Wireless communication system, wireless communication device, and wireless communication method

Abstract

A communication system is provided with: a first wireless communication device for time-division transmission of a plurality of first reference signals, the directivity of which is controlled, in a first period; and a second wireless communication device that performs time-division transmission to the first wireless communication device in a second period with respect to a plurality of second reference signals, the directivity of which is controlled. The plurality of second reference signals include information on directivity corresponding to any one of the first reference signals received from the first wireless communication device.

Description

[0001] This application is a divisional application of the invention patent application with the application date of July 17, 2020, the application number of 202080052843.X, and the invention title of "Wireless Communication System, Wireless Communication Device, and Wireless Communication Method". Technical Field

[0002] The present disclosure relates to a wireless communication system, a wireless communication device, and a wireless communication method. Background Art

[0003] For example, as a system using a frequency of 52.6 GHz or higher, there is a communication system using the 60 GHz band.

[0004] As a communication method for extending the communication distance, there is the method described in Patent Document 1. Fig.63 An example of the communication state of the wireless communication device described in Patent Document 1 is shown.

[0005] For example, the wireless communication device 001 transmits a signal for sector scanning. Then, the wireless communication device 051 transmits a signal for sector scanning. Next, the wireless communication device 051 transmits a signal including feedback information related to the sector scanning to the wireless communication device 001.

[0006] Through this process, the wireless communication device 001 determines the method of "transmit beamforming and / or receive beamforming", and in addition, the wireless communication device 051 also determines the method of "transmit beamforming and / or receive beamforming". Thus, the communication distance between the wireless communication device 001 and the wireless communication device 051 can be extended, but there are still problems in improving the data transmission efficiency of the entire communication system composed of multiple wireless communication devices in an environment where there are multiple wireless communication devices.

[0007] Prior Art Documents

[0008] Patent Documents

[0009] Patent Document 1: Japanese Patent Application Laid-Open No. 2018-518855 Summary of the Invention

[0010] Problems to be Solved by the Invention

[0011] The non-limiting embodiments of the present disclosure contribute to providing a technology for improving the data transmission speed in the case where there are multiple wireless communication devices.

[0012] Solutions to the Problems

[0013] One aspect of the wireless communication system of the present disclosure includes: a first wireless communication device that performs time-division transmission of a plurality of first reference signals with controlled directivity within a first period; and a second wireless communication device that performs time-division transmission to the first wireless communication device within a second period of a plurality of second reference signals with controlled directivity, the plurality of second reference signals including information regarding directivity corresponding to one of the first reference signals received from the first wireless communication device.

[0014] One aspect of the wireless communication device of the present disclosure includes: a reception processing unit that receives a plurality of first reference signals with directivity controlled by another wireless communication device within a first period; and a transmission processing unit that performs time-division transmission to the other wireless communication device within a second period of a plurality of second reference signals with controlled directivity, the plurality of second reference signals including information regarding directivity corresponding to one of the first reference signals.

[0015] One aspect of the wireless communication device of the present disclosure includes: a transmission processing unit that performs time-division transmission of a plurality of first reference signals with controlled directivity within a first period; and a reception processing unit that receives at least one of the plurality of second reference signals within a second period, the plurality of second reference signals including information regarding directivity corresponding to one of the first reference signals and having directivity controlled by another wireless communication device that has received the first reference signal.

[0016] In a wireless communication method according to one aspect of the present disclosure, a first wireless communication device performs time-division transmission of a plurality of first reference signals with controlled directivity within a first period; and a second wireless communication device performs time-division transmission to the first wireless communication device within a second period of a plurality of second reference signals with controlled directivity, the plurality of second reference signals including information regarding directivity corresponding to one of the first reference signals received from the first wireless communication device.

[0017] These general or specific aspects may be implemented by a system, a device, a method, an integrated circuit, a computer program, or a recording medium, or may be implemented by any combination of a system, a device, a method, an integrated circuit, a computer program, and a recording medium.

[0018] Advantageous Effects of the Invention

[0019] According to a non-limiting embodiment of the present disclosure, the data transmission speed is increased in the case where there are a plurality of wireless communication devices.

[0020] Further advantages and effects in one aspect of the present disclosure will be clearly presented by the specification and the accompanying drawings. These advantages and / or effects are provided by several embodiments and the features described in the specification and the accompanying drawings respectively, but it is not necessarily required to provide all of them in order to obtain one or more of the same features. Description of the Drawings

[0021] Figure 1A FIG. 1 is a diagram showing a first example of the structure of the communication device according to Embodiment 1.

[0022] Figure 1B FIG. 2 is a diagram showing a second example of the structure of the communication device according to Embodiment 1.

[0023] Figure 1C FIG. 3 is a diagram showing a third example of the structure of the communication device according to Embodiment 1.

[0024] Figure 2 FIG. 4 is a diagram showing a structural example of the i-th transmission unit according to Embodiment 1.

[0025] Figure 3 FIG. 5 is a diagram showing a structural example of the transmission panel antenna i according to Embodiment 1.

[0026] Figure 4 FIG. 6 is a diagram showing a structural example of the reception panel antenna i according to Embodiment 1.

[0027] Figure 5 FIG. 7 is a diagram showing a structural example of the transmission device when using the single-carrier method based on DFT (Discrete Fourier Transform) according to Embodiment 1.

[0028] Figure 6 FIG. 8 is a diagram showing a structural example of the reception device when using the single-carrier method based on DFT according to Embodiment 1.

[0029] Figure 7 FIG. 9 is a diagram showing a structural example of the transmission device when using the single-carrier method based on the time domain according to Embodiment 1.

[0030] Figure 8 FIG. 10 is a diagram showing a structural example of the reception device when using the single-carrier method based on the time domain according to Embodiment 1.

[0031] Fig. 9 FIG. 11 is a diagram showing an example of the communication state according to Embodiment 1.

[0032] Fig.10 FIG. 12 is a diagram showing an example of the modulation signal transmitted by the base station according to Embodiment 1.

[0033] Fig.11This is a diagram showing an example of a sector scan reference signal transmitted by the base station according to Embodiment 1.

[0034] Fig.12 This is a diagram showing a structural example of the "sector scan reference signal in transmission panel antenna i" according to Embodiment 1.

[0035] Fig.13 This is a diagram showing an example of the operation of the terminal response interval according to Embodiment 1.

[0036] Fig.14 This is a diagram showing a first example related to the occupancy of the terminal in the "sector scan reference signal" transmission interval for the terminal according to Embodiment 1.

[0037] Fig.15 This is a diagram showing a structural example of the "sector scan reference signal in transmission panel antenna xi" according to Embodiment 1.

[0038] Fig.16 This is a diagram showing a structural example of the feedback signal in the time interval from t2 to t3 according to Embodiment 1.

[0039] Fig.17 This is a diagram showing a structural example of a frame including data symbols in the time interval from t4 to t5 according to Embodiment 1.

[0040] Fig.18 This is a diagram showing an example of the situation when the base station and the terminal communicate according to Embodiment 1.

[0041] Fig.19 This is a diagram showing the situation when the base station and the terminal communicate according to Embodiment 1 Fig.18 of a subsequent example.

[0042] Fig. 20 This is a diagram showing a structural example of the "frame including data symbols" transmitted by the terminal according to Embodiment 1.

[0043] Fig.21 This is a diagram showing a second example related to the occupancy of the terminal in the "sector scan reference signal" transmission interval for the terminal according to Embodiment 1.

[0044] Fig. 22 This is a diagram showing a third example related to the occupancy of the terminal in the "sector scan reference signal" transmission interval for the terminal according to Embodiment 1.

[0045] Fig.23 This is a diagram showing an example of the modulation signal transmitted by the base station according to Embodiment 2.

[0046] Fig.24 This is a diagram showing a structural example of a feedback signal group in the time interval from t2 to t3 according to Embodiment 2.

[0047] Fig.25 This is a diagram showing a structural example of a frame group including data symbols in the time interval t4 to t5 in Embodiment 2.

[0048] Fig.26 This is a diagram showing an example of the situation when the base station and the terminal communicate in Embodiment 2.

[0049] Fig. 27 This is a diagram showing the Fig.26 subsequent example of the situation when the base station and the terminal communicate in Embodiment 2.

[0050] Fig.28 This is a diagram showing a structural example of the "frame group including data symbols" transmitted by the terminal in Embodiment 2.

[0051] Fig.29 This is a diagram showing an example of the communication state in Embodiment 3.

[0052] Fig.30 This is a diagram showing an example of the modulation signal transmitted by the base station in Embodiment 3.

[0053] Fig.31A This is a diagram showing a structural example of a feedback signal group in the time interval t2 to t3 in Embodiment 3.

[0054] Fig.31B This is a diagram showing a structural example of a feedback signal group in the time interval t2 to t3 in Embodiment 3.

[0055] Fig.31C This is a diagram showing a structural example of a feedback signal group in the time interval t2 to t3 in Embodiment 3.

[0056] Fig.31D This is a diagram showing a structural example of a feedback signal group in the time interval t2 to t3 in Embodiment 3.

[0057] Fig.32A This is a diagram showing a structural example of a frame group including data symbols in the time interval t4 to t5 in Embodiment 3.

[0058] Fig.32B This is a diagram showing a structural example of a frame group including data symbols in the time interval t4 to t5 in Embodiment 3.

[0059] Fig.32C This is a diagram showing a structural example of a frame group including data symbols in the time interval t4 to t5 in Embodiment 3.

[0060] Fig.32DIt is a diagram showing a structural example of a frame group including data symbols in the time interval t4 to t5 in Embodiment 3.

[0061] Fig.33 It is a diagram showing an example related to the occupancy of a terminal in the "sector scan reference signal" transmission interval of a terminal in Embodiment 3.

[0062] Fig.34A It is a diagram showing another example of a structural example of a feedback signal group in the time interval t2 to t3 in Embodiment 3.

[0063] Fig.34B It is a diagram showing another example of a structural example of a feedback signal group in the time interval t2 to t3 in Embodiment 3.

[0064] Fig.34C It is a diagram showing another example of a structural example of a feedback signal group in the time interval t2 to t3 in Embodiment 3.

[0065] Fig.34D It is a diagram showing another example of a structural example of a feedback signal group in the time interval t2 to t3 in Embodiment 3.

[0066] Fig.35A It is a diagram showing another example of a structural example of a frame group including data symbols in the time interval t4 to t5 in Embodiment 3.

[0067] Fig.35B It is a diagram showing another example of a structural example of a frame group including data symbols in the time interval t4 to t5 in Embodiment 3.

[0068] Fig.35C It is a diagram showing another example of a structural example of a frame group including data symbols in the time interval t4 to t5 in Embodiment 3.

[0069] Fig.35D It is a diagram showing another example of a structural example of a frame group including data symbols in the time interval t4 to t5 in Embodiment 3.

[0070] Fig.36 It is a diagram showing a structural example of a "frame group including data symbols" transmitted by a terminal in Embodiment 3.

[0071] Fig.37A It is a diagram showing a modified example of a structural example of a frame group including data symbols in the time interval t4 to t5 in Embodiment 3.

[0072] Fig.37B It is a diagram showing a modified example of a structural example of a frame group including data symbols in the time interval t4 to t5 in Embodiment 3.

[0073] Fig.37C It is a diagram showing a modified example of the structure example of a frame group including data symbols in the time interval t4 to t5 in Embodiment 3.

[0074] Fig.37D It is a diagram showing a modified example of the structure example of a frame group including data symbols in the time interval t4 to t5 in Embodiment 3.

[0075] Fig.38 It is a diagram showing the first example of the structure example of "modulated signal (time slot) sent to the i-th terminal" in Embodiment 4.

[0076] Fig.39A It is a diagram showing the first example of the structure example of "frame or frame group" in Embodiment 4.

[0077] Fig.39B It is a diagram showing the second example of the structure example of "frame or frame group" in Embodiment 4.

[0078] Fig.40 It is a diagram showing an example of the communication state in Embodiment 5.

[0079] Fig.41 It is a diagram showing an example related to the occupation of the terminal in the "sector scanning reference signal" transmission interval for the terminal in Embodiment 5.

[0080] Fig.42A It is a diagram showing the structure example of the feedback signal group in the time interval t2 to t3 in Embodiment 5.

[0081] Fig.42B It is a diagram showing the structure example of the feedback signal group in the time interval t2 to t3 in Embodiment 5.

[0082] Fig.42C It is a diagram showing the structure example of the feedback signal group in the time interval t2 to t3 in Embodiment 5.

[0083] Fig.42D It is a diagram showing the structure example of the feedback signal group in the time interval t2 to t3 in Embodiment 5.

[0084] Fig.43A It is a diagram showing the structure example of a frame group including data symbols in the time interval t4 to t5 in Embodiment 5.

[0085] Fig.43B It is a diagram showing the structure example of a frame group including data symbols in the time interval t4 to t5 in Embodiment 5.

[0086] Fig.43CThis is a diagram showing an example of the structure of a frame group containing data symbols in the time interval from t4 to t5 in Embodiment 5.

[0087] Fig.43D This is a diagram showing an example of the structure of a frame group containing data symbols in the time interval from t4 to t5 in Embodiment 5.

[0088] Fig.44 This is a diagram showing an example of the structure of a "frame group containing data symbols" transmitted by the terminal in Embodiment 5.

[0089] Fig.45A This is a diagram showing a modified example of the structure of a frame group containing data symbols in the time interval from t4 to t5 in Embodiment 5.

[0090] Fig.45B This is a diagram showing a modified example of the structure of a frame group containing data symbols in the time interval from t4 to t5 in Embodiment 5.

[0091] Fig.45C This is a diagram showing a modified example of the structure of a frame group containing data symbols in the time interval from t4 to t5 in Embodiment 5.

[0092] Fig.45D This is a diagram showing a modified example of the structure of a frame group containing data symbols in the time interval from t4 to t5 in Embodiment 5.

[0093] Fig.46A This is a diagram showing an example of the structure of a communication system in Embodiment 6.

[0094] Fig.46B This is a diagram showing an example of the structure of a communication system in Embodiment 6 that is Fig.46A different from

[0095] Fig.47 This is a diagram showing an example of the structure of a terminal in Embodiment 6.

[0096] Fig.48 This is a diagram showing an example of the structure of a base station in Embodiment 6.

[0097] Fig.49A This is a diagram showing an example of the structure of a base station in Embodiment 6.

[0098] Fig.49B This is a diagram showing an example of the structure of a base station in Embodiment 6.

[0099] Fig.50A This is a diagram showing an example of the transmission status from time t0 to time t5 in Embodiment 6.

[0100] Fig.50BThis is a diagram showing an example of the transmission status from time t0 to time t5 in Embodiment 6.

[0101] Fig.50C This is a diagram showing an example of the transmission status from time t0 to time t5 in Embodiment 6.

[0102] Fig.51 This is a diagram showing an example of the PUCCH of the terminal in Embodiment 6.

[0103] Fig.52 This is a diagram showing an example of the frame structure in Embodiment 6.

[0104] Fig.53 This is a diagram showing an example of the frame structure in Embodiment 6.

[0105] Fig.54 This is a diagram showing an example when the terminal in Embodiment 6 transmits a sector scan signal.

[0106] Fig.55 This is a diagram illustrating an example of the modulation signal of the first frequency transmitted by the terminal in Embodiment 6.

[0107] Fig.56A This is a diagram showing a modification example of the communication system in Embodiment 6.

[0108] Fig.56B This is a diagram showing a modification example of the communication system in Embodiment 6.

[0109] Fig.56C This is a diagram showing a modification example of the communication system in Embodiment 6.

[0110] Fig.56D This is a diagram showing a modification example of the communication system in Embodiment 6.

[0111] Fig.57 This is a diagram showing an example of the transmission status in Embodiment 6.

[0112] Fig.58 This is a diagram showing an example of the transmission status in Embodiment 6.

[0113] Fig.59 This is a diagram showing an example of the reception status from time s1 to time s6 in Embodiment 6.

[0114] Fig.60 This is a diagram showing an example of the data contained in the modulation signal transmitted using the second frequency (frequency band) in Embodiment 6.

[0115] Fig.61 This is a diagram showing an example of the data contained in the modulation signal transmitted using the second frequency (frequency band) in Embodiment 6.

[0116] Fig.62A It is a diagram showing an example of the reception status from time s1 to time s6 in Embodiment 6.

[0117] Fig.62B It is a diagram showing an example of the reception status from time s1 to time s6 in Embodiment 6.

[0118] Fig.63 It is a diagram showing an example of the sector scan reference signal transmitted by the base station in Embodiment 7.

[0119] Fig.64 It is a diagram showing a structural example of the sector scan reference signal in Embodiment 7.

[0120] Fig.65 It is a diagram showing a structural example of the sector scan reference signal in Embodiment 7.

[0121] Fig.66 It is a diagram showing an example of the communication state of the prior art wireless communication device.

[0122] Explanation of reference numerals

[0123] 100 Control signal

[0124] 101_i The i-th data

[0125] 102_i The i-th transmitting unit

[0126] 103_i The i-th modulation signal

[0127] 104 The first processing unit

[0128] 105_j The j-th transmission signal

[0129] 106_j Transmission panel antenna j

[0130] 151_i Reception panel antenna i

[0131] 152_i The i-th reception signal

[0132] 153 The second processing unit

[0133] 154 The signal after the j-th signal processing

[0134] 155_j The j-th receiving unit

[0135] 156_j The j-th control data

[0136] 157_j The j-th data

[0137] 158 The third processing unit

[0138] 200 Control signal

[0139] 201 data

[0140] 202 Data symbol generation unit

[0141] 203 Modulation signal of data symbol

[0142] 204 Sector scan reference signal generation unit

[0143] 205 Sector scan reference signal

[0144] 206 Other signal generation unit

[0145] 207 Other signals

[0146] 251 Processing unit

[0147] 252 Modulation signal compliant with frame structure

[0148] 300 Control signal

[0149] 301 Transmission signal

[0150] 302 Allocation unit

[0151] 303_1 First transmission signal

[0152] 303_2 Second transmission signal

[0153] 303_3 Third transmission signal

[0154] 303_4 Fourth transmission signal

[0155] 304_1, 304_2, 304_3, 304_4 Multiplication units

[0156] 305_1 First transmission signal multiplied by a coefficient

[0157] 305_2 Second transmission signal multiplied by a coefficient

[0158] 305_3 Third transmission signal multiplied by a coefficient

[0159] 305_4 Fourth transmission signal multiplied by a coefficient

[0160] 306_1, 306_2, 306_3, 306_4 Antennas

[0161] 400 Control signal

[0162] 401_1, 401_2, 401_3, 401_4 Antennas

[0163] 402_1 First received signal

[0164] 402_2 Second received signal

[0165] 402_3 The 3rd received signal

[0166] 402_4 The 4th received signal

[0167] 403_1, 403_2, 403_3, 403_4 Multiplication units

[0168] The 1st received signal after being multiplied by a coefficient by 404_1

[0169] The 2nd received signal after being multiplied by a coefficient by 404_2

[0170] The 3rd received signal after being multiplied by a coefficient by 404_3

[0171] The 4th received signal after being multiplied by a coefficient by 404_4

[0172] 405 Coupling / combining unit

[0173] 406 Modulation signal

[0174] 501 Constellation mapper

[0175] 502 Tone mapping

[0176] 503 IFFT

[0177] 504 CP insertion unit

[0178] 505 Transmit FE processing unit

[0179] 601 Receive FE processing unit

[0180] 602 CP removal unit

[0181] 603 FFT

[0182] 604 Tone demapping

[0183] 605 FDE

[0184] 606 DFT

[0185] 607 Demapper

[0186] 701 Constellation mapper

[0187] 702 CP insertion unit

[0188] 703 Upsampling and pulse shaping

[0189] 704 Transmit FE processing unit

[0190] 801 Receive FE processing unit

[0191] 802 Downsampling and matched filtering

[0192] 803 TDE

[0193] 804 CP Removal Unit

[0194] 805 Demapper

[0195] 901_1 Base Station #1

[0196] 902_1 Terminal #1

[0197] 902_2 Terminal #2

[0198] 902_3 Terminal #3

[0199] 1000 Modulated Signal

[0200] 1001 Sector Scanning Reference Signal

[0201] 1002 Feedback Signal

[0202] 1003 Frame Containing Data Symbols

[0203] 1101_i Sector Scanning Reference Signal in Transmission Panel Antenna i

[0204] 1101_xi Sector Scanning Reference Signal in Transmission Panel Antenna xi

[0205] 1201_j Reference Signal Using the j-th Parameter in Transmission Panel Antenna i

[0206] 1301_1 Transmission Interval of "Sector Scanning Reference Signal" for the First Terminal

[0207] 1301_2 Transmission Interval of "Sector Scanning Reference Signal" for the Second Terminal

[0208] 1301_3 Transmission Interval of "Sector Scanning Reference Signal" for the Third Terminal

[0209] 1301_4 Transmission Interval of "Sector Scanning Reference Signal" for the Fourth Terminal

[0210] 1401_1, 1401_2, 2101_3, 2201_3 Sector Scanning Reference Signals

[0211] 1501_j Reference Signal Using the j-th Parameter in Transmission Panel Antenna xi

[0212] 1601_1 Feedback Signal Sent to the First Terminal

[0213] 1601_2 Feedback Signal Sent to the Second Terminal

[0214] 1601_3 Feedback Signal Sent to the Third Terminal

[0215] Feedback signal sent to the 4th terminal by 1601_4

[0216] Modulation signal sent to the 1st terminal by 1701_1, 3201_11, 3201_21, 3201_31, 3201_41 (time slot sent to the 1st terminal)

[0217] Modulation signal sent to the 2nd terminal by 1701_2, 3201_12, 3201_22, 3201_32, 3201_42 (time slot sent to the 2nd terminal)

[0218] Modulation signal sent to the 3rd terminal by 1701_3, 3201_13, 3201_23, 3201_33, 3201_43 (time slot sent to the 3rd terminal)

[0219] Modulation signal sent to the 4th terminal by 1701_4, 3201_14, 3201_24, 3201_34, 3201_44 (time slot sent to the 4th terminal)

[0220] Reference signals for sector scanning by 1801_1, 1801_2, 3301_1, 3301_2, 3301_3, 3301_4, 3301_5, 3301_6, 4101_1, 4101_2, 4101_3

[0221] Feedback signals by 1802_1, 1802_2

[0222] Frames containing data symbols by 1803_1, 1803_2, 1803_3, 1803_4

[0223] Reference signals for sector scanning by 1851_1, 1851_2

[0224] Frames containing data symbols by 1852_1, 1852_2, 1852_3, 1852_4

[0225] Frames by 2001_1, 2001_2

[0226] Modulation signals by 2300, 3000

[0227] Feedback signal groups by 2302, 3002

[0228] Groups of frames containing data symbols by 2303, 3003

[0229] Feedback signal groups sent to the 1st terminal by 2400_1, 3101_11, 3101_21, 3101_31, 3101_41

[0230] Feedback signal groups sent to the 2nd terminal by 2400_2, 3101_12, 3101_22, 3101_32, 3101_42

[0231] Feedback signal groups of 2400_3, 3101_13, 3101_23, 3101_33, 3101_43 sent to the 3rd terminal

[0232] Feedback signal groups of 2400_4, 3101_14, 3101_24, 3101_34, 3101_44 sent to the 4th terminal

[0233] Feedback signal (1) of 2401_1 sent to terminal #1

[0234] Feedback signal (2) of 2401_2 sent to terminal #1

[0235] Feedback signals of 2402_1, 3401_2, 4201_2 sent to terminal #2

[0236] Modulation signal group (time slot group sent to the 1st terminal) of 2500_1 sent to the 1st terminal

[0237] Modulation signal group (time slot group sent to the 2nd terminal) of 2500_2 sent to the 2nd terminal

[0238] Modulation signal group (time slot group sent to the 3rd terminal) of 2500_3 sent to the 3rd terminal

[0239] Modulation signal group (time slot group sent to the 4th terminal) of 2500_4 sent to the 4th terminal

[0240] Modulation signal (time slot) (1) of 2501_1 sent to terminal #1

[0241] Modulation signal (time slot) (2) of 2501_2 sent to terminal #1

[0242] Modulation signals (time slots) of 2502_1, 3501_2, 4301_2 sent to terminal #2

[0243] Feedback signal groups of 2602_1, 2602_2

[0244] Frame groups of 2603_1, 2603_2, 2603_3, 2603_4, 2652_1, 2652_2, 2652_3, 2652_4, 2652_i containing data symbols

[0245] Frame groups of 2801_1, 2801_2, 3601_1, 3601_2, 3601_3, 3601_4, 3601_5, 3601_6, 4401_1, 4401_2, 4401_3

[0246] 2904_4 Terminal #4

[0247] 2904_5 Terminal #5

[0248] 2904_6 Terminal #6

[0249] 3100_1 Feedback signal of transmitting panel antenna 1

[0250] 3100_2 Feedback signal of transmitting panel antenna 2

[0251] 3100_3 Feedback signal of transmitting panel antenna 3

[0252] 3100_4 Feedback signal of transmitting panel antenna 4

[0253] 3200_1 Frame of transmitting panel antenna 1

[0254] 3200_2 Frame of transmitting panel antenna 2

[0255] 3200_3 Frame of transmitting panel antenna 3

[0256] 3200_4 Frame of transmitting panel antenna 4

[0257] 3401_1, 4201_1 Feedback signal sent to Terminal #1

[0258] 3401_3, 4201_3 Feedback signal sent to Terminal #3

[0259] 3401_4 Feedback signal sent to Terminal #4

[0260] 3401_5 Feedback signal sent to Terminal #5

[0261] 3401_6 Feedback signal sent to Terminal #5

[0262] 3501_1, 4301_1 Modulation signal (time slot) sent to Terminal #1

[0263] 3501_3, 4301_3 Modulation signal (time slot) sent to Terminal #3

[0264] 3501_4 Modulation signal (time slot) sent to Terminal #4

[0265] 3501_5 Modulation signal (time slot) sent to Terminal #5

[0266] 3501_6 Modulation signal (time slot) sent to Terminal #6

[0267] 3800 Modulation signal (time slot) sent to the i-th terminal

[0268] 3801 The first reference symbol

[0269] 3802, 3902 Control information symbol

[0270] 3803 and 3903 data symbols

[0271] 3804 Second reference symbol

[0272] 3900 Frame or frame group

[0273] 3901 Third reference symbol

[0274] 3904 Fourth reference symbol

[0275] 4001_2 Base station #2. Detailed implementation mode

[0276] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0277] (Embodiment 1)

[0278] The communication system, communication device, and communication method of this embodiment will be described in detail.

[0279] Figure 1A An example of the structure of communication devices such as base stations, access points, terminals, and repeaters in this embodiment is shown.

[0280] Figure 1A The communication device has N transmitting units of "first transmitting unit 102_1 to Nth transmitting unit 102_N". In addition, N is set to an integer of 1 or more or an integer of 2 or more.

[0281] In addition, Figure 1A The communication device has M transmitting panel antennas for transmission of "transmitting panel antenna 1 of 106_1 to transmitting panel antenna M of 106_M". In addition, M is set to an integer of 1 or more or an integer of 2 or more.

[0282] Figure 1A The communication device has n receiving units of "first receiving unit 155_1 to nth receiving unit 155_n". In addition, n is set to an integer of 1 or more or an integer of 2 or more.

[0283] Figure 1A The communication device has m receiving panel antennas for reception of "receiving panel antenna 1 of 151_1 to receiving panel antenna m of 151_m". In addition, m is set to an integer of 1 or more or an integer of 2 or more.

[0284] The i-th transmitting unit 102_i takes the control signal 100 and the i-th data 101_i as inputs, performs processes such as error correction coding and mapping based on the modulation method, and outputs the i-th modulated signal 103_i. In addition, i is set to an integer of 1 or more and N or less.

[0285] The first processing unit 104 takes the i-th modulation signal 103_i (where i is an integer from 1 to N) and above, the control signal 100, and the reference signal 199 as inputs, and based on the information on the frame structure contained in the control signal 100, outputs the j-th transmission signal 105_j (where j is an integer from 1 to M) and above. In addition, among the i-th modulation signals 103_i, there may be modulation signals without signals. Also, among the j-th transmission signals 105_j, there may be transmission signals without signals.

[0286] Next, the j-th transmission signal 105_j is output as radio waves from the transmission panel antenna j of 106_j. In addition, the transmission panel antenna j of 106_j may also take the control signal 100 as an input, perform beamforming to change the transmission directivity. Also, according to the control signal 100, when transmitting a modulation signal to a communication object, the transmission panel antenna j of 106_j can be switched. This will be described later.

[0287] The i-th received signal 152_i is received by the receiving panel antenna i of 151_i. In addition, the receiving panel antenna i of 151_i may also take the control signal 100 as an input and perform beamforming to change the receiving directivity. This will be described later.

[0288] The second processing unit 153 takes the i-th received signal 152_i and the control signal 100 as inputs, performs processing such as frequency conversion, and outputs the j-th signal after processing 154_j. In addition, among the i-th received signals 152_i, there may be received signals without signals. Also, among the j-th signals after processing 154_j, there may be signals after processing without signals.

[0289] The j-th receiving unit 155_j takes the j-th signal after processing 154_j and the control signal 100 as inputs, and based on the control signal 100, performs processing such as demodulation and error correction decoding on the j-th signal after processing 154, and outputs the j-th control data 156_j and the j-th data 157_j.

[0290] The third processing unit 158 takes the j-th control data 156_j as an input, and based on information obtained from the communication object and the like, generates and outputs the control signal 100.

[0291] In addition, Figure 1AThe first processing unit 104 of the communication device may also perform processing for transmitting beamforming (transmission directivity control), such as precoding processing. In addition, the second processing unit 153 may also perform processing for reception directivity control. As another example, for instance, the first processing unit 104 may also perform the following processing, that is, output the first transmission signal 105_1 as the first modulation signal 103_1, the second transmission signal 105_2 as the second modulation signal 103_2, and the third transmission signal 105_3 as the third modulation signal 103_3. Or, the first processing unit 104 may also perform the following processing, that is, output the first transmission signal 105_1 as the second modulation signal 103_2. In addition, the second processing unit 153 may also perform the following processing, that is, output the first signal-processed signal 154_1 as the first reception signal 152_1, the second signal-processed signal 154_2 as the second reception signal 152_2, and the third signal-processed signal 154_3 as the third reception signal 152_3. Or, the second processing unit may also perform the following processing, that is, output the second signal-processed signal 154_2 as the first reception signal 152_1.

[0292] Figure 1A The structure in Figure 1A may also be a structure with a newly added processing unit not shown in Figure 1A For example, the communication device may also include an interleaver for sorting symbols and / or data, a padding unit for padding, etc. Moreover,

[0293] Figure 1B This is a different structural example of a communication device such as a base station, an access point, a terminal, a repeater, etc. in the present embodiment, related to Figure 1A In Figure 1B parts performing the same operations as Figure 1A are given the same reference numerals and detailed descriptions are omitted.

[0294] Figure 1B The feature is that the number of transmission units is the same as the number of transmission panel antennas. At this time, the first processing unit 104 may also perform processing for transmitting beamforming (transmission directivity control), such as precoding. In addition, the first processing unit 104 may also output the x-th transmission signal 105_x as the y-th modulation signal 103_y. Furthermore, x is set as an integer from 1 to M, and y is set as an integer from 1 to M.

[0295] Moreover, the number of receiving units is set to be the same as the number of receiving panel antennas. At this time, the second processing unit 153 can also perform processing for reception directivity control. In addition, the second processing unit 153 can output the signal 154_x after the x-th signal processing as the y-th received signal 152_y. Furthermore, x is set to an integer of 1 or more and m or less, and y is set to an integer of 1 or more and m or less.

[0296] Figure 1C This is a structural example different from that of a communication device such as a base station, an access point, a terminal, a repeater, etc. in the present embodiment Figure 1A , Figure 1B in Figure 1C , parts performing the same operations as Figure 1A are given the same reference numerals, and detailed descriptions thereof are omitted.

[0297] Figure 1C The feature thereof is that the number of transmitting units is the same as the number of transmitting panel antennas, and there is no first processing unit. In addition, the number of receiving units is the same as the number of receiving panel antennas, and there is no second processing unit.

[0298] Figure 2 A structural example of the i-th transmitting unit 102_i is shown. Furthermore, i is set to "an integer of 1 or more and N or less" or "an integer of 1 or more and M or less".

