JP2012080328A - Mobile station device, wireless communication system and wireless communication method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve such a problem of a mobile station device that, in the prior art, in order to change the frequency position dynamically for the A-SRS of one time transmission, the frequency position must be added to a DCI format and thereby the overhead of the DCI format is increased.SOLUTION: The mobile station device comprises: means for receiving a wireless resource control signal and a downlink control information format notified from a base station device; means for setting the frequency hopping of a sounding reference signal according to the wireless resource control signal; means for transmitting the sounding reference signal to the base station device when a transmission instruction of sounding reference signal is included in the downlink control information format; and means for measuring the number of times of transmission of sounding reference signal.

Description

  The present invention relates to a radio communication system including a mobile station apparatus and a base station apparatus, and more particularly to a transmission control method for a reference signal for channel measurement of a mobile station apparatus.

  Traditionally, cellular mobile radio access schemes and radio network evolution (hereinafter also referred to as “Long Term Evolution (LTE)” or “Evolved Universal Terrestrial Radio Access (EUTRA)”) and wider bandwidth than LTE A wireless access method and wireless network ("Long Term Evolution-Advanced (LTE-A)" or "Advanced Evolved Universal Terrestrial Radio Access (A- EUTRA) ”is also being considered in the 3rd Generation Partnership Project (3GPP).

  As communication systems in LTE, OFDMA (Orthogonal Frequency Division Multiple Access) system that performs user multiplexing using mutually orthogonal subcarriers and SC-FDMA (Single Carrier-Frequency Division Multiple Access) system are being studied. . That is, an OFDMA scheme that is a multicarrier communication scheme is proposed for the downlink, and an SC-FDMA scheme that is a single carrier communication scheme is proposed for the uplink.

  On the other hand, as a communication method in LTE-A, the OFDMA method is used in the downlink, and in the uplink, in addition to the SC-FDMA method, Clustered-SC-FDMA (Clustered-Single Carrier-Frequency Division Multiple Access, DFT-s). -OFDM with Spectrum Division Control, also called DFT-precoded OFDM) is being studied. Here, in LTE and LTE-A, the SC-FDMA system and the Clustered-SC-FDMA system proposed as uplink communication systems are based on the characteristics of the single carrier communication system (depending on the single carrier characteristics), and data (information ) Is transmitted at a low PAPR (Peak to Average Power Ratio: peak power to average power ratio, transmission power).

  In LTE-A, a frequency band used in a general wireless communication system is continuous, whereas a plurality of continuous and / or discontinuous frequency bands (hereinafter referred to as “component carrier (CC)”). Alternatively, it has been proposed to operate as one wide frequency band (also referred to as carrier aggregation) by using a combination of “carrier component (CC: Carrier Component)”. In addition, the base station device and mobile station device (UE: User Equipment) are used for downlink communication and the frequency band used for downlink communication in order to communicate more flexibly using a wide frequency band. It has also been proposed to use different frequency bandwidths (Asymmetric carrier aggregation) (Non-patent Document 1).

  FIG. 7 is a diagram for explaining a radio communication system in which frequency bands are aggregated in the prior art. It is symmetric that the frequency band used for downlink (DL: Down Link) communication and the frequency band used for uplink (UL: Up Link) communication as shown in FIG. It is also called frequency band aggregation (Symmetric carrier aggregation). As shown in FIG. 7, the base station apparatus and the mobile station apparatus can use a wide band composed of a plurality of component carriers by using a plurality of component carriers that are continuous and / or discontinuous frequency bands. Communication can be performed in the frequency band.

  In FIG. 7, as an example, the frequency band (DL system band (width) may be used) for downlink communication having a bandwidth of 100 MHz is five downlink component carriers (bandwidth of 20 MHz) ( DCC1: Downlink Component Carrier1, DCC2, DCC3, DCC4, DCC5). In addition, as an example, five uplink component carriers (UCC1: UCC1: a frequency band used for uplink communication having a bandwidth of 100 MHz (or a UL system band (width)) may be used. Uplink Component Carrier1, UCC2, UCC3, UCC4, UCC5).

  In FIG. 7, downlink channels such as a physical downlink control channel (PDCCH) and a physical downlink shared channel (PDSCH) are arranged in each downlink component carrier.

  The base station apparatus allocates (schedules) downlink control information (DCI: Downlink Control Information) for transmitting a downlink transport block transmitted using PDSCH to the mobile station apparatus using PDCCH. . The base station apparatus transmits the downlink transport block to the mobile station apparatus using PDSCH. Here, in FIG. 7, the base station apparatus can transmit up to five downlink transport blocks (or PDSCH) to the mobile station apparatus in the same subframe.

  Further, uplink channels such as a physical uplink control channel (PUCCH) and a physical uplink shared channel (PUSCH) are arranged in each uplink component carrier.

  The mobile station apparatus uses PUCCH and / or PUSCH to indicate channel state information (CSI: Channel Statement information) indicating a downlink channel state and ACK / NACK (acknowledgment: Positive) in HARQ for the downlink transport block. Information indicating Acknowledgment / Negative Acknowledgment and uplink control information (UCI) such as scheduling request (SR) are transmitted to the base station apparatus. Here, in FIG. 7, the mobile station apparatus can transmit up to five uplink transport blocks (or PUSCH) to the base station apparatus in the same subframe.

  Similarly, FIG. 8 is a diagram for explaining a wireless communication system in which asymmetric frequency bands are aggregated in the prior art. As shown in FIG. 8, the base station apparatus and the mobile station apparatus have different frequency bands used for downlink communication and frequency bands used for uplink communication, and configure these frequency bands. Therefore, it is possible to perform communication in a wide frequency band by using component carriers that are continuous and / or discontinuous frequency bands in combination.

  In FIG. 8, as an example, five downlink component carriers (DCC1, DCC2, DCC3, DCC4, DCC5) having a frequency band of 20 MHz are used for downlink communication having a bandwidth of 100 MHz. It is constituted by. In addition, as an example, it is shown that the frequency band used for uplink communication having a bandwidth of 40 MHz is configured by two uplink component carriers (UCC1, UCC2) having a bandwidth of 20 MHz. ing.

  In FIG. 8, downlink / uplink channels are allocated to downlink / uplink component carriers, respectively. The base station apparatus allocates (schedules) the PDSCH to the mobile station apparatus using the PDCCH, and transmits the downlink transport block to the mobile station apparatus using the PDSCH. Here, in FIG. 8, the base station apparatus can transmit up to five downlink transport blocks (or PDSCH) to the mobile station apparatus in the same subframe.

  Also, the mobile station apparatus uses PUCCH and / or PUSCH to transmit channel state information, information indicating ACK / NACK in HARQ for the downlink transport block, and uplink control information such as a scheduling request to the base station apparatus. Send to. Here, in FIG. 8, the mobile station apparatus can transmit up to two uplink transport blocks (or PUSCH) to the base station apparatus in the same subframe.

  In LTE-A, a sounding reference signal (A-SRS: Aperiodic Sounding Reference Signal) that is transmitted only when a transmission request is notified from the base station apparatus via the PDCCH has been proposed. By including an A-SRS transmission instruction (A-SRS activation / deactivation) in the downlink control information (DCI: Downlink Control Information) format (also referred to as DCI format), the base station device can It can be determined whether or not SRS transmission is requested, and transmission control of A-SRS can be performed dynamically. In addition, the base station apparatus uses a downlink control information format for the downlink (DCI format, downlink grant: Downlink grant, downlink assignment: Downlink assignment) for the mobile station apparatus to -Instructing transmission of SRS, and transmitting A-SRS using downlink control information format (DCI format, uplink grant: UL grant, uplink assignment: also called uplink assignment) for uplink It has been proposed to direct. Furthermore, it has been proposed that an A-SRS transmission instruction is indicated by one bit (multi-bit) of an uplink grant or downlink assignment or a predetermined code point (Non-patent Document 2).

  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 performs the setting of the primary cell and the secondary cell independently for each mobile station apparatus that uses cell aggregation. A primary cell is always composed of a set 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.

“Carrier aggregation in LTE-Advanced”, R1-082464, 3GPP TSG RAN WG1 Meeting # 53bis, Jun 30-Jul 4, 2008. “LTE-A Dynamic Aperiodic SRS-Duration, Timing, and Carrier Aggregation”, R1-103187, 3GPP TSG-RAN1 Meeting # 61, May 10-14, 2010.

  However, in the prior art, a mobile station apparatus instructed to transmit A-SRS by the base station apparatus can transmit A-SRS transmission once. For a mobile station apparatus that cannot cover a wide band, it is necessary to include the frequency position instructing the allocation of A-SRS resources in the DCI format together with the A-SRS transmission instruction, and increase the overhead of the DCI format. Was a problem.

  The present invention has been made in view of the above points, and can perform efficient communication between a base station apparatus and a mobile station apparatus based on A-SRS transmitted from the mobile station apparatus. An object is to provide a mobile station device, a base station device, a wireless communication system, a wireless communication method, and an integrated circuit.

  (1) In order to achieve the above object, the present invention takes the following measures. That is, the radio communication system of the present invention is a radio communication system in which a base station apparatus and a mobile station apparatus perform radio communication, and the base station apparatus transmits a radio resource control signal including a frequency hopping instruction for a sounding reference signal. Notifying the mobile station apparatus, notifying the mobile station apparatus of a downlink control information format including a transmission instruction of a sounding reference signal, and the mobile station apparatus performing frequency hopping of the sounding reference signal according to the radio resource control signal And when the downlink control information format includes an instruction to transmit the sounding reference signal, the sounding reference signal is transmitted to the base station apparatus, and the number of times the sounding reference signal is transmitted is measured. It is characterized by that.

