摘要:
The present invention is designed such that, when a user terminal performs radio communication using a plurality of serving cells of different component carriers, it is possible to flexibly report aperiodic channel state information of a serving cell required on the network side among the plurality of serving cells. A radio base station apparatus transmits an uplink scheduling grant, which includes an identification field that identifies an uplink serving cell where an uplink shared channel is allocated among a plurality of uplink serving cells and a request field that requests reporting of aperiodic channel state information from a user terminal, to the user terminal, via a downlink control channel, and the user terminal reports aperiodic channel state information of a downlink serving cell that is designated by a combination of the identification field and the request field, to the radio base station apparatus, via the uplink shared channel.
摘要:
The present invention is designed to reduce interference from a macro base station to a small transmission power node. The present invention is characterized in providing a micro base station which forms, in a macro cell where a macro base station transmits a signal to a macro terminal, a micro cell where the micro base station transmits a signal to a micro terminal under control with low power, and this micro base station generates a PDCCH which includes downlink or uplink resource allocation information, and, in a non-transmission period in which the macro base station stops transmitting signals while leaving minimal quality measurement signals, shifts the transmission starting symbol of the PDCCH to a position where the PDCCH does not overlap the quality measurement signals.
摘要:
To prevent a situation that communication operation becomes unstable resulting from erroneous detection of a PDCCH in a mobile communication system having a system band comprised of a plurality of base frequency blocks, in a mobile terminal apparatus (10) provided with a downlink control signal decoding section (104) configured to determine radio resources designated by ARI (ACK/NACK Resource Indicator) fields of PDSCHs assigned to a plurality of base frequency blocks (CCs), and a retransmission response signal transmission control section (105) configured to control transmission of retransmission response signals in response to PDSCHs assigned to a plurality of base frequency blocks (CCs) based on the radio resources designated by the ARI fields, the retransmission response signal transmission control section (105) limits transmission of retransmission response signals in response to PDSCHs assigned to all the base frequency blocks (CCs) when the radio resources designated by a plurality of the ARI fields include a different radio resource.
摘要:
It is an object of the present invention to adequately report the SRS transmission timing and SRS parameters to a mobile terminal apparatus, when an aperiodic SRS is adopted, and efficiently use radio resources to be used for SRS transmission. A radio base station apparatus that reports SRS transmission control information to a mobile terminal apparatus and controls transmission of an SRS by the mobile terminal apparatus, and the radio base station apparatus has an SRS setting section that selects bit information to report to the mobile terminal apparatus, from a table having bit information to indicate not to trigger the SRS and bit information to indicate to trigger the SRS using a default SRS parameter, and a reporting section that reports the bit information for the mobile terminal apparatus using a downlink control channel.
摘要:
A mobile terminal apparatus and a radio communication method are provided which can efficiently transmit feedback control information through a physical uplink control channel. The radio communication method according to the present invention uses a plurality of ACK/NACK control bits as data signals, adds cyclic shifts to a plurality of reference signal blocks of a plurality of time blocks in a physical uplink control channel format comprised of a plurality of time blocks, multiplies the plurality of reference signal blocks by orthogonal codes and transmits a control channel signal including reference signals by which orthogonal codes are multiplied to a radio base station apparatus through a physical uplink control channel.
摘要:
In order to implement optimal CFI control under a cross-carrier scheduling environment and improve PDSCH transmission efficiency, for the MACRO_UE2 where the cross-carrier scheduling is employed, the PDSCH initiation position of CC1 that is used to transmit PDCCH is dynamically controlled, and the PDSCH initiation position of CC2 that is not used to transmit PDCCH is quasi-statically controlled. For the PICO_UE2 where the cross-carrier scheduling is employed, the PDSCH initiation position of CC2 that is used to transmit PDCCH is dynamically controlled, and the PDSCH initiation position of CC1 that is not used to transmit PDCCH is dynamically controlled.
摘要:
In order to reduce radio resources allocated to PDCCHs and improve the data rate even when a plurality of component carriers are aggregated into a wide band, the present invention provides a base station apparatus having: a downlink control information generation section (306) configured to generate downlink control information (DCI) to demodulate PDSCHs that are sent independently in respective component carriers (CCs) allocated to a user terminal; and a transmitting section configured to transmit a PDCCH containing the downlink control information (DCI). The downlink control information (DCI) generated by the downlink control information generation section (306) is added with identification information (CIF) that is used to demodulate the PDSCHs assigned to the component carriers and is capable of identifying each of the component carriers.
摘要:
The present invention provides a search space configuration that is suitable for a communication system in which a plurality of fundamental frequency blocks are grouped together into a wide band. A base station apparatus (20) has a selection section (302) that selects a system band in fundamental frequency block units, a downlink control information generation section (306) that generates downlink control information for demodulating the data channels that are sent separately in the selected fundamental frequency blocks, and arranges, in the downlink control channel of a specific fundamental frequency block among a plurality of fundamental frequency blocks, a search space in which downlink control information for the plurality of fundamental frequency blocks is contained, and a transmission section (203) that transmits the downlink control channel in which the search space with the downlink control information is arranged.
摘要:
A base station apparatus having a control information generation section that generates, per fundamental frequency block, a downlink control information piece for demodulating a data channel that is transmitted for each of a plurality of fundamental frequency blocks assigned to a user terminal, a determining section that determines, per fundamental frequency block, a search space which is a candidate area where the downlink control information piece is arranged, and a transmission section that transmits a downlink control channel in which the search space containing the downlink control information piece is arranged is disclosed. The control information generation section arranges respective downlink control information pieces corresponding to the fundamental frequency blocks in a downlink control channel of a specific fundamental frequency block among the fundamental frequency blocks, and the determining section distributes positions of search spaces such that the search spaces are separate between fundamental frequency blocks and between user terminals.
摘要:
Provided is a downlink reference signal structure suitable for increase in number of transmission layers. A radio base station device (20) has a plurality of transmission antennas; a orthogonal RS sequence generator (22) for generating orthogonal reference signals based on a two-dimensional orthogonal code, the orthogonal reference signals being orthogonalized between downlink reference signals adjacent in two-dimensional directions of frequency direction and time direction to each other in one transmission layer and being orthogonalized in different transmission layers assigned to one radio resource; a multiplexer (23) for multiplexing transmission data and the orthogonal reference signals in the one transmission layer; and a transmitter for transmitting a transmission signal obtained by multiplexing the transmission data and the orthogonal reference signals, via the transmission antenna in transmission layers simultaneously.