Entitled base station, a terminal, a wireless communication system, a control method and a control method for a terminal of the base station

Technical field

[0001]

　The present invention relates to a base station, a terminal, a wireless communication system, a control method and a control method of a terminal in the base station.

Background technique

[0002]

　Recently, in wireless communication systems such as cellular telephone systems, in order to further speed-up and large capacity or the like of the wireless communication, discussions have been conducted on the next generation wireless communication technology. For example, in a communication standard called LTE (Long Term Evolution), the carrier of the frequency band requires a license: a (LC Licensed Band Carrier), license unnecessary frequency band carriers: by using the (UC Unlicensed Band Carrier) communication It has been considered a technique for performing. The technique, called the LAA (Licensed Assisted Access).

[0003]

　In LAA, if the terminal performs UL (Up Link) transmitted to the base station in an unlicensed Dobando, the base station, the UL grant for requesting transmission of the data, and transmits to the terminal via the license Dobando. The base station, for example, the terminal before performing the UL transmission, executes the LBT (Listen Before Talk) in unlicensed Dobando. The transmission, when detecting the idle unlicensed Dobando, the base station, for example, in order to ensure the unlicensed Dobando the terminal uses the UL transmission until the timing of UL transmissions of terminals, a reservation signal in an unlicensed Dobando it has been studied to be. Thus, the terminal can perform UL transmission using the unlicensed Dobando from UL grant after a predetermined period of time.

CITATION

Non-patent literature

[0004]

Non-patent Document 1: 3GPP RAN1 Contribution R1-150186

Summary of the Invention

Problems that the Invention is to Solve

[0005]

　Incidentally, in the above non-patent document technology, continues to be busy unlicensed Dobando, if the terminal until the timing of the UL transmission was not received a reservation signal in an unlicensed Dobando, the terminal cancels the example UL transmission . Thus, the transmission opportunity of data to be transmitted in the UL transmission, then the predetermined period from the transmitted UL grant from the base station is to be postponed until after. Therefore, the throughput of data transmission in the uplink from the terminal to the base station may be lowered.

[0006]

　In one aspect, the present invention provides a base station that can improve a decrease in throughput in the uplink, terminal, wireless communication system, a control method and a control method of a terminal in the base station.

Means for Solving the Problems

[0007]

　Base station disclosed in the present application, in one embodiment, dedicated band of the wireless communication system only having a base station and the terminal, and, in the base station to the terminal and the wireless communication using the shared bandwidth to be shared with other systems there are, having a control signal transmission unit, a determination unit, and a permission signal transmission unit. Control signal transmission unit transmits a control signal for instructing the resource in the shared band used for data transmission by the terminal to the terminal. Determination unit determines which one resource in shared bandwidth is idle or busy. Permission signal transmitting unit transmits, when a resource in the shared bandwidth by judging unit is determined to be idle, and transmits a permission signal for permitting transmission of the shared bandwidth. The control signal or enable signal, based on the permission signal transmitted from the permission signal, the terminal includes an offset indicating the time until the start of transmission of data to the base station.

Effect of the Invention

[0008]

　According to one aspect of the present invention, it is possible to improve a decrease in throughput in the uplink.

BRIEF DESCRIPTION OF THE DRAWINGS

[0009]

[1] Figure 1 is a diagram illustrating an example of a wireless communication system.
FIG. 2 is a diagram showing an example of the operation of the wireless communication system in the first embodiment.
FIG. 3 is a diagram showing an example of the operation of the wireless communication system in the first embodiment.
[4] FIG. 4 is a block diagram illustrating an example of a base station.
FIG. 5 is a block diagram showing an example of a terminal.
[6] FIG 6 is a flowchart showing an example of the operation of the base station.
[7] FIG. 7 is a flowchart showing an example of the operation of the base station.
[8] FIG. 8 is a flowchart showing an example of operation of the terminal.
[9] FIG. 9 is a diagram showing an example of the operation of the wireless communication system in the third embodiment.
[10] FIG 10 is a diagram showing an example of the operation of the wireless communication system in the fourth embodiment.
[11] FIG 11 is a diagram showing an example of a wireless communication device that implements the functions of the base station or terminal.

DESCRIPTION OF THE INVENTION

[0010]

　Hereinafter, the base station disclosed in the present application, terminal, wireless communication system, an embodiment of the control method and control method of the terminal of the base station will be described in detail with reference to the drawings. The following examples are not intended to limit the disclosed technique. Further, each embodiment can be combined as appropriate within a range that does not contradict the processing contents.
Example 1

[0011]

[Wireless Communication System 10]
　FIG. 1 is a diagram illustrating an example of a wireless communication system 10. Wireless communication system 10 includes base stations 20, base station 22, and a terminal 30. The base station 20 may perform wireless communication based on LTE. The base station 20 is a eNB (evolved Node B) for example in LTE. Terminal 30 is a UE (User Equipment) for example in LTE. Terminal 30 belongs to the same cell by the base station 20 manages, it communicates with the base station 20 within the cell. In the following description, it may be described a base station 20 and the terminal 30 and the LTE system.

[0012]

　Base station 22, for example, the LTE system base station 20 belongs is a base station belonging to a different system. Base station 22, for example, a base station belonging to the LTE system different operators and LTE systems the base station 20 belongs, or a base station belonging to another communication system such as a wireless LAN system.

[0013]

　The base station 20 uses the first band of the LTE system dedicated base station 20 belongs, and a second band which the base station 20 is shared between the LTE system and other communication systems belonging, terminals in the cell for 30 and wireless communication. First band is, for example, 2GHz band LC (Licensed band Carrier). The second band, for example of the 5GHz band UC (Unlicensed band Carrier). Hereinafter, a first band license Dobando, the second band is referred to as unlicensed Dobando.

[0014]

　In LTE system base station 20 belongs, the first band, for example, assigned to the PCC (Primary Component Carrier), a second band, for example, assigned to the SCC (Secondary Component Carrier). In this embodiment, the first band is a dedicated band of the LTE system base station 20 belongs, the second band is shared by the LTE system base station 20 belongs, a communication system base station 22 belongs that is a shared bandwidth.

[0015]

　Further, in FIG. 1, reference numeral 21, the radio wave transmitted from an arbitrary device, showing the area to reach the base station 20 at an intensity that is determined to be busy by carrier sensing of the base station 20. Further, reference numeral. 23, radio waves transmitted from any device, showing the area to reach the base station 22 at an intensity that is determined by carrier sensing of the base station 22 to be busy.

[0016]

　Base station 20, when requesting a UL transmission using unlicensed Dobando the terminal 30, the UL grant including information on resources used UL transmission, and transmits the license Dobando to the terminal 30. Then, the base station 20 at the timing before the timing of the UL transmission by terminal 30, executes the LBT in unlicensed Dobando. Then, the base station 20, when unlicensed Dobando is determined to be idle, and transmits a permission signal to the unlicensed Dobando. In this embodiment, permission signal is, for example CTS (Clear To Send) signal. By enabling signal is transmitted, the terminal 30 is band Unlicensed Dobando used for UL transmission is reserved for the terminal 30. Terminal 30 which has received the UL grant, when detecting an enable signal in an unlicensed Dobando performs UL transmission using the resources of unlicensed Dobando specified in UL grant.