[0299] The data symbol generation unit 202 takes the data 201 and the control signal 200 as inputs, and based on information such as the error correction coding method information, modulation method information, transmission method information, and frame structure method contained in the control signal 200, performs error correction coding, mapping, signal processing for transmission, etc., and outputs the modulated signal 203 of the data symbol. In addition, the data 201 corresponds to the i-th data 101_i, and the control signal 200 corresponds to the control signal 100.

[0300] The sector scan reference signal generation unit 204 takes the control signal 200 as an input, and based on the frame structure information contained in the control signal 200, generates and outputs the sector scan reference signal 205.

[0301] The other signal generation unit 206 takes the control signal 200 as an input, and based on the control signal, generates and outputs the other signal 207.

[0302] The processing unit 251 takes the modulated signal 203 of the data symbol, the sector scan reference signal 205, the other signal 207, and the control signal 200 as inputs, and based on the frame structure information contained in the control signal 200, generates and outputs the modulated signal 252 that follows the frame structure. In addition, the modulated signal 252 that follows the frame structure corresponds to the i-th modulated signal 103_i.

[0303] Figure 3 shows an example of the structure of the transmission panel antenna i of 106_i in Figure 1A , Figure 1B , Figure 1C . In addition, let i be an integer from 1 to M. The distribution unit 302 takes the transmission signal 301 as input, distributes it, and outputs the first transmission signal 303_1, the second transmission signal 303_2, the third transmission signal 303_3, and the fourth transmission signal 303_4. In addition, the transmission signal 301 corresponds to " Figure 1A , Figure 1B 's i-th transmission signal 105_i" or " Figure 1C 's i-th modulation signal 103_i".

[0304] The multiplication unit 304_1 takes the first transmission signal 303_1 and the control signal 300 as input, multiplies the first transmission signal 303_1 by a multiplication coefficient based on the control signal 300, and generates and outputs the first transmission signal 305_1 after multiplying by the coefficient. Then, the first transmission signal 305_1 after multiplying by the coefficient is output as radio waves from the antenna 306_1. In addition, the control signal 300 corresponds to the control signal 100.

[0305] Specifically, it is described as follows. Represent the first transmission signal 303_1 as tx1(t). Where t is time. And if the multiplication coefficient is set to w1, the first transmission signal 305_1 after multiplying by the coefficient can be represented as tx1(t)×w1. In addition, since tx1(t) can be represented by a complex number, it can also be a real number. Also, since w1 can be represented by a complex number, it can also be a real number.

[0306] The multiplication unit 304_2 takes the second transmission signal 303_2 and the control signal 300 as input, multiplies the second transmission signal 303_2 by a multiplication coefficient based on the control signal 300, and generates and outputs the second transmission signal 305_2 after multiplying by the coefficient. Then, the second transmission signal 305_2 after multiplying by the coefficient is output as radio waves from the antenna 306_2.

[0307] Specifically, it is described as follows. Represent the second transmission signal 303_2 as tx2(t). Where t is time. And if the multiplication coefficient is set to w2, the second transmission signal 305_2 after multiplying by the coefficient can be represented as tx2(t)×w2. In addition, since tx2(t) can be represented by a complex number, it can also be a real number. Also, since w2 can be represented by a complex number, it can also be a real number.

[0308] The multiplier 304_3 takes the 3rd transmission signal 303_3 and the control signal 300 as inputs. Based on the control signal 300, it multiplies the multiplication coefficient by the 3rd transmission signal 303_3, generates and outputs the 3rd transmission signal 305_3 after multiplying by the coefficient. Then, the 3rd transmission signal 305_3 after multiplying by the coefficient is output as radio waves from the antenna 306_3.

[0309] Specifically, it will be described. Represent the 3rd transmission signal 303_3 as tx3(t). Where t is time. And if the multiplication coefficient is set as w3, the 3rd transmission signal 305_3 after multiplying by the coefficient can be represented as tx3(t)×w3. In addition, since tx3(t) can be represented by a complex number, it can also be a real number. Also, since w3 can be represented by a complex number, it can also be a real number.

[0310] The multiplier 304_4 takes the 4th transmission signal 303_4 and the control signal 300 as inputs. Based on the control signal 300, it multiplies the multiplication coefficient by the 4th transmission signal 303_4, generates and outputs the 4th transmission signal 305_4 after multiplying by the coefficient. Then, the 4th transmission signal 305_4 after multiplying by the coefficient is output as radio waves from the antenna 306_4.

[0311] Specifically, it will be described. Represent the 4th transmission signal 303_4 as tx4(t). Where t is time. And if the multiplication coefficient is set as w4, the 4th transmission signal 305_4 after multiplying by the coefficient can be represented as tx4(t)×w4. In addition, since tx4(t) can be represented by a complex number, it can also be a real number. Also, since w4 can be represented by a complex number, it can also be a real number.

[0312] In addition, it can also be that "the absolute values of w1, w2, w3, and w4 are equal". In this case, it is equivalent to performing a phase change. Of course, the absolute values of w1, w2, w3, and w4 can also be not equal.

[0313] The values of w1, w2, w3, and w4 can be switched by frame, can be switched by time slot, can be switched by mini time slot, can also be switched in units of multiple symbols, and can also be switched by symbol. The switching timing of the values of w1, w2, w3, and w4 is not limited to the above examples.

[0314] In addition, Figure 3 An example in which the transmission panel antenna is composed of 4 antennas (and 4 multipliers) has been described, but the number of antennas is not limited to 4, as long as it is composed of 2 or more antennas.

[0315] In addition, Figure 1A , Figure 1B , Figure 1CThe transmitting panel antenna i of 106_i can also perform directivity control by changing the characteristics of the antenna itself. At this time, the transmitting panel antenna i of 106_i only needs to be composed of one or more antennas.

[0316] Figure 4 shows Figure 1A , Figure 1B , Figure 1C the structure of the receiving panel antenna i of 151_i. In addition, i is set to "an integer of 1 or more and m or less".

[0317] The multiplying unit 403_1 takes the first received signal 402_1 received by the antenna 401_1 and the control signal 400 as inputs, and based on the control signal 400, multiplies the multiplying coefficient by the first received signal 402_1, and outputs the first received signal 404_1 after multiplying by the coefficient.

[0318] Specifically, it will be described. The first received signal 402_1 is represented as rx1(t). Where t is time. And if the multiplying coefficient is set to d1, the first received signal 404_1 after multiplying by the coefficient can be represented as rx1(t)×d1. In addition, since rx1(t) can be represented by a complex number, it can also be a real number. Also, since d1 can be represented by a complex number, it can also be a real number.

[0319] The multiplying unit 403_2 takes the second received signal 402_2 received by the antenna 401_2 and the control signal 400 as inputs, and based on the control signal 400, multiplies the multiplying coefficient by the second received signal 402_2, and outputs the second received signal 404_2 after multiplying by the coefficient.

[0320] Specifically, it will be described. The second received signal 402_2 is represented as rx2(t). Where t is time. And if the multiplying coefficient is set to d2, the second received signal 404_2 after multiplying by the coefficient can be represented as rx2(t)×d2. In addition, since rx2(t) can be represented by a complex number, it can also be a real number. Also, since d2 can be represented by a complex number, it can also be a real number.

[0321] The multiplying unit 403_3 takes the third received signal 402_3 received by the antenna 401_3 and the control signal 400 as inputs, and based on the control signal 400, multiplies the multiplying coefficient by the third received signal 402_3, and outputs the third received signal 404_3 after multiplying by the coefficient.

[0322] Specifically, the third received signal 402_3 is represented as rx3(t), where t is time. Moreover, if the multiplication coefficient is set as d3, the third received signal 404_3 after multiplying by the coefficient can be represented as rx3(t)×d3. In addition, since rx3(t) can be represented by a complex number, it can also be a real number. Also, since d3 can be represented by a complex number, it can also be a real number.

[0323] The multiplication unit 403_4 takes the fourth received signal 402_4 received by the antenna 401_4 and the control signal 400 as inputs, and based on the control signal 400, multiplies the multiplication coefficient by the fourth received signal 402_4, and outputs the fourth received signal 404_4 after multiplying by the coefficient.

[0324] Specifically, the fourth received signal 402_4 is represented as rx4(t), where t is time. Moreover, if the multiplication coefficient is set as d4, the fourth received signal 404_4 after multiplying by the coefficient can be represented as rx4(t)×d4. In addition, since rx4(t) can be represented by a complex number, it can also be a real number. Also, since d4 can be represented by a complex number, it can also be a real number.

[0325] The coupling / combining unit 405 takes the first received signal 404_1 after multiplying by the coefficient, the second received signal 404_2 after multiplying by the coefficient, the third received signal 404_3 after multiplying by the coefficient, and the fourth received signal 404_4 after multiplying by the coefficient as inputs, combines the first received signal 404_1 after multiplying by the coefficient, the second received signal 404_2 after multiplying by the coefficient, the third received signal 404_3 after multiplying by the coefficient, and the fourth received signal 404_4 after multiplying by the coefficient, and outputs the modulation signal 406. In addition, the modulation signal 406 is represented as rx1(t)×d1 + rx2(t)×d2 + rx3(t)×d3 + rx4(t)×d4.

[0326] In addition, the control signal 400 corresponds to the control signal 100. Also, the modulation signal 406 corresponds to the i-th received signal of 152_i.

[0327] Moreover, it can also be that "the absolute values of d1, d2, d3, and d4 are equal". In this case, it is equivalent to performing a phase change. Of course, the absolute values of d1, d2, d3, and d4 can also be not equal.

[0328] The values of d1, d2, d3, and d4 can be switched by frame, by time slot, by mini time slot, or in units of multiple symbols, or by symbol. The switching timing of the values of d1, d2, d3, and d4 is not limited to the above examples.

[0329] In addition, an example in which the receiving panel antenna of Figure 4 is composed of four antennas (and four multiplying units) has been described, but the number of antennas is not limited to four, and it may be composed of two or more antennas.

[0330] In addition, Figure 1A , Figure 1B , Figure 1C For the receiving panel antenna i of 151_i in Figure 1C , directivity control can also be performed by changing the characteristics of the antenna itself. In this case, the receiving panel antenna i of 151_i may be composed of one or more antennas.

[0331] In the present embodiment, it is assumed that Figure 1A , Figure 1B , Figure 1C The communication device corresponds to transmission and reception in a single-carrier transmission mode.

[0332] Figure 5 FIG. shows a structural example of a transmitting device when using a single-carrier method based on DFT (Discrete Fourier Transform). As Figure 5 shown, the transmitting device is composed of a constellation mapper 501, tone mapping 502, IFFT (Inverse Fast Fourier Transform) 503, CP (Cyclic Prefix) insertion unit (CP insertion) 504, and a transmitting FE processing unit (Tx (Transmitter) FE (Front End) processing) 505. In addition, there may be other processing units in the transmitting device.

[0333] Figure 6 FIG. shows a structural example of a receiving device when using a single-carrier method based on DFT. As Figure 6 shown, the receiving device is composed of a receiving FE processing unit (Rx (Receiver) FE processing) 601, a CP removal unit (CP Removal) 602, an FFT (Fast Fourier Transform) 603, tone demapping 604, an FDE (Frequency Domain Equalization) 605, a DFT 606, and a demapper 607. In addition, there may be other processing units in the receiving device.

[0334] ​​ Figure 7 shows a structural example of a transmission device when using a time-domain based single-carrier method. As Figure 7 shown, the transmission device is composed of a constellation mapper 701, a CP insertion unit 702, an up-sampling and pulse shaping unit 703, and a Tx (Transmitter) FE (Front End) processing unit 704. In addition, there may be other processing units in the transmission device.

[0335] Figure 8 shows a structural example of a receiving device when using a time-domain based single-carrier method. As Figure 8 shown, the receiving device is composed of an Rx (Receiver) FE processing unit 801, a down-sampling and match filtering unit 802, a TDE (Time Domain Equalization) unit 803, a CP removal unit 804, and a demapper 805. In addition, there may be other processing units in the receiving device.

[0336] In the above content, examples of the transmission method, reception method, transmission apparatus, and reception apparatus structures in the single-carrier mode are described. However, the examples of the single-carrier mode of the transmission method, reception method, transmission apparatus, and reception apparatus are not limited thereto. For example, examples of the single-carrier mode include "DFT (Discrete Fourier Transform)-Spread OFDM (Orthogonal Frequency Division Multiplexing)" (DFT-SOFDM), "Trajectory Constrained DFT-Spread OFDM", "Constrained DFT-Spread OFDM" (Constrained DFT-S OFDM), "OFDM based SC (Single Carrier)", "SC (Single Carrier)-FDMA (Frequency Division Multiple Access)", "Gurd interval DFT-Spread OFDM", time-domain implementation single-carrier mode (e.g., SC (Single Carrier)-QAM), etc.

[0337] Fig. 9 An example of the communication state in the present embodiment is shown. As Fig. 9 shown, consider the case where the base station #1 of 901_1 communicates with the terminal #1 of 902_1, the terminal #2 of 902_2, and the terminal #3 of 902_3. However, the relationship between the base station and the terminal is not limited to this example. For example, the base station may also communicate with one or more terminals.

[0338] In addition, hereinafter, the case where the base station and the terminal perform TDD (Time Division Duplex), TDMA (Time Division Multiple Access), and TDM (Time Division Multiplexing) will be described as an example.

[0339] Fig.10 An example of the modulated signal 1000 transmitted by the base station #1 of 901_1 in Fig. 9 is shown. In Fig.10In [the figure], the horizontal axis represents time. There is a reference signal 1001 for sector sweep in the time interval from time t0 to time t1. In addition, the reference signal 1001 for sector sweep will be described later.

[0340] The time interval from time t1 to time t2 is the terminal response interval. In addition, the response of the terminal will be described later.

[0341] There is a feedback signal 1002 in the time interval from time t2 to time t3. In addition, the feedback signal 1002 will be described later.

[0342] There is a frame 1003 containing data symbols in the time interval from time t4 to time t5. In addition, the frame 1003 containing data symbols will be described later.

[0343] In Fig.10 Although it is called "reference signal 1001 for sector sweep", the name is not limited to this, and it can also be called "reference signal", "reference symbol", "training signal", "training symbol", "reference signal", "reference symbol", etc. In addition, although it is called "feedback signal 1002", the name is not limited to this, and it can also be called "feedback symbol", "signal sent to the terminal", "symbol sent to the terminal", "control signal", "control symbol", etc. Moreover, although it is called "frame 1003 containing data symbols", the name is not limited to this, and it can also be called "frame", "time slot", "mini time slot", "unit", etc.

[0344] Fig.11 Shows Fig. 9 Of the base station #1 of 901_1 Fig.10 An example of the reference signal 1001 for sector sweep transmitted. In addition, in Fig.11 The horizontal axis represents time.

[0345] For example, the base station #1 of 901_1 having Figure 1A , Figure 1B , Figure 1C Sends the reference signal 1101_1 for sector sweep in the transmission panel antenna 1 from the transmission panel antenna 1 of 106_1.

[0346] Therefore, as Fig.11 Shown, the base station #1 of 901_1 having Figure 1A , Figure 1B , Figure 1C Sends the reference signal 1101_i for sector sweep in the transmission panel antenna i from the transmission panel antenna i of 106_i. In addition, i is an integer greater than or equal to 1 and less than or equal to M.

[0347] Fig.12 shows Fig.11 a structural example of the "reference signal 1101_i for sector scanning in the transmission panel antenna i". In addition, in Fig.12 , the horizontal axis is time.

[0348] For example, assume that the base station #1 of 901_1 having the structure of Figure 1A , Figure 1B , Figure 1C has the structure of Figure 3 as the transmission panel antenna i of 106_i.

[0349] The "reference signal 1201_1 using the first parameter in the transmission panel antenna i" is described.

[0350] When the base station #1 of 901_1 transmits the "reference signal 1201_1 using the first parameter in the transmission panel antenna i" shown in Fig.12 , the base station #1 of 901_1 sets the multiplication coefficient of the multiplier 304_1 in the transmission panel antenna i of 106_i to w1(i, 1). If the first transmission signal 303_1 in the "reference signal 1201_1 using the first parameter in the transmission panel antenna i" is set to tx1ref1(t), then the multiplier 304_1 will obtain tx1ref1(t) × w1(i, 1). Then, the base station #1 of 901_1 transmits tx1ref1(t) × w1(i, 1) from the Figure 3 antenna 306_1. In addition, t is time.

[0351] When the base station #1 of 901_1 transmits the "reference signal 1201_1 using the first parameter in the transmission panel antenna i" shown in Fig.12 , the base station #1 of 901_1 sets the multiplication coefficient of the multiplier 304_2 in the transmission panel antenna i of 106_i to w2(i, 1). If the second transmission signal 303_2 in the "reference signal 1201_1 using the first parameter in the transmission panel antenna i" is set to tx2ref1(t), then the multiplier 304_2 will obtain tx2ref1(t) × w2(i, 1). Then, the base station #1 of 901_1 transmits tx2ref1(t) × w2(i, 1) from the Figure 3 antenna 306_2.

[0352] When the base station #1 of 901_1 transmits the Fig.12When referring to "Reference Signal 1201_1 Using the First Parameter in Transmission Panel Antenna i" as shown, Base Station #1 of 901_1 sets the multiplication coefficient of the multiplication unit 304_3 in the transmission panel antenna i of 106_i to w3(i, 1). If the third transmission signal 303_3 in "Reference Signal 1201_1 Using the First Parameter in Transmission Panel Antenna i" is set to tx3ref1(t), then the multiplication unit 304_3 will obtain tx3ref1(t) × w3(i, 1). Then, Base Station #1 of 901_1 transmits tx3ref1(t) × w3(i, 1) from Figure 3 the antenna 306_3.

[0353] When Base Station #1 of 901_1 transmits Fig.12 When referring to "Reference Signal 1201_1 Using the First Parameter in Transmission Panel Antenna i" as shown, Base Station #1 of 901_1 sets the multiplication coefficient of the multiplication unit 304_4 in the transmission panel antenna i of 106_i to w4(i, 1). If the fourth transmission signal 303_4 in "Reference Signal 1201_1 Using the First Parameter in Transmission Panel Antenna i" is set to tx4ref1(t), then the multiplication unit 304_4 will obtain tx4ref1(t) × w4(i, 1). Then, Base Station #1 of 901_1 transmits tx4ref1(t) × w4(i, 1) from Figure 3 the antenna 306_4.

[0354] An explanation is given for "Reference Signal 1201_j Using the j-th Parameter in Transmission Panel Antenna i".

[0355] When Base Station #1 of 901_1 transmits Fig.12 When referring to "Reference Signal 1201_j Using the j-th Parameter in Transmission Panel Antenna i" as shown, Base Station #1 of 901_1 sets the multiplication coefficient of the multiplication unit 304_1 in the transmission panel antenna i of 106_i to w1(i, j). If the first transmission signal 303_1 in "Reference Signal 1201_j Using the j-th Parameter in Transmission Panel Antenna i" is set to tx1refj(t), then the multiplication unit 304_1 will obtain tx1refj(t) × w1(i, j). Then, Base Station #1 of 901_1 transmits tx1refj(t) × w1(i, j) from Figure 3 the antenna 306_1. Here, t is time.

[0356] When Base Station #1 of 901_1 transmits Fig.12When referring to "Reference Signal 1201_j Using the j-th Parameter in Transmission Panel Antenna i" as shown, Base Station #1 of 901_1 sets the multiplication coefficient of the multiplier 304_2 in the transmission panel antenna i of 106_i to w2(i, j). If the second transmission signal 303_2 in "Reference Signal 1201_j Using the j-th Parameter in Transmission Panel Antenna i" is set as tx2refj(t), then the multiplier 304_2 will obtain tx2refj(t) × w2(i, j). Then, Base Station #1 of 901_1 transmits tx2refj(t) × w2(i, j) from the Figure 3 antenna 306_2.

[0357] When Base Station #1 of 901_1 transmits Fig.12 the "Reference Signal 1201_j Using the j-th Parameter in Transmission Panel Antenna i" as shown, Base Station #1 of 901_1 sets the multiplication coefficient of the multiplier 304_3 in the transmission panel antenna i of 106_i to w3(i, j). If the third transmission signal 303_3 in "Reference Signal 1201_j Using the j-th Parameter in Transmission Panel Antenna i" is set as tx3refj(t), then the multiplier 304_3 will obtain tx3refj(t) × w3(i, j). Then, Base Station #1 of 901_1 transmits tx3refj(t) × w3(i, j) from the Figure 3 antenna 306_3.

[0358] When Base Station #1 of 901_1 transmits Fig.12 the "Reference Signal 1201_j Using the j-th Parameter in Transmission Panel Antenna i" as shown, Base Station #1 of 901_1 sets the multiplication coefficient of the multiplier 304_4 in the transmission panel antenna i of 106_i to w4(i, j). If the fourth transmission signal 303_4 in "Reference Signal 1201_j Using the j-th Parameter in Transmission Panel Antenna i" is set as tx4refj(t), then the multiplier 304_4 will obtain tx4refj(t) × w4(i, j). Then, Base Station #1 of 901_1 transmits tx4refj(t) × w4(i, j) from the Figure 3 antenna 306_4.

[0359] In addition, in Fig.12 the case, j is an integer from 1 to 4. In Fig.12 , the number of parameter changes Z is set to Z = 4, but the number of parameter changes Z is not limited to 4. As long as Z is an integer of 1 or more or an integer of 2 or more, it can be implemented similarly. At this time, j is an integer from 1 to Z.

[0360] Assume that, as in Fig.11 , Fig.12As shown, when base station #1 of 901_1 transmits "reference signal 1101_i for sector scanning in transmitting panel antenna i", "reference signal 1201_j using j-th parameter in transmitting panel antenna i" includes the following information, for example.

[0361] The ID (identification) of the transmitting panel antenna (here, for example, equivalent to i)

[0362] Identification number (ID) of the parameter used for beamforming (directivity control) (here, for example, equivalent to j)

[0363] When a terminal transmits a reference signal for sector scanning, the number of time slots in which the reference signal for sector scanning can be transmitted (the number of terminals that can transmit the reference signal for sector scanning) (This will be described later.)

[0364] By sending the "ID (identification) of the transmitting panel antenna" and "the identification number (ID) of the parameters used for beamforming (directivity control)" through the base station #1 of 901_1, the terminal can be aware of the received "ID (identification) of the transmitting panel antenna" and "the identification number (ID) of the parameters used for beamforming (directivity control)", and the base station #1 of 901_1 and the terminal can perform appropriate control, thereby achieving the effect of improving the data reception quality.

[0365] In addition, the "number of time slots in which a reference signal for sector scanning can be sent when a terminal sends a reference signal for sector scanning (the number of terminals that can send a reference signal for sector scanning)" can be changed according to frames and / or time, etc. This can achieve the following effect, that is, the data transmission efficiency of the communication system can be improved.

[0366] Next, explain Fig.10 The terminal response interval in is the action from time t1 to time t2.

[0367] Fig.13 The operation example of the terminal response interval, that is, the time interval from time t1 to time t2 is shown. Fig.13 , the horizontal axis is time.

[0368] Assume that Fig.10 , Fig.13 As shown, for example, base station #1 of 901_1 sends a sector scanning reference signal in the time interval from time t0 to time t1. Then, it is assumed that in the time interval from time t1 to time t2, i.e., the terminal response interval, Fig.13As such, there are a transmission period 1301_1 of the "sector scan reference signal" for the first terminal, a transmission period 1301_2 of the "sector scan reference signal" for the second terminal, a transmission period 1301_3 of the "sector scan reference signal" for the third terminal, and a transmission period 1301_4 of the "sector scan reference signal" for the fourth terminal.

[0369] Accordingly, in Fig.13 the case of, base station #1 of 901_1 sets the "number of time slots in which the sector scan reference signal can be transmitted (number of terminals that can transmit the sector scan reference signal) when the terminal transmits the sector scan reference signal" to 4.

[0370] Fig.14 illustrates an example related to the occupation of the terminals of Fig.13 the "transmission period 1301_1 of the'sector scan reference signal' for the first terminal, transmission period 1301_2 of the'sector scan reference signal' for the second terminal, transmission period 1301_3 of the'sector scan reference signal' for the third terminal, and transmission period 1301_4 of the'sector scan reference signal' for the fourth terminal" shown. In addition, in Fig.14 the horizontal axis is time.

[0371] Fig. 9 The terminal #1 of 902_1 receives the sector scan reference signal 1001 transmitted by base station #1 of 901_1 and estimates the "transmission panel antenna and parameter number" with good reception quality in the transmission panel antenna of base station #1 of 901_1. In addition, this estimation can be performed by obtaining the sector scan reference signal 1001 and the "ID (identification) of the transmission panel antenna" and the "identification number (ID) of the parameter used for beamforming (directivity control)" included in the sector scan reference signal 1001.

[0372] Assume that the terminal #1 of 902_1 estimates, for example, "transmission panel antenna a1 and parameter b1" as the "transmission panel antenna and parameter" with good reception quality.

[0373] In addition, while estimating the "transmission panel antenna and parameter" with good reception quality, the terminal #1 of 902_1 obtains information on the "number of time slots in which the sector scan reference signal can be transmitted (number of terminals that can transmit the sector scan reference signal) when the terminal transmits the sector scan reference signal". In Fig.14 the case of, the terminal #1 of 902_1 obtains the information that the "number of time slots in which the sector scan reference signal can be transmitted (number of terminals that can transmit the sector scan reference signal) when the terminal transmits the sector scan reference signal" is 4.

[0374] In this case, Terminal #1 of 902_1 obtains a certain value among, for example, "0", "1", "2", "3" using a random number. For example, assume that Terminal #1 of 902_1 obtains "0" using a random number. In this case, since "0" + 1 = 1, Terminal #1 of 902_1 uses Fig.14 the "sector scan reference signal transmission interval 1301_1 for the 1st (="0" + 1) terminal" to transmit the sector scan reference signal 1401_1. Here, a random number is used to set the transmission interval of the sector scan reference signal, but it is also possible to use, for example, a random number of integers or natural numbers, irregular integers or natural numbers, regular integers or natural numbers, integers or natural numbers inherently reserved by the terminal, etc. instead of a random number to set the transmission interval of the sector scan reference signal. Thus, the setting of the transmission interval of the sector scan reference signal is not limited to the above example. For example, the transmission interval of the sector scan reference signal is set for each terminal. This point also applies to the following similar descriptions.

[0375] In addition, assume that the sector scan reference signal 1401_1 contains information on the "transmission panel antenna and parameters" with good reception quality obtained by Terminal #1 of 902_1, that is, information on "transmission panel antenna a1 and parameters b1". This will be described later.

[0376] Similarly, Fig. 9 Terminal #2 of 902_2 receives the sector scan reference signal 1001 transmitted by Base Station #1 of 901_1 and estimates the "transmission panel antenna and parameter number" with good reception quality in the transmission panel antenna of Base Station #1 of 901_1. In addition, this estimation can be performed by obtaining the sector scan reference signal 1001 and the "ID (identification) of the transmission panel antenna" and the "ID of the parameter used for beamforming (directional control)" contained in this sector scan reference signal 1001.

[0377] Assume that Terminal #2 of 902_2 estimates, for example, "transmission panel antenna a2 and parameters b2" as the "transmission panel antenna and parameters" with good reception quality.

[0378] In addition, while estimating the "transmission panel antenna and parameters" with good reception quality, Terminal #2 of 902_2 obtains information on "the number of time slots in which the sector scan reference signal can be transmitted (the number of terminals that can transmit the sector scan reference signal) when the sector scan reference signal is transmitted from the terminal". In Fig.14 this case, Terminal #2 of 902_2 obtains the information that "the number of time slots in which the sector scan reference signal can be transmitted (the number of terminals that can transmit the sector scan reference signal) when the sector scan reference signal is transmitted from the terminal" is 4.

[0379] In this case, Terminal #2 of 902_2 obtains a certain value among, for example, "0", "1", "2", and "3" using a random number. For example, assume that Terminal #2 of 902_2 obtains "2" using a random number. In this case, since "2" + 1 = 3, Terminal #2 of 902_2 uses Fig.14 the "sector scan reference signal transmission section 1301_3 for the 3rd (= "2" + 1) terminal" to transmit the sector scan reference signal 1401_2.

[0380] In addition, assume that the sector scan reference signal 1401_2 contains information on the "transmission panel antenna and parameters" with good reception quality obtained by Terminal #2 of 902_2, that is, information on "transmission panel antenna a2 and parameters b2". This will be described later.

[0381] Therefore, Terminal #i of 902_i receives the sector scan reference signal 1001 transmitted by Base Station #1 of 901_1 and estimates the "transmission panel antenna and parameter number" with good reception quality in the transmission panel antenna of Base Station #1 of 901_1. In addition, this estimation can be performed by obtaining the sector scan reference signal 1001 and the "ID (identification) of the transmission panel antenna" and the "identification number (ID) of the parameters used for beamforming (directivity control)" contained in this sector scan reference signal 1001. In addition, for example, i is set to an integer of 1 or more.

[0382] Assume that Terminal #i of 902_i estimates, for example, "transmission panel antenna ai and parameters bi" as the "transmission panel antenna and parameters" with good reception quality.

[0383] In addition, while estimating the "transmission panel antenna and parameters" with good reception quality, Terminal #i of 902_i obtains information on "the number of time slots in which the sector scan reference signal can be transmitted (the number of terminals that can transmit the sector scan reference signal) when the terminal transmits the sector scan reference signal". In Fig.14 this case, Terminal #i of 902_i obtains the information that "the number of time slots in which the sector scan reference signal can be transmitted (the number of terminals that can transmit the sector scan reference signal) when the terminal transmits the sector scan reference signal" is 4.

[0384] In this case, Terminal #i of 902_i obtains a certain value among, for example, "0", "1", "2", "3" using a random number. For example, assume that Terminal #i of 902_i obtains "j" using a random number. In addition, j is a certain value among "0", "1", "2", "3". In this case, Terminal #i of 902_i uses Fig.14The (j + 1)-th terminal uses the "sector scanning reference signal" transmission interval 1301_(j + 1) to transmit the sector scanning reference signal 1401_i.

[0385] In addition, it is assumed that the sector scanning reference signal 1401_i contains information on the "transmission panel antenna and parameters" with good reception quality obtained by the terminal #i of 902_i, that is, information on the "transmission panel antenna ai and parameters bi". This will be described later.

[0386] In this way, it is possible to reduce the conflict of the sector scanning reference signals transmitted by each terminal. Therefore, it is possible to increase the number of sector scanning reference signals that the base station can receive, and thus the following effect can be obtained, that is, the number of terminals that can communicate with the base station can be increased.

[0387] For the already used Fig.14 The structure of the sector scanning reference signal 1401_i transmitted by the terminal #i of 902_i described above will be described. In addition, for the sake of simplicity of description, it is assumed that the terminal #i of 902_i has Figure 1A 、 Figure 1B 、 Figure 1C 's structure. In addition, it is assumed that the terminal #i of 902_i having Figure 1A 、 Figure 1B 、 Figure 1C 's structure has Figure 3 's structure as the transmission panel antenna xi of 106_xi. However, the structure of the terminal #i of 902_i is not limited to Figure 1A 、 Figure 1B 、 Figure 1C 's structure. In addition, the structure of the transmission panel antenna xi of 106_xi that the terminal #i of 902_i having Figure 1A 、 Figure 1B 、 Figure 1C 's structure has is not limited to Figure 3 .

[0388] Fig.11 FIG. shows an example of the sector scanning reference signal 1401_i transmitted by the terminal #i of 902_i. In addition, in Fig.11 , the horizontal axis is time.

[0389] For example, the terminal #i of 902_i having Figure 1A 、 Figure 1B 、 Figure 1C 's structure transmits the sector scanning reference signal 1101_1 in the transmission panel antenna 1 from the transmission panel antenna 1 of 106_1.

[0390] Therefore, as Fig.11 shows, the terminal #i having Figure 1A 、 Figure 1B 、 Figure 1C The terminal #i of 902_i with the structure transmits the sector scan reference signal 1101_xi in the transmission panel antenna xi from the transmission panel antenna xi of 106_xi. Here, xi is an integer greater than or equal to 1 and less than or equal to M.

[0391] Fig.15 shows Fig.11 a structural example of the "sector scan reference signal 1101_xi in the transmission panel antenna xi". Also, in Fig.15 , the horizontal axis is time.

[0392] For example, the terminal #i of 902_i having Figure 1A , Figure 1B , Figure 1C the structure has Figure 3 the structure as the transmission panel antenna xi of 106_xi.

