JP2010178129A - Base station apparatus, mobile station apparatus, wireless communication system and reference signal transmission method of the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce the amount of signaling even when using a plurality of bandwidth parts for SRS transmitted by the mobile station apparatus of a system such as Advanced EUTRA. <P>SOLUTION: A base station apparatus 100 is equipped with: a bandwidth configuration table storage part 160 for holding bandwidth configuration parameter information corresponding to the combination of bandwidth section information indicating the section of the size of the bandwidth of the bandwidth part, a bandwidth level and a bandwidth index; a transmission information control part 120 for allocating a band for reference signals on the basis of common resource allocation information for the plurality of bandwidth parts and the bandwidth configuration parameter information stored in the bandwidth configuration table storage part; a transmission part for transmitting the resource allocation information to the mobile station apparatus; and a reception part for receiving the reference signals for uplink reception quality measurement from the mobile station apparatus in the band for the reference signals allocated by the transmission information control part. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to wireless communication. The present invention particularly relates to a base station device, a mobile station device, a wireless communication system, and a reference signal transmission method in them.

  Evolved Universal Terrestrial Radio Access (hereinafter referred to as EUTRA), which is an advanced version of Advanced Universal Radio Access (hereinafter referred to as EUTRA), which evolved the 3rd generation mobile communication system in the 3GPP (3rd Generation Partnership Project). Investigation is in progress (Non-Patent Document 1).

  In addition, in EUTRA, a single-carrier frequency division access (SC-FDMA) method, which is a single carrier communication method, is proposed as an information communication method in the uplink. In Advanced EUTRA, information in the uplink is used. As a communication method, in addition to the SC-FDMA communication method, the OFDMA (Orthogonal Frequency Division Multiple Access) communication method that is a multicarrier communication method or the DFT-S-OFDMA (Discrete Fourier Transform-Spread-MandrateFrequencyAmplifier method). There has been proposed.

Also, in EUTRA, as for the transmission method of uplink reception quality measurement reference signals (SRS, Sounding Reference Signal) from the mobile station device to the base station device, as a communication method for uplink information, a single method using the DFT-S-OFDMA method is used. A carrier communication system has been proposed.

  However, in Advanced EUTRA, it is expected that a wider frequency bandwidth than that proposed in EUTRA is allocated to mobile station apparatuses and base station apparatuses.

Advanced EUTRA has proposed carrier aggregation (sometimes called Spectrum Aggregation) as a technology that enables higher-speed data transmission while maintaining compatibility with EUTRA. (For example, nonpatent literature 2). Carrier aggregation is a downlink communication in which a transmission device and a reception device having a reception bandwidth exceeding the transmission bandwidth of the transmission device are prepared, and a plurality of transmission devices each having a different frequency band are set. This is a technique for improving data rate by transmitting data and receiving data transmitted from the plurality of transmitting apparatuses at the receiving apparatus. Also, in uplink communication, a reception device and a transmission device having a transmission bandwidth that exceeds the reception bandwidth of the reception device are prepared, and a plurality of reception devices each having a different frequency band are set from the transmission device. This is a technique for improving the data rate by receiving transmitted data.
In the present invention, one frequency band among a plurality of frequency bands used for carrier aggregation is referred to as a bandwidth portion.

  However, when applying carrier aggregation in uplink communication, since the maximum transmission bandwidth is different from that of the conventional EUTRA scheme, it is necessary to consider an uplink channel transmission method suitable for Advanced EUTRA. In particular, a sounding reference signal (Sounding RS, hereinafter referred to as SRS (Section 5.5.3 of Non-Patent Document 3)), which is a reference signal for uplink reception quality measurement of EUTRA, indicates the uplink quality of the mobile station apparatus. Since the measurement is used not only for uplink scheduling but also for uplink timing adjustment, an appropriate transmission method is required as the uplink maximum transmission bandwidth is expanded.

  In addition, due to restrictions on the transmission power on the mobile station device side, etc., even if the bandwidth is narrower than the uplink maximum transmission bandwidth in one transmission of SRS, instead of transmitting SRS in a wide band at one time, There has also been proposed a method (frequency hopping method) in which the reception quality of the entire uplink maximum transmission bandwidth can be measured within a predetermined time by hopping the frequency position each time an SRS is transmitted (Non-patent Document 3 (5. Section 5.3)).

3GPP TR36.913, Requirements for Further Advancements for E-UTRA. V8.0.0 http: // www. 3 gpp. org / ftp / Specs / html-info / 36913. htm Ericsson, R1-082468, 3GPP TSG-RAN1 Meeting # 53bis, Warsaw, Poland, June 30-Jury 4, 2008 3GPP TS 36.211, Physical Channels and Modulation. V8.4.0 http: // www. 3 gpp. org / ftp / Specs / html-info / 36211. htm

  However, until now, there is no disclosure in Non-Patent Documents 1 to 3 regarding the timing, transmission method, and related parameters at which an advanced EUTRA mobile station apparatus (hereinafter simply referred to as a mobile station apparatus) transmits SRS. .

In addition, it is necessary to adjust the allocation of the timing at which the mobile station apparatus transmits the SRS, the allocation of the frequency band, and related parameters, etc., between the base station apparatus and the mobile station apparatus. In order to reduce it, it is desirable to reduce the amount of signaling information during this adjustment as much as possible.
In particular, in order to transmit SRS using a plurality of bandwidth parts, if SRS configuration is set for each bandwidth part and SRS setting information is transmitted to the mobile station apparatus, As the number of bandwidth portions increases, the amount of signaling also increases with the number of bandwidth portions, which is not desirable.

  In addition, when applying carrier aggregation, the conventional EUTRA system requires an appropriate transmission method because frequency hopping is performed between a plurality of frequency bands divided by the SRS or a plurality of discontinuous frequency bands.

  In addition, if SRS with a unique scheme / design is introduced in Advanced EUTRA, not only cannot it coexist with a mobile station device of EUTRA, but dedicated resources (frequency and code resources) for the unique scheme are required separately. Therefore, the complexity of the mobile station device and the base station device increases, which is not desirable.

  Non-patent documents 1 to 3 describe what processing the base station apparatus and the mobile station apparatus perform when a bandwidth part having a bandwidth for which no SRS configuration is set is allocated. It has not been.

That is, the present invention has been made in view of these situations.
The main problem of the present invention is to reduce the amount of signaling even when a plurality of bandwidth portions are used for SRS transmitted by a new type mobile station apparatus such as Advanced EUTRA.
Another object of the present invention is to provide an appropriate frequency hopping method even when carrier aggregation is applied.
In addition, one of the problems that the present invention follows is to provide a means for compensating for mutual compatibility between a new system such as Advanced EUTRA and an existing system such as EUTRA, and devices of these systems can coexist. is there.
In addition, one of the problems that the present invention follows is that between a base station apparatus and a mobile station apparatus even when a bandwidth portion having a wide bandwidth such that an SRS configuration is not set is allocated. It is to provide a means for appropriately exchanging SRS.
Thus, all resources (frequency bands) that can be allocated to the mobile station apparatus can be used efficiently, and the frequency efficiency of communication control (scheduling) by the base station apparatus can be improved. Objective. Then, a base station device, a mobile station device, a wireless communication system, and a reference signal transmission method thereof that enable them are provided.

  A base station apparatus according to an aspect of the present invention sets an SRS configuration for a plurality of bandwidth portions, and in response to the SRS configuration, assigns resource allocation information common to the plurality of bandwidth portions to a mobile station device It is characterized by transmitting to.

  A mobile station apparatus according to an aspect of the present invention is characterized in that an SRS is generated based on resource allocation information transmitted from the base station apparatus, and the SRS is transmitted to the base station apparatus.

  Moreover, the base station apparatus by 1 aspect of this invention is a base station apparatus which receives SRS from a mobile station apparatus, Comprising: When a carrier aggregation is applied, the mobile station apparatus which transmits each SRS from a some frequency band On the other hand, it is characterized by transmitting resource allocation information. This resource allocation information functions as frequency band instruction information for instructing a plurality of frequency bands when the mobile station apparatus transmits SRS.

  A base station apparatus according to an aspect of the present invention is characterized in that the resource allocation information is included in a radio resource control signal and transmitted to the mobile station apparatus.

  Also, the base station apparatus according to one aspect of the present invention, when a wide frequency band outside the allowable range of the mobile station apparatus is included in the plurality of frequency bands, the wide frequency band is within the allowable range of the mobile station apparatus. The frequency band is divided so that

  The mobile station apparatus according to the present invention is a mobile station apparatus that transmits to the base station apparatus an SRS indicating the signal quality received from the base station apparatus, from a frequency band calculated from information unique to the mobile station apparatus. The obtained SRS is transmitted to the base station apparatus.

  The mobile station apparatus of the present invention is a mobile station apparatus that transmits to the base station apparatus an SRS indicating the signal quality received from the base station apparatus, and when the carrier aggregation is applied, the base station apparatus On the other hand, SRS is transmitted using a plurality of frequency bands.

(1) Further, according to one aspect of the present invention, a base station apparatus that transmits and receives signals to and from a mobile station apparatus using a plurality of bandwidth portions, and receives uplink reception in the bandwidth portions. Bandwidth configuration parameter information, which is a parameter for setting a reference signal band for a quality measurement reference signal, bandwidth classification information indicating a bandwidth size classification of the bandwidth portion, and bandwidth A bandwidth configuration table storage unit that is stored in association with a combination of a level and a bandwidth index, and a plurality of the bandwidth portions that are stored in common resource allocation information and the bandwidth configuration table storage unit A transmission information control unit for allocating the reference signal band based on bandwidth configuration parameter information; and the resource allocation. A transmission section for abutting transmitting information to the mobile station apparatus,
A reception unit configured to receive an uplink reception quality measurement reference signal from the mobile station apparatus in the reference signal band allocated by the transmission information control unit.

  (2) Moreover, according to one aspect of the present invention, in the base station apparatus, the transmission information control unit has a bandwidth that does not exceed a predetermined maximum uplink transmission frequency bandwidth from a plurality of bandwidth portions. Is selected as a reference bandwidth portion, and a bandwidth ratio that is a ratio between the entire bandwidth of the reference bandwidth portion and the bandwidth of the reference signal bandwidth in the reference bandwidth portion is calculated. Allocating a reference signal band in the bandwidth portion according to the bandwidth of the plurality of bandwidth portions based on the calculated bandwidth ratio, and the transmission unit uses the bandwidth as the resource allocation information The bandwidth ratio and the information on the bandwidth level and the bandwidth index related to the allocation of the reference signal bandwidth in the reference bandwidth portion are transmitted.

  (3) Further, according to one aspect of the present invention, in the base station apparatus, the transmission information control unit uses a bandwidth portion having a minimum bandwidth among the plurality of bandwidth portions as the reference bandwidth portion. It is characterized by selecting.

  (4) According to another aspect of the present invention, in the base station apparatus, the transmission information control unit includes a bandwidth portion having a bandwidth that exceeds the maximum uplink transmission frequency bandwidth from the plurality of bandwidth portions. And selecting a portion of the bandwidth not exceeding the maximum uplink transmission frequency bandwidth included in the selected bandwidth portion as a virtual bandwidth portion, and selecting the selected virtual bandwidth portion as the virtual bandwidth portion. It selects as a reference | standard bandwidth part, It is characterized by the above-mentioned.

  (5) In addition, according to an aspect of the present invention, in the base station apparatus, the transmission information control unit selects a bandwidth portion having a minimum bandwidth from the plurality of bandwidth portions as a reference bandwidth portion. And assigning the reference signal band for the reference bandwidth part, and determining the bandwidth level and the bandwidth index related to the reference signal band assignment in the reference bandwidth part among the plurality of bandwidth parts. By applying to other bandwidth portions as well, the reference signal band is assigned for the other bandwidth portions, and the transmission unit uses the reference signal portion for the reference bandwidth portion as the resource assignment information. The bandwidth level and the bandwidth index related to bandwidth allocation are transmitted.

  (6) Further, according to one aspect of the present invention, in the base station apparatus, the transmission information control unit includes a plurality of bandwidth portions having a bandwidth that does not exceed a predetermined maximum uplink transmission frequency bandwidth. By selecting and applying the common bandwidth configuration parameter information held in the bandwidth configuration table storage unit to the plurality of bandwidth portions, the reference for the plurality of bandwidth portions is performed. A signal band is allocated, and the transmission unit transmits, as the resource allocation information, the bandwidth configuration parameter information used for the allocation of the reference signal band for the plurality of bandwidth portions. Features.

(7) In addition, according to an aspect of the present invention, in the base station apparatus, the transmission information control unit selects a bandwidth portion having a minimum bandwidth among the plurality of bandwidth portions as a reference bandwidth portion. And assigning the reference signal band for the reference bandwidth portion, the bandwidth configuration parameter information used for assigning the reference signal band for the reference bandwidth portion to the plurality of bandwidth portions Of the reference signal band for the other bandwidth part by applying to the other bandwidth part, the transmission unit as the resource allocation information,
(A) the bandwidth configuration parameter information used for allocating the reference signal band for the reference bandwidth portion;
(B) a bandwidth index and a bandwidth level used for allocating the reference signal band for the reference bandwidth portion, and bandwidth classification information corresponding to the reference bandwidth portion;
(A) or (b) is transmitted, and frequency position shift information for shifting the frequency range for frequency hopping is also transmitted.

  (8) Further, according to one aspect of the present invention, in the base station apparatus, the transmission information control unit has a maximum uplink transmission frequency bandwidth in which all bandwidths of the plurality of bandwidth portions are predetermined. In the case of exceeding, at least one of the plurality of bandwidth portions is divided into a plurality of bandwidth portions having a bandwidth not exceeding the maximum uplink transmission frequency bandwidth.

  (9) Further, according to one aspect of the present invention, in the base station apparatus, the transmission information control unit transmits a bandwidth portion having a bandwidth exceeding the maximum uplink transmission frequency bandwidth to the maximum uplink transmission. The frequency bandwidth is divided into predetermined virtual bandwidths that do not exceed the frequency bandwidth.

  (10) Further, according to one aspect of the present invention, in the base station apparatus, the transmission information control unit may determine a bandwidth portion having a bandwidth exceeding the maximum uplink transmission frequency bandwidth as two or more predetermined bandwidths. A plurality of bandwidth portions having a bandwidth that does not exceed the maximum uplink transmission frequency bandwidth are obtained by sequentially and evenly dividing with an integer.

(11) Further, according to one aspect of the present invention, in the base station apparatus, the transmission information control unit sets frequency hopping information of an uplink reception quality measurement reference signal for the plurality of bandwidth portions. The transmitting unit further transmits the frequency hopping information set by the transmission information control unit, and the receiving unit receives the reference signal band from the mobile station apparatus in the reference signal band according to the frequency hopping information. An uplink reception quality measurement reference signal is received.
Here, the frequency hopping information is a frequency hopping method in which the reference signal band is sequentially changed at a predetermined timing (temporal period and time offset for performing hopping, frequency change amount at the time of hopping, hopping pattern, etc. ) Setting information. This frequency hopping information includes information indicating which frequency hopping option to be described later is selected. By transmitting this frequency hopping information from the base station apparatus to the mobile station apparatus, the frequency hopping timing and the changed reference signal band can be set in common between both apparatuses.

  (12) One aspect of the present invention is a mobile station apparatus that transmits and receives signals to and from a base station apparatus using a plurality of bandwidth portions, and uplink reception quality is included in the bandwidth portions. Bandwidth configuration parameter information, which is a parameter for setting a reference signal band for a measurement reference signal, bandwidth classification information indicating a bandwidth size classification of the bandwidth portion, and a bandwidth level A bandwidth configuration table storage unit associated with a combination of bandwidth indexes, a reception unit that receives resource allocation information common to the plurality of bandwidth portions from the base station apparatus, and the reception unit Based on the bandwidth configuration parameter information read from the bandwidth configuration table storage unit according to the resource allocation information received by the The reference signal band is allocated to each of a plurality of bandwidth portions, and a reference signal control unit that generates a reference signal for uplink reception quality measurement, and the reference signal allocated by the reference signal control unit And a transmission unit that transmits the uplink reception quality measurement reference signal to the base station apparatus using a dedicated band.

  (13) Further, according to one aspect of the present invention, in the mobile station apparatus, the reception unit receives information on a bandwidth ratio, a bandwidth level, and a bandwidth index as the resource allocation information. The reference signal control unit selects a bandwidth portion having a bandwidth that does not exceed a predetermined maximum uplink transmission frequency bandwidth as a reference bandwidth portion from a plurality of bandwidth portions, and corresponds to the reference bandwidth portion The reference bandwidth for the reference bandwidth portion by the bandwidth configuration parameter information read from the bandwidth configuration table storage unit using the bandwidth classification information, the received bandwidth level and the bandwidth index. Bandwidth allocation, and the bandwidth ratio other than the reference bandwidth portion and the received bandwidth ratio Flip and the allocation of the reference signal band of the band width portion other than the reference bandwidth portion, characterized in that.

  (14) Further, according to one aspect of the present invention, in the mobile station apparatus, the reference signal control unit may use, as the reference bandwidth portion, a bandwidth portion having a minimum bandwidth among the plurality of bandwidth portions. It is characterized by selecting.

  (15) Further, according to one aspect of the present invention, in the mobile station apparatus, the reference signal control unit has a bandwidth portion having a bandwidth that exceeds the maximum uplink transmission frequency bandwidth from the plurality of bandwidth portions. And selecting a portion of the bandwidth not exceeding the maximum uplink transmission frequency bandwidth included in the selected bandwidth portion as a virtual bandwidth portion, and selecting the selected virtual bandwidth portion as the virtual bandwidth portion. It selects as a reference | standard bandwidth part, It is characterized by the above-mentioned.