  (2) The radio communication system of the present invention is a radio communication system in which a base station apparatus and a mobile station apparatus perform radio communication, and the base station apparatus has a frequency hopping instruction for a sounding reference signal. The mobile station device is notified of a radio resource control signal including a downlink control information format including a sounding reference signal transmission instruction, and the mobile station device is in accordance with the radio resource control signal. Set frequency hopping of the sounding reference signal, assign a preamble transmission counter for measuring the number of transmissions of the physical random access channel for measuring the number of times of transmission of the sounding reference signal, and transmit the sounding reference signal to the downlink control information format Is included, the sound It transmits a ranging reference signal to the base station apparatus, characterized by measuring the number of times of transmission of the sounding reference signal in the preamble transmission counter.

  (3) The radio communication system of the present invention is a radio communication system in which a base station apparatus and a mobile station apparatus perform radio communication, and the base station apparatus includes a radio resource control signal including a frequency hopping instruction for a sounding reference signal To the mobile station apparatus, and notifies the mobile station apparatus of a downlink control information format including an instruction to transmit a sounding reference signal, and the mobile station apparatus transmits a frequency of the sounding reference signal according to the radio resource control signal. When hopping is set, a scheduling request counter for measuring the number of transmissions of a scheduling request is allocated for measuring the number of times of transmission of a sounding reference signal, and when the downlink control information format includes an instruction to transmit the sounding reference signal The sounding reference signal Transmitted to the station apparatus, characterized by measuring the number of times of transmission of the sounding reference signal in the scheduling request counter.

  (4) The radio communication system of the present invention is a radio communication system in which a base station apparatus and a mobile station apparatus perform radio communication, and the base station apparatus includes a radio resource control signal including a frequency hopping instruction for a sounding reference signal. To the mobile station apparatus, and notifies the mobile station apparatus of a downlink control information format including an instruction to transmit a sounding reference signal, and the mobile station apparatus transmits a frequency of the sounding reference signal according to the radio resource control signal. When hopping is set and the downlink control information format includes the transmission instruction of the sounding reference signal, and the sounding reference signal and the random access preamble are arranged at the same timing, the sounding reference signal and the Physical random access channel to the base Send to the device, characterized by measuring the number of times of transmission of the sounding reference signal in the scheduling request counter.

  (5) The radio communication system of the present invention is a radio communication system in which a base station apparatus and a mobile station apparatus perform radio communication, and the base station apparatus includes a radio resource control signal including a frequency hopping instruction for a sounding reference signal. To the mobile station apparatus, and notifies the mobile station apparatus of a downlink control information format including an instruction to transmit a sounding reference signal, and the mobile station apparatus transmits a frequency of the sounding reference signal according to the radio resource control signal. When hopping is set and the downlink control information format includes an instruction to transmit the sounding reference signal, and the sounding reference signal and the scheduling request are arranged at the same timing, the sounding reference signal and the scheduling Sending a request to the base station device; Characterized by measuring the number of times of transmission of serial SRS in the preamble transmission counter.

  (6) The radio communication system according to the present invention is the radio communication system according to (2), wherein the mobile station apparatus performs physical random access channel within a period in which the number of transmissions of the sounding reference signal is measured. Is transmitted, the number of transmissions of the sounding reference signal is measured by a scheduling request counter.

  (7) The wireless communication system of the present invention is the wireless communication system according to (3), wherein the mobile station device transmits a scheduling request within a period in which the number of transmissions of the sounding reference signal is measured. In this case, the number of transmissions of the sounding reference signal is measured by a preamble transmission counter.

  (8) A radio communication system according to the present invention is the radio communication system according to any one of (1) to (7), in which the base station device moves the downlink control information format including a sounding reference signal transmission instruction to the mobile station. When the downlink control information format includes a transmission instruction for the sounding reference signal, the mobile station apparatus determines the resource allocation position of the sounding reference signal based on the number of transmissions. Calculating, transmitting the sounding reference signal to the base station apparatus, and measuring the number of transmissions of the sounding reference signal.

  (9) The radio communication system of the present invention is the radio communication system according to (2) to (8), in which the mobile station device transmits a scheduling request and a physical random access channel at the same timing. The scheduling request counter or the preamble transmission counter does not measure the number of transmissions of the sounding reference signal.

  (10) The radio communication system of the present invention is the radio communication system according to (2) to (9), in which the mobile station device transmits a scheduling request and a physical random access channel at the same timing. The frequency hopping of the sounding reference signal is not performed.

  (11) The radio communication system according to the present invention is the radio communication system according to any one of (1) to (10), wherein the base station apparatus sends a sounding reference signal by frequency hopping every time a transmission instruction for a sounding reference signal is sent. The resource allocation position is calculated, and channel estimation of the resource allocation position is performed.

  (12) A mobile station apparatus of the present invention is a mobile station apparatus that performs radio communication with a base station apparatus, and receives a radio resource control signal and a downlink control information format notified from the base station apparatus; Means for setting frequency hopping of a sounding reference signal in accordance with the radio resource control signal; and if the downlink control information format includes a transmission instruction for a sounding reference signal, the base station apparatus transmits the sounding reference signal to the base station apparatus. And means for measuring the number of times the sounding reference signal is transmitted.

  (13) A mobile station apparatus of the present invention is a mobile station apparatus that performs radio communication with a base station apparatus, and receives a radio resource control signal and a downlink control information format notified from the base station apparatus; Means for setting frequency hopping of a sounding reference signal in accordance with the radio resource control signal; means for assigning a preamble transmission counter for measuring the number of transmissions of a physical random access channel for measuring the number of times of transmission of a sounding reference signal; and the downlink control Means for transmitting a sounding reference signal to the base station apparatus when the information format includes a sounding reference signal transmission instruction; and a means for measuring the number of transmissions of the sounding reference signal by the preamble transmission counter; And having at least That.

  (14) A mobile station apparatus of the present invention is a mobile station apparatus that performs radio communication with a base station apparatus, and receives a radio resource control signal and a downlink control information format notified from the base station apparatus; Means for setting frequency hopping of a sounding reference signal in accordance with the radio resource control signal; means for assigning a scheduling request counter for measuring the number of transmissions of a scheduling request for measuring the number of transmissions of a sounding reference signal; and the downlink control information format Includes a means for transmitting the sounding reference signal to the base station apparatus, and a means for measuring the number of transmissions of the sounding reference signal by the scheduling request counter. Characterized by having at least That.

  (15) A mobile station apparatus of the present invention is a mobile station apparatus that performs radio communication with a base station apparatus, and receives a radio resource control signal and a downlink control information format notified from the base station apparatus; Means for setting frequency hopping of a sounding reference signal in accordance with the radio resource control signal; and a transmission instruction for the sounding reference signal is included in the downlink control information format, and the sounding reference signal and physical random access at the same timing In the case where a channel is arranged, at least a means for transmitting the sounding reference signal and the physical random access channel to the base station apparatus, and a means for measuring the number of transmissions of the sounding reference signal with a scheduling request counter It is characterized by that.

  (16) A mobile station apparatus of the present invention is a mobile station apparatus that performs radio communication with a base station apparatus, and receives a radio resource control signal and a downlink control information format notified from the base station apparatus; Means for setting frequency hopping of the sounding reference signal in accordance with the radio resource control signal; and the downlink control information format includes a transmission instruction for the sounding reference signal, and the sounding reference signal and the scheduling request are transmitted at the same timing. In the case of being arranged, it comprises at least means for transmitting the sounding reference signal and the scheduling request to the base station apparatus, and means for measuring the number of transmissions of the sounding reference signal with a preamble transmission counter. To do.

  (17) A mobile station apparatus according to the present invention is the mobile station apparatus according to (13), wherein the mobile station apparatus performs physical random access channel within a period in which the number of transmissions of the sounding reference signal is measured. In the case of transmitting, at least means for measuring the number of transmissions of the sounding reference signal with a scheduling request counter is provided.

  (18) A mobile station apparatus according to the present invention is the mobile station apparatus according to (14), wherein the mobile station apparatus transmits a scheduling request within a period in which the number of transmissions of the sounding reference signal is measured. In this case, at least means for measuring the number of transmissions of the sounding reference signal with a preamble transmission counter is provided.

  (19) A radio communication method of the present invention is a radio communication method in which a base station apparatus and a mobile station apparatus perform radio communication, and the base station apparatus includes a radio resource control signal including a frequency hopping instruction for a sounding reference signal. To the mobile station apparatus, to notify the mobile station apparatus of a downlink control information format including an instruction to transmit a sounding reference signal, and the mobile station apparatus performs the sounding according to the radio resource control signal. Setting frequency hopping of a reference signal; if the downlink control information format includes a transmission instruction for the sounding reference signal, transmitting the sounding reference signal to the base station apparatus; and Measuring the number of times the sounding reference signal is transmitted. Characterized in that it contains even a phrase.

  (20) A radio communication method of the present invention is a radio communication method in which a base station apparatus and a mobile station apparatus perform radio communication, and the base station apparatus includes a radio resource control signal including a frequency hopping instruction for a sounding reference signal. To the mobile station apparatus, to notify the mobile station apparatus of a downlink control information format including an instruction to transmit a sounding reference signal, and the mobile station apparatus performs the sounding according to the radio resource control signal. Setting frequency hopping of the reference signal, assigning a preamble transmission counter for measuring the number of transmissions of the physical random access channel for measuring the number of times of transmission of the sounding reference signal, and setting the sounding reference signal to the downlink control information format Includes sending instructions Case, characterized in that it comprises at least a step of transmitting the sounding reference signal to the base station apparatus, a step of measuring the number of times of transmission of the sounding reference signal in the preamble transmission counter, the.