[0017]

[Operation of Radio Communication System 10]
　Next, with reference to FIGS. 2 and 3, the terminal 30 will be described an example of an operation in the case of performing the UL transmission in unlicensed Dobando in response to an instruction from the base station 20. 2 and 3 are diagrams showing an example of the operation of the wireless communication system 10 according to the first embodiment. Figure 2 is when LBT run by the base station 20 shows a case where idle Unlicensed Dobando is detected, FIG. 3, upon LBT run by the base station 20, a case where busy Unlicensed Dobando is detected shows.

[0018]

　2 and 3, the upper part shows the signal transmitted by using the LC, the lower part shows the signal transmitted by using the UC. Further, in FIGS. 2 and 3, the horizontal axis represents the passage of time, t1 ~ t5 are respectively indicates a period of the sub-frame (e.g., 1 millisecond). Unlicensed Dobando is, for example, is divided into a plurality of sub-bands as shown in FIGS. 2 and 3. In this example, unlicensed Dobando is, for example, 20 MHz, is divided into four sub-bands, for example, every 5 MHz.

[0019]

　The base station 20, for example, as shown in FIG. 2, when the transmission request of data to the terminal 30 has occurred, creating a UL grant 40 to request UL transmission. Then, the base station 20, the UL grant 40 created, transmitted in the license Dobando to the terminal 30. In the example shown in FIG. 2, the base station 20, for example, for each of the five devices 30, in the period of each subframe of t1 ~ t5, and transmits a UL grant 40-1 to 40-5, respectively.

[0020]

　The UL grant 40, identification information, information of the sub-bands include offset, and date information. Identification information included in the UL grant 40 is the same value as the identification information included in the reference made permission signal when the terminal 30 performs UL transmission. Further, the identification information includes a cell ID identifying the cell of the base station 20 to transmit a UL grant 40 and enable signal. The inclusion of a cell ID in the identification information, even if the permission signal by the plurality of base stations 20 is transmitted, the terminal 30 can identify a permission signal for a reference for UL transmission. Cell ID is an example of base station identification information.

[0021]

　Information of the sub-band contained in the UL grant 40 shows a sub-band is a resource Unlicensed Dobando used when the terminal 30 performs UL transmission. Further, the offset contained in the UL grant 40 indicates the time from enable signal to UL transmission start. In this embodiment, the offset is specified in units of the sub-frame for example in LTE. The deadline information included in the UL grant 40 shows a deadline for terminal 30 awaits permission signal. In this embodiment, expiration information is, for example, based on the subframe UL grant 40 is transmitted, is specified for each subframe. In the present embodiment, the time limit specified by date information, for example UL grant 40 is a timing after 10 subframes from subframes transmitted.

[0022]

　The base station 20, when to perform UL transmission to each terminal 30 in successive subframes, the identification information included in each of the UL grant 40 to the same value. Further, the base station 20, when to perform UL transmission to each terminal 30 in successive subframes, the offset included in the UL grant 40 to be transmitted to each terminal 30, by a predetermined time (e.g., time of one subframe) shifting.

[0023]

　In the example shown in FIG. 2, the UL grant 40-1, for example, included as a value of "1" is offset indicating that perform UL transmission in subframe after one sub-frame in which permission signal is transmitted It is. Similarly, the UL grant 40-5, for example, a value of "5" indicating that perform UL transmission in five sub-frames after the sub-frame enable signal is transmitted is included as offset.

[0024]

　Then, the base station 20 after a predetermined time from the transmission of the UL grant 40 (for example, after 3 subframes), executes the LBT in unlicensed Dobando. Then, to detect the idle unlicensed Dobando, if the period 41 of the back-off, the continuation of the idle state is confirmed, the base station 20 transmits a grant signal 42 to all of the subbands in Unlicensed Dobando. The enabling signal 42 includes identification information for identifying the respective enabling signal 42. Enabling signal 42 is, for example, the transmission period 43 after the end of the SIFS (Short Inter Frame Space) are lengths permission signal 42 is the timing of the boundary between the sub-frame and the next sub-frames transmitted enabling signal 42 in is sent to the unlicensed Dobando.

[0025]

　Terminal 30, when receiving the UL Grant 40 license Dobando, identification information, information of a sub-band, to obtain an offset, and a time limit information from the UL grant 40. Further, when receiving the permission signal 42 in unlicensed Dobando, terminal 30 obtains the identification information from the enabling signal 42. Then, the terminal 30, based on the reception timing of the enable signal 42, after a time specified has elapsed offset obtained from the UL grant 40, using the sub-band of Unlicensed Dobando specified in UL grant 40 carry out the UL transmission of the signal 44.

[0026]

　In the example shown in FIG. 2, the terminal 30 that has received the UL grant 40-1 including the offset value of "1", for example, sub-frame one frame after the period t4 subframes permission signal 42 is sent It performs UL transmission signal 44-1 in the period t5. Similarly, the terminal 30 that has received the UL grant 40-5 including the offset value of "5", for example, the signal in the period t9 subframe after five from time t4 subframes permission signal 42 is sent carry out the UL transmission of 44-5.

[0027]

　For example, as shown in FIG. 3, in the period t4 after a predetermined time from the transmission of the UL grant 40, if the other signals 45 to unlicensed Dobando is being transmitted, the base station 20, the Unlicensed Dobando by LBT to detect busy. Then, the base station 20, to continue the LBT in unlicensed Dobando. For example, as shown in FIG. 3, when detecting the idle unlicensed Dobando in the period t5, the base station 20 checks the period 46, the idle continuation of DIFS (Distributed coordination function Inter Frame Space). If continuation of the idle state is confirmed in the period 46, the base station 20 transmits after confirming continuity of the period 41, the idle state of the back-off, the enabling signal 42 to the unlicensed Dobando.

[0028]

　Each terminal 30, based on the reception timing of the enable signal 42, after the time specified in the offset obtained from the UL Grant 40 has passed, respectively, signals in an unlicensed Dobando subbands specified in UL Grant 40 44 perform the UL transmission of. Thus, the timing of UL transmissions of signals 44-1 to 44-5 by each of the terminal 30, for example, as shown by the arrow in FIG. 3, the minute transmission is delayed enabling signal 42, generally be displaced backwards become.

[0029]

　Here, when the busy Unlicensed Dobando is detected at the timing of the LBT, the base station 20 stops transmission of the permission signal 42, if retransmits the UL grant 40, the predetermined time from the next UL grant 40 until after, UL transmission is postponed. Thus, the throughput decreases in uplink data transmission.

[0030]

　In contrast, the base station 20 of the present embodiment, even if the busy Unlicensed Dobando is detected by LBT, continued LBT, if idle Unlicensed Dobando is detected, enabling signal to the unlicensed Dobando 42 to send. Thus, the terminal 30, without UL grant 40 is retransmitted, based on the timing at which the enable signal 42 is transmitted, it is possible to perform UL transmission. Therefore, the wireless communication system 10, it is possible to improve the throughput of data in the uplink from terminal 30 to base station 20. Further, it is possible to suppress the retransmission of the UL grant, it is possible to suppress the traffic control signal in the license Dobando.

