Abstract:
Un aparato terminal (200) para realizar una realimentación de ACK/NACK en un sistema de TDD que implica agregación de portadoras, el aparato terminal que comprende: una sección de recepción (201) configurada para recibir unos datos de enlace descendente transmitidos usando una pluralidad de portadoras componentes incluyendo una Celda Primaria y una Celda Secundaria, en donde la Celda Primaria y la Celda Secundaria tienen patrones de configuración de UL/DL diferentes que definen temporizaciones de transmisión de una o más subtramas de enlace ascendente, una o más subtramas de enlace descendente y una o más subtramas especiales dentro de una trama; una sección de generación de señal de respuesta (212) configurada para realizar la detección de error de los datos de enlace descendente para cada una de la Celda Primaria y la Celda Secundaria y para generar una señal de respuesta que indica los resultados de la detección de error de los datos de enlace descendente; y una sección de transmisión (222) configurada para transmitir la señal de respuesta sobre una subtrama de enlace ascendente de la Celda Primaria, la subtrama de enlace ascendente que se define en la misma temporización que una temporización de transmisión de la una o más subtramas de enlace ascendente definidas por el patrón de configuración para la Celda Secundaria, caracterizado por que las temporizaciones de transmisión de todas de la una o más subtramas de enlace ascendente definidas por el patrón de configuración para la Celda Secundaria están dentro de un conjunto de temporizaciones de transmisión de una o más subtramas de enlace ascendente definidas por el patrón de configuración para la Celda Primaria.
Abstract:
Disclosed are an encoding ratio setting method and a radio communication device which can avoid encoding of control information at an encoding ratio lower than necessary and suppress lowering of the transmission efficiency of the control information. In the device, an encoding ratio setting unit (122) sets the encoding ratio R’
Abstract:
A wireless communication terminal apparatus wherein even in a case of performing a wideband transmission using only a downstream line, CCE assignment can be flexibly performed without any collisions of ACK and NACK signals among a plurality of unit bands. In a wireless communication terminal apparatus (200) using a plurality of downstream unit bands to perform communications, a PDCCH receiving unit (207) blind-decodes CCE in a search space of the plurality of downstream unit bands, thereby acquiring resource assignment information of downstream line data addressed to the wireless communication terminal apparatus (200), and a modulating unit (209) modulates a response signal, which is responsive to the downstream line data in particular downstream unit bands, based on a modulation scheme in which the number of modulation multi-values corresponds to the number of those particular ones of the plurality of downstream unit bands in which the resource assignment information addressed to the wireless communication terminal apparatus (200) is assigned to CCE of the same CCE number.
Abstract:
A transmission method in time-division relay, using a common transmission format to transmit a control signal for each relay station apparatus; and a base station apparatus of the same. A base station apparatus maps the control signal for relay station apparatuses in the (D+1)th OFDM symbol inside a subframe, wherein D is the maximum number of OFDM symbols in which control signals for mobile station apparatuses are mapped, said control signals being transmitted from the base station apparatus to mobile station apparatuses under the control of the base station apparatus.
Abstract:
Provided is a radio communication terminal which is capable of measuring quality in communication with a handover destination with high accuracy. The radio communication terminal is capable of communicating with a base station or a relay node, and includes: a receiver which receives control information including information relating to measurement of measuring quality of a neighbor cell; an extractor which extracts information on a subframe where the measurement should be performed, which is a subframe where only transmission of a signal from the relay node connected to the base station is performed, from the information relating to the measurement; a measurement section which performs the measurement, on a subframe basis, based on the extracted information on the subframe where the measurement should be performed; and a transmitter which transmits a result of the measurement to the base station or the relay node.
Abstract:
A wireless communication base station apparatus which is able to prevent deterioration in the throughput of LTE terminals even when LTE terminals and LTE+ terminals coexist. In this apparatus, based on the mapping pattern of the reference signals used only in LTE+ terminals, a setting unit (105) sets, in each subframe, the resource block groups where the reference signals used only by the LTE+ terminals are mapped. For symbols mapped to the antennas (110-1 to 110-4), an mapping unit (106) maps, to all the resource blocks within one frame, cell specific reference signals used for both LTE terminals and LTE+ terminals. For the symbols mapped to the antennas (110-5 to 110-8), the mapping unit (106)maps, to the plurality of resource blocks, of which part of the resource block groups is comprised, in the same subframe within one frame, the cell specific reference signals used only for LTE+ terminals, based on the setting results inputted from the setting unit (105).
Abstract:
It is possible to provide a radio transmission device and a radio transmission method which can avoid degradation of a channel estimation accuracy using a reference signal formed by a ZC sequence even when the RS transmission band of a local cell is different from that of an adjacent cell. A mobile station decides a cyclic shift sequence corresponding to RB allocation information from an RS table which correlates different frequency bandwidths from a reference point of respective transmission bands to a spectrum start number of the cyclic shift sequence so as to satisfy a particular relationship based on the sequence length and transmits the decided cyclic shift sequence as RS to a base station. The base station uses the same RS table as the RS table of the mobile station and performs correlation calculation of the RS transmitted from the mobile station, thereby performing channel estimation.