  (21) A radio communication method of the present invention is a radio communication method in which a base station apparatus and a mobile station apparatus perform radio communication, and the base station apparatus includes a radio resource control signal including a frequency hopping instruction for a sounding reference signal To the mobile station apparatus, to notify the mobile station apparatus of a downlink control information format including an instruction to transmit a sounding reference signal, and the mobile station apparatus performs the sounding according to the radio resource control signal. A step of setting frequency hopping of a reference signal, a step of assigning a scheduling request counter for measuring the number of times of transmission of a scheduling request for measuring the number of times of transmission of a sounding reference signal, and an instruction for transmitting the sounding reference signal to the downlink control information format If it is included To is characterized in that it comprises at least a step of transmitting the sounding reference signal to the base station apparatus, a step of measuring the number of times of transmission of the sounding reference signal in the scheduling request counter, a.

  (22) The radio communication method of the present invention is a radio communication method in which a base station apparatus and a mobile station apparatus perform radio communication, and the base station apparatus includes a radio resource control signal including a frequency hopping instruction for a sounding reference signal To the mobile station apparatus, to notify the mobile station apparatus of a downlink control information format including an instruction to transmit a sounding reference signal, and the mobile station apparatus performs the sounding according to the radio resource control signal. A step of setting frequency hopping of a reference signal; and when the downlink control information format includes a transmission instruction for the sounding reference signal and the sounding reference signal and the physical random access channel are arranged at the same timing. , The sounding reference signal and the physical run Transmitting a beam access channel to the base station apparatus, characterized in that it comprises at least the steps of: measuring the number of times of transmission of the sounding reference signal in the scheduling request counter.

  (23) A radio communication method of the present invention is a radio communication method in which a base station apparatus and a mobile station apparatus perform radio communication, and the base station apparatus includes a radio resource control signal including a frequency hopping instruction for a sounding reference signal. To the mobile station apparatus, to notify the mobile station apparatus of a downlink control information format including an instruction to transmit a sounding reference signal, and the mobile station apparatus performs the sounding according to the radio resource control signal. A step of setting frequency hopping of a reference signal, and when the downlink control information format includes a transmission instruction for the sounding reference signal and the sounding reference signal and a scheduling request are arranged at the same timing, Sounding reference signal and the scheduling It transmitting the determined to the base station apparatus, characterized in that it comprises at least the steps of: measuring the number of transmissions of the SRS in the preamble transmission counter.

  (24) The radio communication method according to the present invention is the radio communication method according to (20), in which the mobile station apparatus performs a physical random access channel within a period during which the number of transmissions of the sounding reference signal is measured. Is transmitted, it includes at least a step of measuring the number of transmissions of the sounding reference signal with a scheduling request counter.

  (25) The radio communication method according to the present invention is the radio communication method according to (21), wherein the mobile station device transmits a scheduling request within a period in which the number of transmissions of the sounding reference signal is measured. In this case, the method includes at least a step of measuring the number of transmissions of the sounding reference signal with a preamble transmission counter.

  Thus, the mobile station apparatus can apply frequency hopping by measuring the number of transmissions even if the A-SRS is transmitted once. Further, since the base station apparatus does not need to dynamically notify the mobile station apparatus of the frequency position, it is not necessary to notify the mobile station apparatus including the frequency position in the DCI format, which increases the overhead of the DCI format. Can be avoided.

  ADVANTAGE OF THE INVENTION According to this invention, based on A-SRS transmitted from a mobile station apparatus, the mobile station apparatus, base station apparatus, radio | wireless communication which can perform efficient communication between a base station apparatus and a mobile station apparatus A system, a wireless communication method, and an integrated circuit can be provided.

It is a block diagram which shows schematic structure of the base station apparatus 1 of this invention. It is a block diagram which shows schematic structure of the mobile station apparatus 3 of this invention. It is a figure which shows the example of transmission of SRS by a mobile station apparatus. It is a flowchart which shows the allocation method of the counter for sounding reference signal transmission frequency measurement in 2nd Embodiment. It is a flowchart which shows the allocation method of the counter for sounding reference signal transmission frequency | count measurement in 3rd Embodiment. It is a figure which shows schematic structure of the resource allocation and frequency hopping (FH: Frequency Hopping) of SRS. It is a figure which shows the example of the frequency band aggregation in a prior art. It is a figure which shows the example of asymmetric frequency band aggregation in a prior art.

  Before entering into a specific description of an embodiment of the present invention, an outline of the communication technology used in the present invention will be briefly described.

(Physical channel)
The physical channels used in the present invention include a physical broadcast channel (PBCH), a physical downlink shared channel (PDSCH), a physical downlink control channel (PDCCH), DL-RS (Downlink Reference Signal or Cell-specific Reference Signal), Physical Uplink Shared Channel (PUSCH), Physical Uplink Control Channel (PUCCH), Physical A random access channel (PRACH: Physical Random Access Channel), an uplink reference signal (UL-RS), and the like are included. Note that the embodiments of the present invention described later can be applied even when different physical channel types are added.

  The physical broadcast channel is transmitted for the purpose of reporting control parameters (broadcast information) that are commonly used to mobile station apparatuses in the cell. Broadcast information not notified by PBCH is notified of resources by PDCCH and is transmitted using a physical downlink shared channel. As broadcast information, a cell global ID indicating an individual ID (Identity) of the cell is notified. In the PBCH, a broadcast channel (BCH) is mapped at intervals of 40 milliseconds. The timing of 40 milliseconds is subjected to blind detection in the mobile station apparatus. That is, explicit signaling is not transmitted to the mobile station apparatus for presenting the PBCH timing. In addition, a subframe including PBCH can be decoded only by the subframe (self-decodable).

  The physical downlink control channel is a downlink channel transmitted from the base station apparatus to the mobile station apparatus, and is a hybrid automatic for PDSCH resource allocation and downlink data (DL-SCH: Downlink-Shared Channel). Downlink Assignment composed of retransmission request (HARQ: Hybrid Automatic Repeat reQuest) information, physical uplink shared channel (PUSCH) resource allocation, uplink data (UL-SCH) : Channel used for notifying the mobile station apparatus of downlink control information (DCI) such as uplink transmission permission (uplink grant) which is HARQ information for Uplink-Shared Channel (uplink shared channel) It is. Moreover, PDCCH is comprised from several control channel element (CCE: Control Channel Element), and a mobile station apparatus receives PDCCH from a base station apparatus by detecting PDCCH comprised from CCE. This CCE is composed of a plurality of resource element groups (REG: Resource Element Group, also called mini-CCE) distributed in the frequency and time domains. Here, the resource element is a unit resource composed of one OFDM symbol (time component) and one subcarrier (frequency component).

  A plurality of formats are prepared for the downlink control information transmitted on the physical downlink control channel. A format of downlink control information (DCI) is called a DCI format (DCI format). For example, the DCI format of the uplink grant is a DCI format 0 that is used when the mobile station device 3 transmits the PUSCH through one transmission antenna port, and the mobile station device 3 uses the MIMO (Multiple Input Multiple Output) for the PUSCH. A DCI format 0A and the like used for transmission by multiplexing (SM: Spatial Multiplexing) are prepared.

  Also, the DCI format for downlink assignment is more than DCI format 1 and DCI format 1 used when the base station apparatus transmits PDSCH using one transmission antenna port or a plurality of transmission antenna ports using the transmission diversity scheme. DCI format 1A having a smaller number of bits, DCI format 1C having a smaller number of bits than the DCI format 1A used for radio resource allocation such as paging information, and the case where the base station apparatus transmits PDSCH by SM using MIMO. DCI format 2 and the like are prepared. In DCI format 0 and DCI format 1A, a flag (Flag for format 0 / format 1A differentiation) is used to make the sizes of the two DCI formats the same by inserting bits into the smaller number of bits and to identify the formats. Include.

  Specifically, DCI format 0, which is an uplink grant, includes PDCCH format identification (Flag for format 0 / format 1A differentiation) information, frequency hopping flag (Frequency hopping flag), resource block allocation and hopping resource allocation (Resource block assignment and hopping resource allocation) information, modulation and coding scheme and redundancy version information, NDI (New Data Indicator) information, transmission power control command (TPC command for scheduled PUSCH) information for scheduled PUSCH, Control information such as cyclic shift for DM-RS (Cyclic shift for DM-RS) information, CQI transmission instruction (CQI request) information, padding bit (0 padding) information, cyclic redundancy check (CRC) information, etc. Field, control information field, Distribution field comprised, with bit field referred to).

  The PDCCH format identification information is information indicating the type of DCI format of the downlink control information, that is, whether it is DCI format 0 or DCI format 1A. Resource block allocation and hopping resource allocation information are information indicating resource allocation in the case of hopping and resource block allocation of PUSCH. The modulation coding scheme and redundancy version information are information indicating the PUSCH modulation scheme, coding rate, and redundancy version. The NDI information is information indicating whether the PUSCH is an initial transmission or a retransmission. The PUSCH transmission power control command information is information used for PUSCH transmission power control. DM-RS cyclic shift information is information indicating a cyclic shift of DM-RS. Padding bit (0 padding) information is a bit inserted to make the sizes of DCI format 0 and DCI format 1A the same, and the value is set to “0”. The CQI transmission instruction information can instruct the mobile station apparatus to allocate the CQI using the PUSCH resource and dynamically transmit to the base station apparatus when the base station apparatus requests the CQI. The CQI at this time is also referred to as an aperiodic CQI (A-CQI).

  Specifically, the DCI format 1A, which is a downlink assignment, includes PDCCH format identification (Flag for format 0 / format 1A differentiation) information, virtual resource block (VRB) centralized / distributed arrangement identification (Localized / Distributed VRB assignment flag) information, resource block assignment information, modulation and coding scheme (MCS) information, HARQ process number information, NDI (New Data Indicator) information, redundancy Control information (field, RV: Redundancy Version) information, PUCCH transmission power control (TPC) command information, padding bit (0 padding) information, cyclic redundancy check (CRC) information, etc. Control information field, information field, and bit field It consists referred to).