[0393] An explanation is given for the "reference signal 1501_1 using the first parameter in the transmission panel antenna xi".

[0394] When the terminal #i of 902_i transmits Fig.15 the "reference signal 1501_1 using the first parameter in the transmission panel antenna xi" shown, the terminal #i of 902_i sets the multiplication coefficient of the multiplier 304_1 in the transmission panel antenna xi of 106_xi to w1(xi, 1). If the first transmission signal 303_1 in the "reference signal 1501_1 using the first parameter in the transmission panel antenna xi" is set to tx1ref1(t), the multiplier 304_1 obtains tx1ref1(t) × w1(xi, 1). Then, the terminal #i of 902_i transmits tx1ref1(t) × w1(xi, 1) from Figure 3 the antenna 306_1. Here, t is time.

[0395] When the terminal #i of 902_i transmits Fig.15 the "reference signal 1501_1 using the first parameter in the transmission panel antenna xi" shown, the terminal #i of 902_i sets the multiplication coefficient of the multiplier 304_2 in the transmission panel antenna xi of 106_xi to w2(xi, 1). If the second transmission signal 303_2 in the "reference signal 1501_1 using the first parameter in the transmission panel antenna xi" is set to tx2ref1(t), the multiplier 304_2 obtains tx2ref1(t) × w2(xi, 1). Then, the terminal #i of 902_i transmits tx2ref1(t) × w2(xi, 1) from Figure 3 the antenna 306_2.

[0396] When the terminal #i of 902_i transmits Fig.15 When referring to "Reference Signal 1501_1 Using the First Parameter in Transmission Panel Antenna xi" as shown, the terminal #i of 902_i sets the multiplication coefficient of the multiplication unit 304_3 in the transmission panel antenna xi of 106_xi to w3(xi, 1). If the third transmission signal 303_3 in "Reference Signal 1501_1 Using the First Parameter in Transmission Panel Antenna xi" is set to tx3ref1(t), then the multiplication unit 304_3 obtains tx3ref1(t) × w3(xi, 1). Then, the terminal #i of 902_i transmits tx3ref1(t) × w3(xi, 1) from Figure 3 antenna 306_3.

[0397] When the terminal #i of 902_i transmits Fig.15 When referring to "Reference Signal 1501_1 Using the First Parameter in Transmission Panel Antenna xi" as shown, the terminal #i of 902_i sets the multiplication coefficient of the multiplication unit 304_4 in the transmission panel antenna xi of 106_xi to w4(xi, 1). If the fourth transmission signal 303_4 in "Reference Signal 1501_1 Using the First Parameter in Transmission Panel Antenna xi" is set to tx4ref1(t), then the multiplication unit 304_4 obtains tx4ref1(t) × w4(xi, 1). Then, the terminal #i of 902_i transmits tx4ref1(t) × w4(xi, 1) from Figure 3 antenna 306_4.

[0398] The "Reference Signal 1501_j Using the j-th Parameter in Transmission Panel Antenna xi" will be described.

[0399] When the terminal #i of 902_i transmits Fig.15 When referring to "Reference Signal 1501_j Using the j-th Parameter in Transmission Panel Antenna xi" as shown, the terminal #i of 902_i sets the multiplication coefficient of the multiplication unit 304_1 in the transmission panel antenna xi of 106_xi to w1(xi, j). If the first transmission signal 303_1 in "Reference Signal 1501_j Using the j-th Parameter in Transmission Panel Antenna xi" is set to tx1refj(t), then the multiplication unit 304_1 obtains tx1refj(t) × w1(xi, j). Then, the terminal #i of 902_i transmits tx1refj(t) × w1(xi, j) from Figure 3 antenna 306_1. Here, t is time.

[0400] When the terminal #i of 902_i transmits Fig.15When referring to the "reference signal 1501_j using the j-th parameter in the transmit panel antenna xi" as shown, the terminal #i of 902_i sets the multiplication coefficient of the multiplier 304_2 in the transmit panel antenna xi of 106_xi to w2(xi, j). If the second transmit signal 303_2 in the "reference signal 1501_j using the j-th parameter in the transmit panel antenna xi" is set to tx2refj(t), then the multiplier 304_2 will obtain tx2refj(t) × w2(xi, j). Then, the terminal #i of 902_i transmits tx2refj(t) × w2(xi, j) from the Figure 3 antenna 306_2.

[0401] When the terminal #i of 902_i transmits Fig.15 the "reference signal 1501_j using the j-th parameter in the transmit panel antenna xi" as shown, the terminal #i of 902_i sets the multiplication coefficient of the multiplier 304_3 in the transmit panel antenna xi of 106_xi to w3(xi, j). If the third transmit signal 303_3 in the "reference signal 1501_j using the j-th parameter in the transmit panel antenna xi" is set to tx3refj(t), then the multiplier 304_3 will obtain tx3refj(t) × w3(xi, j). Then, the terminal #i of 902_i transmits tx3refj(t) × w3(xi, j) from the Figure 3 antenna 306_3.

[0402] When the terminal #i of 902_i transmits Fig.15 the "reference signal 1501_j using the j-th parameter in the transmit panel antenna xi" as shown, the terminal #i of 902_i sets the multiplication coefficient of the multiplier 304_4 in the transmit panel antenna xi of 106_xi to w4(xi, j). If the fourth transmit signal 303_4 in the "reference signal 1501_j using the j-th parameter in the transmit panel antenna xi" is set to tx4refj(t), then the multiplier 304_4 will obtain tx4refj(t) × w4(xi, j). Then, the terminal #i of 902_i transmits tx4refj(t) × w4(xi, j) from the Figure 3 antenna 306_4.

[0403] In addition, in the Fig.15 case, j is an integer from 1 to 4. In the Fig.15 , the number of parameter changes Z is set to Z = 4, but the number of parameter changes Z is not limited to 4. As long as Z is an integer of 1 or more or an integer of 2 or more, it can be implemented in the same way. At this time, j is an integer from 1 to Z.

[0404] As Fig.11 , Fig.15As shown, when the terminal #i of 902_i transmits "reference signal 1101_xi for sector scanning in transmit panel antenna xi", it is assumed that the "reference signal 1501_j using the j-th parameter in transmit panel antenna xi" contains the following information, for example.

[0405] · Information on the "transmit panel antenna and parameters" of base station #1 of 901_1 with good reception quality as described above.

[0406] Therefore, the terminal #i of 902_i transmits the "information on the 'transmit panel antenna and parameters' of base station #1 of 901_1 with good reception quality" in Fig.11 the "reference signal 1101_1 for sector scanning in transmit panel antenna 1", "reference signal 1101_2 for sector scanning in transmit panel antenna 2",..., "reference signal 1101_M for sector scanning in transmit panel antenna M".

[0407] In addition, in the Fig.11 "reference signal 1101_1 for sector scanning in transmit panel antenna 1", "reference signal 1101_2 for sector scanning in transmit panel antenna 2",..., "reference signal 1101_M for sector scanning in transmit panel antenna M" of Fig.15 the terminal #i of 902_i transmits the "information on the 'transmit panel antenna and parameters' of base station #1 of 901_1 with good reception quality" in the "reference signal 1501_1 using the first parameter in transmit panel antenna xi", "reference signal 1501_2 using the second parameter in transmit panel antenna xi", "reference signal 1501_3 using the third parameter in transmit panel antenna xi", "reference signal 1501_4 using the fourth parameter in transmit panel antenna xi".

[0408] In this case, even if base station #1 of 901_1 uses an omni antenna, for example, it can receive the " Fig.11The possibility of any one of the "reference signals 1101_1 for sector scanning in transmission panel antenna 1", "reference signals 1101_2 for sector scanning in transmission panel antenna 2",..., "reference signals 1101_M for sector scanning in transmission panel antenna M" also increases. The reason is that the terminal #i of 902_i performs transmission beamforming (directivity control). Thus, the base station #1 of 901_1 can obtain the following effect, that is, the possibility of receiving the information of the "transmission panel antenna and parameters" of the base station #1 of 901_1 with good reception quality transmitted by the terminal #i of 902_i increases. Therefore, the following effect can be obtained, that is, the base station #1 of 901_1 can transmit a modulation signal to the terminal #i of 902_i based on the information of the "transmission panel antenna and parameters" of the base station #1 of 901_1 with good reception quality, and the terminal #i of 902_i can receive the modulation signal with high reception quality.

[0409] In addition, as in Fig.14 the case where multiple terminals transmit reference signals for sector scanning, the base station #1 of 901_1 can obtain the information of the "transmission panel antenna and parameters" of the base station #1 of 901_1 with good reception quality of multiple terminals. Thus, the following effect can be obtained, that is, the base station #1 of 901_1 can transmit a modulation signal to multiple terminals based on the information of the "transmission panel antenna and parameters" of the base station #1 of 901_1 with good reception quality of multiple terminals, and multiple terminals can receive the modulation signal with high reception quality.

[0410] In addition, as in Fig.11 , Fig.15 shown, when the terminal #i of 902_i transmits the "reference signal 1101_xi for sector scanning in transmission panel antenna xi", the "reference signal 1501_j using the j-th parameter in transmission panel antenna xi" may also include the following information, for example.

[0411] · ID (identification) (identification number) of the transmission panel antenna (here, for example, corresponding to i)

[0412] · ID (identification number) of the parameter used for beamforming (directivity control) (here, for example, corresponding to j)

[0413] The terminal #i of 902_i sends the "ID (identification number) of the transmission panel antenna" and the "ID (identification number) of the parameters used for beamforming (directional control)". The base station #1 of 901_1 can obtain the received "ID (identification number) of the transmission panel antenna" and the "ID (identification number) of the parameters used for beamforming (directional control)". The terminal #i of 902_i and the base station #1 of 901_1 can perform appropriate control, and thus, the effect of improving the reception quality of data can be obtained.

[0414] Fig.16 Shows the situation where Fig.10 An example of the structure of the feedback signal 1002 transmitted by the base station #1 of 901_1 in the time interval from t2 to t3 is shown. In addition, in Fig.16 , the horizontal axis is time. In this example, since the "number of time slots in which the reference signal for sector scanning can be transmitted (the number of terminals that can transmit the reference signal for sector scanning) when the terminal transmits the reference signal for sector scanning" is 4, as Fig.16 shown, in the feedback signal 1002, there are four feedback signals to the terminals: the feedback signal 1601_1 to the first terminal, the feedback signal 1601_2 to the second terminal, the feedback signal 1601_3 to the third terminal, and the feedback signal 1601_4 to the fourth terminal. In addition, for example, when the "number of time slots in which the reference signal for sector scanning can be transmitted (the number of terminals that can transmit the reference signal for sector scanning) when the terminal transmits the reference signal for sector scanning" is Ω, the structure can also be such that there are Ω feedback signals to the terminals in the feedback signal 1002. Here, Ω is an integer of 1 or more or an integer of 2 or more.

[0415] For example, in the case where Fig.14 as shown, the terminal #1 of 902_1 transmits the reference signal 1401_1 for sector scanning, and the terminal #2 of 902_2 transmits the reference signal 1401_2 for sector scanning, the base station #1 of 901_1 uses the feedback signal 1601_1 to the first terminal to send a feedback signal to the terminal #1 of 902_1, and uses the feedback signal 1601_3 to the third terminal to send a feedback signal to the terminal #2 of 902_2.

[0416] At this time, it is assumed that in the feedback signal 1601_1 to the first terminal, for example, it contains the information that communication can be performed with the terminal #1 of 902_1 (or, Fig.10 the frame 1003 containing data symbols contains symbols for the terminal #1 of 902_1).

[0417] Moreover, it is assumed that the feedback signal 1601_3 sent to the third terminal contains, for example, information that can communicate with the terminal #2 of 902_2 (or, Fig.10 the frame 1003 including data symbols contains symbols sent to the terminal #2 of 902_2).

[0418] In addition, based on the information of "the transmission panel antenna and parameters of the base station #1 of 901_1 with good reception quality" sent by the terminal #1 of 902_1, the base station #1 of 901_1 selects a transmission panel antenna, sets the parameters of beamforming, and sends the feedback signal 1601_1 to the first terminal.

[0419] Similarly, based on the information of "the transmission panel antenna and parameters of the base station #1 of 901_1 with good reception quality" sent by the terminal #2 of 902_2, the base station #1 of 901_1 selects a transmission panel antenna, sets the parameters of beamforming, and sends the feedback signal 1601_3 to the third terminal.

[0420] Fig.17 shows an example of the structure of the frame 1003 including data symbols sent by the base station #1 of 901_1 in the time interval from t4 to t5 in Fig.10 . In addition, in Fig.17 , the horizontal axis is time. In this example, since "the number of time slots in which the reference signal for sector scanning can be sent (the number of terminals that can send the reference signal for sector scanning)" when the terminal sends the reference signal for sector scanning is 4, as Fig.17 shown, in the frame 1003 including data symbols, there are four modulation signals (time slots) sent to terminals, namely, the modulation signal (time slot) 1701_1 sent to the first terminal, the modulation signal (time slot) 1701_2 sent to the second terminal, the modulation signal (time slot) 1701_3 sent to the third terminal, and the modulation signal (time slot) 1701_4 sent to the fourth terminal. In addition, for example, when "the number of time slots in which the reference signal for sector scanning can be sent (the number of terminals that can send the reference signal for sector scanning)" is Ω, the structure may also be as follows, that is, in the frame 1003 including data symbols, there are Ω modulation signals (time slots) sent to terminals. Here, Ω is an integer of 1 or more or an integer of 2 or more.

[0421] For example, in Fig.14In this case, when the reference signal 1401_1 for sector scanning is transmitted by the terminal #1 of 902_1 and the reference signal 1401_2 for sector scanning is transmitted by the terminal #2 of 902_2, the base station #1 of 901_1 transmits the modulation signal (time slot) to the terminal #1 of 902_1 using the modulation signal (time slot) 1701_1 sent to the first terminal, and transmits the modulation signal (time slot) to the terminal #2 of 902_2 using the modulation signal (time slot) 1701_3 sent to the third terminal.

[0422] At this time, it is assumed that the modulation signal (time slot) 1701_1 sent to the first terminal contains, for example, data symbols (data, information) sent to the terminal #1 of 902_1.

[0423] Moreover, it is assumed that the modulation signal (time slot) 1701_3 sent to the third terminal contains, for example, data symbols (data, information) sent to the terminal #2 of 902_2.

[0424] In addition, based on the information of the "transmission panel antenna and parameters" of the base station #1 of 901_1 with good reception quality sent by the terminal #1 of 902_1, the base station #1 of 901_1 selects the transmission panel antenna, sets the parameters of beamforming, and transmits the modulation signal (time slot) 1701_1 sent to the first terminal.

[0425] Similarly, based on the information of the "transmission panel antenna and parameters" of the base station #1 of 901_1 with good reception quality sent by the terminal #2 of 902_2, the base station #1 of 901_1 selects the transmission panel antenna, sets the parameters of beamforming, and transmits the modulation signal (time slot) 1701_3 sent to the third terminal.

[0426] In addition, it can also be that in Fig.16 the feedback signal 1601_1 sent to the first terminal contains the information that "the base station #1 of 901_1 receives the sector scanning reference signal 1401_1 sent by the terminal #1 of 902_1 and estimates the 'transmission panel antenna and parameters' of the terminal #1 of 902_1 with good reception quality".

[0427] Thus, based on the information of the "transmission panel antenna and parameters" of the terminal #1 of 902_1 with good reception quality obtained from the base station #1 of 901_1, the terminal #1 of 902_1 selects the transmission panel antenna, sets the beamforming method, and transmits symbols, frames, and / or modulation signals to the base station #1 of 901_1, thereby achieving the effect of improving the reception quality of data in the base station #1 of 901_1.

[0428] Moreover, in Fig.16Among them, the feedback signal 1601_3 sent to the third terminal may also include "Base station #1 of 901_1 receives the sector scan reference signal 1401_2 sent by terminal #2 of 902_2, and estimates the 'transmission panel antenna and parameters' of terminal #2 of 902_2 with good reception quality, this information".

[0429] Thus, based on the information of the "transmission panel antenna and parameters" of terminal #2 of 902_2 with good reception quality obtained from base station #2 of 901_1, terminal #2 of 902_2 selects a transmission panel antenna, sets a beamforming method, and sends symbols, frames, and / or modulation signals to base station #1 of 901_1, thereby being able to achieve the effect of improving the reception quality of data in base station #1 of 901_1.

[0430] In addition, in the time interval from t3 to t4, the terminals, namely terminal #1 of 902_1 and terminal #2 of 902_2 in the above description, may also send a modulation signal containing information such as ACK (acknowledgement) indicating that the signal of base station #1 of 901_1 has been received to base station #1 of 901_1.

[0431] In addition, in Fig.17 the modulation signal (time slot sent to the first terminal) 1701_1 sent to the first terminal, in addition to data symbols, for example, may also include "reference signals such as DMRS (demodulation reference signal), PTRS (phase tracking reference signal), SRS (sounding reference signal)", pilot symbols, pilot signals, preambles, symbols containing control information, etc. In addition, as symbols containing control information, information about the terminal to be the destination of transmission (ID capable of identifying the terminal), the transmission method of the modulation signal, information about the modulation method, information about the error correction coding method (code length, coding rate, etc.), information about MCS (Modulation and Coding Scheme), etc. can be considered.

[0432] Similarly, in the modulation signals sent to the second terminal (time slots sent to the second terminal) 1701_2, the modulation signals sent to the third terminal (time slots sent to the third terminal) 1701_3, and the modulation signals sent to the fourth terminal (time slots sent to the fourth terminal) 1701_4, in addition to data symbols, for example, it may also include "reference signals such as DMRS, PTRS, SRS", pilot symbols, pilot signals, preambles, symbols containing control information, etc. In addition, as the symbols containing control information, information about the terminal that is the transmission destination (ID capable of identifying the terminal), the transmission method of the modulation signal, information about the modulation method, information about the error correction coding method (code length, coding rate, etc.), information about MCS, etc. can be considered.

[0433] Fig.18 shows an example of the situation when the base station #1 of 901_1 communicates with "the terminal #1 of 902_1, the terminal #2 of 902_2, and the terminal #3 of 902_3" as Fig. 9 such. Fig.18 The (A) of shows an example of the transmission situation of the modulation signal of the base station #1 of 901_1, Fig.18 and the (B) of shows an example of the transmission situation of the modulation signals of "the terminal #1 of 902_1, the terminal #2 of 902_2, and the terminal #3 of 902_3". In addition, in Fig.18 the (A) of, Fig.18 the horizontal axis is time in the (B) of.

[0434] First, the base station #1 of 901_1 sends the sector scan reference signal 1801_1. In addition, since this has been described using Fig.10 , the description is omitted.

[0435] Next, terminals such as "the terminal #1 of 902_1, the terminal #2 of 902_2, and the terminal #3 of 902_3" send the sector scan reference signal 1851_1. In addition, since this has been described using Fig.13 , Fig.14 etc., the description is omitted.

[0436] The base station #1 of 901_1 sends the feedback signal 1802_1. In addition, since this has been described using Fig.16 , the description is omitted.

[0437] Then, the base station #1 of 901_1 sends "the frame 1803_1 containing data symbols". In addition, since this has been described using Fig.17 , the description is omitted. (Therefore, the "frame 1803_1 containing data symbols" is regarded as a frame for the downlink, for example.)

[0438] Next, terminals such as "Terminal #1 of 902_1, Terminal #2 of 902_2, Terminal #3 of 902_3" send "Frame 1852_1 containing data symbols". In addition, the structure of this frame will be described later using Fig. 20 for illustration. (Therefore, "Frame 1852_1 containing data symbols" is regarded as a frame for uplink, for example.)

[0439] Next, Base Station #1 of 901_1 sends "Frame 1803_2 containing data symbols". In addition, the method of constructing "Frame 1803_2 containing data symbols" is the method described as using Fig.17 for illustration.

[0440] Next, terminals such as "Terminal #1 of 902_1, Terminal #2 of 902_2, Terminal #3 of 902_3" send "Frame 1852_2 containing data symbols". In addition, the structure of this frame will be described later using Fig. 20 for illustration.

[0441] Fig.19 Shows Fig.18 Examples of the transmission status of the modulation signal of Base Station #1 of 901_1 and the transmission status of the modulation signal of terminals such as "Terminal #1 of 902_1, Terminal #2 of 902_2, Terminal #3 of 902_3" after

[0442] Fig.19 In (A) of, it shows an example of the transmission status of the modulation signal of Base Station #1 of 901_1, which is temporally continuous with Fig.18 the transmission status of the modulation signal of Base Station #1 of 901_1 in (A) of.

[0443] Fig.19 In (B) of, it shows an example of the transmission status of the modulation signal of "Terminal #1 of 902_1, Terminal #2 of 902_2, Terminal #3 of 902_3", which is temporally continuous with Fig.18 the transmission status of the modulation signal of "Terminal #1 of 902_1, Terminal #2 of 902_2, Terminal #3 of 902_3" in (B) of.

[0444] In addition, in Fig.19 in (A) of, Fig.19 in (B) of, the horizontal axis is time.

[0445] In Fig.18 in (A) of, Fig.18 in (B) of, after that, Base Station #1 of 901_1 sends "Frame 1803_3 containing data symbols". In addition, the method of constructing "Frame 1803_2 containing data symbols" is the method described as using Fig.17 for illustration.

[0446] Next, terminals such as "Terminal #1 of 902_1, Terminal #2 of 902_2, Terminal #3 of 902_3" send "Frame 1852_3 containing data symbols". In addition, regarding the structure of this frame, it will be described later using Fig. 20 will be explained.

[0447] Next, Base Station #1 of 901_1 sends Sector Scan Reference Signal 1801_2. In addition, this has been described using Fig.10 will be explained, so the explanation is omitted.

[0448] Next, terminals such as "Terminal #1 of 902_1, Terminal #2 of 902_2, Terminal #3 of 902_3" send Sector Scan Reference Signal 1851_2. In addition, this has been described using Fig.13 , Fig.14 etc., so the explanation is omitted.

[0449] Base Station #1 of 901_1 sends Feedback Signal 1802_2. In addition, this has been described using Fig.16 will be explained, so the explanation is omitted.

[0450] Then, Base Station #1 of 901_1 sends "Frame 1803_4 containing data symbols". In addition, this has been described using Fig.17 will be explained, so the explanation is omitted.

[0451] Next, terminals such as "Terminal #1 of 902_1, Terminal #2 of 902_2, Terminal #3 of 902_3" send "Frame 1852_4 containing data symbols". In addition, regarding the structure of this frame, it will be described later using Fig. 20 will be explained.

[0452] In this way, by having Base Station #1 of 901_1 and the terminals send Sector Scan Reference Signals before "Base Station #1 of 901_1 sends 'Frame containing data symbols', and / or terminals such as 'Terminal #1 of 902_1, Terminal #2 of 902_2, Terminal #3 of 902_3' send 'Frame containing data symbols'", and sending Sector Scan Reference Signals again after "Base Station #1 of 901_1 sends 'Frame containing data symbols', and / or terminals such as 'Terminal #1 of 902_1, Terminal #2 of 902_2, Terminal #3 of 902_3' send 'Frame containing data symbols'", and performing the selection of the transmission panel antenna and the setting of transmission beamforming used, thereby, the following effect can be obtained, that is, the base station and the terminals can obtain high data reception quality.

[0453] Next, using Fig. 20Describe the structural example of "Frame 1852_i containing data symbols" transmitted by terminals such as "Terminal #1 of 902_1, Terminal #2 of 902_2, Terminal #3 of 902_3". In addition, for example, let i be an integer greater than or equal to 1. In Fig. 20 the horizontal axis is time.

[0454] As Fig. 20 shown, "Frame 1852_i containing data symbols" consists of a first time interval, a second time interval, a third time interval, and a fourth time interval.

[0455] Moreover, for example, Terminal #1 of 902_1 uses the first time interval to transmit Frame 2001_1 (containing data symbols). And Terminal #2 of 902_2 uses the third time interval to transmit Frame 2001_2 (containing data symbols).

[0456] In this way, for example, by time-division multiplexing the "Frame 1852_i containing data symbols" transmitted by terminals such as "Terminal #1 of 902_1, Terminal #2 of 902_2, Terminal #3 of 902_3", each terminal transmits a frame, and Base Station #1 of 901_1 receives the frames transmitted by each terminal. Thus, interference can be suppressed, and high data reception quality can be obtained.

[0457] In addition, in Fig. 20 Frame 2001_1, in addition to data symbols, for example, may also include "reference signals such as DMRS, PTRS, SRS", pilot symbols, pilot signals, preambles, symbols containing control information, etc.

[0458] Similarly, in frames such as Frame 2001_1 and Frame 2001_2 in the first time interval, the second time interval, the third time interval, and the fourth time interval, in addition to data symbols, for example, may also include "reference signals such as DMRS, PTRS, SRS", pilot symbols, pilot signals, preambles, symbols containing control information, etc.

[0459] In Fig. 20 it is described the case of time-division multiplexing the frames transmitted by terminals, but frequency-division multiplexing of the frames transmitted by terminals can also be performed, or spatial-division multiplexing using MU-MIMO (Multi User-MIMO (Multiple-Input Multiple-Output)) can be used.

[0460] In Fig.14 it shows the one related to Fig.13Examples related to the occupancy of the terminals in the "Transmission intervals 1301_1 for the sector scan reference signal for the first terminal, 1301_2 for the sector scan reference signal for the second terminal, 1301_3 for the sector scan reference signal for the third terminal, and 1301_4 for the sector scan reference signal for the fourth terminal" shown, while in Fig.21 Examples different from Fig.14 are described, that is, examples related to the occupancy of the terminals in the "Transmission intervals 1301_1 for the sector scan reference signal for the first terminal, 1301_2 for the sector scan reference signal for the second terminal, 1301_3 for the sector scan reference signal for the third terminal, and 1301_4 for the sector scan reference signal for the fourth terminal" shown in Fig.13 are described.

[0461] In Fig.21 , the same reference numerals are attached to the parts performing the same actions as Fig.13 and Fig.14 . Since the description has been given, the description is omitted. Hereinafter, the differences from the description in Fig.14 are described.

[0462] Fig. 9 The terminal #3 of 902_3 can communicate with the base station #1 of 901_1 by receiving the sector scan reference signal 1001 transmitted by the base station #1 of 901_1 and obtaining the "ID (identification) (identification number) of the transmission panel antenna" and the "identification number (ID) of the parameters used for beamforming (directivity control)" with good reception quality.

[0463] The terminal #3 of 902_3 estimates, for example, "transmission panel antenna a3 and parameters b3" as the "transmission panel antenna and parameters" with good reception quality.

[0464] In addition, while estimating the "transmission panel antenna and parameters" with good reception quality, the terminal #3 of 902_3 obtains the information of "the number of time slots in which the sector scan reference signal can be transmitted (the number of terminals that can transmit the sector scan reference signal) when the terminal transmits the sector scan reference signal". In Fig.21 , the terminal #3 of 902_3 obtains the information that "the number of time slots in which the sector scan reference signal can be transmitted (the number of terminals that can transmit the sector scan reference signal) when the terminal transmits the sector scan reference signal" is 4.

[0465] In this case, the terminal #3 of 902_3 obtains a certain value among, for example, "0", "1", "2", and "3" using a random number. For example, assume that the terminal #3 of 902_3 obtains "2" using a random number. In this case, since "2" + 1 = 3, the terminal #3 of 902_3 uses Fig.21 the "sector scan reference signal transmission interval 1301_3 for the 3rd (="2" + 1) terminal" to transmit the sector scan reference signal 2101_3.

[0466] In addition, assume that the sector scan reference signal 2101_3 includes information on the "transmission panel antenna and parameters" with good reception quality obtained by the terminal #3 of 902_3, that is, information on the "transmission panel antenna a3 and parameters b3".

[0467] At this time, as Fig.21 shown, the time intervals between the "sector scan reference signal 1401_2 transmitted by the terminal #2 of 902_2" and the "sector scan reference signal 2101_3 transmitted by the terminal #3 of 902_3" overlap.

[0468] Therefore, there is a possibility that the base station #1 of 901_1 will receive the "sector scan reference signal 1401_2 transmitted by the terminal #2 of 902_2" and the "sector scan reference signal 2101_3 transmitted by the terminal #3 of 902_3" simultaneously.

[0469] In this case, the following two examples can be considered.

[0470] <Example 1>

[0471] Both the "sector scan reference signal 1401_2 transmitted by the terminal #2 of 902_2" and the "sector scan reference signal 2101_3 transmitted by the terminal #3 of 902_3" are Fig.15 of the structure.

[0472] At this time, the "transmission panel antenna and beamforming parameters of the terminal #2 of 902_2 with good reception quality when the base station #1 of 901_1 receives the'sector scan reference signal 1401_2 transmitted by the terminal #2 of 902_2'" and the "transmission panel antenna and beamforming parameters of the terminal #3 of 902_3 with good reception quality when the base station #1 of 901_1 receives the'sector scan reference signal 1401_3 transmitted by the terminal #3 of 902_3'" are different. Therefore, the base station #1 of 901_1 will obtain the information contained in the "sector scan reference signal 1401_2 transmitted by the terminal #2 of 902_2" and the information contained in the "sector scan reference signal 2101_3 transmitted by the terminal #3 of 902_3".

[0473] In this case, for example, "by Fig.16 The feedback signal 1601_1 sent to the first terminal is set as the signal sent to terminal #1 of 902_1, "the feedback signal 1601_2 sent to the second terminal is set as the signal sent to terminal #3 of 902_3", and "the feedback signal 1601_3 sent to the third terminal is set as the signal sent to terminal #2 of 902_2".

[0474] In addition, for example, "set Fig.17 the modulation signal (time slot) 1701_1 sent to the first terminal as the signal sent to terminal #1 of 902_1", "the modulation signal (time slot) 1701_2 sent to the second terminal as the signal sent to terminal #3 of 902_3", and "the modulation signal (time slot) 1701_3 sent to the third terminal as the signal sent to terminal #2 of 902_2".

[0475] Thus, the base station #1 of 901_1 can communicate with (terminal #1 of 902_1), terminal #2 of 902_2, and terminal #3 of 902_3.

[0476] <Example 2>

[0477] Both the sector scan reference signal 1401_2 sent by terminal #2 of 902_2 and the sector scan reference signal 2101_3 sent by terminal #3 of 902_3 are Fig.15 of the structure.

[0478] At this time, assume that "when the base station #1 of 901_1 receives the'sector scan reference signal 1401_2 sent by terminal #2 of 902_2', the parameters of the transmit panel antenna and beamforming of terminal #2 of 902_2 with good reception quality" interfere with "when the base station #1 of 901_1 receives the'sector scan reference signal 1401_3 sent by terminal #3 of 902_3', the parameters of the transmit panel antenna and beamforming of terminal #3 of 902_3 with good reception quality".

[0479] <Example 2-1>

[0480] Sometimes, the base station #1 of 901_1 obtains one of the information contained in the'sector scan reference signal 1401_2 sent by terminal #2 of 902_2' and the information contained in the'sector scan reference signal 2101_3 sent by terminal #3 of 902_3'.

[0481] For example, the base station #1 of 901_1 obtains the information contained in the'sector scan reference signal 1401_2 sent by terminal #2 of 902_2'.

[0482] In this case, for example, "set Fig.16The feedback signal 1601_1 sent to the first terminal is set as the signal sent to terminal #1 of 902_1, and "the feedback signal 1601_3 sent to the third terminal is set as the signal sent to terminal #2 of 902_2".

[0483] In addition, for example, " Fig.17 The modulation signal (time slot) 1701_1 sent to the first terminal is set as the signal sent to terminal #1 of 902_1, and "the modulation signal (time slot) 1701_3 sent to the third terminal is set as the signal sent to terminal #2 of 902_2".

[0484] Thus, base station #1 of 901_1 can communicate with (terminal #1 of 902_1) and terminal #2 of 902_2.

[0485] The operation of terminal #3 of 902_3 will be described.

[0486] Suppose Fig.18 The sector scan reference signal 1851_1 is in Fig.21 such a state. Therefore, in Fig.18 the frames 1803_1, 1803_2, and 1803_3 containing data symbols, there is no frame (time slot) sent to terminal #3 of 902_3.

[0487] In this case, Fig. 9 Terminal #3 of 902_3 can communicate with base station #1 of 901_1 by receiving the Fig.19 sector scan reference signal 1801_2 sent by base station #1 of 901_1 and obtaining the "ID (identification) (identification number) of the transmit panel antenna" and the "identification number (ID) of the parameters used for beamforming (directivity control)" with good reception quality.

