Entitled wireless communication system, a base station apparatus, the terminal apparatus and transmission method
Technical field

[0001]
　The present invention relates to a radio communication system, a base station apparatus, a terminal apparatus and transmission method.
Background technique

[0002]
　Recently, for example, LTE in wireless communication system using the (Long Term Evolution), because the traffic continues to increase, it measures it is desirable to improve the communication quality to accommodate more traffic there. Therefore, for example, wireless LAN (Local Area Network) license used for such unwanted unlicensed bands: In (Unlicensed band 'hereinafter referred to as "U-band"), it has been studied to use the LTE technology.
[0003]
　Specifically, there is a technique called LAA (Licensed Assisted Access) that uses the LTE technology in U band. The LAA, for example, a mobile phone network such as a wireless communication system requires a license which is used in license band: in (Licensed band 'hereinafter referred to as "L-band") to be used supplementarily to send and receive data U band technology is there.
[0004]
　If the LAA is employed, for example, L a band in the control data is transmitted and received, such as user data of best effort in U band is thought to be transmitted and received. Then, for example, as a control channel of the downlink for transmitting control data to the terminal device from the base station apparatus, and the like EPDCCH which is standardized by 3GPP (Enhanced Physical Downlink Control CHannel). EPDCCH Unlike PDCCH over the entire frequency band of the downlink (Physical Downlink Control CHannel), is to use a PDSCH (Physical Downlink Shared CHannel) and the control channel part of the frequency band as well.
[0005]
　Incidentally, L since the band is a frequency band that requires a license, operators and the like that has acquired the license can occupy a particular frequency band belonging to the L-band, the interference with communication in another wireless communication system does not occur. On the other hand, U band is not required a license, for example because it is used by other radio communication systems, such as LAA wireless LAN or different operators operate, when the wireless communication using the U band is performed, other interference may occur between the communication in a wireless communication system. Therefore, if the LAA is employed, it is preferable to introduce a mechanism to prevent interference with other communication. For example, as the carrier sense, when the device is to implement the wireless communication, it is conceivable to introduce LBT to confirm whether the wireless communication is being performed (Listen Before Talk) by other devices . When introducing the LBT, the device for the transmission, detects the received energy in the frequency band used for transmission, determine whether transmissions by other devices is being executed. Then, if it is not being transmitted by another device is running, the transmission of data is performed is used this frequency band. Thus, it is possible to prevent interference due to a collision of the communication between devices for transmitting data in the same frequency band.
CITATION

Patent Document

[0006]
Patent Document 1: Laid-Open Patent Publication No. 2006-186992
Patent Document 2: Japanese Patent Publication No. 2014-500685
Patent Document 3: Laid-Open Patent Publication No. 2002-124916
Patent Document 4: Japanese Patent Publication No. 2008-508774
Non-patent literature

[0007]
Non-Patent Document 1: 3GPP TS 36.211 V12.3.0 2014 dated years. 9
Summary of the Invention

Problems that the Invention is to Solve

[0008]
　As described above, when performing communication using the U band, it is preferably LBT is performed to prevent interference with communication in another wireless communication system. When the LBT is executed by the execution result, actually whether or not to transmit the data in U-band are determined. That is, as a result of the LBT, the other device is verified to not be transmitting data, but transmission of data by U band is executed, if another device is transmitting data, the data by U band transmission of is postponed. Therefore, until the execution result of the LBT is obtained is not really whether the data in U band is transmitted is determined.
[0009]
　Thus, for example, with respect to the mapping of the control channel of the DCI (Downlink Control Information) indicating the allocation of data in the downlink, the base station apparatus, it is difficult to keep mapped in advance control channel DCI of L-band and U-band there is a problem that is.
[0010]
　I.e., for the L band, allocation of downlink data by the scheduling despite being previously determined, for U-band, until the execution result of the LBT is obtained are allocated actually data in downlink whether or not is not determined. Therefore, when the advance mapping DCI L-band and U-band control channel such as a base station apparatus, for example EPDCCH, the LBT execution results for U band that is not assigned the data as the DCI is there.
[0011]
　Specifically, for example, when the DCI of L-band and U bands were previously mapped to EPDCCH, the transmission of data in U band is postponed by the execution result of the LBT, allocation of data to U band is eliminated. Therefore, no longer appropriate DCI which has been previously mapped, DCI L-band only is to be re-mapped to EPDCCH.
[0012]
　Thus, since the up execution result of LBT are obtained not been determined whether the assignment of the data for the U band, the base station apparatus, it is difficult to advance maps DCI for the control channel. Therefore, after the execution result of the LBT is obtained, it is also conceivable to map the DCI for L-band and U-band control channel. However, in this case, actually for data to complete the DCI mapping short time L-band and U-band to sub-frame to be transmitted, it becomes necessary to speed up the mapping process DCI. As a result, a demand and high performance of hardware, resulting in an increase in cost.
[0013]
　The technology disclosed, which has been made in view of the above, it is possible to license is a frequency band and licenses required for transmitting control information when performing communication using an unnecessary frequency band efficiently and to provide a wireless communication system, a base station apparatus, a terminal apparatus and transmission method.
Means for Solving the Problems

[0014]
　Wireless communication system disclosed by this application, in one aspect, a wireless communication system having a base station apparatus and a terminal apparatus, the base station apparatus, a first interference with communication in another wireless communication system does not occur of a first mapping unit that maps the first control information on a frequency band, a second mapping the second control information on the second frequency band where the interference may occur with communication in another wireless communication system a mapping unit, a generation unit for generating the first control information and the control channel signal arrangement to the second different region control information, a control channel signal generated by the generating unit to the terminal device and a transmission section for transmitting.
Effect of the Invention

[0015]
　Wireless communication system disclosed in this application the base station apparatus, according to one aspect of the terminal apparatus and transmission method, the control information when license is a frequency band and licenses required to communicate using an unnecessary frequency band an effect that can be efficiently transmitted.
BRIEF DESCRIPTION OF THE DRAWINGS

[0016]
[1] Figure 1 is a block diagram showing a configuration of a base station apparatus according to the first embodiment.
FIG. 2 is a block diagram showing a configuration of a terminal apparatus according to the first embodiment.
FIG. 3 is a flow diagram showing a transmission processing according to the first embodiment.
[4] FIG. 4 is a diagram showing a specific example of the subframe structure according to the first embodiment.
FIG. 5 is a diagram showing a specific example of the subframe structure according to the second embodiment.
FIG. 6 is a diagram showing a specific example of the subframe structure according to the third embodiment.
[7] FIG. 7 is a diagram showing a specific example of the subframe structure according to the fourth embodiment.
[8] FIG. 8 is a diagram showing a specific example of a subframe configuration according to the fifth embodiment.
[9] FIG. 9 is a block diagram showing a hardware configuration example of the base station apparatus.
DESCRIPTION OF THE INVENTION

