JP2012134787A - Mobile station device, communication system, communication method, and integrated circuit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a communication system constituting a plurality of mobile station devices and a base station device and being capable of controlling a transmission power of an uplink signal to allow the base station device to acquire information from the uplink signal transmitted from the mobile station device properly, and to realize more efficient communication system.SOLUTION: A mobile station device has: a first receipt acknowledgement response generation part generating a first receipt acknowledgement response to downlink data received from the base station device in a plurality of frequency domains and a plurality of time domains; a second receipt acknowledgement response generation part executing a logical operation to the at least two first receipt acknowledgement responses to generate at least one second receipt acknowledgement response; a parameter setting part setting a parameter value depending on the number of the first receipt acknowledgement responses to which the logical operation is performed; and a transmission part controlling a transmission power of a signal indicating a content of the second receipt acknowledgement response by using a parameter having the value that is set in the parameter setting part, and transmitting the signal indicating the content of the second receipt acknowledgement response.

Description

  The present invention controls a transmission power of an uplink signal in a communication system including a plurality of mobile station apparatuses and a base station apparatus, and the base station apparatus obtains information from an uplink signal transmitted from the mobile station apparatus. The present invention relates to a mobile station apparatus, a communication system, a communication method, and an integrated circuit that can be appropriately acquired.

  The evolution of cellular mobile radio access methods and networks (hereinafter referred to as “Long Term Evolution (LTE)” or “Evolved Universal Terrestrial Radio Access (EUTRA)”) is the third generation partnership project (3rd Generation Partnership Project: 3GPP). In LTE, an orthogonal frequency division multiplexing (OFDM) system, which is multicarrier transmission, is used as a communication system (downlink; referred to as DL) from a base station apparatus to a mobile station apparatus. . In LTE, a single-carrier transmission SC-FDMA (Single-Carrier Frequency Division Multiple Access) system is used as a communication system (uplink; referred to as UL) from a mobile station apparatus to a base station apparatus. Used. In LTE, a DFT-Spread OFDM (Discrete Fourier Transform-Spread OFDM) system is used as an SC-FDMA system.

  In 3GPP, a radio access method and a radio network (hereinafter referred to as “Long Term Evolution-Advanced (LTE-A)” or “Advanced Evolved”) that realizes higher-speed data communication using a frequency band wider than LTE. Universal Terrestrial Radio Access (A-EUTRA) ") is under study. In LTE-A, it is required to realize backward compatibility with LTE. A base station apparatus compatible with LTE-A communicates simultaneously with both mobile station apparatuses compatible with LTE-A and mobile station apparatuses compatible with LTE, and mobile stations compatible with LTE-A It is required for LTE-A to realize that the apparatus communicates with a base station apparatus compatible with LTE-A and a base station apparatus compatible with LTE. In order to realize this requirement, LTE-A is studying to support at least the same channel structure as LTE. A channel means a medium used for signal transmission. A channel used in the physical layer is called a physical channel, and a channel used in the media access (Media Access Control: MAC) layer is called a logical channel. Physical channel types include physical downlink shared channel (PDSCH) used for transmission / reception of downlink data and control information, and physical downlink control channel (Physical) used for transmission / reception of downlink control information. Downlink Control CHannel (PDCCH), Physical Uplink Shared Channel (PUSCH) used for transmission / reception of uplink data and control information, Physical Uplink Control Channel (Physical Uplink Control CHannel for transmission / reception of control information) : PUCCH), synchronization channel used for downlink synchronization establishment (Synchronization CHannel: SCH), physical random access channel (Physical Random Access CHannel: PRACH) used for establishment of uplink synchronization, downlink system Physical broadcast channel (Physica used for information transmission) l Broadcast CHannel (PBCH). A mobile station apparatus or a base station apparatus arranges and transmits a signal generated from control information, data, and the like on each physical channel. Data transmitted on the physical downlink shared channel or the physical uplink shared channel is referred to as a transport block.

  The control information arranged in the physical uplink control channel is referred to as uplink control information (UCI). Uplink control information is control information (acknowledgement: ACK) or negative acknowledgment (acknowledgment: NACK) for data arranged in the received physical downlink shared channel (acknowledgement: NACK), Alternatively, it is control information (Scheduling Request: SR) indicating an uplink resource allocation request, or control information (Channel Quality Indicator: CQI) indicating downlink reception quality (also referred to as channel quality).

  In LTE-A, a plurality of frequency bands having the same channel structure as LTE (hereinafter referred to as “component carrier (CC)”. Also referred to as element frequency bands) are used to provide one frequency band (broadband). (Frequency band aggregation; Spectrum aggregation, Carrier aggregation; Carrier aggregation, Frequency aggregation, etc.) are being studied. Specifically, in communication using carrier aggregation, a downlink physical channel is transmitted and received for each downlink component carrier (hereinafter, referred to as DL component carrier; DL CC), and an uplink component carrier is transmitted. The uplink physical channel is transmitted and received every time (hereinafter referred to as uplink component carrier; UL CC). That is, carrier aggregation is a technique in which a base station apparatus and a mobile station apparatus transmit and receive signals simultaneously on a plurality of physical channels using a plurality of component carriers in the uplink and the downlink.

  In LTE-A, a mode in which a base station apparatus communicates using an arbitrary frequency band is referred to as a “cell”. Carrier aggregation is communication by a plurality of cells using a plurality of frequency bands, and is also referred to as cell aggregation. In cell aggregation, a plurality of cells are defined as two different types of cells, one cell is defined as a primary cell (Primary Cell, Pcell), and the other cells are defined as secondary cells (Secondary Cell, Scell). The base station apparatus independently sets a primary cell and a secondary cell for each mobile station apparatus that uses cell aggregation. A primary cell is always composed of a set (combination) of one downlink component carrier and one uplink component carrier. The secondary cell is composed of at least one downlink component carrier, and may or may not be configured with an uplink component carrier. A component carrier used in the primary cell is referred to as a primary component carrier (Primary CC, PCC). A component carrier used in the secondary cell is referred to as a secondary component carrier (Secondary CC, SCC). In the primary cell and the secondary cell, data communication using the physical downlink shared channel and the physical uplink shared channel is performed in common, but other various processes are performed differently. Briefly, a plurality of processes are performed only in the primary cell and not performed in the secondary cell. For example, in the primary cell, acquisition of system information in the downlink, determination of radio link failure (RLF: Radio Link Failure), etc. are performed, execution of a random access procedure using a physical random access channel in the uplink, physical uplink Transmission / reception of uplink control information using the control channel is performed. Basically, all the processes performed in LTE that does not use cell aggregation are performed in the primary cell, and a plurality of processes other than data communication are not performed in the secondary cell.

  The mobile station apparatus transmits control information (reception confirmation response) indicating an acknowledgment or a negative response to data received using the physical downlink shared channel, using the physical uplink control channel. The base station apparatus performs retransmission control of data transmitted to the mobile station apparatus using the physical downlink shared channel based on the reception confirmation response received from the mobile station apparatus. In LTE-A using cell aggregation, a base station apparatus can transmit data to a mobile station apparatus simultaneously using a plurality of physical downlink shared channels. A mobile station apparatus that receives a plurality of physical downlink shared channels using cell aggregation needs to simultaneously notify a base station apparatus of a plurality of reception confirmation responses. In LTE, a base station apparatus can only transmit data to a mobile station apparatus using only one physical downlink shared channel at the same time, and has received one physical downlink shared channel. Notifies the base station apparatus of one reception confirmation response using the physical uplink control channel. In LTE-A, introduction of a physical uplink control channel (referred to as PUCCH format 3) having a new signal configuration is being studied so that a mobile station apparatus transmits a plurality of acknowledgments to the base station apparatus. The introduction of a physical uplink control channel using the DFT-S-OFDM scheme has been studied (Non-Patent Document 1).

  In LTE-A, when a reception confirmation response is transmitted using PUCCH format 3, it is studied to linearly control transmission power according to the number of transport blocks received by a plurality of physical downlink shared channels. (Non-Patent Document 2). This is the transmission power that can be used for other physical channels while satisfying the required quality of the information (payload) of the transmission acknowledgment that is actually transmitted, while avoiding unnecessary increase in power consumption of the mobile station device Is performed in order to avoid unnecessary reduction of interference and to avoid unnecessary increase of interference.

  In TDD, the mobile station apparatus transmits a reception confirmation response to data received using a physical downlink shared channel of a plurality of downlink subframes in a single uplink subframe. In LTE-A, it is studied to apply Spatial bundling to PUCCH format 3 in TDD (Non-patent Document 3). In LTE-A, a base station apparatus applies spatial multiplexing of MIMO (Multi-Input Multi-Output) to a physical downlink shared channel, and spatially multiplexes a plurality of data on one physical downlink shared channel. It has been studied to transmit a signal including a plurality of multiplexed data to a mobile station apparatus. The mobile station apparatus transmits an acknowledgment of reception of a plurality of data on the physical downlink shared channel to which spatial multiplexing is applied in the uplink. Here, when the mobile station apparatus performs a logical product operation on a plurality of acknowledgments for data received on the same physical downlink shared channel is referred to as Spatial bundling. The mobile station apparatus performs processing for generating information of a smaller number of bits (for example, 1 bit) than before execution of the operation by performing an AND operation on a plurality of reception confirmation responses. The mobile station apparatus transmits a reception confirmation response that has been subjected to the AND operation to the base station apparatus through the physical uplink control channel. For example, when all of the plurality of reception confirmation responses are affirmative responses, the mobile station device generates one affirmative response as a result of the logical product operation and transmits it to the base station device. For example, when at least one negative response is included in the plurality of reception confirmation responses, the mobile station device generates one negative response as a result of the logical product operation and transmits the negative response to the base station device.

3GPP TSG RAN1 # 62bis, Xi’an, China, 11-15, October, 2010, R1-105116 “Final report of RAN1 # 62 meeting” 3GPP TSG RAN1 # 63, Jacksonville, USA, 15-19, November, 2010, R1-106020 “PUCCH Format 3 Transmission Power for DL CA” 3GPP TSG RAN1 # 63, Jacksonville, USA, 15-19, November, 2010, R1-105826 “Final report of RAN1 # 62bis meeting”

  For transmission power control when Spatial bundling is applied to PUCCH format 3, no suitable process has been established yet. Even when Spatial bundling is applied, it is necessary to realize a quality suitable for transmission / reception of a reception confirmation response as in the case where Spatial bundling is not applied. If the quality suitable for the information of the reception confirmation response is not realized, the base station apparatus cannot appropriately acquire the information of the reception confirmation response. When the base station apparatus erroneously determines that the reception confirmation response indicating an acknowledgment is actually a negative response, unnecessary retransmission of the physical downlink shared channel is caused, and the efficiency of the communication system is degraded. In addition, when the base station apparatus erroneously determines that the reception confirmation response indicating a negative response is an affirmative response, retransmission occurs in the upper layer, and there is a delay until the data is appropriately received by the mobile station apparatus. And proper data communication cannot be realized. Also, when Spatial bundling is applied, the number of received transport blocks and the number of information (payloads) of reception acknowledgments that are actually transmitted do not have a one-to-one relationship. Even when Spatial bundling is applied, if transmission power is linearly controlled according to the number of received transport blocks, unnecessarily high transmission power is used, and power consumption of the mobile station apparatus is unnecessarily increased. However, there is a problem in that the transmission power that can be used for other physical channels is unnecessarily reduced, the interference is unnecessarily increased, and as a result, the efficiency of the communication system may deteriorate. Also, the number of cells used in cell aggregation, the number of data transmitted in each cell, the configuration of the TDD downlink subframe, and the spatial bundling setting for each cell, information on the reception confirmation response actually transmitted Even if the number of (payloads) is the same, the number of transport blocks received may be different, and the effect of the base station device not being able to properly acquire the information on the acknowledgment is constant There was a problem that was not.

  The present invention has been made in view of the above points, and an object of the present invention is to control uplink signal transmission power in a communication system including a plurality of mobile station apparatuses and base station apparatuses, and The present invention relates to a mobile station apparatus, a communication system, a communication method, and an integrated circuit that can appropriately acquire information from an uplink signal transmitted from the mobile station apparatus and realize a more efficient communication system.

  (1) In order to achieve the above object, the present invention takes the following measures. That is, the mobile station apparatus of the present invention is a mobile station apparatus that transmits a signal to a base station apparatus, and is a first for downlink data received from the base station apparatus in a plurality of frequency domains and a plurality of time domains. A first reception confirmation response generation unit that generates a reception confirmation response and a logical operation on at least two or more first reception confirmation responses to generate at least one second reception confirmation response A second reception confirmation response generating unit, a parameter setting unit for setting a parameter value according to the number of the first reception confirmation responses for which a logical operation has been performed, and contents of the second reception confirmation response. A transmission unit that controls a transmission power of a signal to be indicated using a parameter having a value set by the parameter setting unit and transmits a signal indicating the content of the second reception confirmation response.

  In this way, a parameter value related to transmission power is set according to the number of first reception confirmation responses for which a logical operation is performed, and a plurality of second reception confirmation responses are set using the set parameter values. An efficient communication system can be realized by transmitting the second PUCCH by controlling the transmission power of the second PUCCH used for transmitting the signal generated from the information. The parameter value based on the PUCCH signal configuration is set according to the rate at which the first acknowledgment response information is compressed by the logical operation, and the parameter value related to transmission power is increased as the rate of compression increases. Effect when the base station apparatus 3 cannot appropriately acquire the information of the second reception confirmation response by setting the transmission power of the signal of the second PUCCH to a large value by setting a larger value Can be made relatively constant, and an efficient communication system can be realized. Specifically, as the rate at which the first reception confirmation response is compressed increases, the transmission power of the second PUCCH signal is set to a larger value, and the second reception confirmation response information can be appropriately acquired. The probability that the first acknowledgment is not compressed can be reduced as compared with the case where the rate at which the first acknowledgment is compressed is small, so that the unnecessary retransmission on the PDSCH occurs and the influence on the downlink system throughput is made relatively uniform. can do.

  (2) Further, in the mobile station apparatus of the present invention, the second reception confirmation response generation unit includes a plurality of first data for a plurality of downlink data that are spatially multiplexed in the same frequency domain and the same time domain. It is characterized in that a logical operation is performed on the reception confirmation response.

  In this manner, a logical operation is performed on a plurality of first reception acknowledgment responses for a plurality of PDSCH data that are spatially multiplexed in the same downlink component carrier and the same downlink subframe, that is, spatial bundling is performed. In the case of application, an efficient communication system can be realized by setting a parameter value related to transmission power according to the number of first reception acknowledgments to which Spatial bundling is applied.

  (3) In the mobile station apparatus of the present invention, the parameter setting unit further sets the parameter value according to the number of the second reception confirmation responses.

  As described above, the base station apparatus further sets the parameter value related to the transmission power according to the number of the generated second reception acknowledgments, so that the base station apparatus can detect the uplink signal transmitted from the mobile station apparatus. It is possible to appropriately acquire information and avoid unnecessary use of high transmission power. As a result, it is possible to avoid an unnecessary increase in power consumption of the mobile station apparatus, an unnecessary increase in interference, and a possibility that the uplink efficiency of the communication system deteriorates. Can be avoided.

  (4) Further, in the mobile station apparatus of the present invention, the parameter setting unit sets parameters according to the number of the first reception confirmation responses for which a logical operation has been performed, and sets the second reception confirmation response. A different setting algorithm is used for setting parameters according to the number.

  In this way, the setting of the parameter value related to the transmission power according to the number of the first reception confirmation responses subjected to the logical operation and the transmission power according to the number of the generated second reception confirmation responses are set. By using a different setting algorithm for setting related parameter values, the step size (α) with respect to the number of first reception confirmation responses for which a logical operation has been performed and the generated second reception confirmation response A step size independent of the step size for the number (β) can be used, the transmission power control suitable for the effect on the compression of the first acknowledgment, and the actual acknowledgment Transmission power control suitable for the required quality of information can be performed.

  (5) Moreover, in the mobile station apparatus of the present invention, the parameter setting unit uses a setting algorithm in which parameter values are set linearly, and depends on the number of the first reception confirmation responses that have undergone a logical operation. In this case, linear processing using different step sizes is performed according to the parameter setting and the parameter setting according to the number of the second reception confirmation responses.

  As described above, the step size (α) with respect to the number of first reception confirmation responses subjected to logical operation and the step size (β) with respect to the number of second reception confirmation responses generated are different values for each step size. To achieve transmission power control suitable for the effect on the compression of the first reception confirmation response and transmission power control suitable for the required quality of the information of the reception confirmation response actually transmitted And efficient transmission power control can be performed.

  (6) The communication system of the present invention is a communication system including a plurality of mobile station apparatuses and a base station apparatus that communicates with the plurality of mobile station apparatuses, and the base station apparatus includes the mobile station A mobile station apparatus configured to receive a first reception confirmation response to downlink data received from the base station apparatus in a plurality of frequency domains and a plurality of time domains. A first reception confirmation response generation unit to generate and a second operation to perform logical operation on at least two or more first reception confirmation responses and generate at least one second reception confirmation response A reception confirmation response generation unit, a parameter setting unit that sets a parameter value according to the number of the first reception confirmation responses that have undergone a logical operation, and transmission of a signal that indicates the contents of the second reception confirmation response Controlled using the parameters of the set value a force by the parameter setting unit, and having a transmitter which transmits a signal indicating the second contents of the received acknowledgment.

  In this way, a parameter value related to transmission power is set according to the number of first reception confirmation responses for which a logical operation is performed, and a plurality of second reception confirmation responses are set using the set parameter values. An efficient communication system can be realized by transmitting the second PUCCH by controlling the transmission power of the second PUCCH used for transmitting the signal generated from the information. The parameter value based on the PUCCH signal configuration is set according to the rate at which the first acknowledgment response information is compressed by the logical operation, and the parameter value related to transmission power is increased as the rate of compression increases. Effect when the base station apparatus 3 cannot appropriately acquire the information of the second reception confirmation response by setting the transmission power of the signal of the second PUCCH to a large value by setting a larger value Can be made relatively constant, and an efficient communication system can be realized. Specifically, as the rate at which the first reception confirmation response is compressed increases, the transmission power of the second PUCCH signal is set to a larger value, and the second reception confirmation response information can be appropriately acquired. The probability that the first acknowledgment is not compressed can be reduced as compared with the case where the rate at which the first acknowledgment is compressed is small, so that the unnecessary retransmission on the PDSCH occurs and the influence on the downlink system throughput is made relatively uniform. can do.