  The PDCCH format identification information is information indicating the type of DCI format of the downlink control information, that is, whether it is DCI format 0 or DCI format 1A. The virtual resource block centralized / distributed layout identification information is information indicating a method (centralized layout or distributed layout) for associating the virtual resource block indicated by the resource block layout information with the actual resource block. The resource block arrangement information is information indicating a virtual resource block assigned to the PDSCH. The modulation and coding scheme information is information relating to the PDSCH modulation scheme and coding rate, and the amount of downlink data transmitted on the PDSCH. The HARQ process number (HARQ process number) information is information indicating which number of HARQ process the downlink data transmitted on the PDSCH corresponding to the DCI format 1A corresponds to. The NDI information is information indicating whether the PDSCH is an initial transmission or a retransmission. The redundancy version information is information indicating which part of the bit sequence is transmitted among the bit sequences in which the downlink data is encoded. The PUCCH transmission power control command is information used for PUCCH transmission power control. Padding bit (0 padding) information is a bit inserted to make the sizes of DCI format 0 and DCI format 1A the same, and the value is set to “0”.

  Since the DCI format used for group scheduling for a plurality of mobile station apparatuses needs to be received by a plurality of mobile station apparatuses, all mobile station apparatuses try to search (detect) PDCCH (CSS: Common Search Space) Here, a PDCCH addressed to a certain mobile station device is arranged in a mobile station device specific search space (USS) and a common search region where a certain mobile station device tries to search (detect) the PDCCH.

  The base station apparatus assigns a sequence obtained by scrambling a CRC code generated based on DCI with RNTI (Radio Network Temporary Identity) to DCI, and transmits the DCI to the mobile station apparatus. The mobile station apparatus changes the interpretation of DCI depending on whether the CRC code is scrambled with any RNTI. For example, if the DCI is scrambled with the CRC code by C-RNTI (Cell-RNTI) or SPS (Semi Persistent Scheduling) C-RNTI assigned from the base station apparatus, the mobile station apparatus It is judged that it is DCI.

  The PDCCH is encoded (Separate Coding) separately for each mobile station apparatus and for each type. That is, the mobile station apparatus detects a plurality of PDCCHs, and acquires downlink resource allocation, uplink resource allocation, and other control information. Each PDCCH is assigned a CRC value scrambled by RNTI, and the mobile station apparatus descrambles a CRC scrambled by RNTI for each set of CCEs that may constitute PDCCH. (Descramble) is performed, and the CRC value is acquired. Then, CRC is performed using the acquired CRC value, and the PDCCH in which the CRC is successful is acquired as the PDCCH addressed to the own apparatus. In addition, when the scrambled CRC is scrambled with the RNTI assigned to the other device using the RNTI assigned to the own device, the correct CRC value cannot be obtained, so that it is recognized as the PDCCH addressed to the own device. do not do. This is also referred to as blind detection, and the range of CCE sets in which the mobile station apparatus may perform blind detection is referred to as a search space (Search Space). That is, the mobile station apparatus performs blind detection on CCEs in the search area, and detects PDCCH addressed to itself.

  The physical downlink shared channel is a channel used to transmit downlink data (DL-SCH: also called downlink shared channel) or paging information.

  The downlink reference signal is transmitted from the base station apparatus to the mobile station apparatus using the downlink. The mobile station apparatus determines downlink reception quality by measuring a downlink reference signal. The reception quality is notified to the base station apparatus using PUCCH or PUSCH as a channel quality indicator (CQI) which is a quality information indicator. The base station apparatus performs downlink communication scheduling for the mobile station apparatus based on the CQI notified from the mobile station apparatus. The reception quality includes signal-to-interference power ratio (SIR), signal-to-interference plus noise ratio (SINR), and signal-to-noise power ratio (SNR). Signal-to-noise ratio (CIR), carrier-to-interference ratio (CIR), block error rate (BLER), path loss (PL), and the like can be used.

  The physical uplink shared channel is a channel mainly used for transmitting uplink data (UL-SCH: Uplink Shared Channel, uplink shared channel). When the base station apparatus schedules the mobile station apparatus, channel state information (downlink channel quality indicator (CQI), precoding matrix indicator (PMI), rank indicator (RI: Rank Indicator)) and HARQ positive acknowledgment (ACK: Acknowledgement) / negative acknowledgment (NACK: Negative Acknowledgement) for downlink transmission are also transmitted using PUSCH. Here, uplink data (UL-SCH) indicates transmission of user data, for example, and UL-SCH is a transport channel. In UL-SCH, HARQ and dynamic adaptive radio link control are supported, and beamforming can be used. UL-SCH supports dynamic resource allocation and quasi-static resource allocation.

  The physical uplink control channel is a channel used for transmitting uplink control information (UCI). Here, UCI (also referred to as control data) is, for example, channel state information (CQI, PMI, RI) transmitted (feedback) from the mobile station apparatus to the base station apparatus, and the mobile station apparatus transmits uplink data. This includes a scheduling request (SR: Scheduling Request) for requesting allocation of resources for transmission (requesting transmission on UL-SCH), HARQ ACK / NACK for downlink transmission, and the like.

  The uplink reference signal is transmitted from the mobile station device to the base station device. UL-RS includes a sounding reference signal (SRS) and a demodulation reference signal (DM-RS). The SRS, which is a channel measurement reference signal, is measured by the base station apparatus to determine the reception quality of the uplink radio transmission signal of the mobile station apparatus, and uplink scheduling and uplink timing synchronization based on the reception quality are performed. Used for adjustment. Also, DM-RS is transmitted together with PUSCH or PUCCH, calculates a fluctuation amount of amplitude, phase or frequency of PUSCH or PUCCH signal, and a reference signal for demodulating the signal transmitted using PUSCH or PUCCH Also used as

  The transmission bandwidth of DM-RS matches the transmission bandwidth of PUSCH or PUCCH, but the transmission bandwidth of SRS is set independently of DM-RS. That is, the SRS transmission bandwidth does not necessarily match the PUSCH or PUCCH transmission bandwidth, and is preset by the base station apparatus. In addition, frequency hopping is applied to the SRS in the time axis direction. SRS can obtain a frequency diversity effect and an interference averaging effect by using frequency hopping. In the SRS, radio resources are distributed in the frequency axis direction (comb arrangement: also referred to as a transmission comb). For example, radio resources can be arranged every other subcarrier in the frequency axis direction, and a plurality of mobile station apparatuses can be arranged at the same transmission timing by changing the positions of combs (for example, comb 0 and comb 1). Thus, it is possible to perform frequency division multiple access (FDMA) for the SRS.

  A-SRS is a reference signal for channel measurement transmitted when the base station apparatus requests transmission, and a subframe for transmitting A-SRS may be set by the base station apparatus using PDCCH. It may be set using a radio resource control signal. Moreover, the sub-frame which transmits A-SRS may be set using a broadcast channel by the base station apparatus. Here, the radio resource control signal is transmitted at intervals of, for example, about 100 milliseconds to 200 milliseconds.

  Moreover, P-SRS is a reference signal for channel measurement transmitted according to a transmission cycle preset by the base station apparatus, and a subframe for transmitting P-SRS is a radio resource control signal transmitted by the base station apparatus. It may be set using a broadcast channel or may be set using a broadcast channel. In addition, setting information (SRS configuration) related to SRS parameters such as the transmission period and transmission bandwidth of each of A-SRS and P-SRS is included in the radio resource control signal after being set in advance by the base station apparatus. It may be transmitted to the device. Also, the mobile station apparatus calculates the number of transmissions from a transmission radio frame, a transmission subframe, and a transmission period in P-SRS, and calculates a frequency transmission position (frequency position) by frequency hopping using the number of transmissions.

  In addition, SRS subframes (subframes for transmitting A-SRS and P-SRS) that are subframes for transmitting SRS may be set for each cell or for each mobile station apparatus. . The subframes for transmitting A-SRS and P-SRS may be transmitted using the same subframe or may be transmitted using different subframes. For example, the base station apparatus may set a subframe for transmitting A-SRS for each mobile station apparatus and set a subframe for transmitting P-SRS for each cell. Here, the SRS subframe set for each cell is called a cell-specific SRS subframe, and the SRS subframe set for each mobile station device is called a mobile station device-specific SRS subframe. As another example, the base station apparatus sets a subframe for transmitting P-SRS for each cell, and sets a part of the subframe for transmitting P-SRS as a subframe for transmitting A-SRS for each cell or You may set for every mobile station apparatus.

  FIG. 3 is a diagram illustrating an example of SRS (P-SRS, A-SRS) transmission by the mobile station apparatus. In FIG. 3, the horizontal axis indicates a subframe (time). The vertical axis indicates the frequency (frequency band). Here, FIG. 3 shows transmission of SRS in one uplink component carrier by the mobile station apparatus as an example.

  As illustrated in FIG. 3, for example, the base station apparatus instructs (sets) transmission of SRS (P-SRS, A-SRS) for each uplink component to the mobile station apparatus. In accordance with an instruction from the base station apparatus, SRS (P-SRS, A-SRS) can be transmitted to the base station apparatus for each uplink component. That is, the base station apparatus can set the P-SRS parameter and / or the A-SRS parameter in the mobile station apparatus for each uplink component.

  Here, each SC-FDMA symbol to which the mobile station apparatus maps an uplink signal is used for a different purpose. For example, when the mobile station apparatus maps an uplink signal to seven SC-FDMA symbols (seven SC-FDMA symbols from No. 0 to No. 6) and transmits them to the base station apparatus, SRS (P-SRS, A -SRS) is mapped to the sixth SC-FDMA symbol.