[0017]
　Hereinafter, a wireless communication system, a base station apparatus disclosed in this application embodiments of the terminal apparatus and transmission method will be described in detail with reference to the drawings. It should be understood that the present invention is not limited by these embodiments.
[0018]
(Embodiment 1)
　FIG. 1 is a block diagram showing a configuration of a base station apparatus 100 according to the first embodiment. The base station apparatus 100 shown in FIG. 1, L-band receiver 101, U-band receiver 102, CP (Cyclic Prefix: cyclic prefix) removing portions 103,104, FFT (Fast Fourier Transform: fast Fourier transform) unit 105, 106, the channel separating unit 107 includes a decoding unit 108 and the U band free determination unit 109. These processing unit is a processing unit on the receiving side of the base station apparatus 100. Further, the base station apparatus 100, U-band mapping section 110, L-band mapping unit 111, EPDCCH generator 112, IFFT (Inverse Fast Fourier Transform : inverse fast Fourier transform) section 113 and 114, CP adding section 115, 116 , having an L-band transmit unit 117 and the U-band transmission portion 118. These processing unit is a processing unit of the transmitting side of the base station apparatus 100.
[0019]
　L-band receiver 101 receives a signal of the L band. That, L-band receiver 101 receives the frequency band of the signal required license, for example 2GHz band.
[0020]
　U band receiving section 102 receives a signal of the U band. That, U band receiving section 102, for example, license such 5GHz band to receive signals unnecessary frequency band.
[0021]
　CP removing section 103 and 104, OFDM from the received signal of the L band and U-band, respectively: removing the added CP between (Orthogonal Frequency Division Multiplexing orthogonal frequency division multiplexing) symbols. That is, when the radio communication of the OFDM scheme is performed, since the CP is added to prevent inter-symbol interference between OFDM symbols constituting the radio signal, CP removing section 103 and 104, remove the CP to. In this embodiment, a description is given of a case where the radio communication of the OFDM scheme is performed, the present invention is also applicable to the case where the wireless communication other than OFDM method is performed. Therefore, when the radio communication other than OFDM scheme is performed, CP removing section 103 and 104 may be omitted.
[0022]
　FFT section 105 and 106, a reception signal of the L band and U-band fast Fourier transform, respectively, to obtain a signal of a plurality of subcarriers having frequencies orthogonal to each other. That, FFT units 105 and 106 by converting the received signal in the time domain into signal in the frequency domain to obtain a signal of a plurality of subcarriers. Similar to FFT section 105 and 106 also above the CP removing section 103 and 104, since a processing unit for executing processing when the radio communication of the OFDM scheme is performed, when the radio communication other than OFDM method is performed it is possible to omit the.
[0023]
　Channel separating unit 107 separates the signals of a plurality of subcarriers L-band and U bands signal for each channel. That is, since the received signal of the L band and U-band signals of a plurality of channels are frequency-multiplexed and time multiplexed, the channel separating unit 107, a data channel and control for each example terminal device the received signals of the respective bands separating the channel signal.
[0024]
　Decoding unit 108 decodes the signal of each channel obtained by the channel separating unit 107 to obtain decoded data.
[0025]
　U band free determination unit 109, when the data to be transmitted using the U band occurs, detects the received energy in the channel of the U-band, determines whether vacant U band. That, U band free determination unit 109, when the data to be transmitted using the U band occurs, performs carrier sense. Specifically, U band free determination unit 109, when receiving energy in U band is above a predetermined threshold value, U band is determined to be in use by other devices. Also, U band free determination unit 109, when receiving energy in U band is less than the predetermined threshold value, determines that empty U band.
[0026]
　Also, U band free determination unit 109, after determining that the empty U band, to periodically perform carrier sense continuously for a predetermined time period. That, U band free determination unit 109 during the back-off time is determined at random for each predetermined time and apparatus after it is determined that vacant U band, such as DIFS (Distributed Inter-Frame Space) , to periodically perform carrier sense to continue.
[0027]
　Then, during the DIFS and back-off time, when it is determined that the empty U band is continuously U band free determination unit 109 determines to transmit the data using the U-band, this fact U It notifies the band for the mapping unit 110. On the other hand, U band free determination unit 109, when the U band between the DIFS and back-off time is determined to be in use by another device determines to postpone data transmission using U band, predetermined again to execute the carrier sense after the lapse of time.
[0028]
　U-band mapping unit 110, when the data to be transmitted using the U band occurs, the components of the control channel the DCI for U band showing the allocation of downlink data in the U-band REG (Resource mapped to the Element Group). That, U-band mapping unit 110 generates a DCI for U band indicating which subband of a frequency that stores data for each sub-band which terminal device addressed in the U band. Then, U-band mapping unit 110, the instruction to send the data using the U band is notified from the U band free determination unit 109, the U-band DCI mapped in advance REG to EPDCCH generator 112 Output. On the other hand, U-band mapping unit 110, when the instruction to send the data using the U band is not notified from the U band free determination unit 109, temporarily without outputting the DCI for U-band mapped to the REG to hold.
[0029]
　As the DCI for U-band, in addition to the DL (DownLink) assignments showing allocation of data of the downlink as described above, UL for permitting transmission of uplink using U-band to the terminal device (UpLink) grant may also be included.
[0030]
　L-band mapping unit 111, when the data to be transmitted using the L band occurs, map the DCI for L band showing the allocation of data in the downlink in the L band REG. That, L-band mapping unit 111 generates DCI for L band indicating which subband of a frequency that stores data for each sub-band which terminal device addressed in the L-band. Then, the L-band mapping unit 111, with or without the transmission of data using U band, and outputs the L-band DCI mapped to REG to EPDCCH generator 112.
[0031]
　EPDCCH generation unit 112 arranges the DCI for U-band DCI and L-band are output from the U-band mapping unit 110 and the L-band mapping unit 111 into EPDCCH region of the L-band. Specifically, EPDCCH generation unit 112, the REG that DCI for U-band DCI and L-band is mapped are allocated to different frequencies of the subcarriers EPDCCH region of the L-band. Thus, for example, even if the L-band DCI from the L-band mapping unit 111 from the U-band mapping unit 110 without being output DCI for U band is outputted, EPDCCH generator 112 independently DCI for L-band it can be allocated to the subcarriers EPDCCH region.
[0032]
　Then, EPDCCH generation unit 112 outputs to the IFFT unit 113 a U-band DCI and L-band DCI allocated to subcarriers L-band with the data allocated to the other sub-carrier of the L-band. Further, EPDCCH generation unit 112 outputs the data allocated to subcarriers U band to the IFFT unit 114.
[0033]