  (7) Moreover, the communication method of this invention is a communication method used for the mobile station apparatus which transmits a signal to a base station apparatus, The downlink received from the said base station apparatus in several frequency domain and several time domain Generating a first acknowledgment for data, and performing a logical operation on at least two of the first acknowledgments to generate at least one second acknowledgment And setting a parameter value according to the number of the first reception confirmation responses for which a logical operation has been performed; and transmitting power of a signal indicating the content of the second reception confirmation response in the parameter setting unit And at least a step of transmitting a signal indicating the content of the second reception confirmation response, which is controlled using a parameter having a set value.

  In this way, a parameter value related to transmission power is set according to the number of first reception confirmation responses for which a logical operation is performed, and a plurality of second reception confirmation responses are set using the set parameter values. An efficient communication system can be realized by transmitting the second PUCCH by controlling the transmission power of the second PUCCH used for transmitting the signal generated from the information. The parameter value based on the PUCCH signal configuration is set according to the rate at which the first acknowledgment response information is compressed by the logical operation, and the parameter value related to transmission power is increased as the rate of compression increases. Effect when the base station apparatus 3 cannot appropriately acquire the information of the second reception confirmation response by setting the transmission power of the signal of the second PUCCH to a large value by setting a larger value Can be made relatively constant, and an efficient communication system can be realized. Specifically, as the rate at which the first reception confirmation response is compressed increases, the transmission power of the second PUCCH signal is set to a larger value, and the second reception confirmation response information can be appropriately acquired. The probability that the first acknowledgment is not compressed can be reduced as compared with the case where the rate at which the first acknowledgment is compressed is small, so that the unnecessary retransmission on the PDSCH occurs and the influence on the downlink system throughput is made relatively uniform. can do.

  (8) Moreover, the integrated circuit of the present invention is an integrated circuit that causes the mobile station apparatus to perform a plurality of functions by being mounted on the mobile station apparatus, and the integrated circuit in the plurality of frequency domains and the plurality of time domains. A function of generating a first reception confirmation response for downlink data received from the base station apparatus, and performing a logical operation on at least two or more first reception confirmation responses, and at least one or more first reception confirmation responses A function for generating a second reception confirmation response, a function for setting a parameter value according to the number of the first reception confirmation responses for which a logical operation has been performed, and a signal indicating the content of the second reception confirmation response The mobile station apparatus has a series of functions including a function of transmitting a signal indicating the content of the second reception confirmation response by controlling the transmission power of the mobile station apparatus using a parameter having a value set by the parameter setting unit. In Characterized in that to volatilization.

  In this way, a parameter value related to transmission power is set according to the number of first reception confirmation responses for which a logical operation is performed, and a plurality of second reception confirmation responses are set using the set parameter values. An efficient communication system can be realized by transmitting the second PUCCH by controlling the transmission power of the second PUCCH used for transmitting the signal generated from the information. The parameter value based on the PUCCH signal configuration is set according to the rate at which the first acknowledgment response information is compressed by the logical operation, and the parameter value related to transmission power is increased as the rate of compression increases. Effect when the base station apparatus 3 cannot appropriately acquire the information of the second reception confirmation response by setting the transmission power of the signal of the second PUCCH to a large value by setting a larger value Can be made relatively constant, and an efficient communication system can be realized. Specifically, as the rate at which the first reception confirmation response is compressed increases, the transmission power of the second PUCCH signal is set to a larger value, and the second reception confirmation response information can be appropriately acquired. The probability that the first acknowledgment is not compressed can be reduced as compared with the case where the rate at which the first acknowledgment is compressed is small, so that the unnecessary retransmission on the PDSCH occurs and the influence on the downlink system throughput is made relatively uniform. can do.

  According to the present invention, the base station apparatus can appropriately acquire information from the uplink signal transmitted from the mobile station apparatus, and can realize a more efficient communication system.

It is a schematic block diagram which shows the structure of the base station apparatus 3 which concerns on embodiment of this invention. It is a schematic block diagram which shows the structure of the transmission process part 107 of the base station apparatus 3 which concerns on embodiment of this invention. It is a schematic block diagram which shows the structure of the reception process part 101 of the base station apparatus 3 which concerns on embodiment of this invention. It is a schematic block diagram which shows the structure of the mobile station apparatus 5 which concerns on embodiment of this invention. It is a schematic block diagram which shows the structure of the reception process part 401 of the mobile station apparatus 5 which concerns on embodiment of this invention. It is a schematic block diagram which shows the structure of the transmission process part 407 of the mobile station apparatus 5 which concerns on embodiment of this invention. It is a figure explaining the correspondence of the value of the parameter regarding the number of the 1st reception confirmation responses with which the logical operation was performed, and transmission power used with the mobile station apparatus 5 which concerns on embodiment of this invention. It is a figure explaining the correspondence of the value of the parameter regarding the number of the produced | generated 2nd reception confirmation response used by the mobile station apparatus 5 which concerns on embodiment of this invention, and transmission power. It is a flowchart which shows an example of the process regarding the setting of the value of the parameter relevant to the transmission power of the mobile station apparatus 5 which concerns on embodiment of this invention. In the mobile station apparatus 5 according to the embodiment of the present invention, with respect to ACK / NACK transmitted on a single second PUCCH, an example of a corresponding downlink radio frame configuration, cell aggregation configuration, and spatial binding setting FIG. In the mobile station apparatus 5 according to the embodiment of the present invention, with respect to ACK / NACK transmitted on a single second PUCCH, an example of a corresponding downlink radio frame configuration, cell aggregation configuration, and spatial binding setting FIG. In the mobile station apparatus 5 according to the embodiment of the present invention, with respect to ACK / NACK transmitted on a single second PUCCH, an example of a corresponding downlink radio frame configuration, cell aggregation configuration, and spatial binding setting FIG. It is a figure explaining the outline about the whole picture of the communications system concerning the embodiment of the present invention. It is a figure which shows schematic structure of the time frame of the downlink from the base station apparatus 3 which concerns on embodiment of this invention to the mobile station apparatus 5. FIG. It is a figure which shows schematic structure of the time frame of the uplink from the mobile station apparatus 5 which concerns on embodiment of this invention to the base station apparatus 3. FIG. It is a figure which shows an example of a structure of the radio | wireless frame in the communication system which concerns on embodiment of this invention. It is a figure which shows the structure and number of the resource of the 1st PUCCH for ACK / NACK of the communication system which concerns on embodiment of this invention. It is a figure which shows the structure and number of the resource of the 2nd PUCCH for ACK / NACK of the communication system which concerns on embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. First, an overview of the communication system according to the present embodiment, a configuration of a radio frame, and the like will be described with reference to FIGS. Next, the configuration of the communication system according to the present embodiment will be described with reference to FIGS. Next, operation processing of the communication system according to the present embodiment will be described with reference to FIGS.

<Overview of communication system>
FIG. 13 is a diagram illustrating an outline of the overall image of the communication system according to the embodiment of the present invention. In the communication system 1 shown in this figure, a base station apparatus (also referred to as eNodeB and NodeB) 3 and a plurality of mobile station apparatuses (also referred to as UE: User Equipment) 5A, 5B, and 5C communicate. Further, in this figure, the downlink (also referred to as DL: Downlink) which is the communication direction from the base station apparatus 3 to the mobile station apparatuses 5A, 5B, and 5C is a downlink pilot channel, a physical downlink control channel (PDCCH). : Also referred to as Physical Downlink Control CHannel), and physical downlink shared channel (PDSCH: also referred to as Physical Downlink Shared CHannel). In this figure, the uplink (also referred to as UL: Uplink), which is the communication direction from the mobile station devices 5A, 5B, 5C to the base station device 3, is also referred to as a physical uplink shared channel (PUSCH: PhysicalUplink Shared CHannel). ), An uplink pilot channel, and a physical uplink control channel (PUCCH: also called Physical Uplink Control CHannel). A channel means a medium used for signal transmission. A channel used in the physical layer is called a physical channel, and a channel used in the media access (Media Access Control: MAC) layer is called a logical channel.

  The PDSCH is a physical channel used for transmission / reception of downlink data and control information. The PDCCH is a physical channel used for transmission / reception of downlink control information. PUSCH is a physical channel used for transmission / reception of uplink data and control information. The PUCCH is a physical channel used for transmission / reception of uplink control information (uplink control information: UCI). As the type of UCI, whether to request an acknowledgment (ACK / NACK) indicating an acknowledgment (Acknowledgement: ACK) or a negative acknowledgment (NACK) for PDSCH downlink data, and resource allocation A scheduling request (SR) or the like indicating that is used. Other physical channel types include synchronization channel (Synchronization CHannel: SCH) used to establish downlink synchronization and physical random access channel (Physical Random Access CHannel: PRACH) used to establish uplink synchronization. A physical broadcast channel (PBCH) used for transmission of downlink system information is used. The PDSCH is also used for transmission of downlink system information.

  The mobile station devices 5A, 5B, 5C, or the base station device 3 arranges and transmits signals generated from control information, data, and the like on each physical channel. Data transmitted on the physical downlink shared channel or the physical uplink shared channel is referred to as a transport block. Moreover, the area which the base station apparatus 3 has jurisdiction over is called a cell. Hereinafter, in the present embodiment, the mobile station devices 5A, 5B, and 5C are referred to as the mobile station device 5 and will be described.

<Carrier aggregation / Cell aggregation>
In the communication system according to the embodiment of the present invention, communication is performed using a plurality of frequency bands having a predetermined frequency bandwidth (also referred to as frequency band aggregation; spectrum aggregation; carrier aggregation; carrier aggregation, frequency aggregation, etc.). . Here, one frequency band is called a component carrier (Component Carrier: CC). Specifically, in communication using carrier aggregation, a downlink physical channel is transmitted and received for each downlink CC (downlink component carrier; referred to as DL CC), and an uplink CC (uplink component) is transmitted. Carrier; referred to as UL CC.) An uplink physical channel is transmitted and received every time. That is, in the communication system according to the embodiment of the present invention using carrier aggregation, in the uplink and the downlink, the base station device 3 and the plurality of mobile station devices 5 transmit signals on a plurality of physical channels using a plurality of CCs. Send and receive at the same time.

  The base station apparatus communicates using one arbitrary frequency band in one cell. Carrier aggregation is communication by a plurality of cells using a plurality of frequency bands, and is also referred to as cell aggregation. In cell aggregation, one cell is defined as a primary cell (Primary Cell, Pcell), and the remaining cells are defined as secondary cells (Secondary Cell, Scell). Setting of the primary cell and the secondary cell is performed independently for each mobile station apparatus. A primary cell is always composed of a set of one downlink component carrier and one uplink component carrier. The secondary cell is configured from at least one downlink component carrier, and an uplink component carrier may or may not be configured. For the sake of simplification of description, the present embodiment will be described assuming that one secondary cell is composed of a set of one downlink component carrier and one uplink component carrier. A component carrier used in the primary cell is referred to as a primary component carrier (Primary CC, PCC). A component carrier used in the secondary cell is referred to as a secondary component carrier (Secondary CC, SCC). In the primary cell and the secondary cell, data communication using PDSCH and PUSCH is performed in common, but other various processes are performed differently. Briefly, a plurality of processes are performed only in the primary cell and not performed in the secondary cell. For example, in the primary cell, acquisition of system information (also referred to as SIB: System Information Block) in the downlink, determination of lack of radio quality (RLF: Radio Link Failure), and the like are performed, and randomization using PRACH in the uplink. An access procedure is executed, and UCI transmission / reception using PUCCH is performed.

  The base station device 3 sets a transmission mode for each cell configured in the mobile station device 5. The transmission mode is a setting that means whether single data transmission is performed in each cell or two data transmissions are basically performed. In other words, the transmission mode means the maximum number of data that can be transmitted in a certain downlink subframe. Even when a transmission mode in which two data transmissions are basically performed is set, single data is transmitted for each downlink subframe, or two data are transmitted. When a transmission mode in which single data transmission is performed is set, only single data is transmitted in any downlink subframe, and two data are not transmitted. Here, with single data transmission, spatial multiplexing of a plurality of data by MIMO (Multi-Input Multi-Output) using a plurality of antenna ports is not used for PDSCH transmission, and a single data signal is transmitted. Means to be sent. A single data signal can be transmitted using a single antenna port, or can be diversity-transmitted, weighted-transmitted, not spatially multiplexed, using a plurality of antenna ports. Here, the antenna port means a logical antenna used in signal processing, and one antenna port may be composed of a plurality of physical antennas. With respect to the transmission antenna, a plurality of physical antennas constituting the same antenna port transmit the same signal. Although delay diversity or CDD (Cyclic Delay Diversity) can be applied using a plurality of physical antennas in the same antenna port, other signal processing cannot be used. Here, two data transmissions mean that spatial multiplexing by MIMO is used for PDSCH transmission, and signals of two data sequences (transport blocks) are simultaneously transmitted through a plurality of antenna ports.

<Configuration of downlink time frame>
FIG. 14 is a diagram showing a schematic configuration of a downlink time frame from the base station apparatus 3 to the mobile station apparatus 5 according to the embodiment of the present invention. In this figure, the horizontal axis represents the time domain, and the vertical axis represents the frequency domain. The downlink time frame is a unit for resource allocation and the like, and is a resource block (RB) (physical resource block; also referred to as a PRB: Physical Resource Block) composed of a frequency band and a time slot having a predetermined downlink width. .)) (Physical resource block pair; referred to as PRB pair). One downlink physical resource block pair (referred to as downlink physical resource block pair) is composed of two physical resource blocks (referred to as downlink physical resource blocks) that are continuous in the downlink time domain. Is done.

  Also, in this figure, one downlink physical resource block is composed of 12 subcarriers (referred to as downlink subcarriers) in the downlink frequency domain, and 7 OFDM (orthogonal) in the time domain. It consists of Orthogonal Frequency Division Multiplexing symbols. A downlink system band (referred to as a downlink system band) is a downlink communication band of the base station apparatus 3. The downlink system bandwidth (referred to as downlink system bandwidth) is composed of the bandwidths of a plurality of downlink component carriers (referred to as downlink component carrier bandwidths). In the communication system 1, a downlink component carrier (referred to as a downlink component carrier) (DL CC) is a band of a predetermined frequency bandwidth, and the downlink component carrier bandwidth is a frequency of the downlink component carrier. Bandwidth. For example, a downlink system band having a frequency bandwidth of 40 MHz is composed of two downlink component carriers having a frequency bandwidth of 20 MHz.

  In the downlink component carrier, a plurality of downlink physical resource blocks are arranged according to the downlink component carrier bandwidth. For example, a downlink component carrier having a frequency bandwidth of 20 MHz is composed of 100 downlink physical resource blocks. Further, for example, the downlink component carrier bandwidth is a frequency bandwidth that can be used for communication by the mobile station device 5 corresponding to LTE, and the downlink system bandwidth is determined by the mobile station device 5 corresponding to LTE-A. It is a frequency bandwidth that can be used for communication. The mobile station apparatus 5 compatible with LTE can communicate with only one cell at a time, and the mobile station apparatus 5 compatible with LTE-A can communicate with a plurality of cells simultaneously. The downlink component carrier bandwidth is a downlink frequency bandwidth of one cell, and the downlink system bandwidth is a collection of downlink frequency bandwidths of a plurality of cells.

  In the time domain shown in this figure, a slot composed of seven OFDM symbols (referred to as a downlink slot) and a subframe composed of two downlink slots (referred to as a downlink subframe). There is.) A unit composed of one downlink subcarrier and one OFDM symbol is called a resource element (RE) (downlink resource element). In each downlink subframe, at least a PDSCH used for transmitting information data (also referred to as a transport block) and a PDCCH used for transmitting control information are arranged. In this figure, the PDCCH is composed of the first to third OFDM symbols in the downlink subframe, and the PDSCH is composed of the fourth to fourteenth OFDM symbols in the downlink subframe. Note that the number of OFDM symbols constituting the PDCCH and the number of OFDM symbols constituting the PDSCH may be changed for each downlink subframe.

  Although not shown in this figure, a downlink pilot channel used for transmission of a downlink reference signal (Reference signal: RS) (referred to as downlink reference signal, also referred to as Cell specific RS, DL RS) is provided. Distributed to a plurality of downlink resource elements. Here, the downlink reference signal is a signal known in the communication system 1 that is used for estimating propagation path fluctuations of the PDSCH and PDCCH. Note that the number of downlink resource elements constituting the downlink reference signal depends on the number of transmission antennas used for communication to the mobile station apparatus 5 in the base station apparatus 3.

  One PDSCH is composed of one or more downlink physical resource blocks in the same downlink component carrier, and one PDCCH is composed of a plurality of downlink resource elements in the same downlink component carrier. The A plurality of PDSCHs and a plurality of PDCCHs are arranged in the downlink system band. The base station apparatus 3 has one PDCCH and one PDCCH including control information related to the allocation of PDSCH resources in the same downlink component carrier in the same downlink subframe with respect to one mobile station apparatus 5 corresponding to LTE. A plurality of PDCCHs and a plurality of PDSCHs including control information related to allocation of PDSCH resources in the same downlink subframe can be allocated to one mobile station apparatus 5 corresponding to LTE-A. Can be arranged. Note that the base station apparatus 3 transmits control information related to allocation of resources of a plurality of PDSCHs in the same downlink component carrier in the same downlink subframe to one mobile station apparatus 5 corresponding to LTE-A. A plurality of PDCCHs can be arranged, but a plurality of PDSCHs cannot be arranged in the same downlink component carrier, and each PDSCH can be arranged in a different downlink component carrier.

  PDCCH is information indicating allocation of downlink physical resource blocks to PDSCH, information indicating allocation of uplink physical resource blocks to PUSCH, a mobile station identifier (referred to as Radio Network Temporary Identifier: RNTI), modulation scheme, and encoding. A signal generated from control information such as a rate, a retransmission parameter, multi-antenna related information, a transmission power control command (TPC command), and information indicating a PUCCH resource is arranged. Control information included in the PDCCH is referred to as downlink control information (Downlink Control Information: DCI). DCI including information indicating assignment of the downlink physical resource block to the PDSCH is referred to as downlink assignment (also referred to as DL assignment, also referred to as Downlink grant), and indicates the assignment of the uplink physical resource block to the PUSCH. The DCI including information is called an uplink grant (uplink grant: UL grant). Note that the downlink assignment includes a transmission power control command for PUCCH. The uplink assignment includes a transmission power control command for PUSCH. One PDCCH is information indicating the allocation of one PDSCH resource in one downlink component carrier, or the information indicating the allocation of one PUSCH resource in one uplink component carrier. However, it does not include information indicating resource allocation of a plurality of PDSCHs or information indicating resource allocation of a plurality of PUSCHs.