  Hereinafter, for the sake of simplicity, it is described that the mobile station apparatus transmits SRS (P-SRS, A-SRS) to the base station measures in the subframe, but the SRS (P-SRS, A-SRS) is subframe. It may be mapped to a certain SC-FDMA symbol and transmitted to the base station apparatus. Further, as described below, the transmission of P-SRS and the transmission of A-SRS occur simultaneously (the transmission of P-SRS and the transmission of A-SRS collide). It may also indicate that SRS transmissions occur simultaneously (collisions) at the symbol level.

  In FIG. 3, the base station apparatus sets subframe n−2, subframe n, subframe n + 2, subframe n + 4, subframe n + 6, subframe n + 8, and subframe n + 10 as SRS subframes to the mobile station apparatus. It shows that. The mobile station apparatus can transmit SRS (P-SRS, A-SRS) to the base station apparatus in the SRS subframe set by the base station apparatus.

  In addition, the mobile station apparatus uses a subframe after a predetermined subframe (for example, a subframe after 4 subframes) in which a DCI format including an A-SRS transmission instruction and a parameter is notified from the base station apparatus. -SRS can be transmitted. Also, the mobile station apparatus can transmit the first SRS subframe (SRS can be transmitted) after the subframe in which the DCI format (which may be PDCCH) including the A-SRS transmission instruction and parameters is notified from the base station apparatus. A-SRS can be transmitted in (subframe).

  In FIG. 3, the mobile station apparatus transmits P-SRS (indicated by a network line) according to an instruction from the base station apparatus, subframe n-2, subframe n + 2, subframe n + 4, subframe n + 6, subframe n + 10. Indicates that the data is being transmitted to the base station apparatus. That is, the mobile station apparatus periodically transmits P-SRS to the base station apparatus according to the interval (every 2 subframes, every 2 ms) set by the base station apparatus (every 2 subframes, every 2 ms). .

  Here, the mobile station apparatus is a part of the band C (subband C is divided into bands C) according to the transmission bandwidth (SRS transmission bandwidth) set by the base station apparatus in the subframes n + 4 and n + 10. P-SRS is transmitted to the base station apparatus in band C-1 (which is a part). Also, the mobile station apparatus uses a part of band C according to the transmission bandwidth (SRS transmission bandwidth) set by the base station apparatus in subframe n−2, subframe n + 2, subframe n + 6, and subframe n + 10. P-SRS is transmitted to the base station apparatus in a certain band C-2 (which is a part of a band obtained by dividing band C). Here, the order in which the mobile station apparatus transmits P-SRS in a certain band (band C-1 and band C-2) is defined in advance (may be set by the base station apparatus). Moreover, the base station apparatus can set to a mobile station apparatus so that P-SRS may be transmitted only once.

  Also, FIG. 3 shows that the mobile station apparatus transmits A-SRS (indicated by diagonal lines) to the base station apparatus in subframe n and subframe n + 8 according to the instruction from the base station apparatus. Yes.

  Here, the mobile station apparatus transmits A-SRS to the base station apparatus in band A according to the transmission bandwidth (SRS transmission bandwidth) set by the base station apparatus in subframe n. In addition, the mobile station apparatus transmits A-SRS in band B to the base station apparatus in subframe n + 8 according to the transmission bandwidth (SRS transmission bandwidth) set by the base station apparatus.

  In FIG. 3, subframe n and subframe n + 8 indicate subframes in which transmission of P-SRS and transmission of A-SRS occur simultaneously. In FIG. 3, when the transmission of P-SRS and the transmission of A-SRS occur simultaneously, the mobile station apparatus does not transmit (drops) the P-SRS and transmits the A-SRS to the base station apparatus. Can be sent. Here, when transmission of P-SRS and transmission of A-SRS occur at the same time, the mobile station apparatus can also multiplex P-SRS and A-SRS and transmit them together to the base station apparatus. For example, when the transmission of P-SRS and the transmission of A-SRS occur simultaneously, the mobile station apparatus performs code multiplexing (cyclic shift multiplexing) of P-SRS and A-SRS, and sends them to the base station apparatus. Can be sent.

  Here, in FIG. 3, as an example, the mobile station apparatus transmits SRS (P-SRS, A-SRS) in all SRS subframes set by the base station apparatus. When transmission of SRS is not instructed by the base station apparatus, SRS is not transmitted. That is, the mobile station apparatus does not have to transmit SRS in all SRS subframes set by the base station apparatus.

  The physical random access channel is a physical channel used for transmitting a random access preamble and has a guard time. The PRACH is mainly used for the mobile station apparatus to synchronize with the base station apparatus, and is used for initial access, handover, reconnection request, and scheduling request. When the mobile station apparatus transmits a physical random access channel (random access preamble) to the base station apparatus, the mobile station apparatus measures the number of transmissions with a preamble transmission counter and starts a protection timer. When the protection timer reaches the expiration time before the response to the physical random access channel (RAR: Random Access Response) is notified to the mobile station apparatus, the mobile station apparatus transmits the physical random access channel to the base station apparatus. The physical random access channel is retransmitted by determining that it has not been reached. At that time, the number of transmissions is measured by the preamble transmission counter. When the number of transmissions reaches a predetermined number, it is determined that a random access problem has occurred, and the radio resource control layer is notified that the random access problem has occurred.

  The scheduling request is information that the mobile station apparatus requests the base station apparatus to allocate PUSCH resources. The mobile station apparatus transmits SR when information data to be transmitted accumulates in its own buffer and requests resource allocation for PUSCH. Also, the mobile station apparatus transmits the SR to the base station apparatus using the PUCCH allocated in advance from the base station apparatus. Note that the base station apparatus allocates periodic resources for the mobile station apparatus to arrange the SR when communication connection with the mobile station apparatus starts. When the mobile station apparatus transmits a scheduling request to the base station apparatus, the mobile station apparatus measures the number of transmissions with a scheduling request counter and starts a protection timer. If the protection timer reaches the expiration time before the response to the scheduling request is notified to the mobile station apparatus, the mobile station apparatus determines that the scheduling request has not reached the base station apparatus and resends the scheduling request. To do. At that time, the number of transmissions is measured by a scheduling request counter. When the number of transmissions reaches a predetermined number, it notifies the radio resource control layer that PUCCH / SRS has been released (released), clears the configured downlink assignment and uplink grant, and performs random access. initialize.

(SRS resource allocation and frequency hopping)
FIG. 6 is a diagram illustrating a schematic configuration of SRS resource allocation and frequency hopping (FH). In the figure, the horizontal axis is time, and the vertical axis is frequency. The left side of the figure shows an example of SRS resource allocation. In the example on the left side of the figure, 14 symbols are arranged in the time axis direction. Seven symbols correspond to one slot, and the length of one slot is 0.5 milliseconds (ms). Further, 14 symbols (corresponding to 2 slots) correspond to 1 subframe, and the length of 1 subframe is 1 millisecond. Thus, in the uplink signal in which one subframe is composed of 14 symbols, the SRS is arranged in the 14th symbol (also referred to as an SRS symbol). The SRS resource (bandwidth in the frequency axis direction) arranged in the 14th symbol is set in the base station apparatus according to the uplink system bandwidth and the transmission power of the mobile station apparatus. Further, the PRACH can be allocated with the bandwidth and the time symbol length being changed according to the type and format of the message to be transmitted. DM-RSs are arranged in the fourth and eleventh symbols (also referred to as DM-RS symbols) when one subframe is composed of 14 symbols, and the DM-RS transmission bandwidth is the PUSCH transmission band. Matches the width.

  Further, frequency hopping that changes the frequency position (frequency position) every time transmission is applied to the time axis direction. The right side of the figure shows an example of SRS frequency hopping. On the right side of the figure, SRS is transmitted every transmission period T. As shown in the figure, hopping is performed in the frequency direction every period T (that is, every time SRS is transmitted). The mobile station apparatus can apply frequency hopping when the hopping bandwidth, which is one of the SRS setting information, is set to a bandwidth wider than the SRS transmission bandwidth. That is, the frequency hopping instruction in SRS is to set a bandwidth wider than the SRS transmission bandwidth as the hopping bandwidth.

[Configuration of base station apparatus]
FIG. 1 is a block diagram showing a schematic functional configuration of a base station apparatus 1 according to the present invention. The base station apparatus 1 includes a transmission unit 101, a reception unit 103, a scheduling unit 105, an upper layer 107, a channel estimation unit 108, and an antenna 109. The transmission unit 101 includes a data control unit 1011, a modulation unit 1013, and a wireless transmission unit 1015. In addition, the reception unit 103 includes a wireless reception unit 1031, a demodulation unit 1033, and a data extraction unit 1035.

  The data control unit 1011 receives user data and control data, places control data on the PDCCH, and places transmission data and control data for the mobile station apparatus 3 on the PDSCH according to an instruction from the scheduling unit 105. The modulation unit 1013 performs signal processing such as data modulation, serial / parallel conversion of an input signal, IFFT, CP insertion, and filtering to generate a transmission signal. The radio transmission unit 1015 transmits the modulated data to the mobile station apparatus 3 via the antenna 109 after up-converting the modulated data to a radio frequency. Further, the transmission unit 101 includes the control information in the PDCCH and transmits it to the mobile station apparatus 3 according to the instruction of the scheduling unit 105.

  The radio reception unit 1031 receives an uplink signal from the mobile station apparatus 3, down-converts the signal to a baseband signal, and outputs received data to the demodulation unit 1033. The data extraction unit 1035 confirms the correctness of the received data and notifies the scheduling unit 105 of the confirmation result. If the received data is correct, the data extraction unit 1035 separates the received data into user data and control data. The data extraction unit 1035 outputs the control data of the second layer such as downlink channel quality indication information and the success / failure of the downlink data (ACK / NACK) in the control data to the scheduling unit 105, and the other data Control data and user data of the third layer and the like are output to the upper layer 107. If the received data is incorrect, the data extraction unit 1035 stores the received data for combining with the retransmitted data, and performs a combining process when the retransmitted data is received.