[0031]

　The base station 20, when to perform UL transmission to each terminal 30 in successive subframes, based on one of the enabling signal 42 to adjust the offset that specifies the timing of UL transmissions of each terminal 30. Thus, depending on the transmission timing of the enable signal 42, which may better enable signal 42 is transmitted before the UL grant 40. Therefore, each terminal 30 before receiving the UL grant 40 in the license Dobando awaits reception of the permission signal 42 in unlicensed Dobando. Each terminal 30, when receiving both UL grant 40 and enable signal 42, based on the timing of enable signal 42 is transmitted at the timing specified by the offset of the UL Grant 40 performs UL transmission .

[0032]

[Base station 20]
　FIG. 4 is a block diagram illustrating an example of a base station 20. The base station 20 includes a packet generation unit 200, MAC (Media Access Control) scheduling section 201, MAC controller 202, and an RRC (Radio Resource Control) controller 203. Further, the base station 20 has a MAC · RLC (Radio Link Control) processing unit 204, judgment unit 205 and the measurement unit 206. Further, the base station 20, unlicensed Dobando transmitting unit 210, a license Dobando transmission unit 220, unlicensed Dobando receiver 230, the license Dobando receiver 240, antenna 216, antenna 226, antenna 235, and an antenna 245. In the present embodiment, the antenna 216, antenna 226, antenna 235, and antenna 245 is realized by the separate antennas, as another example, these antennas may be realized by a single antenna.

[0033]

　License Dobando receiver unit 240 performs processing to decode data from a signal received in the license Dobando. License Dobando receiver 240 includes a decoder 241, demodulator 242, FFT processing section 243 and the wireless processing unit 244,.

[0034]

　The radio processing section 244 performs radio processing signals received via the antenna 245. A wireless processing performed by the wireless processing unit 244, include, for example, processing for converting the frequency of the received signal from the frequency of the license Dobando to the frequency of the baseband. The radio processing unit 244 outputs the received signal by the radio processing is performed to the FFT processing unit 243.

[0035]

　FFT processor 243 performs an FFT (Fast Fourier Transform) processing on the received signal outputted from the radio processing unit 244. Thus, the received signal frequency-converted to baseband from the license Dobando is transformed from the time domain to the frequency domain. FFT processing section 243 outputs the received signal FFT processing has been performed to the demodulator 242.

[0036]

　Demodulation unit 242 demodulates the received signal outputted from the FFT processing unit 243. Then, demodulation unit 242 outputs the received signal after demodulation to decoding section 241. Decoding unit 241 decodes the received signal output from the demodulator 242. Then, the decoding unit 241 outputs the decoded data to the MAC · RLC processing section 204.

[0037]

　Unlicensed Dobando receiving unit 230 performs processing to decode data from a signal received at an unlicensed Dobando. Unlicensed Dobando receiver 230 includes a decoder 231, demodulator 232, FFT processor 233 and radio processor 234,.

[0038]

　The radio processing section 234 performs radio processing signals received via the antenna 235. A wireless processing performed by the wireless processing unit 234, include, for example, processing for converting the frequency of the received signal from the frequency of the unlicensed Dobando to the frequency of the baseband. The radio processing unit 234 outputs the received signal by the radio processing is performed to the FFT processor 233.

[0039]

　FFT processor 233 performs FFT processing on the received signal outputted from the radio processing unit 234. Thus, the received signal frequency-converted to baseband from unlicensed Dobando is transformed from the time domain to the frequency domain. FFT processing section 233 outputs a received signal FFT processing is performed to the demodulation unit 232 and the measurement unit 206.

[0040]

　Demodulation unit 232 demodulates the received signal outputted from the FFT processing unit 233. Then, demodulation unit 232 outputs the received signal after demodulation to decoding section 231. Decoding unit 231 decodes the received signal output from the demodulator 232. Then, the decoding unit 231 outputs the decoded data to the MAC · RLC processing section 204.

[0041]

　Measuring unit 206 based on the reception signals outputted from the FFT processing unit 233 measures the interference power in the unlicensed Dobando. The measuring unit 206 outputs the measurement result of the interference power to the determination unit 205.

[0042]

　Determination unit 205 determines based on the outputted measurement results from the measurement unit 206, which one unlicensed Dobando is idle or busy. Then, the determination unit 205 outputs the determination result to the MAC control unit 202.

[0043]

　MAC · RLC processing unit 204 performs the processing in the processing and RLC layer in MAC layer based on the data output from the decoding unit 231 and the decoding unit 241. MAC · RLC processing section 204, the data obtained by the processing of each layer, and outputs for example to the upper device of the base station 20. Further, MAC · RLC processing section 204 outputs the control information included in the data obtained by the processing of each layer to the RRC control unit 203.

[0044]

　RRC control unit 203 performs radio resource control on the basis of the control information output from the MAC · RLC processing section 204. Radio resource control performed by the RRC control unit 203 is a processing of the RRC layer. RRC control unit 203 generates control information based on a radio resource control, and outputs the generated control information to the MAC control unit 202.

[0045]

　MAC controller 202 controls the MAC layer based and control information output from the RRC control unit 203, to the determination result output from the determination unit 205. Then, MAC control unit 202 generates control information based on the control of the MAC layer, and outputs the generated control information to the MAC scheduling section 201.

[0046]

　Further, MAC controller 202, when the transmission request of data to the terminal 30 has occurred, creating a UL grant for requesting UL transmission. Then, MAC control unit 202, a UL grant that was created, and outputs to the multiplexing unit 223 to be described later.

[0047]

　Further, MAC controller 202, when the transmission request of data to the terminal 30 is generated, before the timing of UL transmissions, based on the determination result output from the determination unit 205 executes the LBT in unlicensed Dobando . Then, when detecting the idle unlicensed Dobando, MAC controller 202 generates a grant signal, and outputs the generated permission signal to the multiplexing unit 213.

[0048]

　Packet generation unit 200 generates a packet including the user data output from the device of higher. The packet generation unit 200 outputs the generated packet to the MAC scheduling section 201.

[0049]

　MAC scheduling section 201 based on the control information output from the MAC control unit 202 performs scheduling in the MAC layer with respect to the packet output from the packet generation unit 200. Then, MAC scheduling section 201, the output of the Unlicensed Dobando transmission section 210 or licensed Dobando transmission unit 220 of the packet the packet generation unit 200 has generated is controlled based on the scheduling results.

[0050]

　License Dobando transmitting unit 220 performs a process for transmitting data in a license Dobando. License Dobando transmission section 220 includes an encoding unit 221, modulation unit 222, multiplexing section 223, IFFT (Inverse Fast Fourier Transform) processing unit 224 and the wireless processing unit 225,.

[0051]

　Encoding unit 221 encodes the data of the packet output from the MAC scheduling section 201. The encoding unit 221 outputs the data of the encoded packet to the modulation section 222. Modulation unit 222 modulates the data output from the coding section 221. Then, modulation section 222, and outputs the modulated signal to multiplexing section 223.

[0052]

　Multiplexing section 223 multiplexes the control signal of the UL grant or the like output from the MAC controller 202, and a signal output from the modulation unit 222. Then, multiplexing section 223 outputs the transmission signal multiplexed to the IFFT processing unit 224.