　IFFT section 113 and 114, respectively inverse fast Fourier transform data of each subcarrier of the L-band and U-band, to obtain the OFDM symbol in the time domain. That, IFFT section 113 and 114, by converting the data of the frequency region allocated to each subcarrier to a time domain signal to obtain an OFDM symbol. Incidentally, IFFT section 113 and 114, similarly to the above-described CP removing section 103, 104 and FFT unit 105 and 106, since a processing unit for executing processing when the radio communication of the OFDM scheme is performed, except OFDM scheme It can be omitted if the wireless communication is performed.
[0034]
　CP adding section 115 adds a CP between OFDM symbols of L-band and U-band, respectively, to generate a transmission signal of the L band and U bands. Similarly to the CP adding units 115 also above IFFT unit 113 and 114, since a processing unit for executing processing when the radio communication of the OFDM scheme is performed, when the radio communication other than OFDM method is performed it is possible to omit the.
[0035]
　L-band transmit unit 117 transmits the transmission signal of the L band. That, L-band transmit unit 117 transmits the transmission signal license is required frequency band such as, for example, 2GHz band.
[0036]
　U-band transmit unit 118 transmits the transmission signal of the U band. That, U band transmission unit 118, for example, license such 5GHz band to transmit a transmission signal of an unnecessary frequency band.
[0037]
　Next, the configuration of a terminal device that receives a signal transmitted from the base station apparatus 100. Figure 2 is a block diagram showing a configuration of a terminal apparatus 200 according to the first embodiment. Terminal apparatus 200 shown in FIG. 2, having an L-band receiving section 201, U-band receiver 202, CP removing section 203 and 204, FFT section 205, 206 and the decoding unit 207. These processing unit is a processing unit of the receiving terminal device 200. The terminal device 200 includes a scheduler section 208, coding section 209, channel multiplexing section 210, IFFT section 211 and 212, CP adding section 213 and 214, L-band transmit unit 215 and the U-band transmission portion 216. These processing unit is a processing unit of the transmitting terminal device 200.
[0038]
　L-band receiving section 201 receives a signal of the L band. That, L-band receiving section 201 receives a frequency band of the signal required license, for example 2GHz band.
[0039]
　U band receiver 202 receives the signal U band. That, U-band receiver 202, for example, license such 5GHz band to receive signals unnecessary frequency band.
[0040]
　CP removing section 203 removes the CP that has been added from a received signal of the L band and U-band respectively between OFDM symbols. Similarly to the CP removing section 203 and 204 also above the CP removing section 103 and 104, since a processing unit for executing processing when the radio communication of the OFDM scheme is performed, the wireless communication other than OFDM method is performed It may be omitted in the case.
[0041]
　FFT section 205 and 206, a reception signal of the L band and U-band fast Fourier transform, respectively, to obtain a signal of a plurality of subcarriers having frequencies orthogonal to each other. Similar to the FFT unit 205, 206 also above the CP removing section 203 and 204, since a processing unit for executing processing when the radio communication of the OFDM scheme is performed, when the radio communication other than OFDM method is performed it is possible to omit the.
[0042]
　Decoding unit 207 decodes the signals of a plurality of subcarriers L-band and U-band to obtain decoded data for the terminal device 200 destined. That is, the decoding unit 207, among the signals of a plurality of sub-carriers, and decodes the signals allocated to subcarriers EPDCCH region of L-band, obtaining the DCI and DCI for U-band L-band. Then, decoding section 207 refers to the DCI for L-band, decodes the signals of subcarriers included in the subbands assigned to the terminal device 200 of the subbands in L-band. Similarly, the decoding unit 207 refers to the DCI for U-band, decodes the signals of subcarriers included in the subbands assigned to the terminal device 200 of the subbands in U band.
[0043]
　At this time, the decoding unit 207 refers to the DL assignment included in the DCI and DCI for U-band L-band, it is determined whether the data of the terminal device 200 destined is stored in which sub-band. Further, decoding section 207, if it contains UL Grant DCI for U-band outputs UL grant to the scheduler section 208.
[0044]
　The scheduler unit 208, when the UL grant is output from the decoding unit 207, determines a subframe data uplink transmission is permitted based on the UL grant, perform scheduling for transmitting data in this sub-frame to. Specifically, the scheduler unit 208, for example, determines a subframe in which data transmission of the uplink is allowed subframe after a predetermined number than the sub-frame UL grant is received.
[0045]
　Encoding unit 209, according to scheduling in the scheduler unit 208 encodes the transmission data of the uplink. The encoding unit 209 outputs the obtained encoded data to the channel multiplexer 210.
[0046]
　Channel multiplexer 210, a reference signal for channel quality measurement of the encoded data and, for example, uplink output from the coding unit 209 performs frequency multiplexing and time multiplexing are assigned to each channel of the L-band and U bands. That is, the channel multiplexing unit 210 assigns the coded data and reference signals to a plurality of subcarriers and a plurality of sub-frames in the L-band and U bands.
[0047]
　IFFT section 211 and 212, respectively inverse fast Fourier transform data of each subcarrier of the L-band and U-band, to obtain the OFDM symbol in the time domain. That, IFFT section 211 and 212, by converting the data of the frequency region allocated to each subcarrier to a time domain signal to obtain an OFDM symbol. Incidentally, IFFT section 211 and 212, similarly to the above-described CP removing section 203, 204 and the FFT unit 205 and 206, since a processing unit for executing processing when the radio communication of the OFDM scheme is performed, except OFDM scheme It can be omitted if the wireless communication is performed.
[0048]
　CP adding section 213 adds a CP between OFDM symbols of L-band and U-band, respectively, to generate a transmission signal of the L band and U bands. Similarly to CP adding section 213 and 214 also above IFFT unit 211 and 212, since a processing unit for executing processing when the radio communication of the OFDM scheme is performed, when the radio communication other than OFDM method is performed it is possible to omit the.
[0049]
　L-band transmit unit 215 transmits the transmission signal of the L band. That, L-band transmit unit 215 transmits the transmission signal license is required frequency band such as, for example, 2GHz band.
[0050]
　U-band transmit unit 216 transmits the transmission signal of the U band. That, U band transmission unit 216, for example, license such 5GHz band to transmit a transmission signal of an unnecessary frequency band.
[0051]
　Next, the transmission processing of DCI by the base station apparatus 100 configured as described above will be described with reference to the flow diagram shown in FIG.
[0052]
　In the base station apparatus 100, if the data to be transmitted to a terminal device such as the terminal device 200 is generated, DCI containing DL assignments indicating allocation positions in the downlink of the data is generated. Specifically, for the data to be transmitted using the L-band, DCI for L band showing the subbands in L-band, each of the data is allocated are mapped to the REG by the L-band mapping section 111 ( step S101). Similarly, for data to be transmitted using the U-band, DCI for U band showing the subbands in U bands each data is allocated are mapped to the REG by the mapping unit 110 for the U band (step S102 ).