  The scheduling unit 105 performs scheduling for arranging user data and control data on the PDSCH and PDCCH. Further, the scheduling unit 105 instructs the transmission unit 101 to transmit an A-SRS transmission instruction included in the PDCCH (DCI format) according to an instruction from the upper layer 107.

  The upper layer 107 includes a medium access control (MAC) layer, a radio link control (RLC) layer, a packet data convergence protocol (PDCP) layer, and a radio resource control (RRC: radio). Resource Control) layer processing. Since the upper layer 107 controls the processing units of the lower layer in an integrated manner, there is an interface between the upper layer 107, the scheduling unit 105, the channel estimation unit 108, the antenna 109, the transmission unit 101, and the reception unit 103. (However, not shown).

  The upper layer 107 includes a radio resource control unit 1071 (also referred to as a control unit). The radio resource control unit 1071 also manages various setting information, system information, paging control, communication state management of each mobile station device, mobility management such as handover, buffer status management for each mobile station device, It manages connection settings for cast and multicast bearers, manages mobile station identifiers (also referred to as UEID or RNTI (Radio Network Temporary Identifier)), and the like. In addition, the upper layer 107 exchanges information with another base station apparatus and information with an upper node. Further, the upper layer 107 sets and manages parameters such as SRS transmission bandwidth as SRS setting information, and notifies the scheduling unit 105 to notify the mobile station apparatus 3 of the SRS setting information included in the radio resource control signal. Instruct. The SRS setting information may be notified including not only the P-SRS parameters but also the A-SRS parameters. Also, the upper layer 107 instructs the scheduling unit 105 to transmit A-SRS when it is desired to perform uplink channel measurement as necessary. Also, the upper layer 107 determines the communication environment of the mobile station apparatus 3 based on the channel estimation value of the uplink signal obtained from the channel estimation unit 108, and performs optimal resource allocation for PUSCH. Further, the upper layer 107 can instruct the mobile station apparatus 3 to perform optimal A-SRS transmission in consideration of the communication environment of the mobile station apparatus 3.

  In addition, in the uplink scheduling, the scheduling unit 105 estimates the uplink channel state (wireless channel state) output from the channel estimation unit 108, requests for resource allocation from the mobile station device 3, Uplink transport format (transmission form, ie, physical resource block allocation and modulation scheme and code) for modulating each data based on usable PRB information, scheduling information input from higher layer 107, etc. Scheduling information used for uplink selection scheduling and uplink scheduling. The scheduling information used for the uplink scheduling is output to the data control unit 1011. Also, when the upper layer 107 is instructed to transmit A-SRS, the scheduling information is reset and output to the data control unit 1011.

  In addition, the scheduling unit 105 maps the downlink logical channel input from the higher layer 107 to the transport channel and outputs it to the data control unit 1011. In addition, the scheduling unit 105 processes the control data and the transport channel acquired in the uplink input from the data extraction unit 1035 as necessary, maps them to the uplink logical channel, and outputs them to the upper layer 107. To do.

  Channel estimation section 108 estimates an uplink channel state from the demodulation reference signal for demodulation of uplink data, and outputs the estimation result to demodulation section 1033. Further, in order to perform uplink scheduling, an uplink channel state is estimated from the sounding reference signal, and the estimation result is output to scheduling section 105.

[Configuration of mobile station device]
FIG. 2 is a block diagram showing a schematic functional configuration of the mobile station apparatus 3 of the present invention. The mobile station apparatus 3 includes a transmission unit 201, a reception unit 203, a scheduling unit 205, a reference signal generation unit 206, an upper layer 207, and an antenna 209. The transmission unit 201 includes a data control unit 2011, a modulation unit 2013, and a wireless transmission unit 2015. The reception unit 203 includes a wireless reception unit 2031, a demodulation unit 2033, and a data extraction unit 2035.

  User data and control data are input from the upper layer 207 to the data control unit 2011. The data control unit 2011 arranges the input data on the PUSCH or PUCCH according to an instruction from the scheduling unit 205. The modulation unit 2013 performs data modulation on PUSCH and PUCCH and outputs the data to the radio transmission unit 2015. The radio transmission unit 2015 inserts the modulated data and the uplink reference signal into discrete Fourier transform (DFT), subcarrier mapping, inverse fast Fourier transform (IFFT), and CP (Cyclic Prefix). Then, signal processing such as filtering is performed, a transmission signal is generated, up-converted to a radio frequency, and then transmitted to the base station apparatus 1 via the antenna 209.

  Radio receiving section 2031 receives the downlink signal from base station apparatus 1, down-converts it to a baseband signal, and outputs the received signal to demodulation section 2033. The demodulator 2033 demodulates the received data. The data extraction unit 2035 separates the received data into user data and control data. The data extraction unit 2035 outputs scheduling information, random access response messages, control data related to intermittent reception control, and other second layer control data to the scheduling unit 205 and outputs user data to the upper layer 207. In addition, the data extraction unit 2035 detects control information included in the PDCCH (DCI format) and outputs it to the upper layer 207.

  The scheduling unit 205 analyzes the control data input from the data extraction unit 2035, generates uplink scheduling information, and performs data control to allocate user data and control data to PUSCH and PUCCH based on the scheduling information. Section 2011 is instructed.

  Further, the scheduling unit 205 includes a reference signal control unit 2051. The reference signal control unit 2051 extracts SRS setting information based on the scheduling information transmitted from the base station apparatus 1. Also, transmission control is performed when SRS and PUSCH or PUCCH occur at the same timing, and SRS transmission control information is generated. The reference signal control unit 2051 outputs the SRS setting information and the SRS transmission control information to the reference signal generation unit 206. Here, the SRS setting information is information for setting parameters such as SRS transmission bandwidth and transmission cycle. The SRS transmission control information is information indicating an SRS transmission control method when the SRS and other uplink channels (PUSCH, PUCCH) are allocated to the same subframe. For example, when SRS and PUCCH occur in the same subframe, this is information for instructing the mobile station apparatus 3 to perform a process of not transmitting SRS.

  In uplink scheduling, the scheduling unit 205 determines the uplink buffer status input from the higher layer 207 and uplink scheduling information (transport format and HARQ retransmission) from the base station apparatus 1 input from the data extraction unit 207. Information), and scheduling information for mapping the uplink logical channel input from the upper layer 207 to the transport channel and the uplink scheduling based on the scheduling information input from the upper layer 208, etc. Scheduling information to be generated is generated. Note that the information notified from the base station apparatus 1 is used for the uplink transport format. The scheduling information is output to the data control unit 2011.

  In addition, the scheduling unit 205 maps the uplink logical channel input from the higher layer 207 to the transport channel and outputs it to the data control unit 2011. The scheduling unit 205 also outputs the CSI, CQI, PMI, RI, and CRC check confirmation results input from the data extraction unit 207 input from the channel estimation unit 208 to the data control unit 2011. . In addition, the scheduling unit 205 processes the control data and the transport channel acquired in the downlink input from the data extraction unit 2035 as necessary, maps them to the downlink logical channel, and outputs them to the upper layer 207. To do.

  The scheduling unit 205 includes a counter control unit. The counter control unit can assign a transmission counter and a reception counter to a certain signal of a certain component carrier, in order to measure the number of transmissions of a preamble transmission counter and a scheduling request for measuring the number of random access preamble transmissions. Scheduling request counter. Further, a reference signal transmission counter for measuring the number of times the sounding reference signal is transmitted may be included as necessary. Furthermore, these counters may be assigned for each component carrier or for each transmission antenna port. Here, the transmission antenna port is a logical antenna, and a plurality of antenna ports can be assigned to one physical antenna, and one antenna port is realized by a plurality of physical antennas. You can also.

  In order to measure the number of transmissions of A-SRS, the counter control unit selects a new counter, an existing counter, which is a preamble transmission counter or a scheduling request counter. However, these counters are not used for measuring the number of A-SRS transmissions within the transmission period of the physical random access channel or within the transmission period of the scheduling request.

  Channel estimation section 208 estimates the downlink channel state from DL-RS for downlink data demodulation, and outputs the estimation result to demodulation section 2033. Also, the channel estimation unit 208 notifies the base station apparatus 1 of the downlink channel state (radio channel state, CSI, CQI, PMI, RI) estimation result from the downlink reference signal to the downlink channel. The state is estimated, and the estimation result is output to the scheduling unit 205 as, for example, CSI, CQI, PMI, or RI.

  The reference signal generation unit 206 generates SRS (A-SRS, P-SRS) based on the SRS setting information and the SRS transmission control information input from the reference signal control unit 2051, and outputs them to the radio transmission unit 2015.

  The upper layer 207 includes a medium access control (MAC) layer, a radio link control (RLC) layer, a packet data convergence protocol (PDCP) layer, and a radio resource control (RRC: radio). Resource Control) layer processing. Since the upper layer 207 controls the processing units of the lower layer in an integrated manner, there is an interface between the upper layer 207, the scheduling unit 205, the channel estimation unit 208, the antenna 209, the transmission unit 201, and the reception unit 203. (However, not shown).

  The upper layer 207 has a radio resource control unit 2071 (also referred to as a control unit). The radio resource control unit 2071 manages various setting information, system information, paging control, communication status management of the local station, mobility management such as handover, buffer status management, unicast and multicast bearer connection setting management The mobile station identifier (UEID) is managed. In addition, the upper layer 207 extracts SRS setting information from the radio resource control signal transmitted from the base station apparatus 1 and sets SRS parameters. Further, when an A-SRS transmission instruction is included from the received DCI format, the scheduling information considering the A-SRS transmission is reset and output to the scheduling unit 205. Further, upper layer 207 sets A-SRS in accordance with an A-SRS transmission instruction from base station apparatus 1 and outputs the A-SRS to scheduling section 205 as scheduling information.