[0053]

　IFFT processor 224 performs IFFT processing on the transmission signal outputted from multiplexing section 223. Thus, the transmission signal output from the multiplexing section 223 is converted from the frequency domain to the time domain. IFFT processing section 224 outputs the transmission signal after IFFT processing to the radio processor 225.

[0054]

　The radio processing section 225 performs radio processing on the transmission signal outputted from the IFFT processing unit 224. The radio processing performed by the wireless processing unit 225, include, for example, processing for converting the frequency of the transmission signal from the frequency of the baseband to the frequency of the license Dobando. The radio processing unit 225 transmits the transmission signal after radio processing from antenna 226.

[0055]

　The unlicensed Dobando transmitting unit 210 performs a process for transmitting data in a unlicensed Dobando. Unlicensed Dobando transmitting unit 210 has a coding section 211, modulation section 212, multiplexing section 213, IFFT processing section 214 and the wireless processing unit 215,.

[0056]

　Encoding unit 211 encodes the data of the packet output from the MAC scheduling section 201. The encoding unit 211 outputs the data of the encoded packet to the modulation section 212. Modulation unit 212 modulates the data of the packet output from the coding unit 211. Then, modulation section 212, and outputs the modulated signal to multiplexing section 213.

[0057]

　Multiplexing section 213 multiplexes a signal, such as permission signal output from the MAC controller 202, and a signal output from the modulation unit 212. Then, multiplexing section 213 outputs a transmission signal multiplexed to the IFFT processing unit 214.

[0058]

　IFFT processor 214 performs IFFT processing on the transmission signal outputted from multiplexing section 213. Thus, the transmission signal output from the multiplexing section 213 is converted from the frequency domain to the time domain. IFFT processing section 214 outputs the transmission signal after IFFT processing to the wireless processing unit 215.

[0059]

　The radio processing unit 215, performs radio processing on the transmission signal outputted from the IFFT processing unit 214. The radio processing performed by the wireless processing unit 215, include, for example, processing for converting the frequency of the transmission signal from the frequency of the baseband to the frequency of the unlicensed Dobando. The radio processing unit 215 transmits the transmission signal after radio processing from antenna 216.

[0060]

Terminal 30]
　FIG. 5 is a block diagram showing an example of a terminal 30. Terminal 30 includes an antenna 300, decoding section 301, RRC processing unit 304, the uplink management unit 305, encoding and modulating unit 306 and the packet generation unit 307,. The terminal 30 has a license Dobando receiver 310, unlicensed Dobando receiver 320, unlicensed Dobando transmitting unit 330 and the license Dobando transmitting unit 340.

[0061]

　In the present embodiment, the terminal 30 has one antenna 300. However, as another example, the antenna 300, the license Dobando receiver 310, each of Unlicensed Dobando receiver 320, unlicensed Dobando transmitting unit 330, and the license Dobando transmission unit 340, may be provided separately.

[0062]

　License Dobando receiver 310 performs a process of demodulating the data from the signal received in the license Dobando. License Dobando receiver 310 includes a radio processing section 311, FFT processing section 312, the equalization processing section 313, IFFT section 314 and demodulation section 315,.

[0063]

　The radio processing section 311 performs radio processing on the signal received via the antenna 300. A wireless processing performed by the wireless processing unit 311, include, for example, processing for converting the frequency of the received signal from the frequency of the license Dobando to the frequency of the baseband. The radio processing unit 311 outputs the received signal after radio processing to FFT processing section 312.

[0064]

　FFT processor 312 performs FFT processing on the received signal outputted from the radio processing unit 311. Thus, the received signal outputted from the radio processing unit 311 is transformed from the time domain to the frequency domain. FFT processing section 312 outputs the received signal after FFT processing to the equalization processing section 313. Equalizing processing section 313 performs equalization processing on the signal output from the FFT processor 312. The equalization processing section 313 outputs the received signal after the equalization processing to IFFT processing section 314.

[0065]

　IFFT processor 314 performs IFFT processing on the received signals output from the equalization processing unit 313. Thus, the received signal outputted from the equalization processing unit 313 is converted from the frequency domain to the time domain. IFFT processing section 314 outputs the received signal after the IFFT processing to demodulation section 315.

[0066]

　Demodulation unit 315 demodulates the received signal output from the IFFT processor 314. Then, demodulation unit 315 outputs the received signal after demodulation to decoding section 301. License The data decoded from the received signal demodulated by the Dobando receiver 310 includes a control signal such as a UL grant.

[0067]

　Unlicensed Dobando receiver 320 performs a process of demodulating the data from the signal received in the unlicensed Dobando. Unlicensed Dobando receiver 320 includes a radio processing section 321, FFT processing section 322, the equalization processing section 323, IFFT section 324 and demodulation section 325,.

[0068]

　The radio processing section 321 performs radio processing on the signal received via the antenna 300. A wireless processing performed by the wireless processing unit 321 include, for example, processing for converting the frequency of the received signal from the frequency of the unlicensed Dobando to the frequency of the baseband. The radio processing unit 321 outputs the received signal after radio processing to FFT processing section 322.

[0069]

　FFT processor 322 performs FFT processing on the received signal outputted from the radio processing unit 321. Thus, the received signal outputted from the radio processing unit 321 is transformed from the time domain to the frequency domain. Then, the FFT processing section 322 outputs the received signal after FFT processing to the equalization processing section 323. Equalizing processing section 323 performs equalization processing of received signals outputted from the FFT processing unit 322. The equalization processing section 323 outputs the received signal after the equalization processing to IFFT processing section 324.

[0070]

　IFFT processor 324 performs IFFT processing on the received signal outputted from the equalization processing unit 323. Thus, the received signal outputted from the equalization processing unit 323 is converted from the frequency domain to the time domain. IFFT processing section 324 outputs the received signal after the IFFT processing to demodulation section 325.

[0071]

　Demodulation unit 325 demodulates the received signal outputted from the IFFT processing unit 324. Then, demodulation unit 325 outputs the received signal after demodulation to decoding section 301. The data decoded from the received signal demodulated by the unlicensed Dobando receiver 320 includes a control signal such as a permission signal.

[0072]

　Decoding unit 301 decodes the user data and control signals from the received signal output from the license Dobando receiver 310 and unlicensed Dobando receiver 320. Then, the decoding unit 301, the user data after decoding, and outputs for example the application processing unit that performs processing based on the received data (not shown). Further, the decoding unit 301, a control signal after the decoding, and outputs it to the RRC processing unit 304 and an uplink management unit 305. The control signal is output to the uplink management unit 305 includes a UL grant and permission signal.

[0073]

　RRC processing section 304 performs radio resource control based on the control signal outputted from the decoding unit 301. Radio resource control performed by the RRC processing unit 304 is a processing of the RRC layer. RRC processing unit 304 generates control information based on a radio resource control, and outputs the generated control information to the uplink management unit 305.

[0074]

　Uplink management unit 305 controls the UL transmissions based and control information output from the RRC processing unit 304, a control signal outputted from the decoding unit 301. Uplink management unit 305, for example, if the UL grant from the decoding unit 301 is outputted from the UL grant, the identification information, information of a sub-band of unlicensed Dobando acquires offset, and the time limit information. Further, the uplink management unit 305, if the permission signal from the decoding unit 301 is output, acquires the identification information included in the permission signal.