[0488] Terminal #3 of 902_3 estimates, for example, "transmit panel antenna a3 and parameter b3" as the "transmit panel antenna and parameters" with good reception quality.

[0489] In addition, while estimating the "transmit panel antenna and parameters" with good reception quality, terminal #3 of 902_3 obtains the information of "the number of time slots (the number of terminals that can transmit the sector scan reference signal) that can transmit the sector scan reference signal when the terminal transmits the sector scan reference signal".

[0490] Terminal #3 of 902_3 obtains the information that "the number of time slots (the number of terminals that can transmit the sector scan reference signal) that can transmit the sector scan reference signal when the terminal transmits the sector scan reference signal" is 4.

[0491] In this case, Terminal #3 of 902_3 obtains a certain value among, for example, "0", "1", "2", "3" using a random number. For example, assume that Terminal #3 of 902_3 generates a random number using, for example, a seed different from the previous time and obtains "3". In this case, since "3" + 1 = 4, Terminal #3 of 902_3 uses Fig. 22 the "sector scan reference signal transmission interval 1301_4 for the 4th (="3" + 1) terminal" to transmit the sector scan reference signal 2201_3.

[0492] In addition, assume that the sector scan reference signal 2201_3 contains information on the "transmission panel antenna and parameters" with good reception quality obtained by Terminal #3 of 902_3, that is, information on "transmission panel antenna a3 and parameters b3".

[0493] At this time, as Fig. 22 shown, Base Station #1 of 901_1 receives the "sector scan reference signal 2201_3 transmitted by Terminal #3 of 902_3", and then performs the specified process, and Base Station #1 of 901_1 communicates with Terminal #3 of 902_3.

[0494] <Example 2-2>

[0495] Base Station #1 of 901_1 sometimes cannot obtain both the information contained in the "sector scan reference signal 1401_2 transmitted by Terminal #2 of 902_2" and the information contained in the "sector scan reference signal 2101_3 transmitted by Terminal #3 of 902_3".

[0496] Assume Fig.18 that the sector scan reference signal 1851_1 is in the state of Fig.21 such that Base Station #1 of 901_1 cannot obtain both the information contained in the "sector scan reference signal 1401_2 transmitted by Terminal #2 of 902_2" and the information contained in the "sector scan reference signal 2101_3 transmitted by Terminal #3 of 902_3". In this case, in the Fig.18 frames 1803_1, 1803_2, and 1803_3 containing data symbols, there are no frames (time slots) destined for Terminal #2 of 902_2 and no frames (time slots) destined for Terminal #3 of 902_3.

[0497] In this case, Fig. 9 Terminal #2 of 902_2 can receive the Fig.19The reference signal 1801_2 for sector scanning, and obtain the "ID (identification number) of the transmitting panel antenna" with good reception quality and the "identification number (ID) of the parameters used for beamforming (directivity control)", and communicate with the base station #1 of 901_1.

[0498] The terminal #2 of 902_2 estimates, for example, "the transmitting panel antenna a2 and the parameter b2" as the "transmitting panel antenna and parameters" with good reception quality.

[0499] In addition, while estimating the "transmitting panel antenna and parameters" with good reception quality, the terminal #2 of 902_2 obtains the information of "the number of time slots in which the reference signal for sector scanning can be transmitted (the number of terminals that can transmit the reference signal for sector scanning)" when the terminal transmits the reference signal for sector scanning.

[0500] The terminal #2 of 902_2 obtains the information that "the number of time slots in which the reference signal for sector scanning can be transmitted (the number of terminals that can transmit the reference signal for sector scanning)" is 4 when the terminal transmits the reference signal for sector scanning.

[0501] In this case, the terminal #2 of 902_2 obtains, for example, one of the values "0", "1", "2", "3" using a random number. For example, assume that the terminal #2 of 902_2 generates a random number using a different seed from the previous time and obtains "2". In this case, since "2" + 1 = 3, the terminal #2 of 902_2 uses Fig. 22 the "reference signal for sector scanning" of the 3rd (= "2" + 1) terminal to send the reference signal 1401_2 for sector scanning in the transmission interval 1301_3.

[0502] In addition, assume that the reference signal 1401_2 for sector scanning contains the information of the "transmitting panel antenna and parameters" with good reception quality obtained by the terminal #2 of 902_2, that is, the information of "the transmitting panel antenna a2 and the parameter b3".

[0503] At this time, as Fig. 22 shown, the base station #1 of 901_1 receives the "reference signal 1401_2 for sector scanning transmitted by the terminal #2 of 902_2", and then performs the specified process, and the base station #1 of 901_1 communicates with the terminal #2 of 902_2.

[0504] Similarly, Fig. 9 the terminal #3 of 902_3 can receive the Fig.19The reference signal 1801_2 for sector scanning, and obtain the "ID (identification number) of the transmitting panel antenna" with good reception quality and the "identification number (ID) of the parameters used for beamforming (directivity control)", and communicate with the base station #1 of 901_1.

[0505] The terminal #3 of 902_3 estimates, for example, "the transmitting panel antenna a3 and the parameter b3" as the "transmitting panel antenna and parameter" with good reception quality.

[0506] In addition, while estimating the "transmitting panel antenna and parameter" with good reception quality, the terminal #3 of 902_3 obtains the information of "the number of time slots in which the reference signal for sector scanning can be transmitted (the number of terminals that can transmit the reference signal for sector scanning)" when the terminal transmits the reference signal for sector scanning.

[0507] The terminal #3 of 902_3 obtains the information that "the number of time slots in which the reference signal for sector scanning can be transmitted (the number of terminals that can transmit the reference signal for sector scanning)" is 4 when the terminal transmits the reference signal for sector scanning.

[0508] In this case, the terminal #3 of 902_3 obtains a certain value among, for example, "0", "1", "2", and "3" using a random number. For example, the terminal #3 of 902_3 generates a random number using a seed different from the previous time and obtains "3". In this case, since "3" + 1 = 4, the terminal #3 of 902_3 uses Fig. 22 the "4th (= "3" + 1) terminal uses the "sector scanning reference signal" transmission interval 1301_4 to transmit the sector scanning reference signal 2201_3.

[0509] In addition, it is assumed that the sector scanning reference signal 2201_3 contains the information of the "transmitting panel antenna and parameter" with good reception quality obtained by the terminal #3 of 902_3, that is, the information of "the transmitting panel antenna a3 and the parameter b3".

[0510] At this time, as Fig. 22 shown, the base station #1 of 901_1 receives the "sector scanning reference signal 2201_3 transmitted by the terminal #3 of 902_3", and then performs the specified process, and the base station #1 of 901_1 communicates with the terminal #3 of 902_3.

[0511] In this way, it is possible to further reduce the collision of the sector scanning reference signals transmitted by each terminal. As a result, it is possible to increase the number of sector scanning reference signals that the base station can receive, and thus it is possible to obtain the following effect, that is, it is possible to increase the number of terminals that communicate with the base station.

[0512] As described in this embodiment, the terminal can obtain the following effect by transmitting the reference signal for sector scanning in a manner that reduces the number of collisions, that is, the communication capacity in the system composed of the base station and the terminal can be improved. In addition, the structures of the terminal and the base station are not limited to Figure 1A , Figure 1B , Figure 1C the structures. In addition, the structures of the transmitting panel antenna and the receiving panel antenna are not limited to Figure 3 , Figure 4 the structures. For example, any structure that can generate one or more transmitting directivities and receiving directivities is acceptable. In addition, in Fig.10 , Fig.11 , Fig.12 , Fig.13 , Fig.14 , Fig.15 , Fig.16 , Fig.17 , Fig.18 , Fig.19 , Fig. 20 , Fig.21 , Fig. 22 there are signals, frames, etc., but the names are not limited to this. What is important is the function of the signal itself being transmitted.

[0513] (Embodiment 2)

[0514] In this embodiment, as a modification of Embodiment 1, an example in the case where the base station transmits multiple modulation signals (multiple streams) to the terminal is described. (That is, an example in the case of implementing MIMO (Multiple-Input Multiple-Output) is described.)

[0515] Fig. 9 An example of the communication state in this embodiment is shown. In addition, since the details have been described, the description is omitted.

[0516] Fig.23 Shows Fig. 9 an example of the modulation signal 2300 transmitted by Base Station #1 of 901_1 in Fig.10 . The same reference numerals are attached to the parts performing the same operations as

[0517] In the time interval from time t0 to time t1, there is the reference signal 1001 for sector scanning.

[0518] The time interval from time t1 to time t2 is the response interval of the terminal.

[0519] In the time interval from time t2 to time t3, there is the feedback signal group 2302. In addition, the feedback signal group 2302 will be described later.

[0520] In the time interval from time t4 to time t5, there is a frame group 2303 including data symbols. In addition, the frame group 2303 including data symbols will be described later.

[0521] Fig.11 Shows Fig. 9 The example of the sector scan reference signal 1001 transmitted by base station #1 of Fig.23 . In addition, since the operation of Fig.11 has been described, the description is omitted.

[0522] Fig.12 Shows Fig.11 The structural example of the "sector scan reference signal 1101_i in transmission panel antenna i". In addition, since the operation of Fig.12 has been described, the description is omitted.

[0523] Fig.13 Shows the operation example in the terminal response interval, that is, the time interval from time t1 to time t2. In addition, since the operation of Fig.13 has been described, the description is omitted.

[0524] Fig.14 Shows the example related to the occupation of the terminal of Fig.13 shown as "sector scan reference signal transmission interval 1301_1 for the first terminal, sector scan reference signal transmission interval 1301_2 for the second terminal, sector scan reference signal transmission interval 1301_3 for the third terminal, sector scan reference signal transmission interval 1301_4 for the fourth terminal". In addition, since the operation of Fig.14 has been described, the different parts of the operation in this embodiment are described.

[0525] Assume Fig. 9 The terminal #1 of 902_1, for example, wants to receive multiple modulated signals from the base station #1 of 901_1. Here, assume Fig. 9 The terminal #1 of 902_1 wants to receive two modulated signals from the base station #1 of 901_1. In this case, Fig. 9 The terminal #1 of 902_1 receives the sector scan reference signal 1001 transmitted by the base station #1 of 901_1 and estimates two "transmission panel antennas and parameter numbers" with good reception quality in the transmission panel antenna of the base station #1 of 901_1.

[0526] At this time, the two "transmission panel antennas and parameter numbers" with good reception quality are referred to as the first "transmission panel antenna and parameter number" and the second "transmission panel antenna and parameter number". Moreover, it is assumed that the "transmission panel antenna of the first 'transmission panel antenna and parameter number'" is different from the "transmission panel antenna of the second 'transmission panel antenna and parameter number'".

[0527] In addition, this estimation can be performed by obtaining the sector scan reference signal 1001 and the "ID (identification number) of the transmission panel antenna" and the "identification number (ID) of the parameters used for beamforming (directivity control)" included in the sector scan reference signal 1001.

[0528] For example, it is assumed that the terminal #1 of 902_1 estimates the two "transmission panel antennas and parameters" with good reception quality as "transmission panel antenna a1_1 and parameter b1_1" and "transmission panel antenna a1_2 and parameter b1_2". (In addition, when using the following Fig.24 for explanation, the "transmission panel antenna a1_1" is set as Figure 1A , Figure 1B , Figure 1C , the transmission panel antenna 1 of 106_1 of the base station #1 of (901_1), and the "transmission panel antenna a1_2" is set as Figure 1A , Figure 1B , Figure 1C , the transmission panel antenna 2 of 106_2 of the base station #1 of (901_1).)

[0529] In addition, while estimating the "transmission panel antennas and parameters" with good reception quality, the terminal #1 of 902_1 obtains information on "the number of time slots in which the sector scan reference signal can be transmitted (the number of terminals that can transmit the sector scan reference signal) when the terminal transmits the sector scan reference signal". In the case of Fig.14 , the terminal #1 of 902_1 obtains the information that "the number of time slots in which the sector scan reference signal can be transmitted (the number of terminals that can transmit the sector scan reference signal) when the terminal transmits the sector scan reference signal" is 4.

[0530] In this case, the terminal #1 of 902_1 obtains a certain value among, for example, "0", "1", "2", "3" using a random number. For example, it is assumed that the terminal #1 of 902_1 obtains "0" using a random number. In this case, since "0" + 1 = 1, the terminal #1 of 902_1 uses the Fig.14 "sector scan reference signal transmission interval 1301_1 for the first (= "0" + 1) terminal" to transmit the sector scan reference signal 1401_1.

[0531] In addition, assume that the terminal #1 of 902_1 included in the sector scan reference signal 1401_1 obtains information on "transmission panel antenna and parameters" with good reception quality, that is, information on "transmission panel antenna a1_1 and parameters b1_1" and information on "transmission panel antenna a1_2 and parameters b1_2". Additionally, the sector scan reference signal 1401_1 may also include a request message (here "2") from the terminal #1 of 902_1 for the number of "modulation signals (streams) transmitted by the base station #1 of 901_1".

[0532] Similarly, Fig. 9 The terminal #2 of 902_2 receives the sector scan reference signal 1001 transmitted by the base station #1 of 901_1, and estimates the "transmission panel antenna and parameter number" with good reception quality in the transmission panel antennas of the base station #1 of 901_1. In addition, this estimation can be performed by obtaining the sector scan reference signal 1001 and the "ID (identification) (identification number) of the transmission panel antenna" and the "identification number (ID) of the parameters used for beamforming (directivity control)" included in this sector scan reference signal 1001.

[0533] Assume that the terminal #2 of 902_2 estimates, for example, "transmission panel antenna a2_1 and parameters b2_1" as the "transmission panel antenna and parameters" with good reception quality. (In addition, when explaining below using Fig.24 set "transmission panel antenna a2_1" as Figure 1A , Figure 1B , Figure 1C the transmission panel antenna 3 of 106_1 (of the base station #1 of 901_1).)

[0534] In addition, while estimating the "transmission panel antenna and parameters" with good reception quality, the terminal #2 of 902_2 obtains information on "the number of time slots in which the sector scan reference signal can be transmitted (the number of terminals that can transmit the sector scan reference signal)" when the terminal transmits the sector scan reference signal. In the case of Fig.14 the terminal #2 of 902_2 obtains the information that "the number of time slots in which the sector scan reference signal can be transmitted (the number of terminals that can transmit the sector scan reference signal)" is 4.

[0535] In this case, assume that the terminal #2 of 902_2 obtains a certain value among, for example, "0", "1", "2", "3" using a random number. For example, the terminal #2 of 902_2 obtains "2" using a random number. In this case, since "2" + 1 = 3, the terminal #2 of 902_2 uses Fig.14The "sector scanning reference signal" transmission section 1301_3 for the 3rd (="2"+1) terminal is used to transmit the sector scanning reference signal 1401_2.

[0536] In addition, it is assumed that the sector scanning reference signal 1401_2 contains information on the "transmission panel antenna and parameters" with good reception quality obtained by the terminal #2 of 902_2, that is, information on the "transmission panel antenna a2 and parameters b2". This will be described later. That is, it is assumed to contain information on the "transmission panel antenna a2_1 and parameters b2_1". In addition, the sector scanning reference signal 1401_2 may also contain a request message (here, "1") from the terminal #2 of 902_2 for the "number of modulation signals (streams) transmitted by the base station #1 of 901_1".

[0537] In this way, it is possible to reduce the conflict of the sector scanning reference signals transmitted by each terminal. As a result, it is possible to increase the number of sector scanning reference signals that the base station can receive, and thus the following effect can be obtained, that is, it is possible to increase the number of terminals communicating with the base station. In addition, as described above, the base station can transmit one or more modulation signals (streams) to each terminal.

[0538] For the already used Fig.14 The structure of the sector scanning reference signal 1401_i transmitted by the terminal #i of 902_i described above will be described. In addition, for simplicity of description, it is assumed that the terminal #i of 902_i has Figure 1A , Figure 1B , Figure 1C structure. In addition, it is assumed that the terminal #i of 902_i having Figure 1A , Figure 1B , Figure 1C structure has Figure 3 structure as the transmission panel antenna xi of 106_xi. However, the structure of the terminal #i of 902_i is not limited to Figure 1A , Figure 1B , Figure 1C structure. In addition, the structure of the terminal #i of 902_i having Figure 1A , Figure 1B , Figure 1C structure having the transmission panel antenna xi of 106_xi is not limited to Figure 3 .

[0539] Fig.11 FIG. shows an example of the sector scanning reference signal 1401_i transmitted by the terminal #i of 902_i. In addition, in Fig.11 , the horizontal axis is time.

[0540] For example, having Figure 1A , Figure 1B , Figure 1CThe terminal #i of the structure 902_i transmits the sector scan reference signal 1101_1 in the transmission panel antenna 1 from the transmission panel antenna 1 of 106_1.

[0541] Therefore, as Fig.11 shown, the terminal #i of the structure 902_i having Figure 1A , Figure 1B , Figure 1C transmits the sector scan reference signal 1101_xi in the transmission panel antenna xi from the transmission panel antenna xi of 106_xi. Here, xi is an integer of 1 or more and M or less.

[0542] Fig.15 shows Fig.11 an example of the structure of the "sector scan reference signal 1101_xi in the transmission panel antenna xi". In addition, since the operation of Fig.15 has been described, the description is omitted.

[0543] Fig.24 shows an example of the structure of the feedback signal group 2302 transmitted by the base station #1 of 901_1 in the time interval from t2 to t3 in Fig.23 . In addition, in Fig.24 , the horizontal axis is time. In addition, for simplicity of explanation, it is assumed that the base station 1 of 901_1 includes four transmission panel antennas: the transmission panel antenna 1 of 106_1, the transmission panel antenna 2 of 106_2, the transmission panel antenna 3 of 106_3, and the transmission panel antenna 4 of 106_4.

[0544] In this example, since "the number of time slots in which the sector scan reference signal can be transmitted (the number of terminals that can transmit the sector scan reference signal) when the terminal transmits the sector scan reference signal" is 4, as Fig.24 shown, in the feedback signal 2302, there are four feedback signal groups to the terminals: the feedback signal group 2400_1 to the first terminal, the feedback signal group 2400_2 to the second terminal, the feedback signal group 2400_3 to the third terminal, and the feedback signal group 2400_4 to the fourth terminal. In addition, for example, when "the number of time slots in which the sector scan reference signal can be transmitted (the number of terminals that can transmit the sector scan reference signal) when the terminal transmits the sector scan reference signal" is Ω, the structure can also be as follows: in the feedback signal group 2302, there are Ω feedback signal groups to the terminals. Here, Ω is an integer of 1 or more or an integer of 2 or more.

[0545] In addition, it is described as a "feedback signal group" because a feedback signal can exist in the transmission panel antenna 1 of 106_1, a feedback signal can exist in the transmission panel antenna 2 of 106_2, a feedback signal can exist in the transmission panel antenna 3 of 106_3, and a feedback signal can exist in the transmission panel antenna 4 of 106_4.

[0546] For example, in the case where, as Fig.14 such, the terminal #1 of 902_1 transmits the sector scan reference signal 1401_1 and the terminal #2 of 902_2 transmits the sector scan reference signal 1401_2, the base station #1 of 901_1 uses the feedback signal group 2400_1 destined for the first terminal to transmit a feedback signal group to the terminal #1 of 902_1, and uses the feedback signal group 2400_3 destined for the third terminal to transmit a feedback signal group to the terminal #2 of 902_2.

[0547] As Fig.24 shown, the feedback signal group 2400_1 destined for the first terminal is composed of the "feedback signal (1) destined for the terminal #1 of 902_1" of 2401_1 transmitted from the transmission panel antenna 1 of 106_1 of the base station #1 of 901_1 and the "feedback signal (2) destined for the terminal #1 of 902_1" of 2401_2 transmitted from the transmission panel antenna 2 of 106_2 of the base station #1 of 901_1.

[0548] In this way, the reason why the feedback signal group 2400_1 destined for the first terminal is composed of the "feedback signal (1) destined for the terminal #1 of 902_1" of 2401_1 and the "feedback signal (2) destined for the terminal #1 of 902_1" of 2401_2 is that "the base station #1 of 901_1 transmits two modulation signals (streams) to the terminal #1 of 902_1".

[0549] Moreover, as Fig.24 shown, the feedback signal group 2400_3 destined for the third terminal is composed of the "feedback signal destined for the terminal #2 of 902_2" of 2402_1 transmitted from the transmission panel antenna 3 of 106_3 of the base station #1 of 901_1.

[0550] At this time, it is assumed that in the "feedback signal (1) destined for the terminal #1 of 902_1", for example, it contains the information that (the base station #1 of 901_1) and the terminal #1 of 902_1 can communicate using the transmission panel antenna 1 of 106_1.

[0551] In addition, it is assumed that in the "feedback signal (2) destined for the terminal #1 of 902_1", for example, it contains the information that (the base station #1 of 901_1) and the terminal #1 of 902_1 can communicate using the transmission panel antenna 2 of 106_2.

[0552] In addition, assume that in the "feedback signal of terminal #2 sent to 902_2", for example, it contains the information that the base station #1 of (901_1) and terminal #2 of 902_2 can communicate using the transmission panel antenna 3 of 106_3.

[0553] Furthermore, based on the "information on the'sending panel antenna and parameters' of two base stations #1 of 901_1 with good reception quality sent by terminal #1 of 902_1", the base station #1 of 901_1 selects a sending panel antenna, sets the parameters of beamforming, and sends a feedback signal 2400_1 to the first terminal. (This is the reason for using two sending panel antennas.)

[0554] Similarly, based on the "information on the'sending panel antenna and parameters' of the base station #1 of 901_1 with good reception quality sent by terminal #2 of 902_2", the base station #1 of 901_1 selects a sending panel antenna, sets the parameters of beamforming, and sends a feedback signal 2400_3 to the third terminal.

[0555] Fig.25 Shows the situation in Fig.23 An example of the structure of the frame group 2303 containing data symbols sent by the base station #1 of 901_1 in the time interval from t4 to t5. In addition, in Fig.25 the horizontal axis is time.

[0556] In this example, since the number of time slots (number of terminals that can send the reference signal for sector scanning) in which the reference signal for sector scanning can be sent when the terminal sends the reference signal for sector scanning is 4, as Fig.25 shown, in the frame group 2303 containing data symbols, there are four modulation signal (time slot) groups sent to terminals, namely, the modulation signal (time slot) group 2500_1 sent to the first terminal, the modulation signal (time slot) group 2500_2 sent to the second terminal, the modulation signal (time slot) group 2500_3 sent to the third terminal, and the modulation signal (time slot) group 2500_4 sent to the fourth terminal. In addition, for example, when the number of time slots (number of terminals that can send the reference signal for sector scanning) in which the reference signal for sector scanning can be sent when the terminal sends the reference signal for sector scanning is Ω, the structure can also be as follows, that is, in the frame group 2303 containing data symbols, there are Ω modulation signal (time slot) groups sent to terminals. Here, Ω is an integer of 1 or more or an integer of 2 or more.

[0557] In addition, it is called "a group of frames including data symbols" because frames including data symbols can exist in the transmission panel antenna 1 of 106_1, frames including data symbols can exist in the transmission panel antenna 2 of 106_2, frames including data symbols can exist in the transmission panel antenna 3 of 106_3, and frames including data symbols can exist in the transmission panel antenna 4 of 106_4.

[0558] For example, in the case where, as Fig.14 shown, the terminal #1 of 902_1 transmits the sector scan reference signal 1401_1 and the terminal #2 of 902_2 transmits the sector scan reference signal 1401_2, the base station #1 of 901_1 uses the modulation signal (time slot) group 2500_1 destined for the first terminal to transmit the modulation signal (time slot) group to the terminal #1 of 902_1, and uses the modulation signal (time slot) 2500_3 destined for the third terminal to transmit the modulation signal (time slot) group to the terminal #2 of 902_2.

[0559] As Fig.25 shown, the modulation signal (time slot) group 2500_1 destined for the first terminal is composed of the "modulation signal (time slot) (1) destined for the terminal #1 of 902_1" of 2501_1 transmitted from the transmission panel antenna 1 of 106_1 of the base station #1 of 901_1 and the "modulation signal (time slot) (2) destined for the terminal #1 of 902_1" of 2501_2 transmitted from the transmission panel antenna 2 of 106_2 of the base station #1 of 901_1.

[0560] Thus, the reason why the modulation signal (time slot) group 2500_1 destined for the first terminal is composed of the "modulation signal (time slot) (1) destined for the terminal #1 of 902_1" of 2501_1 and the "modulation signal (time slot) (2) destined for the terminal #1 of 902_1" of 2501_2 is that "the base station #1 of 901_1 transmits two modulation signals (streams) to the terminal #1 of 902_1".

[0561] Moreover, as Fig.25 shown, the modulation signal (time slot) 2500_3 destined for the third terminal is composed of the "modulation signal (time slot) destined for the terminal #2 of 902_2" of 2502_1 transmitted from the transmission panel antenna 3 of 106_3 of the base station #1 of 901_1.

[0562] At this time, it is assumed that, for example, the "modulation signal (time slot) (1) destined for the terminal #1 of 902_1" includes data symbols (data, information) destined for the terminal #1 of 902_1.

[0563] In addition, assume that in the "modulation signal (time slot) (2) of terminal #1 sent to 902_1", for example, it also contains data symbols (data, information) of terminal #1 sent to 902_1.

[0564] In addition, assume that in the "modulation signal (time slot) of terminal #2 sent to 902_2", for example, it contains data symbols (data, information) of terminal #2 sent to 902_2.

[0565] In addition, based on the information of "transmission panel antennas and parameters" of two base stations #1 of 901_1 with good reception quality sent by terminal #1 of 902_1, base station #1 of 901_1 selects a transmission panel antenna, sets beamforming parameters, and sends a group 2500_1 of modulation signals (time slots sent to the first terminal). (This is the reason for using two transmission panel antennas.)

[0566] Similarly, based on the information of "transmission panel antennas and parameters" of base station #1 of 901_1 with good reception quality sent by terminal #2 of 902_2, base station #1 of 901_1 selects a transmission panel antenna, sets beamforming parameters, and sends a modulation signal (time slot sent to the first terminal) 2500_3 to the third terminal.

[0567] In addition, in Fig.25 In the group 2500_1 of modulation signals (time slots sent to the first terminal), in addition to data symbols, for example, it may also contain "reference signals such as DMRS, PTRS, SRS", pilot symbols, pilot signals, preambles, symbols containing control information, etc. In addition, as symbols containing control information, information of the terminal to be the destination (ID capable of identifying the terminal), transmission method of the modulation signal, information of the modulation method, information of the error correction coding method (code length, coding rate, etc.), information of MCS, etc. can be considered.

[0568] Similarly, in the group 2500_2 of modulation signals (time slots sent to the second terminal), the group 2500_3 of modulation signals (time slots sent to the third terminal), and the group 2500_4 of modulation signals (time slots sent to the fourth terminal), in addition to data symbols, for example, it may also contain "reference signals such as DMRS, PTRS, SRS", pilot symbols, pilot signals, preambles, symbols containing control information, etc. In addition, as symbols containing control information, information of the terminal to be the destination (ID capable of identifying the terminal), transmission method of the modulation signal, information of the modulation method, information of the error correction coding method (code length, coding rate, etc.), information of MCS, etc. can be considered.

[0569] Fig.26 Shows Fig. 9An example of the situation when the base station #1 of 901_1 communicates with "the terminal #1 of 902_1 and the terminal #2 of 902_2". Fig.26 (A) of shows an example of the transmission status of the modulation signal of the base station #1 of 901_1, Fig.26 (B) of shows an example of the transmission status of the modulation signals of "the terminal #1 of 902_1 and the terminal #2 of 902_2". In addition, in Fig.26 (A) of, Fig.26 (B) of, the horizontal axis is time. In addition, in Fig.26 , parts that perform the same actions as Fig.18 are given the same reference numerals.

[0570] First, the base station #1 of 901_1 transmits the sector scan reference signal 1801_1. In addition, this has been described using Fig.23 , so the description is omitted.

[0571] Next, terminals such as "the terminal #1 of 902_1 and the terminal #2 of 902_2" transmit the sector scan reference signal 1851_1. In addition, this has been described using Fig.13 , Fig.14 etc., so the description is omitted.

[0572] The base station #1 of 901_1 transmits the feedback signal group 2602_1. In addition, this has been described using Fig.24 , so the description is omitted.

[0573] Then, the base station #1 of 901_1 transmits "the frame group 2603_1 containing data symbols". In addition, this has been described using Fig.25 , so the description is omitted. (Therefore, the "frame 2603_1 containing data symbols" is regarded as a frame for the downlink, for example.)

[0574] Next, terminals such as "the terminal #1 of 902_1 and the terminal #2 of 902_2" transmit "the frame group 2652_1 containing data symbols". In addition, the structure of this frame will be described later using Fig.28 . (Therefore, the "frame group 2652_1 containing data symbols" is regarded as a frame for the uplink, for example.)

[0575] Next, the base station #1 of 901_1 transmits "the frame group 2603_2 containing data symbols". In addition, the method of constructing the "frame group 2603_2 containing data symbols" is the method as described using Fig.24 .

[0576] Next, terminals such as "Terminal #1 of 902_1, Terminal #2 of 902_2" send "Frame group 2652_2 containing data symbols". In addition, the structure of this frame will be described later using Fig.28 for the description.

[0577] Fig. 27 shows Fig.26 Examples of the transmission status of the modulation signal of Base Station #1 of 901_1 and the transmission status of the modulation signal of terminals such as "Terminal #1 of 902_1, Terminal #2 of 902_2" after that. In addition, in Fig. 27 the parts that perform the same operation as Fig.18 are attached with the same reference numerals.

[0578] Fig. 27 The (A) of Fig.26 shows an example of the transmission status of the modulation signal of Base Station #1 of 901_1, which is temporally consecutive to the transmission status of the modulation signal of Base Station #1 of 901_1 in the (A) of

[0579] Fig. 27 The (B) of Fig.26 shows an example of the transmission status of the modulation signal of "Terminal #1 of 902_1, Terminal #2 of 902_2", which is temporally consecutive to the transmission status of the modulation signal of "Terminal #1 of 902_1, Terminal #2 of 902_2, Terminal #3 of 902_3" in the (B) of

[0580] In addition, in Fig. 27 the (A) of Fig. 27 the horizontal axis is time.

[0581] In Fig.26 the (A) of Fig.26 after the (B) of Fig.25 Base Station #1 of 901_1 sends "Frame group 2603_3 containing data symbols". In addition, the method of constructing "Frame group 2603_2 containing data symbols" is the method as described in the description using

[0582] Next, terminals such as "Terminal #1 of 902_1, Terminal #2 of 902_2" send "Frame group 2652_3 containing data symbols". In addition, the structure of this frame will be described later using Fig.28 for the description.

[0583] Next, Base Station #1 of 901_1 sends the sector scan reference signal 1801_2. In addition, this has been described using Fig.23 for the description, so the description is omitted.

[0584] Next, terminals such as "Terminal #1 of 902_1 and Terminal #2 of 902_2" send the sector scan reference signal 1851_2. In addition, this has been described using Fig.13 , Fig.14 etc., so the description is omitted.

[0585] The base station #1 of 901_1 sends the feedback signal group 2602_2. In addition, this has been described using Fig.24 , so the description is omitted.

[0586] Then, the base station #1 of 901_1 sends "Frame group 2603_4 containing data symbols". In addition, this has been described using Fig.25 , so the description is omitted.

[0587] Next, terminals such as "Terminal #1 of 902_1 and Terminal #2 of 902_2" send "Frame group 2652_4 containing data symbols". In addition, for the structure of this frame, it will be described later using Fig.28 .

[0588] In this way, before "The base station #1 of 901_1 sends 'Frame group containing data symbols', and / or

[0589] 'Terminal #1 of 902_1 and Terminal #2 of 902_2' etc. terminals send 'Frame group containing data symbols'", the base station #1 of 901_1 and the terminals send the sector scan reference signal, and after "The base station #1 of 901_1 sends 'Frame group containing data symbols', and / or 'Terminal #1 of 902_1 and Terminal #2 of 902_2' etc. terminals send 'Frame group containing data symbols'", the sector scan reference signal is sent again, and the selection of the transmission panel antenna and the setting of the transmission beamforming are performed. Thus, the following effect can be obtained, that is, the base station and the terminals can obtain high data reception quality.

