Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: Each of a general chunk to which pilot signals are allocated at a general density, and a high-density chunk to which pilot signals are allocated at a higher density than the density of the general chunk, is transmitted in a frequency band common to OFDM transmitters. Each of the OFDM transmitters allocates the high-density chunk to any one of OFDM receivers, which notifies poor receiving quality.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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-1) to (b-4), a cyclic structure of the transmission signal is maintained due to the tail biting and reception data shifted by unit of frame can be obtained. For this reason, at the mobile station, even if a leading frame is unknown, decoding can be executed by one-time error-correcting decoding. A result of the decoding is subjected to CRC detection in four frame timings, the leading frame is detected and the transmission data is restored.

Abstract: 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.

Abstract: In step 5a, a mobile-station measures a reception level and an interference level with the other base-stations, for a base-station considered as a communication partner. In step 5b, the mobile-station transmits a measurement result obtained in step 5a as control information to the base-station considered as the communication partner. In step 5c, the base-station determines a transmission format in a transmission format candidate group used for the transmission to the mobile-station, on the basis of the control information, etc.

Abstract: A mobile station measures channel variation in a time direction and channel variation in a frequency direction, and selects a CQI compression method to be actually applied, on the basis of a CQI updating cycle, a CQI channel size, the channel variation in the time direction and the channel variation in the frequency direction transmitted from a base station. The mobile station notifies the base station of CQI format information associated with the selected CQI compression method together with a measured CQI value. On the basis of the CQI format information, the base station analyzes in what compression method the CQI value is compressed, and executes scheduling in accordance with a result of the analysis.

Abstract: On the basis of control information for CQI transmission of which a base station notifies a mobile station, the mobile station transmits CQI information for each sub-frame in a case of best effort type service or transmits the base station the CQI information at one time for every four sub-frames in a case of rate preservation type service.

Abstract: A wireless control apparatus which performs a wireless communication with a plurality of wireless terminals, comprising: an evaluation signal receiver configured to receive evaluation signals relating to received signals in the respective wireless terminals, which are transmitted from the plurality of wireless terminals; a supplement signal deciding unit which decides a supplement signal necessary to supplement the received signals in the plurality of wireless terminals; and a supplement signal transmitter configured to transmit the supplement signal decided by the supplement signal deciding unit, to the plurality of wireless terminals.

Abstract: A wireless control apparatus which performs a wireless communication with a plurality of wireless terminals, comprising: an evaluation signal receiver configured to receive evaluation signals relating to received signals in the respective wireless terminals, which are transmitted from the plurality of wireless terminals; a supplement signal deciding unit which decides a supplement signal necessary to supplement the received signals in the plurality of wireless terminals; and a supplement signal transmitter configured to transmit the supplement signal decided by the supplement signal deciding unit, to the plurality of wireless terminals.