  (16) Further, according to one aspect of the present invention, in the mobile station apparatus, the reception unit receives a bandwidth level and a bandwidth index as the resource allocation information, and the reference signal control unit The bandwidth portion having the smallest bandwidth is selected as a reference bandwidth portion, and the bandwidth classification information corresponding to the reference bandwidth portion, the received bandwidth level and the bandwidth index are selected. And assigning a reference signal band for the reference bandwidth portion according to the bandwidth configuration parameter information read out from the bandwidth configuration table storage unit, and corresponding to each of the other bandwidth portions. The bandwidth configuration using the bandwidth classification information, the received bandwidth level and the bandwidth index. It performs assignment of the reference signal band for that bandwidth portions by the bandwidth configuration parameter information read from the gray Deployment table storage unit, and wherein the.

  (17) In addition, according to an aspect of the present invention, in the mobile station apparatus, the reception unit receives bandwidth configuration parameter information as the resource allocation information, and the reference signal control unit is predetermined. Selecting a plurality of bandwidth portions having a bandwidth that does not exceed the maximum uplink transmission frequency bandwidth, and applying the received bandwidth configuration parameter information as it is to each of the plurality of bandwidth portions. Thus, the reference signal band is assigned to each bandwidth portion.

(18) In addition, according to one aspect of the present invention, in the mobile station apparatus, the reception unit includes the resource allocation information as:
(A) Bandwidth configuration parameter information,
(B) a combination of bandwidth index, bandwidth level, and bandwidth partition information;
(A) or (b), the receiver further receives frequency position shift information for shifting a frequency range for frequency hopping, and the reference signal controller is When (a) is received, the received bandwidth configuration parameter information is applied to each of a plurality of bandwidth portions to allocate a reference signal band for each bandwidth portion, and When the unit receives (b), the bandwidth configuration read from the bandwidth configuration table storage unit using the received bandwidth index, the bandwidth level, and the bandwidth classification information A reference signal band is assigned to each of the plurality of bandwidth portions according to parameter information.

  (19) Further, according to one aspect of the present invention, in the mobile station apparatus, the reception unit receives frequency hopping information of an uplink reception quality measurement reference signal from the base station apparatus side, and the reference signal control unit Sets the frequency hopping information for the plurality of bandwidth portions, and the transmission unit transmits the reference signal for uplink reception quality measurement using the reference signal band corresponding to the frequency hopping information. It is characterized by.

  (20) Moreover, one aspect of the present invention is a reference signal transmission method in a wireless communication system in which a signal is transmitted and received using a plurality of bandwidth portions between a base station apparatus and a mobile station apparatus, the base station apparatus This is a parameter for setting a reference signal band for an uplink reception quality measurement reference signal in the bandwidth portion as bandwidth configuration parameter information common to both the station apparatus and the mobile station apparatus. Bandwidth configuration parameter information is associated with a combination of bandwidth classification information indicating a bandwidth size classification of the bandwidth portion, a bandwidth level, and a bandwidth index, and the base station apparatus and the A plurality of bandwidth units are stored in advance in the bandwidth configuration table storage unit of each mobile station device. A transmission information control process for allocating the reference signal band based on common resource allocation information and bandwidth configuration parameter information stored in the bandwidth configuration table storage unit, and in the base station apparatus An allocation information transmission process for transmitting the resource allocation information to the mobile station apparatus, and an allocation information reception for receiving resource allocation information common to the plurality of bandwidth portions from the base station apparatus in the mobile station apparatus And a plurality of bandwidth portions based on bandwidth configuration parameter information read from the bandwidth configuration table storage unit according to the resource allocation information received in the allocation information reception step in the mobile station device For each of the above reference signals A reference signal control process for allocating a reference band and generating a reference signal for measuring uplink reception quality, and in the mobile station apparatus, using the reference signal band allocated in the reference signal control process, the uplink signal quality measurement reference signal A reference signal transmission process of transmitting a link reception quality measurement reference signal to the base station apparatus; and an uplink from the mobile station apparatus in the reference signal band allocated in the transmission information control process in the base station apparatus. A reference signal receiving process for receiving a link reception quality measurement reference signal.

  (21) One embodiment of the present invention includes a base station apparatus and a mobile station apparatus, and transmits and receives signals using a plurality of bandwidth portions between the base station apparatus and the mobile station apparatus. The base station apparatus is a bandwidth configuration parameter that is a parameter for setting a reference signal band for an uplink reception quality measurement reference signal in the bandwidth portion. A bandwidth configuration table storage unit for storing information in association with a combination of bandwidth classification information indicating a bandwidth size classification of the bandwidth portion, a bandwidth level, and a bandwidth index; Resource allocation information common to the bandwidth portion and bandwidth configuration parameter information stored in the bandwidth configuration table storage unit The transmission information control unit for allocating the reference signal band based on the information, the allocation information transmission unit for transmitting the resource allocation information to the mobile station device, and the reference allocated by the transmission information control unit A reference signal receiving unit for receiving an uplink reception quality measurement reference signal from the mobile station apparatus in a signal band, wherein the mobile station apparatus is for uplink reception quality measurement in the bandwidth portion. Bandwidth configuration parameter information, which is a parameter for setting a reference signal band for a reference signal, bandwidth classification information indicating a bandwidth size classification of the bandwidth portion, a bandwidth level, A bandwidth configuration table storage unit that is stored in association with a combination with a bandwidth index, and is common to the plurality of bandwidth portions. An allocation information receiving unit that receives source allocation information from the base station apparatus, and bandwidth configuration parameter information that is read from the bandwidth configuration table storage unit according to the resource allocation information received by the allocation information receiving unit. And a reference signal control unit that allocates the reference signal band for each of a plurality of bandwidth portions and generates a reference signal for uplink reception quality measurement, and the reference allocated by the reference signal control unit A reference signal transmission unit configured to transmit the uplink reception quality measurement reference signal to the base station apparatus using a signal band.

  (22) Further, according to one aspect of the present invention, in the wireless communication system, the transmission information control unit applies the common bandwidth configuration parameter information to each of the plurality of bandwidth portions. The allocation information transmitting unit performs bandwidth allocation corresponding to the bandwidth configuration parameter information used by the transmission information control unit to allocate the reference signal bandwidth as the resource allocation information. Information, a bandwidth index, and a bandwidth level, and the allocation information receiving unit transmits, as the resource allocation information, the bandwidth classification information, the bandwidth index, and the bandwidth level transmitted by the allocation information transmitting unit. And the reference signal control unit receives the allocation information receiving unit. The bandwidth configuration parameter information is read from the bandwidth configuration table storage unit using the bandwidth category information, the bandwidth index, and the bandwidth level, and the bandwidth category information corresponding to each bandwidth portion is read. A bandwidth index and a bandwidth level for the bandwidth part corresponding to the bandwidth configuration parameter information are identified by searching the bandwidth configuration table storage unit in association with each other, and the bandwidth identified thereby The reference signal band is allocated to the bandwidth portion using a width index and the bandwidth level.

  (23) Further, according to one aspect of the present invention, in the wireless communication system, the transmission information control unit has a bandwidth that does not exceed a predetermined maximum uplink transmission frequency bandwidth from a plurality of bandwidth portions. Selecting a bandwidth portion as a reference bandwidth portion, and calculating a bandwidth ratio that is a ratio of the entire bandwidth of the reference bandwidth portion and the bandwidth of the reference signal bandwidth in the reference bandwidth portion; Based on the calculated bandwidth ratio, performs allocation of a reference signal band in the bandwidth portion according to the bandwidth of the plurality of bandwidth portions, the allocation information transmission unit, as the resource allocation information, Transmitting the bandwidth ratio and the information on the bandwidth level and the bandwidth index related to the allocation of the reference signal band in the reference bandwidth portion; and The information receiving unit receives the bandwidth classification information, the bandwidth index, the bandwidth level, and the bandwidth ratio transmitted by the allocation information transmitting unit as the resource allocation information, and the reference signal control unit includes: The bandwidth configuration table storage unit calculates the bandwidth of the reference signal using the bandwidth classification information, the bandwidth index, the bandwidth level, and the bandwidth ratio received by the allocation information receiving unit. The bandwidth of the reference signal calculated by reading the bandwidth information of the reference signal calculated from the above and searching the bandwidth configuration table storage unit in association with the bandwidth classification information corresponding to each bandwidth portion. Specify the bandwidth index, bandwidth level, and frequency hopping calculation parameters for the bandwidth part corresponding to the bandwidth information. Performing assignment of the reference signal band for the band width portion using said bandwidth index and said bandwidth level identified by, characterized in that.

  (24) One embodiment of the present invention is a wireless communication system that includes a first communication device and a second communication device, and performs wireless communication between the first communication device and the second communication device. The first communication device includes a first transmitter that transmits a signal to the second communication device, a first receiver that receives a signal from the second communication device, a sounding reference signal bandwidth index, and a sounding. A bandwidth configuration table storage unit that stores a sounding reference signal bandwidth configuration table related to a reference signal bandwidth level, and a bandwidth configuration table storage unit that is stored on the basis of a signal received by the first receiver unit. Specific sounding reference signal bandwidth index and sounding from the sounding reference signal bandwidth configuration table A transmission information control unit that selects a reference signal bandwidth level and transfers the specific sounding reference signal bandwidth index and the sounding reference signal bandwidth level to the first transmission unit for transmission to the second communication device; The second communication device includes: a second receiver that receives a signal from the first communication device; a second transmitter that transmits a signal to the first communication device; and the second receiver Based on the specific sounding reference signal bandwidth index and the sounding reference signal bandwidth level received from the first communication device, a sounding reference signal to be arranged in a plurality of bandwidth portions is generated, and the sounding reference signal is And a reference signal control unit that transfers to the second transmission unit to transmit to one communication device.

  According to the present invention, resource allocation information common to a plurality of bandwidth portions is transmitted from the base station apparatus to the mobile station apparatus, and both the base station apparatus and the mobile station apparatus are based on the common resource allocation information. A reference signal band is assigned to each bandwidth portion in a determinable manner. Therefore, there is no need to transmit information related to reference signal band allocation for each bandwidth part from the base station apparatus to the mobile station apparatus.

  The present invention provides a (parameter) setting method related to SRS between a mobile station apparatus and a base station apparatus capable of transmitting SRS across a plurality of frequency bands including discontinuous frequency bands by the above configuration. Can be provided.

In addition, the present invention can perform SRS resource allocation settings for a plurality of bandwidth portions based on one SRS configuration information regardless of the frequency bandwidth and the number of frequency bands. The amount of signaling transmitted from the mobile station device to the mobile station apparatus can be reduced.
Conventionally, in order to set SRS configuration information for each bandwidth portion, SRS bandwidth index information, SRS bandwidth level information, and the like had to be set, but in the present invention, a plurality of bandwidth portions are selected. If one bandwidth part is selected and SRS configuration information is applied to the selected bandwidth part, the SRS configuration information of the selected bandwidth part is used as SRS configuration information common to other bandwidth parts. it can.

  ADVANTAGE OF THE INVENTION According to this invention, the base station apparatus, mobile station apparatus, radio | wireless communications system, and program which can set SRS of Advanced EUTRA can be provided based on the SRS configuration of EUTRA.

Moreover, according to this invention, the base station apparatus, mobile station apparatus, radio | wireless communications system, and program which use SRS suitable for Advanced EUTRA can be provided.

Further, according to the present invention, compatibility with a base station device, a mobile station device, a wireless communication system, and a program using SRS suitable for EUTRA can be achieved.

  Moreover, according to this invention, the mobile station apparatus which can transmit SRS to a base station apparatus using a discontinuous several frequency band and the divided | segmented frequency band can be provided.

  Furthermore, according to the present invention, it is possible to provide a base station apparatus that can receive an SRS transmitted from a mobile station apparatus using a plurality of discontinuous frequency bands and divided frequency bands.

It is the schematic which shows the example of SRS resource allocation and frequency hopping used by embodiment of this invention. It is a block diagram which shows schematic structure of the base station apparatus which concerns on the 1st Embodiment of this invention. It is a block diagram which shows schematic structure of the mobile station apparatus which concerns on the 1st Embodiment of this invention. It is the schematic which showed an example of the structure of PUSCH, PUCCH, and SRS in embodiment of this invention. FIG. 3 is a schematic diagram illustrating a plurality of frequency band portions having discontinuous frequencies used according to an embodiment of the present invention. It is the schematic which shows the carrier aggregation using the several frequency band part which has said discontinuous frequency. In the embodiment of the present invention, it is the schematic which shows the structure of the table which a base station apparatus and a mobile station apparatus hold | maintain in order to manage the setting of a bandwidth part, respectively. It is a sequence diagram which shows the detailed procedure of allocation (mapping) and SRS transmission of SRS resource in 1st Embodiment. It is the schematic which showed the frequency hopping option 1 of SRS which concerns on embodiment of this invention. It is the schematic which showed the frequency hopping option 2 of SRS which concerns on embodiment of this invention. It is the schematic which showed the frequency hopping option 3 of SRS which concerns on embodiment of this invention. It is a sequence diagram which shows the detailed procedure of allocation (mapping) and SRS transmission of SRS resource in 2nd Embodiment. It is the sequence diagram which showed the detailed procedure of the process in the basic form of 3rd Embodiment. It is the sequence diagram which showed the detailed procedure of the process in the modification 1 of 3rd Embodiment. It is the sequence diagram which showed the detailed procedure of the process in the modification 2 of 3rd Embodiment. It is the schematic which shows the specific example of the frequency position shift in the modification 2 of 3rd Embodiment. It is the sequence diagram which showed the detailed procedure of the process in the modification 3 of 3rd Embodiment. It is the flowchart which showed the procedure of the mapping of SRS in 4th Embodiment. It is the schematic which shows the specific example of the division | segmentation of the bandwidth part in 4th Embodiment. It is the flowchart which showed the procedure of SRS mapping in 5th Embodiment. It is the schematic which shows the specific example of the division | segmentation of the bandwidth part in 4th Embodiment. It is the sequence diagram which showed the detailed procedure of the process in 6th Embodiment. It is the sequence diagram which showed the detailed procedure of the process in 7th Embodiment.

Hereinafter, a plurality of embodiments of the present invention will be described with reference to the drawings.
<First Embodiment>
First, the mobile communication system according to the first embodiment will be described. This mobile communication system includes a base station apparatus 100 and a mobile station apparatus 200.

  First, (1) physical channel, (2) SRS resource allocation and frequency hopping, and (3) SRS configuration used by the mobile communication system of the present embodiment will be described.

(1) Physical channel Physical channels used in EUTRA and Advanced EUTRA include broadcast information channel, uplink data channel, downlink data channel, downlink control channel, uplink control channel, random access channel, synchronization signal, downlink A link reference signal and the like are included.
In EUTRA and Advanced EUTRA, the type of physical channel may be added or the channel structure may be changed in the future. Even when such a change is made, each of the present invention described below Embodiments can be applied. Reference signals include downlink reference signals and uplink reference signals.

Since the physical channel related to each embodiment of the present invention is mainly an uplink reference signal, detailed description of other physical channels is omitted or simplified.
An uplink reference signal (Uplink Reference Signal, hereinafter referred to as UL-RS) is transmitted from the mobile station apparatus to the base station apparatus. UL-RS includes a sounding reference signal (SRS) and a demodulation reference signal (DM-RS). The sounding 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 is used for uplink scheduling based on the reception quality and adjustment of uplink timing synchronization. It is a reference signal for uplink reception quality measurement. The demodulation reference signal is transmitted together with the uplink data channel, calculates the amplitude, phase, and frequency fluctuation amount of the uplink shared channel signal, and demodulates the signal transmitted using the uplink data channel. Is also used as a reference signal. The frequency width of the channel for SRS is determined according to the frequency bandwidth of the base station apparatus. Moreover, frequency hopping is applied to the SRS for the time axis link. By using this frequency hopping, a frequency diversity effect and an interference averaging effect can be obtained.

(2) SRS Resource Allocation and Frequency Hopping SRS resource allocation and frequency hopping will be described.
FIG. 1 is a schematic diagram illustrating SRS resource allocation and frequency hopping. In the figure, the horizontal axis is time, and the vertical axis is frequency. FIG. 5A shows an example of SRS resource allocation. In the example of FIG. 11A, 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. In this way, in the uplink signal in which one subframe is composed of 14 symbols, the SRS is assigned to the 14th symbol. The SRS resources (bandwidth in the frequency direction) allocated to the 14th symbol are determined based on the SRS configuration (setting items) described later according to the transmission frequency bandwidth.
Further, frequency hopping is applied to the time axis direction, which is transmitted by changing the frequency position each time transmission is performed. FIG. 4B shows an example of SRS frequency hopping. In FIG. 5B, SRS is transmitted at every transmission cycle T. As shown in the figure, hopping is performed in the frequency direction every cycle T (that is, every time it is transmitted). In other words, for each period T, different frequency bands of PUSCH are allocated to the mobile station apparatuses 1 and 2 for SRS.