[0590] Next, use Fig.28 to illustrate the structural example of "Frame group 2652_i containing data symbols" sent by terminals such as "Terminal #1 of 902_1 and Terminal #2 of 902_2". In addition, for example, let i be an integer of 1 or more. In Fig.28 , the horizontal axis is time.

[0591] As Fig.28 shown, "Frame group 2652_i containing data symbols" is composed of a first time interval, a second time interval, a third time interval, and a fourth time interval.

[0592] Moreover, for example, the terminal #1 of 902_1 uses the first time interval to transmit a frame group 2801_1 (including data symbols). Moreover, the terminal #2 of 902_2 uses the third time interval to transmit a frame group 2801_2 (including data symbols).

[0593] In addition, it may also be that, similar to the case where the base station #1 of 901_1 transmits multiple modulated signals, for example, when the terminal #1 of 902_1 transmits the frame group 2801_1 to the base station #1 of 901_1, the terminal #1 of 902_1 uses multiple transmission panel antennas to transmit multiple modulated signals (time slots) to the base station #1 of 901_1. Fig.25 In addition, it may also be that, when the terminal #1 of 902_1 transmits the frame group 2801_1 to the base station #1 of 901_1, the terminal #1 of 902_1 transmits one modulated signal (time slot) to the base station #1 of 901_1.

[0594] In this way, for example, by time-division multiplexing the "frame group 2652_i including data symbols" transmitted by terminals such as "the terminal #1 of 902_1 and the terminal #2 of 902_2", each terminal transmits a frame group, and the base station #1 of 901_1 receives the frame groups transmitted by each terminal. Thus, interference can be suppressed, and therefore, high data reception quality can be obtained.

[0596] In addition, in the frame group 2801_1, in addition to data symbols, for example, it may also include "reference signals such as DMRS, PTRS, and SRS", pilot symbols, pilot signals, preambles, symbols including control information, etc.

[0597] In addition, in Fig.28 Similarly, in the frames in the first time interval, the second time interval, the third time interval, and the fourth time interval such as the frame group 2801_1 and the frame group 2801_2, in addition to data symbols, for example, it may also include "reference signals such as DMRS, PTRS, and SRS", pilot symbols, pilot signals, preambles, symbols including control information, etc.

[0598] In

[0599] In Fig.28 it is described the case of time-division multiplexing the frame groups transmitted by terminals, but the frame groups transmitted by terminals can be frequency-division multiplexed, or space-division multiplexing using MU-MIMO can be used.

[0600] As described in this embodiment, the terminal transmits the reference signal for sector scanning in a manner that reduces the number of collisions, and the following effects can be obtained, that is, the communication capacity in the system composed of the base station and the terminal can be improved. In addition, the structures of the terminal and the base station are not limited to Figure 1A 、 Figure 1B 、 Figure 1C The structure. In addition, the structures of the transmitting panel antenna and the receiving panel antenna are not limited to Figure 3 , Figure 4 the structure. For example, any structure that can generate one or more transmitting directivities and receiving directivities is acceptable. In addition, in Fig.10 , Fig.11 , Fig.12 , Fig.13 , Fig.14 , Fig.15 , Fig.16 , Fig.17 , Fig.18 , Fig.19 , Fig. 20 , Fig.21 , Fig. 22 , Fig.23 , Fig.24 , Fig.25 , Fig.26 , Fig. 27 , Fig.28 , there are signals, frames, etc., but the names are not limited to these. What is important is the function of the signal itself being transmitted.

[0601] (Embodiment 3)

[0602] In this embodiment, modifications of Embodiment 1 and Embodiment 2 will be described. In addition, hereinafter, the figures shown in Embodiment 1 and / or Embodiment 2 may be sometimes referred to for description. In this case, the description of a part of the figures shown in Embodiment 1 and / or Embodiment 2 may be sometimes omitted.

[0603] Fig.29 An example of the communication state in this embodiment is shown. In Fig.29 , the parts performing the same operations as those in Fig. 9 are assigned the same reference numerals and the description thereof is omitted.

[0604] In Fig.29 , the base station #1 of 901_1 communicates with not only the terminals #1 to #3 but also the terminals #4 of 2902_4, the terminals #5 of 2902_5, and the terminals #6 of 2902_6.

[0605] Fig.30 An example of the modulation signal 3000 transmitted by the base station #1 of 901_1 in Fig.29 is shown. In addition, the parts performing the same operations as those in Fig.10 are assigned the same reference numerals and the description thereof is omitted.

[0606] In the time interval from time t0 to time t1, there is the sector scan reference signal 1001.

[0607] The time interval from time t1 to time t2 is the response interval of the terminal.

[0608] In the time interval from time t2 to time t3, there is a feedback signal group 3002. In addition, the feedback signal group 3002 will be described later.

[0609] In the time interval from time t4 to time t5, there is a frame group 3003 including data symbols. In addition, the frame group 3003 including data symbols will be described later.

[0610] Fig.11 Shows Fig.29 Sent by base station #1 of Fig.30 Example of the sector scan reference signal 1001. In addition, for Fig.11 The operation has been described, so the description is omitted.

[0611] Fig.12 Shows Fig.11 Structural example of the "sector scan reference signal 1101_i in transmission panel antenna i". In addition, for Fig.12 The operation has been described, so the description is omitted.

[0612] Fig.13 Shows an example of the operation in the time interval from time t1 to time t2, which is the terminal response interval. In addition, for Fig.13 The operation has been described, so the description is omitted.

[0613] Fig.14 Shows the Fig.13 Shown "sector scan reference signal transmission interval 1301_1 for the first terminal, sector scan reference signal transmission interval 1301_2 for the second terminal, sector scan reference signal transmission interval 1301_3 for the third terminal, sector scan reference signal transmission interval 1301_4 for the fourth terminal" related example of terminal occupancy. In addition, for Fig.14 The operation has been described in Embodiment 1, Embodiment 2, etc., so the description is omitted.

[0614] Fig.15 Shows Fig.11 Structural example of the "sector scan reference signal 1101_xi in transmission panel antenna xi". In addition, for Fig.15 The operation has been described, so the description is omitted.

[0615] Fig.31A , Fig.31B , Fig.31C And Fig.31D Shows being in Fig.30An example of the structure of the feedback signal group 3002 transmitted by base station #1 of 901_1 in the time interval from t2 to t3. In addition, in Fig.31A , Fig.31B , Fig.31C and Fig.31D , the horizontal axis is time. In addition, for simplicity of explanation, it is assumed that base station #1 of 901_1 has four transmit panel antennas, namely, transmit panel antenna 1 of 106_1, transmit panel antenna 2 of 106_2, transmit panel antenna 3 of 106_3, and transmit panel antenna 4 of 106_4.

[0616] Moreover, Fig.31A is a diagram related to the feedback signal of transmit panel antenna 1 of 106_1 in the feedback signal group 3002. Fig.31B is a diagram related to the feedback signal of transmit panel antenna 2 of 106_2 in the feedback signal group 3002. Fig.31C is a diagram related to the feedback signal of transmit panel antenna 3 of 106_3 in the feedback signal group 3002. Fig.31D is a diagram related to the feedback signal of transmit panel antenna 4 of 106_4 in the feedback signal group 3002.

[0617] In Fig.31A 's example, since "the number of time slots in which the terminal can transmit the reference signal for sector scanning (the number of terminals that can transmit the reference signal for sector scanning)" is 4, as Fig.31A shows, in the feedback signal of transmit panel antenna 1 in the feedback signal group 3002 of 3100_1, there are four feedback signal groups for terminals, namely, feedback signal group 3101_11 sent to the first terminal, feedback signal group 3101_12 sent to the second terminal, feedback signal group 3101_13 sent to the third terminal, and feedback signal group 3101_14 sent to the fourth terminal. In addition, for example, when "the number of time slots in which the terminal can transmit the reference signal for sector scanning (the number of terminals that can transmit the reference signal for sector scanning)" is Ω, the structure can also be as follows: in the feedback signal of transmit panel antenna 1 in the feedback signal group 3002 of 3100_1, there are Ω feedback signal groups for terminals. Here, Ω is an integer of 1 or more or an integer of 2 or more.

[0618] In addition, it is described as a "feedback signal group" because: it is possible to have the feedback signal for transmit panel antenna 1 of 106_1, it is possible to have the feedback signal for transmit panel antenna 2 of 106_2, it is possible to have the feedback signal for transmit panel antenna 3 of 106_3, and it is possible to have the feedback signal for transmit panel antenna 4 of 106_4.

[0619] In Fig.31B In the example, since "the number of time slots in which the reference signal for sector scanning can be transmitted (the number of terminals that can transmit the reference signal for sector scanning) when the terminal transmits the reference signal for sector scanning" is 4, so as Fig.31B shown, in the feedback signal of the transmit panel antenna 2 in the feedback signal group 3002 of 3100_2, there are four feedback signal groups for terminals, namely, the feedback signal group 3101_21 for the first terminal, the feedback signal group 3101_22 for the second terminal, the feedback signal group 3101_23 for the third terminal, and the feedback signal group 3101_24 for the fourth terminal. In addition, for example, when "the number of time slots in which the reference signal for sector scanning can be transmitted (the number of terminals that can transmit the reference signal for sector scanning) when the terminal transmits the reference signal for sector scanning" is Ω, it can also be the following structure, that is, in the feedback signal of the transmit panel antenna 2 in the feedback signal group 3002 of 3100_2, there are Ω feedback signal groups for terminals. Here, Ω is an integer of 1 or more or an integer of 2 or more.

[0620] In Fig.31C the example, since "the number of time slots in which the reference signal for sector scanning can be transmitted (the number of terminals that can transmit the reference signal for sector scanning) when the terminal transmits the reference signal for sector scanning" is 4, so as Fig.31C shown, in the feedback signal of the transmit panel antenna 3 in the feedback signal group 3002 of 3100_3, there are four feedback signal groups for terminals, namely, the feedback signal group 3101_31 for the first terminal, the feedback signal group 3101_32 for the second terminal, the feedback signal group 3101_33 for the third terminal, and the feedback signal group 3101_34 for the fourth terminal. In addition, for example, when "the number of time slots in which the reference signal for sector scanning can be transmitted (the number of terminals that can transmit the reference signal for sector scanning) when the terminal transmits the reference signal for sector scanning" is Ω, it can also be the following structure, that is, in the feedback signal of the transmit panel antenna 3 in the feedback signal group 3002 of 3100_3, there are Ω feedback signal groups for terminals. Here, Ω is an integer of 1 or more or an integer of 2 or more.

[0621] In Fig.31D the example, since "the number of time slots in which the reference signal for sector scanning can be transmitted (the number of terminals that can transmit the reference signal for sector scanning) when the terminal transmits the reference signal for sector scanning" is 4, so as Fig.31DAs shown, among the feedback signals of the transmission panel antenna 4 in the feedback signal group 3002 of 3100_4, there are four feedback signal groups sent to terminals, namely, the feedback signal group 3101_41 sent to the first terminal, the feedback signal group 3101_42 sent to the second terminal, the feedback signal group 3101_43 sent to the third terminal, and the feedback signal group 3101_44 sent to the fourth terminal. In addition, for example, when the "number of time slots in which a reference signal for sector scanning can be transmitted (the number of terminals that can transmit the reference signal for sector scanning) when a terminal transmits a reference signal for sector scanning" is Ω, the structure can also be as follows: among the feedback signals of the transmission panel antenna 4 in the feedback signal group 3002 of 3100_4, there are Ω feedback signal groups sent to terminals. Here, Ω is an integer of 1 or more or an integer of 2 or more.

[0622] Fig.32A , Fig.32B , Fig.32C and Fig.32D shows an example of the structure of the frame group 3003 including data symbols transmitted by the base station #1 of 901_1 in the time interval from t4 to t5 in Fig.30 . In addition, in Fig.32A , Fig.32B , Fig.32C and Fig.32D , the horizontal axis is time.

[0623] Moreover, Fig.32A is a diagram related to the frame of the transmission panel antenna 1 of 106_1 in the frame group 3003 including data symbols. Fig.32B is a diagram related to the frame of the transmission panel antenna 2 of 106_2 in the frame group 3003 including data symbols. Fig.32C is a diagram related to the frame of the transmission panel antenna 3 of 106_3 in the frame group 3003 including data symbols. Fig.32D is a diagram related to the frame of the transmission panel antenna 4 of 106_4 in the frame group 3003 including data symbols.

[0624] In Fig.32A 's example, since the "number of time slots in which a reference signal for sector scanning can be transmitted (the number of terminals that can transmit the reference signal for sector scanning) when a terminal transmits a reference signal for sector scanning" is 4, so as Fig.32AAs shown, in the frame of the transmission panel antenna 1 in the frame group 3003 including data symbols of 3200_1, there are four modulation signals (time slots) sent to terminals, namely, the modulation signal (time slot) 3201_11 sent to the first terminal, the modulation signal (time slot) 3201_12 sent to the second terminal, the modulation signal (time slot) 3201_13 sent to the third terminal, and the modulation signal (time slot) 3201_14 sent to the fourth terminal. In addition, for example, when the "number of time slots for transmitting the reference signal for sector scanning at the terminal (number of terminals capable of transmitting the reference signal for sector scanning)" is Ω, the structure can also be as follows: in the frame of the transmission panel antenna 1 in the frame group 3003 including data symbols of 3200_1, there are Ω groups of modulation signals (time slots) sent to terminals. Here, Ω is an integer of 1 or more or an integer of 2 or more.

[0625] In addition, it is called a "frame group including data symbols" because it is possible to have a frame including data symbols for the transmission panel antenna 1 of 106_1, a frame including data symbols for the transmission panel antenna 2 of 106_2, a frame including data symbols for the transmission panel antenna 3 of 106_3, and a frame including data symbols for the transmission panel antenna 4 of 106_4.

[0626] In Fig.32B 's example, since the "number of time slots for transmitting the reference signal for sector scanning at the terminal (number of terminals capable of transmitting the reference signal for sector scanning)" is 4, as Fig.32B shown, in the frame of the transmission panel antenna 2 in the frame group 3003 including data symbols of 3200_2, there are four modulation signals (time slots) sent to terminals, namely, the modulation signal (time slot) 3201_21 sent to the first terminal, the modulation signal (time slot) 3201_22 sent to the second terminal, the modulation signal (time slot) 3201_23 sent to the third terminal, and the modulation signal (time slot) 3201_24 sent to the fourth terminal. In addition, for example, when the "number of time slots for transmitting the reference signal for sector scanning at the terminal (number of terminals capable of transmitting the reference signal for sector scanning)" is Ω, the structure can also be as follows: in the frame of the transmission panel antenna 2 in the frame group 3003 including data symbols of 3200_2, there are Ω groups of modulation signals (time slots) sent to terminals. Here, Ω is an integer of 1 or more or an integer of 2 or more.

[0627] In Fig.32CIn the example, since "the number of time slots for transmitting the reference signal for sector scanning (the number of terminals capable of transmitting the reference signal for sector scanning) when the terminal transmits the reference signal for sector scanning" is 4, as Fig.32C shown, in the frame of the transmission panel antenna 3 in the frame group 3003 including data symbols of 3200_3, there are four modulation signals (time slots) to the terminals, namely, the modulation signal (time slot to the first terminal) 3201_31 to the first terminal, the modulation signal (time slot to the second terminal) 3201_32 to the second terminal, the modulation signal (time slot to the third terminal) 3201_33 to the third terminal, and the modulation signal (time slot to the fourth terminal) 3201_34 to the fourth terminal. In addition, for example, when "the number of time slots for transmitting the reference signal for sector scanning (the number of terminals capable of transmitting the reference signal for sector scanning) when the terminal transmits the reference signal for sector scanning" is Ω, the structure may also be as follows: in the frame of the transmission panel antenna 3 in the frame group 3003 including data symbols of 3200_3, there are Ω groups of modulation signals (time slots) to the terminals. Here, Ω is an integer of 1 or more or an integer of 2 or more.

[0628] In Fig.32D the example, since "the number of time slots for transmitting the reference signal for sector scanning (the number of terminals capable of transmitting the reference signal for sector scanning) when the terminal transmits the reference signal for sector scanning" is 4, as Fig.32D shown, in the frame of the transmission panel antenna 4 in the frame group 3003 including data symbols of 3200_4, there are four modulation signals (time slots) to the terminals, namely, the modulation signal (time slot to the first terminal) 3201_41 to the first terminal, the modulation signal (time slot to the second terminal) 3201_42 to the second terminal, the modulation signal (time slot to the third terminal) 3201_43 to the third terminal, and the modulation signal (time slot to the fourth terminal) 3201_44 to the fourth terminal. In addition, for example, when "the number of time slots for transmitting the reference signal for sector scanning (the number of terminals capable of transmitting the reference signal for sector scanning) when the terminal transmits the reference signal for sector scanning" is Ω, the structure may also be as follows: in the frame of the transmission panel antenna 4 in the frame group 3003 including data symbols of 3200_4, there are Ω groups of modulation signals (time slots) to the terminals. Here, Ω is an integer of 1 or more or an integer of 2 or more.

[0629] Fig.33 is a diagram showing an example related to the occupancy of terminals in the "sector scanning reference signal" transmission section of the terminal according to the present embodiment. In addition, Fig.33 is related to Fig.13Examples related to the occupancy of terminals in the time interval from t1 to t2 shown, such as the "sector scan reference signal transmission interval 1301_1 for the first terminal, the sector scan reference signal transmission interval 1301_2 for the second terminal, the sector scan reference signal transmission interval 1301_3 for the third terminal, and the sector scan reference signal transmission interval 1301_4 for the fourth terminal".

[0630] For example, as shown, terminal #1 of 902_1 transmits the sector scan reference signal 3301_1 in the sector scan reference signal transmission interval for the first terminal in 1301_1. Terminal #2 of 902_2 transmits the sector scan reference signal 3301_2 in the sector scan reference signal transmission interval for the first terminal in 1301_1. Terminal #3 of 902_3 transmits the sector scan reference signal 3301_3 in the sector scan reference signal transmission interval for the first terminal in 1301_1. Terminal #4 of 2902_4 transmits the sector scan reference signal 3301_4 in the sector scan reference signal transmission interval for the third terminal in 1301_3. Terminal #5 of 2902_5 transmits the sector scan reference signal 3301_5 in the sector scan reference signal transmission interval for the fourth terminal in 1301_4.

[0631] For example, as Fig.33 shown, terminal #1 of 902_1 transmits the sector scan reference signal 3301_1 in the sector scan reference signal transmission interval for the first terminal in 1301_1. Terminal #2 of 902_2 transmits the sector scan reference signal 3301_2 in the sector scan reference signal transmission interval for the first terminal in 1301_1. Terminal #3 of 902_3 transmits the sector scan reference signal 3301_3 in the sector scan reference signal transmission interval for the first terminal in 1301_1. Terminal #4 of 2902_4 transmits the sector scan reference signal 3301_4 in the sector scan reference signal transmission interval for the third terminal in 1301_3. Terminal #5 of 2902_5 transmits the sector scan reference signal 3301_5 in the sector scan reference signal transmission interval for the fourth terminal in 1301_4.

[0632] Terminal #6 of 2902_6 transmits the sector scan reference signal 3301_6.

[0633] In addition, the information transmitted by the sector scan reference signal 3301_1 transmitted by terminal #1 of 902_1 is the information as described in the descriptions in Embodiment 1, Embodiment 2, etc.

[0634] The information transmitted by the sector scan reference signal 3301_2 transmitted by terminal #2 of 902_2 is the information as described in the descriptions in Embodiment 1, Embodiment 2, etc.

[0635] The information transmitted by the sector scan reference signal 3301_3 transmitted by terminal #3 of 902_3 is the information as described in the descriptions in Embodiment 1, Embodiment 2, etc.

[0636] The information transmitted by the sector scan reference signal 3301_1 transmitted by terminal #4 of 2902_4 is the information as described in the descriptions in Embodiment 1, Embodiment 2, etc.

[0637] The information transmitted by the sector scan reference signal 3301_5 transmitted by terminal #5 of 2902_5 is the information as described in the descriptions in Embodiment 1, Embodiment 2, etc.

[0638] The information transmitted by the reference signal for sector scanning 3301_6 sent by the terminal #6 of 2902_6 is the information as described in the descriptions in Embodiment 1, Embodiment 2, etc.

[0639] For the time interval from t1 to t2 Fig.33 For the time interval from t2 to t3 in the case of the example shown, Figures 34A to 34D it is described using

[0640] In this way, as Fig.34A shown, the base station #1 of 901_1 transmits the "feedback signal 3401_1 sent to the terminal #1" as the "feedback signal of the transmission panel antenna 1 in the feedback signal group 3002 of 3100_1" and the "feedback signal 3101_11 sent to the first terminal".

[0641] In addition, as Fig.34A shown, the base station #1 of 901_1 transmits the "feedback signal 3401_4 sent to the terminal #4" as the "feedback signal of the transmission panel antenna 1 in the feedback signal group 3002 of 3100_1" and the "feedback signal 3101_13 sent to the third terminal".

[0642] Moreover, as Fig.34B shown, the base station #1 of 901_1 transmits the "feedback signal 3401_2 sent to the terminal #2" as the "feedback signal of the transmission panel antenna 2 in the feedback signal group 3002 of 3100_2" and the "feedback signal 3101_21 sent to the first terminal".

[0643] In addition, as Fig.34B shown, the base station #1 of 901_1 transmits the "feedback signal 3401_5 sent to the terminal #5" as the "feedback signal of the transmission panel antenna 2 in the feedback signal group 3002 of 3100_2" and the "feedback signal 3101_24 sent to the fourth terminal".

[0644] As Fig.34C shown, the base station #1 of 901_1 transmits the "feedback signal 3401_3 sent to the terminal #3" as the "feedback signal of the transmission panel antenna 3 in the feedback signal group 3002 of 3100_3" and the "feedback signal 3101_31 sent to the first terminal".

[0645] As Fig.34D shown, the base station #1 of 901_1 transmits the "feedback signal 3401_6 sent to the terminal #6" as the "feedback signal of the transmission panel antenna 4 in the feedback signal group 3002 of 3100_4" and the "feedback signal 3101_42 sent to the second terminal".

[0646] At this point, assuming Fig.34A The "feedback signal from 3401_1 to terminal #1" includes, for example, information that terminal #1 at 902_1 can communicate using the transmitting panel antenna 1 at 106_1 (with the base station #1 at 901_1).

[0647] In addition, assuming Fig.34A The "feedback signal from 3401_4 to terminal #4" includes, for example, information that terminal #4 at 2902_4 can communicate using the transmitting panel antenna 1 at 106_1 (with the base station #1 at 901_1).

[0648] Assumptions Fig.34B The "feedback signal from 3401_2 to terminal #2" includes, for example, information that terminal #2 at 902_2 can communicate using the transmitting panel antenna 2 at 106_2 (with the base station #1 at 901_1).

[0649] In addition, assuming Fig.34B The "feedback signal from 3401_5 to terminal #5" includes, for example, the information that terminal #5 of 2902_5 can communicate using the transmitting panel antenna 2 of 106_2 (with the base station #1 of 901_1).

[0650] Assumptions Fig.34C The "feedback signal from 3401_3 to terminal #3" includes, for example, the information that terminal #3 at 902_3 can communicate using the transmitting panel antenna 3 at 106_3 (with the base station #1 at 901_1).

[0651] Assumptions Fig.34D The "feedback signal from 3401_6 to terminal #6" includes, for example, the information that terminal #6 of 2902_6 can communicate using the transmitting panel antenna 4 of 106_4 (with the base station #1 of 901_1).

[0652] In addition, each feedback signal sent to the terminal may also include other information, such as the information described in the first embodiment and the second embodiment.

[0653] In addition, based on the data sent by terminal #1 at 902_1 Fig.33 The sector scan uses reference signal 3301_1, 901_1 base station #1 selects the transmitting panel antenna (such as Fig.34A In this way, the transmitting panel antenna 1 is selected, the beamforming parameters are set, and the feedback signal 3401_1 is sent to the terminal #1.

[0654] Based on the data sent by terminal #2 at 902_2 Fig.33For the sector scan reference signal 3301_2 of 901_1, base station #1 of 901_1 selects a transmission panel antenna (such as Fig.34B selecting transmission panel antenna 2 in that way), sets the beamforming parameters, and transmits the feedback signal 3401_2 sent to terminal #2.

[0655] Based on the Fig.33 sector scan reference signal 3301_3 sent by terminal #3 of 902_3, base station #1 of 901_1 selects a transmission panel antenna (such as Fig.34C selecting transmission panel antenna 3 in that way), sets the beamforming parameters, and transmits the feedback signal 3401_3 sent to terminal #3.

[0656] Based on the Fig.33 sector scan reference signal 3301_4 sent by terminal #4 of 2902_4, base station #1 of 901_1 selects a transmission panel antenna (such as Fig.34A selecting transmission panel antenna 1 in that way), sets the beamforming parameters, and transmits the feedback signal 3401_4 sent to terminal #4.

[0657] Based on the Fig.33 sector scan reference signal 3301_5 sent by terminal #5 of 2902_5, base station #1 of 901_1 selects a transmission panel antenna (such as Fig.34B selecting transmission panel antenna 2 in that way), sets the beamforming parameters, and transmits the feedback signal 3401_5 sent to terminal #5.

[0658] Based on the Fig.33 sector scan reference signal 3301_6 sent by terminal #6 of 2902_6, base station #1 of 901_1 selects a transmission panel antenna (such as Fig.34D selecting transmission panel antenna 4 in that way), sets the beamforming parameters, and transmits the feedback signal 3401_6 sent to terminal #6.

[0659] Next, for the time interval from t2 to t3, for the time interval from t4 to t5 in the case of the example shown in Figures 34A to 34D the following is described using Figures 35A to 35D .

[0660] For example, as Fig.35A shown, base station #1 of 901_1 transmits the "modulation signal (time slot) sent to terminal #1 of 3501_1" as the "modulation signal (time slot) sent to the first terminal of 3201_11" in the "frame of transmission panel antenna 1 in the frame group 3003 including data symbols of 3200_1". In addition,

[0661] The modulated signal (time slot) of 3501_1 sent to terminal #1 contains data sent to terminal #1 of 902_1. Additionally, the sending panel antenna 1 is used to send the modulated signal (time slot) of 3501_1 sent to terminal #1. Moreover, the setting method of the sending method of the modulated signal (time slot) of 3501_1 sent to terminal #1 is the method described in the descriptions in Embodiment 1, Embodiment 2, etc. For example, as described in the description in Embodiment 2, multiple modulated signals (time slots) can also be allocated to be sent to one terminal.

[0662] Additionally, as Fig.35A shown, the base station #1 of 901_1 sends the modulated signal (time slot) of 3501_4 sent to terminal #4 as the modulated signal (time slot) of 3201_13 sent to the 3rd terminal in the frame of the sending panel antenna 1 in the frame group 3003 containing data symbols of 3200_1. In addition,

[0663] the modulated signal (time slot) of 3501_4 sent to terminal #4 contains data sent to terminal #4 of 2902_4. Additionally, the sending panel antenna 1 is used to send the modulated signal (time slot) of 3501_4 sent to terminal #4. Moreover, the setting method of the sending method of the modulated signal (time slot) of 3501_4 sent to terminal #4 is the method described in the descriptions in Embodiment 1, Embodiment 2, etc. For example, as described in the description in Embodiment 2, multiple modulated signals (time slots) can also be allocated to be sent to one terminal.

[0664] As Fig.35B shown, the base station #1 of 901_1 sends the modulated signal (time slot) of 3501_2 sent to terminal #2 as the modulated signal (time slot) of 3201_21 sent to the 1st terminal in the frame of the sending panel antenna 2 in the frame group 3003 containing data symbols of 3200_2. In addition, the modulated signal (time slot) of 3501_2 sent to terminal #2 contains data sent to terminal #2 of 902_2. Additionally, the sending panel antenna 2 is used to send the modulated signal (time slot) of 3501_2 sent to terminal #2. Moreover, the setting method of the sending method of the modulated signal (time slot) of 3501_2 sent to terminal #2 is the method described in the descriptions in Embodiment 1, Embodiment 2, etc. For example, as described in the description in Embodiment 2, multiple modulated signals (time slots) can also be allocated to be sent to one terminal.

[0665] Additionally, as Fig.35BAs shown, base station #1 of 901_1 transmits the "modulation signal (time slot) of 3501_5 destined for terminal #5" as the "frame of transmitting panel antenna 2 in frame group 3003 of 3200_2 containing data symbols" and as the "modulation signal (time slot) of 3201_24 destined for the 4th terminal". In addition,

[0666] The "modulation signal (time slot) of 3501_5 destined for terminal #5" contains data for terminal #5 of 2902_5. Additionally, the "modulation signal (time slot) of 3501_5 destined for terminal #5" is transmitted using transmitting panel antenna 2. Moreover, the setting method for the transmission method of the "modulation signal (time slot) of 3501_5 destined for terminal #5" is the method described in the explanations in Embodiment 1, Embodiment 2, etc. For example, as described in the explanation in Embodiment 2, multiple modulation signals (time slots) can be allocated to one terminal.

[0667] As Fig.35C shown, base station #1 of 901_1 transmits the "modulation signal (time slot) of 3501_3 destined for terminal #3" as the "frame of transmitting panel antenna 3 in frame group 3003 of 3200_3 containing data symbols" and as the "modulation signal (time slot) of 3201_31 destined for the 1st terminal". In addition, the "modulation signal (time slot) of 3501_3 destined for terminal #3" contains data for terminal #3 of 902_3. Additionally, the "modulation signal (time slot) of 3501_3 destined for terminal #3" is transmitted using transmitting panel antenna 3. Moreover, the setting method for the transmission method of the "modulation signal (time slot) of 3501_3 destined for terminal #3" is the method described in the explanations in Embodiment 1, Embodiment 2, etc. For example, as described in the explanation in Embodiment 2, multiple modulation signals (time slots) can be allocated to one terminal.

[0668] As Fig.35D shown, base station #1 of 901_1 transmits the "modulation signal (time slot) of 3501_6 destined for terminal #6" as the "frame of transmitting panel antenna 4 in frame group 3003 of 3200_4 containing data symbols" and as the "modulation signal (time slot) of 3201_42 destined for the 2nd terminal". In addition, the "modulation signal (time slot) of 3501_6 destined for terminal #6" contains data for terminal #6 of 2902_6. Additionally, the "modulation signal (time slot) of 3501_6 destined for terminal #6" is transmitted using transmitting panel antenna 4. Moreover, the setting method for the transmission method of the "modulation signal (time slot) of 3501_6 destined for terminal #6" is the method described in the explanations in Embodiment 1, Embodiment 2, etc. For example, as described in the explanation in Embodiment 2, multiple modulation signals (time slots) can be allocated to one terminal.

[0669] In addition, in Fig.35A In the "modulation signal (time slot) of 3501_1 sent to terminal #1", in addition to data symbols, it can also include "reference signals such as DMRS, PTRS, SRS", pilot symbols, pilot signals, preambles, symbols containing control information, etc. In addition, as symbols containing control information, information about the terminal that is the destination of transmission (ID capable of identifying the terminal), the transmission method of the modulation signal, information about the modulation method, information about the error correction coding method (code length, coding rate, etc.), information about MCS, etc. can be considered.

[0670] In addition, in Fig.35A the "modulation signal (time slot) of 3501_4 sent to terminal #4", in addition to data symbols, it can also include "reference signals such as DMRS, PTRS, SRS", pilot symbols, pilot signals, preambles, symbols containing control information, etc. In addition, as symbols containing control information, information about the terminal that is the destination of transmission (ID capable of identifying the terminal), the transmission method of the modulation signal, information about the modulation method, information about the error correction coding method (code length, coding rate, etc.), information about MCS, etc. can be considered.

[0671] In Fig.35B the "modulation signal (time slot) of 3501_2 sent to terminal #2", in addition to data symbols, it can also include "reference signals such as DMRS, PTRS, SRS", pilot symbols, pilot signals, preambles, symbols containing control information, etc. In addition, as symbols containing control information, information about the terminal that is the destination of transmission (ID capable of identifying the terminal), the transmission method of the modulation signal, information about the modulation method, information about the error correction coding method (code length, coding rate, etc.), information about MCS, etc. can be considered.

[0672] In addition, in Fig.35B the "modulation signal (time slot) of 3501_5 sent to terminal #5", in addition to data symbols, it can also include "reference signals such as DMRS, PTRS, SRS", pilot symbols, pilot signals, preambles, symbols containing control information, etc. In addition, as symbols containing control information, information about the terminal that is the destination of transmission (ID capable of identifying the terminal), the transmission method of the modulation signal, information about the modulation method, information about the error correction coding method (code length, coding rate, etc.), information about MCS, etc. can be considered.