[0053]
　Mapping of these DCI may be performed at any timing before the timing of DCI is actually sent. That is, for example, when the data to be transmitted is generated, immediately mapping each DCI may be performed. Further, since the L-band DCI and DCI for U band is mapped to REG independently from each other, if the data is transmitted using only the L-band only or U-band corresponds to the band used one of the DCI may be mapped to the REG. The following explanation will be given assuming that the data is transmitted using both the L-band and U bands.
[0054]
　If the data to be transmitted using the U band occurs, in parallel with the mapping DCI for U-band, carrier sense is performed by U band free determination unit 109. That is, the U-band free determination unit 109, is detected reception energy of the received signals received by the U-band receiver 102, whether vacant U band is determined (step S103). Specifically, if the received energy in the U band is above a predetermined threshold value, it is determined that another device is not empty is U band being transmitted, received energy in the U band is less than the predetermined threshold value in this case, it is determined that the device in the transmission is vacant without U band.
[0055]
　U band result of the determination by the empty judgment unit 109, if is empty U-band (step S103Yes), DCI is a U-band mapped by U-band mapping unit 110 is output to the EPDCCH generator 112. Further, DCI for L-band mapped by the L-band mapping unit 111, irrespective of the result of determination by the U band free determination unit 109, is output to the needed EPDCCH generator 112. Then, the EPDCCH generation unit 112, DCI for DCI and L-band U band is placed EPDCCH region of the L-band. Specifically, REG to DCI for U-band DCI and L-band is mapped are allocated to different frequency subcarriers EPDCCH region of the L-band. Thus, EPDCCH the DCI for U-band DCI and L-band are arranged in different frequencies is generated (step S104).
[0056]
　On the other hand, the result of the judgment by the U band free determination unit 109, if no empty U-band (step S103No), DCI for U-band mapped by the mapping unit 110 for the U band is held as it is (Step S105) . In contrast, DCI for L-band mapped by the L-band mapping unit 111, irrespective of the result of determination by the U band free determination unit 109, is output to the needed EPDCCH generator 112. Then, the EPDCCH generation unit 112, DCI for L band is arranged in the EPDCCH region of the L-band. Specifically, DCI for L band is mapped REG is assigned to subcarriers EPDCCH region of the L-band. Thus, EPDCCH including DCI for L-band is generated (step S106).
[0057]
　Since the DCI for the L-band DCI and U bands are arranged at different frequencies EPDCCH region, with or without the transmission of DCI for U-band, disposed EPDCCH independently DCI for L-band can do. Further, since the DCI for U band is retained even if no empty U band, when the empty U band the DCI for the U band remain intact can be placed EPDCCH. As a result, previously mapped DCI and DCI for U-band L-band, it can be generated in a short time EPDCCH.
[0058]
　L-band DCI for L-band DCI and U bands allocated to the subcarriers constituting EPDCCH of is output together with the data allocated to the other sub-carrier of L-band according DCI for L-band to the IFFT unit 113. Further, data allocated to each subcarrier of the U-band according DCI for U band is output to IFFT section 114. Then, the IFFT unit 113 and 114, data allocated to each subcarrier is inverse fast Fourier transform (step S107), the OFDM symbol of the L-band and U-band respectively are generated.
[0059]
　The generated OFDM symbols, CP is added by CP adding section 115 (step S108), the resulting transmission signal is transmitted from the L-band transmit unit 117 and the U-band transmission portion 118, respectively (Step S109) .
[0060]
　Signal transmitted from the base station apparatus 100 is received by the terminal apparatus 200, by EPDCCH the L-band is decoded by the decoding unit 207, the data of the terminal device 200 destined is grasped subcarriers allocated. That is, the position of the data of the terminal device 200 destined for the L-band from DCI for L band EPDCCH is grasped, the position of the data of the terminal device 200 destined for the U band is grasped from the DCI for U band EPDCCH. Then, the decoding unit 207, the data of the terminal device 200 destined for L-band and U-band is decoded. Further, when the DCI for U band including UL grant, the scheduler unit 208, uplink scheduling in accordance with the UL grant is performed.
[0061]
　Next, a specific example of a subframe configuration in a radio communication system according to the first embodiment will be described with reference to FIG. Figure 4 is a diagram showing in time series data to be transmitted using each frequency band of the L-band and U bands.
[0062]
　In L-band, three terminals UE # 1 ~ # data 301 3 addressed data is frequency-multiplexed is transmitted by the base station apparatus. Then, DL assignment 302 for this data 301 are transmitted in each of the same subframe and data. DL assignment 302 is DCI for L-band, is transmitted are arranged in frequency of, for example EPDCCH region. Terminal UE # 1 ~ # 3, by receiving and decoding the DL assignment 302 EPDCCH region, that data for each subject apparatus to grasp either be assigned to any sub-band in the L-band it can.
[0063]
　In addition, the frequency different from the frequencies DL assignment 302 EPDCCH region of the L-band are disposed, it is transmitted is arranged DCI for U band. That, DL assignment 303 and UL Grant 304 about U band is disposed to the frequency of EPDCCH region. Terminal UE # 1 ~ # 3, by receiving and decoding the DL assignment 303 for EPDCCH region, that data for each subject apparatus to grasp either be assigned to any sub-band in the U-band it can. The terminal device UE # 1 ~ # 3, by receiving and decoding the UL grant 304 EPDCCH region, it is possible to grasp whether the authorization of the data transmission on the uplink using the U band.
[0064]
　Thus, in the EPDCCH region of the L-band, and L-band DCI302 and U-band DCI303,304 is transmitted are arranged in different frequencies. Therefore, the base station apparatus in advance maps DCI302 and U-band DCI303,304 for L-band, in accordance with the carrier sense result, transmits the DCI both to send only the L-band DCI302 Band or can.
[0065]
　On the other hand, in the U-band, there is the frequency band of the U band is occupied for example by the transmission of the data 351 by the wireless LAN. When data to be transmitted using the U band from the base station apparatus in this state occurs, the base station apparatus periodically detects the reception energy in the U-band, determines whether vacant U band. Then, when the transmission of the data 351 by wireless LAN is empty U band finished, predetermined during the DIFS also continued periodic carrier sense, backoff determined at random more per base station apparatus also to continue the carrier sense during the time. As a result, when vacant is U band, the base station apparatus transmits a dummy signal 352 to the beginning of the next subframe. Dummy signal 352 is a signal occupying a frequency band of the U-band, is transmitted to reserve use of the U band. In other words, as a result of another apparatus executes the carrier sense, in order to prevent it is determined that vacant U band, the dummy signal 352 is transmitted in U band.
[0066]