<First Embodiment>
A first embodiment of the present invention will be described below. In the first embodiment, the base station apparatus notifies the mobile station apparatus of a radio resource control signal including a frequency hopping instruction of the sounding reference signal, and sets the downlink control information format including the transmission instruction of the sounding reference signal to the mobile station apparatus. To notify. The mobile station apparatus sets the frequency hopping of the sounding reference signal according to the received radio resource control signal, and if the received downlink control information format includes a transmission instruction for the sounding reference signal, the mobile station apparatus transmits the sounding reference signal. Transmit to the base station apparatus and measure the number of transmissions of the sounding reference signal.

  In the first embodiment, by providing a transmission counter for the sounding reference signal, it is possible to calculate the frequency transmission position by the existing frequency hopping method, and at each transmission without increasing the overhead added to the DCI format. The frequency transmission position can be changed.

<Second Embodiment>
Next, a second embodiment of the present invention will be described below. In the second embodiment, the base station apparatus notifies the mobile station apparatus of a radio resource control signal including a frequency hopping instruction for the sounding reference signal, and sets the downlink control information format including the transmission instruction for the sounding reference signal to the mobile station apparatus. To notify. The mobile station apparatus sets the frequency hopping of the sounding reference signal according to the received radio resource control signal, sets the preamble transmission counter for measuring the number of times the sounding reference signal is transmitted, and sets the sounding reference signal in the received downlink control information format. Is transmitted, the sounding reference signal is transmitted to the base station apparatus, and the number of transmissions of the sounding reference signal is measured by the preamble transmission counter.

  In the second embodiment, it is necessary to generate a new counter for measuring the number of transmissions of the sounding reference signal in the mobile station apparatus by using the preamble transmission counter, which is an existing transmission counter, for measuring the number of transmissions of the sounding reference signal. Disappear.

  In the second embodiment, when the mobile station apparatus transmits a physical random access channel to the base station apparatus, the scheduling request counter is set during the period in which the mobile station apparatus transmits the physical random access channel to the base station apparatus. It is possible to continuously measure the number of times the sounding reference signal is transmitted. When the transmission period of the physical random access channel ends, the preamble transmission counter can be assigned again for measuring the number of transmissions of the sounding reference signal.

  FIG. 4 is a flowchart illustrating a method of assigning a counter for measuring the number of transmissions of the sounding reference signal of the mobile station apparatus according to the second embodiment. If the received DCI format includes a sounding reference signal transmission instruction (step S101: YES), the mobile station apparatus assigns a preamble transmission counter as a counter for measuring the number of times the sounding reference signal is transmitted (step S102). ). At that time, when a physical random access channel is transmitted (step S103: YES), a scheduling request counter is assigned as a counter for measuring the number of times the sounding reference signal is transmitted (step S104). Further, at that time, when a scheduling request is transmitted (step S105: YES), even if a sounding reference signal is transmitted to the base station apparatus, the number of transmissions is not measured (step S106). When the physical random access channel is not transmitted together with the sounding reference signal (step S103: NO), the preamble transmission counter is assigned as it is as a counter for measuring the number of transmissions of the sounding reference signal. When the scheduling request is not transmitted together with the sounding reference signal and the physical random access channel (step S105: NO), the scheduling request counter is used as a counter for measuring the number of times the sounding reference signal is transmitted until the transmission of the physical random access channel is completed. .

<Third Embodiment>
Next, a third embodiment of the present invention will be described below. In the third embodiment, the base station apparatus notifies the mobile station apparatus of a radio resource control signal including a frequency hopping instruction for the sounding reference signal, and sets the downlink control information format including the transmission instruction for the sounding reference signal to the mobile station apparatus. To notify. The mobile station apparatus sets the frequency hopping of the sounding reference signal according to the received radio resource control signal, assigns a scheduling request counter for measuring the number of transmissions of the scheduling request for measuring the number of transmissions of the sounding reference signal, and receives the received downlink When the control information format includes a sounding reference signal transmission instruction, the sounding reference signal is transmitted to the base station apparatus, and the number of times the sounding reference signal is transmitted is measured by the scheduling request counter.

  In the third embodiment, it is necessary to generate a new counter for measuring the number of transmissions of the sounding reference signal in the mobile station apparatus by using the scheduling request counter that is an existing transmission counter for measuring the number of transmissions of the sounding reference signal. Disappear.

  In the third embodiment, when the mobile station apparatus transmits a scheduling request to the base station apparatus, the sounding reference is performed using the preamble transmission counter during the period in which the mobile station apparatus transmits the scheduling request to the base station apparatus. The number of signal transmissions can be continuously measured. When the transmission period of the scheduling request ends, the scheduling request counter can be assigned again for measuring the number of transmissions of the sounding reference signal.

  FIG. 5 is a flowchart showing a method of assigning a counter for measuring the number of transmissions of the sounding reference signal of the mobile station apparatus in the third embodiment. If the received DCI format includes a sounding reference signal transmission instruction (step S201: YES), the mobile station apparatus assigns a scheduling request counter as a counter for measuring the number of times the sounding reference signal is transmitted (step S202). ). At that time, when a scheduling request is transmitted (step S203: YES), a scheduling request counter is assigned as a counter for measuring the number of times the sounding reference signal is transmitted (step S204). Furthermore, at that time, when a physical random access channel is transmitted (step S205: YES), the number of transmissions is not measured even if the sounding reference signal is transmitted to the base station apparatus (step S206). When the scheduling request is not transmitted together with the sounding reference signal (step S203: NO), the scheduling request counter is assigned as it is as a counter for measuring the number of times the sounding reference signal is transmitted. When the physical random access channel is not transmitted together with the sounding reference signal and the scheduling request (step S205: NO), the preamble transmission counter is used as a counter for measuring the number of times the sounding reference signal is transmitted until the transmission of the scheduling request is completed. To do.

  According to the present invention, the mobile station apparatus can calculate the frequency transmission position of the sounding reference signal for each transmission of the sounding reference signal while avoiding an increase in overhead to the DCI format, thereby realizing efficient communication. it can.

  In addition, you may make it implement | achieve a part of function of the base station apparatus 1 and the mobile station apparatus 3 in embodiment mentioned above with a computer. In that case, the program for realizing the control function may be recorded on a computer-readable recording medium, and the program recorded on the recording medium may be read into a computer system and executed. Here, the “computer system” includes an OS and hardware such as peripheral devices. The “computer-readable recording medium” refers to a storage device such as a flexible medium, a magneto-optical disk, a portable medium such as a ROM and a CD-ROM, and a hard disk incorporated in a computer system. Furthermore, “computer-readable recording medium” means that a program is held dynamically for a short time, like a communication line when a program is transmitted via a network such as the Internet or a communication line such as a telephone line. It is also possible to include one that holds a program for a certain time, such as a volatile memory inside a computer system that becomes a server or client in that case. The program may be a program for realizing a part of the functions described above, and may be a program capable of realizing the functions described above in combination with a program already recorded in a computer system.

  Moreover, you may implement | achieve part or all of the mobile station apparatus 3 in the embodiment mentioned above and the base station apparatus 1 as LSI (Large Scale Integration) which is typically an integrated circuit. Each functional block of the mobile station device 3 and the base station device 1 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.

DESCRIPTION OF SYMBOLS 1 Base station apparatus 3 Mobile station apparatus 101 Transmitter (base station side transmitter)
103 Receiver (base station side receiver)
105 Scheduling section 107 Upper layer 108 Channel estimation section 109 Antenna 201 Transmitting section (mobile station side transmitting section)
203 Receiving unit (receiving unit on the mobile station side)
205 Scheduling unit 206 Reference signal generation unit 207 Upper layer 208 Channel estimation unit 209 Antenna 1011 Data control unit 1013 Modulation unit 1015 Radio transmission unit 1031 Radio reception unit 1033 Demodulation unit 1035 Data extraction unit 1071 Radio resource control unit 2011 Data control unit 2013 Modulation Unit 2015 wireless transmission unit 2031 wireless reception unit 2033 demodulation unit 2035 data extraction unit 2051 reference signal control unit 2071 radio resource control unit

Claims (25)