<Configuration of uplink time frame>
FIG. 15 is a diagram illustrating a schematic configuration of an uplink time frame from the mobile station apparatus 5 to the base station apparatus 3 according to the embodiment of the present invention. In this figure, the horizontal axis represents the time domain, and the vertical axis represents the frequency domain. An uplink time frame is a unit for resource allocation or the like, and is from a physical resource block pair (referred to as an uplink physical resource block pair) composed of a frequency band and a time band having a predetermined width in the uplink. Composed. One uplink physical resource block pair is composed of two uplink physical resource blocks (referred to as uplink physical resource blocks) that are continuous in the uplink time domain.

  Also, in this figure, one uplink physical resource block is composed of 12 subcarriers (referred to as uplink subcarriers) in the uplink frequency domain, and 7 SC-FDMAs in the time domain. (Single-Carrier Frequency Division Multiple Access) symbols. An uplink system band (referred to as an uplink system band) is an uplink communication band of the base station apparatus 3. The uplink system bandwidth (referred to as uplink system bandwidth) is composed of a frequency bandwidth (referred to as uplink component carrier bandwidth) of a plurality of uplink component carriers in the uplink. In the communication system 1, an uplink component carrier (referred to as an uplink component carrier) (UL CC) is a band of a predetermined frequency bandwidth, and the uplink component carrier bandwidth is the frequency of the uplink component carrier. Bandwidth. For example, an uplink system band having a frequency bandwidth of 40 MHz (referred to as an uplink system band) is composed of two uplink component carriers having a frequency bandwidth of 20 MHz.

  In the uplink component carrier, a plurality of uplink physical resource blocks are arranged according to the uplink component carrier bandwidth. For example, an uplink component carrier having a frequency bandwidth of 20 MHz is composed of 100 uplink physical resource blocks. Also, for example, the uplink component carrier bandwidth is a frequency bandwidth that can be used for communication by the mobile station device 5 that supports LTE, and the uplink system bandwidth is the mobile station device 5 that supports LTE-A. It is a frequency bandwidth that can be used for communication. The mobile station apparatus 5 compatible with LTE can communicate with only one cell at a time, and the mobile station apparatus 5 compatible with LTE-A can communicate with a plurality of cells simultaneously. The uplink component carrier bandwidth is the uplink frequency bandwidth of one cell, and the uplink system bandwidth is the sum of the uplink frequency bandwidths of a plurality of cells.

  In the time domain shown in this figure, a slot composed of seven SC-FDMA symbols (referred to as an uplink slot) and a subframe composed of two uplink slots (uplink subframe). Called). A unit composed of one uplink subcarrier and one SC-FDMA symbol is called a resource element (referred to as an uplink resource element).

  In each uplink subframe, at least a PUSCH used for transmission of information data and a PUCCH used for transmission of uplink control information (UCI) are arranged. PUCCH is comprised from two types, 1st PUCCH and 2nd PUCCH. The first PUCCH is a UCI (ACK / NACK) indicating an acknowledgment (ACK: Acknowledgment) or a negative acknowledgment (NACK: Negative Acknowledgement) for data received using the PDSCH when cell aggregation is not used. UCI (SR: Scheduling Request) indicating at least whether resource allocation is requested or UCI (CQI: Channel Quality Indicator) indicating downlink reception quality (also referred to as channel quality) Used to send The second PUCCH is used to transmit ACK / NACK when cell aggregation is used. Also, Spatial bundlel is used for ACK / NACK when cell aggregation is used.

  In addition, when the mobile station apparatus 5 indicates to the base station apparatus 3 that the allocation of uplink resources is requested, the mobile station apparatus 5 transmits a signal using the first PUCCH for SR transmission. The base station apparatus 3 recognizes that the mobile station apparatus 5 requests uplink resource allocation from the result of detecting a signal using the first PUCCH resource for SR transmission. When the mobile station apparatus 5 indicates to the base station apparatus 3 that it does not request allocation of uplink resources, the mobile station apparatus 5 does not send any signal with the first PUCCH resource for transmission of the SR allocated in advance. Do not send. The base station apparatus 3 recognizes that the mobile station apparatus 5 does not request uplink resource allocation from the result that the signal is not detected in the first PUCCH resource for SR transmission. Note that the second PUCCH may be used to transmit the SR. Note that the second PUCCH may be used to transmit CQI.

  Also, the first PUCCH uses different types of signal configurations when a UCI composed of ACK / NACK is transmitted, a UCI composed of SR is transmitted, and a UCI composed of CQI is transmitted. It is done. The first PUCCH used for transmission of ACK / NACK is referred to as PUCCH format 1a or PUCCH format 1b. In PUCCH format 1a, BPSK (Binary Phase Shift Keying) is used as a modulation method for modulating information about ACK / NACK. In PUCCH format 1a, 1-bit information is indicated from the modulated signal. In PUCCH format 1b, QPSK (Quadrature Phase Shift Keying) is used as a modulation method for modulating information about ACK / NACK. In PUCCH format 1b, 2-bit information is indicated from the modulated signal. The first PUCCH used for SR transmission is referred to as PUCCH format 1. The first PUCCH used for CQI transmission is referred to as PUCCH format 2. The first PUCCH used for simultaneous transmission of CQI and ACK / NACK is referred to as PUCCH format 2a or PUCCH format 2b. In PUCCH format 2b, the reference signal of the uplink pilot channel is multiplied by a modulation signal generated from ACK / NACK information. In PUCCH format 2a, 1-bit information about ACK / NACK and CQI information are transmitted. In PUCCH format 2b, 2-bit information related to ACK / NACK and CQI information are transmitted. The second PUCCH has a signal configuration using the DFT-S-OFDM scheme. The second PUCCH used for ACK / NACK transmission when cell aggregation is used is referred to as PUCCH format 3.

  One PUSCH is composed of one or more uplink physical resource blocks in the same uplink component carrier, and one first PUCCH is symmetrical in the frequency domain within the same uplink component carrier. Yes, it is composed of two uplink physical resource blocks located in different uplink slots, and one second PUCCH is composed of two uplink physical resource blocks in the same uplink component carrier. For example, in FIG. 15, in the uplink subframe in the uplink component carrier having the lowest frequency, the uplink physical resource block having the lowest frequency in the first uplink slot and the highest frequency in the second uplink slot. One uplink physical resource block pair used for the first PUCCH is configured by an uplink physical resource block having a high. For example, in FIG. 15, in the uplink subframe in the uplink component carrier having the lowest frequency, the uplink physical resource block having the second lowest frequency in the first uplink slot and the second uplink slot. The uplink physical resource block having the second lowest frequency constitutes one uplink physical resource block pair used for the second PUCCH. Note that the second PUCCH may be configured from two uplink physical resource blocks that are in the frequency domain within the same uplink component carrier and are located in different uplink slots.

  One or more PUSCHs and one or more first PUCCHs are arranged in the uplink system band. Further, when communication using cell aggregation is performed between the base station apparatus 3 and the mobile station apparatus 5, one or more second PUCCHs are arranged in the uplink system band. The mobile station apparatus 5 corresponding to LTE can arrange and transmit the first PUCCH resource and the PUSCH resource in the same uplink component carrier. Note that the base station apparatus 3 may allocate different first PUCCH resources for each ACK / NACK, SR, or CQI when cell aggregation is not used for the mobile station apparatus 5 that supports LTE. However, the mobile station apparatus 5 corresponding to LTE uses only one first PUCCH resource in the same uplink subframe. In addition, when the first PUCCH resource and the PUSCH resource are allocated in the same uplink subframe, the mobile station apparatus 5 corresponding to LTE transmits a signal using only the PUSCH resource.

  Moreover, the base station apparatus 3 can allocate one PUSCH resource for every uplink component carrier with respect to the one mobile station apparatus 5 corresponding to LTE-A. The mobile station apparatus 5 corresponding to LTE-A can transmit signals using a plurality of PUSCH resources when PUSCH resources are allocated by a plurality of uplink component carriers in the same uplink subframe. . Note that the base station apparatus 3 cannot allocate a plurality of PUSCH resources in the same uplink component carrier in the same uplink subframe to one mobile station apparatus 5 corresponding to LTE-A. The resources of each PUSCH can be allocated to different uplink component carriers. Moreover, the base station apparatus 3 can allocate one or more first PUCCH resources to one uplink component carrier with respect to one mobile station apparatus 5 corresponding to LTE-A. When a plurality of first PUCCH resources are allocated in the same uplink subframe, the mobile station apparatus 5 corresponding to LTE-A uses any one PUCCH resource. In such a case, which first PUCCH resource the mobile station apparatus 5 selects is performed according to a determined rule. Moreover, the base station apparatus 3 can allocate one second PUCCH resource to one uplink component carrier with respect to one mobile station apparatus 5 corresponding to LTE-A. Note that the first PUCCH resource and the second PUCCH resource allocated to the mobile station apparatus 5 are configured by resources in the same uplink component carrier.

  The uplink component carrier to which the first PUCCH resource and the second PUCCH resource are allocated is an uplink primary component carrier and is a primary cell. In addition, the mobile station apparatus 5 corresponding to LTE-A has PUSCH and PUCCH (first PUCCH, second PUCCH. For the sake of simplification of description, PUCCH will be referred to as both first PUCCH and second PUCCH hereinafter. If the PUCCH resource and the PUSCH resource are allocated in the same uplink subframe, the signal is transmitted using only the PUSCH resource. . Moreover, when the mobile station apparatus 5 corresponding to LTE-A is set to perform simultaneous transmission of PUSCH and PUCCH, when PUCCH resources and PUSCH resources are allocated in the same uplink subframe, Basically, signals can be transmitted using both PUCCH resources and PUSCH resources.

  The uplink pilot channel is arranged in the same uplink physical resource block as the PUSCH, the uplink pilot channel is arranged in the same uplink physical resource block as the first PUCCH, and the same uplink physical as the second PUCCH. It is arranged in a different SC-FDMA symbol or in the same SC-FDMA symbol depending on whether it is arranged in a resource block. The uplink pilot channel is used to transmit an uplink reference signal (UL RS). Here, the uplink reference signal is a signal known in the communication system 1 that is used for estimation of propagation path fluctuations of PUSCH and PUCCH.

  When the uplink pilot channel is arranged in the same uplink physical resource block as PUSCH, it is arranged in the fourth SC-FDMA symbol in the uplink slot. When the uplink pilot channel is arranged in the same uplink physical resource block as the first PUCCH including ACK / NACK when cell aggregation is not used, the 3rd, 4th and 5th in the uplink slot Arranged in the SC-FDMA symbol. When the uplink pilot channel is arranged in the same uplink physical resource block as the first PUCCH including SR, the uplink pilot channel is arranged in the third, fourth, and fifth SC-FDMA symbols in the uplink slot. When the uplink pilot channel is arranged in the same uplink physical resource block as the first PUCCH including CQI, the uplink pilot channel is arranged in the second and sixth SC-FDMA symbols in the uplink slot. When the uplink pilot channel is arranged in the same uplink physical resource block as the second PUCCH, the uplink pilot channel is arranged in the second and sixth SC-FDMA symbols in the uplink slot.

  FIG. 15 shows the case where the first PUCCH is arranged in the uplink physical resource block at the end of each uplink component carrier, but the second, third, etc. uplink from the end of the uplink component carrier. A physical resource block may be used for the first PUCCH. FIG. 15 shows a case where the second PUCCH is arranged in the uplink physical resource block of the uplink component carrier having the lowest frequency, but the second, third, etc. from the end of the uplink system band The uplink physical resource block of the uplink component carrier may be used for the second PUCCH. FIG. 15 shows the case where the second PUCCH is arranged in the second uplink physical resource block from the end of the uplink component carrier, but the third, fourth, etc. from the end of the uplink component carrier. Uplink physical resource blocks may be used for the second PUCCH.

  In the first PUCCH, code multiplexing in the frequency domain and code multiplexing in the time domain are used. Code multiplexing in the frequency domain is processed by multiplying each code of the code sequence by a modulated signal modulated from uplink control information in subcarrier units. Code multiplexing in the time domain is processed by multiplying each code of the code sequence by a modulated signal modulated from uplink control information in units of SC-FDMA symbols. A plurality of first PUCCHs are arranged in the same uplink physical resource block, and each first PUCCH is assigned a different code sequence, and code multiplexing is realized in the frequency domain or time domain by the assigned code sequence. . In the first PUCCH (PUCCH format 1a, PUCCH format 1b) used for transmitting ACK / NACK, code multiplexing in the frequency domain and the time domain is used. In the first PUCCH (PUCCH format 1) used for transmitting the SR, code multiplexing in the frequency domain and the time domain is used. In the first PUCCH (PUCCH format 2) used for transmitting CQI, code multiplexing in the frequency domain is used. Also, code multiplexing in the time domain is used in the second PUCCH. A plurality of second PUCCHs are arranged in the same uplink physical resource block, and each second PUCCH is assigned a different code sequence, and code multiplexing is realized in the time domain by the assigned code sequence. Code multiplexing in the time domain is used in the second PUCCH (PUCCH format 3) used for transmitting ACK / NACK in the case of using cell aggregation. For simplification of description, description of the contents related to PUCCH code multiplexing is omitted as appropriate.

  In the communication system 1 according to the embodiment of the present invention, the OFDM scheme is applied in the downlink, and the NxDFT-Spread OFDM scheme is applied in the uplink. Here, the NxDFT-Spread OFDM scheme is a scheme for transmitting and receiving signals using the DFT-Spread OFDM scheme in units of uplink component carriers, and the uplink subframe of the communication system 1 using a plurality of uplink component carriers. Is a method of performing communication using a plurality of processing units related to DFT-Spread OFDM transmission / reception.

  In the time domain, the PDSCH resource is arranged in the same downlink subframe as the downlink subframe in which the PDCCH resource including the downlink assignment used for the allocation of the PDSCH resource is arranged, and in the frequency domain. , It is arranged on the same downlink component carrier as that of the PDCCH including the downlink assignment used for allocation of the resource of the PDSCH, or on a different downlink component carrier.

  In DCI, information indicating which downlink component carrier corresponds to the PDSCH transmitted by the downlink assignment or which uplink component carrier corresponds to the PUSCH transmitted by the uplink grant (hereinafter referred to as DCSCH). , Referred to as “carrier indicator”). When the carrier assignment is not included in the downlink assignment, the downlink assignment corresponds to the PDSCH of the same downlink component carrier as the downlink component carrier to which the downlink assignment is transmitted. When the carrier grant is not included in the uplink grant, the uplink grant corresponds to the PUSCH of the uplink component carrier associated in advance with the downlink component carrier to which the uplink grant is transmitted. In addition, when the carrier indicator is not included in the DCI, the information indicating the correspondence between the downlink component carrier and the uplink component carrier used for the interpretation of the uplink grant resource allocation is the information before communication of information data is performed. Then, the base station apparatus 3 notifies the mobile station apparatus 5 using system information.

<Configuration of radio frame>
In the embodiment of the present invention, one radio frame is composed of 10 subframes including one or more downlink subframes, one or more uplink subframes, and one or more special subframes. The The special subframe is composed of three areas: DwPTS (Downlink Pilot Time Slot), GP (Guard Period), and UpPTS (Uplink Pilot Time Slot). DwPTS, GP, and UpPTS are time multiplexed. DwPTS is an area in which downlink physical channels and signals such as PDCCH and PDSCH are transmitted. UpPTS is a region in which a sounding reference signal (SRS) and / or PRACH is transmitted, and PUCCH and PUSCH are not transmitted in UpPTS. The SRS is an uplink reference signal used by the base station apparatus 3 to estimate the uplink channel quality of the mobile station apparatus 5, and is transmitted in the last SC-FDMA symbol of the uplink subframe or special subframe. The GP is a period for the mobile station apparatus 5 and the base station apparatus 3 to switch between uplink transmission / reception and downlink transmission / reception. The number of downlink subframes, uplink subframes and special subframes constituting one radio frame, and the arrangement in the radio frame are set by the base station apparatus 3, and information indicating the configuration of the set radio frame is moved. The station apparatus 5 is notified.

  FIG. 16 is a diagram illustrating an example of a configuration of a radio frame in the communication system according to the embodiment of the present invention. For simplification of description, the configuration of a radio frame in one cell will be described. However, when cell aggregation is performed, a plurality of cells used for cell aggregation use the same radio frame configuration. In FIG. 16, the horizontal axis represents the frequency domain, and the vertical axis represents the time domain. In FIG. 16, white squares indicate downlink subframes, squares hatched with diagonal lines indicate uplink subframes, and squares hatched with dots indicate special subframes. The number (#i) given to the subframe indicates the number of the subframe in the radio frame.

  In FIG. 16, the mobile station apparatus 5 uses the PDSCH of the downlink subframe # 8, the downlink subframe # 9, the downlink subframe # 0, and the special subframe # 1 (subframe surrounded by the thick dotted line in FIG. 16). Spatial bundling is performed on at least a part of a plurality of ACK / NACKs (first reception confirmation responses) for downlink data received in step 6, and at least six corresponding second reception confirmation responses are received from special subframe # 1. Is transmitted using the second PUCCH of uplink subframe # 7 after the second subframe. The first reception confirmation response and the second reception confirmation response will be described later. Also, the mobile station apparatus 5 receives a plurality of ACK / NACKs (first ACK / NACK) for downlink data received on the PDSCH from the downlink subframe # 3 to the special subframe # 6 (subframe surrounded by the thick solid line in FIG. 16). Spatial bundling is performed on at least a part of (acknowledgment reception response) of at least a second reception acknowledgment response corresponding to the second PUCCH of uplink subframe # 2 after six subframes from special subframe # 6. Send using. Note that the mobile station apparatus 5 that does not use Spatial bundling also has a plurality of downlink data received on the PDSCH of the downlink subframe # 8, the downlink subframe # 9, the downlink subframe # 0, and the special subframe # 1. ACK / NACK (first reception confirmation response) is transmitted using the second PUCCH of uplink subframe # 7 after six subframes from special subframe # 1, and from downlink subframe # 3. A plurality of ACKs / NACKs (first acknowledgments) for downlink data received on the PDSCH in special subframe # 6 are transmitted in the first subframe # 2 in uplink subframe # 2 after six subframes from special subframe # 6. Transmit using the second PUCCH. Note that the mobile station apparatus 5 that does not use cell aggregation also receives a plurality of ACK / NACKs for downlink data received on the PDSCH of a plurality of specific downlink subframes and special subframes, in the first uplink subframe. Transmit using one PUCCH. As described above, based on the configuration of the radio frame, the mobile station apparatus 5 sends an ACK / NACK (first reception confirmation response, second reception confirmation response) to any downlink subframe or special subframe data. Which uplink subframe PUCCH (first PUCCH, second PUCCH) is used for transmission is recognized.