　Then, the dummy signal 352 from the next sub-frame transmitted, the terminal apparatus UE # 1 ~ # data 353 3 addressed data is frequency-multiplexed is transmitted by the base station apparatus. The DL assignment 303 relating to the data 353, as described above, by using the EPDCCH L-band are transmitted in the same subframe and respective data. Further, after the sub-frame data 353 downlink is transmitted, special subframe 354 is provided, upstream of the data 355 is transmitted in sub-frames after the special subframe 354. Uplink data 355, terminal apparatus UE # 1 ~ # 3 executes scheduling using UL grant 304 sent using the EPDCCH L-band, it is transmitted in accordance with the scheduling.
[0067]
　As described above, according to this embodiment, DCI for L-band DCI and U bands are transmitted are arranged in different frequencies EPDCCH region of the L-band. Thus, the carrier sense result, even if the transmission of data using the U band was postponed, can transmit L-band DCI in advance mapped independently of the DCI for U band. Also, holding the U-band DCI which is previously mapped temporarily, the result of the carrier sense, it is possible to send the case, held U-band DCI transmission data using U band is performed . Therefore, it is possible to license is a frequency band and licenses required for transmitting control information when performing communication using an unnecessary frequency band efficiently.
[0068]
　Although in the above-mentioned first embodiment, an example in which DCI for L-band DCI and U bands are arranged in different frequencies EPDCCH region of the L-band, the same effect be arranged in different areas it is possible to obtain.
[0069]
(Embodiment 2)
　Features of the second embodiment, arranged in different frequencies and a UL grant indicating transmission permission of the data on the uplink in the DL assignments and U bands indicating allocation of a data downlink in the U-band is the point.
[0070]
　Configuration of a base station apparatus and a terminal apparatus according to the second embodiment is the same as the base station apparatus 100 and the terminal device 200 according to the first embodiment, description thereof will be omitted. In the second embodiment, the operation of the EPDCCH generator 112 of the base station apparatus 100 is different from the first embodiment.
[0071]
　EPDCCH generation unit 112 arranges the DCI for U-band DCI and L-band are output from the U-band mapping unit 110 and the L-band mapping unit 111 into EPDCCH region of the L-band. At this time, EPDCCH generation unit 112, the REG that DCI for U-band DCI and L-band is mapped are allocated to different frequencies of the subcarriers EPDCCH region of the L-band. Furthermore, EPDCCH generation unit 112, a REG in which a DL assignment and UL grant is mapped out of the DCI for the U band, allocated to different frequency sub-carrier in the EPDCCH region of the L-band.
[0072]
　That is, in the second embodiment, the UL grant for DL ​​assignments and U bands for the L-band DCI and U bands are arranged in different frequencies from each other. Thus, for example, from the U-band mapping unit 110 even when the DL assignments for U band without being output UL grant for U band is outputted, EPDCCH generator 112 for the L-band DCI and U bands it can be assigned to DL assignment to subcarriers EPDCCH region.
[0073]
　Next, a specific example of a subframe structure in a wireless communication system according to the second embodiment will be described with reference to FIG. Figure 5 is a diagram showing in time series data to be transmitted using each frequency band of the L-band and U bands. 5, the same reference numerals are given to the same parts as in FIG. 4, and the detailed descriptions thereof are omitted.
[0074]
　In L-band, as in the first embodiment, the DL assignment 302 is transmitted for the three terminals UE # 1 ~ # data 301 data is frequency-multiplexed three addressed and data 301. In addition, the frequency different from the frequencies DL assignment 302 EPDCCH region of the L-band are arranged, DL assignments 401 and UL Grant 402 for U band is transmitted are disposed. That, DL assignment 401 and UL Grant 402 are arranged at different frequencies EPDCCH region. Terminal UE # 1 ~ # 3, by receiving and decoding the DL assignment 401 for EPDCCH region, that data for each subject apparatus to grasp either be assigned to any sub-band in the U-band it can. The terminal device UE # 1 ~ # 3, by receiving and decoding the UL grant 402 EPDCCH region, it is possible to grasp whether the authorization of the data transmission on the uplink using the U band.
[0075]
　Thus, in the EPDCCH region of the L-band, UL grant 402 for DL ​​assignment 401 and U bands for the L-band DCI302, U band is transmitted are arranged in different frequencies. Therefore, the base station apparatus, for L-band DCI302, advance mapping DL assignments 401 and UL Grant 402 for U band for U-band, in accordance with the carrier sense result, DCI302 only for L-band or you can send the DCI of transmission or both bands. Furthermore, for example, although the downlink data is transmitted in U band when unauthorized data transmission uplink in the U-band, the base station apparatus, transmitting only the DL assignment 401 of the DCI for the U band It can also be. Then, the base station apparatus, it is possible to temporarily hold the UL grant 402 previously mapped, when permitted data transmission uplink in the U-band, and transmits the UL grant 402 retained.
[0076]
　As described above, according to this embodiment, DCI for L-band DCI and U bands are transmitted are arranged in different frequencies EPDCCH region of the L-band. Also be transmitted are arranged in different frequencies EPDCCH regions also DL assignments and UL grant of the DCI for the U band L-band. Transmitting Thus, the carrier sense result, for example, even if one data transmission uplink data transmission of downlink using U band is performed is not performed, the DL assignments in advance mapped independently of the UL grant can do. Also, previously temporarily holds mapped UL grant, the carrier sense result can be transmitted when the data transmission on the uplink using the U band is performed, the retained UL grant. Therefore, it is possible to license is a frequency band and licenses required for transmitting control information when performing communication using an unnecessary frequency band efficiently.
[0077]
　While in this second embodiment, an example in which a DL assignment and UL grant included in the DCI for the L-band DCI and U bands are arranged in different frequencies EPDCCH region of L-band, different areas it is arranged to be able to obtain the same effect.
[0078]
(Embodiment 3)
　Features of Embodiment 3 is that arranging the UL grant indicates the transmission permitted data uplink in the U band U band.
[0079]
　Configuration of a base station apparatus and a terminal apparatus according to the third embodiment is the same as the base station apparatus 100 and the terminal device 200 according to the first embodiment, description thereof will be omitted. In the third embodiment, the operation of the EPDCCH generator 112 of the base station apparatus 100 is different from the first embodiment.
[0080]
　EPDCCH generation unit 112, a DCI for U-band DCI and L-band are output from the U-band mapping unit 110 and the L-band mapping unit 111, a predetermined control channel region of the EPDCCH region and U-band L-band It is placed within. At this time, EPDCCH generating unit 112, and a REG to REG and L-band DCI for DL ​​assignments have been mapped out of the DCI for U band is mapped, the different frequencies of the subcarriers EPDCCH region of the L-band assign. Further, EPDCCH generator 112, U and REG which UL grant is mapped out of the band for DCI, allocated to subcarriers of a predetermined control channel region of the U band.
[0081]