[0075]

　Further, the uplink management unit 305, if the permission signal including the acquired with the identification information from the UL grant is detected in unlicensed Dobando, from the detection permission signal, included in the UL grant offset corresponding to determines whether the elapsed time. If the time corresponding to the offset from the detection of the grant signal has elapsed, the uplink management unit 305 outputs a control signal such as a DMRS to multiplexing section 335 and multiplexing section 345.

[0076]

　Further, the uplink management unit 305 outputs to the frequency mapping unit 333 and frequency mapping unit 343 will be described later allocation information of the resource used in the UL transmission. Further, the uplink management unit 305, when the time indicated by the offset from the detection of the grant signal has elapsed, instructs the encoding and modulating unit 306 to be described later UL transmission.

[0077]

　Packet generation unit 307 generates a packet including the user data output for example from the application processing unit (not shown). The packet generation unit 307 outputs the generated packet to the coding and modulation unit 306. Encoding and modulating unit 306 performs processing for encoding and modulation on the packet output from the packet generation unit 307. The encoding and modulation unit 306, a transmission signal processing of the coding and modulation is performed in response to an instruction from the uplink management unit 305, output to the unlicensed Dobando transmission section 330 or licensed Dobando transmission unit 340 to.

[0078]

　License Dobando transmitting unit 340 performs a process for transmitting data in a license Dobando. License Dobando transmitting unit 340 includes a radio processing section 341, IFFT processor 342, frequency mapping section 343, FFT processing section 344 and multiplexing section 345,.

[0079]

　Multiplexing section 345 multiplexes a control signal output from the uplink management unit 305, and a transmission signal output from the coding and modulation unit 306. Then, multiplexing section 345 outputs the transmission signal after multiplexing to the FFT processing unit 344. FFT processor 344 performs FFT processing on the transmission signal outputted from multiplexing section 345. Thus, the transmission signal output from the multiplexing unit 345 is transformed from the time domain to the frequency domain. FFT processing section 344 outputs the transmission signal after FFT processing to the frequency mapping unit 343.

[0080]

　Frequency mapping unit 343, based on the resource allocation information used for the UL transmission output from the uplink management unit 305 performs frequency mapping to the transmission signals output from the FFT processor 344. The frequency mapping unit 343 outputs the transmission signal after frequency mapping to the IFFT processing unit 342.

[0081]

　IFFT processor 342 performs IFFT processing on the transmission signal outputted from the frequency mapping unit 343. Thus, the transmission signal output from the frequency mapping unit 343 is converted from the frequency domain to the time domain. IFFT processing section 342 outputs the transmission signal after IFFT processing to the wireless processing unit 341.

[0082]

　The radio processing section 341 performs radio processing on the transmission signal outputted from the IFFT processing unit 342. The radio processing performed by the wireless processing unit 341, include, for example, processing for converting the frequency of the transmission signal from the frequency of the baseband to the frequency of the license Dobando. The radio processing unit 341 transmits the transmission signal after radio processing via the antenna 300.

[0083]

　Unlicensed Dobando transmitting unit 330 performs a process for transmitting data in a unlicensed Dobando. Unlicensed Dobando transmitting unit 330 includes a radio processing section 331, IFFT processor 332, frequency mapping section 333, FFT processing section 334 and multiplexing section 335,.

[0084]

　Multiplexing section 335 multiplexes a control signal output from the uplink management unit 305, and a signal output from the coding and modulation unit 306. Then, multiplexing section 335 outputs the transmission signal after multiplexing to the FFT processing unit 334. FFT processor 334 performs FFT processing on the transmission signal outputted from multiplexing section 335. Thus, the transmission signal output from the multiplexing unit 335 is transformed from the time domain to the frequency domain. FFT processing section 334 outputs the transmission signal after FFT processing to the frequency mapping unit 333.

[0085]

　Frequency mapping unit 333, based on the resource allocation information used for the UL transmission output from the uplink management unit 305 performs frequency mapping to the transmission signals output from the FFT processor 334. The frequency mapping unit 333 outputs the transmission signal after frequency mapping to the IFFT processing unit 332.

[0086]

　IFFT processor 332 performs IFFT processing on the transmission signal outputted from the frequency mapping unit 333. Thus, the transmission signal output from the frequency mapping unit 333 is converted from the frequency domain to the time domain. IFFT processing section 332 outputs the transmission signal after IFFT processing to the wireless processing unit 331.

[0087]

　The radio processing section 331 performs radio processing on the transmission signal outputted from the IFFT processing unit 332. The radio processing performed by the wireless processing unit 331, include, for example, processing for converting the frequency of the transmission signal from the frequency of the baseband to the frequency of the unlicensed Dobando. The radio processing unit 331 transmits the transmission signal after radio processing via the antenna 300.

[0088]

[Operation of the base station 20]
　Next, the operation of the base station 20. 6 and 7 are flowcharts showing an example of the operation of the base station 20.

[0089]

　First, MAC controller 202 of the base station 20, initializes a variable i (S100). Then, MAC controller 202 determines whether or not the transmission request data to the terminal 30 is generated (S101). When the transmission request of the data to the terminal 30 occurs (S101: Yes), MAC controller 202 determines whether the UL transmission is instructed are all terminated or canceled by the UL grant including the i-1 in the identification information to (S102).

[0090]

　The i-1 in the UL transmission instructed by the UL grant including the identification information, if there are remaining UL transmissions are not also be canceled ended (S102: No), MAC controller 202, the variable j 1 increase (S105). Then, MAC control unit 202 creates an offset j indicating that the value of the offset is j, the identification information including a i-1 and the cell ID, and UL grant and a time limit information. Then, MAC control unit 202 instructs the license Dobando transmission unit 220 to transmit the UL grant created in the license Dobando to the terminal 30 (S106). Then, MAC control unit 202 executes again the process shown in step S101.

[0091]

　If UL transmission the i-1 indicated by the UL grant including the identification information is all finished or canceled (S102: Yes), MAC controller 202, initializes a variable j (S103). Then, MAC control unit 202 creates an offset j, the identification information including a i and cell ID, and UL grant and a time limit information. Then, MAC control unit 202 instructs the license Dobando transmission unit 220 to transmit the UL grant created in the license Dobando to the terminal 30 (S104).

[0092]

　Then, MAC control unit 202, from the transmission of the UL grant predetermined time (e.g., 3 sub-frame time) is equal to or has passed (S107 in FIG. 7). If from the transmission of the UL grant predetermined time has elapsed (S107: Yes), MAC control unit 202 determines by executing the LBT in unlicensed Dobando, whether unlicensed Dobando Do idling (S108) .

[0093]

　If unlicensed Dobando is idle (S108: Yes), MAC control unit 202 creates a permission signal including the identification information including i and cell ID. Then, MAC control unit 202 instructs the unlicensed Dobando transmitting unit 210, the permission signal generated, is transmitted to the unlicensed Dobando (S109). Then, MAC controller 202, the variable i is incremented by 1 (S110), executes the process of step S101 shown in FIG. 6 again.