<Cross-CC scheduling>
A PDCCH and a PDSCH including a downlink assignment corresponding to the PDCCH can be arranged in different downlink component carriers (referred to as Cross CC scheduling). A downlink component carrier in which PDSCH is arranged is referred to as a physical downlink shared channel component carrier (PDSCH CC). The downlink component carrier in which the PDCCH is arranged is referred to as a physical downlink control channel component carrier (PDCCH CC). In addition, when there is a possibility that PDSCH is arranged in all downlink component carriers used in cell aggregation, all downlink component carriers are PDSCH CCs.

  The downlink component carrier in which the PDCCH is arranged and the uplink component carrier in which the PUSCH including the uplink grant corresponding to the PDCCH is arranged are different from the downlink component carrier associated in the system information. be able to. The base station apparatus 3 notifies the mobile station apparatus 5 of system information for each downlink component carrier, and the system information includes information indicating an uplink component carrier associated with the downlink component carrier. System information including information indicating this association is referred to as SIB2 (System Information Block Type 2), and the association between the downlink component carrier and the uplink component carrier indicated by SIB2 is referred to as SIB2 linkage. The uplink component carrier in which the PUSCH is arranged is referred to as a physical uplink shared channel component carrier (PUSCH CC).

  The base station apparatus 3 determines to the mobile station apparatus 5 which downlink component carrier to use as the PDCCH CC among the plurality of downlink component carriers used for cell aggregation. Next, the base station apparatus 3 determines which PDSCH CC and which PUSCH CC each PDCCH CC is associated with. Here, the association between the PDCCH CC and the PDSCH CC means that a PDCCH including control information related to allocation of PDSCH resources arranged in the PDSCH CC is arranged in the PDCCH CC associated with the PDSCH CC. More specifically, the association between the PDCCH CC and the PDSCH CC is a downlink assignment corresponding to the PDSCH arranged in the PDSCH CC, and the PDCCH including the downlink assignment that also configures the carrier indicator is the PDSCH. It means that it is arranged on the PDCCH CC associated with the CC. Here, the association between the PDCCH CC and the PUSCH CC means that the PDCCH including control information related to the allocation of PUSCH resources arranged in the PUSCH CC is arranged in the PDCCH CC associated with the PUSCH CC. More specifically, the association between the PDCCH CC and the PUSCH CC is an uplink grant corresponding to the PUSCH arranged in the PUSCH CC, and the PDCCH including the uplink grant in which the carrier indicator is also configured is the PUSCH CC. This means that it is arranged in the associated PDCCH CC.

  As described above, the association described here is different from the association between the downlink component carrier and the uplink component carrier for the PDCCH that does not include the carrier indicator. Each of a plurality of PDSCH CCs used for cell aggregation may be associated with the same PDCCH CC, or each of a plurality of PDSCH CCs used for cell aggregation may be associated with a different PDCCH CC. For example, when a plurality of PDSCH CCs are associated with one PDCCH CC, the carrier indicator recognizes which PDSCH CC transmitted in the PDCCH CC indicates the PDSCH resource allocation.

  The base station apparatus 3 notifies the mobile station apparatus 5 of information indicating the downlink component carrier associated with each PDSCH CC as a PDCCH CC. This information is notified using radio link control (RRC) signaling. The mobile station apparatus 5 has a possibility that a PDCCH including a downlink assignment with a PDSCH carrier indicator of each PDSCH CC may be arranged based on information notified from the base station apparatus 3 using RRC signaling. Recognize component carriers. The PDCCH including the downlink assignment of PDSCH transmitted in the primary cell is transmitted only in the primary cell, and the PDCCH including the downlink assignment of PDSCH transmitted in the secondary cell is transmitted in the primary cell or the secondary cell. The In other words, the PDCCH CC and the PDSCH CC are always configured in the primary cell, and the PDCCH CC and the PDSCH CC configured in the primary cell are associated with each other. Further, the PUSCH CC of the primary cell is associated with the PDCCH CC of the primary cell. The PDSCH CC and PUSCH CC of the primary cell have SIB2 linkage. In the secondary cell, PDSCH CC is configured, but PDCCH CC may not be configured. PDCCH CC matched with PDSCH CC comprised by the secondary cell may be comprised by a primary cell, and may be comprised by another secondary cell. A PDSCH CC and a PUSCH CC are always configured in a cell in which a PDCCH CC is configured, and a PDCCH CC and a PDSCH CC, and a PDCCH CC and a PUSCH CC in the same cell are associated with each other. In addition, RRC signaling is notified by PDSCH. In addition, since PDSCH CC matched with PDSCH CC and PUSCH CC of a primary cell is necessarily comprised by the same primary cell, the information which shows those relationship is not notified with respect to the mobile station apparatus 5. FIG. Further, when Cross-CC scheduling is not applied, information indicating the association between the PDSCH CC and the PDCCH CC is not notified from the base station device 3 to the mobile station device 5. When Cross-CC scheduling is not applied, the carrier indicator is not included in the downlink assignment.

<Configuration of PUCCH resource for ACK / NACK>
FIG. 17 is a diagram illustrating the configuration and number of resources of the first ACK / NACK PUCCH (PUCCH format 1a, PUCCH format 1b) for the communication system according to the embodiment of the present invention. FIG. 17 shows a case where 24 first PUCCH resources for ACK / NACK are configured in each uplink subframe. Further, in FIG. 17, two uplink physical resource block pairs (PRB pair) (PRB pair 1, PRB pair 2) and four frequency domain code sequences (PRB pair 1) are included in the first PUCCH resource for ACK / NACK. Frequency domain code) (frequency domain code 1, frequency domain code 2, frequency domain code 3, frequency domain code 4), three time domain code sequences (time domain code) (time domain code) 1, time domain Code 2 and time domain Code 3) are used. Note that a different number of uplink physical resource block pairs, frequency domain code sequences, and time domain code sequences than the number shown in FIG. 17 may be used. A PUCCH resource may be configured in an uplink component carrier. The number of the uplink physical resource block pair shown here indicates the number of the uplink physical resource block pair used for the first PUCCH resource for ACK / NACK, for example, the highest frequency in the uplink system band. The number of the uplink physical resource block pair having a low value is not uniquely indicated. Each first PUCCH resource shown in FIG. 17 is composed of different combinations of an uplink physical resource block pair, a frequency domain code sequence, and a time domain code sequence, and a frequency domain, a code domain in the frequency domain, or They are orthogonal in the code domain in the time domain.

  FIG. 18 is a diagram showing a configuration and numbers of resources of a second PUCCH (PUCCH format 3) for ACK / NACK in the communication system according to the embodiment of the present invention. FIG. 18 shows a case where 10 ACK / NACK second PUCCH resources are configured in each uplink subframe. Further, in FIG. 18, two uplink physical resource block pairs (PRB pair) (PRB pair 1, PRB pair 2) and five time domain code sequences (PRB pair 2) are allocated to the second PUCCH resource for ACK / NACK. Time domain code) (time domain code 1, time domain code 2, time domain code 3) is used. Note that the number of uplink physical resource block pairs and time domain code sequences different from the number shown in FIG. 18 may be used, and the number of second PUCCH resources different from the number shown in FIG. You may comprise in a component carrier. The number of the uplink physical resource block pair shown here indicates the number of the uplink physical resource block pair used for the second PUCCH resource for ACK / NACK, for example, the highest frequency in the uplink system band. The number of the uplink physical resource block pair having a low value is not uniquely indicated. Each second PUCCH resource shown in FIG. 18 is composed of different combinations of uplink physical resource block pairs and time domain code sequences, and is orthogonal in the frequency domain or the time domain code domain. In FIG. 18 and FIG. 17, uplink physical resource block pairs and time-domain code sequences having the same number are used. However, for convenience of explanation, only the same number is used, and the same uplink physical It is not shown that the resource block pair and the same time domain code sequence are used for the first PUCCH and the second PUCCH.

<Second PUCCH resource allocation method>
The mobile station apparatus 5 that transmits information indicating ACK / NACK using the PUCCH format 3 uses the second PUCCH resource explicitly assigned by the PDCCH to receive ACK / NACK (first reception confirmation response, first A signal obtained by modulating information indicating a second reception confirmation response) is transmitted. The PDCCH explicitly includes control information indicating one resource of the second PUCCH candidate resource. A plurality of second PUCCH candidate resources are allocated to the mobile station apparatus 5 in advance by RRC signaling, and one of a plurality of second PUCCH candidate resources set by RRC signaling using control information included in the PDCCH. One resource is shown.

  In addition, when the mobile station apparatus 5 using cell aggregation detects one PDCCH only in the primary cell and receives one PDSCH in the primary cell, the PUCCH format 1a is used without using the PUCCH format 3. The signal which modulated the information which shows ACK / NACK with respect to the data of PDSCH received with the resource of 1st PUCCH using PUCCH format 1b is transmitted. In this case, the mobile station apparatus 5 makes a determination based on the physical resource that configures the PDCCH in which the first PUCCH resource to be used is detected. When the mobile station apparatus 5 using cell aggregation detects one or more PDCCHs in the primary cell or the secondary cell and receives at least one PDSCH in the secondary cell, the mobile station apparatus 5 uses the PUCCH format 3 to A signal obtained by modulating information indicating ACK / NACK (first reception confirmation response, second reception confirmation response) with respect to PDSCH data received by the PUCCH resource is transmitted. In this case, the mobile station apparatus 5 determines the second PUCCH resource to be used based on the control information included in the detected PDCCH including the PDSCH resource allocation information of the secondary cell.

  Note that control information indicating one resource of the second PUCCH candidate resource included in the PDCCH may be diverted to control information that is normally used for other purposes. Here, the fact that the control information is diverted means that if the control information field is the first, it is interpreted as the first control information, the second case is interpreted as the second control information, Unlike the second case, the first control information and the second control information are different. For example, when the PDCCH is transmitted in the primary cell and includes PDSCH resource allocation information of the primary cell, the control information field interpreted as the control information (TPC command) indicating the transmission power control value of the PUCCH indicates that the PDCCH is the primary When it is transmitted in a cell or a secondary cell and includes PDSCH resource allocation information of the secondary cell, it may be interpreted as control information indicating one resource of the second PUCCH candidate resource. Control information indicating one resource of the second PUCCH candidate resource included in the PDCCH is referred to as ARI (ACK / NACK Resource Indicator).

<Spatial bundling>
Spatial bundling will be described. The mobile station apparatus 5 in which the spatial bundling is set, ACK / NACK (first reception confirmation response) for a plurality of data (transport blocks) (also referred to as codewords) transmitted on the PDSCH to which spatial multiplexing is applied Is subjected to a logical operation to generate information (second reception confirmation response) in which a plurality of first reception confirmation responses are collected. For example, the mobile station device 5 performs a logical product operation as a logical operation. The mobile station apparatus 5 generates an ACK as a second reception confirmation response and transmits it to the base station apparatus 3 when all of the plurality of ACK / NACKs (first reception confirmation response) for performing spatial bundling are ACKs. . The mobile station apparatus 5 generates a NACK as a second reception confirmation response when at least one of a plurality of ACK / NACKs (first reception confirmation response) for performing spatial bundling is a NACK, and the base station apparatus 3 Send to. In the embodiment of the present invention, the mobile station apparatus 5 recognizes whether or not spatial multiplexing is applied to the PDSCH from the transmission mode set by the base station apparatus 3 and the detected PDCCH, and applies to the same PDSCH. Recognize the number of data contained. The mobile station apparatus 5 is set by the base station apparatus 3 as to whether to apply Spatial bundling for each cell. Also, whether to apply Spatial bundling to ACK / NACK for PDSCH for each downlink subframe of each cell may be set, or ACK / NACK for PDSCH for all downlink subframes of each cell. Whether or not to apply spatial bundling to each cell, or whether or not to apply spatial bundling to ACK / NACK for PDSCH for each downlink subframe of each cell. Also good. For simplicity of explanation, a case will be described in which whether or not to apply Spatial bundling to ACK / NACK for PDSCH in all downlink subframes of each cell is described.

  An example of ACK / NACK Spatial bundling will be described. A case will be described in which two data (first data, second data) transmission is set as the transmission mode of a certain cell in the mobile station apparatus 5. For the PDSCH received in a certain downlink subframe of a certain cell, the mobile station apparatus 5 has the ACK / NACK for the first data is ACK and the ACK / NACK for the second data is ACK. An ACK is generated as a second acknowledgment response. When the mobile station apparatus 5 receives PDSCH received in a certain downlink subframe of a certain cell, ACK / NACK for the first data is ACK and ACK / NACK for the second data is NACK, A NACK is generated as a second reception confirmation response. When the mobile station apparatus 5 receives PDSCH received in a certain downlink subframe of a certain cell, the ACK / NACK for the first data is NACK and the ACK / NACK for the second data is ACK. A NACK is generated as a second reception confirmation response. When the mobile station apparatus 5 receives PDSCH received in a certain downlink subframe of a certain cell, the ACK / NACK for the first data is NACK and the ACK / NACK for the second data is NACK. A NACK is generated as a second reception confirmation response. The mobile station apparatus 5 performs the above processing on ACK / NACK for the PDSCH received in all downlink subframes of the cell to which Spatial bundling is set. In the embodiment of the present invention using TDD, the base station apparatus 3 determines how many downlink subframes (including special subframes) and how many uplink subframes are configured in one radio frame. The mobile station apparatus 5 is notified of information indicating the determined subframe configuration. Based on the notified subframe configuration, the mobile station apparatus 5 receives ACK / NACK (data for the plurality of downlink subframes (including special subframes) (first data series, second data series). It is recognized which uplink subframe PUCCH transmits the first reception confirmation response and the second reception confirmation response.

<Overall configuration of base station apparatus 3>
Hereinafter, the configuration of the base station apparatus 3 according to the present embodiment will be described with reference to FIGS. 1, 2, and 3. FIG. 1 is a schematic block diagram showing the configuration of the base station apparatus 3 according to the embodiment of the present invention. As shown in this figure, the base station apparatus 3 includes a reception processing unit 101 (reception unit), a radio resource control unit 103, a control unit 105, and a transmission processing unit 107.

  The reception processing unit 101 demodulates and decodes the received PUCCH and PUSCH signals received from the mobile station apparatus 5 by the reception antenna 109 from the mobile station apparatus 5 using the uplink reference signal in accordance with an instruction from the control unit 105, and provides control information and information. Extract data. The reception processing unit 101 performs a process of extracting UCI for an uplink subframe and an uplink physical resource block in which the own apparatus assigns PUCCH resources to the mobile station apparatus 5. The reception processing unit 101 is instructed from the control unit 105 what processing is to be performed on which uplink subframe and which uplink physical resource block. For example, the reception processing unit 101 multiplies and combines a code sequence in the time domain with respect to a signal of the first PUCCH (PUCCH format 1a, PUCCH format 1b) for ACK / NACK when cell aggregation is not used, frequency Detection processing for performing multiplication and synthesis of code sequences in the region is instructed from control unit 105. For example, the reception processing unit 101 controls detection processing for multiplying and synthesizing a code sequence in the time domain with respect to a second PUCCH (PUCCH format 3) signal for ACK / NACK when cell aggregation is used. Instructed by the unit 105. Reception processing section 101 is instructed by control section 105 to use a frequency-domain code sequence and / or a time-domain code series used for processing for detecting UCI from PUCCH. The reception processing unit 101 outputs the extracted UCI to the control unit 105 and outputs information data to the upper layer. For example, the reception processing unit 101 detects a plurality of ACK / NACK (first reception confirmation response, second reception confirmation response) information from the second PUCCH signal transmitted using the PUCCH format 3 I do. The reception processing unit 101 recognizes the resource of the second PUCCH to be used based on the PDCCH transmitted to the mobile station apparatus 5, demodulates the signal received by the resource, and information on a plurality of ACK / NACK information Is detected. The reception processing unit 101 performs, on the cell to which Spatial bundling is applied, a second reception confirmation response detected from a signal transmitted using PUCCH format 3, in other words, a logical operation in the mobile station apparatus 5. From the information in which a plurality of ACK / NACK information are collected, a process of detecting a first reception confirmation response, in other words, ACK / NACK information for the first and second data sequences of PDSCH is performed. The reception processing unit 101 outputs the extracted UCI to the control unit 105 and outputs information data to the upper layer. Details of the reception processing unit 101 will be described later.

  The radio resource control unit 103 assigns resources to the PDCCH of each mobile station device 5, assigns resources to the PUCCH, assigns downlink physical resource blocks to the PDSCH, assigns uplink physical resource blocks to the PUSCH, and various channel modulation schemes・ Set coding rate, transmission power control value, etc. Radio resource control section 103 also sets a frequency domain code sequence, a time domain code sequence, and the like for PUCCH. Also, the radio resource control unit 103 outputs information indicating the set PUCCH resource allocation to the control unit 105. Moreover, the radio | wireless resource control part 103 sets whether to apply Spatial bundling with respect to each cell regarding transmission of ACK / NACK when using cell aggregation. A part of the information set by the radio resource control unit 103 is notified to the mobile station device 5 via the transmission processing unit 107, for example, information indicating the setting of Spatial bundling, and some parameters related to PUSCH transmission power. Information indicating values and information indicating values of some parameters related to the transmission power of the PUCCH are notified to the mobile station apparatus 5.

