摘要:
To provide a radio base station apparatus and radio communication method capable of performing radio communications using downlink reference signal structures suitable for antenna virtualization, a radio base station apparatus (200) has a plurality of transmission antennas, generates CRSs used in demodulation of at least downlink control information, CQI-RSs generated for each of the transmission antennas used in measurement of channel quality, and DM-RSs generated for each stream used in demodulation of downlink transmission data, and multiplexes the CRSs, CQI-RSs and DM-RSs into a same transmission time unit to transmit from each of the antennas.
摘要:
A base station comprises a receiving unit configured to receive a shared control channel assigned to a channel band where a plurality of frequency blocks each of which includes a plurality of subcarriers are arranged in a frequency direction, and to receive a shared data channel assigned to at least one of the frequency blocks of the channel band; and a processing unit configured to process the shared control channel and the shared data channel which are received by the receiving unit. Assignment for the shared control channel received by the receiving unit is performed so as to form a comb-shaped spectrum, and assignment for the shared data channel received by the receiving unit is performed so as to form a continuous spectrum, and scheduling is performed for the shared control channel irrespective of channel status, and scheduling is performed for the shared data channel according to channel status. Continuous frequency blocks are used for the shared data channel received by the receiving unit when the shared data channel is assigned to equal to or greater than two frequency blocks.
摘要:
A transmitter comprises a generation unit generating a frame, which includes a plurality of OFDM symbols; and a transmission unit transmitting the generated frame, wherein the generation unit arranges a primary synchronization channel for detecting a symbol timing at an end OFDM symbol of the frame and a secondary synchronization channel for detecting a reception frame at an OFDM symbol preceding the end OFDM symbol, and the generation unit further arranges a cyclic prefix at each of the plurality of OFDM symbols and applies any of specified different cyclic prefix lengths.
摘要:
A transmission apparatus used in a mobile communication system adopting a single carrier scheme in an uplink includes: multiplexing means configured to multiplex a pilot channel, a control channel, and a data channel; and transmission means configured to transmit a transmission symbol including at least the pilot channel and the control channel using the uplink. A first pilot channel used for a reception apparatus to measure channel state of the uplink is transmitted using a frequency band over a plurality of resource blocks. A second pilot channel for compensating for a channel transmitted by the uplink is transmitted by a resource block assigned to the transmission apparatus. Control channels of the transmission apparatus and the apparatus other than the transmission apparatus are orthogonalized with each other by a FDM scheme.
摘要:
A base station apparatus performing communication in a communication system in which a plurality of types of bandwidths are defined comprises a transmission unit and a multiplexing unit. The transmission unit is configured to transmit transmission data by using a bandwidth of the plurality of types of bandwidths in a band centered on a predetermined center frequency. The multiplexing unit is configured to multiplex a control channel into a center band of a predetermined width including the center frequency of the band used in the transmission unit irrespective of the bandwidth used in the transmission unit.
摘要:
A transmitter includes: a data modulation and channel coding unit configured to perform data modulation and channel coding for a data channel with a modulation level and a channel coding rate updated for each transmission time interval; a multiplexing unit configured to multiplex a control channel and the data channel for each transmission time interval; and an adjusting means configured to adjust a length of the transmission time interval. Increasing a unit of information transmission in the time direction and/or the frequency direction depending on communication conditions can reduce a frequency of inserting (allocating) the control channel, and can improve data transmission efficiency.
摘要:
The present invention relates to a base station for generating and transmitting system information to a mobile station. The present invention also relates to a communication method of communicating system information in a communication system including the base station and the mobile station. The base station generates system information; categorizes the system information into multiple pieces of system information; multiplexes the categorized multiple pieces of system information into multiple channels or multiple blocks; and transmits the system information on the multiple channels or the multiple blocks. The mobile station receives system information included in a portion of the multiple channels or the multiple blocks.