[0094]

　If from the transmission of the UL grant predetermined time has not elapsed (S107: No), or when unlicensed Dobando is busy (S108: No), MAC control unit 202, transmission request data to the terminal 30 It is equal to or has occurred (S 111). When the transmission request of the data to the terminal 30 occurs (S111: Yes), MAC controller 202, the variable j increase 1 (S112). Then, MAC control unit 202 creates an offset j, the identification information including a i and cell ID, and UL grant and a time limit information. Then, MAC control unit 202 instructs the license Dobando transmission unit 220, a UL grant that was created, is sent in the license Dobando to the terminal 30 (S113). Then, MAC control unit 202 executes again the process shown in step S107.

[0095]

　Also, if the transmission request of data to the terminal 30 has not occurred (S111: No), MAC controller 202 identifies the UL grant corresponding to the UL transmission unexecuted. Then, MAC controller 202 determines from the transmission of the specified UL grant, whether elapsed time limit indicated by time limit information (S114). If the deadline has not elapsed (S114: No), MAC control unit 202 executes again the process shown in step S107.

[0096]

　From the transmission of the UL grant, if the deadline indicated by the period information has elapsed (S114: Yes), MAC control unit 202 cancels the data transmission request instruction to the terminal 30 in the UL grant (S115), step S110 process is executed as shown in.

[0097]

　Here, the base station 20, as described above, if in the UL transmission instructed by Sent UL grant, there remain UL transmissions are not also be canceled ended (S102: No), i- transmitting a UL grant including one identification information (S106). Thus, the base station 20, the terminal 30, it is possible to use the grant signal already containing the transmitted identification information of the i-1 in step S107. Thus, the base station 20 uses less permission signal, it is possible to perform a number of UL transmission to the terminal 30.

[0098]

Operation of the terminal 30]
　Next, the operation of the terminal 30. Figure 8 is a flowchart showing an example of operation of the terminal 30.

[0099]

　First, the uplink management unit 305 determines whether it has received the UL grant in the license Dobando (S200). When receiving the UL grant (S200: Yes), the uplink management unit 305, the UL grant, the identification information, offset, and the time limit information obtaining (S201).

[0100]

　Next, the uplink management unit 305 determines whether it has received the permission signal including with the identification information contained in the UL grant (S202). Note that permission signal may be received before the UL grant. When receiving the permission signal including the same identification information as the identification information included in the UL grant (S202: Yes), the uplink management unit 305, the reception timing of permission signal, represented by an offset obtained from the UL grant It is to wait until the time has elapsed (S203).

[0101]

　Next, the uplink management unit 305 instructs the allocation information for the specified resource in the UL grant to the unlicensed Dobando transmitting unit 330. Then, the uplink management unit 305, by instructing the UL transmission to the encoding and modulation unit 306 performs UL transmission by using the resource specified by the UL grant (S204). Then, the uplink management unit 305 executes again the process shown in step S200.

[0102]

　Further, when having not received the permission signal including the same identification information as the identification information included in the UL grant (S202: No), the uplink management unit 305, indicated by the acquired date information from the UL grant It determines whether or not the deadline has passed (S205). If the deadline has not elapsed (S205: No), the uplink management unit 305 executes again the process shown in step S202. On the other hand, if the time limit has passed (S205: Yes), the uplink management unit 305 cancels the UL transmission instructed by the UL grant, and performs the processing shown again in step S200. By canceling the UL transmission period has elapsed, it is possible to avoid an increase in power consumption of the terminal 30 due to continue waiting for permission signal.

[0103]

　It has been described above in Example 1. As apparent from the above description, according to the wireless communication system 10 of the present embodiment, it is possible to improve a decrease in throughput in the uplink.
Example 2

[0104]

　In Example 1 described above, the base station 20, the UL grant 40, and sends the license Dobando to the terminal 30. In contrast, in Example 2, the base station 20, the UL grant 40, and transmits the unlicensed Dobando to the terminal 30. However, in the unlicensed Dobando, each communication apparatus is transmitted from the detection of the idle bandwidth are performed. Therefore, in the second embodiment, the base station 20, when the transmission request of data to the terminal 30 is generated, executes the LBT in unlicensed Dobando, the UL grant 40 from the detection of the vacant bandwidth to the terminal 30 Send.
Example 3

[0105]

　In Example 1 described above, the base station 20 as a result of LBT performed before transmission of the permission signal, if the busy Unlicensed Dobando is detected, the transmission of the permission signal to the idle Unlicensed Dobando is detected put off. However, in the unlicensed Dobando, want when data transmission is performed in DL from the base station 20 to the terminal 30 (Down Link). If the DL data transmission is being performed at the unlicensed Dobando, but unlicensed Dobando is busy, the signal the base station 20 transmits to the terminal 30 can be the base station 20 creates. Accordingly, in this embodiment, the transmission timing of the enable signal, if the data transmitted from the base station 20 to the terminal 30 is performed, and transmits the multiplexing permission signal in the same subframe. Accordingly, even when the DL data transmission is performed in an unlicensed Dobando, the base station 20 may notify a grant signal to the terminal 30.

[0106]

　Incidentally, if the DL data transmission is performed in an unlicensed Dobando, the base station 20, enabling signal to one of a plurality of control channels are multiplexed in the same subframe as the data transmission to the terminal 30 include. Control channel, for example, a PDCCH (Physical Downlink Control CHannel) or ePDCCH (enhanced PDCCH) or the like. Further, the base station 20, all terminals 30 subordinate, in order to be able to receive the PDCCH or ePDCCH indicating permission signal, in the common search space (Common Search Space), notifying the permission signal.

[0107]

[Operation of the wireless communication system 10]
　FIG. 9 is a diagram showing an example of the operation of the wireless communication system 10 according to the third embodiment. For example, as shown in FIG. 9, in the sub-frame period t4 after a predetermined time from the transmission of the UL grant 40-1, if the other signals 45 to unlicensed Dobando is being transmitted, the base station 20 is unlicensed by LBT to detect the busy of Dobando. Then, the base station 20 defers transmission of the permission signal.

[0108]

　On the other hand, the base station 20 to transmit the DL data to one of the terminals 30 under the sub-frame period t5, executes LBT of unlicensed Dobando. For example, as shown in FIG. 9, when detecting the idle unlicensed Dobando in the period t4, the base station 20 for a period of DIFS 46, to confirm the continuation of the idle state. If the period 46 continues the idle state is confirmed, the base station 20, after confirming a random backoff period 41, the idle state continuation, and transmits the DL data 47 to unlicensed Dobando in subframe period t5 .

[0109]

　At this time, the base station 20 to one of a plurality of control channels 48 that are multiplexed on the DL data 47 to be transmitted in sub-frame period t5, and transmits to the unlicensed Dobando including permission signal. PDCCH for example, the control channel 48 is transmitted in symbols from the beginning of the sub-frame a predetermined number (e.g., from the beginning up to 3 symbols) to.