(3) SRS configuration information The SRS configuration information is a parameter regarding SRS transmission set in the mobile station apparatus and the base station apparatus, for example, subcarrier transmission position, resource allocation, transmission cycle, and time offset. , SRS transmission bandwidth, frequency hopping method, cyclic shift amount, and the like.
The SRS configuration information mainly includes SRS bandwidth configuration information (hereinafter simply referred to as bandwidth (BW) configuration information) and SRS subframe configuration information (hereinafter simply referred to as subframe (SF) configuration). Information) and SRS hopping level information (hereinafter simply referred to as hopping level information). The bandwidth configuration information is used to determine the SRS bandwidth and frequency hopping pattern. Also, the subframe configuration information determines the SRS transmission period and time offset. The hopping level information is information used to determine the presence / absence of frequency hopping and the magnitude of frequency hopping.

  A configuration table is set for each of the bandwidth configuration information and the subframe configuration information. The configuration table is a table in which a plurality of parameters related to SRS are managed as a set in order to reduce the amount of signaling exchanged between the base station device and the mobile station device. This table may be uniquely determined in advance by the system, may be notified simultaneously from the base station apparatus to the mobile station apparatus as broadcast information, or notified from the base station apparatus to each individual mobile station apparatus. Also good.

In the bandwidth configuration information, an SRS bandwidth configuration table corresponding to the system bandwidth is set. Each configuration table includes an SRS bandwidth configuration index (hereinafter referred to as a bandwidth (BW) index) corresponding to the SRS system bandwidth, and an SRS bandwidth level for frequency hopping within a predetermined time ( Hereinafter, the bandwidth (BW) level) is set.
The SRS bandwidth configuration table is two-dimensional tabular data, and the entry of bandwidth configuration parameter information is uniquely determined by the bandwidth index in the row direction and the bandwidth level in the column direction. In other words, a combination of a bandwidth index and a bandwidth level and a bandwidth configuration parameter information entry have a one-to-one correspondence.

  The base station device does not send a set of bandwidth configuration parameter information values itself to the mobile station device, but selects a predetermined bandwidth index and bandwidth level as appropriate, and information on the bandwidth index and bandwidth level. Is transmitted to the mobile station apparatus. In response to this, the mobile station apparatus sets and generates SRS using predetermined bandwidth configuration parameter information set in the configuration table based on the received bandwidth index and bandwidth level information. .

What is shown in Table 1 is an example of an SRS bandwidth configuration table. For example, as shown in this table, in order to manage predetermined bandwidth configuration parameter information c00 to c33 and d00 to d33, four rows and four columns from row a0 to row a3 and from column b0 to column b3 are arranged. An SRS bandwidth configuration table consisting of a table is used.
Here, a0 to a3 indicating rows are the above-described bandwidth indexes. Further, b0 to b3 indicating columns are the above-described bandwidth levels. Although this table shows a table with 4 rows and 4 columns, tables with different numbers of rows and columns may be used.

As an example, configuration information (c02, d02), which is a set of bandwidth configuration parameter information values, is recorded at the positions of row a0 and column b2 in this table. When the base station apparatus sets (c02, d02) as the value of the bandwidth configuration parameter information, the base station apparatus notifies the mobile station apparatus of the values of the bandwidth index a0 and the bandwidth level b2. Upon receiving this notification, the mobile station apparatus, based on the SRS configuration table shared with the base station apparatus in advance, sets the bandwidth configuration parameter information (c02, d02) set at the position represented by row a0 and column b2. ) And SRS is generated based on the bandwidth configuration parameter information (c02, d02).
In the embodiment described below, when the mobile station apparatus receives a notification of row a0 and column b2 from the base station apparatus, the bandwidth configuration obtained by searching the table according to the bandwidth index and the bandwidth level. The SRS can be set using the parameter information (c02, d02), or the information itself of the notified values (a0, b2) can be used. Using the information of the value (a0, b2) itself means using the notified value a0 (for example, bandwidth index) and value b2 (bandwidth level) instead of subtracting the bandwidth configuration parameter information from the table. It is.

It should be noted that what kind of parameters are set as values to be stored in the SRS configuration table (in the above, c00 to c33 and d00 to d33) is arbitrary. For example, when a0 to a3 are bandwidth indexes and b0 to b3 are bandwidth levels (this bandwidth level includes SRS bandwidth and frequency hopping calculation parameters), parameters c00 to c33 are SRS bandwidths. And the parameters d00 to d33 can be used as frequency hopping calculation parameters (parameters necessary for calculating the frequency hopping position).
That is, at this time, the SRS bandwidth configuration table includes a bandwidth index, a bandwidth level, and bandwidth configuration parameter information.

Tables 2, 3, 4, and 5 are more specific examples of the SRS bandwidth configuration table. Each of these tables has a format of a table of 8 rows and 4 columns (that is, 0 to 7 as an SRS bandwidth (SRS-BW) index and b = 0 to 3 as an SRS bandwidth (SRS-BW) level). Have. In a specific column of a specific row, an SRS bandwidth (m _{SRS, b} ) and an SRS frequency hopping calculation parameter (N _b ) are stored as a set of bandwidth configuration parameter information values. Note that the numerical value of the SRS bandwidth is represented by the number of resource blocks (RB), and the width of one resource block is 180 kHz (kilohertz). Here, the SRS frequency hopping calculation parameter (N _b ) is used to calculate the frequency position of the SRS at the time of SRS transmission.

Each of the base station apparatus and the mobile station apparatus stores these four SRS bandwidth configuration tables (Tables 2 to 5), and these four SRS bandwidth configuration tables are connected to the base station apparatus and the mobile station apparatus. A common value is held with the station apparatus. These four SRS bandwidth configuration tables can be identified by a table identification number (bandwidth division information), and each table may be abbreviated as BP in the bandwidth part (Bandwidth Part: drawing). A) bandwidth. Specifically, the SRS bandwidth configuration table in Table 2 is for a bandwidth portion having a bandwidth of 6 resource blocks (1.08 MHz (megahertz)) or more and 40 resource blocks (7.2 MHz) or less. The SRS bandwidth configuration table in Table 3 is for a bandwidth portion having a bandwidth of more than 40 resource blocks and less than or equal to 60 resource blocks (10.8 MHz). The SRS bandwidth configuration table in Table 4 is for a bandwidth portion having a bandwidth of more than 60 resource blocks and 80 resource blocks (14.4 MHz) or less. The SRS bandwidth configuration table in Table 5 is for a bandwidth portion having a bandwidth of more than 80 resource blocks and not more than 110 resource blocks (19.8 MHz).
That is, the base station apparatus and the mobile station apparatus hold a plurality of common SRS bandwidth configuration tables in advance, and the plurality of tables are identified by a table identification number. This is bandwidth classification information representing the width classification.

FIG. 2 is a block diagram showing a schematic functional configuration of the base station apparatus 100 (first communication apparatus) according to the present embodiment. As illustrated, the base station device 100 includes a transmission unit 130 (first transmission unit), a transmission information control unit 120, a reception unit 140 (first reception unit), a bandwidth configuration table storage unit 160, And an antenna 111.
The transmission unit 130 includes a data control unit 101, a modulation and coding unit 102, a mapping unit 103, a frequency hopping unit 104, an inverse fast Fourier transform (IFFT) unit 105, and a wireless transmission unit 106.
The reception unit 140 includes a wireless transmission unit 107, a fast Fourier transform (FFT) unit 108, a demodulation / decoding unit 109, and a data extraction unit 110.

  The bandwidth configuration table storage unit 160 is configured using, for example, a ROM (Read Only Memory), and holds the SRS bandwidth configuration table described above. Each of the plurality of SRS bandwidth configuration tables corresponding to the bandwidth configuration table storage unit 160 corresponds to a table identification number (bandwidth division information). Each table is a two-dimensional table in which the row direction corresponds to the bandwidth index and the column direction corresponds to the bandwidth level, and the combination of the bandwidth index and the bandwidth level is an entry of individual bandwidth configuration parameter information. Corresponding to In other words, the bandwidth configuration table storage unit holds the bandwidth configuration parameter information in association with the combination of the bandwidth classification information, the bandwidth level, and the bandwidth index.

The transmission information control unit 120 includes a mapping control unit 112, a frequency hopping control unit 113, and a transmission frequency control unit 114.
The mapping control unit 112 sets a method for assigning resources (regions specified by frequency bands and time bands) to each channel. The frequency hopping control unit 113 sets whether or not to perform frequency hopping and which method (frequency hopping option to be described later) to be used. The transmission frequency control unit 114 sets the frequency band of the bandwidth part.

  In the transmission unit 130 of the base station device 100, the data control unit 101 receives transmission data and control data for transmission to each mobile station device 200 from an upper layer or the like. Then, the data control unit 101 uses the resources set by the mapping control unit 112 to perform control so that each data is sequentially transmitted to the mobile station apparatus 200. Further, the data control unit 101 passes a signal based on the transmission data and the control data to the modulation and coding unit 102. The modulation coding unit 102 performs modulation processing and error correction coding processing on the signal input from the data control unit 101 based on the modulation scheme and coding rate determined by the modulation code control unit (not shown). And output each data to the mapping unit 103. The mapping unit 103 and the frequency hopping unit 104 map the data input from the modulation and coding unit 102 on each subcarrier, perform frequency hopping based on the setting by the frequency hopping control unit 113, and the resulting signal Is output to the inverse fast Fourier transform (IFFT) unit 105.

  An inverse fast Fourier transform (IFFT) unit 105 performs inverse fast Fourier transform processing on the data input from the mapping unit 103 and the frequency hopping unit 104 to convert the data into a time-series baseband digital signal, and a radio transmission unit 106 Output to. The radio transmission unit 106 performs DA (digital / analog) conversion on the signal input from the inverse fast Fourier transform unit 105, up-converts the signal to a frequency suitable for transmission, and then transmits the signal to each mobile station apparatus 200 via the antenna 111. Send to.

  On the other hand, in receiving section 140, radio receiving section 107 performs AD (analog / digital) conversion on the radio signal received by antenna 111, down-converts it to a baseband signal, and then outputs it to fast Fourier transform (FFT) section 108. . A fast Fourier transform (FFT) unit 108 performs a fast Fourier transform on the signal input from the radio reception unit 107, separates it into data for each subcarrier, and outputs the data to a demapping unit (not shown). The demapping unit extracts data mapped to each subcarrier and frequency hopped, and outputs the data to the demodulation and decoding unit 109. Demodulation / decoding section 109 performs demodulation processing and error correction decoding processing on the data input from demapping section, and outputs received data after error correction decoding to data extraction section 110. Data extraction section 110 extracts the reception quality information and the uplink reception quality measurement reference signal from the received data after error correction decoding input from demodulation and decoding section 109 and outputs them to transmission information control section 120. Further, the data extraction unit 110 outputs reception data and control data other than the reception quality information and the uplink reception quality measurement reference signal to an upper layer or the like.

  The mapping control unit 112 is input with resource data that can be used by each mobile station apparatus 200, intermittent transmission / reception cycles, transmission data channel format, control data indicating buffer status, and the like from an upper layer. Based on this control data, the mapping control unit 112 performs downlink scheduling and uplink scheduling. A modulation code control unit (not shown) determines a modulation scheme and a coding rate to be applied to each data based on reception quality information transmitted from mobile station apparatus 200 and received by reception unit 140. The transmission frequency control unit 114 performs frequency selection scheduling processing applied to each data based on the reception quality information transmitted from the mobile station device 200 and received by the reception unit 140 and the reference signal for uplink reception quality measurement. In this embodiment, the SRS resource allocation (mapping) method and the SRS frequency hopping method are determined by the transmission information control unit 120. A part of the resulting information is transmitted to the mobile station apparatus together with transmission data and control data as frequency band instruction information and scheduling information including resource allocation information and frequency hopping information. Since the information stored in the bandwidth configuration table storage unit 160 is also stored in the bandwidth configuration table storage unit 260 on the mobile station apparatus side, information on the SRS resource allocation method and the SRS frequency hopping method It is sufficient to transmit only a part of them from the base station apparatus side to the mobile station apparatus side. On the mobile station device side, information is read out from the bandwidth configuration table storage unit 260 on the mobile station device side based on the information that exists from the base station device, so that it is necessary for the SRS resource allocation method and the SRS frequency hopping method. This is because all information can be obtained. The frequency band instruction information is information for the base station apparatus to instruct the mobile station apparatus to transmit an uplink signal using a predetermined frequency band and an arbitrary predetermined frequency bandwidth. . At this time, the base station apparatus designates the frequency band and the frequency bandwidth in consideration of the communication situation. For example, it is frequency band instruction information for the base station apparatus to instruct the mobile station apparatus to transmit an uplink signal using 50 MHz from a frequency of 2.5 GHz to 2.55 GHz. Further, the transmission information control unit 120 considers the communication status between the mobile station apparatuses obtained from the reception unit 140, which configuration table is used, which bandwidth index, and which bandwidth level to select. The configuration (setting item) is determined, and information on the result is also transmitted from the transmission unit 130 to the mobile station apparatus 200.

FIG. 3 is a block diagram showing a schematic functional configuration of the mobile station apparatus 200 (second communication apparatus) according to the present embodiment. As illustrated, the mobile station apparatus 200 includes a transmission unit 240 (second transmission unit), a reception unit 250 (second reception unit), a reception quality information control unit 220, a reference signal control unit 230, a bandwidth, A configuration table storage unit 260 and an antenna 211 are included.
The transmission unit 240 includes a data control unit 201, a modulation and coding unit 202, a mapping unit 203, a frequency hopping unit 204, an inverse fast Fourier transform (IFFT) unit 205, and a wireless transmission unit 206. The
The receiving unit 250 includes a radio receiving unit 207, a fast Fourier transform (FFT) unit 208, a demodulation / decoding unit 209, and a data extraction unit 210.
The reception quality information control unit 220 includes a reception quality information generation unit 212 and a reception quality measurement unit 213.
The reference signal control unit 230 includes a reference signal generation unit 214 and a reference signal multiplexing unit 215.
Note that the configuration of the bandwidth configuration table storage unit 260 is the same as that of the bandwidth configuration table storage unit 160 on the base station apparatus side, and therefore detailed description thereof is omitted here.

  In mobile station apparatus 200, transmission data for transmission to base station apparatus 100 and control data are input to data control section 201 from an upper layer or the like. Then, the data control unit 201 performs control so that each data is sequentially transmitted to the base station apparatus 100. The data control unit 201 also passes transmission data and control data signals to the modulation and coding unit 202. Modulation coding section 202 performs modulation processing and error correction coding processing on the signal output from data control section 201, and outputs each data to mapping section 203 and frequency hopping section 204. Mapping section 203 and frequency hopping section 204 map transmission data and control data output from modulation and coding section 202 onto each subcarrier, perform frequency hopping, and output to inverse fast Fourier transform (IFFT) section 205 To do.

  An inverse fast Fourier transform (IFFT) unit 205 subjects the data input from the mapping unit 203 and the frequency hopping unit 204 to inverse fast Fourier transform processing, converts the data into a time-series baseband digital signal, and a radio transmission unit 206. Output to. The radio transmission unit 206 performs digital / analog conversion on the signal input from the inverse fast Fourier transform unit 205, up-converts the signal to a frequency suitable for transmission, and then transmits the signal to the base station apparatus 100 via the antenna 211. .

  The wireless reception unit 207 performs analog / digital conversion on the wireless signal received from the antenna 211 and outputs the result to the fast Fourier transform unit 208. The fast Fourier transform unit 208 performs fast Fourier transform on the signal input from the wireless reception unit 207, separates it into data for each subcarrier, and outputs the data to a demapping unit (not shown). The demapping unit extracts data mapped to each subcarrier and transmits the data to the demodulation / decoding unit 209. Demodulation / decoding section 209 performs demodulation processing and error correction decoding processing on the data input from demapping section, and outputs the received data after error correction decoding to data extraction section 210. Data extraction section 210 extracts control information for specifying the transmission format of the uplink data from the data after error correction decoding input from demodulation decoding section 209 and outputs the control information to reception quality information control section 220. Further, the data extraction unit 210 extracts a reference signal from the data after the above error correction decoding and outputs the reference signal to the reference signal control unit 230. Further, the data extraction unit 210 outputs received data and control data other than the control information and the reference signal to an upper layer or the like.

  In reception quality information control section 220, reception quality measurement section 213 calculates the reception quality (SNR, SNIR, bit error rate, etc.) of the signal received by reception section 250 from base station apparatus 100. Reception quality information generation section 212 generates reception quality information to be transmitted to base station apparatus 100 based on the information calculated by reception quality measurement section 213.

  The reference signal control unit 230 performs mapping and frequency hopping of the uplink reception quality measurement reference signal transmitted to the base station device based on the frequency band instruction information and scheduling information from the base station device 100 extracted by the data extraction unit 210. Control. The reference signal multiplexing unit 215 multiplexes the uplink reception quality measurement reference signal generated by the reference signal generation unit 214 with the transmission data and control data generated by the transmission unit 240.

  The mobile communication system according to the present embodiment is applied when the uplink transmission bandwidth exceeds the maximum uplink transmission bandwidth proposed by EUTRA. In this case, the mobile station apparatus 200 transmits an uplink signal using a transmission bandwidth that spans a plurality of frequency bands.

  In addition, the mobile communication system according to the present embodiment is applied even when a necessary transmission bandwidth cannot be ensured depending on a communication state even within the range of the maximum uplink transmission bandwidth defined in EUTRA. In this case, the mobile station apparatus 200 uses a plurality of frequency bands narrower than the above uplink maximum transmission bandwidth. For example, a continuous 20 MHz frequency band cannot be assigned to a mobile station apparatus having a maximum uplink transmission bandwidth of 20 MHz, and 20 MHz is formed using two discontinuous frequency bands of 10 MHz each, The present invention can also be applied to a case where uplink transmission is performed using a frequency band of 20 MHz.