　That is, in the third embodiment, the UL grant for DL ​​assignments and U bands for the L-band DCI and U bands are arranged in different frequencies from each other. In this case, UL grant for the U band, rather than the frequency of EPDCCH region of the L-band, is arranged in the frequency of the predetermined control channel region of the U band. Therefore, to reduce the resources used in the EPDCCH license is required L-band, it is possible to reduce overhead.
[0082]
　Next, a specific example of a subframe structure in a wireless communication system according to the third embodiment will be described with reference to FIG. Figure 6 is a diagram showing in time series data to be transmitted using each frequency band of the L-band and U bands. 6, the same reference numerals are given to the same parts as FIGS. 4 and 5, and the detailed descriptions thereof are omitted.
[0083]
　In L-band, as in the first embodiment, the DL assignment 302 is transmitted for the three terminals UE # 1 ~ # data 301 data is frequency-multiplexed three addressed and data 301. In addition, the frequency different from the frequencies DL assignment 302 EPDCCH region of the L-band are arranged, DL assignment 401 for U band is transmitted are disposed. In addition, the frequency of the predetermined control channel region of the U-band, UL grant 501 for U band is transmitted are disposed. That, UL grant 501, not the EPDCCH region of the L-band, is arranged in a U band. Terminal UE # 1 ~ # 3, by receiving and decoding the DL assignment 401 for EPDCCH region, that data for each subject apparatus to grasp either be assigned to any sub-band in the U-band it can. The terminal device UE # 1 ~ # 3, by receiving and decoding the UL grant 501 the predetermined control channel region of the U-band, grasp the presence or absence of authorization data transmission on the uplink using the U band can do.
[0084]
　Thus, in the EPDCCH region of the L-band, DL assignment 401 for DCI302 and for U-band L-band are transmitted are arranged in different frequencies, in the predetermined control channel region of the U-band, U UL grant 501 for band is transmitted are disposed. Therefore, the base station apparatus, for L-band DCI302, advance mapping DL assignments 401 and UL Grant 501 for U band for U-band, in accordance with the carrier sense result, DCI302 only for L-band or you can send the DCI of transmission or both bands. Furthermore, for example, although the downlink data is transmitted in U band when unauthorized data transmission uplink in the U-band, the base station apparatus, transmitting only the DL assignment 401 of the DCI for the U band It can also be. Then, the base station apparatus, temporarily retaining the UL grant 501 in advance mapped, when permitted data transmission uplink in the U-band, a UL grant 501 held using U-band transmission can do.
[0085]
　As described above, according to this embodiment, DCI for L-band DCI and U bands are transmitted are arranged in different frequencies of the predetermined control channel region of EPDCCH region and U-band L-band. Further, UL grant of the DCI for the U band is transmitted is arranged on a predetermined control channel region of the U band. Therefore, to reduce the DCI disposed EPDCCH region of the L-band, it is possible to reduce the overhead in EPDCCH.
[0086]
　In the third embodiment, an example in which a DL assignment included in the DCI for the L-band DCI and U bands are arranged in different frequencies EPDCCH region of L-band, located in different areas You can achieve the same effect if.
[0087]
(Embodiment 4)
　Features of Embodiment 4 differs a UL grant indicating transmission permission of the data on the uplink in the DL assignments and U bands indicating allocation of a data downlink in the U-band within the U-band is a point to be placed in frequency.
[0088]
　Configuration of the base station apparatus and the terminal apparatus according to the fourth embodiment is the same as the base station apparatus 100 and the terminal device 200 according to the first embodiment, description thereof will be omitted. In the fourth embodiment, the operation of the EPDCCH generator 112 of the base station apparatus 100 is different from the first embodiment.
[0089]
　EPDCCH generation unit 112, a DCI for U-band DCI and L-band are output from the U-band mapping unit 110 and the L-band mapping unit 111, a predetermined control channel region of the EPDCCH region and U-band L-band It is placed within. At this time, EPDCCH generating unit 112 assigns the DCI for L band is mapped REG to subcarriers EPDCCH region of the L-band. Further, EPDCCH generation unit 112, the REG that DCI for U band is mapped are allocated to different frequency subcarriers of a predetermined control channel region of the U band. That, EPDCCH generation unit 112 arranges the DL assignments and UL grant in the U-band at different frequencies in a predetermined control channel region of the U band.
[0090]
　In the fourth embodiment, while the DCI for L band is arranged in the L-band, DCI U-band is arranged in a U band. In this case, DL assignment and UL grant included in the DCI for U band are arranged at different frequencies in a predetermined control channel region. Therefore, to reduce the resources used in the EPDCCH license is required L-band, it is possible to reduce overhead.
[0091]
　Next, a specific example of a subframe structure in a wireless communication system according to the fourth embodiment will be described with reference to FIG. Figure 7 is a diagram showing in time series data to be transmitted using each frequency band of the L-band and U bands. 7, the same reference numerals are given to the same parts as in FIG. 4, and the detailed descriptions thereof are omitted.
[0092]
　In L-band, as in the first embodiment, the DL assignment 302 is transmitted for the three terminals UE # 1 ~ # data 301 data is frequency-multiplexed three addressed and data 301. DL assignment 302 is transmitted is disposed EPDCCH region of the L-band.
[0093]
　On the other hand, the frequency of the predetermined control channel region of the U-band, is transmitted is arranged DCI for U band. Specifically, DL assignment 601 and UL Grant 602 for U band is transmitted are arranged at different frequencies in a predetermined control channel region of the U band. That, DL assignment 601 and UL Grant 602, not the EPDCCH region of the L-band, is arranged in a U band. Terminal UE # 1 ~ # 3, by receiving and decoding the DL assignment 601 for a given control channel region of the U-band, data addressed to the device itself is assigned to which sub-band in U-band respectively it is possible to grasp whether to have. The terminal device UE # 1 ~ # 3, by receiving and decoding the UL grant 602 the predetermined control channel region of the U-band, grasp the presence or absence of authorization data transmission on the uplink using the U band can do.
[0094]
　Thus, in the EPDCCH region of L-band, L-band DCI302 are transmitted are arranged in the predetermined control channel region of the U-band, DL assignment 601 and UL Grant 602 for U band together is transmitted are arranged at different frequencies. Therefore, the base station apparatus, for L-band DCI302, advance maps UL grant 602 for DL ​​assignment 601 and U bands for U-band, in accordance with the carrier sense result, DCI302 only for L-band or you can send the DCI of transmission or both bands. Furthermore, for example, although the downlink data is transmitted in U band when unauthorized data transmission uplink in the U-band, the base station apparatus, transmitting only the DL assignment 601 of the DCI for the U band It can also be. Then, the base station apparatus, temporarily retaining the UL grant 602 previously mapped, when permitted data transmission uplink in the U-band, a UL grant 602 held using U-band transmission can do.
[0095]