  Also, the radio resource control unit 103 sets PDSCH radio resource allocation and the like based on the UCI acquired by the reception processing unit 101 using the PUCCH and input via the control unit 105. For example, when ACK / NACK acquired using PUCCH is input, radio resource control section 103 assigns PDSCH resources for which NACK is indicated by ACK / NACK to mobile station apparatus 5.

  The radio resource control unit 103 configures a plurality of downlink component carriers and a plurality of uplink component carriers with respect to the mobile station device 5 when the own device performs communication using cell aggregation. Further, the radio resource control unit 103 sets a PDSCH CC, a primary cell, and a secondary cell that are associated with the PDCCH CC and the PDCCH CC for the mobile station apparatus 5. The radio resource control unit 103 indicates information indicating which cell is set as the primary cell via the transmission processing unit 107, and indicates a downlink component carrier associated as the PDCCH CC with respect to the PDSCH CC of each secondary cell. Information is output to the control unit 105 so as to notify the mobile station apparatus 5.

  The radio resource control unit 103 outputs various control signals to the control unit 105. For example, the control signal is a control signal indicating allocation of PUCCH resources or a control signal indicating detection processing performed on the PUCCH signal received by the reception processing unit 101. For example, the radio resource control unit 103 outputs a control signal indicating an uplink subframe, an uplink physical resource block, a time domain code sequence, and a frequency domain code sequence as the first PUCCH resource for ACK / NACK. . For example, the radio resource control unit 103 indicates detection processing for performing multiplication and synthesis of a code sequence in the time domain and multiplication and synthesis of a code sequence in the frequency domain on the first PUCCH signal for ACK / NACK. Output a control signal. For example, the radio resource control unit 103 outputs a control signal indicating an uplink subframe, an uplink physical resource block, and a time domain code sequence as a second PUCCH resource (including candidate resources) for ACK / NACK. For example, radio resource control section 103 outputs a control signal indicating a detection process for multiplying and combining a code sequence in the time domain with respect to the second PUCCH signal for ACK / NACK.

  Based on the control signal input from radio resource control section 103, control section 105 assigns downlink physical resource blocks to PDSCH, assigns resources to PDCCH, sets a modulation scheme for PDSCH, and sets coding rates for PDSCH and PDCCH. Control such as setting is performed on the transmission processing unit 107. Also, the control unit 105 generates DCI transmitted using the PDCCH based on the control signal input from the radio resource control unit 103 and outputs the DCI to the transmission processing unit 107. The DCI transmitted using the PDCCH is a downlink assignment, an uplink grant, or the like. The control unit 105 also includes information indicating downlink component carriers and uplink component carriers used for communication, information indicating primary cells, information indicating association between PDSCH CCs and PDCCH CCs, Spatial bundling setting information, first Control is performed so that information indicating the allocation of the PUCCH resource, information indicating the allocation of the candidate resource of the second PUCCH, and the like are transmitted to the mobile station apparatus 5 via the transmission processing unit 107 using the PDSCH. Also, the control unit 105 performs control so that information indicating one resource of the second PUCCH candidate resource is transmitted to the mobile station apparatus 5 via the transmission processing unit 107 using the PDCCH.

  Based on the control signal input from the radio resource control unit 103, the control unit 105 allocates uplink physical resource blocks to the PUSCH, allocates resources to the PUCCH, sets PUSCH and PUCCH modulation schemes, and sets the PUSCH coding rate. Control such as setting, detection processing for PUCCH, and setting of a code sequence for PUCCH is performed on reception processing section 101. In addition, the control unit 105 receives the UCI transmitted from the mobile station apparatus 5 using PUCCH from the reception processing unit 101 and outputs the input UCI to the radio resource control unit 103.

  The transmission processing unit 107 generates a signal to be transmitted using PDCCH and PDSCH based on the control signal input from the control unit 105 and transmits the signal via the transmission antenna 111. The transmission processing unit 107 receives, from the radio resource control unit 103, information indicating downlink component carriers and uplink component carriers used for communication using cell aggregation, information indicating primary cells, and PDSCH CC and PDCCH CC. Information indicating association, Spatial bundling setting information, information indicating second PUCCH candidate resources, information indicating values of some parameters related to transmission power of PUSCH, and some information related to transmission power of PUCCH Information indicating parameter values, information data input from an upper layer, and the like are transmitted to the mobile station apparatus 5 using the PDSCH, and the DCI input from the control unit 105 is transmitted to the mobile station apparatus 5 using the PDCCH. Send to. For the sake of simplification of explanation, it is assumed that the information data includes information on several types of control. Details of the transmission processing unit 107 will be described later.

<Configuration of transmission processing unit 107 of base station apparatus 3>
Hereinafter, details of the transmission processing unit 107 of the base station apparatus 3 will be described. FIG. 2 is a schematic block diagram showing the configuration of the transmission processing unit 107 of the base station apparatus 3 according to the embodiment of the present invention. As shown in this figure, the transmission processing unit 107 includes a plurality of physical downlink shared channel processing units 201-1 to 201-M (hereinafter referred to as physical downlink shared channel processing units 201-1 to 201-M). Physical downlink), a plurality of physical downlink control channel processing units 203-1 to 203-M (hereinafter, physical downlink control channel processing units 203-1 to 203-M are combined). Control channel processing unit 203), downlink pilot channel processing unit 205, multiplexing unit 207, IFFT (Inverse Fast Fourier Transform) unit 209, GI (Guard Interval) insertion unit 211, D / A (Digital / Analog converter) unit 213, transmission RF (Radio Frequency) unit 21 5 and the transmission antenna 111. Since each physical downlink shared channel processing unit 201 and each physical downlink control channel processing unit 203 have the same configuration and function, only one of them will be described as a representative. In the description of the transmission processing unit 107, first, a case where the number of transmission antennas is one (a case where a single data transmission is performed) will be described. A description will be given later of a case where the processing unit to be configured is configured (when two data transmissions are performed).

  As shown in this figure, the physical downlink shared channel processing unit 201 includes a turbo coding unit 219 and a data modulation unit 221, respectively. Also, as shown in this figure, the physical downlink control channel processing unit 203 includes a convolutional coding unit 223 and a QPSK modulation unit 225. The physical downlink shared channel processing unit 201 performs baseband signal processing for transmitting information data to the mobile station apparatus 5 by the OFDM method. The turbo encoding unit 219 performs turbo encoding for increasing the error tolerance of the data at the encoding rate input from the control unit 105 and outputs the input information data to the data modulation unit 221. The data modulation unit 221 uses the data encoded by the turbo coding unit 219 as a modulation method inputted from the control unit 105, for example, QPSK (Quadrature Phase Shift Keying), 16QAM (16-value quadrature amplitude modulation). Modulation with a modulation scheme such as 16 Quadrature Amplitude Modulation) or 64QAM (64 Quadrature Amplitude Modulation) to generate a signal sequence of modulation symbols. The data modulation unit 221 outputs the generated signal sequence to the multiplexing unit 207.

  The physical downlink control channel processing unit 203 performs baseband signal processing for transmitting the DCI input from the control unit 105 in the OFDM scheme. The convolutional coding unit 223 performs convolutional coding for increasing DCI error tolerance based on the coding rate input from the control unit 105. Here, DCI is controlled in bit units. The convolutional coding unit 223 also performs rate matching to adjust the number of output bits for the bits subjected to the convolutional coding processing based on the coding rate input from the control unit 105. The convolutional coding unit 223 outputs the encoded DCI to the QPSK modulation unit 225. The QPSK modulation unit 225 modulates the DCI encoded by the convolutional coding unit 223 using the QPSK modulation method, and outputs the modulated modulation symbol signal sequence to the multiplexing unit 207. The downlink pilot channel processing unit 205 generates a downlink reference signal (also referred to as Cell specific RS) that is a known signal in the mobile station apparatus 5 and outputs the downlink reference signal to the multiplexing unit 207.

  Multiplexer 207 receives a signal input from downlink pilot channel processor 205, a signal input from each physical downlink shared channel processor 201, and a signal input from each physical downlink control channel processor 203. Are multiplexed into the downlink subframe according to the instruction from the control unit 105. A control signal related to downlink physical resource block allocation to the PDSCH and resource allocation to the PDCCH set by the radio resource control unit 103 is input to the control unit 105, and based on the control signal, the control unit 105 performs processing of the multiplexing unit 207. To control.

  Note that the multiplexing unit 207 performs multiplexing of PDSCH and PDCCH by time multiplexing basically as shown in FIG. The multiplexing unit 207 performs multiplexing between the downlink pilot channel and other channels by time / frequency multiplexing. Also, the multiplexing unit 207 performs PDSCH multiplexing for each mobile station device 5 in units of downlink physical resource block pairs, and performs PDSCH using a plurality of downlink physical resource block pairs for one mobile station device 5. Sometimes it multiplexes. Further, multiplexing section 207 multiplexes PDCCH addressed to each mobile station apparatus 5 using resources in the same downlink component carrier. The multiplexing unit 207 outputs the multiplexed signal to the IFFT unit 209.

  IFFT section 209 performs fast inverse Fourier transform on the signal multiplexed by multiplexing section 207, performs OFDM modulation, and outputs the result to GI insertion section 211. The GI insertion unit 211 generates a baseband digital signal including symbols in the OFDM scheme by adding a guard interval to the signal modulated by the OFDM scheme by the IFFT unit 209. As is well known, the guard interval is generated by duplicating a part of the head or tail of the OFDM symbol to be transmitted. The GI insertion unit 211 outputs the generated baseband digital signal to the D / A unit 213. The D / A unit 213 converts the baseband digital signal input from the GI insertion unit 211 into an analog signal and outputs the analog signal to the transmission RF unit 215. The transmission RF unit 215 generates an in-phase component and a quadrature component of the intermediate frequency from the analog signal input from the D / A unit 213, and removes an extra frequency component for the intermediate frequency band. Next, the transmission RF section 215 converts (up-converts) the intermediate frequency signal into a high frequency signal, removes excess frequency components, amplifies the power, and transmits to the mobile station apparatus 5 via the transmission antenna 111. Send.

  A case will be described in which a plurality of transmission antennas are configured and a processing unit that performs spatial multiplexing on the PDSCH is configured. Compared to the configuration in which the number of transmission antennas is one as described in FIG. 2, a plurality of transmission antennas 111 are configured in the base station apparatus 3, and the multiplexing unit 207, IFFT unit 209, GI insertion unit 211, D The base station apparatus 3 includes the same number of / A units 213 and transmission RF units 215 as the number of transmission antennas. Further, the base station apparatus 3 includes a spatial multiplexing processing unit that performs spatial multiplexing processing. The spatial multiplexing processing unit duplicates the data sequence input from the physical downlink shared channel processing unit 201, performs a process of multiplying each duplicated data sequence by a transmission weight (also referred to as precoding), and sets the transmission weight. Each multiplied data series is output to multiplexing section 207 corresponding to each transmission antenna 111. For example, a plurality of signals having an amplitude of 1 and different phases are used as transmission weights. Thereafter, the IFFT unit 209, the GI insertion unit 211, the D / A unit 213, and the transmission RF unit 215 corresponding to each transmission antenna 111 perform processing on the signal output from the spatial multiplexing processing unit, and transmit each transmission. It is transmitted from the antenna 111.

<Configuration of Reception Processing Unit 101 of Base Station Device 3>
Hereinafter, details of the reception processing unit 101 of the base station apparatus 3 will be described. FIG. 3 is a schematic block diagram showing the configuration of the reception processing unit 101 of the base station apparatus 3 according to the embodiment of the present invention. As shown in this figure, the reception processing unit 101 includes a reception RF unit 301, an A / D (Analog / Digital converter) unit 303, a component carrier separation unit 305, and a plurality of uplink component carrier reception processing units. 307-1 to 307-M (hereinafter, each uplink component carrier reception processing unit 307-1 to 307-M is referred to as an uplink component carrier reception processing unit 307). Further, as shown in this figure, the uplink component carrier reception processing section 307 includes a symbol timing detection section 309, a GI removal section 311, an FFT section 313, a subcarrier demapping section 315, a propagation path estimation section 317, and a PUSCH use. Channel equalization section 319, PUCCH propagation path equalization section 321, IDFT section 323, data demodulation section 325, turbo decoding section 327, and physical uplink control channel detection section 329. Since each uplink component carrier reception processing unit 307 has the same configuration and function, only one of them will be described as a representative.

  The reception RF unit 301 appropriately amplifies the signal received by the reception antenna 109, converts it to an intermediate frequency (down-conversion), removes unnecessary frequency components, and amplifies the signal level so that the signal level is appropriately maintained. The level is controlled, and quadrature demodulation is performed based on the in-phase component and the quadrature component of the received signal. The reception RF unit 301 outputs the quadrature demodulated analog signal to the A / D unit 303. The A / D unit 303 converts the analog signal quadrature demodulated by the reception RF unit 301 into a digital signal, and outputs the converted digital signal to the component carrier separation unit 305. The component carrier separation unit 305 separates the received signal for each uplink component carrier of the uplink system bandwidth and outputs the received signal to the reception processing unit 307 for each uplink component carrier.

  The reception processing unit 307 for each uplink component carrier performs demodulation and decoding of PUSCH and PUCCH in the uplink component carrier, and detects information data and UCI.

  The symbol timing detection unit 309 detects a symbol timing based on the signal input from the component carrier separation unit 305, and outputs a control signal indicating the detected symbol boundary timing to the GI removal unit 311. The GI removal unit 311 removes a portion corresponding to the guard interval from the signal input from the component carrier separation unit 305 based on the control signal from the symbol timing detection unit 309 and converts the remaining portion of the signal to the FFT unit 313. Output to. The FFT unit 313 performs fast Fourier transform on the signal input from the GI removal unit 311, performs demodulation of the DFT-Spread-OFDM scheme, and outputs the result to the subcarrier demapping unit 315. Note that the number of points in the FFT unit 313 is equal to the number of points in the IFFT unit of the mobile station apparatus 5 described later.

  Based on the control signal input from control section 105, subcarrier demapping section 315 converts the signal demodulated by FFT section 313 into an uplink reference signal for an uplink pilot channel, a PUSCH signal, and a PUCCH signal. To separate. The subcarrier demapping section 315 outputs the separated uplink reference signal to the propagation path estimation section 317, outputs the separated PUSCH signal to the PUSCH propagation path equalization section 319, and outputs the separated PUCCH signal to the PUCCH To the propagation path equalization unit 321 for use.

  The propagation path estimation unit 317 estimates propagation path fluctuations using the uplink reference signal separated by the subcarrier demapping unit 315 and a known signal. The propagation path estimation unit 317 outputs the estimated propagation path estimation value to the PUSCH propagation path equalization unit 319 and the PUCCH propagation path equalization unit 321. The PUSCH channel equalization unit 319 equalizes the amplitude and phase of the PUSCH signal separated by the subcarrier demapping unit 315 based on the channel estimation value input from the channel estimation unit 317. Here, equalization refers to a process for restoring the fluctuation of the propagation path received by the signal during wireless communication. The PUSCH channel equalization unit 319 outputs the adjusted signal to the IDFT unit 323.

  The IDFT unit 323 performs discrete inverse Fourier transform on the signal input from the PUSCH channel equalization unit 319 and outputs the result to the data demodulation unit 325. The data demodulating unit 325 demodulates the PUSCH signal converted by the IDFT unit 323, and outputs the demodulated PUSCH signal to the turbo decoding unit 327. This demodulation is demodulation corresponding to the modulation method used in the data modulation unit of the mobile station apparatus 5, and the modulation method is input from the control unit 105. The turbo decoding unit 327 decodes information data from the PUSCH signal input from the data demodulation unit 325 and demodulated. The coding rate is input from the control unit 105.

  The PUCCH channel equalization unit 321 equalizes the amplitude and phase of the PUCCH signal separated by the subcarrier demapping unit 315 based on the channel estimation value input from the channel estimation unit 317. The PUCCH channel equalization unit 321 outputs the equalized signal to the physical uplink control channel detection unit 329.

  The physical uplink control channel detection unit 329 demodulates and decodes the signal input from the PUCCH channel equalization unit 321 and detects UCI. The physical uplink control channel detection unit 329 performs processing for separating a signal code-multiplexed in the frequency domain and / or the time domain. The physical uplink control channel detection unit 329 uses the code sequence used on the transmission side, and receives ACK / no signal from the first PUCCH signal code-multiplexed in the frequency domain and / or time domain. Processing for detecting NACK, SR, and CQI is performed. Also, the physical uplink control channel detection unit 329 detects ACK / NACK in the case of using cell aggregation from the second PUCCH signal code-multiplexed in the time domain using the code sequence used on the transmission side. . Specifically, the physical uplink control channel detection unit 329 performs detection processing using a code sequence in the frequency domain, that is, processing for separating a code-multiplexed signal in the frequency domain, for each subcarrier of the first PUCCH. Is multiplied by each code of the code sequence, and then the signal multiplied by each code is synthesized. Specifically, the physical uplink control channel detection unit 329 performs the first PUCCH or the second PUCCH as a detection process using a code sequence in the time domain, that is, a process for separating a code-multiplexed signal in the time domain. A signal for each SC-FDMA symbol of the second PUCCH is multiplied by each code of the code sequence, and then a signal multiplied by each code is synthesized. The physical uplink control channel detection unit 329 sets detection processing for the PUCCH signal based on the control signal from the control unit 105.

  The physical uplink control channel detection unit 329 decodes the second PUCCH signal to which block coding is applied, and uses ACK / NACK (first reception confirmation response, second reception when cell aggregation is used). Acknowledgment) is detected. In addition, the physical uplink control channel detection unit 329 does not know the ACK / NACK (first reception confirmation response) for each data sequence that has been spatially multiplexed from the second reception confirmation response generated using Spatial bundling. Determine if there is.

  Based on the control information (DCI) transmitted from the base station device 3 to the mobile station device 5 using PDCCH and the control information transmitted using PUSCH, the control unit 105 performs subcarrier demapping unit 315, data demodulation Control unit 325, turbo decoding unit 327, propagation path estimation unit 317, and physical uplink control channel detection unit 329. In addition, the control unit 105 determines which resource (uplink subframe, PUSCH, PUCCH transmitted by each mobile station device 5 based on the control information (RRC signaling) transmitted from the base station device 3 to the mobile station device 5 and the PDCCH. It is ascertained whether it is composed of uplink physical resource blocks, frequency domain code sequences, and time domain code sequences.