  FIG. 4 is a schematic diagram illustrating an example of a frequency band configuration according to the present embodiment. In the figure, (a) is a single frequency band, that is, a single carrier (hereinafter referred to as SC), and (b) is a plurality of frequency bands obtained by dividing a single carrier in the frequency domain. In the case of (bandwidth portion), (c) shows an example of the configuration of each frequency band in the case of a plurality of discontinuous frequency bands, and the horizontal axis is the frequency. However, the specific frequency band configuration is not limited to these.

  For example, in EUTRA, one component carrier is allocated to one mobile station apparatus. However, in this embodiment, a plurality of frequency bands are given to one mobile station apparatus in consideration of Advanced EUTRA and the like. And each of these frequency bands is a bandwidth portion. A bandwidth part management table for managing individual bandwidth parts will be described later.

  Each frequency band shown in the figure includes a PUCCH (Physical Uplink Channel, physical uplink control channel), PUSCH (Physical Uplink Shared Channel), and SRS area. In the same figure, each area | region shown by code | symbol 801a, 801b, 801c is PUSCH, each area | region shown by code | symbol 802a, 802b, 802c is PUCCH, and each area | region shown by code | symbol 803a, 803b, 803c is for SRS. It is a frequency band. As shown in the figure, the SRS frequency band overlaps with a part of the PUSCH frequency band, but as described above, the SRS area and the PUSCH area are divided in the time direction (in the frequency band). Of the symbols from the first to the 14th, the 14th symbol is SRS).

  BP1 to BP3 shown in (b) and (c) of the figure are bandwidth portions. The bandwidth portion also includes a component carrier. The configuration shown in FIG. 5A is composed of a single bandwidth portion. There is an SRS frequency band in each bandwidth portion, and the mobile station apparatus transmits an uplink reception quality measurement reference signal (SRS) for each bandwidth portion using this SRS frequency band. This bandwidth part (BP1, BP2, BP3,...) Exceeds the continuous uplink maximum transmission frequency band (all frequency bands) in which the mobile station apparatus transmits SRS or the uplink transmission frequency band defined by EUTRA. Alternatively, a continuous frequency band (wide frequency band) may be divided, or a plurality of discontinuous frequency bands may be operated as one wideband system. That is, the continuous frequency band is divided into bandwidth parts (BP1, BP2, BP3,...), And the mobile station apparatus can transmit the SRS to the base station apparatus using each frequency band divided into the bandwidth parts. . In addition, a plurality of discontinuous frequency bands operated as one wideband system are respectively used as bandwidth parts (BP1, BP2, BP3,...), And the mobile station apparatus uses each frequency band (bandwidth part) to perform SRS. May be transmitted to the base station apparatus. Further, the frequency bandwidths of the respective bandwidth portions included in one system may be the same or different from each other.

  As shown in the figure, PUCCHs are arranged at both the bottom (the band with the lowest frequency) and the top (the band with the highest frequency) in each bandwidth portion. Moreover, PUSCH is arrange | positioned in the intermediate | middle band pinched | interposed between those PUCCH. In addition, the frequency band for SRS is arranged in a predetermined band having a lower frequency in the PUSCH, and frequency hopping is performed on the frequency band for SRS as described below.

  Further, a single carrier, that is, a continuous frequency band may be divided to constitute a plurality of bandwidth portions. Further, a plurality of discontinuous frequency bands may be used, and each of these frequency bands may be configured as a bandwidth portion. Furthermore, one frequency band (single carrier) in the discontinuous frequency band may be divided and configured as a plurality of bandwidth portions.

5 and 6 are schematic views for explaining carrier aggregation performed by the base station apparatus 100 and the mobile station apparatus 200 according to the present embodiment.
FIG. 5 represents a plurality of bandwidth portions arranged on the frequency axis. They are indicated by f1, f2, f3, and f4 in order from the lowest frequency side. Each of these bandwidth portions has a frequency band that is discontinuous with the other bandwidth portions.
FIG. 6 shows carrier aggregation using the above f1 to f4. The transmitter and receiver shown in the figure are a transmitter part of a base station apparatus and a receiver part of a mobile station apparatus. Alternatively, the transmission apparatus and the reception apparatus shown in the figure are a transmitter part of the mobile station apparatus and a receiver part of the base station apparatus. As shown in the figure, the transmission apparatus divides data to be transmitted (ABCD) into A, B, C, and D, and separates them into individual antennas using the bandwidth portions of f1, f2, f3, and f4, respectively. And its associated individual high frequency circuit. The receiving apparatus receives the radio signals of these bandwidth portions, demodulates them into data A, B, C, D based on the respective received signals, and reconstructs these data into the original data (ABCD). . By using such carrier aggregation, even when a continuous wide frequency band cannot be used, data can be transmitted from the transmission device to the reception device at a higher speed.

FIG. 7 is a schematic diagram illustrating a structure of a bandwidth part management table held by the base station apparatus and the mobile station apparatus in this embodiment for managing the setting of the bandwidth part. This table is realized by using, for example, a semiconductor memory in each apparatus. As shown in the figure, this bandwidth part management table is in the form of a two-dimensional table and includes bandwidth part identification information, start frequency, bandwidth (number of RBs), SRS bandwidth index, and SRS bandwidth. and level has a frequency hopping option, and frequency position shift information, the parameter m _SRS, and _b, and the column of each item of the parameter N _b. Each row in this table corresponds to each bandwidth portion.

The bandwidth part identification information is information for uniquely identifying each bandwidth part. The start frequency represents the start frequency of the bandwidth portion. The bandwidth represents the number of resource blocks in the bandwidth portion. The SRS bandwidth index and the SRS bandwidth level are the bandwidth index and the bandwidth level in the SRS bandwidth configuration table shown in Tables 2 to 5, respectively. The frequency position shift information is information (details will be described later) indicating whether or not to perform frequency position shift in frequency hopping within the bandwidth portion. The parameters m _{SRS, b} and N _b are values obtained from entries in the SRS bandwidth configuration table and used as parameters of the bandwidth part.

Among these items included in the bandwidth portion management table, the bandwidth portion identification information, start frequency, and bandwidth items are determined in advance prior to the processing procedure described below. Both stations on the station apparatus 200 side hold common information. Other items, that is, the SRS bandwidth index, the SRS bandwidth level, the frequency hopping option, the frequency position shift information, and the parameters m _{SRS, b} and N _b are determined by the base station apparatus 100 according to the procedure described below. Each of the mobile station devices 200 sets common information in the bandwidth portion management table in the own device.

  FIG. 8 is a sequence diagram showing detailed procedures of SRS resource allocation (mapping) and SRS transmission in the present embodiment. As shown in the figure, base station apparatus 100 allocates SRS resources, and mobile station apparatus 200 performs settings in accordance with the allocation. Hereinafter, it demonstrates along this procedure.

First, in step s101, the base station apparatus 100 selects a bandwidth portion to which SRS is allocated. In step s102, the base station apparatus 100 selects the bandwidth portion having the minimum bandwidth (minimum BW) as the reference bandwidth portion (reference BP) from the plurality of bandwidth portions selected in step s101. In step s103, the base station apparatus 100 sets a predetermined bandwidth index in the reference bandwidth portion. In step s104, the base station apparatus 100 sets a predetermined bandwidth level in the reference bandwidth portion.
In step s105, the base station apparatus 100 calculates a bandwidth (BW) ratio between the reference bandwidth part selected in step s102 and the SRS band in the reference bandwidth part. That is, bandwidth ratio = SRS bandwidth of the reference bandwidth portion / bandwidth of the entire reference bandwidth portion.

  Then, base station apparatus 100 sets a bandwidth index and a bandwidth level for each bandwidth portion selected in step s101. Specifically, for example, the SRS bandwidth of each bandwidth portion is set so that the ratio of the bandwidth of the entire bandwidth portion to the bandwidth of the SRS in the bandwidth portion is constant. To do.

Here, a specific setting method for each bandwidth portion is as follows. In the setting of the SRS band of this embodiment, the resource allocation information common to the bandwidth part is the bandwidth index, the bandwidth level, and the bandwidth ratio calculated in step s105.
The transmission information control unit 120 of the base station apparatus 100 appropriately sets the SRS band for the reference bandwidth portion. Thereby, a table identification number corresponding to the bandwidth of the reference bandwidth portion, a bandwidth index and a bandwidth level corresponding to the setting of the SRS band are determined.
For the bandwidth part other than the reference bandwidth part, the transmission information control unit 120 of the base station apparatus 100 calculates the SRS bandwidth from the bandwidth of the bandwidth part and the above bandwidth ratio. That is, the SRS bandwidth of the bandwidth portion other than the reference bandwidth portion = the bandwidth of the entire bandwidth portion × the bandwidth ratio. Then, in the SRS bandwidth configuration table corresponding to the bandwidth of the bandwidth portion, the bandwidth configuration parameter information corresponding to the SRS bandwidth calculated here is found, and the bandwidth configuration parameter information is supported. Set the bandwidth index and bandwidth level to be used for that bandwidth portion. When finding bandwidth configuration information corresponding to the SRS bandwidth calculated according to the bandwidth ratio in the SRS bandwidth configuration table, the bandwidth configuration having exactly the same SRS bandwidth due to a fractional number in calculation, etc. If the configuration parameter information is not found, the bandwidth configuration parameter information having the closest SRS bandwidth is selected. In addition, when there are a plurality of corresponding bandwidth configuration parameter information in the table, for example, the bandwidth configuration parameter information having the largest bandwidth level is selected, and the corresponding bandwidth configuration parameter information is still selected. If there are a plurality of bandwidth configuration parameters, the bandwidth configuration parameter information having the smallest bandwidth index is selected.

This will be described with a specific example. The bandwidth of the reference bandwidth portion is 20 resource blocks (that is, at this time, Table 2 is selected and the corresponding table identification number is determined), and the bandwidth is set in the setting of the SRS bandwidth of the reference bandwidth portion. When the level is b = 3 and the bandwidth index is 0, the SRS bandwidth (m _{SRS, b} ) in the corresponding bandwidth configuration parameter information is 4 resource blocks. That is, the ratio of the SRS bandwidth to the entire bandwidth of the reference bandwidth portion is “0.2” (= 4/20). At this time, if the bandwidth of a certain bandwidth portion other than the reference bandwidth portion is 60 resource blocks, the SRS bandwidth of this bandwidth portion is calculated using the above bandwidth ratio (“0.2”). It is calculated as 12 (= 60 * 0.2). For the various parameters other than the SRS bandwidth (for example, the table identification number, the bandwidth index, the bandwidth level, and the frequency hopping parameter that is the bandwidth configuration parameter), the same parameters as the reference bandwidth portion are used. That is, only the SRS bandwidth needs to be newly calculated by the mobile station apparatus in a certain bandwidth portion other than the reference bandwidth portion.

  Here, when the base station apparatus 100 sets the bandwidth index and the bandwidth level, the communication status in the cell of the base station apparatus (number of mobile station apparatuses in the cell, mobile station apparatus in the cell) Base the appropriate value according to the distribution status of the mobile station device (whether the mobile station device is close to the base station device or far from the base station device), the frequency bandwidth used, scheduling, etc.) The station apparatus 100 selects and sets. For example, the base station apparatus 100 determines the bandwidth index according to the bandwidth that can be used by the mobile station apparatus. Further, for example, the base station device 100 can occupy one bandwidth portion, and when the mobile station device is located close to the base station device 100, the base station device 100 has a small bandwidth level value. (B = 0, etc.), and when the mobile station device shares one bandwidth part with another mobile station device or the mobile station device is located far from the base station device 100, a large bandwidth level (B = 3 etc.) is set.

Then, in step s106, transmission information control section 120 of base station apparatus 100 selects one of frequency hopping options 1 to 3. This frequency hopping option will be described later.
Then, in L101, the base station apparatus 100, the resource allocation information (here, the bandwidth ratio, the bandwidth index, and the bandwidth level), and information on the frequency hopping option selected in step s106. Is transmitted to the mobile station apparatus 200.

In response to this, the mobile station apparatus 200 sets a table identification number of the reference bandwidth portion based on the bandwidth of the reference bandwidth portion in step s107. Then, based on the received resource allocation information, the mobile station apparatus 200, for each bandwidth part other than the reference bandwidth part, in step s108, the same table identification number, bandwidth index, and bandwidth as the reference bandwidth part Set the level. Then, in step s109, the mobile station apparatus 200 sets the SRS bandwidth (SRS-BW) of each bandwidth portion. That is, the mobile station apparatus 200 sets the SRS bandwidth of the bandwidth portion other than the reference bandwidth portion based on the bandwidth other than the reference bandwidth portion and the bandwidth ratio of the reference bandwidth portion. The procedure for this setting is the same as the procedure for setting the SRS bandwidth described as the operation on the base station apparatus 100 side.
In step s110, mobile station apparatus 200 generates an SRS for each bandwidth portion based on the above information and settings.
Then, in L102, the mobile station apparatus 200 transmits an SRS to the base station apparatus 100.

  As described in step s106 above, the base station apparatus 100 selects the SRS frequency hopping option. The SRS frequency hopping method in the present embodiment will be described below.

  9, 10 and 11 are schematic diagrams showing frequency hopping options 1 to 3 of the SRS according to the present embodiment, respectively. For ease of explanation, these drawings show a case where the number of bandwidth portions is two. In these drawings, the horizontal axis direction corresponds to the frequency, and the vertical axis direction corresponds to the time (temporal transition). In these figures, the resource region without hatching is PUSCH, the resource region with hatching with dots is PUCCH, and the resource region with hatching with hatching is a band for SRS. Also, the circled numbers in the figure represent the stage (order) of the temporal transition of the frequency band for SRS.

In the frequency hopping option 1 shown in FIG. 9, first, frequency hopping (FH: Frequency Hopping) is performed in order of steps 1 to 3 so that the SRS allocated to BP1 covers the entire frequency band of PUSCH of BP1 sequentially. Next, the process proceeds to BP2 (step 4), and frequency hopping of SRS assigned to BP2 is performed in the order of steps 4-6. Then, after sequentially covering the entire band of BP2, the process proceeds to BP1 again (step 7), and frequency hopping is performed again on the band of BP1.
If BP3 is present, the entire band of BP2 is sequentially covered, and then BP3 is sequentially covered, and then the process proceeds to BP1 again.

In the frequency hopping option 2 shown in FIG. 10, first, the first band included in BP1 is used for SRS (step 1), and then the process proceeds to BP2 (step 2). Then, return to BP1 (step 3) to use the next band included in BP1, and then move again to BP2 (step 4) to use the next band included in BP2. Similarly, hopping is repeated until all the bands of BP1 and BP2 are covered while BP1 and BP2 are alternately frequency hopped. Thereafter, in step 7, the band returns to the first band of BP1, and thereafter the same frequency hopping is repeated.
If BP3 exists, the first band included in BP2 is used, the first band included in BP3 is used, and then the next band of BP1 is returned. repeat.

In the frequency hopping option 3 shown in FIG. 11, the SRS assigned in each of BP1 and BP2 performs frequency hopping simultaneously and sequentially.
Even when BP3 exists, it is the same to perform frequency hopping simultaneously.

In the case of a frequency hopping method that prescribes the order over a plurality of bandwidth portions as in the method of frequency hopping option 1 or 2 above, the frequency hopping order of SRS assigned to the bandwidth portion is The station apparatus determines and the information is transmitted to the mobile station apparatus. When mapping and frequency hopping are performed in this way, one SRS is transmitted at a certain point of time, so that compatibility with the specification related to SRS in EUTRA can be ensured and the specification of Advanced EUTRA can be supported.
When frequency hopping is simultaneously performed in each of a plurality of bandwidth portions as in the method of frequency hopping option 3 described above, SRS is mapped to continuous frequency bands and frequency hopping is performed.

  The base station apparatus 100 designates one of the frequency hopping options 1 to 3 according to the communication status of the mobile station apparatus in the cell covered by itself and the surrounding environment, and the frequency hopping information together with the scheduling information. To the mobile station apparatus. As an example, the base station apparatus designates option 1 when the bandwidth part is in a band relatively close to each other, and the base station apparatus designates option 2 when the bandwidth part is in a band relatively far from each other. If it is safe to assign multiple SRSs at the same time (for example, a situation where the amount of data traffic in the entire system is small and a relatively large bandwidth may be allocated for SRS at one point) The base station apparatus designates option 3. Note that the base station apparatus may notify hopping method information using a broadcast information channel. Further, the frequency hopping method may be uniquely determined in advance by the system, and the base station device and the mobile station device may perform frequency hopping accordingly.

The reference signal control unit 230 of the mobile station device 200 sets the SRS configuration based on the SRS mapping information transmitted from the base station device. That is, the mobile station apparatus autonomously sets the SRS configuration for each remaining frequency bandwidth based on the configuration of the frequency band that is the minimum bandwidth among the plurality of allocated bandwidth portions. At this time, the mobile station device 200 receives only the bandwidth information of the bandwidth portion having the minimum bandwidth from the base station device 100, but the other bandwidth portions are the same as those used by the base station device 100. An SRS band is determined by an algorithm.
For example, when the frequency bandwidth of the bandwidth portion having the minimum bandwidth is 5 MHz and the frequency bandwidth of each of the remaining bandwidth portions is 20 MHz, the bandwidth ratio between both bandwidth portions is 5 MHz: 20 MHz = 1. : 4, so that only the SRS bandwidth is extracted from the 5 MHz SRS configuration information that satisfies this proportional relationship, and the SRS bandwidth that is four times the 5 MHz bandwidth portion is assigned to the 20 MHz bandwidth portion. . For parameters other than the SRS bandwidth (for example, frequency hopping calculation parameters and bandwidth levels shown in Table 1), a common parameter value is used regardless of the bandwidth of the bandwidth portion.