[0110]

　Each terminal 30 that receives the control channel 48 in the unlicensed Dobando detects a permission signal from the control channel 48. Each terminal 30, based on the sub-frames detected permission signal, after the time specified in the offset obtained from the UL Grant 40 has elapsed, the signal in an unlicensed Dobando subbands specified in UL grant 40 It performs the transmission of 44-1 to 44-4. Thus, the base station 20, without waiting for transmission of the permission signal until the transmission of the DL data is completed, it is possible to transmit a grant signal in subframe DL data is transmitted. Thus, each terminal 30 may initiate a UL transmission after the end transmission of DL data, it is possible to improve throughput in uplink data transmission.

[0111]

　The control signals such as DL assignment indicating a resource allocation or the like of the DL data is transmitted, for example, using one of the multiplexed control channels to the DL data in unlicensed Dobando. As another example, control signals such as DL assignments, for example, the control channels transmitted in the same subframe and the DL data in the license band may be transmitted to each terminal 30 with.
Example 4

[0112]

　In Example 3 described above, the base station 20 is permitted in the transmission timing of the enable signal, if the transmission of the DL data is performed unlicensed Dobando, the control channel multiplexed in the same subframe and the DL data including the signal. In contrast, the base station 20 of this embodiment, the transmission timing of the enable signal, if the transmission of the DL data is performed unlicensed Dobando, in the sub-frame including a transmission timing of the enable signal, enable signal license Dobando to send. In this embodiment, permission signal is transmitted, for example, using one of the control channel transmitted in the license Dobando. Control channel, for example, a PDCCH or ePDCCH like.

[0113]

[Operation of the wireless communication system 10]
　FIG 10 is a diagram showing an example of the operation of the wireless communication system 10 in the fourth embodiment. Note that except for the points described below, in FIG. 10, elements denoted by the same reference numerals as in FIG. 9 is similar to the elements described in FIG. 3, a detailed description thereof will be omitted.

[0114]

　The base station 20 executes the LBT in the sub-frame period t4, when detecting the idle unlicensed Dobando, transmits the DL data 47 to unlicensed Dobando in the sub-frame period t5. The DL data 47, a plurality of control channels 48 that contains the control signal, such as a DL assignment has been multiplexed. Further, the base station 20, the sub-frame period t5 that DL data is transmitted, transmits the permission signal to each terminal 30 with one of the control channel 49 to be transmitted by the license Dobando.

[0115]

　License Each terminal 30 that receives the control channel 49 in Dobando detects a permission signal from the control channel 49. Each terminal 30, based on the sub-frames detected permission signal, after the time specified in the offset obtained from the UL Grant 40 has elapsed, the signal in an unlicensed Dobando subbands specified in UL grant 40 It performs the transmission of 44-1 to 44-4. In this embodiment, the base station 20, without waiting for transmission of the permission signal until the transmission of the DL data is completed, it is possible to transmit a grant signal in subframe DL data is transmitted, the uplink it is possible to improve throughput in data transmission.

[0116]

[Hardware]
　base station 20 and the terminal 30 in each of the aforementioned embodiments can be implemented by the wireless communication apparatus 70 shown in FIG. 11 for example. Figure 11 is a diagram showing an example of a wireless communication device 70 for realizing the functions of the base station 20 or the terminal 30. Wireless communication device 70, for example, a memory 71, a processor 72, analog-to-digital converter (A / D) 73, a multiplier 74, an amplifier 75, an oscillator 76, a digital-to-analog converter (D / A) 77, a multiplier 78, amplifier 79, and an antenna 80. The wireless communication device 70, in addition, may include an interface for performing wired communication with an external communication device.

[0117]

　Antenna 80 receives a radio signal, and outputs the received signal to the amplifier 75. The antenna 80 transmits the signal output from the amplifier 79 to the outside. Amplifier 75 amplifies the signal antenna 80 is received, and outputs the amplified signal to the multiplier 74. The multiplier 74, a signal output from the amplifier 75, by multiplying the clock signal outputted from the oscillator 76, converts the frequency of the received signal from the RF band to the baseband. Then, the multiplier 74 outputs a frequency-converted signal to analog-to-digital converter 73. Analog-to-digital converter 73, the analog reception signal outputted from the multiplier 74 into a digital reception signal, and outputs the received signal after conversion to the processor 72.

[0118]

　The processor 72 controls the entire wireless communication device 70. The processor 72 may be realized by, for example, a CPU (Central Processing Unit) and DSP (Digital Signal Processor). The processor 72 performs reception processing of signals output from the analog-digital converter 73. The processor 72 generates a transmission signal, and outputs the generated transmission signal to the digital-to-analog converter 77.

[0119]

　The memory 71 may include, for example, main memory and auxiliary memory. The main memory is, for example, RAM (Random Access Memory). The main memory is used as a work area of ​​processor 72. Auxiliary memory is, for example, a nonvolatile memory such as a magnetic disk or a flash memory. The auxiliary memory, various programs for operating the processor 72 is stored. Program stored in the auxiliary memory is executed by the processor 72 is loaded into the main memory.

[0120]

　Digital-to-analog converter 77 converts the digital transmission signal output from the processor 72 into an analog transmission signal, and outputs the transmission signal after the conversion to the multiplier 78. The multiplier 78, the transmission signal converted by the digital-to-analog converter 77, by multiplying the clock signal outputted from the oscillator 76, converts the frequency of the transmitted signal from the baseband to the RF band. Then, the multiplier 78 outputs the transmission signal obtained by frequency conversion to the amplifier 79. Amplifier 79 amplifies the signal output from the multiplier 78, and transmits the transmission signal after amplification to the outside via the antenna 80.

[0121]

　Oscillator 76 generates a predetermined frequency of the clock signal (AC signal of a continuous wave). Then, the oscillator 76 outputs the generated clock signal to the multiplier 74 and the multiplier 78.

[0122]

　If the wireless communication device 70 functions as a base station 20 shown in FIG. 4, antenna 216,226,235, and 245 shown in FIG. 4 can be realized by, for example, the antenna 80. The radio processing unit 215,225,234, and 244 shown in FIG. 4, for example, analog-to-digital converter 73, a multiplier 74, an amplifier 75, an oscillator 76, a digital-to-analog converter 77, a multiplier 78, and an amplifier 79 it can be realized by. Further, other configuration shown in FIG. 4 can be realized by, for example, a processor 72 and memory 71.

[0123]

　If the wireless communication device 70 functions as a terminal 30 shown in FIG. 5, the antenna 300 shown in FIG. 5 may be realized by, for example, the antenna 80. The radio processing unit 311, 321, 331, and 341 shown in FIG. 5, for example, analog-to-digital converter 73, a multiplier 74, an amplifier 75, an oscillator 76, a digital-to-analog converter 77, a multiplier 78, and an amplifier 79 it can be realized by. Further, other configuration shown in FIG. 5 may be realized by, for example, a processor 72 and memory 71.

[0124]

[Others]
　In each of the above-mentioned embodiments, although each UL grant includes an offset, as another example, the offset may be included in the permission signal. In this case, the permission signal, in association with the respective identification information of the destination terminal 30 of UL grant transmitted and before the transmission of the permission signal, the offset used by the terminal 30 is stored.

[0125]

　Further, in each embodiment described above, the UL grant, the terminal 30 in response to the UL grant includes the identification information of the identification information and the same value included in the reference become permission signal for performing UL transmission. However, the disclosed technology is not limited to this. For example, the like when the terminal 30 for receiving a permission signal from only one base station 20, the UL grant may not contain identifying information of the same value as the identification information included in the permission signal .