[0673] In Fig.35CIn the "modulation signal (time slot) of 3501_3 sent to terminal #3", in addition to data symbols, it may also include "reference signals such as DMRS, PTRS, SRS", pilot symbols, pilot signals, preambles, symbols containing control information, etc. In addition, as symbols containing control information, information on the terminal that is the destination of transmission (ID capable of identifying the terminal), the transmission method of the modulation signal, information on the modulation method, information on the error correction coding method (code length, coding rate, etc.), information on MCS, etc. can be considered.

[0674] In Fig.35D In the "modulation signal (time slot) of 3501_6 sent to terminal #6", in addition to data symbols, it may also include "reference signals such as DMRS, PTRS, SRS", pilot symbols, pilot signals, preambles, symbols containing control information, etc. In addition, as symbols containing control information, information on the terminal that is the destination of transmission (ID capable of identifying the terminal), the transmission method of the modulation signal, information on the modulation method, information on the error correction coding method (code length, coding rate, etc.), information on MCS, etc. can be considered.

[0675] As described above, the base station #1 of 901_1 assigns symbols for the terminal that is the destination of transmission to the modulation signals transmitted by the transmitting panel antennas, and distributes the modulation signals to each transmitting panel antenna. Therefore, the effect of improving the data transmission efficiency in the system can be obtained. In addition, the terminal can obtain the following effect by transmitting the reference signal for sector scanning in a manner that reduces the number of collisions, that is, the communication capacity in the system composed of the base station and the terminal can be improved.

[0676] Next, describe Fig.29 the communication situation in an example of the communication state shown. Fig.29 The communication situation in an example of the communication state shown can be the same as the communication situation in Fig.26 , Fig. 27 Among. Hereinafter, refer to Fig.26 , Fig. 27 to describe an example of the communication situation.

[0677] Fig.26 Shows Fig.29 An example of the situation when the base station #1 of 901_1 communicates with "terminal #1 of 902_1, terminal #2 of 902_2, terminal #3 of 902_3, terminal #4 of 2902_4, terminal #5 of 2902_5, terminal #6 of 2902_6". Fig.26 (A) of Figure 26(B) shows an example of the transmission status of the modulation signals of "Terminal #1 of 902_1, Terminal #2 of 902_2, Terminal #3 of 902_3, Terminal #4 of 2902_4, Terminal #5 of 2902_5, Terminal #6 of 2902_6". In addition, in Figure 26 (A), Figure 26 (B), the horizontal axis is time. In addition, in Figure 26 , for the part that performs the same operation as Figure 18 , the same reference numerals are attached.

[0678] First, Base Station #1 of 901_1 transmits the sector scan reference signal 1801_1. In addition, this has been described using Figure 30 , so the description is omitted.

[0679] Next, terminals such as "Terminal #1 of 902_1, Terminal #2 of 902_2, Terminal #3 of 902_3, Terminal #4 of 2902_4, Terminal #5 of 2902_5, Terminal #6 of 2902_6" transmit the sector scan reference signal 1851_1. In addition, this has been described using Figure 13 , Figure 14 , etc., so the description is omitted.

[0680] Base Station #1 of 901_1 transmits the feedback signal group 2602_1. In addition, this has been described using Figure 31A , Figure 31B , Figure 31C , Figure 31D , so the description is omitted.

[0681] Then, Base Station #1 of 901_1 transmits "Frame Group 2603_1 Containing Data Symbols". In addition, this has been described using Figure 32A , Figure 32B , Figure 32C , Figure 32D , so the description is omitted. (Therefore, "Frame 2603_1 Containing Data Symbols" is regarded as a frame for downlink, for example.)

[0682] Next, terminals such as "Terminal #1 of 902_1, Terminal #2 of 902_2, Terminal #3 of 902_3, Terminal #4 of 2902_4, Terminal #5 of 2902_5, Terminal #6 of 2902_6" transmit "Frame Group 2652_1 Containing Data Symbols". In addition, the structure of this frame will be described later using Figure 36 . (Therefore, "Frame Group 2652_1 Containing Data Symbols" is regarded as a frame for uplink, for example.)

[0683] Next, Base Station #1 of 901_1 transmits "Frame Group 2603_2 containing data symbols". In addition, "Frame Group 2603_2 containing data symbols" is constructed in the manner described in the explanation using Figure 32A , Figure 32B , Figure 32C , Figure 32D .

[0684] Next, terminals such as "Terminal #1 of 902_1, Terminal #2 of 902_2, Terminal #3 of 902_3, Terminal #4 of 2902_4, Terminal #5 of 2902_5, Terminal #6 of 2902_6" transmit "Frame Group 2652_2 containing data symbols". In addition, the structure of this frame will be described later using Figure 36 .

[0685] Figure 27 shows Figure 26 and subsequent examples of the transmission status of the modulation signals of Base Station #1 of 901_1 and the transmission status of the modulation signals of terminals such as "Terminal #1 of 902_1, Terminal #2 of 902_2, Terminal #3 of 902_3, Terminal #4 of 2902_4, Terminal #5 of 2902_5, Terminal #6 of 2902_6". In addition, in Figure 27 , the same reference numerals are attached to the parts that perform the same operations as Figure 18 .

[0686] Figure 27 (A) of Figure 26 shows an example of the transmission status of the modulation signal of Base Station #1 of 901_1, which is temporally consecutive to the transmission status of the modulation signal of Base Station #1 of 901_1 in (A) of Figure 26 .

[0687] Figure 27 (B) of Figure 26 shows an example of the transmission status of the modulation signals of "Terminal #1 of 902_1, Terminal #2 of 902_2, Terminal #3 of 902_3, Terminal #4 of 2902_4, Terminal #5 of 2902_5, Terminal #6 of 2902_6", which is temporally consecutive to the transmission status of the modulation signals of "Terminal #1 of 902_1, Terminal #2 of 902_2, Terminal #3 of 902_3, Terminal #4 of 2902_4, Terminal #5 of 2902_5, Terminal #6 of 2902_6" in (B) of Figure 26 .

[0688] In addition, in Figure 27 (A) of Figure 27 (B) of Figure 27 , the horizontal axis is time.

[0689] In Figure 26 (A) of Figure 26After (B) of, the base station #1 of 901_1 sends "Frame Group 2603_3 containing data symbols". In addition, the method of constructing "Frame Group 2603_2 containing data symbols" is the method described as using Figure 32A , Figure 32B , Figure 32C , Figure 32D as described.

[0690] Next, terminals such as "Terminal #1 of 902_1, Terminal #2 of 902_2, Terminal #3 of 902_3, Terminal #4 of 2902_4, Terminal #5 of 2902_5, Terminal #6 of 2902_6" send "Frame Group 2652_3 containing data symbols". In addition, the structure of this frame will be described later using Figure 36 for explanation.

[0691] Next, the base station #1 of 901_1 sends the sector scan reference signal 1801_2. In addition, this has been described using Figure 30 for explanation, so the explanation is omitted.

[0692] Next, terminals such as "Terminal #1 of 902_1, Terminal #2 of 902_2, Terminal #3 of 902_3, Terminal #4 of 2902_4, Terminal #5 of 2902_5, Terminal #6 of 2902_6" send the sector scan reference signal 1851_2. In addition, this has been described using Figure 13 , Figure 14 etc. for explanation, so the explanation is omitted.

[0693] The base station #1 of 901_1 sends the feedback signal group 2602_2. In addition, this has been described using Figure 31A , Figure 31B , Figure 31C , Figure 31D for explanation, so the explanation is omitted.

[0694] Then, the base station #1 of 901_1 sends "Frame Group 2603_4 containing data symbols". In addition, this has been described using Figure 32A , Figure 32B , Figure 32C , Figure 32D for explanation, so the explanation is omitted.

[0695] Next, terminals such as "Terminal #1 of 902_1, Terminal #2 of 902_2, Terminal #3 of 902_3, Terminal #4 of 2902_4, Terminal #5 of 2902_5, Terminal #6 of 2902_6" send "Frame Group 2652_4 containing data symbols". In addition, the structure of this frame will be described later using Figure 36 for explanation.

[0696] In this way, the base station #1 of 901_1 and the terminal can send the sector scan reference signal before "the base station #1 of 901_1 sends the 'frame group containing data symbols', and / or the terminals such as 'the terminal #1 of 902_1, the terminal #2 of 902_2, the terminal #3 of 902_3, the terminal #4 of 2902_4, the terminal #5 of 2902_5, the terminal #6 of 2902_6' send the 'frame group containing data symbols'". In addition, the base station #1 of 901_1 and the terminal can send the sector scan reference signal again after "the base station #1 of 901_1 sends the 'frame group containing data symbols', and / or the terminals such as 'the terminal #1 of 902_1, the terminal #2 of 902_2, the terminal #3 of 902_3, the terminal #4 of 2902_4, the terminal #5 of 2902_5, the terminal #6 of 2902_6' send the 'frame group containing data symbols'". By selecting the transmission panel antenna to be used and setting the transmission beamforming, the following effect can be obtained, that is, the base station and the terminal can obtain high data reception quality.

[0697] Next, use Figure 36 to illustrate the structural example of the "frame group 2652_i containing data symbols" sent by terminals such as "the terminal #1 of 902_1, the terminal #2 of 902_2, the terminal #3 of 902_3, the terminal #4 of 2902_4, the terminal #5 of 2902_5, the terminal #6 of 2902_6". In addition, for example, let i be an integer greater than or equal to 1. In Figure 36 the horizontal axis is time.

[0698] As Figure 36 shown, the "frame group 2652_i containing data symbols" is composed of a first time interval, a second time interval, a third time interval, and a fourth time interval.

[0699] Moreover, for example, the terminal #1 of 902_1 uses the first time interval to send the frame group 3601_1 (containing data symbols). The terminal #2 of 902_2 uses the third time interval to send the frame group 3601_2 (containing data symbols). The terminal #3 of 902_3 uses the first time interval to send the frame group 3601_3 (containing data symbols). The terminal #4 of 2902_4 uses the third time interval to send the frame group 3601_4 (containing data symbols). The terminal #5 of 2902_5 uses the fourth time interval to send the frame group 3601_5 (containing data symbols). The terminal #6 of 2902_6 uses the second time interval to send the frame group 3601_6 (containing data symbols).

[0700] In addition, in Figure 36Among them, for example, although there are the frame group 3601_1 sent by terminal #1 and the frame 3601_3 sent by terminal #3 in the first time interval, if the panel antenna of the base station of 901_1 used for communicating with terminal #1 is different from the panel antenna of the base station of 901_1 used for communicating with terminal #3, the frame group 3601_1 and the frame 3601_3 can reduce interference with each other. Additionally, although there are the frame group 3601_2 sent by terminal #2 and the frame 3601_4 sent by terminal #4 in the third time interval, if the panel antenna of the base station of 901_1 used for communicating with terminal #2 is different from the panel antenna of the base station of 901_1 used for communicating with terminal #4, the frame group 3601_2 and the frame 3601_4 can reduce interference with each other.

[0701] In addition, in Figure 36 each terminal can use multiple time intervals to send modulation signals (time slots), and each terminal can also send multiple modulation signals (time slots) in a certain time interval. This has been described in Embodiment 1, Embodiment 2, etc.

[0702] In this way, for example, by time-division multiplexing the "frame group 2652_i containing data symbols" sent by terminals such as "terminal #1 of 902_1, terminal #2 of 902_2", having each terminal send a frame group, and having base station #1 of 901_1 receive the frame groups sent by each terminal, interference can be suppressed, and thus high data reception quality can be obtained. Additionally, for base station #1 of 901_1, according to the usage method of the panel antenna, a situation can be formed where even if multiple terminals send modulation signals (time slots) at the same time, the interference between them is small.

[0703] In addition, in Figure 36 among the frame groups 3601_1, frame group 3601_2, frame group 3601_3, frame group 3601_4, frame group 3601_5, and frame group 3601_6, in addition to data symbols, for example, it can also include "reference signals such as DMRS, PTRS, SRS", pilot symbols, pilot signals, preambles, symbols containing control information, etc.

[0704] In Figure 36 it is described the case of time-division multiplexing the frame groups sent by terminals and using MU-MIMO for spatial division, but frequency division can also be performed on the frame groups sent by terminals.

[0705] Figure 37A is Figure 35A a variant of Figure 37A In Figure 35A the parts performing the same operations as Figure 37B is Figure 35B a variant ofFigure 37B Among them, the parts performing the same operations are attached with the same reference numerals. Figure 35B is a variant of Figure 37C In Figure 35C the parts performing the same operations are attached with the same reference numerals. Figure 37C Among them, the parts performing the same operations are attached with the same reference numerals. Figure 35C is a variant of Figure 37D In Figure 35D the parts performing the same operations are attached with the same reference numerals. Figure 37D Among them, the parts performing the same operations are attached with the same reference numerals. Figure 37D is a variant of

[0706] Figure 37A The difference between Figure 35A and Figure 35A is that in Figure 37A the modulated signal (time slot) 3501_1 sent to terminal #1 consists of 1 time slot, while in Figure 35A the modulated signal (time slot) 3501_1 sent to terminal #1 consists of 2 time slots. In Figure 37A there are unallocated empty time slots, while in Figure 37B the empty time slots are effectively utilized, thus improving the data transmission efficiency. In addition, in terms of effectively utilizing the empty time slots, Figure 37C and Figure 37D are the same. Therefore, the usage method of time slots is not limited to Figure 35A and Figure 35B and Figure 35C and Figure 35D and Figure 37A and Figure 37B and Figure 37C and Figure 37D .

[0707] In addition, if we focus on the second time slot of each of Figure 37A and Figure 37B and Figure 37C and Figure 37D there is a modulated signal (time slot) 3501_1 sent to terminal #1 in Figure 37A , there is a modulated signal (time slot) 3501_2 sent to terminal #2 in Figure 37B , there is a modulated signal (time slot) 3501_3 sent to terminal #3 in Figure 37C , and there is a modulated signal (time slot) 3501_6 sent to terminal #6 in Figure 37D . For example, in this way, in Figure 37A and Figure 37B and Figure 37C and Figure 37DIn a certain time period, which is the second time slot of each figure, there may also be modulation signals (time slots) whose destinations vary according to the panel antennas. In this case, the four panel antennas may or may not use the same frequency (the same frequency band).

[0708] In addition, when the same frequency (the same frequency band) is used, it can be considered as transmission using MU-MIMO. For example, when the directivity varies according to the panel antennas, the following effect can be obtained, that is, even when using MU-MIMO, interference can be reduced between each other. (In addition, the related transmission method has also been described in Embodiment 2.)

[0709] Alternatively, when the base station #1 of 901_1 transmits modulation signals according to the panel antennas, for example, the modulation signals transmitted using panel antenna 1 and the modulation signals transmitted using panel antenna 2 exist in the same time period, and the frequency (frequency band) of the modulation signals transmitted using panel antenna 1 is the same as or partially the same as the frequency (frequency band) of the modulation signals transmitted using panel antenna 2.

[0710] For example, when transmitting modulation signals from each panel antenna, the following 3-1 example, 3-2 example, and 3-3 example can be considered.

[0711] 3-1 example:

[0712] The base station #1 of 901_1 is equipped with multiple panel antennas. When transmitting modulation signals from each panel antenna, in a certain time period, there may also be a set of modulation signals with the same or partially the same frequency (frequency band).

[0713] As another method, the frequency (frequency band) of the modulation signals transmitted using panel antenna 1 by the base station #1 of 901_1 may also be different from the frequency (frequency band) of the modulation signals transmitted using panel antenna 2.

[0714] 3-2 example:

[0715] The base station #1 of 901_1 is equipped with multiple panel antennas. When transmitting modulation signals from each panel antenna, there may also be a set of modulation signals with different frequencies (frequency bands).

[0716] Moreover, it may be that the frequency (frequency band) of the modulation signals transmitted using panel antenna 1 by the base station #1 of 901_1 is the same as the frequency (frequency band) of the modulation signals transmitted using panel antenna 2, and these two modulation signals are time-division multiplexed.

[0717] 3-3 example:

[0718] The base station #1 of 901_1 is equipped with multiple panel antennas. When transmitting modulated signals from each panel antenna, there can also be a set of modulated signals with the same frequency (frequency band) and subject to time division multiplexing.

[0719] In addition, for example, when the base station #1 of 901_1 is Figure 1A , Figure 1B , Figure 1C structured, modulated signals can also be generated in the manner of "there exists Example 3-1", and / or "there exists Example 3-2", and / or "there exists Example 3-3" according to the control signal 100, and the modulated signals are transmitted from the panel antennas. However, although the control signal 100 is set as the output from the third processing unit, it is not limited to this structure. For example, the control signal 100 can be other internal outputs, and can also be signals from the outside.

[0720] As described in this embodiment, the terminal can obtain the following effect by transmitting the reference signal for sector scanning in a manner that reduces the number of occurrences of conflicts, that is, the communication capacity in the system composed of the base station and the terminal can be improved. In addition, the structures of the terminal and the base station are not limited to Figure 1A , Figure 1B , Figure 1C structured. In addition, the structures of the transmitting panel antenna and the receiving panel antenna are not limited to Figure 3 , Figure 4 structured. For example, as long as it is a structure capable of generating one or more transmitting directivities and receiving directivities of antennas. In addition, there are signals, frames, etc. in each figure, but the names are not limited to this. What is important is the function of the signal itself being transmitted.

[0721] (Embodiment 4)

[0722] In this embodiment, structural examples of modulated signals, frames, frame groups, etc. applicable in the embodiments of Embodiment 1, Embodiment 2, Embodiment 3, and the subsequent Embodiment 5 are described. In addition, hereinafter, the figures shown in Embodiment 1, Embodiment 2, and Embodiment 3 may be cited for description. In this case, the description of a part of the figures shown in Embodiment 1, Embodiment 2, and Embodiment 3 may sometimes be omitted.

[0723] For example, in this embodiment, the structural examples of modulated signals, frames, frame groups, etc. are described in the case where "the base station and the terminal communicate as Figure 18 and Figure 19 ", or "the base station and the terminal communicate as Figure 26 and Figure 27 ".

[0724] For example, in Embodiment 1, it was described that in the case where "the base station and the terminal are as Figure 18 andFigure 19 When communicating as such, the base station and the terminal use the sector scan reference signal 1801_1, the sector scan reference signal 1851_1, and the feedback signal 1802_1 to select the panel antenna, and use the sector scan reference signal 1801_2, the sector scan reference signal 1851_2, and the feedback signal 1802_2 to select the next panel antenna.

[0725] In addition, in Embodiment 2 and Embodiment 3, it was described that when the base station and the terminal communicate as Figure 26 and Figure 27 such, the base station and the terminal use the sector scan reference signal 1801_1, the sector scan reference signal 1851_1, and the feedback signal group 2602_1 to select the panel antenna, and use the sector scan reference signal 1801_2, the sector scan reference signal 1851_2, and the feedback signal group 2602_2 to select the next panel antenna.

[0726] Hereinafter, a case of changing the parameter setting of beamforming for " Figure 18 , Figure 19 frames 1803_1, 1803_2, 1803_3, 1803_4, etc. including data symbols, and frames 1852_1, 1852_2, 1852_3, 1852_4, etc. including data symbols" in "", and " Figure 26 frame groups 2603_1, 2603_2, 2603_3, 2603_4, etc. including data symbols, and frame groups 2652_1, 2652_2, 2652_3, 2652_4, etc. including data symbols" in "". In addition, for these frames and frame groups, the panel antenna is not changed.

[0727] Figure 38 Shows Figure 17 , Figure 25 , Figure 32A , Figure 32B , Figure 32C , Figure 32D , Figure 35A , Figure 35B , Figure 35C , Figure 35D , Figure 37A , Figure 37B , Figure 37C , Figure 37D an example of the structure of the "modulation signal (time slot) sent to the i-th terminal" 3800 transmitted by the base station in. Here, i is an integer of 1 or more.

[0728] As Figure 38As shown, the "modulation signal (time slot) sent to the i-th terminal" 3800 is composed of, for example, a first reference symbol (first reference signal) 3801, a control information symbol 3802, a data symbol 3803, and a second reference symbol (second reference signal) 3804.

[0729] The first reference symbol 3801 is a symbol for demodulating the data symbol 3803, and is, for example, a symbol for performing channel estimation, frequency offset estimation, phase distortion (phase noise) estimation, signal detection, etc. In addition, the first reference symbol 3801 can also be, for example, a DMRS.

[0730] It is assumed that the control information symbol 3802 contains at least information related to the data symbol 3803. It is assumed that, for example, in the control information symbol 3802, information on the transmission method used to transmit the data symbol 3803, information on the modulation method, information on the error correction coding method, etc. are included.

[0731] At this time, the control information symbol 3802 can also contain information on the beamforming parameters used by the base station (which can also be parameters to be used later). In addition, the control information symbol 3802 can also contain information indicating whether the base station has changed the beamforming parameters.

[0732] The data symbol 3803 is a symbol for transmitting data.

[0733] The second reference symbol 3804 is a symbol for the terminal to estimate the state of the modulation signal sent by the base station. The terminal uses this symbol to estimate the appropriate parameters of the base station's beamforming and the appropriate parameters of the terminal's beamforming. In addition, the information estimated here can also be fed back to the base station. (For example, the information estimated here can also be included in the control information symbol 3902 described later Figure 39A 、 Figure 39B .) In addition, in order to search for an appropriate directivity, the second reference symbol 3804 can also change the directivity in units of symbols or multiple symbols.

[0734] Figure 39A Shows Figure 20 、 Figure 28 、 Figure 36 An example of the structure of the "frame or frame group" 3900 transmitted by the terminal in

[0735] As Figure 39A shown, the "frame or frame group" 3900 is composed of, for example, a third reference symbol (third reference signal) 3901, a control information symbol 3902, a data symbol 3903, and a fourth reference symbol (second reference signal) 3904.

[0736] The third reference symbol 3901 is a symbol for demodulating the data symbol 3903, for example, a symbol for performing channel estimation, frequency offset estimation, phase distortion (phase noise) estimation, signal detection, etc. In addition, the third reference symbol 3901 can also be DMRS, for example.

[0737] It is assumed that the control information symbol 3902 contains at least information related to the data symbol 3903. It is assumed that in the control information symbol 3802, for example, information on the transmission method used to transmit the data symbol 3903, information on the modulation method, and information on the error correction coding method are included.

[0738] At this time, the control information symbol 3902 can also contain information on the beamforming parameters used by the terminal (which can also be parameters used later). In addition, the control information symbol 3902 can also contain information indicating whether the terminal has changed the beamforming parameters.

[0739] The data symbol 3903 is a symbol for transmitting data.

[0740] The fourth reference symbol 3904 is a symbol for the base station to estimate the state of the modulation signal transmitted by the terminal. The base station uses this symbol to estimate the appropriate parameters of the terminal's beamforming and the appropriate parameters of the base station's beamforming. In addition, the information estimated here can also be fed back to the terminal. (For example, the information estimated here can also be included in Figure 38 the control information symbol 3802.) In addition, in order to search for an appropriate directivity, the fourth reference symbol 3904 can also change the directivity in units of symbols or multiple symbols.

[0741] Figure 39B Shows Figure 20 , Figure 28 , Figure 36 a different structural example of the "frame or frame group" 3900 transmitted by the terminal in Figure 39A .

[0742] Figure 39B The difference from Figure 39A is that there is no fourth reference symbol 3904. In this case, the base station and the terminal do not perform the actions described above using the fourth reference symbol 3904.

[0743] As described above, by changing the parameters for directivity control one or more times after selecting antennas in the base station and the terminal, that is, by making the frequency of updating the parameters for directivity control higher than the frequency of antenna selection, the reception quality of data can be improved, and thus the effect of improving the data transmission efficiency in the system can be obtained.

[0744] In addition, Figure 38 , Figure 39A ,Figure 39B The structure is only an example, and the construction method is not limited thereto. For example, in Figure 38 , Figure 39A , Figure 39B , other code elements may be included. Additionally, other code elements may also be included in each code element. Furthermore, the arrangement order of the code elements is not limited to the examples of Figure 38 , Figure 39A , Figure 39B .

[0745] In addition, in the case where "the base station and the terminal communicate as in Figure 18 and Figure 19 ", or "the base station and the terminal communicate as in Figure 26 and Figure 27 ", the frequency of the modulation signal transmitted by the base station and the frequency transmitted by the terminal may be the same, may be partially the same, or may also be different. However, it is not limited to the examples described. Moreover, the timing of the base station transmitting the modulation signal and the timing of the terminal transmitting the modulation signal are not limited to "the examples of Figure 18 and Figure 19 (Time Division Multiplexing (TDM), Time Division Duplex (TDD))", " Figure 26 and Figure 27 's examples (TDM, TDD)". For example, it may also be a method other than "TDM, TDD".

[0746] (Embodiment 5)

[0747] In this embodiment, a modified example of Embodiment 3 will be described. In addition, hereinafter, the figures shown in any one of Embodiments 1, 2, 3, and 4 may sometimes be referred to for description. In this case, the description of a part of the figure shown in any one of Embodiments 1, 2, 3, and 4 may sometimes be omitted.

[0748] Figure 40 An example of the communication state in this embodiment is shown. In Figure 40 , the same reference numerals are attached to the parts that perform the same operations as Figure 9 , Figure 29 .

[0749] In Figure 40Among them, base station #1 of 901_1 communicates with "terminal #1 of 902_1, terminal #2 of 902_2, terminal #3 of 902_3, terminal #4 of 2902_4, terminal #5 of 2902_5, terminal #6 of 2902_6". As described in the explanation of Embodiment 3, the communication process, communication method, etc. have been explained in Embodiment 3, so the explanation is omitted.

[0750] In Figure 40 Among them, there is also base station #2 of 4001_2, and base station #2 of 4001_2 communicates with "terminal #1 of 902_1, terminal #2 of 902_2, terminal #3 of 902_3". Hereinafter, the operations in this regard will be described in detail.

[0751] In addition, the structure of base station #2 of 4001_2 can be the same as that of base station #1 of 901_1. For example, base station #2 of 4001_2 may include four transmit panel antennas: transmit panel antenna 1 of 106_1, transmit panel antenna 2 of 106_2, transmit panel antenna 3 of 106_3, and transmit panel antenna 4 of 106_4. In addition, base station #2 of 4001_2 may also be structured with "one or more" "transmit antennas or transmit panel antennas".

[0752] Figure 30 Shows Figure 40 An example of the modulated signal 3000 transmitted by base station #2 of 4001_2 in Figure 10 The same operations are attached with the same reference numerals and the description is omitted.

[0753] In the time interval from time t0 to time t1, there is a sector scan reference signal 1001.

[0754] The time interval from time t1 to time t2 is the response interval of the terminal.

[0755] In the time interval from time t2 to time t3, there is a feedback signal group 3002. In addition, the feedback signal group 3002 will be described later.

[0756] In the time interval from time t4 to time t5, there is a frame group 3003 including data symbols. In addition, the frame group 3003 including data symbols will be described later.

[0757] Figure 11 Shows Figure 40 The Figure 30 Sector scan reference signal 1001 transmitted by base station #2 of 4001_2 in Figure 11 Since the operations in

[0758] Figure 12 shows Figure 11 a structural example of the "reference signal 1101_i for sector scanning in transmission panel antenna i". In addition, since the operation of Figure 12 has been described, the description is omitted.

[0759] Figure 13 shows an operation example of the terminal response interval, that is, the time interval from time t1 to time t2. In addition, since the operation of Figure 13 has been described, the description is omitted.

[0760] Figure 14 shows an example related to the occupancy of the terminals of Figure 13 the "transmission interval 1301_1 of the reference signal for sector scanning for the first terminal, transmission interval 1301_2 of the reference signal for sector scanning for the second terminal, transmission interval 1301_3 of the reference signal for sector scanning for the third terminal, transmission interval 1301_4 of the reference signal for sector scanning for the fourth terminal" shown. In addition, in Embodiment 1, Embodiment 2, etc., the operation of Figure 14 has been described, the description is omitted.

[0761] Figure 15 shows Figure 11 a structural example of the "reference signal 1101_xi for sector scanning in transmission panel antenna xi". In addition, since the operation of Figure 15 has been described, the description is omitted.

[0762] Figure 31A , Figure 31B , Figure 31C and Figure 31D show an example of the structure of the feedback signal group 3002 transmitted by base station #2 of 4001_2 in the time interval from t2 to t3 of Figure 30 . In addition, in Figure 31A , Figure 31B , Figure 31C and Figure 31D , the horizontal axis is time. In addition, for simplicity of description, it is assumed that base station #2 of 4001_2 has four transmission panel antennas: transmission panel antenna 1 of 106_1, transmission panel antenna 2 of 106_2, transmission panel antenna 3 of 106_3, and transmission panel antenna 4 of 106_4.

[0763] Moreover, Figure 31A is a diagram related to the feedback signal of transmission panel antenna 1 of 106_1 in the feedback signal group 3002. Figure 31B is a diagram related to the feedback signal of transmission panel antenna 2 of 106_2 in the feedback signal group 3002. Figure 31CThis is a diagram related to the feedback signal of transmission panel antenna 3 of 106_3 in feedback signal group 3002. Figure 31D This is a diagram related to the feedback signal of transmission panel antenna 4 of 106_4 in feedback signal group 3002.

[0764] In Figure 31A In the example of, since "the number of time slots for transmitting the reference signal for sector scanning by the terminal (the number of terminals capable of transmitting the reference signal for sector scanning)" is 4, as Figure 31A shown, in the feedback signal of transmission panel antenna 1 in feedback signal group 3002 of 3100_1, there are four feedback signal groups for terminals, namely, feedback signal group 3101_11 for the first terminal, feedback signal group 3101_12 for the second terminal, feedback signal group 3101_13 for the third terminal, and feedback signal group 3101_14 for the fourth terminal. In addition, for example, when "the number of time slots for transmitting the reference signal for sector scanning by the terminal (the number of terminals capable of transmitting the reference signal for sector scanning)" is Ω, the structure can also be such that in the feedback signal of transmission panel antenna 1 in feedback signal group 3002 of 3100_1, there are Ω feedback signal groups for terminals. Here, Ω is an integer of 1 or more or an integer of 2 or more.

[0765] In addition, it is described as "feedback signal group" because it is possible to have the feedback signal for transmission panel antenna 1 of 106_1, the feedback signal for transmission panel antenna 2 of 106_2, the feedback signal for transmission panel antenna 3 of 106_3, and the feedback signal for transmission panel antenna 4 of 106_4.

[0766] In Figure 31B In the example of, since "the number of time slots for transmitting the reference signal for sector scanning by the terminal (the number of terminals capable of transmitting the reference signal for sector scanning)" is 4, as Figure 31BAs shown, among the feedback signals of the transmit panel antenna 2 in the feedback signal group 3002 of 3100_2, there are four feedback signal groups for terminals, namely, the feedback signal group 3101_21 sent to the first terminal, the feedback signal group 3101_22 sent to the second terminal, the feedback signal group 3101_23 sent to the third terminal, and the feedback signal group 3101_24 sent to the fourth terminal. In addition, for example, when "the number of time slots for transmitting the reference signal for sector scanning at the terminal (the number of terminals that can transmit the reference signal for sector scanning)" is Ω, it can also be the following structure, that is, among the feedback signals of the transmit panel antenna 2 in the feedback signal group 3002 of 3100_2, there are Ω feedback signal groups for terminals. Here, Ω is an integer of 1 or more or an integer of 2 or more.

[0767] In Figure 31C 's example, since "the number of time slots for transmitting the reference signal for sector scanning at the terminal (the number of terminals that can transmit the reference signal for sector scanning)" is 4, so as Figure 31C shown, among the feedback signals of the transmit panel antenna 3 in the feedback signal group 3002 of 3100_3, there are four feedback signal groups for terminals, namely, the feedback signal group 3101_31 sent to the first terminal, the feedback signal group 3101_32 sent to the second terminal, the feedback signal group 3101_33 sent to the third terminal, and the feedback signal group 3101_34 sent to the fourth terminal. In addition, for example, when "the number of time slots for transmitting the reference signal for sector scanning at the terminal (the number of terminals that can transmit the reference signal for sector scanning)" is Ω, it can also be the following structure, that is, among the feedback signals of the transmit panel antenna 3 in the feedback signal group 3002 of 3100_3, there are Ω feedback signal groups for terminals. Here, Ω is an integer of 1 or more or an integer of 2 or more.