A wireless communication system in which a base station device and a mobile station device perform wireless communication,
The base station device
Notifying the mobile station apparatus of a radio resource control signal including a frequency hopping instruction for a sounding reference signal;
Notifying the mobile station apparatus of a downlink control information format including a sounding reference signal transmission instruction,
The mobile station device
According to the radio resource control signal, setting frequency hopping of the sounding reference signal,
If the downlink control information format includes a transmission instruction for the sounding reference signal, the sounding reference signal is transmitted to the base station device,
A radio communication system, characterized in that the number of transmissions of the sounding reference signal is measured. A wireless communication system in which a base station device and a mobile station device perform wireless communication,
The base station device
Notifying the mobile station apparatus of a radio resource control signal including a frequency hopping instruction for a sounding reference signal;
Notifying the mobile station apparatus of a downlink control information format including a sounding reference signal transmission instruction,
The mobile station device
According to the radio resource control signal, setting frequency hopping of the sounding reference signal,
Assign a preamble transmission counter for measuring the number of transmissions of the physical random access channel for measuring the number of transmissions of the sounding reference signal,
If the downlink control information format includes a transmission instruction for the sounding reference signal, the sounding reference signal is transmitted to the base station device,
The wireless communication system, wherein the number of transmissions of the sounding reference signal is measured by the preamble transmission counter. A wireless communication system in which a base station device and a mobile station device perform wireless communication,
The base station device
Notifying the mobile station apparatus of a radio resource control signal including a frequency hopping instruction for a sounding reference signal;
Notifying the mobile station apparatus of a downlink control information format including a sounding reference signal transmission instruction,
The mobile station device
According to the radio resource control signal, setting frequency hopping of the sounding reference signal,
A scheduling request counter for measuring the number of transmissions of a scheduling request is allocated for measuring the number of transmissions of a sounding reference signal.
If the downlink control information format includes a transmission instruction for the sounding reference signal, the sounding reference signal is transmitted to the base station device,
The wireless communication system, wherein the number of transmissions of the sounding reference signal is measured by the scheduling request counter. A wireless communication system in which a base station device and a mobile station device perform wireless communication,
The base station device
Notifying the mobile station apparatus of a radio resource control signal including a frequency hopping instruction for a sounding reference signal;
Notifying the mobile station apparatus of a downlink control information format including a sounding reference signal transmission instruction,
The mobile station device
According to the radio resource control signal, setting frequency hopping of the sounding reference signal,
When the downlink control information format includes an instruction to transmit the sounding reference signal, and the sounding reference signal and the physical random access channel are arranged at the same timing, the sounding reference signal and the physical random access channel To the base station device,
A radio communication system, wherein the number of transmissions of the sounding reference signal is measured by a scheduling request counter. A wireless communication system in which a base station device and a mobile station device perform wireless communication,
The base station device
Notifying the mobile station apparatus of a radio resource control signal including a frequency hopping instruction for a sounding reference signal;
Notifying the mobile station apparatus of a downlink control information format including a sounding reference signal transmission instruction,
The mobile station device
According to the radio resource control signal, setting frequency hopping of the sounding reference signal,
If the downlink control information format includes a transmission instruction for the sounding reference signal and the sounding reference signal and the scheduling request are arranged at the same timing, the sounding reference signal and the scheduling request are transmitted to the base station. To the device,
A radio communication system, wherein the number of transmissions of the sounding reference signal is measured by a preamble transmission counter. The mobile station device
The transmission request of the sounding reference signal is measured by a scheduling request counter when transmitting a physical random access channel within a period in which the number of transmissions of the sounding reference signal is measured. The wireless communication system described. The mobile station device
The transmission count of the sounding reference signal is measured by a preamble transmission counter when a scheduling request is transmitted within a period in which the transmission count of the sounding reference signal is measured. Wireless communication system. The base station device
Notifying the mobile station apparatus of a downlink control information format including a sounding reference signal transmission instruction,
The mobile station device
If the downlink control information format includes a transmission instruction for the sounding reference signal, the resource allocation position of the sounding reference signal is calculated based on the number of transmissions,
Transmitting the sounding reference signal to the base station apparatus;
The radio communication system according to any one of claims 1 to 7, wherein the number of transmissions of the sounding reference signal is measured. The mobile station device
The scheduling request counter or the preamble transmission counter does not measure the number of transmissions of the sounding reference signal when the scheduling request and the physical random access channel are transmitted at the same timing. The wireless communication system according to 1. The mobile station device
The wireless communication system according to any one of claims 2 to 9, wherein when the scheduling request and the physical random access channel are transmitted at the same timing, frequency hopping of the sounding reference signal is not performed. The base station device
Every time a sounding reference signal transmission instruction is sent, the resource allocation position of the sounding reference signal by frequency hopping is calculated,
The radio communication system according to claim 1, wherein channel estimation of the resource allocation position is performed. A mobile station device that performs radio communication with a base station device,
Means for receiving a radio resource control signal and a downlink control information format notified from the base station device;
Means for setting frequency hopping of the sounding reference signal according to the radio resource control signal;
If the downlink control information format includes a sounding reference signal transmission instruction, means for transmitting the sounding reference signal to the base station device;
Means for measuring the number of times the sounding reference signal is transmitted. A mobile station device that performs radio communication with a base station device,
Means for receiving a radio resource control signal and a downlink control information format notified from the base station device;
Means for setting frequency hopping of the sounding reference signal according to the radio resource control signal;
Means for assigning a preamble transmission counter for measuring the number of transmissions of a physical random access channel for measuring the number of times of transmission of a sounding reference signal;
If the downlink control information format includes a sounding reference signal transmission instruction, means for transmitting the sounding reference signal to the base station device;
And a means for measuring the number of transmissions of the sounding reference signal by the preamble transmission counter. A mobile station device that performs radio communication with a base station device,
Means for receiving a radio resource control signal and a downlink control information format notified from the base station device;
Means for setting frequency hopping of the sounding reference signal according to the radio resource control signal;
Means for allocating a scheduling request counter for measuring the number of transmissions of a scheduling request for measuring the number of transmissions of a sounding reference signal;
If the downlink control information format includes a sounding reference signal transmission instruction, means for transmitting the sounding reference signal to the base station device;
Means for measuring the number of transmissions of the sounding reference signal with the scheduling request counter. A mobile station device that performs radio communication with a base station device,
Means for receiving a radio resource control signal and a downlink control information format notified from the base station device;
Means for setting frequency hopping of the sounding reference signal according to the radio resource control signal;
When the downlink control information format includes an instruction to transmit the sounding reference signal, and the sounding reference signal and the physical random access channel are arranged at the same timing, the sounding reference signal and the physical random access channel Means for transmitting to the base station device;
And a means for measuring the number of transmissions of the sounding reference signal with a scheduling request counter. A mobile station device that performs radio communication with a base station device,
Means for receiving a radio resource control signal and a downlink control information format notified from the base station device;
Means for setting frequency hopping of the sounding reference signal according to the radio resource control signal;
If the downlink control information format includes a transmission instruction for the sounding reference signal and the sounding reference signal and the scheduling request are arranged at the same timing, the sounding reference signal and the scheduling request are transmitted to the base station. Means for transmitting to the device;
And a means for measuring the number of transmissions of the sounding reference signal with a preamble transmission counter. The mobile station device
In the case where a physical random access channel is transmitted within a period in which the number of transmissions of the sounding reference signal is measured, at least means for measuring the number of transmissions of the sounding reference signal with a scheduling request counter is provided. The mobile station apparatus according to claim 13. The mobile station device
The apparatus further comprises: a means for measuring the number of transmissions of the sounding reference signal with a preamble transmission counter when transmitting a scheduling request within a period in which the number of transmissions of the sounding reference signal is being measured. 14. The mobile station device according to 14. A wireless communication method in which a base station device and a mobile station device perform wireless communication,
The base station device
Notifying the mobile station apparatus of a radio resource control signal including a frequency hopping instruction of a sounding reference signal;
Notifying the mobile station apparatus of a downlink control information format including a sounding reference signal transmission instruction;
The mobile station device
Setting frequency hopping of the sounding reference signal according to the radio resource control signal;
When the downlink control information format includes an instruction to transmit the sounding reference signal, the step of transmitting the sounding reference signal to the base station device;
Measuring at least the number of transmissions of the sounding reference signal. A wireless communication method, comprising: A wireless communication method in which a base station device and a mobile station device perform wireless communication,
The base station device
Notifying the mobile station apparatus of a radio resource control signal including a frequency hopping instruction of a sounding reference signal;
Notifying the mobile station apparatus of a downlink control information format including a sounding reference signal transmission instruction;
The mobile station device
Setting frequency hopping of the sounding reference signal according to the radio resource control signal;
Assigning a preamble transmission counter for measuring the number of transmissions of the physical random access channel for measuring the number of transmissions of the sounding reference signal;
When the downlink control information format includes an instruction to transmit the sounding reference signal, the step of transmitting the sounding reference signal to the base station device;
And a step of measuring the number of transmissions of the sounding reference signal by the preamble transmission counter. A wireless communication method in which a base station device and a mobile station device perform wireless communication,
The base station device
Notifying the mobile station apparatus of a radio resource control signal including a frequency hopping instruction of a sounding reference signal;
Notifying the mobile station apparatus of a downlink control information format including a sounding reference signal transmission instruction;
The mobile station device
Setting frequency hopping of the sounding reference signal according to the radio resource control signal;
Assigning a scheduling request counter for measuring the number of transmissions of a scheduling request for measuring the number of transmissions of a sounding reference signal;
When the downlink control information format includes an instruction to transmit the sounding reference signal, the step of transmitting the sounding reference signal to the base station device;
And a step of measuring the number of transmissions of the sounding reference signal by the scheduling request counter. A wireless communication method in which a base station device and a mobile station device perform wireless communication,
The base station device
Notifying the mobile station apparatus of a radio resource control signal including a frequency hopping instruction of a sounding reference signal;
Notifying the mobile station apparatus of a downlink control information format including a sounding reference signal transmission instruction;
The mobile station device
Setting frequency hopping of the sounding reference signal according to the radio resource control signal;
When the downlink control information format includes an instruction to transmit the sounding reference signal, and the sounding reference signal and the physical random access channel are arranged at the same timing, the sounding reference signal and the physical random access channel Transmitting to the base station device;
And a step of measuring the number of transmissions of the sounding reference signal by a scheduling request counter. A wireless communication method in which a base station device and a mobile station device perform wireless communication,
The base station device
Notifying the mobile station apparatus of a radio resource control signal including a frequency hopping instruction of a sounding reference signal;
Notifying the mobile station apparatus of a downlink control information format including a sounding reference signal transmission instruction;
The mobile station device
Setting frequency hopping of the sounding reference signal according to the radio resource control signal;
If the downlink control information format includes a transmission instruction for the sounding reference signal and the sounding reference signal and the scheduling request are arranged at the same timing, the sounding reference signal and the scheduling request are transmitted to the base station. Transmitting to the device;
And at least a step of measuring the number of transmissions of the sounding reference signal by a preamble transmission counter. The mobile station device
In the case of transmitting a physical random access channel within a period in which the number of transmissions of the sounding reference signal is measured, the method includes at least a step of measuring the number of transmissions of the sounding reference signal with a scheduling request counter. The wireless communication method according to claim 20. The mobile station device
The method further comprises a step of measuring the number of transmissions of the sounding reference signal with a preamble transmission counter when transmitting a scheduling request within a period in which the number of transmissions of the sounding reference signal is being measured. 22. A wireless communication method according to item 21.