  Based on the information on the frequency hopping method and the SRS mapping method transmitted from the base station device 100, the mobile station device 200 generates an SRS in the reference signal control unit 213. That is, the SRS is transmitted in a predetermined time zone (predetermined symbol timing) in the frequency band used by the PUSCH by the resource mapping already described. Transmitting section 240 of the mobile station apparatus transmits temporally multiplexed SRS together with transmission data and control data to the base station apparatus.

  In this embodiment, the bandwidth ratio is calculated on the base station apparatus 100 side, the bandwidth ratio is transmitted from the base station apparatus 100 to the mobile station apparatus 200, and the bandwidth ratio is calculated on the mobile station apparatus 200 side. Although the calculation used is performed, the bandwidth ratio calculation itself may be performed on the mobile station apparatus 200 side instead.

<Second Embodiment>
Next, a second embodiment of the present invention will be described. Since the functional configuration of the device in the second embodiment is the same as that shown in the first embodiment, the description thereof is omitted here.

  In the second embodiment, in particular, instead of selecting the bandwidth portion of the minimum bandwidth first and using the bandwidth portion as a reference, the bandwidth portion arbitrarily designated from the plurality of bandwidth portions is selected. Based on the bandwidth, resource allocation (mapping) of SRS for each bandwidth portion is set.

In the present embodiment, the transmission information control unit 120 of the base station apparatus uses, as a reference bandwidth portion, a bandwidth portion having a bandwidth that does not exceed a predetermined maximum uplink transmission frequency bandwidth from a plurality of bandwidth portions. And calculating a bandwidth ratio that is a ratio of the entire bandwidth of the reference bandwidth portion and the bandwidth of the reference signal bandwidth in the reference bandwidth portion, and a plurality of bandwidths based on the calculated bandwidth ratio. The reference signal band in the bandwidth portion is allocated according to the bandwidth of the bandwidth portion.
Further, the reference signal control unit 230 of the mobile station apparatus selects a bandwidth portion having a bandwidth that does not exceed a predetermined maximum uplink transmission frequency bandwidth from a plurality of bandwidth portions as a reference bandwidth portion, and A reference signal for the reference bandwidth portion based on the bandwidth configuration parameter information read from the bandwidth configuration table storage unit using the bandwidth classification information corresponding to the reference bandwidth portion and the received bandwidth level and bandwidth index. The bandwidth for the reference signal is assigned to the bandwidth portion other than the reference bandwidth portion in accordance with the bandwidth ratio received and the bandwidth ratio other than the reference bandwidth portion.

FIG. 12 is a sequence diagram showing detailed procedures of SRS resource allocation (mapping) and SRS transmission in the present embodiment. Hereinafter, it demonstrates along this procedure.
First, in step s201, the base station apparatus 100 selects a plurality of bandwidth portions to which SRS can be allocated. Next, in step s202, the base station apparatus 100 corresponds to the bandwidth portion having the corresponding SRS bandwidth configuration table (that is, the bandwidth portion corresponding to the bandwidth portion) from among the plurality of bandwidth portions selected in step s201. The SRS bandwidth configuration table is present), and this is used as the reference bandwidth portion. Unlike the case of the first embodiment, in this embodiment, the selected reference bandwidth portion does not necessarily have the minimum bandwidth.
Next, in step s203, the base station apparatus 100 sets a predetermined bandwidth index in the reference bandwidth portion. Next, in step s204, the base station apparatus 100 sets a predetermined bandwidth level in the reference bandwidth portion.
Next, in step s205, the base station apparatus 100 obtains a bandwidth (BW) ratio between the reference bandwidth part selected in step s202 and the SRS band in the reference bandwidth part.

Then, the base station apparatus 100 sets a predetermined bandwidth index and a bandwidth level for each bandwidth portion selected in step s201 based on the above-described bandwidth ratio. Although the method of selecting the reference bandwidth portion is different from that in the first embodiment, the processing for setting the bandwidth index and bandwidth level for each bandwidth portion is the same as the processing in the first embodiment. Since they are the same, detailed description of a specific setting method is omitted here.
Also in the setting of the SRS band of the present embodiment, the resource allocation information common to the bandwidth part is the bandwidth index, the bandwidth level, and the bandwidth ratio calculated in step s205.
In step s206, the transmission information control unit 120 of the base station apparatus 100 selects any one of the frequency hopping options 1 to 3.

  Then, in L201, the base station apparatus 100 determines the resource allocation information (here, the bandwidth ratio, the bandwidth index, and the bandwidth level) and the information on the frequency hopping option selected in step s206. Is transmitted to the mobile station apparatus 200. At this time, the base station apparatus 100 transmits information (frequency position, bandwidth, etc.) related to selection of the reference bandwidth portion as necessary.

In response, mobile station apparatus 200 sets a table identification number for the reference bandwidth portion based on the bandwidth of the reference bandwidth portion in step s207. Then, based on the received resource allocation information, the mobile station apparatus 200, for each bandwidth part other than the reference bandwidth part, in step s208, the same table identification number, bandwidth index, and bandwidth as the reference bandwidth part Set the level. Then, in step s209, the mobile station device 200 sets the SRS bandwidth of each bandwidth portion. In this setting, the method for selecting the reference bandwidth portion is the same as that on the base station apparatus side. Further, the procedure for setting the SRS bandwidth of each bandwidth portion is the same as the processing procedure as the operation on the base station apparatus 100 side. That is, the mobile station apparatus autonomously sets the SRS configuration of each of the other bandwidth portions based on the configuration and bandwidth ratio of the designated reference bandwidth portion among the allocated bandwidth portions. To do. In step s210, the mobile station apparatus 200 generates an SRS for each bandwidth portion based on the above information.
And in L202, the mobile station apparatus 200 transmits SRS with respect to the base station apparatus 100. FIG.
The frequency hopping in this embodiment is the same as that described in the first embodiment.

  In the second embodiment, since it is not always necessary to select the bandwidth portion having the minimum bandwidth as the reference bandwidth portion, the setting can be made more flexibly.

<Third Embodiment>
Next, a third embodiment of the present invention will be described. Since the functional configuration of the device in the third embodiment is the same as that shown in the first embodiment, the description thereof is omitted here.

  The third embodiment is applied particularly to a mobile communication system in which the bandwidth of the bandwidth portion to which SRS can be allocated is up to the uplink maximum frequency bandwidth in which the SRS configuration is set. It is. For example, in the EUTRA specification, the maximum uplink frequency bandwidth is 20 MHz or less. In the present embodiment, there are a basic form and modified examples 1 to 3 as described below.

<Third Embodiment Basic Form>
In this basic form of the present embodiment, the transmission information control unit 120 of the base station apparatus selects a bandwidth part having the smallest bandwidth among the plurality of bandwidth parts as the reference bandwidth part, and the reference bandwidth part By assigning the reference signal bandwidth to the reference bandwidth in the reference bandwidth portion and applying the bandwidth level and bandwidth index to the other bandwidth portions of the plurality of bandwidth portions. The reference signal band is assigned to the other bandwidth portion.
Further, the reference signal control unit 230 of the mobile station apparatus selects a bandwidth part having the minimum bandwidth from among the plurality of bandwidth parts as a reference bandwidth part, and bandwidth classification information corresponding to the reference bandwidth part And assigning a reference signal band for the reference bandwidth portion according to bandwidth configuration parameter information read from the bandwidth configuration table storage unit using the received bandwidth level and bandwidth index, and other bandwidths For the reference signal for the bandwidth part according to the bandwidth configuration parameter information read from the bandwidth configuration table storage unit using the bandwidth classification information corresponding to each of the width parts and the received bandwidth level and bandwidth index. Allocate bandwidth.

FIG. 13 is a sequence diagram showing a detailed procedure of processing in the basic form of the present embodiment. Hereinafter, it demonstrates along this figure.
In step s301, the base station apparatus 100 selects a bandwidth part to which SRS can be allocated. Next, in step s302, the base station apparatus 100 selects a bandwidth portion having the minimum bandwidth (BW) as the reference bandwidth portion from the plurality of bandwidth portions selected in step s001. In step s303, the base station apparatus 100 sets a predetermined bandwidth index in the reference bandwidth portion. In step s304, the base station apparatus 100 sets a predetermined bandwidth level in the reference bandwidth portion.

  Then, the base station apparatus 100 sets a bandwidth index and a bandwidth level for each bandwidth portion selected in step s301. In the basic form of the present embodiment, the bandwidth index and bandwidth level set for the reference bandwidth portion are also set as they are for other bandwidth portions.

Here, a specific setting method of the bandwidth index and the bandwidth level to each bandwidth portion is as follows. In the setting of the SRS band in the basic form of the present embodiment, the resource allocation information common to the bandwidth part is a bandwidth index and a bandwidth level.
The transmission information control unit 120 of the base station apparatus 100 appropriately sets the SRS band for the reference bandwidth portion. Thereby, a table identification number corresponding to the bandwidth of the reference bandwidth portion, a bandwidth index and a bandwidth level corresponding to the setting of the SRS band are determined.
The transmission information control unit 120 of the base station apparatus 100 uses the bandwidth index and the bandwidth level determined above for the reference bandwidth portion for the bandwidth portion other than the reference bandwidth portion. At this time, the SRS bandwidth configuration table corresponding to the bandwidth of the bandwidth portion is used, and the bandwidth configuration parameter information of the entry specified by the bandwidth level and the bandwidth index in the SRS bandwidth configuration table. Is used.
This will be described with a specific example. The bandwidth of the reference bandwidth portion is 50 resource blocks (that is, at this time, Table 3 is selected and the corresponding table identification number is determined), and in setting the SRS bandwidth of the reference bandwidth portion, the bandwidth When the level is b = 2 and the bandwidth index is 0, the SRS bandwidth (m _{SRS, b} ) in the corresponding bandwidth configuration parameter information is 12 resource blocks, and the SRS frequency hopping calculation parameter (N _b ) Is 2. When the bandwidth of a certain bandwidth portion other than the reference bandwidth portion is 80 resource blocks (that is, the SRS bandwidth configuration table corresponding to this bandwidth portion is Table 4), the above bandwidth The SRS bandwidth configuration table (Table 4) is searched using the level (b = 2) and the bandwidth index (0). In Table 4, as the bandwidth configuration parameter information corresponding to the bandwidth level (b = 2) and the bandwidth index (0), the SRS bandwidth (m _{SRS, b} ) is 12 resource blocks. The frequency hopping calculation parameter (N _b ) is 2. In the bandwidth part, setting using the bandwidth configuration parameter information is performed. For the bandwidth part, the base station apparatus 100 sets b = 2 as the bandwidth level and 0 as the bandwidth index.

  Then, in step s305, transmission information control section 120 of base station apparatus 100 selects one of frequency hopping options 1 to 3.

  Then, in L301, the base station apparatus 100 sends the resource allocation information (here, the above bandwidth index and the above bandwidth level) and the information on the frequency hopping option selected above to the mobile station apparatus 200. Send to.

In response, mobile station apparatus 200 sets a table identification number corresponding to each bandwidth portion based on the bandwidth of each bandwidth portion in step s306. Then, based on the received resource allocation information, the mobile station apparatus 200 uses the bandwidth index and the bandwidth level received from the base station apparatus as they are regardless of the bandwidth of each bandwidth portion in step s307. Apply to part and set SRS bandwidth. That is, the mobile station apparatus autonomously sets the SRS configuration for each remaining bandwidth portion based on the configuration of the reference bandwidth portion among the plurality of allocated bandwidth portions. The procedure for setting the SRS bandwidth is the same as the procedure for setting the SRS bandwidth described as the operation on the base station apparatus 100 side.
In step s308, the mobile station apparatus 200 generates an SRS for each bandwidth portion based on the above information.
In L302, the mobile station apparatus 200 transmits an SRS to the base station apparatus 100.
Note that frequency hopping in this embodiment is the same as that described in the first embodiment.

<Third Embodiment Modification 1>
In the first modification of the present embodiment, the transmission information control unit 102 of the base station apparatus selects a plurality of bandwidth portions having a bandwidth that does not exceed a predetermined maximum uplink transmission frequency bandwidth, and By applying the common bandwidth configuration parameter information held in the bandwidth configuration table storage unit to the bandwidth part, reference signal bands are assigned to the plurality of bandwidth parts.
Also, the reference signal control unit 230 of the mobile station apparatus selects a plurality of bandwidth portions having a bandwidth that does not exceed a predetermined maximum uplink transmission frequency bandwidth, and for each of the plurality of bandwidth portions. Then, by applying the received bandwidth configuration parameter information as it is, a reference signal band is assigned to each bandwidth portion.

FIG. 14 is a sequence diagram illustrating a detailed procedure of processing in the first modification of the present embodiment. Hereinafter, it demonstrates along this figure.
In step s401, the base station apparatus 100 selects a bandwidth portion to which SRS can be allocated.

Next, in step s402, base station apparatus 100 sets the table identification number of each bandwidth part from the bandwidth of the selected bandwidth part.
Next, in step s403, the base station apparatus 100 retrieves common bandwidth configuration parameter information by retrieving the SRS bandwidth configuration table corresponding to each bandwidth portion, and the obtained bandwidth configuration parameter. Set the information.

A specific setting method in step s403 is as follows. In the setting of the SRS band in the first modification of the present embodiment, the resource allocation information common to the bandwidth part is the bandwidth configuration parameter information (in the examples of Table 2 to Table 5, the SRS bandwidth and the SRS frequency hopping). Calculation parameter).
The transmission information control unit 120 of the base station apparatus 100 selects bandwidth configuration parameter information as appropriate. However, as the bandwidth configuration parameter information at this time, the bandwidth configuration parameter information that exists in the entries of the SRS bandwidth configuration table corresponding to all bandwidth portions for which the SRS bandwidth is to be set. Is selected. Then, the transmission information control unit 120 of the base station apparatus 100 searches the SRS bandwidth configuration table corresponding to the target bandwidth portion, and identifies the entry having the bandwidth configuration parameter information. However, at this time, if there are multiple entries of the same bandwidth configuration parameter information in the SRS bandwidth configuration table to be searched, the entry with the larger bandwidth index is selected. Furthermore, if there are multiple entries of the same bandwidth configuration parameter information in the bandwidth index, the entry with the higher bandwidth level is selected.
This will be described using a specific example. When there are a plurality of bandwidth portions to be set for the SRS bandwidth, and at least one of the bandwidth portions corresponds to each of Tables 2 to 5 (that is, the bandwidths to be targeted in Tables 2 to 5) SRS bandwidth (m _{SRS, b} ) as bandwidth configuration parameter information determined by the transmission information control unit 120 of the base station apparatus 100). The processing procedure of the transmission information control unit 120 of the base station apparatus 100 when there are 16 resource blocks and the SRS frequency hopping calculation parameter (N _b ) is 2 is as follows. That is, with respect to Table 2, the entry having such bandwidth configuration parameter information is only when the bandwidth level is b = 1 and the bandwidth index is 1. Therefore, the transmission information control unit 120 of the base station apparatus 100 sets the bandwidth portion corresponding to this table by the bandwidth level and the bandwidth index. Regarding Table 3, the entry having such bandwidth configuration parameter information is only when the bandwidth level is b = 1 and the bandwidth index is 4. Therefore, the transmission information control unit 120 of the base station apparatus 100 sets the bandwidth portion corresponding to this table by the bandwidth level and the bandwidth index. Regarding Table 4, there are a plurality of entries having such bandwidth configuration parameter information, and the entry with the larger bandwidth index among those entries has a bandwidth level of b = 1 and a bandwidth. This is a case where the index is 7. Therefore, the transmission information control unit 120 of the base station apparatus 100 sets the bandwidth portion corresponding to this table by the bandwidth level and the bandwidth index. Regarding Table 5, there are a plurality of entries having such bandwidth configuration parameter information, and the entry with the larger bandwidth index among these entries has a bandwidth level of b = 2 and a bandwidth. This is the case where the index is 4. Therefore, the transmission information control unit 120 of the base station apparatus 100 sets the bandwidth portion corresponding to this table by the bandwidth level and the bandwidth index.

  Then, in step s404, transmission information control section 120 of base station apparatus 100 selects one of frequency hopping options 1 to 3.

In L401, the base station apparatus 100 uses the resource allocation information (here, the bandwidth configuration parameter information common to each bandwidth part) and the frequency hopping option information selected above as the mobile station. It transmits to the apparatus 200.
In response to this, the mobile station device 200 sets a table identification number corresponding to each bandwidth portion based on the bandwidth of each bandwidth portion in step s405. Then, mobile station apparatus 200 sets the bandwidth level and bandwidth index of each bandwidth portion based on the received resource allocation information in step s406. That is, based on the received resource allocation information (here, one type of bandwidth configuration parameter information), the mobile station apparatus converts the SRS configuration for each bandwidth portion by the same processing procedure as the operation on the base station apparatus 100 side. Set autonomously (sets the bandwidth index and bandwidth level for each bandwidth portion).

In step s407, the mobile station apparatus 200 generates an SRS for each bandwidth portion based on the above information.
And in L402, the mobile station apparatus 200 transmits SRS with respect to the base station apparatus 100. FIG.
Note that the frequency hopping in this embodiment (Modification 1) is the same as that described in the first embodiment.