<Overall configuration of mobile station apparatus 5>
Hereinafter, the configuration of the mobile station apparatus 5 according to the present embodiment will be described with reference to FIGS. 4, 5, and 6. FIG. 4 is a schematic block diagram showing the configuration of the mobile station apparatus 5 according to the embodiment of the present invention. As shown in this figure, the mobile station apparatus 5 includes a reception processing unit 401, a radio resource control unit 403, a control unit 405, and a transmission processing unit 407 (transmission unit). In addition, the control unit 405 includes a first reception confirmation response generation unit 4051, a second reception confirmation response generation unit 4053, and a parameter setting unit 4055.

  The reception processing unit 401 receives a signal from the base station apparatus 3, and demodulates and decodes the received signal in accordance with an instruction from the control unit 405. When the reception processing unit 401 detects a PDCCH signal addressed to itself, the reception processing unit 401 outputs the DCI obtained by decoding the PDCCH signal to the control unit 405. For example, the reception processing unit 401 outputs control information regarding PUCCH resources included in the PDCCH to the control unit 405. In addition, the reception processing unit 401 receives, via the control unit 405, information data obtained by decoding the PDSCH addressed to itself based on an instruction from the control unit 405 after outputting the DCI included in the PDCCH to the control unit 405. To the upper layer. In the DCI included in the PDCCH, the downlink assignment includes information indicating the allocation of PDSCH resources. Also, the reception processing unit 401 outputs the control information generated by the radio resource control unit 103 of the base station apparatus 3 obtained by decoding the PDSCH to the control unit 405, and the radio of the own apparatus via the control unit 405. Output to the resource control unit 403. For example, the control information generated by the radio resource control unit 103 of the base station device 3 includes information indicating a primary cell, Spatial bundling setting information, information indicating a PUCCH candidate resource, and some of the PUCCH transmission power related information. Contains information indicating the value of the parameter.

  Further, the reception processing unit 401 outputs a cyclic redundancy check (CRC) code included in the PDSCH to the control unit 405. Although omitted in the description of the base station apparatus 3, the transmission processing unit 107 of the base station apparatus 3 generates a CRC code from the information data, and transmits the information data and the CRC code by PDSCH. The CRC code is used to determine whether the data included in the PDSCH is incorrect or not. For example, if the information generated from the data using a generator polynomial determined in advance in the mobile station device 5 is the same as the CRC code generated in the base station device 3 and transmitted on the PDSCH, the data is correct. If the information generated from the data using the generator polynomial determined in advance in the mobile station apparatus 5 is different from the CRC code generated in the base station apparatus 3 and transmitted on the PDSCH, the data is incorrect. It is judged. Details of the reception processing unit 401 will be described later.

  The control unit 405 includes a first reception confirmation response generation unit 4051, a second reception confirmation response generation unit 4053, and a parameter setting unit 4055. The control unit 405 confirms the data transmitted from the base station device 3 using the PDSCH and input from the reception processing unit 401, outputs the information data to the upper layer in the data, and the base station device in the data The reception processing unit 401 and the transmission processing unit 407 are controlled based on the control information generated by the third radio resource control unit 103. Further, the control unit 405 controls the reception processing unit 401 and the transmission processing unit 407 based on an instruction from the radio resource control unit 403. For example, the control unit 405 controls the transmission processing unit 407 to transmit ACK / NACK using the second PUCCH candidate resource instructed from the radio resource control unit 403. Further, the control unit 405 controls the reception processing unit 401 and the transmission processing unit 407 based on DCI transmitted from the base station apparatus 3 using the PDCCH and input from the reception processing unit 401. Specifically, the control unit 405 controls the reception processing unit 401 mainly based on the detected downlink assignment, and controls the transmission processing unit 407 mainly based on the detected uplink grant. Also, the control unit 405 controls the transmission processing unit 401 based on the PUCCH transmission power control command included in the downlink assignment and control information indicating one of the second PUCCH candidate resources. The control unit 405 compares the information generated from the data input from the reception processing unit 401 using a predetermined generator polynomial with the CRC code input from the reception processing unit 401, and determines whether the data is incorrect. And ACK / NACK (first reception confirmation response) is generated. Actually, the first reception confirmation response generation unit 4051 and the second reception confirmation response generation unit 4053 of the control unit 405 generate ACK / NACK (first reception confirmation response or second reception confirmation response). Is controlled. Further, the control unit 405 generates SR and CQI based on an instruction from the radio resource control unit 403.

  The first reception confirmation response generation unit 4051 generates ACK / NACK (first reception confirmation response) for each downlink data received by the mobile station apparatus 5. The first reception confirmation response generation unit 4051 receives information generated using a predetermined generation polynomial from the data included in the PDSCH input from the reception processing unit 401 and the CRC code input from the reception processing unit 401. A comparison is made to determine whether the data is incorrect, and an ACK / NACK is generated for each data. The first reception confirmation response generation unit 4051 generates ACK / NACK indicating ACK when the information generated from the data using the predetermined generation polynomial and the CRC code are the same, and generates the predetermined generation When the information generated from the data using the polynomial is different from the CRC code, ACK / NACK indicating NACK is generated.

  The second reception confirmation response generation unit 4053 performs Spatial bundling on the plurality of first reception confirmation responses generated by the first reception confirmation response generation unit 4051, and generates a plurality of first reception confirmation responses. Collected information (second reception confirmation response) is generated. Whether the second reception confirmation response generation unit 4053 applies Spatial bundling to the first reception confirmation response of each cell generated from the received PDSCH data is determined by the base station apparatus 3. It is set based on the information notified. The second reception confirmation response generation unit 4053 set to apply Spatial bundling includes a plurality of downlinks of the same downlink component carrier (frequency domain) (cell) and the same downlink subframe (time domain). A logical operation is performed on a plurality of first reception confirmation responses for a plurality of data, that is, a plurality of data transmitted using spatial multiplexing.

  The parameter setting unit 4055 sets parameter values related to transmission power, such as PUCCH, PUSCH, and uplink pilot channel. The value of the transmission power set in the parameter setting unit 4055 is output to the transmission processing unit 407 by the control unit 405. In addition, the same transmission power control as PUCCH is performed for the uplink pilot channel configured by resources in the same uplink physical resource block as PUCCH. The uplink pilot channel configured with resources in the same uplink physical resource block as PUSCH is subjected to the same transmission power control as PUSCH. The parameter setting unit 4055 is used for a PUSCH, a parameter based on the number of uplink physical resource blocks allocated to the PUSCH, a cell-specific parameter notified in advance from the base station apparatus 3, and a mobile station apparatus-specific parameter, PUSCH. Values such as a parameter based on a modulation scheme, a parameter based on an estimated path loss value, and a parameter based on a transmission power control command notified from the base station apparatus 3 are set. The parameter setting unit 4055 provides the PUCCH with parameters based on the PUCCH signal configuration, cell-specific and mobile station-specific parameters previously notified from the base station apparatus 3, parameters based on the estimated path loss value, and notification A value such as a parameter based on the transmitted power control command is set. In particular, the parameter setting unit 4055 sets the parameter value based on the PUCCH signal configuration to the second PUCCH to which Spatial bundling is applied, and at least the number of first reception confirmation responses subjected to the Spatial bundling process. Set according to. Also, the parameter setting unit 4055 sets the parameter value based on the signal configuration of the PUCCH for the second PUCCH to which Spatial bundling is applied, the number of second reception confirmation responses and the spatial bundling that has not been performed. It is set according to the total number of one acknowledgment response.

  As parameters related to transmission power, parameters specific to cells and mobile station apparatuses are notified from the base station apparatus 3 using the PDSCH, and transmission power control commands are notified from the base station apparatus 3 using the PDCCH. . The transmission power control command for PUSCH is included in the uplink grant, and the transmission power control command for PUCCH is included in the downlink assignment. Note that the control unit 405 controls the signal configuration of the PUCCH according to the type of UCI to be transmitted, and controls the signal configuration of the PUCCH used by the parameter setting unit 4055. Note that various parameters related to transmission power notified from the base station apparatus 3 are appropriately stored in the radio resource control unit 403, and the stored values are input to the parameter setting unit 4057.

  The radio resource control unit 403 stores and holds the control information generated by the radio resource control unit 103 of the base station device 3 and notified from the base station device 3, and receives the reception processing unit 401 via the control unit 405. The transmission processing unit 407 is controlled. That is, the radio resource control unit 403 has a memory function for holding various parameters. For example, the radio resource control unit 403 holds control information related to the allocation of the second PUCCH candidate resource, and the transmission processing unit 407 transmits using any of the candidate resources holding the second PUCCH signal. The control signal is output to the control unit 405. Note that the control unit 405 sets which of the second PUCCH candidate resources to use based on control information included in the PDCCH. Also, the radio resource control unit 403 holds parameters related to PUSCH and PUCCH transmission power, and outputs a control signal to the control unit 405 so as to use parameters notified from the base station apparatus 3 in the parameter setting unit 4055. .

  The transmission processing unit 407 transmits information data and a signal obtained by encoding and modulating UCI to the base station apparatus 3 via the transmission antenna 411 using PUSCH and PUCCH resources in accordance with instructions from the control unit 405. Also, the transmission processing unit 407 sets PUSCH and PUCCH transmission power in accordance with instructions from the control unit 405. For example, the transmission processing unit 407 generates a signal obtained by encoding and modulating a signal indicating the contents of the plurality of second reception confirmation responses, sets the transmission power of the value input from the parameter setting unit 4055, and sets the second A signal is transmitted through the transmission antenna 411 using the PUCCH resource of the first PUCCH. Details of the transmission processing unit 407 will be described later.

<Reception Processing Unit 401 of Mobile Station Device 5>
Hereinafter, details of the reception processing unit 401 of the mobile station apparatus 5 will be described. FIG. 5 is a schematic block diagram showing the configuration of the reception processing unit 401 of the mobile station apparatus 5 according to the embodiment of the present invention. As shown in this figure, the reception processing unit 401 includes a reception RF unit 501, an A / D unit 503, a symbol timing detection unit 505, a GI removal unit 507, an FFT unit 509, a demultiplexing unit 511, a propagation path estimation unit 513, A PDSCH channel compensation unit 515, a physical downlink shared channel decoding unit 517, a PDCCH channel compensation unit 519, and a physical downlink control channel decoding unit 521 are configured. Further, as shown in this figure, the physical downlink shared channel decoding unit 517 includes a data demodulation unit 523 and a turbo decoding unit 525. Also, as shown in this figure, the physical downlink control channel decoding unit 521 includes a QPSK demodulation unit 527 and a Viterbi decoder unit 529. In the description of the reception processing unit 401, processing for acquiring information from a PDSCH transmitted through a single antenna port will be described, and a processing unit for acquiring information from PDSCHs transmitted through a plurality of antenna ports using spatial multiplexing will be described. A description of the configuration will be given later.

  The reception RF unit 501 appropriately amplifies the signal received by the reception antenna 409, converts it to an intermediate frequency (down-conversion), removes unnecessary frequency components, and amplifies the signal so that the signal level is properly maintained. , And quadrature demodulation based on the in-phase and quadrature components of the received signal. The reception RF unit 501 outputs the quadrature demodulated analog signal to the A / D unit 503.

  A / D section 503 converts the analog signal quadrature demodulated by reception RF section 501 into a digital signal, and outputs the converted digital signal to symbol timing detection section 505 and GI removal section 507. Symbol timing detection section 505 detects symbol timing based on the digital signal converted by A / D section 503, and outputs a control signal indicating the detected symbol boundary timing to GI removal section 507. GI removal section 507 removes a portion corresponding to the guard interval from the digital signal output from A / D section 503 based on the control signal from symbol timing detection section 505, and converts the remaining portion of the signal to FFT section 509. Output to. The FFT unit 509 performs fast Fourier transform on the signal input from the GI removing unit 507, performs OFDM demodulation, and outputs the result to the demultiplexing unit 511.

  The demultiplexing unit 511 separates the signal demodulated by the FFT unit 509 into a PDCCH signal and a PDSCH signal based on the control signal input from the control unit 405. The demultiplexing unit 511 outputs the separated PDSCH signal to the PDSCH propagation path compensation unit 515 and outputs the separated PDCCH signal to the PDCCH propagation path compensation unit 519. Also, the demultiplexing unit 511 demultiplexes the downlink resource element in which the downlink pilot channel is arranged, and outputs the downlink reference signal of the downlink pilot channel to the propagation path estimation unit 513. The demultiplexing unit 511 outputs the PDCCH CC signal to the PDCC channel compensation unit 519, and outputs the PDSCH CC signal to the PDSCH channel compensation unit 515.

  The propagation path estimation unit 513 estimates the propagation path variation using the downlink reference signal of the downlink pilot channel separated by the demultiplexing unit 511 and the known signal, and compensates for the propagation path variation. And a channel compensation value for adjusting the phase are output to the channel compensation unit 515 for PDSCH and the channel compensation unit 519 for PDCCH. PDSCH propagation path compensation section 515 adjusts the amplitude and phase of the PDSCH signal separated by demultiplexing section 511 according to the propagation path compensation value input from propagation path estimation section 513. PDSCH propagation path compensation section 515 outputs the signal whose propagation path has been adjusted to data demodulation section 523 of physical downlink shared channel decoding section 517.

  Based on an instruction from the control unit 405, the physical downlink shared channel decoding unit 517 demodulates and decodes the PDSCH and detects information data. Data demodulation section 523 demodulates the PDSCH signal input from propagation path compensation section 515, and outputs the demodulated PDSCH signal to turbo decoding section 525. This demodulation is demodulation corresponding to the modulation method used in the data modulation unit 221 of the base station device 3. The turbo decoding unit 525 decodes information data from the demodulated PDSCH signal input from the data demodulation unit 523 and outputs the decoded information data to the upper layer via the control unit 405. Note that the control information generated by the radio resource control unit 103 of the base station apparatus 3 transmitted using the PDSCH is also output to the control unit 405, and is also output to the radio resource control unit 403 via the control unit 405. The Note that the CRC code included in the PDSCH is also output to the control unit 405.

  PDCCH propagation path compensation section 519 adjusts the amplitude and phase of the PDCCH signal separated by demultiplexing section 511 according to the propagation path compensation value input from propagation path estimation section 513. PDCCH propagation path compensation section 519 outputs the adjusted signal to QPSK demodulation section 527 of physical downlink control channel decoding section 521.

  The physical downlink control channel decoding unit 521 demodulates and decodes the signal input from the PDCCH channel compensation unit 519 as described below, and detects control data. The QPSK demodulator 527 performs QPSK demodulation on the PDCCH signal and outputs the result to the Viterbi decoder 529. The Viterbi decoder unit 529 decodes the signal demodulated by the QPSK demodulator 527 and outputs the decoded DCI to the controller 405. Here, this signal is expressed in bit units, and the Viterbi decoder unit 529 also performs rate dematching in order to adjust the number of bits for which Viterbi decoding processing is performed on the input bits.

  The mobile station apparatus 5 performs processing for detecting DCI addressed to the mobile station apparatus 5 itself. The mobile station apparatus 5 performs a different decoding process on the PDCCH signal for each assumed coding rate, and acquires DCI included in the PDCCH in which no error was detected in the CRC code added to the PDCCH together with the DCI. To do. Such a process is called blind decoding. Note that the mobile station apparatus 5 may perform blind decoding only on a part of the received signals instead of performing blind decoding on all the received signals of the downlink component carrier. A part of the received signal on which the blind decoding is performed is referred to as “Search space”. In addition, a different search space may be defined for each coding rate.

  The control unit 405 determines whether the DCI input from the Viterbi decoder unit 529 is the DCI addressed to itself with no error, and determines that the DCI is addressed to the own device without error. 511, a data demodulator 523, a turbo decoder 525, and a transmission processor 407 are controlled. For example, when the DCI is a downlink assignment, the control unit 405 performs control so that a PDSCH signal is decoded by a downlink component carrier to which resources are allocated to the reception processing unit 401. Note that the CRC code is also included in the PDCCH as in the PDSCH, and the control unit 405 determines whether or not the DCI of the PDCCH is incorrect using the CRC code.

  In addition, when the DCI input from the Viterbi decoder unit 529 is determined to be a downlink assignment addressed to itself, the control unit 405 determines a PUCCH resource used for transmission of a signal indicating ACK / NACK information. For example, when the control unit 405 determines that the DCI input from the Viterbi decoder unit 529 is a downlink assignment including the PDSCH resource allocation information of the secondary cell addressed to the own device, the control unit 405 is included in the downlink assignment. Based on the control information indicating one resource of the second PUCCH candidate resource, the resource of the second PUCCH used for transmission is determined. For example, when the cell aggregation is not used, the control unit 405 determines that the DCI input from the Viterbi decoder unit 529 is a downlink assignment addressed to the own device, and based on the resources used for the PDCCH, A resource of one PUCCH is determined.

  A process of acquiring information from the PDSCH transmitted from the base station apparatus 3 using a plurality of antenna ports using spatial multiplexing will be described. Compared to the configuration of the reception processing unit 401 described with reference to FIG. 5, at least a spatial demultiplexing detection unit is further configured. The spatial demultiplexing detection unit performs processing for combining and separating signals transmitted from the transmission antennas 111 of the base station device 3 using precoding used on the transmission side, and detecting a plurality of data sequences I do. Information indicating precoding is included in the downlink assignment and transmitted. The propagation path estimation unit 513 estimates propagation path fluctuations received by signals transmitted from the transmission antennas 111 based on the downlink reference signals transmitted from the transmission antennas 111 of the base station apparatus 3. For example, the spatial demultiplexing detection unit may be incorporated in the PDSCH channel compensation unit 515. The spatial demultiplexing detection unit uses the estimated value of the propagation path variation received by the signal transmitted by each transmission antenna 111 estimated by the propagation path estimation unit 513, and the propagation path variation of the signal transmitted by each transmission antenna 111. The process of combining and separating is performed together with the compensation. The spatial demultiplexing detection unit outputs the detected plurality of data sequences to the physical downlink shared channel decoding unit.