　As described above, according to this embodiment, DCI for L-band DCI and U bands are transmitted are arranged in different frequencies of the predetermined control channel region of EPDCCH region and U-band L-band. Also, DL assignments and UL grant included in the DCI for U band is transmitted are arranged at different frequencies in a predetermined control channel region of the U band. Therefore, to reduce the DCI disposed EPDCCH region of the L-band, it is possible to reduce the overhead in EPDCCH.
[0096]
　In the fourth embodiment, an example in which a DL assignment and UL grant included in the DCI for U band is disposed to a different frequency of a given control channel region of the U-band, located in different areas it is possible to obtain the same effect if it is.
[0097]
(Embodiment 5)
　features of embodiment 5 are the same in the U-band and a UL grant indicating transmission permission of the data on the uplink in the DL assignments and U bands indicating allocation of downlink data in the U-band in that arranged in the frequency.
[0098]
　Configuration of a base station apparatus and a terminal apparatus according to the fifth embodiment is the same as the base station apparatus 100 and the terminal device 200 according to the first embodiment, description thereof will be omitted. In the fifth embodiment, the operation of the EPDCCH generator 112 of the base station apparatus 100 is different from the first embodiment.
[0099]
　EPDCCH generation unit 112, a DCI for U-band DCI and L-band are output from the U-band mapping unit 110 and the L-band mapping unit 111, a predetermined control channel region of the EPDCCH region and U-band L-band It is placed within. At this time, EPDCCH generating unit 112 assigns the DCI for L band is mapped REG to subcarriers EPDCCH region of the L-band. Further, EPDCCH generation unit 112, the REG that DCI for U band is mapped, allocated to subcarriers of a predetermined control channel region of the U band. That, EPDCCH generation unit 112 time multiplexes the DL assignments and UL grant in the U-band, is arranged on the same frequency in a predetermined control channel region of the U band.
[0100]
　In the fifth embodiment, while the DCI for L band is arranged in the L-band, DCI U-band is arranged in a U band. In this case, DL assignment and UL grant included in the DCI for U-band is time-multiplexed, are arranged on the same frequency in a predetermined control channel region. Therefore, to reduce the resources used in the EPDCCH license is required L-band, it is possible to reduce overhead. The terminal device, by decoding the DCI for U-band at any one frequency of a predetermined control channel region of the U-band, to grasp the presence of transmission permission allocation position and uplink data downlink can.
[0101]
　Next, a specific example of a subframe structure in a wireless communication system according to the fifth embodiment will be described with reference to FIG. Figure 8 is a diagram showing in time series data to be transmitted using each frequency band of the L-band and U bands. 8, the same reference numerals are given to the same parts as in FIG. 4, and the detailed descriptions thereof are omitted.
[0102]
　In L-band, as in the first embodiment, the DL assignment 302 is transmitted for the three terminals UE # 1 ~ # data 301 data is frequency-multiplexed three addressed and data 301. DL assignment 302 is transmitted is disposed EPDCCH region of the L-band.
[0103]
　On the other hand, the frequency of the predetermined control channel region of the U-band, is transmitted is arranged DCI for U band. Specifically, DL assignment 701 and UL Grant 702 for U-band is time-multiplexed, it is transmitted are located at the same frequency of the predetermined control channel region of the U band. That, DL assignment 701 and UL Grant 702, not the EPDCCH region of the L-band, is arranged in a U band. Terminal UE # 1 ~ # 3, by receiving and decoding the DL assignment 701 for a given control channel region of the U-band, data addressed to the device itself is assigned to which sub-band in U-band respectively it is possible to grasp whether to have. The terminal device UE # 1 ~ # 3, by receiving and decoding the UL grant 702 the predetermined control channel region of the U-band, grasp the presence or absence of authorization data transmission on the uplink using the U band can do.
[0104]
　Thus, in the EPDCCH region of L-band, L-band DCI302 are transmitted are arranged in the predetermined control channel region of the U-band, DL assignment 701 and UL Grant 702 for U band identical They are arranged in the frequency transmission. Therefore, the base station apparatus, for L-band DCI302, advance mapping DL assignments 701 and UL Grant 702 for U band for U-band, in accordance with the carrier sense result, DCI302 only for L-band or you can send the DCI of transmission or both bands. That is, for example, when the carrier sense result U band is not available, the base station apparatus can transmit only DCI302 for L-band. Then, the base station apparatus, temporarily retaining the DL assignment 701 and UL Grant 702 for U band pre mapped, when a vacant U band, the DL assignment 701 and UL Grant 702 held it can be transmitted using the U band.
[0105]
　As described above, according to this embodiment, DCI for L-band DCI and U bands are transmitted are arranged in different frequencies of the predetermined control channel region of EPDCCH region and U-band L-band. Also, DL assignments and UL grant included in the DCI for U band is transmitted are arranged on the same frequency in a predetermined control channel region of the U band. Therefore, to reduce the DCI disposed EPDCCH region of the L-band, it is possible to reduce the overhead in EPDCCH. The terminal device can decode the DL assignments and UL grant from one frequency of the U band.
[0106]
　In the fifth embodiment, an example in which a DL assignment and UL grant included in the DCI for U band are located at the same frequency of the predetermined control channel region of the U-band, the same area it is arranged to be able to obtain the same effect.
[0107]
　Transmission processing of DCI as described in the above embodiments may be for example a base station apparatus 800 having the hardware configuration shown in FIG. 9 is executed. The base station apparatus 800 shown in FIG. 9 includes a radio unit 801, a baseband processor (hereinafter abbreviated as "BB processor") 802, an application processor (hereinafter abbreviated as "AP processor") 803 and a memory 804.
[0108]
　Radio section 801 transmits the radio signal including the DCI through the antenna. The radio section 801 receives a radio signal via an antenna. The wireless unit 801, and perform predetermined radio transmission processing, and executes predetermined radio reception processing. Wireless unit 801 corresponds to, for example, L-band receiver 101 of the base station apparatus 100 shown in FIG. 1, U band receiver 102, L-band transmit unit 117 and the U-band transmission portion 118.
[0109]
　BB processor 802 performs baseband processing for transmitting and receiving the signal. That, BB processor 802, for example, executes the demodulation and encoding and decoding of signals. BB processor 802 may, for example CP removing section 103 and 104 of the base station apparatus 100 shown in FIG. 1, FFT units 105 and 106, the channel separating unit 107, decoding unit 108, U band free determination unit 109, U-band mapping unit 110, corresponding to the L-band mapping unit 111, EPDCCH generator 112, IFFT section 113, 114, and CP adding section 115, 116.
[0110]
　AP processor 803 performs the processing of the application. That, AP processor 803, or to perform processing using the decoded data obtained in the BB processor 802, and executes processing for determining the content of the DCI. Memory 804 stores a data AP processor 803 is used in performing the process.
DESCRIPTION OF SYMBOLS