<Third Embodiment Modification 2>
In the second modification of the present embodiment, the transmission information control unit 120 of the base station apparatus selects a bandwidth portion having the minimum bandwidth from among the plurality of bandwidth portions as the reference bandwidth portion, and the reference bandwidth portion The bandwidth for reference signal is allocated to the reference bandwidth, and the bandwidth configuration parameter information used for the allocation of the bandwidth for reference signal is applied to the other bandwidth portions of the plurality of bandwidth portions. Thus, the reference signal band is assigned to the other bandwidth portion.
Further, the reference signal control unit 120 of the mobile station apparatus applies the bandwidth configuration parameter information based on the resource allocation information received by the receiving unit 250 to each of the plurality of bandwidth portions, thereby referring to each bandwidth portion. Allocate signal bandwidth.

FIG. 15 is a sequence diagram illustrating a detailed procedure of processing in the second modification of the present embodiment. Hereinafter, it demonstrates along this figure.
In step s501, the base station apparatus 100 selects a bandwidth part to which SRS can be allocated. Next, in step s502, the base station apparatus 100 selects a bandwidth portion having the minimum bandwidth (BW) as a reference bandwidth portion from the bandwidth portions selected in step s501. In step s503, the base station apparatus 100 appropriately sets a bandwidth index for the reference bandwidth portion selected in step s502. In step s504, the base station apparatus 100 sets a bandwidth level for the reference bandwidth portion. Subsequently, the base station apparatus 100 sets the SRS bandwidth for the other bandwidth portions based on the table identification number corresponding to the reference bandwidth portion and the bandwidth level and bandwidth index set in steps s503 and s504, respectively. Set. That is, the bandwidth configuration parameter information specified by the table identification number, the bandwidth level, and the bandwidth index is applied. That is, the same bandwidth configuration parameter information as the bandwidth configuration parameter information applied to the reference bandwidth portion is also applied to all other bandwidth portions.

A specific method for setting the SRS bandwidth to each bandwidth portion is as follows. In the setting of the SRS band in the second modification of the present embodiment, the resource allocation information common to the bandwidth part is a table identification number (bandwidth division information), a bandwidth level, and a bandwidth index.
The transmission information control unit 120 of the base station apparatus 100 appropriately determines the bandwidth level and the bandwidth index for the reference bandwidth portion, and searches the SRS bandwidth configuration table corresponding to this reference bandwidth portion, thereby Bandwidth configuration parameter information corresponding to the bandwidth level and the bandwidth index is obtained and applied to the reference bandwidth portion. At this time, the table identification number is uniquely determined according to the bandwidth of the reference bandwidth portion.
Based on the table identification number, bandwidth level, and bandwidth index determined for the reference bandwidth part above, the transmission information control unit 120 of the base station apparatus 100 determines the bandwidth configuration parameter information corresponding to the other information. This also applies to all bandwidth parts.
This will be described using a specific example. When the bandwidth of the reference bandwidth portion is 64 resource blocks, the SRS bandwidth configuration table corresponding to this reference bandwidth portion is Table 4, and the table identification number is also uniquely determined. When the bandwidth level determined by the transmission information control unit 120 of the base station apparatus 100 is b = 0 and the bandwidth index is 5, as the bandwidth configuration parameter information, the SRS bandwidth (m _{SRS, b} ) is 40. It is a resource block and the SRS frequency hopping calculation parameter (N _b ) is 1. The transmission information control unit 120 of the base station device 100 uses the table identification number, the bandwidth level, and the bandwidth index as the SRS bandwidth (m _{SRS, b} ) for all target bandwidth portions. 40 resource blocks are applied, and 1 is applied as the SRS frequency hopping calculation parameter (N _b ). That is, in the second modification of the present embodiment, common bandwidth configuration parameter information (SRS bandwidth and SRS frequency hopping calculation parameters) is applied to all bandwidth portions.

In step s505, the transmission information control unit 120 of the base station apparatus 100 selects any one of the frequency hopping options 1 to 3. Note that the frequency hopping options 1 to 3 in the present embodiment (Modification 2) are the same as those described in the first embodiment.
In step s506, the base station apparatus 100 sets frequency hopping frequency position shift information according to the bandwidth of the bandwidth portion. The frequency position shift information represents a result of the base station apparatus 100 determining whether or not to perform frequency position shift, and represents a value indicating either “shift” or “not shift”. Take. When the shift is indicated by the frequency position shift information, the frequency range in which frequency hopping is performed is sequentially shifted within a certain bandwidth portion. For example, the bandwidth portion selected in s502 (the bandwidth portion having the minimum bandwidth) was 11.520 MHz (64 resource blocks), and the bandwidths of the other bandwidth portions were 23.040 MHz, respectively. In this case, the frequency hopping range is only within 11.520 MHz, which is the bandwidth of the bandwidth portion having the minimum bandwidth. Here, the frequency position shift information is set in order to transmit the SRS covering the entire band even for the bandwidth portion having a bandwidth of 23.040 MHz, for example. That is, by setting the frequency position shift information, the frequency position is shifted by 11.520 MHz when frequency hopping within a specific 11.520 MHz range in the bandwidth portion having a bandwidth of 23.040 MHz is completed. Then, the next frequency hopping is performed within the shifted 11.520 MHz band. In this way, by repeating the shift of the frequency position as many times as necessary, it is possible to cover the entire bandwidth of the bandwidth portion having a large bandwidth.
In the second modification of the present embodiment, the SRS bandwidth for the reference bandwidth portion may be applied even to the bandwidth portion having a large bandwidth. Even in such a case, the frequency shift described here is performed. By doing so, it becomes possible to transmit the SRS signal from the mobile station device 200 to the base station device 100 while covering the entire bandwidth of the bandwidth portion having a large bandwidth.

  Then, in L501, the base station apparatus 100, the resource allocation information (here, table identification number, bandwidth level, bandwidth index), the frequency position shift information set above, and the frequency hopping selected above. Optional information is transmitted to the mobile station apparatus 200.

Receiving this, the mobile station apparatus 200 sets a table identification number of the reference bandwidth portion based on the bandwidth of the reference bandwidth portion in step s507. In step s508, based on the resource allocation information received from the base station apparatus side, the mobile station apparatus 200, for each bandwidth part, the same table identification number as the reference bandwidth part, the bandwidth index, and the bandwidth Apply levels and. That is, based on the resource allocation information, the mobile station apparatus autonomously sets the SRS configuration for each bandwidth part. At this time, mobile station apparatus 200 also executes control for performing frequency position shift described below. In step s509, the mobile station apparatus 200 generates an SRS for each bandwidth portion based on the above information.
Then, in L502, the mobile station apparatus 200 transmits an SRS to the base station apparatus 100.

  As a further modification of the second modification of the present embodiment, instead of using the table identification number, the bandwidth level, and the bandwidth index set as resource allocation information common to each bandwidth portion, a bandwidth configuration is used. The parameter information itself may be used, and in this case also, the bandwidth configuration parameter information (SRS bandwidth and SRS frequency hopping calculation parameters) common to both the base station apparatus 100 side and the mobile station apparatus 200 side is all. It will be applied to the bandwidth part.

  FIG. 16 is a schematic diagram showing a specific example of the frequency position shift described above. In the figure, the vertical axis represents time, and the horizontal axis represents frequency. A region indicated by hatching is a region for SRS. The reference signal control unit shifts the frequency range for frequency hopping within the bandwidth portion based on the frequency position shift information received by the receiving unit. As shown in FIG. 5A, there are BP1 having a bandwidth of 11.520 MHz and BP2 having a bandwidth of 23.040 MHz. For BP1, frequency hopping covers the entire band indicated by symbol A and is used for SRS transmission. On the other hand, for the BP2, in the method of the modification 2, the band indicated by the symbol B is initially covered by frequency hopping, but the band indicated by the symbol C is initially outside the frequency hopping range. Not used. Then, after a predetermined number of frequency hopping is performed (in the example shown, after three cycles have elapsed), the frequency position of BP2 is shifted as shown in FIG. Then, frequency hopping is performed so as to cover the band indicated by the symbol C. Therefore, not only BP1 but also all bands that can be assigned SRS in BP2 are covered when viewed through a predetermined time.

<Third Embodiment Modification 3>
In the third modification of the present embodiment, the transmission information control unit 120 of the base station apparatus allocates a reference signal band by applying the common bandwidth configuration parameter information to each of a plurality of bandwidth portions. Do.
Further, the reference signal control unit 230 of the mobile station apparatus uses the bandwidth configuration information received by the allocation information receiving unit, the bandwidth index, and the bandwidth level from the bandwidth configuration table storage unit. For the bandwidth part corresponding to the bandwidth configuration parameter information by searching the bandwidth configuration table storage unit in association with the bandwidth classification information corresponding to each bandwidth part. A bandwidth index and a bandwidth level are specified, and a reference signal band is assigned to the bandwidth portion using the specified bandwidth index and bandwidth level.

FIG. 17 is a sequence diagram illustrating a detailed procedure of processing in the third modification of the present embodiment. Hereinafter, it demonstrates along this figure.
In step s601, the base station apparatus 100 selects a bandwidth portion to which SRS can be allocated. Next, in step s602, the base station apparatus 100 selects a bandwidth portion having the minimum bandwidth as a reference bandwidth portion from the plurality of bandwidth portions selected in s601. In steps s603 and s604, base station apparatus 100 sets a predetermined bandwidth index and a bandwidth level for the reference bandwidth portion.

Then, base station apparatus 100 sets a bandwidth index and a bandwidth level for each bandwidth portion other than the reference bandwidth portion. In the setting of the SRS band in the third modification of the present embodiment, the resource allocation information common to the bandwidth part is a table identification number, a bandwidth index, and a bandwidth level.
The transmission information control unit 120 of the base station apparatus 100 appropriately sets the SRS band for the reference bandwidth portion. Thereby, a table identification number corresponding to the bandwidth of the reference bandwidth portion, a bandwidth index and a bandwidth level corresponding to the setting of the SRS band are determined.
The transmission information control unit 120 of the base station apparatus 100 sets the SRS bandwidth according to the following procedure for the bandwidth portion other than the reference bandwidth portion. That is, the transmission information control unit 120 uses the bandwidth configuration parameter information specified from the table identification number, the bandwidth index, and the bandwidth level determined for the reference bandwidth portion above. The transmission information control unit 120 searches the SRS bandwidth configuration table corresponding to each bandwidth part, so that an entry of such bandwidth configuration parameter information indicates which bandwidth index and bandwidth in the table. Find out if it exists at the level position. At this time, when there are a plurality of entries having the same value, for example, when the bandwidth configuration parameter information having the largest bandwidth level is selected and there are still a plurality of corresponding bandwidth configuration parameter information. The bandwidth configuration parameter information having the smallest bandwidth index is selected. Then, setting is performed based on the bandwidth index and the bandwidth level thus obtained.
This will be described with a specific example. When the bandwidth of the reference bandwidth portion is 64 resource blocks, the SRS bandwidth configuration table corresponding to this reference bandwidth portion is Table 4, and the table identification number corresponding to this table is determined. Then, regarding this reference bandwidth portion, when the bandwidth level is b = 3 and the bandwidth index is 6, according to the table, as the bandwidth configuration parameter information, the SRS bandwidth (m _{SRS, b} ) Are 4 resource blocks, and the SRS frequency hopping calculation parameter (N _b ) is 1.
After setting the SRS bandwidth for the reference bandwidth portion, the SRS bandwidth is set for the other bandwidth portions. First, bandwidth configuration parameter information is obtained from the table identification number, bandwidth level, and bandwidth index. When the bandwidth of the other bandwidth portion is 110 resource blocks, the SRS bandwidth configuration table corresponding to this bandwidth portion is shown in Table 5. Then, the transmission information control unit 120 searches Table 5, and the same value as the bandwidth configuration parameter information for the reference bandwidth portion (that is, the SRS bandwidth (m _{SRS, b} ) is 4 resource blocks, and the SRS frequency The position where the hopping calculation parameter (N _b ) is 1) is searched. Then, it can be found that such an entry exists in the table at a position where the bandwidth level is b = 3 and the bandwidth index is 5. The transmission information control unit 120 sets the SRS bandwidth for the bandwidth portion using these bandwidth levels and bandwidth indexes.

In step s605, the transmission information control unit 120 of the base station apparatus 100 selects any one of the frequency hopping options 1 to 3.
Then, in L601, the base station apparatus 100 uses the resource allocation information (here, the table identification number, the bandwidth index, and the bandwidth level) and the frequency hopping information selected in step s605 as the mobile station apparatus. 200 is transmitted.

In response to this, the mobile station apparatus 200 sets a table identification number of the reference bandwidth portion based on the bandwidth of the reference bandwidth portion in step s606. Then, based on the received resource allocation information, the mobile station device 200 sets the bandwidth index and bandwidth level of the reference bandwidth portion, and sets the bandwidth of the reference bandwidth portion in step s607. Get configuration parameters.
In step s608, the mobile station apparatus 200 sets each table identification number based on the bandwidth of the bandwidth portion other than the reference bandwidth portion.
In step s609, the mobile station device 200 searches the table for a parameter that matches the bandwidth configuration parameter of the reference bandwidth portion for each bandwidth portion. Specifically, the mobile station device 200 reads the bandwidth configuration parameter information at the position of the bandwidth index and the bandwidth level from the SRS bandwidth configuration table indicated by the table identification number. Then, an entry having the same value as the bandwidth configuration parameter information is searched in the SRS bandwidth configuration table corresponding to each bandwidth portion, and the bandwidth level and the bandwidth index are specified. Since the detailed procedure of this process is the same as the procedure described as the process on the base station apparatus 100 side, the detailed description is omitted here.
In step s610, the mobile station apparatus 200 sets the bandwidth index and the bandwidth level for each bandwidth portion other than the reference bandwidth portion.

In step s611, the mobile station apparatus 200 generates an SRS for each bandwidth portion based on the above information.
And the mobile station apparatus 200 transmits SRS with respect to the base station apparatus 100 by L602.
Note that the frequency hopping in this embodiment (Modification 3) is the same as that described in the first embodiment.

The SRS configuration is set up to a bandwidth of 20 MHz. In the system assumed from the first embodiment to the third embodiment described above, at least one of the plurality of bandwidth portions has a predetermined upper limit (for example, 20 MHz) or less. Therefore, an SRS configuration compatible with EUTRA's SRS configuration can be set in such a bandwidth portion.
However, in practice, a system in which all bandwidth portions have a bandwidth wider than the predetermined upper limit is also assumed. Embodiments considering such a system will be described in the fourth and subsequent embodiments.

<Fourth Embodiment>
Next, a fourth embodiment of the present invention will be described. Since the functional configuration of the device in the fourth embodiment is the same as that shown in the first embodiment, the description thereof is omitted here.

  In the present embodiment, in the frequency band that can be allocated by the SRS, the SRS that can be handled even when the bandwidth of all the bandwidth portions has a wider bandwidth than the bandwidth for which the SRS configuration is set. Provide resource allocation methods.

FIG. 18 is a flowchart showing a procedure of SRS mapping in the present embodiment. Hereinafter, it demonstrates along this procedure.
First, in step s1001, the base station apparatus 100 determines whether or not there is a bandwidth part capable of SRS resource allocation such that the bandwidth is equal to or less than the maximum uplink transmission frequency bandwidth (MaxBW). If such a bandwidth portion exists (s1001: YES), the process proceeds to step s1002. When such a bandwidth portion does not exist (s1001: NO, that is, when all the bandwidth portions to which SRS resources can be allocated exceed MaxBW), the process proceeds to step s1003.

  In step s1002, since there is a bandwidth portion whose bandwidth is equal to or less than the maximum uplink transmission frequency bandwidth (MaxBW), the first, second, and third are selected by selecting such bandwidth portion. , SRS resource allocation is performed using any of the sixth and seventh embodiments.

  In step s1003, the base station apparatus 100 selects one or all of the bandwidth portions in which SRS resource allocation is possible. The bandwidth portion selected here is a bandwidth portion to which the division method described below is applied. In step s1004, base station apparatus 1000 appropriately sets the bandwidth of the virtual bandwidth portion. At this time, the bandwidth of the virtual bandwidth portion is set to be equal to or less than MaxBW. In step s1005, the bandwidth of the bandwidth portion (one bandwidth portion or all bandwidth portions) selected in step s1003 is divided using the bandwidth of the virtual bandwidth portion described above, and the bandwidth portion Find the remaining bandwidth. The remaining bandwidth is obtained by subtracting the bandwidth of the virtual bandwidth portion from the bandwidth before division. Thus, the bandwidth portion is divided into a bandwidth portion having the bandwidth of the virtual bandwidth portion and a bandwidth portion having the remaining bandwidth.

In step s1006, it is determined whether or not the remaining bandwidth obtained in step s1005 is equal to or less than the MaxBW. When the remaining bandwidth is equal to or less than MaxBW (step s1006: YES), the process proceeds to step s1002 (that is, by selecting the virtual bandwidth portion obtained by the above division as a target, the SRS Resource allocation). If the remaining bandwidth exceeds MaxBW, the process returns to step s1005.
As described above, by repeating steps s1005 and s1006, the bandwidth portion selected in step s1003 is divided into a plurality of virtual bandwidth portions having a bandwidth equal to or less than MaxBW.

