization signal as a phase reference, in a channel band for synchronization, and obtains a cross-correlation value by non-coherent integration of the pilot signals and the scrambling codes by using a phase difference between sub-carriers in a frequency direction, in the system band other than the channel band for synchronization. Then, the mobile station merges these cross-correlation values, detects a scrambling code from which a maximum cross-correlation value can be obtained, and identifies the base station ID. | 09-25-2008 |
20080310544 | Digital communications system - In a base station, after CRC is added to transmission data as a detection code, the transmission data is subjected to error-correcting coding using a convolutional code based on tail biting, divided into four frames of P-BCH and transmitted. For this reason, at a mobile station, even if reception (synthesis) is started from any frame of P-BCH represented as (b- | 12-18-2008 |
20090011764 | Mobile communications system and mobile radio terminal - Mobile station notifies base station of identification information of base stations searched by searching as a search list, and the base station notifies the mobile station of base stations which are not regarded as prestored neighbor base stations and base stations which are in an unusable base station list, of the base stations in the notified search list, as an NG list. If necessity of handover is increased, the mobile station receiving the notification executes handover to base stations (for example, base station) in the search list other than the base stations included in the NG list. | 01-08-2009 |
20090170442 | MOBILE RADIO TERMINAL AND MOBILE COMMUNICATION SYSTEM - Each of a mobile station and a base station stores a Wideband CQI table and a Subband CQI table. At the mobile station, a control unit transmits a CQI report value indicating Wideband CQI, and an index (Index S) indicating a differential value of a Diff reference value based on the CQI report value and Subband CQI, on the basis of the tables. In addition, the control unit makes the Diff reference value variable to prevent an expression amount of the index from being damaged if the Wideband CQI report value is in a range close to an upper lit or a lower limit of the Wideband CQI table. | 07-02-2009 |
20090170500 | RADIO APPARATUS AND RADIO COMMUNICATION METHOD - A controller selects M resource blocks having most preferable CQI values from Ncqi resource blocks on the basis of the reception signal qualities of the Ncqi resource blocks measured by a reception signal quality measuring unit. The controller then obtains the position information of the M resource blocks and the average of the M resource blocks, and outputs them as items of CQI information to a CQI channel generator. When performing best-effort data communication, the controller sets parameter M=Ma. When performing low-rate communication with a small delay, the controller sets parameter M=Mb (=Ncqi−Ma) to perform scheduling with a high degree of freedom. | 07-02-2009 |
20090190680 | MOBILE COMMUNICATION SYSTEM AND WIRELESS DEVICE - A base station transmits a control channel transmitted before information channels upon performing differential coding between control channels of adjacent frequencies. A terminal apparatus performs transmission path estimation on the basis of a pilot while decoding the control channel having undergone the differential coding. The information channels are decoded on the basis of information obtained by decoding the control channel and a transmission path estimation result on the pilot. | 07-30-2009 |
20090239524 | WIRELESS COMMUNICATION TERMINAL AND METHOD - A wireless communication terminal includes a measuring unit configured to measure each of channel qualities of resource blocks that a base station can allocate, a generating unit configured to divide the resource blocks into a plurality of groups, to generate quality data representing the channel qualities of a prescribed number of resource blocks included in each of the groups, which have relatively high channel quality, and to generate position data representing the positions which the resource blocks which have relatively high channel quality take in each of the groups, an encoding unit configured to encode the quality data and the position data to obtain encoded data, a modulation unit configured to modulate the encoded data to obtain a modulated signal, and a transmitting unit configured to transmit the modulated signal to the base station. | 09-24-2009 |
20100002678 | MOBILE RADIO TERMINAL AND RADIO COMMUNICATION METHOD - A transmitter executes the transmission using the synchronization signal in which a plurality of blocks formed of the synchronization code sequences different from each other are aligned in the order changed in the former part and the latter part while a receiver comprises the delay detection circuit corresponding to the delayed correlation base system and the replica base detection circuit corresponding to the replica base system corresponding to the synchronization signal, to execute the synchronization detection selectively in the replica base system or the delayed correlation base system. | 01-07-2010 |
20100002782 | RADIO COMMUNICATION SYSTEM AND RADIO COMMUNICATION METHOD - In an OFDM cellular system, a power density of a phase reference signal of a time frame used in an initial synchronization process (time frame including a system information notification signal, or a time frame in the vicinity thereof), in a channel band for initial synchronization, is more increased than that of the other time frame. | 01-07-2010 |
20100027492 | WIRELESS BASE STATION APPARATUS AND MOBILE WIRELESS TERMINAL APPARATUS - In the downlink, the channel band at each end of three 20-MHz channel bands has the DC subcarrier at its center at a position spaced apart from the DC subcarrier of the middle channel band by 18.015 MHz or more and, more specifically, by 18.3 MHz corresponding to a spacing of 300 kHz that is the least common multiple of the 100-kHz channel raster and the 15-kHz subcarrier spacing. The subcarriers at the two ends are rearranged between the channel bands. | 02-04-2010 |
20100167660 | WIRELESS COMMUNICATION APPARATUS AND WIRELESS COMMUNICATION METHOD - A reception unit measures a reception power level of a reference signal which is received from a base station apparatus BS. A reception signal processing unit acquires information indicative of a transmission power level of the reference signal. A control unit finds a path loss on the basis of the reception power level and this information. The control unit determines, on the basis of the path loss, a transmission power level of that one of two transmission frequency bands, which is closer to a frequency band with respect to which the pass loss has been measured. The control unit determines a transmission power level of the other transmission frequency band, which is farther from the frequency band with respect to which the pass loss has been measured, by correcting the transmission power level on the basis of a correction value based on a difference in frequency. | 07-01-2010 |
20100226320 | WIRELESS TRANSMISSION APPARATUS, WIRELESS RECEPTION APPARATUS, AND TRANSMISSION METHOD - A wireless se station notifies a mobile wireless terminal of type y of LTE-A of the assignment information of a representative channel (PDSCH) via a PDCCH, as in a mobile wireless terminal of type x of Rel-8 LTE, and notifies the terminal of the remaining assigned channels (PDSCHs) via a region (D) of the notified representative channel. | 09-09-2010 |
20100232375 | WIRELESS TRANSMISSION APPARATUS, WIRELESS RECEPTION APPARATUS, AND TRANSMISSION METHOD - A wireless base station apparatus assigns channels to a narrowband mobile wireless terminal apparatus of type x (Rel-8 LTE) within the range of one component as its standard and assigns, to a broadband mobile wireless terminal apparatus of type y (LTE-A), channels not only within the range of one component but also channels in other components or between components. | 09-16-2010 |
20100238873 | WIRELESS TRANSMISSION APPARATUS, WIRELESS RECEPTION APPARATUS, AND WIRELESS COMMUNICATION METHOD - A wireless base station apparatus notifies a mobile wireless terminal apparatus of a channel to be used to transmit a response signal of channel assignment by a mapping pattern of channel assignment information transmitted on a plurality of bands. | 09-23-2010 |
20100311357 | RADIO COMMUNICATION APPARATUS AND RADIO COMMUNICATION METHOD - When SRS serving as a base of CSI measurement at a base station apparatus is transmitted from each of two antennas, a control unit controls resource element mappers to make the SRS orthogonal to each other or identical with each other in terms of frequency or code between the two antennas, in accordance with use of CSI at a base station apparatus. | 12-09-2010 |