[0126]

　Note that the components shown in each embodiment described above, in order to facilitate understanding of the devices, in which classified by function in accordance with the main processing content. Therefore, by segment method and the name of the components, it does not disclose the technology is limited. Configuration of each apparatus shown in the above embodiment, depending on the processing contents, further can either be divided into a number of components, it can be classified as one component to perform the more processing . Further, each process may be implemented as a processing by software, ASIC may be implemented by (Application Specific Integrated Circuit) dedicated hardware or the like.

DESCRIPTION OF SYMBOLS

[0127]

20 the base station
200 the packet generation unit
201 MAC scheduling section
202 MAC controller
203 RRC control unit
204 MAC · RLC processing unit
205 determination unit
206 measuring unit
210 Unlicensed Dobando transmitting unit
211 coding unit
212 modulation unit
213 multiplexing unit
214 IFFT processing part
215 radio processing unit
216 antenna
220 license Dobando transmitting unit
221 coding unit
222 modulation unit
223 multiplexing unit
224 IFFT unit
225 radio unit
226 antenna
230 unlicensed Dobando receiver
231 decoding unit
232 demodulation unit
233 FFT processing unit
234 wirelessly processing unit
235 antenna
240 license Dobando receiver
241 decoding unit
242 demodulation unit
243 FFT processing unit
244 radio unit
245 antenna

The scope of the claims

[Claim 1]

　Dedicated band of the wireless communication system only having a base station and the terminal, and, at the base station to the terminal and the radio communication using the shared bandwidth to be shared with other systems,
　the shared used for data transmission by the terminal a control signal transmission unit transmitting a control signal for instructing the resource in the band to the terminal,
　and a determination unit that determines which of the resource is idle or busy in said shared bandwidth,
　the shared bandwidth by the determination unit If the resources inside is determined to be idle, and permission signal transmission unit for transmitting a permission signal for permitting transmission in the shared bandwidth
　has,
　in the control signal or said enabling signal,
　said enabling signal as basis of the permission signal transmitted from the transmitting unit, Oh indicating the time from the permission signal, to said terminal starts transmitting data to the base station Base station, characterized in that contains a set.

[Claim 2]

　The enable signal transmitter unit,
　identification information for identifying each of said permission signal, included in the permission signal,
　the control signal transmission unit,
　said permission signal by the terminal of destination of the control signal is a reference for the offset the base station of claim 1, the same identification information as the identification information included, is characterized in that included in the control signal to.

[Claim 3]

　The identification information,
　the base station according to claim 2, characterized in that includes base station identification information that identifies the base station.

[Claim 4]

　It said control signal transmission unit,
　the base station according to claim 1, wherein the terminal is a time limit information indicating a time limit to wait for reception of the permission signal, and wherein further be included in the control signal.

[Claim 5]

　The offset
　base station according to claim 1, characterized in that it is specified in units of subframes in LTE (Long Term Evolution).

[Claim 6]

　Dedicated band of the wireless communication system only having a base station and the terminal, and, in the terminal that wirelessly communicates with the base station using a shared bandwidth to be shared with other systems,
　resources in said shared bandwidth is idle permission signal transmitted from the base station when, and, a receiver for receiving control information for instructing the resource in said shared bandwidth used for data transmission to the base station,
　the instructed by the control signal using resources in a shared band, a transmission unit for transmitting data to the base station
　has,
　wherein the control signal or the enable signal,
　as a reference the permission signal transmitted from the base station, the authorization includes the offset indicating a time from the signal to the start of transmission of data to the base station,
　and the transmission unit,
　the from the reception unit receives the permission signal Terminal when the time indicated by the offset has elapsed, using the resources in the shared band instructed by the control signal, and transmits the data to the base station.

[Claim 7]

　Wherein the enable signal and the control signal includes the identification information,
　and the transmission unit,
　a permission signal same identification information as the identification information included in the control signal addressed to its own terminal is included received from the terminal according to claim 6, wherein said transmit data to the base station after the time indicated by the offset has elapsed.

[8.]

　Wherein the identification information includes
　terminal according to claim 7, characterized in that includes base station identification information that identifies the base station.

[Claim 9]

　Wherein the control signal
　period information indicating a time limit to wait for reception of the permission signal are further included,
　and the transmission unit,
　until the expiration date indicated by the date information included in the control signal addressed to its own terminal to, if not receiving the permission signal, terminal of claim 6, characterized in that to cancel the data transmission to the base station.

[Claim 10]

　The offset
　terminal according to claim 6, characterized in that it is specified in units of subframes in LTE.

[Claim 11]

　And a base station and a terminal, and the base station and the terminal, in a wireless communication system for wireless communication using the shared bandwidth to be shared with the host system only dedicated band and other systems,
　the base station,
　a control signal transmission unit transmitting a control signal for instructing the resource in said shared bandwidth used for data transmission by the terminal to the terminal,
　determining determines whether the resource in said shared bandwidth is either idle or busy and parts,
　if the resource in said shared bandwidth by the determination unit is determined to be idle, and permission signal transmission unit for transmitting a permission signal for permitting transmission in the shared bandwidth
　has,
　the control signal or the the permission signal
　based the permission signal transmitted from the enable signal transmitter unit, from said permission signal, the transmission the terminal data to the base station Contains an offset that indicates the time until the start,
　the terminal may
　: a receiving unit that receives the control signal and the enabling signal,
　the time the receiver is indicated by the offset from the reception of the permission signal has elapsed later, a transmission unit using the resources of the control signal within said shared bandwidth instructed by, and transmits data to the base station
　radio communication system characterized by having a.

[Claim 12]

　Dedicated band of the wireless communication system only having a base station and a terminal, and the base station to the terminal and the radio communication using the shared bandwidth to be shared with other systems,
　the shared used for data transmission by the terminal a control signal for instructing the resource in the band and transmits to the terminal,
　the resource in said shared bandwidth it is determined whether it is idle or busy,
　when the resources of said shared bandwidth is determined to be idle , transmits a permission signal for permitting transmission in the shared bandwidth
　to execute processing,
　wherein the control signal or the enable signal,
　as a reference the permission signal transmitted from the permission signal, the terminal the base control method for a base station, characterized in that it includes an offset indicating the time until the start of transmission of the data to the station.

[Claim 13]

　Dedicated band of the wireless communication system only having a base station and a terminal and, said terminal that wirelessly communicates with the base station using a shared bandwidth to be shared with other systems,
　resources in said shared bandwidth is idle permission signal transmitted from the base station when, and to receive the control information instructing the resource in said shared bandwidth used for data transmission to the base station,
　the control signal at the indicated said shared bandwidth using the resource, and transmits the data to the base station
　performs a process,
　wherein the control signal or the enable signal,
　as a reference the permission signal transmitted from said base station, said base station from said permission signal contains an offset that indicates the time until the start of transmission of data to,
　the process of transmitting the data,
　shown in the offset from the reception of the permission signal When the time has elapsed, by using the resources of the control signal within said shared bandwidth instructed, the control method of a terminal and transmits the data to the base station.