  FIG. 19 is a schematic diagram illustrating a specific example of division. In this example, the frequency bandwidth of the bandwidth portion selected in step s1003 as the bandwidth portion to which SRS can be allocated is 50 MHz. Further, the bandwidth (MaxBW) of the reference bandwidth portion is set to 20 MHz. FIG. 5A shows a bandwidth portion before division (bandwidth is 50 MHz). FIG. 5B shows a state in which a virtual bandwidth portion having a bandwidth of 20 MHz (= MaxBW) is divided from the bandwidth portion, and the remaining bandwidth is 30 MHz and exceeds MaxBW. FIG. 6C shows a state where the remaining bandwidth is further divided, and as a result, is divided into three virtual bandwidth portions having bandwidths of 20 MHz, 20 MHz, and 10 MHz, respectively.

Then, the base station apparatus 100 transmits the SRS mapping information obtained by the above procedure and information on the selected frequency hopping option to the mobile station apparatus 200 together with transmission data and control data. The frequency hopping method may be notified using a broadcast information channel, and the frequency hopping method may be uniquely determined by the system.
In response to this, the mobile station apparatus 200 sets the SRS configuration based on the SRS mapping information transmitted from the base station apparatus 100. That is, the mobile station apparatus autonomously sets the SRS configuration for each remaining frequency bandwidth based on the configuration of the designated frequency band among the plurality of allocated bandwidth portions.

  The present embodiment is applicable not only when transmitting a SRS by dividing a frequency band into a plurality of bandwidth parts, but also when operating as a single wide band system by using a plurality of discontinuous frequency bands in combination. it can.

<Fifth Embodiment>
Next, a fifth embodiment of the present invention will be described. Since the functional configuration of the device in the fifth embodiment is the same as that shown in the first embodiment, the description thereof is omitted here.

  This embodiment is different from the fourth embodiment described above in that the bandwidth of the virtual bandwidth portion is obtained by multiplying the bandwidth portion having a large bandwidth by a predetermined number less than 1 (for example, 0.5). Is calculated and a virtual bandwidth portion having a bandwidth equal to or lower than MaxBW (20 MHz in the case of EUTRA) is created. That is, a bandwidth portion having a bandwidth exceeding the maximum uplink transmission frequency bandwidth is sequentially and equally divided by a predetermined integer of 2 or more.

FIG. 20 is a flowchart illustrating a procedure of an SRS mapping method according to the fifth embodiment. Hereinafter, it demonstrates along this procedure.
First, in step s1101, the base station apparatus 100 determines whether or not there is a bandwidth part capable of SRS resource allocation such that the bandwidth is equal to or less than the maximum uplink transmission frequency bandwidth (MaxBW). If such a bandwidth portion exists (s1101: YES), the process proceeds to step s1102. If such a bandwidth portion does not exist (s1101: NO), the process proceeds to step s1103.

  In step s1102, since there is a bandwidth portion whose bandwidth is equal to or less than MaxBW, the first, second, third, sixth, and seventh embodiments are selected by selecting such a bandwidth portion. The resource allocation of SRS is performed using either of the above.

In step s1103, the base station apparatus 100 selects one or all of the bandwidth portions in which SRS resource allocation is possible. The bandwidth portion selected here is a bandwidth portion to which the division method described below is applied. In step s1104, base station apparatus 1000 sets a predetermined number of divisions. Here, the division number is an integer of 2 or more that is appropriately selected. In step s1105, the bandwidth portion is divided in the form of equally dividing the bandwidth of one bandwidth portion (one bandwidth portion or all bandwidth portions) selected in step s1103 by the number of divisions set in step s1104. To do. When this division is completed, the process returns to step s1101.
Even when the initial bandwidth of the bandwidth portion where SRS resource allocation is possible is wider than MaxBW, the bandwidth portion is obtained by repeating the loop including steps s1101, s1103, s1104, and s1105 according to the above procedure. Is divided into a plurality of bandwidth portions having a bandwidth equal to or less than MaxBW.
Note that although the number of divisions set in step s1104 is an integer of 2 or more, the number of divisions is selected so that the bandwidth does not become less than the minimum uplink frequency bandwidth due to the division. That is, the number of divisions is selected such that (bandwidth of bandwidth part before division) / number of divisions ≧ (minimum uplink frequency bandwidth).

  FIG. 21 is a schematic diagram illustrating a specific example of division according to the present embodiment. In this example, there are two bandwidth portions selected in step s1103 as bandwidth portions to which SRS can be allocated, the bandwidth of BP1 is 50 MHz, and the bandwidth of BP2 is 30 MHz. Further, the bandwidth (MaxBW) of the reference bandwidth portion is set to 20 MHz. FIG. 4A shows BP1 and BP2 before division. FIG. 2B shows a state where BP1 and BP2 are divided by a division number of 2, respectively. The width of each band obtained by dividing BP1 into two is 25 MHz, and this bandwidth still exceeds MaxBW. Each of the bandwidths obtained by dividing BP2 into two is 15 MHz, which is equal to or less than MaxBW, and is used as virtual BPs 21 and 22 without further division. FIG. 6C shows a state in which only the BP1 side is further divided by the division number 2 from the state of FIG. As a result of this division, BP1 having a bandwidth of 50 MHz is divided into four bands each having a bandwidth of 12.5 MHz, and these are used as virtual BPs 11 to 14 because (≦ MaxBW or less. be able to.

Then, the base station apparatus 100 transmits the SRS mapping information obtained by the above procedure and information on the selected frequency hopping option to the mobile station apparatus 200 together with transmission data and control data. The frequency hopping method may be notified using a broadcast information channel, and the frequency hopping method may be uniquely determined by the system.
In response to this, the mobile station apparatus 200 sets the SRS configuration based on the SRS mapping information transmitted from the base station apparatus 100. That is, the mobile station apparatus autonomously sets the SRS configuration for each remaining frequency bandwidth based on the configuration of the designated frequency band among the plurality of allocated bandwidth portions.

  The present embodiment is applicable not only when transmitting a SRS by dividing a frequency band into a plurality of bandwidth parts, but also when operating as a single wide band system by using a plurality of discontinuous frequency bands in combination. it can.

<Sixth Embodiment>
Next, a sixth embodiment of the present invention will be described. Since the functional configuration of the device in the sixth embodiment is the same as that shown in the first embodiment, the description thereof is omitted here.

  In the present embodiment, by setting a virtual bandwidth portion having a predetermined bandwidth in the base station apparatus 100, the bandwidth can also be applied to other bandwidth portions as in the first or second embodiment. The ratio can be determined, and common SRS configuration information can be applied to a plurality of bandwidth portions.

FIG. 22 is a sequence diagram illustrating a detailed procedure of processing in the sixth embodiment. Hereinafter, it demonstrates along this procedure.
First, in step s1201, the base station apparatus 100 selects a bandwidth portion to which SRS can be allocated. Next, in step s1202, the base station apparatus 100 sets the bandwidth of the virtual bandwidth portion. The bandwidth of the virtual bandwidth portion set at this time does not exceed the upper limit of the bandwidth for which the SRS configuration is set. In steps s1203 and s1204, base station apparatus 100 appropriately sets a predetermined SRS bandwidth for the virtual bandwidth portion set in step s1202. Specifically, the SRS bandwidth configuration table corresponding to the bandwidth of the virtual bandwidth portion is specified, the bandwidth index and the bandwidth level are appropriately specified, and the corresponding SRS configuration parameter information is used. Set up.
In step s1205, the base station apparatus 100 calculates a bandwidth ratio between the virtual bandwidth part set in step s1202 and the SRS band in the virtual bandwidth part. Then, using this bandwidth ratio, base station apparatus 100 sets the SRS band for the bandwidth part other than the virtual bandwidth part in the same procedure as the processing procedure described in the first embodiment. .
In step s1206, the transmission information control unit 120 of the base station apparatus 100 selects any one of the frequency hopping options 1 to 3.

In L1201, the base station apparatus 100 determines the resource allocation information (here, the bandwidth ratio, the bandwidth index and the bandwidth level related to the virtual bandwidth portion), and the frequency hopping option selected in step s1205. Is transmitted to the mobile station apparatus 200. At this time, the base station apparatus 100 also transmits setting information such as a bandwidth related to the virtual bandwidth portion to the mobile station apparatus 200 as necessary.
In response to this, the mobile station apparatus 200 sets a table identification number of the virtual bandwidth portion from the bandwidth of the virtual bandwidth portion in step s1207 based on the received resource allocation information and the like. In step s1208, the mobile station apparatus 200 sets the same table identification number, bandwidth index, and bandwidth level as the virtual bandwidth portion for each selected bandwidth portion. In step s1209, the mobile station apparatus 200 sets the SRS bandwidth of each selected bandwidth portion based on the bandwidth and bandwidth ratio of the selected bandwidth portion. That is, the mobile station apparatus 200 sets the SRS bandwidth of the selected bandwidth portion based on the bandwidth of the selected bandwidth portion and the bandwidth ratio of the reference bandwidth portion. Here, the mobile station device 200 sets the SRS bandwidth of each bandwidth portion by the same procedure as the SRS bandwidth setting of each bandwidth portion on the base station device 100 side described above.
In step s1210, the mobile station apparatus 200 generates an SRS for each selected bandwidth portion based on the above information.
Then, in L1202, the mobile station device 200 transmits an SRS to the base station device 100.
The frequency hopping in this embodiment is the same as that described in the first embodiment.

<Seventh Embodiment>
Next, a seventh embodiment of the present invention will be described. Since the functional configuration of the device in the seventh embodiment is the same as that shown in the first embodiment, the description thereof is omitted here.

  In the present embodiment, the bandwidth portion having the minimum bandwidth is selected as the reference bandwidth portion. Then, the base station apparatus 100 transmits the bandwidth index of the reference bandwidth portion, the bandwidth level, and the bandwidth ratio to the mobile station apparatus.

  FIG. 23 is a sequence diagram illustrating a detailed procedure of processing according to the seventh embodiment. Hereinafter, it demonstrates along this procedure.

  First, in step s1301, the base station apparatus 100 selects a bandwidth portion to which SRS can be allocated. Next, in step s1302, the base station apparatus 100 selects a bandwidth portion having a minimum bandwidth from the bandwidth portions selected above as a reference bandwidth portion. In step s1303, the base station apparatus 100 sets a bandwidth index in the reference bandwidth portion. In step s1304, base station apparatus 100 sets a bandwidth level in the reference bandwidth portion. In step s1305, the base station apparatus 100 obtains a bandwidth ratio between the bandwidth of the reference bandwidth portion and the width of the SRS bandwidth in the reference bandwidth portion. In step s1306, the base station apparatus 100 selects any one of the frequency hopping options 1 to 3.

  Then, in L1301, the base station apparatus 100 transmits the resource allocation information (here, the bandwidth index and the bandwidth level of the reference bandwidth portion, the bandwidth ratio obtained above, and the frequency hopping information) to the mobile station apparatus. 200 is transmitted.

In response to this, the mobile station apparatus 200 sets a table identification number for each bandwidth portion from the bandwidth of the selected bandwidth portion in step s1307 based on the received resource allocation information and the like. In step s1308, the mobile station apparatus 200 determines, for each bandwidth part other than the reference bandwidth part, from the bandwidth of the bandwidth part and the received bandwidth ratio (bandwidth ratio of the reference bandwidth part). The SRS bandwidth of the bandwidth part is calculated. In step s1309, the mobile station apparatus 200 sets the bandwidth index and bandwidth level of each bandwidth portion from the SRS bandwidth calculated above. And mobile station apparatus 200 produces | generates SRS of the selected bandwidth part based on the information set above by step s1310.
And in L1302, the mobile station apparatus 200 transmits SRS with respect to the base station apparatus 100. FIG.
The frequency hopping in this embodiment is the same as that described in the first embodiment.

This will be described with a specific example. The bandwidth of the reference bandwidth portion is 20 resource blocks (that is, at this time, Table 2 is selected and the corresponding table identification number is determined), and the bandwidth is set in the setting of the SRS bandwidth of the reference bandwidth portion. When the level is b = 3 and the bandwidth index is 0, the SRS bandwidth (m _{SRS, b} ) in the corresponding bandwidth configuration parameter information is 4 resource blocks. That is, the ratio of the SRS bandwidth to the entire bandwidth of the reference bandwidth portion is “0.2” (= 4/20). At this time, when the bandwidth of a certain bandwidth portion other than the reference bandwidth portion is 60 resource blocks (that is, the SRS bandwidth configuration table corresponding to this bandwidth portion is Table 3), the above bandwidth Using the width ratio (“0.2”), the SRS bandwidth of this bandwidth portion is calculated as 12 (= 60 * 0.2). In Table 3, since there are a plurality of entries having an SRS bandwidth (m _{SRS, b} ) of 12, the bandwidth level is set to b = 2 as the one corresponding to the entry with the highest bandwidth level. , The bandwidth index is set to zero.

  In addition, you may make it implement | achieve a part of function of the base station apparatus and mobile station apparatus 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 by a computer system and executed. The “computer system” here 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. Further, the “computer-readable recording medium” dynamically holds a program for a short time, like a communication line when transmitting a program via a network such as the Internet or a communication line such as a telephone line. In this case, a volatile memory in a computer system that serves as a server or a client in that case may also be included that holds a program for a certain time. 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.

  The present invention is applicable to any communication system such as a single carrier communication system, a multicarrier communication system, a single carrier / multicarrier composite communication system, and a subcarrier communication system. In addition, the present invention can be applied to a single carrier scheme capable of concentrated arrangement and distributed arrangement such as DFT-S-OFDM.

  Further, the present invention can be applied to a plurality of frequency bands. The plurality of frequency bands described here are a single carrier, that is, a frequency band obtained by dividing one continuous frequency band into a plurality of frequency bands, and a frequency band using a plurality of discontinuous frequency bands.

  Further, the present invention is proposed by EUTRA and Advanced EUTRA, such as user (mobile station apparatus) division multiplexing, code division multiplexing (CDM), frequency division multiplexing (FDM), spectrum division multiplexing, etc. Multiplexing methods that are used can be applied.

  The third embodiment can cope with a case where a mobile station device for EUTRA is included in a cell covered by a base station device. Among a plurality of bandwidth portions, one or a plurality of bandwidth portions can be allocated to the EUTRA mobile station apparatus depending on the situation.

(Specific example 1)
For example, when the SRS is transmitted to the base station apparatus using the three frequency bands A0, A1, and A2, when configuration information is notified to A1, the other frequency bands A0 and A2 are transmitted. Also, the same SRS configuration information as the SRS configuration information notified to A1 is automatically notified.

(Specific example 2)
When SRS configuration information is set for each bandwidth portion, the amount of signaling used for SRS is amplified as the bandwidth portion increases. In addition, an increase in signaling amount is assumed in proportion to an increase in the number of configuration information setting items. For example, when transmitting SRS using two bandwidth parts, if the number of setting items is 5, conventionally, setting information is set for each bandwidth part. A total of 13 pieces of information, that is, the number of setting items 5 × 2 = 10, two pieces of transmission frequency information in the bandwidth portion, and one piece of information that repeatedly uses the setting items must be transmitted to the mobile station apparatus. In the present invention, if information on the number of setting items is reused between each bandwidth portion, a total of seven pieces of information including five setting items and two pieces of bandwidth frequency transmission frequency information are transmitted to the mobile station apparatus. Since it is good, it seems that the amount of signaling can be reduced. If there are three bandwidth portions, the conventional technology transmits 5 × 3 (number of setting items) +3 (number of transmission frequency information in the bandwidth portion) = 18 information, whereas in the present invention, 5 (the number of setting items) +3 (the number of transmission frequency information in the bandwidth portion) + 1 × 2 (the parameter is used other than the selected bandwidth portion, so the total number of bandwidth portions−1) = 10 pieces of information Therefore, it is possible to allocate SRS with a smaller amount of signaling as the number of bandwidth portions to which SRS is allocated increases.

  In the above-described embodiment, the configuration and operation of the base station device have been described. However, a relay station device having the same configuration and function may be used instead of the base station device.

  Moreover, although the above-mentioned embodiment demonstrated the mobile communication system comprised including a base station apparatus and a mobile station apparatus, it is also possible to apply this invention to a fixed radio | wireless communications system. In this case, a system is configured by a fixed wireless device having the same function as the above-described base station device and a fixed wireless device having the same function as the above-described mobile station device.

  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 of the present invention are also within the scope of the claims. include.