<Transmission Processing Unit 407 of Mobile Station Device 5>
FIG. 6 is a schematic block diagram showing the configuration of the transmission processing unit 407 of the mobile station apparatus 5 according to the embodiment of the present invention. As shown in this figure, the transmission processing unit 407 includes a plurality of uplink component carrier transmission processing units 601-1 to 601-M (hereinafter referred to as uplink component carrier transmission processing units 601-1 to 601-M). And a component carrier combining unit 603, a D / A unit 605, a transmission RF unit 607, and a transmission antenna 411. Further, as shown in this figure, the uplink component carrier transmission processing section 601 includes a turbo coding section 611, a data modulation section 613, a DFT section 615, an uplink pilot channel processing section 617, and a physical uplink control channel processing section 619. , Subcarrier mapping section 621, IFFT section 623, GI insertion section 625, and transmission power adjustment section 627. The mobile station apparatus 5 includes a transmission processing unit 601 for each uplink component carrier corresponding to the corresponding number of uplink component carriers. Since each uplink component carrier transmission processing section 601 has the same configuration and function, one of them will be described as a representative.

  The uplink component carrier transmission processing unit 601 encodes and modulates information data and UCI, generates a signal to be transmitted using PUSCH and PUCCH in the uplink component carrier, and transmits transmission power of PUSCH and PUCCH. Adjust. The turbo coding unit 611 performs turbo coding for increasing the error tolerance of the data at the coding rate instructed by the control unit 405 and outputs the input information data to the data modulation unit 613. The data modulation unit 613 modulates the code data encoded by the turbo coding unit 611 using a modulation method instructed by the control unit 405, for example, a modulation method such as QPSK, 16QAM, or 64QAM, and converts the signal sequence of modulation symbols. Generate. Data modulation section 613 outputs the generated modulation symbol signal sequence to DFT section 615. The DFT unit 615 performs discrete Fourier transform on the signal output from the data modulation unit 613 and outputs the result to the subcarrier mapping unit 621.

  The physical uplink control channel processing unit 619 performs baseband signal processing for transmitting UCI input from the control unit 405. The UCI input to the physical uplink control channel processing unit 619 is ACK / NACK (first reception confirmation response, second reception confirmation response), SR, and CQI. The physical uplink control channel processing unit 619 performs baseband signal processing and outputs the generated signal to the subcarrier mapping unit 621. The physical uplink control channel processing unit 619 performs different baseband signal processing for the first PUCCH signal and the second PUCCH signal. The physical uplink control channel processing unit 619 encodes UCI information bits to generate a signal. For example, the physical uplink control channel processing unit 619 is an information bit indicating the contents of a plurality of ACK / NACKs (second reception confirmation response and / or a plurality of first reception confirmation responses) when cell aggregation is used. Is applied to generate a signal to be transmitted on the second PUCCH. For example, block coding is performed using a Reed-Muller code. For example, the physical uplink control channel processing unit 619 generates a signal to be transmitted on the first PUCCH by applying repetitive coding to information bits indicating the contents of ACK / NACK when cell aggregation is not used. To do.

  The physical uplink control channel processing unit 619 performs DFT-Spread-OFDM baseband signal processing on the second PUCCH signal, and DFT-Spread-OFDM on the first PUCCH signal. The baseband signal processing of the system is not performed. Here, the baseband signal processing of the DFT-Spread-OFDM method is to perform DFT processing on a UCI signal to convert it to a frequency domain signal, and then place the signal on an arbitrary subcarrier to perform IFFT processing. This means that if the baseband signal processing of the DFT-Spread-OFDM method is not performed, the UCI signal is directly placed on an arbitrary subcarrier and IFFT processing is performed. The physical uplink control channel processing unit 619 generates a signal from information bits of ACK / NACK when cell aggregation is not used, generates a signal from information bits of SR, or generates a signal from information bits of CQI. For example, a signal for the first PUCCH is generated. The physical uplink control channel processing unit 619 generates a signal from information bits of a plurality of ACK / NACKs (second reception confirmation response and / or a plurality of first reception confirmation responses) when cell aggregation is used. In some cases, a signal for the second PUCCH is generated.

  Also, the physical uplink control channel processing unit 619 performs signal processing related to frequency domain code multiplexing and / or time domain code multiplexing on a signal generated from UCI. The physical uplink control channel processing unit 619 uses the frequency domain for the first PUCCH signal generated from the ACK / NACK information bits, SR information bits, or CQI information bits when cell aggregation is not used. Are multiplied by the code sequence instructed by the control unit 405. The physical uplink control channel processing unit 619 implements time-domain code multiplexing on the first PUCCH signal generated from the ACK / NACK information bits or the SR information bits when cell aggregation is not used. Therefore, the code sequence designated by the control unit 405 is multiplied. The physical uplink control channel processing unit 619 is a control unit for realizing time-domain code multiplexing for the second PUCCH signal generated from a plurality of ACK / NACK information bits when cell aggregation is used. Multiply the code sequence indicated by 405.

  Uplink pilot channel processing section 617 generates an uplink reference signal that is a known signal in base station apparatus 3 based on an instruction from control section 405, and outputs the generated uplink reference signal to subcarrier mapping section 621.

  The subcarrier mapping unit 621 converts the signal input from the uplink pilot channel processing unit 617, the signal input from the DFT unit 615, and the signal input from the physical uplink control channel processing unit 619 into the control unit 405. Are arranged on subcarriers according to instructions from, and output to IFFT section 623.

  IFFT section 623 performs fast inverse Fourier transform on the signal output from subcarrier mapping section 621 and outputs the result to GI insertion section 625. Here, the number of points of IFFT section 623 is larger than the number of points of DFT section 615, and mobile station apparatus 5 transmits using PUSCH by using DFT section 615, subcarrier mapping section 621, and IFFT section 623. DFT-Spread-OFDM modulation is performed on the signal. Also, the mobile station apparatus 5 uses the physical uplink control channel processing unit 619, the subcarrier mapping unit 621, and the IFFT unit 623 to perform a DFT-Spread-OFDM scheme for a signal transmitted using the second PUCCH. Realization of modulation. GI insertion section 625 adds a guard interval to the signal input from IFFT section 623 and outputs the signal to transmission power adjustment section 627.

  The transmission power adjustment unit 627 adjusts the transmission power of the signal input from the GI insertion unit 625 based on the control signal from the control unit 405 and outputs the adjusted signal to the component carrier combining unit 603. The transmission power adjustment unit 627 controls the average transmission power of PUSCH, PUCCH, and uplink pilot channel for each uplink subframe. By the processing of the transmission power adjustment unit 627, the second reception confirmation response generation unit 4053 performs a logical operation on the transmission power of the second PUCCH signal including the information of the second reception confirmation response to which the spatial bundling is applied. Control is performed based on a parameter whose value is set according to the number of first reception confirmation responses. Further, by the processing of the transmission power adjustment unit 627, the transmission power of the second PUCCH signal including the information of the second reception confirmation response to which the spatial bundling is applied is generated in the second reception confirmation response generation unit 4053. Control is performed based on a parameter whose value is set according to the number of second acknowledgment responses.

  The component carrier combining unit 603 combines the signals for each uplink component carrier input from the transmission processing unit 601 for each uplink component carrier, and outputs the combined signal to the D / A unit 605. The D / A unit 605 converts the baseband digital signal input from the component carrier combining unit 603 into an analog signal and outputs the analog signal to the transmission RF unit 607. The transmission RF unit 607 generates an in-phase component and a quadrature component of the intermediate frequency from the analog signal input from the D / A unit 605, and removes an extra frequency component for the intermediate frequency band. Next, the transmission RF unit 607 converts (up-converts) the intermediate frequency signal into a high frequency signal, removes excess frequency components, amplifies the power, and transmits to the base station apparatus 3 via the transmission antenna 411. Send.

<Setting parameters related to transmission power>
Setting of parameter values related to transmission power for the second PUCCH used for transmission of ACK / NACK to which Spatial bundling is applied in parameter setting unit 4055 will be described. Parameter setting unit 4055 sets the value of the parameter based on the PUCCH signal configuration in accordance with the number of first reception confirmation responses that have undergone a logical operation in second reception confirmation response generation unit 4053. Furthermore, parameter setting section 4055 sets a parameter value based on the PUCCH signal configuration in accordance with the number of second reception confirmation responses generated by second reception confirmation response generation section 4053.

  FIG. 7 is a diagram for explaining the correspondence between the number of first reception confirmation responses subjected to logical operation and the value of the parameter related to transmission power used in the mobile station apparatus 5 according to the embodiment of the present invention. It is. Here, the parameter related to transmission power is a parameter based on the signal configuration of PUCCH, and the unit of the parameter value related to transmission power is decibel [dB]. In FIG. 7, for simplification of description, the number of first reception confirmation responses (M1, M2, M3, M4) on which a logical operation has been performed is four types, and parameter values (X1, Although X2, X3, and X4) are described using four types, the present invention is not limited to such a case. In FIG. 7, the magnitude relationship of the number of first reception confirmation responses for which a logical operation is performed is M1 <M2 <M3 <M4. In FIG. 7, the magnitude relationship between the parameter values related to transmission power is X1 <X2 <X3 <X4. Parameter setting unit 4055 sets the value of the parameter related to transmission power to X1 when the number of first reception confirmation responses subjected to logical operation is M1. Parameter setting unit 4055 sets the value of the parameter related to transmission power to X2 when the number of first reception confirmation responses subjected to logical operation is M2. Parameter setting unit 4055 sets the value of the parameter related to transmission power to X3 when the number of first reception confirmation responses subjected to logical operation is M3. Parameter setting unit 4055 sets the value of the parameter related to transmission power to X4 when the number of first reception confirmation responses subjected to logical operation is M4.

FIG. 7 shows a case in which the correspondence relationship between the number of first reception confirmation responses subjected to logical operation and the parameter values related to transmission power is managed by a table. Also good. The value of the mathematical expression is the number of first acknowledgments that have undergone a logical operation, the output value is determined by a linear operation according to the input value, and the output value of the mathematical expression is a parameter value related to transmission power. The parameter setting unit 4055 may be used. Equation 1 is an example of a parameter value generation formula based on the PUCCH signal configuration in accordance with the number of first acknowledgments for which logical operations have been performed.

Here, P is a parameter value based on the signal configuration of PUCCH, M is the number of first reception confirmation responses for which a logical operation is performed, and α is a step size. Here, the step size means an output change amount that changes every time the input value increases or decreases by 1 in Equation 1.

  Thus, the parameter setting unit 4055 sets the value of the parameter related to transmission power to a larger value as the number of first reception confirmation responses for which a logical operation is performed increases. In other words, the parameter setting unit 4055 sets the parameter value based on the PUCCH signal configuration in accordance with the rate at which the number of ACK / NACK information bits is compressed by Spatial bundling, and the transmission rate increases as the rate of compression increases. The value of the parameter related to power is set to a larger value, and the transmission power of the second PUCCH signal is set to a larger value. Thereby, when Spatial bundling is applied, the effect when the base station apparatus 3 cannot appropriately acquire the information of the reception confirmation response can be made relatively constant, and an efficient communication system Can be realized. Specifically, as the rate at which the first reception confirmation response is compressed increases, the transmission power of the second PUCCH signal is set to a larger value, and the second reception confirmation response information can be appropriately acquired. The probability that the first acknowledgment is not compressed can be reduced as compared with the case where the rate at which the first acknowledgment is compressed is small, so that the unnecessary retransmission on the PDSCH occurs and the influence on the downlink system throughput is made relatively uniform. can do.

  In the above explanation, the parameter value based on the PUCCH signal configuration is shown only in the case where it is set based on the number of first reception confirmation responses for which logical operation is performed. For the sake of explanation, only such a description has been given. Even if a value other than the number of first acknowledgments for which a logical operation has been performed is used at the same time, a parameter value based on the PUCCH signal configuration is set. Good. For example, the parameter setting unit 4055 further sets a parameter value based on the PUCCH signal configuration according to the number of second reception confirmation responses generated by the second reception confirmation response generation unit 4053.

  FIG. 8 is a diagram illustrating a correspondence relationship between the number of generated second reception confirmation responses and parameter values related to transmission power used in the mobile station apparatus 5 according to the embodiment of the present invention. Here, the parameter related to transmission power is a parameter based on the signal configuration of PUCCH, and the unit of the parameter value related to transmission power is decibel [dB]. In FIG. 8, for the sake of simplification of explanation, the number of second reception confirmation responses (N1, N2, N3, N4) and four parameter values (Y1, Y2, Y3, Y4) related to transmission power are shown. However, the present invention is not limited to such a case. In FIG. 8, the magnitude relation of the number of second reception confirmation responses is N1 <N2 <N3 <N4. In FIG. 8, the magnitude relationship of the parameter values related to transmission power is Y1 <Y2 <Y3 <Y4. The parameter setting unit 4055 sets the value of the parameter related to transmission power to Y1 when the number of second reception confirmation responses is N1. The parameter setting unit 4055 sets the value of the parameter related to transmission power to Y2 when the number of second reception confirmation responses is N2. The parameter setting unit 4055 sets the value of the parameter related to transmission power to Y3 when the number of second reception confirmation responses is N3. The parameter setting unit 4055 sets the value of the parameter related to transmission power to Y4 when the number of second reception confirmation responses is N4.

Equation 2 is an example of a parameter value generation formula based on the PUCCH signal configuration according to the number of second reception confirmation responses. In Equation 2, description will be made including setting of parameter values based on the signal configuration of PUCCH according to the number of first reception acknowledgment responses for which logical operations have been performed.

Here, P is a parameter value based on the PUCCH signal configuration, N is the number of second acknowledgments generated, M is the number of first acknowledgments for which a logical operation has been performed, and α and β are Indicates the step size. Here, the step size means an output change amount that changes every time the related input value increases or decreases by 1 in Equation 2.

  As described above, the parameter setting unit 4055 is generated in addition to setting the value of the parameter related to transmission power to a larger value as the number of first reception confirmation responses subjected to logical operation increases. As the number of second acknowledgments increases, the parameter value related to transmission power is set to a larger value. In other words, the parameter setting unit 4055 sets the parameter value based on the PUCCH signal configuration according to the information amount (payload size) transmitted in the second PUCCH modulation signal, and the information amount increases. The parameter value related to the transmission power is set to a larger value, and the transmission power of the second PUCCH signal is set to a larger value. Thereby, when Spatial bundling is applied, in addition to making it possible to make the influence when the base station device 3 cannot properly acquire the information of the reception confirmation response relatively constant, it is unnecessary. While avoiding an increase in uplink interference, it is possible to satisfy the required quality of the information (payload) of the actually received acknowledgment response.

  In Equation 2, the value is independent of the step size (α) for the number of first reception confirmation responses for which a logical operation has been performed and the step size (β) for the number of second reception confirmation responses generated. May be used. The fact that independent step sizes are used can be expressed as using different setting algorithms. As a result, different values can be set for each step size (α and β), so that transmission power control suitable for the influence on the compression of the first reception confirmation response and the actual transmission can be performed. The transmission power control suitable for the required quality of the information of the reception confirmation response can be realized, and the efficient transmission power control can be performed.

  The parameter setting unit 4055 sets the parameter value related to the transmission power for the second PUCCH used for ACK / NACK transmission to which Spatial bundling is not applied. The PUCCH signal is set according to the number of first reception acknowledgments. Set parameter values based on configuration. This will be described using Equation 2. Regarding the setting of the parameter value related to the transmission power for the second PUCCH used for transmission of ACK / NACK to which Spatial bundling is not applied, the parameter setting unit 4055 uses Equation 2 where N is the number of first reception acknowledgments And the value of P is set with M set to zero.

  In addition, in the mobile station apparatus 5, in a plurality of cells used for cell aggregation, when the spatial bundling is applied to some cells and the spatial bundling is not applied to some cells, the parameter setting unit 4055 The number of first acknowledgments that have undergone logical operations in cells to which Spatial bundling is applied, the number of second acknowledgments that are generated in cells to which Spatial bundling is applied, and Spatial bundling are not applied A parameter value based on the PUCCH signal configuration is set using the number of first acknowledgments generated in the cell. This will be described using Equation 2. The parameter setting unit 4055 includes the number of the second reception confirmation response generated in the cell to which Spatial bundling is applied and the number of the first reception confirmation response generated in the cell to which Spatial bundling is not applied. Using the total value with the number, M sets the value of P using the number of first acknowledgments that have undergone a logical operation in the cell to which Spatial bundling is applied.

  Note that, in the mobile station apparatus 5, in a plurality of downlink subframes, Spatial bundling is applied to PDSCHs of some downlink subframes, and Spatial bundling is applied to PDSCHs of some downlink subframes. If not, the parameter setting unit 4055 determines the number of first acknowledgments for which logical operation is performed in the PDSCH of the downlink subframe to which Spatial bundling is applied, and the PDSCH of the downlink subframe to which Spatial bundling is applied. And the number of first acknowledgments generated in the PDSCH of the downlink subframe to which Spatial bundling is not applied. Parameter values based on the PUCCH signal configuration. This will be described using Equation 2. The parameter setting unit 4055 is configured such that, in Equation 2, N is the number of second reception confirmation responses generated in the PDSCH of the downlink subframe to which Spatial bundling is applied, and the PDSCH of the downlink subframe to which Spatial bundling is not applied. M is used as the sum of the generated number of first acknowledgments and M is the number of first acknowledgments subjected to logical operation in the PDSCH of the downlink subframe to which Spatial bundling is applied, Set the value of P.

  FIG. 9 is a flowchart showing an example of processing related to setting of a parameter value related to transmission power of the mobile station apparatus 5 according to the embodiment of the present invention. For the sake of simplification of explanation, an explanation will be given focusing on the setting of parameter values based on the PUCCH signal configuration for the second PUCCH related to the features of the present invention. What is the parameter based on the PUCCH signal configuration? Detailed description regarding the setting of different parameter values will be omitted as appropriate. The control unit 405 of the mobile station device 5 determines whether or not the Spatial bundling is set (Step S101). When it is determined that Spatial bundling has been set (step S101: YES), the control unit 405 determines the number of first reception confirmation responses subjected to a logical operation in the second reception confirmation response generation unit 4053, and the second reception. The parameter value related to the transmission power of the PUCCH is set according to the number of second reception confirmation responses generated in the confirmation response generation unit 4053 (step S102). When determining that Spatial bundling has not been set (step S102: NO), the control unit 405 transmits PUCCH according to the number of first reception confirmation responses generated by the first reception confirmation response generation unit 4051. A parameter value related to power is set (step S103). After steps S102 and 103, the mobile station apparatus 5 adjusts the transmission power of the second PUCCH in the transmission power adjustment unit 627 using the set parameter value, and transmits a signal using the second PUCCH.