[0111]
　101, 201 L-band receiver
　102, 202 U band receiver
　103,104,203,204 CP removing section
　105,106,205,206 FFT unit
　107 channel separating unit
　108,207 decoding unit
　109 U band free determination unit
　110 U band for the mapping unit
　111 L-band mapping unit
　112 EPDCCH generator
　113,114,211,212 IFFT unit
　115,116,213,214 CP adding section
　117,215 L-band transmit unit
　118,216 U band transmission unit
　208 scheduler
　209 coding unit
　210 channel multiplexing unit
The scope of the claims

[Claim 1]
　A wireless communication system having a base station apparatus and a terminal apparatus,
　the base station apparatus,
　a first mapping the first control information about the first frequency band where the interference with communication in another wireless communication system does not occur a mapping unit of
　the second mapping unit for mapping the second control information on the second frequency band where the interference may occur with communication in another wireless communication system,
　the first control information and the second a generation unit for generating a control channel signal arrangement to the different regions of the control information,
　a transmission unit for transmitting a control channel signal generated by the generating unit to the terminal device
　wireless communication characterized by having a system.
[Claim 2]
　The base station apparatus,
　comprising the second further determination unit for determining whether the frequency band is free,
　the generator may
　be determined that the empty second frequency band by the judgment section when the said first control information and disposed in said second different area control information for generating a control channel signal, said second frequency band is determined not vacant by the determination unit If, for generating a control channel signal using the first control information
　radio communication system according to claim 1, wherein a.
[Claim 3]
　The second mapping unit,
　wherein when said second frequency band is determined not empty by determining unit, mapped according to claim 2, wherein the retaining the second control information wireless communication system.
[Claim 4]
　The generating unit,
　claims and generating a control channel signal and arranged in different regions of the control channel region of the said first control information second control information the first frequency band wireless communication system of claim 1, wherein.
[Claim 5]
　The generating unit,
　the first control information allocated to the control channel region of the first frequency band, control the second control information arranged to the control channel region of the second frequency band wireless communication system according to claim 1, wherein the generating a channel signal.
[Claim 6]
　The second mapping unit,
　wherein the downlink control information indicating the data assignment of downlink in the second frequency band, the uplink control information indicating the presence or absence of authorization data transmission on the uplink in the second frequency band mapping the door,
　the generation unit
　generates a control channel signal and arranged in different regions and the downlink control information and the region in which the uplink control information the first control information is arranged
　, characterized in that wireless communication system according to claim 1,.
[Claim 7]
　The generation unit
　according to claim 6, characterized in that for generating the downlink control information and the control channel signal and arranged in the same region of the control channel region of the uplink control information of the first frequency band the wireless communication system according.
[8.]
　The generation unit
　according to claim 6, wherein generating a control channel signal and arranged in different regions of the control channel region of the downlink control information and the uplink control information the first frequency band the wireless communication system according.
[Claim 9]
　The generating unit is
　arranged the downlink control information in the control channel region of the first frequency band, the control channel signal to the uplink control information arranged to the control channel region of the second frequency band wireless communication system according to claim 6, wherein generating a.
[Claim 10]
　The generation unit
　according to claim 6, characterized in that for generating the downlink control information and the control channel signal and arranged in the same region of the control channel region of the uplink control information and the second frequency band the wireless communication system according.
[Claim 11]
　The generation unit
　according to claim 6, wherein generating a control channel signal and arranged in different regions of the control channel region of the downlink control information and the uplink control information the second frequency band the wireless communication system according.
[Claim 12]
　A first mapping unit that maps the first control information about the first frequency band where the interference does not occur with the communication in different other wireless communication systems and wireless communication system which the own device belongs,
　the another wireless communication system a second mapping unit for mapping the second control information on the second frequency band where the interference may occur between the communication in,
　placed on the first different area control information and the second control information a generation unit for generating a control channel signal Te,
　a transmission unit for transmitting a control channel signal generated by the generating unit
　base station apparatus characterized by having a.
[Claim 13]
　And first control information for the first frequency band where the interference with the communication in different other wireless communication systems and wireless communication system which the own device belongs does not occur, interference occurs between communications in the other wireless communication system obtaining a receiving unit and the second control information for the second frequency band to receive a control channel signal assigned to the different regions,
　it decodes the control channel signal received by the receiving unit, based on the decoding result a decoding unit for decoding the data received in the first frequency band and said second frequency band
　terminal device characterized by having a.
[Claim 14]
　A transmission method in a base station apparatus belonging to the wireless communication system,
　a first control for the first frequency band where the interference does not occur with the communication in different other wireless communication system with the base station apparatus belongs radio communication system mapping information,
　the interference with communication in another wireless communication system maps the second control information on a second frequency band that may occur,
　together said first control information and the second control information It is placed in different areas to generate a control channel signal,
　and transmits the generated control channel signal
　transmission method characterized by having a process.
Drawing

[ Figure 1]

[Figure 2]

[Figure 3]

[Figure 4]

[Figure 5]

[Figure 6]

[Figure 7]

[Figure 8]

[9]