100 Base station device (first communication device)
Reference Signs List 101 Data control unit 102 Modulation coding unit 103 Mapping unit 104 Frequency hopping unit 105 Inverse fast Fourier transform (IFFT) unit 106 Wireless transmission unit 107 Wireless reception unit 108 Fast Fourier transform (FFT) unit 109 Demodulation decoding unit 110 Data extraction unit 111 Antenna 112 Mapping control unit 113 Frequency hopping control unit 114 Transmission frequency control unit 120 Transmission information control unit 130 Transmission unit (assignment information transmission unit, first transmission unit)
140 Receiver (reference signal receiver, first receiver)
160 Bandwidth Configuration Table Storage Unit 200 Mobile Station Device (Second Communication Device)
201 Data Control Unit 202 Modulation Coding Unit 203 Mapping Unit 204 Frequency Hopping Unit 205 Inverse Fast Fourier Transform (IFFT) Unit 206 Radio Transmission Unit 207 Radio Reception Unit 208 Fast Fourier Transform (FFT) Unit 209 Demodulation Decoding Unit 210 Data Extraction Unit 211 antenna 212 reception quality information generation unit 213 reception quality measurement unit 214 reference signal generation unit 215 reference signal multiplexing unit 220 reception quality information control unit 230 reference signal control unit 240 transmission unit (reference signal transmission unit, second transmission unit)
250 receiver (assignment information receiver, second receiver)
260 Bandwidth configuration table storage

Claims (24)

A base station apparatus that transmits and receives signals using a plurality of bandwidth portions with a mobile station apparatus,
Bandwidth configuration parameter information, which is a parameter for setting a reference signal band for an uplink reception quality measurement reference signal in the bandwidth part, is classified into the bandwidth size of the bandwidth part. A bandwidth configuration table storage unit that holds the information in association with a combination of bandwidth classification information, bandwidth level, and bandwidth index,
A transmission information control unit for allocating the reference signal band based on resource allocation information common to a plurality of bandwidth portions and bandwidth configuration parameter information stored in the bandwidth configuration table storage unit; ,
A transmission unit for transmitting the resource allocation information to the mobile station device;
A receiving unit for receiving an uplink reception quality measurement reference signal from the mobile station apparatus in the reference signal band allocated by the transmission information control unit;
A base station apparatus comprising: The transmission information control unit selects a bandwidth part having a bandwidth that does not exceed a predetermined maximum uplink transmission frequency bandwidth as a reference bandwidth part from the plurality of bandwidth parts, and A bandwidth ratio that is a ratio of the entire bandwidth and the bandwidth of the reference signal band in the reference bandwidth portion is calculated, and the bandwidths of the plurality of bandwidth portions are calculated based on the calculated bandwidth ratio According to the allocation of the reference signal band in the bandwidth portion,
The transmission unit transmits, as the resource allocation information, the bandwidth ratio and the information on the bandwidth level and the bandwidth index related to the allocation of the reference signal band in the reference bandwidth portion.
The base station apparatus according to claim 1. The transmission information control unit selects, as the reference bandwidth portion, a bandwidth portion having a minimum bandwidth among the plurality of bandwidth portions.
The base station apparatus according to claim 2. The transmission information control unit selects a bandwidth part having a bandwidth exceeding the maximum uplink transmission frequency bandwidth from the plurality of bandwidth parts, and the maximum uplink included in the selected bandwidth part Selecting a portion of the bandwidth not exceeding the link transmission frequency bandwidth as a virtual bandwidth portion, and selecting the selected virtual bandwidth portion as the reference bandwidth portion;
The base station apparatus according to claim 2, wherein: The transmission information control unit selects a bandwidth part having a minimum bandwidth among the plurality of bandwidth parts as a reference bandwidth part, assigns the reference signal band to the reference bandwidth part, By applying the bandwidth level and the bandwidth index relating to the allocation of the reference signal band in the reference bandwidth portion to the other bandwidth portions of the plurality of bandwidth portions, Assigning the reference signal band of
The transmission unit transmits the bandwidth level and the bandwidth index related to allocation of a reference signal band in the reference bandwidth portion as the resource allocation information.
The base station apparatus according to claim 1. The transmission information control unit selects a plurality of bandwidth portions having a bandwidth that does not exceed a predetermined maximum uplink transmission frequency bandwidth, and the bandwidth configuration table is selected for the plurality of bandwidth portions. By applying the common bandwidth configuration parameter information held in the storage unit, the band for the reference signal is assigned for the plurality of bandwidth portions,
The transmission unit transmits the bandwidth configuration parameter information used for allocation of the reference signal band for the plurality of bandwidth portions as the resource allocation information.
The base station apparatus according to claim 1, wherein: The transmission information control unit selects a bandwidth part having a minimum bandwidth among the plurality of bandwidth parts as a reference bandwidth part, assigns the reference signal band to the reference bandwidth part, and By applying the bandwidth configuration parameter information used for allocating the reference signal band for the reference bandwidth portion to the other bandwidth portion of the plurality of bandwidth portions, the other bandwidth Assigning the reference signal band for the part,
The transmission unit, as the resource allocation information,
(A) the bandwidth configuration parameter information used for allocating the reference signal band for the reference bandwidth portion;
(B) a bandwidth index and a bandwidth level used for allocating the reference signal band for the reference bandwidth portion, and bandwidth classification information corresponding to the reference bandwidth portion;
(A) or (b) and frequency position shift information for shifting the frequency range for frequency hopping is also transmitted to the mobile station apparatus.
The base station apparatus according to claim 1. The transmission information control unit, when all the bandwidths of the plurality of bandwidth portions exceed a predetermined maximum uplink transmission frequency bandwidth, at least one of the plurality of bandwidth portions, Dividing into a plurality of bandwidth portions having a bandwidth not exceeding the maximum uplink transmission frequency bandwidth;
The base station apparatus according to claim 1, wherein the base station apparatus is a base station apparatus. The transmission information control unit divides a bandwidth portion having a bandwidth exceeding the maximum uplink transmission frequency bandwidth into predetermined virtual bandwidths not exceeding the maximum uplink transmission frequency bandwidth;
The base station apparatus according to claim 8. The transmission information control unit sequentially divides a bandwidth portion having a bandwidth exceeding the maximum uplink transmission frequency bandwidth by a predetermined integer of 2 or more to thereby reduce the maximum uplink transmission frequency bandwidth. Obtaining multiple bandwidth portions with bandwidths not exceeding,
The base station apparatus according to claim 8. The transmission information control unit sets frequency hopping information of an uplink reception quality measurement reference signal for the plurality of bandwidth portions,
The transmission unit further transmits the frequency hopping information set by the transmission information control unit,
The receiving unit receives the uplink reception quality measurement reference signal from the mobile station device in the reference signal band according to the frequency hopping information;
The base station apparatus according to claim 1, wherein the base station apparatus is a base station apparatus. A mobile station device that transmits and receives signals using a plurality of bandwidth portions with a base station device,
Bandwidth configuration parameter information, which is a parameter for setting a reference signal band for an uplink reception quality measurement reference signal in the bandwidth part, is classified into the bandwidth size of the bandwidth part. A bandwidth configuration table storage unit that holds the information in association with a combination of bandwidth classification information, bandwidth level, and bandwidth index,
A receiving unit that receives resource allocation information common to the plurality of bandwidth portions from the base station apparatus;
Based on the bandwidth configuration parameter information read from the bandwidth configuration table storage unit according to the resource allocation information received by the receiving unit, the reference signal band is allocated for each of a plurality of bandwidth portions. A reference signal control unit that generates a reference signal for uplink reception quality measurement, and
A transmission unit that transmits the uplink reception quality measurement reference signal to a base station device using the reference signal band allocated by the reference signal control unit;
A mobile station apparatus comprising: The reception unit receives information on a bandwidth ratio, a bandwidth level, and a bandwidth index as the resource allocation information,
The reference signal control unit selects a bandwidth portion having a bandwidth that does not exceed a predetermined maximum uplink transmission frequency bandwidth as a reference bandwidth portion from a plurality of bandwidth portions, and corresponds to the reference bandwidth portion The reference bandwidth for the reference bandwidth portion by the bandwidth configuration parameter information read from the bandwidth configuration table storage unit using the bandwidth classification information, the received bandwidth level and the bandwidth index. A bandwidth is allocated, and a bandwidth for a reference signal is allocated to a bandwidth portion other than the reference bandwidth portion according to the bandwidth ratio received and the bandwidth of the bandwidth portion other than the reference bandwidth portion. ,
The mobile station apparatus according to claim 12, wherein: The reference signal control unit selects a bandwidth portion having a minimum bandwidth among the plurality of bandwidth portions as the reference bandwidth portion;
The mobile station apparatus according to claim 13. The reference signal control unit selects a bandwidth portion having a bandwidth exceeding the maximum uplink transmission frequency bandwidth from the plurality of bandwidth portions, and the maximum uplink included in the selected bandwidth portion. Selecting a portion of the bandwidth not exceeding the link transmission frequency bandwidth as a virtual bandwidth portion, and selecting the selected virtual bandwidth portion as the reference bandwidth portion;
The mobile station apparatus according to claim 13. The receiving unit receives a bandwidth level and a bandwidth index as the resource allocation information,
The reference signal control unit selects a bandwidth portion having a minimum bandwidth from the plurality of bandwidth portions as a reference bandwidth portion, and receives the bandwidth classification information corresponding to the reference bandwidth portion and the received A reference signal band is assigned to the reference bandwidth portion according to the bandwidth configuration parameter information read from the bandwidth configuration table storage unit using the bandwidth level and the bandwidth index, and other bands Based on the bandwidth configuration parameter information read from the bandwidth configuration table storage unit using the bandwidth classification information corresponding to each of the bandwidth portions, the received bandwidth level and the bandwidth index, the bandwidth portion Assign a reference signal band for
The mobile station apparatus according to claim 12, wherein: The receiving unit receives bandwidth configuration parameter information as the resource allocation information,
The reference signal control unit selects a plurality of bandwidth portions having a bandwidth that does not exceed a predetermined maximum uplink transmission frequency bandwidth, and receives the received bandwidth for each of the plurality of bandwidth portions. By applying the width configuration parameter information as it is, the bandwidth for the reference signal is allocated for each bandwidth part.
The mobile station apparatus according to claim 12, wherein: The receiving unit, as the resource allocation information,
(A) Bandwidth configuration parameter information,
(B) a combination of bandwidth index, bandwidth level, and bandwidth partition information;
(A) or (b) of
The receiver further receives, from the base station apparatus, frequency position shift information for shifting a frequency range for frequency hopping,
The reference signal controller is
When the receiving unit receives (a), the received bandwidth configuration parameter information is applied to each of a plurality of bandwidth portions, thereby assigning a reference signal band for each bandwidth portion. Do,
When the receiving unit receives (b), the bandwidth read from the bandwidth configuration table storage unit using the received bandwidth index, the bandwidth level, and the bandwidth classification information Assigning a reference signal band for each of the plurality of bandwidth portions according to configuration parameter information;
Further, based on the frequency position shift information received by the receiver, the frequency range for frequency hopping is shifted within the bandwidth portion,
The mobile station apparatus according to claim 12, wherein: The receiving unit receives the frequency hopping information of the uplink reception quality measurement reference signal from the base station apparatus side,
The reference signal control unit sets the frequency hopping information for the plurality of bandwidth portions,
The transmission unit transmits the uplink reception quality measurement reference signal using the reference signal band according to the frequency hopping information;
The mobile station apparatus according to any one of claims 12 to 18, wherein the mobile station apparatus is characterized in that A reference signal transmission method in a wireless communication system that transmits and receives signals using a plurality of bandwidth portions between a base station device and a mobile station device,
Parameters for setting a reference signal band for an uplink reception quality measurement reference signal in the bandwidth portion as bandwidth configuration parameter information common to both the base station apparatus and the mobile station apparatus The base station apparatus associates the bandwidth configuration parameter information with the combination of the bandwidth classification information indicating the bandwidth size classification of the bandwidth portion, the bandwidth level, and the bandwidth index. And in advance in the bandwidth configuration table storage unit of each mobile station device,
In the base station apparatus, the reference signal band is allocated based on the resource allocation information common to the plurality of bandwidth portions and the bandwidth configuration parameter information stored in the bandwidth configuration table storage unit. A transmission information control process to be performed;
In the base station apparatus, an allocation information transmission process for transmitting the resource allocation information to the mobile station apparatus;
In the mobile station apparatus, an allocation information receiving process for receiving resource allocation information common to the plurality of bandwidth portions from the base station apparatus;
In the mobile station apparatus, for each of a plurality of bandwidth portions based on bandwidth configuration parameter information read from the bandwidth configuration table storage unit according to the resource allocation information received in the allocation information reception process A reference signal control process for allocating the reference signal band and generating a reference signal for uplink reception quality measurement;
In the mobile station apparatus, a reference signal transmission process of transmitting the uplink reception quality measurement reference signal to a base station apparatus using the reference signal band allocated in the reference signal control process,
In the base station apparatus, a reference signal reception process for receiving an uplink reception quality measurement reference signal from the mobile station apparatus in the reference signal band allocated in the transmission information control process,
A reference signal transmission method comprising: A wireless communication system that includes a base station device and a mobile station device, and transmits and receives signals using a plurality of bandwidth portions between the base station device and the mobile station device,
The base station device
Bandwidth configuration parameter information, which is a parameter for setting a reference signal band for an uplink reception quality measurement reference signal in the bandwidth part, is classified into the bandwidth size of the bandwidth part. A bandwidth configuration table storage unit that holds the information in association with a combination of bandwidth classification information, bandwidth level, and bandwidth index,
A transmission information control unit for allocating the reference signal band based on resource allocation information common to a plurality of bandwidth portions and bandwidth configuration parameter information stored in the bandwidth configuration table storage unit; ,
An allocation information transmitter for transmitting the resource allocation information to the mobile station device;
A reference signal receiving unit for receiving an uplink reception quality measurement reference signal from the mobile station apparatus in the reference signal band allocated by the transmission information control unit;
Comprising
The mobile station device
Bandwidth configuration parameter information, which is a parameter for setting a reference signal band for an uplink reception quality measurement reference signal in the bandwidth part, is classified into the bandwidth size of the bandwidth part. A bandwidth configuration table storage unit that holds the information in association with a combination of bandwidth classification information, bandwidth level, and bandwidth index,
An allocation information receiving unit that receives resource allocation information common to the plurality of bandwidth portions from the base station apparatus;
Based on the bandwidth configuration parameter information read from the bandwidth configuration table storage unit according to the resource allocation information received by the allocation information receiving unit, the reference signal band for each of a plurality of bandwidth portions. A reference signal control unit that performs allocation and generates a reference signal for uplink reception quality measurement;
A reference signal transmission unit that transmits the uplink reception quality measurement reference signal to a base station apparatus using the reference signal band allocated by the reference signal control unit;
Comprising
A wireless communication system. The transmission information control unit assigns a reference signal band by applying the common bandwidth configuration parameter information for each of the plurality of bandwidth portions,
The allocation information transmission unit includes, as the resource allocation information, bandwidth classification information, a bandwidth index, and a bandwidth level corresponding to the bandwidth configuration parameter information used by the transmission information control unit to allocate a reference signal band. And send
The allocation information receiving unit receives the bandwidth classification information, the bandwidth index, and the bandwidth level transmitted by the allocation information transmitting unit as the resource allocation information,
The reference signal controller uses the bandwidth classification information, the bandwidth index, and the bandwidth level received by the allocation information receiver to obtain bandwidth configuration parameter information from the bandwidth configuration table storage unit. The bandwidth index for the bandwidth portion corresponding to the bandwidth configuration parameter information is read and searched in the bandwidth configuration table storage unit in association with the bandwidth classification information corresponding to each bandwidth portion. And the bandwidth level is specified, and the bandwidth for the reference signal is assigned to the bandwidth portion using the bandwidth index and the bandwidth level specified thereby.
The wireless communication system according to claim 21. The transmission information control unit selects a bandwidth part having a bandwidth that does not exceed a predetermined maximum uplink transmission frequency bandwidth as a reference bandwidth part from the plurality of bandwidth parts, and A bandwidth ratio that is a ratio of the entire bandwidth and the bandwidth of the reference signal band in the reference bandwidth portion is calculated, and the bandwidths of the plurality of bandwidth portions are calculated based on the calculated bandwidth ratio According to the allocation of the reference signal band in the bandwidth portion,
The allocation information transmitting unit transmits, as the resource allocation information, the bandwidth ratio and the bandwidth level and bandwidth index information related to allocation of a reference signal band in the reference bandwidth portion,
The allocation information receiving unit receives the bandwidth classification information, the bandwidth index, the bandwidth level, and the bandwidth ratio transmitted by the allocation information transmitting unit as the resource allocation information,
The reference signal control unit calculates the bandwidth of the reference signal using the bandwidth classification information, the bandwidth index, the bandwidth level, and the bandwidth ratio received by the allocation information receiving unit, The bandwidth information of the reference signal calculated from the bandwidth configuration table storage unit is read, and the bandwidth configuration table storage unit is searched in association with the bandwidth classification information corresponding to each bandwidth part. A bandwidth index and a bandwidth level for the bandwidth portion corresponding to the calculated bandwidth information of the reference signal, a frequency hopping calculation parameter are specified, and the bandwidth index and the bandwidth level specified thereby are used. And assigning the reference signal band for the bandwidth part,
The wireless communication system according to claim 21. A wireless communication system comprising a first communication device and a second communication device, wherein wireless communication is performed between the first communication device and the second communication device,
The first communication device is
A first transmitter for transmitting a signal to the second communication device;
A first receiver for receiving a signal from the second communication device;
A bandwidth configuration table storage unit for storing a sounding reference signal bandwidth configuration table related to the sounding reference signal bandwidth index and the sounding reference signal bandwidth level;
A specific sounding reference signal bandwidth index and a sounding reference signal bandwidth level from the sounding reference signal bandwidth configuration table stored in the bandwidth configuration table storage unit based on a signal received by the first receiving unit. A transmission information control unit that selects and forwards the specific sounding reference signal bandwidth index and the sounding reference signal bandwidth level to the first transmission unit for transmission to the second communication device;
Comprising
The second communication device is
A second receiver for receiving a signal from the first communication device;
A second transmitter for transmitting a signal to the first communication device;
Based on the specific sounding reference signal bandwidth index and the sounding reference signal bandwidth level received by the second receiver from the first communication device, a sounding reference signal to be arranged in a plurality of bandwidth portions is generated, and A reference signal control unit for transferring the sounding reference signal to the second transmission unit to transmit the sounding reference signal to the first communication device;
Comprising
A wireless communication system.

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