  FIG. 10 shows the configuration of the corresponding downlink radio frame, the cell aggregation, and the spatial binding for ACK / NACK transmitted on a single second PUCCH in the mobile station apparatus 5 according to the embodiment of the present invention. It is a figure which shows an example of a setting. In FIG. 10, ACK / NACK for two downlink subframes (downlink subframe 1, downlink subframe 2, downlink subframe 3, downlink subframe 4) for PDSCH, two cells (primary cell) 1, ACK / NACK for PDSCH of secondary cell 1) is transmitted on a single second PUCCH. Further, FIG. 10 illustrates a case where Spatial bundling is applied to ACK / NACK for PDSCH of all downlink subframes of all cells (Spatial bundling: YES). In addition, FIG. 10 demonstrates the case where two data transmission is set as the transmission mode with respect to a downlink in each cell. A case will be described in which PDSCH is received in all downlink subframes of all cells. Two first acknowledgments are generated for the PDSCH of each downlink subframe of each cell. In FIG. 10, a total of 16 first reception confirmation responses are generated. A logical operation is performed on the first reception confirmation response generated for the PDSCH of each downlink subframe of each cell, and one second reception confirmation response is generated. In FIG. 10, a logical operation is performed on the 16 first reception confirmation responses in total, and eight second reception confirmation responses are generated. In this case, the parameter setting unit 4055 uses 16 as the number of first reception confirmation responses obtained by performing a logical operation on the value of M as the value of M, and is the number of second reception confirmation responses generated. The value of the parameter based on the signal configuration of PUCCH is set by Equation 2 using 8 as the value of N.

  FIG. 11 is a diagram illustrating an example of a configuration of a corresponding downlink radio frame, a configuration of cell aggregation, and a setting of Spatial binding regarding ACK / NACK transmitted by a single second PUCCH. In FIG. 11, ACK / NACK for two downlink subframes (downlink subframe 1, downlink subframe 2, downlink subframe 3, downlink subframe 4) for PDSCH, two cells (primary cell) 1, ACK / NACK for PDSCH of secondary cell 1) is transmitted on a single second PUCCH. In FIG. 11, Spatial bundling is not applied to ACK / NACK for PDSCH of all downlink subframes of primary cell 1 (Spatial bundling: NO), and PDSCH of all downlink subframes of secondary cell 1. This shows a case where Spatial bundling is applied to ACK / NACK for (spatial bundling: YES). In addition, FIG. 11 demonstrates the case where two data transmission is set as the transmission mode with respect to a downlink in each cell. A case will be described in which PDSCH is received in all downlink subframes of all cells. Two first acknowledgments are generated for the PDSCH of each downlink subframe of each cell. In FIG. 11, eight first reception acknowledgments are generated in each cell. A logical operation is performed on the first reception confirmation response generated for the PDSCH of each downlink subframe of the secondary cell 1, and one second reception confirmation response is generated. In FIG. 11, a logical operation is performed on the eight first reception confirmation responses in the secondary cell 1 to generate four second reception confirmation responses. In this case, the parameter setting unit 4055 uses, as the value of M, 8 which is the number of first reception confirmation responses for which logical operation has been performed in the secondary cell 1, and the second reception confirmation response generated in the secondary cell 1. 4 and 12 which is the sum of 8 which is the number of first reception confirmation responses generated in the primary cell 1 (the number of first reception confirmation responses not subjected to logical operation) generated in the primary cell 1. The parameter value based on the PUCCH signal configuration is set according to the number 2 used in the above.

  FIG. 12 is a diagram illustrating an example of a configuration of a corresponding downlink radio frame, a configuration of cell aggregation, and a setting of Spatial binding regarding ACK / NACK transmitted by a single second PUCCH. In FIG. 12, ACK / NACK for two downlink subframes (downlink subframe 1, downlink subframe 2, downlink subframe 3, downlink subframe 4) for PDSCH, two cells (primary cell) 1, ACK / NACK for PDSCH of secondary cell 1) is transmitted on a single second PUCCH. Further, in FIG. 11, Spatial bundling is not applied to ACK / NACK for PDSCH of some downlink subframes (downlink subframe 1 and downlink subframe 2) of primary cell 1 (Spatial bundling: NO). ), ACK / NACK for PDSCH of some downlink subframes (downlink subframe 3 and downlink subframe 5) of primary cell 1 and ACK / NACK for PDSCH of all downlink subframes of secondary cell 1 The case where Spatial bundling is applied to (Spatial bundling: YES) is shown. In addition, FIG. 12 demonstrates the case where two data transmission is set as the transmission mode with respect to a downlink in each cell. A case will be described in which PDSCH is received in all downlink subframes of all cells. Two first acknowledgments are generated for the PDSCH of each downlink subframe of each cell. In FIG. 12, eight first reception confirmation responses are generated in each cell. The first reception confirmation response generated for the PDSCH of the downlink subframe 3 and the downlink subframe 4 of the primary cell 1, and the first response generated for the PDSCH of each downlink subframe of the secondary cell 1 A logical operation is performed on each of the reception confirmation responses to generate one second reception confirmation response. In FIG. 11, a logical operation is performed on four first reception confirmation responses in the primary cell 1 and eight first reception confirmation responses in the secondary cell 1 to generate six second reception confirmation responses. In this case, the parameter setting unit 4055 generates 12 in the primary cell 1 and the secondary cell 1 by using, as the value of M, 12 which is the number of first reception confirmation responses in which the logical operation is performed in the primary cell 1 and the secondary cell 1. 6 that is the number of received second acknowledgments and the first generated for the PDSCH in the downlink subframe (downlink subframe 1, downlink subframe 2) to which Spatial bundling is not applied in the primary cell 1. The value of the parameter based on the signal structure of the PUCCH by the number 2 using 10 which is the sum of 4 which is the number of the reception confirmation responses (the number of the first reception confirmation responses not subjected to the logical operation) as the value of N Set.

  As described above, in the embodiment of the present invention, the mobile station apparatus 5 sets and sets the parameter value related to the transmission power according to the number of first reception confirmation responses for which the logical operation is performed. By using the value of the parameter to control the transmission power of the second PUCCH used for transmission of the signal generated from the information of the plurality of second acknowledgment responses, the second PUCCH is transmitted efficiently. A simple communication system can be realized. In addition, the mobile station device 5 further sets the parameter value related to the transmission power according to the number of the generated second reception acknowledgments, so that the base station device 3 is transmitted from the mobile station device. Information can be appropriately acquired from an uplink signal, and use of unnecessary high transmission power can be avoided. As a result, it is possible to avoid unnecessarily increasing the power consumption of the mobile station apparatus 5, to avoid unnecessarily increasing interference, and to reduce the uplink efficiency of the communication system. Sex can be avoided. The mobile station apparatus 5 sets a parameter value based on the PUCCH signal configuration in accordance with the rate at which the number of ACK / NACK information bits is compressed by Spatial bundling, and the transmission rate increases as the rate of compression increases. When the spatial bundling is applied, the base station apparatus 3 appropriately sets the information of the reception confirmation response by setting the parameter value to be set to a larger value and increasing the transmission power of the second PUCCH signal. Therefore, it is possible to achieve a relatively constant influence when it cannot be obtained, and to realize an efficient communication system. Specifically, the mobile station apparatus 5 increases the transmission power of the second PUCCH signal as the rate at which the first reception confirmation response is compressed increases, and sets the second reception confirmation response information. Probability that cannot be properly acquired can be reduced compared to the case where the rate of compression of the first reception acknowledgment is small, and unnecessary retransmission occurs in the PDSCH, which is given to the downlink system throughput. The influence can be made relatively uniform. The mobile station device 5 increases the transmission power as the number of generated second acknowledgments increases, in other words, as the amount of information (payload size) transmitted by the second PUCCH modulation signal increases. When the value of the related parameter is set to a larger value and the transmission power of the second PUCCH signal is set to a larger value, when Spatial bundling is applied, the base station apparatus 3 displays information on the reception confirmation response. Acknowledgment information that is actually transmitted while avoiding unnecessarily increasing uplink interference, in addition to being able to make the impact of failure to obtain properly relatively constant. The required quality of (payload) can be satisfied.

  Further, in the embodiment of the present invention, the case where the logical operation is performed on the two first reception confirmation responses to generate one second reception confirmation response has been described. The present invention can also be applied to a case where a logical operation is performed on the first reception confirmation response and one second reception confirmation response is generated. Different step sizes α may be used depending on the number of first reception confirmation responses to be subjected to a logical operation when generating one second reception confirmation response. As a result, an appropriate transmission power value corresponding to the compression ratio is set for the second PUCCH signal, and unnecessary retransmission occurs in the PDSCH, and the influence on the downlink system throughput is made relatively uniform. be able to.

  In the embodiment of the present invention, the parameter setting unit 4055 of the mobile station apparatus 5 sets an algorithm for setting a parameter value related to transmission power in accordance with the number of first reception confirmation responses for which a logical operation is performed. Although shown using Equation 1 or Equation 2, different setting algorithms (formulas) may be used. For example, the difference value between the number of first reception confirmation responses generated by the first reception confirmation response generation unit 4051 and the number of second reception confirmation responses generated by the second reception confirmation response generation unit 4053 A setting algorithm may be used in which a parameter value based on the PUCCH signal configuration is set using. A value obtained by multiplying the difference value by the step size γ may be set as a parameter value related to transmission power.

  Moreover, a known predetermined value between the base station apparatus 3 and the mobile station apparatus 5 may be used for each value of the step size (α, β, γ). In addition, the base station device 3 sets values for each value of the step sizes (α, β, γ), and information indicating the set values is transmitted to the mobile station device 5 and received by the mobile station device 5 A value based on the information may be used. Also, for each value of the step size (α, β, γ), a value may be set independently for each mobile station device 5, or a value may be set commonly for a plurality of mobile station devices 5. Good.

  In addition, the mobile station device 5 is not limited to a moving terminal, and the present invention may be realized by mounting the function of the mobile station device 5 on a fixed terminal.

  The characteristic means of the present invention described above can also be realized by mounting and controlling functions in an integrated circuit. That is, the integrated circuit of the present invention is an integrated circuit that causes the mobile station device 5 to perform a plurality of functions by being mounted on the mobile station device 5, and the base station in a plurality of frequency domains and a plurality of time domains. A function of generating a first reception confirmation response for downlink data received from the device, and performing a logical operation on at least two or more first reception confirmation responses, and at least one or more second reception confirmation responses A function for generating a reception confirmation response, a function for setting a parameter value according to the number of the first reception confirmation responses for which a logical operation has been performed, and transmission of a signal indicating the content of the second reception confirmation response The mobile station apparatus 5 exhibits a series of functions including a function of controlling power using a parameter having a value set by the parameter setting unit and transmitting a signal indicating the content of the second reception confirmation response. And characterized in that.

  As described above, the mobile station apparatus 5 using the integrated circuit of the present invention sets the parameter value related to the transmission power according to the number of first reception confirmation responses for which the logical operation is performed, and is set. By using the value of the parameter to control the transmission power of the second PUCCH used for transmission of the signal generated from the information of the plurality of second acknowledgment responses, the second PUCCH is transmitted efficiently. A simple communication system can be realized.

  The operations described in the embodiments of the present invention may be realized by a program. The program that operates in the mobile station apparatus 5 and the base station apparatus 3 related to the present invention is a program (a program that causes a computer to function) that controls the CPU and the like so as to realize the functions of the above-described embodiments related to the present invention. Information handled by these devices is temporarily stored in the RAM at the time of processing, then stored in various ROMs and HDDs, read out by the CPU, and corrected and written as necessary. As a recording medium for storing the program, a semiconductor medium (for example, ROM, nonvolatile memory card, etc.), an optical recording medium (for example, DVD, MO, MD, CD, BD, etc.), a magnetic recording medium (for example, magnetic tape, Any of a flexible disk etc. may be sufficient. In addition, by executing the loaded program, not only the functions of the above-described embodiment are realized, but also based on the instructions of the program, the processing is performed in cooperation with the operating system or other application programs. The functions of the invention may be realized.

  In addition, when distributing to the market, the program can be stored and distributed in a portable recording medium, or transferred to a server computer connected via a network such as the Internet. In this case, the storage device of the server computer is also included in the present invention. Moreover, you may implement | achieve part or all of the mobile station apparatus 5 and the base station apparatus 3 in embodiment mentioned above as LSI which is typically an integrated circuit. Each functional block of the mobile station device 5 and the base station device 3 may be individually chipped, or a part or all of them may be integrated into a chip. Further, the method of circuit integration is not limited to LSI, and may be realized by a dedicated circuit or a general-purpose processor. In addition, when an integrated circuit technology that replaces LSI appears due to progress in semiconductor technology, an integrated circuit based on the technology can also be used.

  The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and the design and the like within the scope not departing from the gist of the present invention are also claimed. Included in the range.

3 base station apparatus 5 (A to C) mobile station apparatus 101 reception processing section 103 radio resource control section 105 control section 107 transmission processing section 109 reception antenna 111 transmission antenna 201 physical downlink shared channel processing section 203 physical downlink control channel processing Unit 205 downlink pilot channel processing unit 207 multiplexing unit 209 IFFT unit 211 GI insertion unit 213 D / A unit 215 transmission RF unit 219 turbo coding unit 221 data modulation unit 223 convolution coding unit 225 QPSK modulation unit 301 reception RF unit 303 A / D unit 305 Component carrier separation unit 307 Uplink component carrier reception processing unit 309 Symbol timing detection unit 311 GI removal unit 313 FFT unit 315 Subcarrier demapping unit 317 Channel estimation unit 319 Channel equalization unit For PUSCH)
321 Channel equalization unit (for PUCCH)
323 IDFT unit 325 Data demodulation unit 327 Turbo decoding unit 329 Physical uplink control channel detection unit 401 Reception processing unit 403 Radio resource control unit 405 Control unit 407 Transmission processing unit 409 Reception antenna 411 Transmission antenna 501 Reception RF unit 503 A / D unit 505 Symbol timing detection unit 507 GI removal unit 509 FFT unit 511 Demultiplexing unit 513 Channel estimation unit 515 Channel compensation unit (for PDSCH)
517 Physical downlink shared channel decoding unit 519 Propagation channel compensation unit (for PDCCH)
521 Physical downlink control channel decoding unit 523 Data demodulation unit 525 Turbo decoding unit 527 QPSK demodulation unit 529 Viterbi decoder unit 601 Uplink component carrier transmission processing unit 603 Component carrier combining unit 605 D / A unit 607 Transmission RF unit 611 Turbo code Unit 613 data modulation unit 615 DFT unit 617 uplink pilot channel processing unit 619 physical uplink control channel processing unit 621 subcarrier mapping unit 623 IFFT unit 625 GI insertion unit 627 transmission power adjustment unit 4051 first reception confirmation response generation unit 4053 Second reception confirmation response generation unit 4055 Parameter setting unit

Claims (8)

A mobile station device that transmits a signal to a base station device,
A first reception confirmation response generating unit that generates a first reception confirmation response to downlink data received from the base station apparatus in a plurality of frequency domains and a plurality of time domains;
Performing a logical operation on at least two or more first reception confirmation responses, and generating at least one or more second reception confirmation responses;
A parameter setting unit that sets a parameter value according to the number of the first reception confirmation responses that have undergone a logical operation;
A transmission unit that controls transmission power of a signal indicating the content of the second reception confirmation response using a parameter having a value set by the parameter setting unit, and transmits a signal indicating the content of the second reception confirmation response And a mobile station device.   The second reception confirmation response generation unit performs a logical operation on a plurality of first reception confirmation responses for a plurality of downlink data spatially multiplexed in the same frequency domain and the same time domain. The mobile station apparatus according to claim 1.   The mobile station apparatus according to claim 1, wherein the parameter setting unit further sets the value of the parameter according to the number of the second reception confirmation responses.   The parameter setting unit has different setting algorithms for setting a parameter according to the number of the first reception confirmation responses for which a logical operation has been performed and for setting a parameter according to the number of the second reception confirmation responses The mobile station apparatus according to claim 3, wherein:   The parameter setting unit uses a setting algorithm in which parameter values are linearly set, sets parameters according to the number of the first reception confirmation responses subjected to logical operations, and the second reception confirmation responses. The mobile station apparatus according to claim 4, wherein linear processing using different step sizes is performed by setting parameters according to the number of the mobile station apparatuses. A communication system comprising a plurality of mobile station devices and a base station device that communicates with the plurality of mobile station devices,
The base station device
A receiving unit for receiving a signal transmitted from the mobile station device;
The mobile station device
A first reception confirmation response generating unit that generates a first reception confirmation response to downlink data received from the base station apparatus in a plurality of frequency domains and a plurality of time domains;
Performing a logical operation on at least two or more first reception confirmation responses, and generating at least one or more second reception confirmation responses;
A parameter setting unit that sets a parameter value according to the number of the first reception confirmation responses that have undergone a logical operation;
A transmission unit that controls transmission power of a signal indicating the content of the second reception confirmation response using a parameter having a value set by the parameter setting unit, and transmits a signal indicating the content of the second reception confirmation response And a communication system comprising: In a communication method used for a mobile station apparatus that transmits a signal to a base station apparatus,
Generating a first acknowledgment for downlink data received from the base station apparatus in a plurality of frequency domains and a plurality of time domains;
Performing a logical operation on at least two or more of the first acknowledgments to generate at least one or more second acknowledgments;
Setting a parameter value in accordance with the number of the first reception confirmation responses for which a logical operation has been performed;
Controlling transmission power of a signal indicating the content of the second reception confirmation response using a parameter having a value set by the parameter setting unit, and transmitting a signal indicating the content of the second reception confirmation response; The communication method characterized by including at least. An integrated circuit that, when mounted on a mobile station device, causes the mobile station device to perform a plurality of functions,
A function of generating a first reception confirmation response to downlink data received from the base station apparatus in a plurality of frequency domains and a plurality of time domains;
A function of performing a logical operation on at least two or more first reception confirmation responses and generating at least one or more second reception confirmation responses;
A function of setting a parameter value in accordance with the number of the first reception confirmation responses for which a logical operation has been performed;
A function of controlling transmission power of a signal indicating the content of the second reception confirmation response using a parameter having a value set by the parameter setting unit, and transmitting a signal indicating the content of the second reception confirmation response; An integrated circuit characterized by causing the mobile station apparatus to exhibit a series of functions including.