摘要:
To set an optimal transmission power control interval such that a base station apparatus properly receives signals from a mobile station, while exploiting fast scheduling and fast AMC, in this closed-loop transmission power control method, reception SINR and average interference level are measured in a signal received in uplink, a time period for averaging reception quality is determined corresponding to an overlapped size of a dynamic range of a base station apparatus that is a region of overlapping a first reception-allowable range depend on reception capability of the base station apparatus, with a second reception-allowable range, varying corresponding to the interference level, depend on the number of a modulation and coding scheme set, each set achieving required throughput, the reception SINR is averaged using the determined time period, and a TPC command indicative of uplink transmission power to be controlled in a terminal apparatus is generated using a difference value between the averaged reception SINR and target reception SINR, and is transmitted in downlink.
摘要:
A communications apparatus includes a receiving unit which receives a data channel for each predetermined transmission period; a determining unit which determines, for each data channel, acknowledgement information which indicates an acknowledgement or a non-acknowledgement; a generating unit which generates a control channel including the acknowledgement information; and a transmitting unit which transmits the control channel. For first and second data channels received during at least successive first and second transmission periods, the first and second acknowledgement information is provided. The second control channel which includes both the first and the second acknowledgement information which includes both the first and the second acknowledgement information is transmitted after a first control channel which includes the first acknowledgement information.
摘要:
A reception step receives a multicarrier signal containing subcarriers, at least one of which a synchronization signal is transmitted therein, multiplied only by a synchronization signal spreading code, a correlation detection step detects correlation values between the received multicarrier signal and replicas of the synchronization signal, and a timing detection step detects a FFT timing and a long code received timing according to the correlation values.
摘要:
A base station for communicating with a first user equipment terminal within a first system band and communicating with a second user equipment terminal within a second system band includes a first reference signal sequence generating unit configured to generate M types of reference signal sequences; a second reference signal sequence generating unit configured to generate N (N>M) types of reference signal sequences; a scheduling unit configured to allocate resource blocks to the first user equipment terminal and the second user equipment terminal; a signal multiplexing unit configured to multiplex the M types of reference signal sequences into the resource block for the first user equipment terminal and multiplex the N types of reference signal sequences into the resource block for the second user equipment terminal; and a transmitting unit configured to transmit signals including the M types of reference signal sequences and the N types of reference signal sequences.
摘要:
A base station includes: a first reception timing detecting unit configured to detect a reception timing of a packet received from a first mobile station of multiple mobile stations which is situated in a first sector; a second reception timing detecting unit configured to detect a reception timing of a packet received from a second mobile station of the multiple mobile stations which is situated in a second sector; a transmission timing determining unit configured to determine transmission timings of signals transmitted from the first mobile station and the second mobile station based on the reception timings detected by the first reception timing detecting unit and the second reception timing detecting unit; a control information generating unit configured to generate transmission timing control information for the first mobile station and the second mobile station based on the transmission timings; and a radio resource allocating unit configured to allocate orthogonal radio resources to the first mobile station and the second mobile station.
摘要:
A disclosed transmission apparatus comprises a switching portion that switches radio access methods; a frequency domain signal generation portion that allocates a radio resource to a spread chip sequence on which one of a fast Fourier transformation and a series/parallel conversion is performed in accordance with the switched radio accessed method, so as to generate a signal in a frequency domain; and a transmission signal generation portion that performs a fast inverse Fourier transformation on the signal in the frequency domain so as to generate a transmission signal.
摘要:
Multiple reference signal transmission bandwidths are defined for system frequency bands and hierarchical reference signal bandwidths are defined for each reference signal transmission bandwidth such that a reference signal bandwidth lower than a highest-order reference signal bandwidth is a division of a higher-order reference signal bandwidth. A base station stores reference signal bandwidth information indicating the hierarchical reference signal bandwidths for each system frequency band; broadcasts the reference signal bandwidth information corresponding to a reference signal transmission bandwidth used by the base station; sets a frequency hopping bandwidth for a reference signal; reports, to a user device, the frequency hopping bandwidth and a reference signal bandwidth as assigned reference signal transmission bandwidth information; sets a reference signal transmission frequency band within the frequency hopping bandwidth based on the reference signal bandwidth information and the assigned reference signal transmission bandwidth information; and receives the reference signal from the user device.
摘要:
A user apparatus for use in a mobile communications system is disclosed. The user apparatus includes a unit which determines, using acknowledgement information received from a communications counterpart, whether retransmission is required for a transmitted signal; and a unit which transmits, to the communications counterpart, a signal required to be retransmitted according to a round-trip delay (RTD) which is set for the user apparatus for retransmission control, wherein, the RTD of the user apparatus is arranged to be changed, when the user apparatus enters a region which uses an RTD shorter than the RTD set for the user apparatus to an integer multiple of the shorter RTD.
摘要:
A disclosed radio communications apparatus adaptively controls a modulation method and coding rate (MCS) of a data channel in accordance with received channel quality information (CQI). This apparatus includes a first data table indicating a first corresponding relationship of the MCS with respect to the CQI; a second data table indicating a second corresponding relationship of transmission power of a control channel with respect to the CQI; a first selection portion that accesses the first data table so as to select the MCS of the data channel in accordance with the received CQI; a second selection portion that accesses the second data table so as to select the transmission power of the control channel in accordance with the received CQI; and a transmission portion that transmits the data channel in accordance with the selected MCS and the control channel at the selected transmission power.
摘要:
A user equipment terminal estimates a channel state, encodes channel state information representing the estimated channel state, and transmits the channel state information over plural transmission time intervals. A base station apparatus receives the channel state information over plural transmission time intervals, decodes the channel state information, and assigns resources based on the channel state information. The present invention provides the user equipment terminal, the base station apparatus, and a channel state information communication method.