[0768] In Figure 31D 's example, since "the number of time slots for transmitting the reference signal for sector scanning at the terminal (the number of terminals that can transmit the reference signal for sector scanning)" is 4, so as Figure 31DAs shown, among the feedback signals of the transmission panel antenna 4 in the feedback signal group 3002 of 3100_4, there are four feedback signal groups for terminals, namely, the feedback signal group 3101_41 sent to the first terminal, the feedback signal group 3101_42 sent to the second terminal, the feedback signal group 3101_43 sent to the third terminal, and the feedback signal group 3101_44 sent to the fourth terminal. In addition, for example, when “the number of time slots in which the reference signal for sector scanning can be transmitted (the number of terminals that can transmit the reference signal for sector scanning) when the terminal transmits the reference signal for sector scanning” is Ω, the structure can also be as follows. That is, among the feedback signals of the transmission panel antenna 4 in the feedback signal group 3002 of 3100_4, there are Ω feedback signal groups for terminals. Here, Ω is an integer of 1 or more or an integer of 2 or more.

[0769] Figure 32A , Figure 32B , Figure 32C and Figure 32D shows the state Figure 30 in the time interval from t4 to t5 of 4001_2, an example of the structure of the frame group 3003 including data symbols transmitted by base station #2. In addition, in Figure 32A , Figure 32B , Figure 32C and Figure 32D the horizontal axis is time.

[0770] Moreover, Figure 32A is a diagram related to the frame of the transmission panel antenna 1 of 106_1 in the frame group 3003 including data symbols. Figure 32B is a diagram related to the frame of the transmission panel antenna 2 of 106_2 in the frame group 3003 including data symbols. Figure 32C is a diagram related to the frame of the transmission panel antenna 3 of 106_3 in the frame group 3003 including data symbols. Figure 32D is a diagram related to the frame of the transmission panel antenna 4 of 106_4 in the frame group 3003 including data symbols.

[0771] In Figure 32A the example, since “the number of time slots in which the reference signal for sector scanning can be transmitted (the number of terminals that can transmit the reference signal for sector scanning) when the terminal transmits the reference signal for sector scanning” is 4, so as Figure 32AAs shown, in the frame of the transmission panel antenna 1 in the frame group 3003 including data symbols in 3200_1, there are four modulation signals (time slots) sent to terminals, namely, the modulation signal (time slot) 3201_11 sent to the first terminal, the modulation signal (time slot) 3201_12 sent to the second terminal, the modulation signal (time slot) 3201_13 sent to the third terminal, and the modulation signal (time slot) 3201_14 sent to the fourth terminal. In addition, for example, when the number of time slots for sending the reference signal for sector scanning by the terminal (the number of terminals that can send the reference signal for sector scanning) is Ω, the structure can also be as follows: in the frame of the transmission panel antenna 1 in the frame group 3003 including data symbols in 3200_1, there are Ω groups of modulation signals (time slots) sent to terminals. Here, Ω is an integer of 1 or more or an integer of 2 or more.

[0772] In addition, it is called "frame group including data symbols" because it is possible to have frames including data symbols for the transmission panel antenna 1 of 106_1, frames including data symbols for the transmission panel antenna 2 of 106_2, frames including data symbols for the transmission panel antenna 3 of 106_3, and frames including data symbols for the transmission panel antenna 4 of 106_4.

[0773] In Figure 32B the example of, since "the number of time slots for sending the reference signal for sector scanning by the terminal (the number of terminals that can send the reference signal for sector scanning)" is 4, as Figure 32B shown, in the frame of the transmission panel antenna 2 in the frame group 3003 including data symbols in 3200_2, there are four modulation signals (time slots) sent to terminals, namely, the modulation signal (time slot) 3201_21 sent to the first terminal, the modulation signal (time slot) 3201_22 sent to the second terminal, the modulation signal (time slot) 3201_23 sent to the third terminal, and the modulation signal (time slot) 3201_24 sent to the fourth terminal. In addition, for example, when the number of time slots for sending the reference signal for sector scanning by the terminal (the number of terminals that can send the reference signal for sector scanning) is Ω, the structure can also be as follows: in the frame of the transmission panel antenna 2 in the frame group 3003 including data symbols in 3200_2, there are Ω groups of modulation signals (time slots) sent to terminals. Here, Ω is an integer of 1 or more or an integer of 2 or more.

[0774] In Figure 32CIn the example, since "the number of time slots for transmitting the reference signal for sector scanning (the number of terminals that can transmit the reference signal for sector scanning) when the terminal transmits the reference signal for sector scanning" is 4, so as Figure 32C shown, in the frame of the transmission panel antenna 3 in the frame group 3003 including data symbols of 3200_3, there are four modulation signals (time slots) sent to the terminals, namely, the modulation signal (time slot for the first terminal) 3201_31 sent to the first terminal, the modulation signal (time slot for the second terminal) 3201_32 sent to the second terminal, the modulation signal (time slot for the third terminal) 3201_33 sent to the third terminal, and the modulation signal (time slot for the fourth terminal) 3201_34 sent to the fourth terminal. In addition, for example, when "the number of time slots for transmitting the reference signal for sector scanning (the number of terminals that can transmit the reference signal for sector scanning) when the terminal transmits the reference signal for sector scanning" is Ω, it can also be the following structure, that is, in the frame of the transmission panel antenna 3 in the frame group 3003 including data symbols of 3200_3, there are Ω groups of modulation signals (time slots) sent to the terminals. Here, Ω is an integer of 1 or more or an integer of 2 or more.

[0775] In Figure 32D the example, since "the number of time slots for transmitting the reference signal for sector scanning (the number of terminals that can transmit the reference signal for sector scanning) when the terminal transmits the reference signal for sector scanning" is 4, so as Figure 32D shown, in the frame of the transmission panel antenna 4 in the frame group 3003 including data symbols of 3200_4, there are four modulation signals (time slots) sent to the terminals, namely, the modulation signal (time slot for the first terminal) 3201_41 sent to the first terminal, the modulation signal (time slot for the second terminal) 3201_42 sent to the second terminal, the modulation signal (time slot for the third terminal) 3201_43 sent to the third terminal, and the modulation signal (time slot for the fourth terminal) 3201_44 sent to the fourth terminal. In addition, for example, when "the number of time slots for transmitting the reference signal for sector scanning (the number of terminals that can transmit the reference signal for sector scanning) when the terminal transmits the reference signal for sector scanning" is Ω, it can also be the following structure, that is, in the frame of the transmission panel antenna 4 in the frame group 3003 including data symbols of 3200_4, there are Ω groups of modulation signals (time slots) sent to the terminals. Here, Ω is an integer of 1 or more or an integer of 2 or more.

[0776] Figure 41 is a diagram showing an example related to the occupation of the terminal in the "sector scanning reference signal" transmission section of the terminal according to the present embodiment. In addition, Figure 41 is related to Figure 13The example related to the occupancy of the terminals of "the transmission interval 1301_1 of the sector scan reference signal for the first terminal, the transmission interval 1301_2 of the sector scan reference signal for the second terminal, the transmission interval 1301_3 of the sector scan reference signal for the third terminal, and the transmission interval 1301_4 of the sector scan reference signal for the fourth terminal" in the time interval from t1 to t2 shown

[0777] is given.

[0778] For example, as Figure 41 shown, terminal #1 of 902_1 transmits the sector scan reference signal 4101_1 in the transmission interval of the sector scan reference signal for the fourth terminal in 1301_4. Terminal #2 of 902_2 transmits the sector scan reference signal 4101_2 in the transmission interval of the sector scan reference signal for the first terminal in 1301_1. Terminal #3 of 902_3 transmits the sector scan reference signal 4101_3 in the transmission interval of the sector scan reference signal for the third terminal in 1301_3.

[0779] In addition, the information transmitted by the sector scan reference signal 4101_1 transmitted by terminal #1 of 902_1 is the information as described in the descriptions in Embodiment 1, Embodiment 2, etc.

[0780] The information transmitted by the sector scan reference signal 4101_2 transmitted by terminal #2 of 902_2 is the information as described in the descriptions in Embodiment 1, Embodiment 2, etc.

[0781] The information transmitted by the sector scan reference signal 4101_3 transmitted by terminal #3 of 902_3 is the information as described in the descriptions in Embodiment 1, Embodiment 2, etc.

[0782] For the time interval from t2 to t3 in the case of the example shown for the time interval from t1 to t2 Figure 41 is described using Figures 42A to 42D .

[0783] Thus, as Figure 42A shown, base station #2 of 4001_2 transmits "the feedback signal 4201_2 sent to terminal #2" as "the feedback signal of transmission panel antenna 1 in the feedback signal group 3002 of 3100_1" and "the feedback signal 3101_11 sent to the first terminal".

[0784] Moreover, as Figure 42BAs shown, the base station #2 of 4001_2 sends the "feedback signal from 4201_3 to terminal #3" as the "feedback signal of transmission panel antenna 2 in feedback signal group 3002 of 3100_2" and the "feedback signal from 3101_23 to the 3rd terminal".

[0785] As Figure 42C shown, the base station #2 of 4001_2 sends the "feedback signal from 4201_1 to terminal #1" as the "feedback signal of transmission panel antenna 3 in feedback signal group 3002 of 3100_3" and the "feedback signal from 3101_34 to the 4th terminal".

[0786] As Figure 42D shown, the base station #2 of 4001_2 does not allocate the "feedback signal of transmission panel antenna 4 in feedback signal group 3002 of 3100_4". Therefore, for example, the base station #2 of 4001_2 does not send signals from panel antenna 4.

[0787] At this time, assume Figure 42A that in the "feedback signal from 4201_2 to terminal #2", for example, it contains the information that terminal #2 with 902_2 can communicate with transmission panel antenna 1 of 106_1 (with the base station #2 of 4001_2).

[0788] Assume Figure 42B that in the "feedback signal from 4201_3 to terminal #3", for example, it contains the information that terminal #3 with 902_3 can communicate with transmission panel antenna 2 of 106_2 (with the base station #2 of 4001_2).

[0789] Assume Figure 42C that in the "feedback signal from 4201_1 to terminal #1", for example, it contains the information that terminal #1 with 902_1 can communicate with transmission panel antenna 3 of 106_3 (with the base station #2 of 4001_2).

[0790] In addition, other information may also be included in each feedback signal sent to the terminal. Examples thereof are the information described in the descriptions of Embodiment 1, Embodiment 2, etc.

[0791] In addition, based on the sector scan reference signal 4101_1 sent by terminal #1 with 902_1, the base station #2 of 4001_2 selects a transmission panel antenna (selects transmission panel antenna 3 as Figure 41 shown), sets the parameters of beamforming, and sends the feedback signal 4201_1 to terminal #1. Figure 42C shown), sets the parameters of beamforming, and sends the feedback signal 4201_1 to terminal #1.

[0792] Based on the Figure 41For the sector scan reference signals 4101_2 and 4001_2, base station #2 selects a transmit panel antenna (such as Figure 42A selecting transmit panel antenna 1 as shown), sets the beamforming parameters, and transmits the feedback signal 4201_2 to terminal #2.

[0793] Based on the Figure 41 sector scan reference signals 4101_3 and 4001_2 transmitted by terminal #3 on 902_3, base station #2 selects a transmit panel antenna (such as Figure 42B selecting transmit panel antenna 2 as shown), sets the beamforming parameters, and transmits the feedback signal 4201_3 to terminal #3.

[0794] Next, for the time interval from t2 to t3, for the time interval from t4 to t5 in the case of the example shown in Figures 42A to 42D the following, the Figures 43A to 43D is used for explanation.

[0795] For example, as shown in Figure 43A the figure, base station #2 of 4001_2 transmits the "modulation signal (time slot) for terminal #2 of 4301_2" as the "modulation signal (time slot) for the first terminal of 3201_11" in the "frame of transmit panel antenna 1 in the frame group 3003 containing data symbols of 3200_1". In addition, the "modulation signal (time slot) for terminal #2 of 4301_2" contains data for terminal #2 on 902_2. Also, the "modulation signal (time slot) for terminal #2 of 4301_2" is transmitted using transmit panel antenna 1. Moreover, the setting method of the transmission method of the "modulation signal (time slot) for terminal #2 of 4301_2" is the method described in the explanations in Embodiment 1, Embodiment 2, etc. For example, as described in the explanation in Embodiment 2, multiple modulation signals (time slots) can be allocated to one terminal.

[0796] As shown in Figure 43B the figure, base station #2 of 4001_2 transmits the "modulation signal (time slot) for terminal #3 of 4301_3" as the "modulation signal (time slot) for the third terminal of 3201_23" in the "frame of transmit panel antenna 2 in the frame group 3003 containing data symbols of 3200_2". In addition, the "modulation signal (time slot) for terminal #3 of 4301_3" contains data for terminal #3 on 902_3. Also, the "modulation signal (time slot) for terminal #3 of 4301_3" is transmitted using transmit panel antenna 2. Moreover, the setting method of the transmission method of the "modulation signal (time slot) for terminal #3 of 4301_3" is the method described in the explanations in Embodiment 1, Embodiment 2, etc. For example, as described in the explanation in Embodiment 2, multiple modulation signals (time slots) can be allocated to one terminal.

[0797] As Figure 43C shown, the base station #2 of 4001_2 transmits the "modulation signal (time slot) sent from 4301_1 to terminal #1" as the "frame of the transmission panel antenna 3 in the frame group 3003 of 3200_3 containing data symbols" and the "modulation signal (time slot) sent from 3201_34 to the 4th terminal". In addition, the "modulation signal (time slot) sent from 4301_1 to terminal #1" contains the data sent to terminal #1 of 902_1. Additionally, the "modulation signal (time slot) sent from 4301_1 to terminal #1" is transmitted using the transmission panel antenna 3. Moreover, the setting method of the transmission method of the "modulation signal (time slot) sent from 4301_1 to terminal #1" is the method described in the explanations in Embodiment 1, Embodiment 2, etc. For example, as described in the explanation in Embodiment 2, multiple modulation signals (time slots) can be allocated to be sent to one terminal.

[0798] As Figure 43D shown, no modulation signal (time slot) is allocated to the "frame of the transmission panel antenna 4 in the frame group 3003 of 3200_4 containing data symbols", so the base station #2 of 4001_2 does not transmit a modulation signal (time slot).

[0799] In addition, in Figure 43A the "modulation signal (time slot) sent from 4301_2 to terminal #2", in addition to data symbols, it can also contain "reference signals such as DMRS, PTRS, SRS", pilot symbols, pilot signals, preambles, symbols containing control information, etc. In addition, as the symbol containing control information, information about the terminal that is the destination of transmission (ID capable of identifying the terminal), the transmission method of the modulation signal, information about the modulation method, information about the error correction coding method (code length, coding rate, etc.), information about MCS, etc. can be considered.

[0800] In Figure 43B the "modulation signal (time slot) sent from 4301_3 to terminal #3", in addition to data symbols, it can also contain "reference signals such as DMRS, PTRS, SRS", pilot symbols, pilot signals, preambles, symbols containing control information, etc. In addition, as the symbol containing control information, information about the terminal that is the destination of transmission (ID capable of identifying the terminal), the transmission method of the modulation signal, information about the modulation method, information about the error correction coding method (code length, coding rate, etc.), information about MCS, etc. can be considered.

[0801] In Figure 43CIn the "modulation signal (time slot) of 4301_1 sent to terminal #1", in addition to data symbols, it may also include "reference signals such as DMRS, PTRS, SRS", pilot symbols, pilot signals, preambles, symbols containing control information, etc. In addition, as symbols containing control information, information about the terminal that is the destination of transmission (ID capable of identifying the terminal), the transmission method of the modulation signal, information about the modulation method, information about the error correction coding method (code length, coding rate, etc.), information about MCS, etc. can be considered.

[0802] As described above, the base station #2 of 4001_2 assigns symbols for the terminal that is the destination of transmission to the modulation signals transmitted by the transmitting panel antennas, and distributes the modulation signals to each transmitting panel antenna. Therefore, the effect of improving the data transmission efficiency in the system can be obtained. In addition, the terminal can obtain the following effect by transmitting the reference signal for sector scanning in a manner that reduces the number of collisions, that is, the communication capacity in the system composed of the base station and the terminal can be improved.

[0803] Moreover, Figure 40 The terminal #1 of 902_1, the terminal #2 of 902_2, and the terminal #3 of 902_3 can communicate as described below. In addition, hereinafter, the following notation is used to identify the panel antennas (transmitting panel antennas) possessed by each terminal. For example, In "m" represents the panel antenna possessed by terminal #m, and "n" is the number used to identify the panel antenna. For example, can represent panel antenna 1 possessed by terminal #1, and can respectively represent panel antenna 1 possessed by terminal #2 and panel antenna 3 possessed by terminal #2. In addition, for example, and can respectively be panel antenna 2 possessed by terminal #3 and panel antenna 4 possessed by terminal #3. In addition, the panel antennas used by each terminal shown below are examples, and the present disclosure is not limited thereto.

[0804] For example, the terminal #1 of 902_1 communicates with the base station #1 of 901_1 using the panel antenna possessed by the terminal #1 of 902_1. (At this time, as Figure 35A shown, the base station #1 of 901_1 uses panel antenna 1 of the base station #1 of 901_1.)

[0805] Moreover, the terminal #1 of 902_1 uses the panel antenna Communicate with Base Station #2 of 4001_2. (At this time, as Figure 43C shown, Base Station #2 of 4001_2 uses panel antenna 3 of Base Station #2 of 4001_2.)

[0806] Thus, Terminal #1 of 902_1 can communicate with both Base Station #1 of 901_1 and Base Station #2 of 4001_2, so the effect of improved data transmission efficiency can be obtained.

[0807] For example, Terminal #2 of 902_2 uses the panel antenna equipped on Terminal #2 of 902_2 to communicate with Base Station #1 of 901_1. (At this time, as Figure 35B shown, Base Station #1 of 901_1 uses panel antenna 2 of Base Station #1 of 901_1.)

[0808] Moreover, Terminal #2 of 902_2 uses the panel antenna equipped on Terminal #2 of 902_2 to communicate with Base Station #2 of 4001_2. (At this time, as Figure 43A[[END shown, Base Station #2 of 4001_2 uses panel antenna 1 of Base Station #2 of 4001_2.)

[0809] Thus, Terminal #2 of 902_2 can communicate with both Base Station #1 of 901_1 and Base Station #2 of 4001_2, so the effect of improved data transmission efficiency can be obtained.

[0810] For example, Terminal #3 of 902_3 uses the panel antenna equipped on Terminal #3 of 902_3 to communicate with Base Station #1 of 901_1. (At this time, as ​ shown, Base Station #1 of 901_1 uses panel antenna 3 of Base Station #1 of 901_1.)

[0811] Moreover, Terminal #3 of 902_3 uses the panel antenna equipped on Terminal #3 of 902_3 to communicate with Base Station #2 of 4001_2. (At this time, as ​ shown, Base Station #2 of 4001_2 uses panel antenna 3 of Base Station #2 of 4001_2.)

[0812] Thus, Terminal #3 of 902_3 can communicate with both Base Station #1 of 901_1 and Base Station #2 of 4001_2, so the effect of improved data transmission efficiency can be obtained.

[0813] As described above, when the terminal is equipped with multiple panel antennas, by using the multiple panel antennas to communicate with multiple base stations, the effect of improving the data transmission efficiency can be obtained. In addition, as in Embodiment 2, it may also be that the terminal uses multiple panel antennas to send multiple modulation signals to one base station, or the terminal uses multiple panel antennas to receive multiple modulation signals sent by one base station.

[0814] Next, an example of the communication status in the ​ shown communication status will be described. ​ The communication status in an example of the shown communication status can be the same as that in ​ , ​ . Hereinafter, Figure 26 , Figure 27 will be cited to illustrate an example of the communication status.

[0815] Figure 26 FIG. Figure 40 shows an example of the situation when the base station #2 of 4001_2 communicates with "terminal #1 of 902_1, terminal #2 of 902_2, and terminal #3 of 902_3". Figure 26 The (A) of Figure 26 shows an example of the transmission status of the modulation signal of the base station #2 of 4001_2, Figure 26 and the (B) of Figure 26 shows an example of the transmission status of the modulation signal of "terminal #1 of 902_1, terminal #2 of 902_2, and terminal #3 of 902_3". In addition, in Figure 26 , the horizontal axis is time. In addition, in Figure 18 , the same reference numerals are attached to the parts performing the same operations.

[0816] First, the base station #2 of 4001_2 sends the sector scan reference signal 1801_1. In addition, this has been described using Figure 30 , so the description is omitted.

[0817] Next, terminals such as "terminal #1 of 902_1, terminal #2 of 902_2, and terminal #3 of 902_3" send the sector scan reference signal 1851_1. In addition, this has been described using Figure 13 , Figure 14 and so on, so the description is omitted.

[0818] The base station #2 of 4001_2 sends the feedback signal group 2602_1. In addition, this has been described using Figure 31A , Figure 31B , Figure 31C , Figure 31D , so the description is omitted.

[0819] Then, base station #2 of 4001_2 transmits "frame group 2603_1 containing data symbols". In addition, this has been described using Figure 32A , Figure 32B , Figure 32C , Figure 32D , so the description is omitted. (Therefore, "frame 2603_1 containing data symbols" is regarded as a frame for downlink, for example.)

[0820] Next, terminals such as "terminal #1 of 902_1, terminal #2 of 902_2, terminal #3 of 902_3" transmit "frame group 2652_1 containing data symbols". In addition, the structure of this frame will be described later using Figure 44 . (Therefore, "frame group 2652_1 containing data symbols" is regarded as a frame for uplink, for example.)

[0821] Next, base station #2 of 4001_2 transmits "frame group 2603_2 containing data symbols". In addition, the method of constructing "frame group 2603_2 containing data symbols" is as described using Figure 32A , Figure 32B , Figure 32C , Figure 32D .

[0822] Next, terminals such as "terminal #1 of 902_1, terminal #2 of 902_2, terminal #3 of 902_3" transmit "frame group 2652_2 containing data symbols". In addition, the structure of this frame will be described later using Figure 44 .

[0823] Figure 27 Shows Figure 26 An example of the transmission status of the modulation signal of base station #2 of 4001_2 and the transmission status of the modulation signal of terminals such as "terminal #1 of 902_1, terminal #2 of 902_2, terminal #3 of 902_3" after that. In addition, in Figure 27 , the parts performing the same operation as Figure 18 are attached with the same reference numerals.

[0824] Figure 27 (A) of Figure 26 shows an example of the transmission status of the modulation signal of base station #2 of 4001_2, which is temporally consecutive to the transmission status of the modulation signal of base station #2 of 4001_2 in (A) of

[0825] Figure 27 (B) ofFigure 26 Transmission status of the modulation signals of "Terminal #1 of 902_1, Terminal #2 of 902_2, Terminal #3 of 902_3" in (B).

[0826] In addition, in Figure 27 (A) of Figure 27 in (B), the horizontal axis is time.

[0827] In Figure 26 (A) of Figure 26 in (B), after that, Base Station #2 of 4001_2 transmits "Frame Group 2603_3 containing data symbols". In addition, the method of constructing "Frame Group 2603_2 containing data symbols" is the method described as using Figure 32A , Figure 32B , Figure 32C , Figure 32D as described.

[0828] Next, terminals such as "Terminal #1 of 902_1, Terminal #2 of 902_2, Terminal #3 of 902_3" transmit "Frame Group 2652_3 containing data symbols". In addition, the structure of this frame will be described later using Figure 44 as described.

[0829] Next, Base Station #2 of 4001_2 transmits Sector Scan Reference Signal 1801_2. In addition, this has been described using Figure 30 as described, so the description is omitted.

[0830] Next, terminals such as "Terminal #1 of 902_1, Terminal #2 of 902_2, Terminal #3 of 902_3" transmit Sector Scan Reference Signal 1851_2. In addition, this has been described using Figure 13 , Figure 14 etc., so the description is omitted.

[0831] Base Station #2 of 4001_2 transmits Feedback Signal Group 2602_2. In addition, this has been described using Figure 31A , Figure 31B , Figure 31C , Figure 31D as described, so the description is omitted.

[0832] Then, Base Station #2 of 4001_2 transmits "Frame Group 2603_4 containing data symbols". In addition, this has been described using Figure 32A , Figure 32B , Figure 32C , Figure 32D as described, so the description is omitted.

[0833] Next, terminals such as "Terminal #1 of 902_1, Terminal #2 of 902_2, Terminal #3 of 902_3" send "Frame group 2652_4 containing data symbols". In addition, the structure of this frame will be described later. Figure 44 will be described.

[0834] In this way, Base Station #2 of 4001_2 and the terminal can send sector scan reference signals before "Base Station #2 of 4001_2 sends 'a frame group containing data symbols', and / or terminals such as 'Terminal #1 of 902_1, Terminal #2 of 902_2, Terminal #3 of 902_3' send 'a frame group containing data symbols'". In addition, Base Station #2 of 4001_2 and the terminal can send the sector scan reference signal again after "Base Station #2 of 4001_2 sends 'a frame group containing data symbols', and / or terminals such as 'Terminal #1 of 902_1, Terminal #2 of 902_2, Terminal #3 of 902_3' send 'a frame group containing data symbols'". In this way, by selecting the transmission panel antenna to be used and setting the transmission beamforming, the following effect can be obtained, that is, the base station and the terminal can obtain high data reception quality.

[0835] In addition, "Terminal #1 of 902_1, Terminal #2 of 902_2, Terminal #3 of 902_3" can of course communicate with Base Station #1 of 901_1 in the same way.

[0836] Alternatively, the communication between Terminal #1 of 902_1 and the two base stations (communication with Base Station #1 of 901_1 and communication with Base Station #2 of 4001_2) may not be synchronized (non - coherent or partial - coherent). For example, Terminal #1 of 902_1 can receive a feedback signal from Base Station #2 of 4001_2 (see Figure 36 ) during the period of sending (a frame group containing data symbols) to Base Station #1 of 901_1 (see Figure 42C)。As another example, it can also be that for terminal #1 of 902_1, the "type of symbol sent by base station #1 of 901_1" received is different from the "type of symbol sent by base station #2 of 4001_2" received. Moreover, it can also be that for terminal #1 of 902_1, the "type of symbol sent to base station 901_1" sent is different from the "type of symbol sent to base station #2 of 4001_2" sent. Additionally, it can also be that, similarly to terminal #1 of 902_1, the communication between terminal #2 of 902_2, terminal #3 of 902_3 and the two base stations (communication with base station #1 of 901_1 and communication with base station #2 of 4001_2) is not synchronized. In other words, when a terminal communicates with multiple base stations, the communication status between each of the multiple base stations and the terminal can be an independent status. However, the communication between the terminal and the two base stations can also be synchronized (coherent or partial - coherent).

[0837] Next, use Figure 44 to illustrate the structural example of "frame group 2652_i containing data symbols" sent by terminals such as "terminal #1 of 902_1, terminal #2 of 902_2, terminal #3 of 902_3". In addition, for example, let i be an integer greater than or equal to 1, and in Figure 44 , the horizontal axis is time.

[0838] As Figure 44 shown, "frame group 2652_i containing data symbols" is composed of a first time interval, a second time interval, a third time interval, and a fourth time interval.

[0839] Moreover, for example, terminal #1 of 902_1 uses the fourth time interval to send frame group 4401_1 (containing data symbols). And terminal #2 of 902_2 uses the first time interval to send frame group 4401_2 (containing data symbols). Terminal #3 of 902_3 uses the third time interval to send frame group 4401_3 (containing data symbols).

[0840] In addition, in Figure 44 , each terminal can use multiple time intervals to send modulation signals (time slots), and each terminal can also send multiple modulation signals (time slots) in a certain time interval. This has been described in Embodiment 1, Embodiment 2, etc.

[0841] Thus, for example, by time-division multiplexing the "frame group 2652_i containing data symbols" transmitted by terminals such as "terminal #1 of 902_1 and terminal #2 of 902_2", each terminal transmits a frame group, and the base station #2 of 4001_2 receives the frame groups transmitted by each terminal, interference can be suppressed, and thus high data reception quality can be obtained. In addition, for the base station #2 of 4001_2, according to the usage method of the panel antenna, a situation can be formed where, even if multiple terminals transmit modulation signals (time slots) at the same time, the interference between them is small.

[0842] In addition, in Figure 44 the frame groups 4401_1, 4401_2, and 4401_3, in addition to data symbols, may also include, for example, "reference signals such as DMRS, PTRS, and SRS", pilot symbols, pilot signals, preambles, symbols containing control information, etc.

[0843] In Figure 44 it is described the case of using time-division multiplexing for the frame groups transmitted by terminals, but frequency-division multiplexing can be performed on the frame groups transmitted by terminals, or spatial-division multiplexing can be performed by using a panel antenna and MU-MIMO.

[0844] Figure 45A is Figure 43A a modification of Figure 45A In Figure 43A the parts performing the same operations as in Figure 45B is Figure 43B a modification of Figure 45B In Figure 43B the parts performing the same operations as in Figure 45C is Figure 43C a modification of Figure 45C In Figure 43C the parts performing the same operations as in Figure 45D is Figure 43D a modification of Figure 45D In Figure 43D the parts performing the same operations as in

[0845] Figure 45A The difference between Figure 43A and Figure 43A is that in Figure 45A the modulation signal (time slot) 4301_2 sent to terminal #2 consists of 1 time slot, while in Figure 43A the modulation signal (time slot) 4301_2 sent to terminal #2 consists of 3 time slots. In Figure 45AIn this case, empty time slots are effectively utilized, so the data transmission efficiency is improved. In addition, regarding the effective utilization of empty time slots, Figure 45B , Figure 45C is the same. Therefore, the method of using time slots is not limited to Figure 43A , Figure 43B , Figure 43C , Figure 43D , Figure 45A , Figure 45B , Figure 45C , Figure 45D .

[0846] In addition, if we focus on Figure 45A , Figure 45B , Figure 45C , Figure 45D the second time slot in each figure, then in Figure 45A there is a modulated signal (time slot) 4301_2 sent to terminal #2, in Figure 45B there is a modulated signal (time slot) 4301_3 sent to terminal #3, and in Figure 45C there is a modulated signal (time slot) 4301_1 sent to terminal #1. For example, in this way, in Figure 45A , Figure 45B , Figure 45C , Figure 45D a certain time interval such as the second time slot in each figure, there can also be modulated signals (time slots) with different destinations according to the panel antennas. At this time, the four panel antennas can use the same frequency (the same frequency band), or they can not use the same frequency (the same frequency band).

[0847] In addition, in the case of using the same frequency (the same frequency band), it can be considered as transmission using MU-MIMO. For example, in the case where the directivity is different according to the panel antennas, the following effect can be obtained, that is, even when using MU-MIMO, interference can be reduced from each other. (In addition, the related transmission method has also been described in Embodiment 2.)

[0848] In addition, it can also be that when base station #2 at 4001_2 sends a modulated signal according to the panel antennas, for example, the modulated signal sent using panel antenna 1 and the modulated signal sent using panel antenna 2 exist in the same time interval, and the frequency (frequency band) of the modulated signal sent using panel antenna 1 is the same as or partially the same as the frequency (frequency band) of the modulated signal sent using panel antenna 2.

[0849] For example, when sending modulated signals from each panel antenna, the following Example 5-1, Example 5-2, and Example 5-3 can be considered.

[0850] Example 5-1:

[0851] The base station #2 of 4001_2 is equipped with multiple panel antennas. When transmitting modulated signals from each panel antenna, in a certain time interval, there may also be a set of modulated signals with the same or partially the same frequency (frequency band).

[0852] As another method, the frequency (frequency band) of the modulated signal transmitted by the base station #2 of 4001_2 using panel antenna 1 may also be different from the frequency (frequency band) of the modulated signal transmitted using panel antenna 2.

[0853] Example 5-2:

[0854] The base station #2 of 4001_2 is equipped with multiple panel antennas. When transmitting modulated signals from each panel antenna, there may also be a set of modulated signals with different frequencies (frequency bands).

[0855] Moreover, it may also be that the frequency (frequency band) of the modulated signal transmitted by the base station #2 of 4001_2 using panel antenna 1 is the same as the frequency (frequency band) of the modulated signal transmitted using panel antenna 2, and these two modulated signals are time-division multiplexed.

[0856] Example 5-3:

[0857] The base station #2 of 4001_2 is equipped with multiple panel antennas. When transmitting modulated signals from each panel antenna, there may also be a set of modulated signals with the same frequency (frequency band) and time-division multiplexed.

