An uplink transmission band and a downlink transmission band that are allocated to each of a plurality of users are determined based on allocation information indicating allocation of a frequency bandwidth available to each of the plurality of users, and are output as uplink transmission band allocation information and downlink transmission band allocation information, respectively. Based on the downlink transmission band allocation information, downlink signals output from a plurality of wireless control devices toward a plurality of wireless devices for each of the plurality of users, and the uplink transmission band allocation information are multiplexed, and the multiplexed signal is demultiplexed into downlink signals for each of the plurality of users and the uplink transmission band allocation information. Based on the demultiplexed uplink transmission band allocation information, the uplink transmission band allocated to each of the plurality of users is changed, and uplink signals output from the plurality of wireless devices toward the plurality of wireless control devices for each of the plurality of users are multiplexed according to the changed uplink transmission band and then, the multiplexed signal is demultiplexed into the uplink signals for each of the plurality of users.

The present invention provides a base station apparatus, a terminal apparatus, and a communication method, which are capable of throughput improvement. A base station apparatus that communicates with a terminal apparatus, includes a higher layer processing unit that configures a CSI process that is a configuration relating to reporting of a channel state information (CSI), for the terminal apparatus for which a prescribed transmission mode is configured, in which the CSI process includes a configuration of a CSI reference signal and a configuration relating to two different code books. A terminal apparatus that communicates with a base station apparatus, includes a higher layer processing unit for which a CSI process that is a configuration relating to reporting of channel state information (CSI) is configured by the base station apparatus, and a transmission unit that transmits the CSI based on the CSI process, in which the CSI information includes a configuration of a CSI reference signal and a configuration relating to two different code books.

The present invention provides a base station apparatus, a terminal apparatus, and a communication method, which are capable of throughput improvement. A base station apparatus that communicates with a terminal apparatus, includes a higher layer processing unit that configures a CSI process that is a configuration relating to reporting of a channel state information (CSI), for the terminal apparatus for which a prescribed transmission mode is configured, in which the CSI process includes a configuration of a CSI reference signal and a configuration relating to two different code books. A terminal apparatus that communicates with a base station apparatus, includes a higher layer processing unit for which a CSI process that is a configuration relating to reporting of channel state information (CSI) is configured by the base station apparatus, and a transmission unit that transmits the CSI based on the CSI process, in which the CSI information includes a configuration of a CSI reference signal and a configuration relating to two different code books.

There are disclosed various methods and apparatuses for multi-vehicle maneuver and impact analyses. According to an embodiment, the apparatus comprises at least one processor and at least one memory including computer program code, the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus at least to: receive sensor data from at least one motion sensor associated with a selected vehicle from a plurality of vehicles, said sensor data indicating movements of the vehicle in a geographical area; obtain from the sensor data location of the vehicle in the geographical area; maintain a vehicle location and motion database having at least three grid layers of grid cells representing at least a part of the geographical area, said grid cells of the at least three grid layers being partly overlapping so that borders of the grid cells of different grid layers have an offset between each other; map the location of the vehicle to a grid cell of each grid layer into which the location of the vehicle belongs; insert or maintaining an identifier of the vehicle in a list of vehicle identifiers for the mapped grid cell of each grid layer; and determine on the basis of the identifiers of the vehicles in the lists which other vehicles are in a proximity of said selected vehicle.

When a plurality of the subcarrier spacing values are applied, a reference signal is generated by using a sequence having a sequence length corresponding to a first ratio of a first subcarrier spacing set for transmission data to the maximum settable subcarrier spacing. The sequence of the reference signal is mapped to a frequency resource at mapping intervals in accordance with a second ratio which is the reciprocal of the first ratio, and the transmission data and the reference signal are transmitted.

A radio transmission apparatus selects any one group from a plurality of groups each indicating a combination of a plurality of radio reception apparatuses, notifies at least a plurality of radio reception apparatuses belonging to the selected group of an identification number assigned in advance to the selected group, and allocates transmission data addressed to the radio reception apparatuses belonging to the selected group to each of a plurality of frequency resources based on order of the radio reception apparatuses, which is determined in advance in the selected group.

A radio transmission apparatus selects any one group from a plurality of groups each indicating a combination of a plurality of radio reception apparatuses, notifies at least a plurality of radio reception apparatuses belonging to the selected group of an identification number assigned in advance to the selected group, and allocates transmission data addressed to the radio reception apparatuses belonging to the selected group to each of a plurality of frequency resources based on order of the radio reception apparatuses, which is determined in advance in the selected group.

A terminal apparatus and a communication method are provided. The terminal apparatus communicates with a base station apparatus. The terminal apparatus includes a receiver and a measurement unit. The receiver is configured to receive downlink signals and configuration information in a first component carrier and a second component carrier. The measurement unit is configured to calculate Channel State Information (CSI) of the first component carrier and the second component carrier. In a case that spatial Quasi-coloration (QCL) for reception parameters is configured between the first component carrier and the second component carrier in the configuration information, the CSI of the first component carrier and the CSI of the second component carrier are calculated with a same reception parameter.

An optical transmission system includes: first and second optical transmitting units for respectively transmitting first and second optical signals that are obtained, respectively, as a result of first and second frequency-multiplexed multi-channel signals being converted by means of FM batch conversion; a carrier monitoring function unit for monitoring each carrier signal included in the optical signals; an output adjustment unit for adjusting signal intensities of the optical signals and outputting the optical signals; a multiplexer for outputting a multiplexed signal of the optical signals; an amplifier for amplifying the multiplexed signal; and first and second optical receiving units for receiving the respective optical signals included in the amplified multiplexed signal. The output adjustment unit adjusts the respective signal intensities of the optical signals such that the signal intensity at each optical receiving unit is larger than or equal to a predetermined value. The carrier monitoring function unit updates the predetermined values based on a minimum optical sensitivity that is calculated based on the amount of frequency deviation of each carrier signal included in the optical signals.

Provided is a communication apparatus including a communication unit that receives frames including first information from a plurality of other communication apparatuses and transmits first frames including information indicating a first transmission time period to the plurality of other communication apparatuses, a control unit that determines the first transmission time period on the basis of the plurality of pieces of first information, and a processing unit that generates the first frames.