[0858] In addition, for example, when the base station #2 of 4001_2 is Figure 1A , Figure 1B , Figure 1C structured in this way, modulated signals may also be generated in the manner of "there is Example 5-1", and / or "there is Example 5-2", and / or "there is Example 5-3" according to the control signal 100, and the modulated signals are transmitted from the panel antennas. However, although the control signal 100 is set as the output from the third processing unit, it is not limited to this structure. For example, the control signal 100 may be other internal outputs, or may also be an external signal.

[0859] Next, the relationship between the modulated signal transmitted by the base station #1 of 901_1 to the terminal and the modulated signal transmitted by the base station #2 of 4001_2 to the terminal is described. Figure 40 in

[0860] For example, in Figure 40Among them, the terminal #1 of 902_1 receives the modulated signal sent by the base station #1 of 901_1 and the modulated signal sent by the base station #2 of 4001_2. At this time, it is also possible that in a certain time interval, the frequency (frequency band) of the modulated signal sent by the base station #1 of 901 (sent to the terminal #1 of 902_1) is the same as or partially the same as the frequency (frequency band) of the modulated signal sent by the base station #2 of 4001_2 (sent to the terminal #1 of 902_1).

[0861] For example, in the case where a terminal communicates with multiple base stations, the following 5-4 example, 5-5 example, and 5-6 example can be considered.

[0862] 5-4 example:

[0863] When a terminal communicates with multiple base stations, for the modulated signals sent by the multiple base stations to the terminal, in a certain time interval, there can also be a set of modulated signals with the same or partially the same frequency (frequency band).

[0864] As another method, the terminal #1 of 902_1 receives the modulated signal sent by the base station #1 of 901_1 and the modulated signal sent by the base station #2 of 4001_2. At this time, the frequency (frequency band) of the modulated signal sent by the base station #1 of 901 (sent to the terminal #1 of 902_1) can also be different from the frequency (frequency band) of the modulated signal sent by the base station #2 of 4001_2 (sent to the terminal #1 of 902_1).

[0865] 5-5 example:

[0866] When a terminal communicates with multiple base stations, for the modulated signals sent by the multiple base stations to the terminal, there can also be a set of modulated signals with different frequencies (frequency bands).

[0867] Moreover, the terminal #1 of 902_1 receives the modulated signal sent by the base station #1 of 901_1 and the modulated signal sent by the base station #2 of 4001_2. At this time, the frequency (frequency band) of the modulated signal sent by the base station #1 of 901 (sent to the terminal #1 of 902_1) is the same as the frequency (frequency band) of the modulated signal sent by the base station #2 of 4001_2 (sent to the terminal #1 of 902_1), and these two modulated signals can also be time-division multiplexed.

[0868] 5-6 example:

[0869] When a terminal communicates with multiple base stations, for the modulated signals sent by the multiple base stations to the terminal, there can also be a set of modulated signals with the same frequency (frequency band) and subject to time-division multiplexing.

[0870] In addition, for example, the base station #1 of 901_1 isFigure 1A , Figure 1B , Figure 1C structure, and Base Station #2 of 4001_2 is Figure 1A , Figure 1B , Figure 1C structure, and can also be controlled in a manner of appropriate switching, such that "Base Station #1 of 901_1 generates a modulation signal in a manner of 'there exists Instance 5-4', and / or 'there exists Instance 5-5', and / or 'there exists Instance 5-6' according to control signal 100, and transmits the modulation signal from the panel antenna", "Base Station #2 of 4001_2 generates a modulation signal in a manner of 'there exists Instance 5-4', and / or 'there exists Instance 5-5', and / or 'there exists Instance 5-6' according to control signal 100, and transmits the modulation signal from the panel antenna". However, although the structure of control signal 100 is set to the output from the third processing unit, it is not limited to this structure. For example, control signal 100 can be other internal outputs, or can also be signals from the outside.

[0871] In addition, Terminal #1 of 902_1 receives the modulation signal transmitted by Base Station #1 of 901_1 and the modulation signal transmitted by Base Station #2 of 4001_2. At this time, the modulation signal transmitted by Base Station #2 of 4001_2 (sent to Terminal #1 of 902_1) can also include part or all of the data contained in the modulation signal transmitted by Base Station #1 of 901 (sent to Terminal #1 of 902_1).

[0872] Therefore, when a terminal communicates with multiple base stations, it is also possible to obtain a certain data from two or more base stations. Thus, the effect of improved reception quality of the data can be obtained.

[0873] As described in this embodiment, the terminal can obtain the following effect by sending the reference signal for sector scanning in a manner that reduces the number of occurrences of conflicts, that is, the communication capacity in the system composed of the base station and the terminal can be improved. In addition, the structures of the terminal and the base station are not limited to Figure 1A , Figure 1B , Figure 1C structure. In addition, the structures of the transmitting panel antenna and the receiving panel antenna are not limited to Figure 3 , Figure 4 structure. For example, as long as it is a structure that can generate one or more transmitting directivities and receiving directivities of the antenna. In addition, there are signals, frames, etc. in each figure, but the names are not limited to this, and the important thing is the function of the signal itself being transmitted.

[0874] In addition, as in this embodiment, by the terminal efficiently using the panel antenna to communicate with multiple base stations, the following effects can be obtained, that is, the data transmission efficiency is improved and the data reception quality is improved.

[0875] (Embodiment 6)

[0876] In this embodiment, modifications of Embodiments 1 to 5 will be described.

[0877] Figure 46A is a diagram showing an example of the configuration of the communication system of Embodiment 6. As Figure 46A shown, it is assumed that the terminal #1 of the base stations 4601_0 and 4602_1 communicates using the first frequency (band). Additionally, it is assumed that the terminal #1 of the base stations 4601_0 and 4602_1 communicates using the second frequency (band).

[0878] Furthermore, for example, there is a method of setting the first frequency (band) to a frequency of 52.6 GHz or higher and setting the second frequency (band) to FR (Frequency Range) 1 and / or FR2. However, FR1 is set to "a frequency from 450 MHz to 6 GHz or lower", and FR2 is set to "a frequency from 24.25 GHz to 52.6 GHz". Additionally, as another example, the first frequency (band) may also be a frequency higher than the second frequency (band). Moreover, the first frequency (band) can be set to FR2, and the second frequency (band) can be set to FR1.

[0879] Figure 46B is a diagram showing an example of the configuration of a communication system different from that of Figure 46A Embodiment 6. As Figure 46B shown, the base station #1 of 4601_1 communicates with the terminal #1 of 4602_1 using the first frequency (band). Additionally, the base station #2 of 4601_2 communicates with the terminal #2 of 4602_1 using the second frequency (band). Moreover, the base station #1 of 4601_1 and the base station #2 of 4601_2 communicate using wired and / or wireless means.

[0880] Figure 47 is a diagram showing an example of the configuration of the terminal of Embodiment 6. The communication device 4702 for the first frequency is a device that generates and transmits a modulated signal of the first frequency (band). Additionally, the communication device 4702 for the first frequency is a device that receives and demodulates a modulated signal of the first frequency (band).

[0881] Therefore, the communication device 4702 for the first frequency takes the control signal 4722 as input. When the control signal 4722 contains the information of the modulation signal generating the first frequency (band), it takes the data 4701 as input, performs error correction coding, modulation (mapping based on the modulation method), processing for transmission (e.g., processing for SISO (Single Input Single Output), MIMO, MISO (Multiple Input Single Output)), frequency conversion, amplification, etc., generates a modulation signal, and transmits it as radio waves.

[0882] In addition, the communication device 4702 for the first frequency receives the modulation signal (radio waves) of the first frequency (band) sent by the communication object based on the information of the control signal 4722, performs frequency conversion, processing for reception, error correction decoding, etc., and outputs the received data 4703.

[0883] Furthermore, the specific structure of the communication device 4702 for the first frequency can also be, for example, Figure 1A , Figure 1B , Figure 1C the structures shown. The operation examples of the communication device 4702 for the first frequency have been described in Embodiments 1 to 5, etc.

[0884] The communication device 4712 for the second frequency is a device that generates and transmits a modulation signal of the second frequency (band). In addition, the communication device 4712 for the second frequency is a device that receives and demodulates the modulation signal of the second frequency (band).

[0885] Therefore, the communication device 4712 for the second frequency takes the control signal 4722 as input. When the control signal 4722 contains the information of the modulation signal generating the second frequency (band), it takes the data 4711 as input, performs error correction coding, modulation (mapping based on the modulation method), processing for transmission (e.g., processing for SISO, MIMO, MISO), frequency conversion, amplification, etc., generates a modulation signal, and transmits it as radio waves.

[0886] In addition, the communication device 4712 for the second frequency receives the modulation signal (radio waves) of the second frequency (band) sent by the communication object based on the information of the control signal 4722, performs frequency conversion, processing for reception, error correction decoding, etc., and outputs the received data 4713.

[0887] Furthermore, the specific structure of the communication device 4712 for the second frequency can also be, for example, Figure 1A , Figure 1B , Figure 1CThe structure shown. The operation example of the communication device 4712 for the second frequency has been described in Embodiments 1 to 5 and the like.

[0888] The control unit 4721 takes the received data 4703 and 4713 as inputs, generates and outputs a control signal 4722, and the control signal 4722 contains information on the control signal for transmission at the first frequency (band), the control signal for reception at the first frequency (band), the control signal for transmission at the second frequency (band), and the control signal for reception at the second frequency (band).

[0889] Figure 48 FIG. is an example showing the structure of the base station according to Embodiment 6. The communication device 4802 for the first frequency is a device that generates and transmits a modulation signal at the first frequency (band). In addition, the communication device 4802 for the first frequency is a device that receives and demodulates the modulation signal at the first frequency (band).

[0890] Therefore, the communication device 4802 for the first frequency takes the control signal 4822 as an input. When the control signal 4822 contains the information of generating the modulation signal at the first frequency (band), it takes the data 4801 as an input, performs error correction coding, modulation (mapping based on the modulation method), processing for transmission (for example, processing for SISO, SIMO, MIMO, MISO), frequency conversion, amplification, etc., generates a modulation signal, and transmits it as a radio wave.

[0891] In addition, based on the information of the control signal 4822, the communication device 4802 for the first frequency receives the modulation signal (radio wave) at the first frequency (band) transmitted by the communication object, performs frequency conversion, processing for reception, error correction decoding, etc., and outputs the received data 4803.

[0892] In addition, the specific structure of the communication device 4802 for the first frequency may also be, for example Figure 1A , Figure 1B , Figure 1C The structure shown. The operation example of the communication device 4802 for the first frequency has been described in Embodiments 1 to 5 and the like.

[0893] The communication device 4812 for the second frequency is a device that generates and transmits a modulation signal at the second frequency (band). In addition, the communication device 4812 for the second frequency is a device that receives and demodulates the modulation signal at the second frequency (band).

[0894] Therefore, the communication device 4812 operating at the second frequency takes the control signal 4822 as input. When the control signal 4822 contains information about the modulation signal for generating the second frequency (band), it takes the data 4811 as input, performs error correction coding, modulation (mapping based on the modulation method), processing for transmission (e.g., processing for SISO, SIMO, MIMO, MISO), frequency conversion, amplification, etc., generates a modulation signal, and transmits it as a radio wave.

[0895] In addition, the communication device 4812 operating at the second frequency receives the modulation signal (radio wave) of the second frequency (band) sent by the communication object based on the information of the control signal 4822, performs frequency conversion, processing for reception, error correction decoding, etc., and outputs the received data 4813.

[0896] The control unit 4821 takes the received data 4803 and 4813 as input, generates and outputs the control signal 4822, which contains information about the control signal for transmission at the first frequency (band), the control signal for reception at the first frequency (band), the control signal for transmission at the second frequency (band), and the control signal for reception at the second frequency (band).

[0897] In addition, Figure 46A and Figure 46B the base station #1 of 4601_1 and the base station #2 of 4601_2 shown may also have Figure 48 the structure.

[0898] Figure 49A is a diagram showing an example of the structure of the base station #1 of 4601_1 in Embodiment 6. The communication device 4902 operating at the first frequency is a device that generates and transmits a modulation signal of the first frequency (band). In addition, the communication device 4902 operating at the first frequency is a device that receives and demodulates the modulation signal of the first frequency (band). Figure 46B Therefore, the communication device 4902 operating at the first frequency takes the first control signal 4904 as input. When it is necessary to generate a modulation signal of the first frequency (band) based on the information such as the first control signal 4904, it takes the data 4901 as input, performs error correction coding, modulation (mapping based on the modulation method), processing for transmission (e.g., processing for SISO, SIMO, MIMO, MISO), frequency conversion, amplification, etc., generates a modulation signal, and transmits it as a radio wave.

[0899]

[0900] ​In addition, the communication device 4902 operating at the first frequency receives a modulated signal (radio wave) at the first frequency (band) transmitted by a communication object based on information such as the first control signal 4904, performs frequency conversion, processing for reception, error correction decoding, etc., and outputs received data 4903.

[0901] Furthermore, the communication device 4902 operating at the first frequency may also output a second control signal 4905. In this case, the first control signal 4904 is a signal obtained from the base station #2 of 4601_2 via a network, and the second control signal 4905 is transmitted to the base station #2 of 4601_2 via the network.

[0902] Figure 49B It shows the Figure 46B An example of the structure of the base station #2 of 4601_2 in Embodiment 6. The communication device 4912 operating at the second frequency is a device that generates and transmits a modulated signal at the second frequency (band). In addition, the communication device 4912 operating at the second frequency is a device that receives and demodulates a modulated signal at the second frequency (band).

[0903] Therefore, the communication device 4912 operating at the second frequency takes the third control signal 4914 as an input. When it is necessary to generate a modulated signal at the second frequency (band) based on information such as the third control signal 4914, it takes the data 4911 as an input, performs error correction coding, modulation (mapping based on the modulation method), processing for transmission (e.g., processing for SISO, SIMO, MIMO, MISO), frequency conversion, amplification, etc., generates a modulated signal, and transmits it as a radio wave.

[0904] In addition, the communication device 4912 operating at the second frequency receives a modulated signal (radio wave) at the second frequency (band) transmitted by a communication object based on information such as the third control signal 4914, performs frequency conversion, processing for reception, error correction decoding, etc., and outputs received data 4913.

[0905] Furthermore, the communication device 4912 operating at the second frequency may also output a fourth control signal 4915. At this time, the third control signal 4914 is a signal obtained from the base station #1 of 4601_1 via a network, and the fourth control signal 4915 is transmitted to the base station #1 of 4601_1 via the network.

[0906] Figure 50A 、 Figure 50B and Figure 50C Is a diagram showing an example of the transmission status from time t0 to time t5.

[0907] Figure 50A Shows Figure 46A An example of a modulated signal at the first frequency (band) transmitted by the base station 4601_0 in, orFigure 46B An example of a modulated signal of the first frequency (band) transmitted by base station #1 of 4601_1.

[0908] In addition, Figure 50A In the Figure 10 The same reference numerals are attached to the parts having the same operation.

[0909] Figure 50B Shows Figure 46A and Figure 46B An example of a modulated signal of the second frequency (band) sent by terminal #1 of 4602_1.

[0910] Figure 50C Shows Figure 46A An example of a modulation signal of the second frequency (band) transmitted by the base station 4601_0 in Figure 46B An example of a modulated signal of the second frequency (band) sent by base station #2 of 4601_2.

[0911] right Figure 46A An operation example of the communication system shown will be described.

[0912] like Figure 50A As shown, Figure 46A The base station 4601_0 sends a reference signal 1001 for sector scanning in the time interval from time t0 to time t1.

[0913] Furthermore, the time interval from time t1 to time t2 is a response interval of the terminal.

[0914] like Figure 50A As shown, Figure 46A The base station 4601_0 sends a feedback signal 1002 in the time interval from time t2 to time t3.

[0915] Figure 11 Shows Figure 46A The base station 4601_0 sends Figure 50A An example of a sector scan using reference signal 1001. Figure 11 The action has been explained, so the explanation is omitted.

[0916] Figure 12 Shows Figure 11 An example of the structure of the "reference signal 1101_i for sector scanning in the transmission panel antenna i". Figure 12 The action has been explained, so the explanation is omitted.

[0917] Then, if Figure 50B As shown, Figure 46A Terminal #1 of 4602_1 uses the second frequency (band) to send frame T1 of 5001_1.

[0918] At this time, it is also possible to, as shown in the following Figure 51 Use the PUCCH (Physical Uplink Control Channel) to send the frame T1 of 5001_1.

[0919] Figure 51 is a diagram showing an example of the PUCCH of the terminal. In Figure 51 the horizontal axis is time and the vertical axis is frequency.

[0920] For example, Figure 46A the terminal #1 of 4602_1 uses Figure 51 the "Terminal #1 Sends PUCCH" 5101_1 shown in the figure to send the frame T1 of 5001_1.

[0921] In addition, in other frequencies, there may also be "Terminal #x Sends PUCCH" 5101_x sent by terminal #x.

[0922] In addition, in addition to the PUCCH, the RACH (Random Access Channel), PUSCH (Physical Uplink Shared Channel), etc. can also be used to send the frame T1 of 5001_1, and it is not limited to these channels.

[0923] Figure 52 is a diagram showing Figure 46A an example of the structure of the frame T1 of 5001_1 sent by the terminal #1 of 4602_1.

[0924] For example, assume that in the frame T1 of 5001_1 sent by the terminal #1 of 4602_1 in Figure 46A it contains the "Information Related to Sector Scanning of the First Frequency (Band)" 5201 and the "Request Information for the Terminal to Request to Execute / Not Execute Transmission of the First Frequency (Band)" 5202.

[0925] Assume that in the "Information Related to Sector Scanning of the First Frequency (Band)" 5201, it contains Figure 46A the information of the "Transmission Panel Antenna and Parameter Number of Base Station 4601_0" for which the reception quality of the sector scanning reference signal 1001 sent by the base station 4601_0 in

[0926] In addition, this information can be generated by obtaining the reference signal 1001 for sector scanning and the "ID (identification number) of the transmission panel antenna" and the "identification number (ID) of the parameters used for beamforming (directivity control)" included in the reference signal 1001 for sector scanning.

[0927] Assume that in the "request information for the terminal to request to execute / abandon transmission at the first frequency" 5202, it includes information indicating Figure 46A whether the terminal #1 of 4602_1 performs transmission at the first frequency (band) to the base station 4601_0.

[0928] Figure 46A The base station 4601_0 of receives the frame T1 of 5001_1 transmitted by the terminal #1 of 4602_1. Subsequently, for example, in the time interval from time t2 to time t3, the base station 4601_0 transmits the frame B1 of 5011_1.

[0929] Figure 53 FIG. Figure 46A shows an example of the structure of the frame B1 of 5011_1 transmitted by the base station 4601_0 using the second frequency (band).

[0930] For example, assume that in Figure 46A the frame B1 of 5011_1 transmitted by the base station 4601_0, it includes "information 5301 related to the allocation of frames including data symbols at the first frequency".

[0931] Assume that in the "information 5301 related to the allocation of frames including data symbols at the first frequency", it at least includes Figure 46A information on the time slots of the data symbols transmitted by the base station 4601_0 to the terminal #1 of 4602_1.

[0932] For example, as Figure 17 shown, Figure 50A the frame 1003 including data symbols is composed of the modulation signal (time slot) 1701_1 sent to the first terminal, the modulation signal (time slot) 1701_2 sent to the second terminal, the modulation signal (time slot) 1701_3 sent to the third terminal, and the modulation signal (time slot) 1701_4 sent to the fourth terminal. Figure 46A The base station 4601_0 of Figure 17 for example uses the modulation signal (time slot) 1701_1 sent to the first terminal of Figure 17 to transmit a frame including data symbols to the terminal #1 of 4602_1.

[0933] In this case, Figure 53 in the "information 5301 related to the allocation of frames including data symbols at the first frequency", it includes "information indicating that a frame including data symbols has been transmitted using the modulation signal (time slot) 1701_1 sent to the first terminal".

[0934] Therefore, Figure 46A The terminal #1 of 4602_1 can know the position of the frame containing data symbols sent by the base station 4601_0 to the terminal #1 of 4602_1 by obtaining "information related to the allocation of frames containing data symbols of the first frequency" 5301. Moreover, Figure 46A The terminal #1 of 4602_1 can receive the modulated signal of the first frequency (band) sent by the base station 4601_0 to obtain the data contained in the data symbols.

[0935] In addition, Figure 50A The method of constructing the frame containing data symbols sent by the base station 4601_0 is not limited to Figure 17 . Figure 50A Other methods of constructing the frame containing data symbols are, for example, the methods described in the descriptions of Embodiments 1 to 5.

[0936] In addition, Figure 46A In the frame B1 of 5011_1 sent by the base station 4601_0 using the second frequency (band), not only the information on the position of the data symbols is included, but also, for example, the information related to the error correction coding method for generating the data symbols, the information on the transmission method for generating the data symbols, the information on the modulation method for generating the data symbols, etc.

[0937] Thus, as Figure 50A shown, Figure 46A The base station 4601_0 sends the "frame 1003 containing data symbols" destined for the terminal #1 of 4602_1 in the time interval from time t4 to time t5. Figure 46A

[0938] The operation when the "request information for the terminal to request to execute / not execute the first frequency transmission" 5202 in Figure 52 indicates "not execute" will be described.

[0939] When 5202 indicates "not execute", Figure 46A The terminal #1 of 4602_1 does not send the modulated signal of the first frequency (band).

[0940] Therefore, when the terminal #1 of 4602_1 needs to transmit data to the base station 4601_0, the terminal #1 of 4602_1 sends, for example, the modulated signal of the second frequency (band) or the modulated signal of the third frequency (band).

[0941] In addition, the third frequency (band) is a frequency (band) different from the first frequency (band), and the third frequency (band) is a frequency (band) different from the second frequency (band).

[0942] For Figure 52 the operation when the “request information for the terminal to execute / not execute transmission at the first frequency” in

[0943] indicates “execute” at 5202 is described. Figure 46A When 5202 indicates “execute”,

[0944] Therefore, Figure 46A the terminal #1 of 4602_1 needs to send a signal for sector scanning. That is, the terminal #1 of 4602_1 sends a signal for sector scanning to determine the antenna and beamforming parameters for the terminal #1 to transmit and the antenna and beamforming parameters for the base station 4601_0 to receive.

[0945] Figure 54 is a diagram showing Figure 46A an example when the terminal #1 of 4602_1 sends a sector scanning signal. In Figure 54 the same reference numerals are attached to the parts that perform the same operations as Figure 13 ones.

[0946] For example, in the time interval from time t1 to time t2 in Figure 50A , Figure 50B , Figure 50C the terminal #1 of 4602_1 uses the first frequency (band) to send a reference signal for sector scanning. For the detailed method, it has been described in Embodiments 1 to 5, etc., so it is simply described here. Figure 46A

[0947] As Figure 54 shown, Figure 46A Figure 46A the terminal #1 of 4602_1 in the “transmission interval for the first terminal using the ‘reference signal for sector scanning’” 1301_1 sends the reference signal for sector scanning 5401_1. Then, Figure 46A the base station 4601_0 determines the “antenna and beamforming parameters for the terminal #1 of 4602_1 to transmit and the antenna and beamforming parameters for the base station 4601_0 to receive” by receiving the reference signal for sector scanning 5401_1 and, for example, sending a modulation signal to the terminal #1 of 4602_1. For details, it has been described in Embodiments 1 to 5, etc., so the description is omitted.

[0948] In addition, the following situation has been described above, that is, “in the time interval from time t1 to time t2 in Figure 50A , Figure 50B , Figure 50C the time interval of Figure 46AThe terminal #1 of 4602_1 uses the first frequency (band) to send a reference signal for sector scanning”, but “ Figure 46A The time interval during which the terminal #1 of 4602_1 uses the first frequency (band) to send a reference signal for sector scanning is not limited to this time interval.

[0949] For example, Figure 46A The terminal #1 of 4602_1 can use the first frequency (band) to send a reference signal for sector scanning during the terminal response interval of other time periods, or can also send a reference signal for sector scanning during the interval of sending data symbols.

[0950] Figure 46A After the terminal #1 of 4602_1 sends a reference signal for sector scanning, it sends a frame containing data symbols to the base station 4601_0.

[0951] Figure 55 It is a diagram for explaining an example of a modulation signal of the first frequency transmitted by the terminal #1. In Figure 55 Among them, the same reference numerals are attached to the parts that perform the same operations as Figure 20 the same.

[0952] As Figure 55 shown, Figure 46A The terminal #1 of 4602_1 sends a frame 5501_1 containing data symbols in the first time interval of the frame 1851_i containing data symbols.

[0953] The method for selecting the time interval for the frame sent by the terminal #1 of 4602_1 has been described in Embodiments 1 to 5, etc., so the description is omitted.

[0954] In the frame 1003 containing data symbols sent by the base station 4601_0 in the above description, the base station 4601_0 can also use a transmission method of transmitting multiple modulation signals using multiple antennas. Figure 50A In the frame 1003 containing data symbols sent by the base station 4601_0 in the above description, the base station 4601_0 can also use a transmission method of transmitting multiple modulation signals using multiple antennas.

[0955] In addition, this has been described in detail in Embodiments 1 to 5, etc. Also, in the frame T1 of 5001_1 sent by the terminal #1 of 4602_1, the terminal #1 of 4602_1 can also use a transmission method of transmitting multiple modulation signals using multiple antennas. Moreover, in the frame B1 of 5011_1 sent by the base station 4601_0, the base station 4601_0 can also use a transmission method of transmitting multiple modulation signals using multiple antennas. Figure 50B In the frame T1 of 5001_1 sent by the terminal #1 of 4602_1, the terminal #1 of 4602_1 can also use a transmission method of transmitting multiple modulation signals using multiple antennas. Moreover, in the frame B1 of 5011_1 sent by the base station 4601_0, the base station 4601_0 can also use a transmission method of transmitting multiple modulation signals using multiple antennas. Figure 50C In the frame B1 of 5011_1 sent by the base station 4601_0, the base station 4601_0 can also use a transmission method of transmitting multiple modulation signals using multiple antennas.

[0956] In addition, when the base station 4601_0 transmits a modulated signal using the second frequency (band), it can also use a transmission method that transmits multiple modulated signals using multiple antennas.

[0957] Moreover, when the terminal #1 of 4602_1 transmits a modulated signal using the first frequency (band), it can also use a transmission method that transmits multiple modulated signals using multiple antennas.

[0958] For Figure 46B the operation example of the communication system shown will be described.

[0959] As Figure 50A shown, Figure 46B the base station #1 of 4601_1 transmits the sector scan reference signal 1001 in the time interval from time t0 to time t1.

[0960] In addition, the time interval from time t1 to time t2 is the response interval of the terminal.

[0961] As Figure 50A shown, Figure 46B the base station #1 of 4601_1 transmits the feedback signal 1002 in the time interval from time t2 to time t3.

[0962] Figure 11 Shows Figure 46B an example of the Figure 50A sector scan reference signal 1001 transmitted by the base station #1 of 4601_1. For Figure 11 the operation has been described, so the description is omitted.

[0963] Figure 12 Shows Figure 11 a structural example of the "sector scan reference signal 1101_i in transmission panel antenna i". For Figure 12 the operation has been described, so the description is omitted.

[0964] Next, as Figure 50B shown, Figure 46A the terminal #1 of 4602_1 transmits the frame T1 of 5001_1 using the second frequency (band).

[0965] At this time, as Figure 51 shown, PUCCH can also be used for the frame T1 of 5001_1.

[0966] For example, Figure 46B the terminal #1 of 4602_1 transmits Figure 51 the "terminal #1 transmits PUCCH" 5101_1 as the frame T1 of 5001_1.

[0967] In addition, in other frequencies, there may also be "Terminal #x Sends PUCCH" 5101_x sent by Terminal #x.

[0968] In addition, in addition to PUCCH, RACH, PUSCH, etc. can also be used to send frame T1 of 5001_1, and it is not limited to these channels.

[0969] Figure 52 Shows Figure 46B An example of the structure of frame T1 of 5001_1 sent by Terminal #1 of 4602_1.

[0970] For example, assume that in Figure 46B Frame T1 of 5001_1 sent by Terminal #1 of 4602_1, it contains "Information Related to Sector Scanning of the First Frequency (Band)" 5201 and "Request Information for the Terminal to Request to Implement / Not Implement Transmission of the First Frequency (Band)" 5202.

[0971] Assume that in "Information Related to Sector Scanning of the First Frequency (Band)" 5201, it contains Figure 46B The information of "Transmission Panel Antenna and Parameter Number of Base Station #1 of 4601_1" with good reception quality of the sector scanning reference signal 1001 sent by Base Station #1 of 4601_1 for Terminal #1 of 4602_1. This has been described in Embodiments 1 to 5, etc.

[0972] In addition, this information can be generated by obtaining the sector scanning reference signal 1001 and the "ID (Identification Number) of the Transmission Panel Antenna" and the "Identification Number (ID) of the Parameters Used for Beamforming (Directivity Control)" contained in the sector scanning reference signal 1001.

[0973] Assume that in "Request Information for the Terminal to Request to Implement / Not Implement Transmission of the First Frequency" 5202, it contains information indicating Figure 46B Whether Terminal #1 of 4602_1 implements transmission of the first frequency (band) to Base Station #1 of 4601_1.

[0974] Figure 46B Base Station #2 of 4601_2 receives frame T1 of 5001_1 sent by Terminal #1 of 4602_1. Subsequently, for example, in the time interval from time t2 to time t3, Base Station #2 of 4601_2 sends frame B1 of 5011_1.

[0975] Figure 53 Shows Figure 46B An example of the structure of frame B1 of 5011_1 sent by Base Station #2 of 4601_2 using the second frequency (band).

[0976] For example, assume that inFigure 46B In the frame B1 of 5011_1 sent by base station #2 of 4601_2, "information related to the allocation of frames containing data symbols of the first frequency" 5301 is included.

[0977] Assume that in the "information related to the allocation of frames containing data symbols of the first frequency" 5301, at least Figure 46B information on the time slot of the data symbol sent by base station #1 of 4601_1 to terminal #1 of 4602_1 is included.

[0978] For example, as Figure 17 shown, Figure 50A The frame 1003 containing data symbols is composed of the modulation signal (time slot) 1701_1 sent to the first terminal, the modulation signal (time slot) 1701_2 sent to the second terminal, the modulation signal (time slot) 1701_3 sent to the third terminal, and the modulation signal (time slot) 1701_4 sent to the fourth terminal. Figure 46B Base station #1 of 4601_1, for example, uses Figure 17 the modulation signal (time slot) 1701_1 sent to the first terminal to send a frame containing data symbols to terminal #1 of 4602_1.

[0979] In this case, Figure 53 in the "information related to the allocation of frames containing data symbols of the first frequency" 5301, "information indicating that a frame containing data symbols was sent using the modulation signal (...

Claims

1. A wireless communication device that communicates with a first transceiver point (TRP) and a second transceiver point, comprising: a circuit that selects a beam among a plurality of beams used by the first TRP; and a transmitter that transmits information related to the selected beam to the second TRP.

2. The wireless communication device according to claim 1, wherein information related to the plurality of beams is transmitted from the second TRP.

3. The wireless communication device according to claim 1, wherein the selected beam is determined based on a reference signal transmitted from the first TRP.

4. The wireless communication device according to claim 1, wherein in the case of communication failure with the first TRP, information related to the selected beam is transmitted.

5. The wireless communication device according to claim 1, wherein information related to the selected beam is transmitted by using discrete Fourier transform spread orthogonal frequency division multiplexing (DFT-SOFDM).

6. A communication method for communicating with a first transceiver point (TRP) and a second transceiver point, comprising: selecting a beam among a plurality of beams used by the first TRP; and transmitting information related to the selected beam to the second TRP.

7. The communication method according to claim 6, wherein information related to the plurality of beams is transmitted from the second TRP.

8. The communication method according to claim 6, wherein the selected beam is determined based on a reference signal transmitted from the first TRP.

9. The communication method according to claim 6, wherein in the case of communication failure with the first TRP, information related to the selected beam is transmitted.

10. The communication method according to claim 6, wherein information related to the selected beam is transmitted by using discrete Fourier transform spread orthogonal frequency division multiplexing (DFT-SOFDM).

11. An integrated circuit that communicates with a first transceiver point (TRP) and a second transceiver point, comprising: a selection circuit that controls to select a beam among a plurality of beams used by the first TRP; and a transmission circuit that controls to transmit information related to the selected beam to the second TRP.

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