Terminal, communication method, and integrated circuit

Abstract

The invention provides a terminal, a communication method and an integrated circuit. The terminal includes: a circuit generating a first signal and a second signal in operation; and a transmitter that, in operation, transmits a first signal from the first planar antenna and a second signal from the second planar antenna.

Description

[0001] This application is a divisional application of the invention patent application with national application number 202180043525.1, international application date June 29, 2021, entry into the Chinese national phase date December 12, 2022, and invention name “Wireless Communication System, Wireless Communication Device and Wireless Communication Method”. Technical Field

[0002] The present disclosure relates to a terminal, a communication method, and an integrated circuit. Background Art

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

[0004] As a communication method for extending the communication distance, there is a method described in Patent Document 1. Figure 88 An example of the communication state of the wireless communication device described in Patent Document 1 is shown.

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

[0006] Through this process, wireless communication device 001 determines the "transmit beamforming and / or receive beamforming" method, and wireless communication device 051 also determines the "transmit beamforming and / or receive beamforming" method. This increases the communication distance between wireless communication device 001 and wireless communication device 051. However, in an environment with multiple wireless communication devices, improving the overall data transmission efficiency of the communication system composed of these devices remains a challenge.

[0007] Prior art literature

[0008] Patent Literature

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

[0010] Non-limiting embodiments of the present disclosure contribute to providing a terminal, a communication method, and an integrated circuit that improve data transmission speed in the presence of multiple wireless communication devices.

[0011] A wireless communication system according to one embodiment of the present invention includes: a first wireless communication device that transmits a plurality of first reference signals with controlled directivity in an orthogonal frequency division multiple access (OFDMA) manner during a first period; and a second wireless communication device that transmits a plurality of second reference signals with controlled directivity to the first wireless communication device during a second period, the plurality of second reference signals including information about the directivity corresponding to at least one of the first reference signals received from the first wireless communication device.

[0012] A wireless communication device according to one embodiment of the present invention includes: a receiving processing unit that receives a plurality of first reference signals whose directivities are controlled by other wireless communication devices using orthogonal frequency division multiple access (OFDMA) during a first period; and a transmitting processing unit that transmits a plurality of second reference signals whose directivities are controlled to the other wireless communication devices during a second period, the plurality of second reference signals including information about the directivity corresponding to a particular one of the first reference signals.

[0013] A wireless communication device according to one embodiment of the present disclosure includes: a transmission processing unit that transmits a plurality of first reference signals whose directivity has been controlled using orthogonal frequency division multiple access (OFDMA) during a first period; and a reception processing unit that receives at least one second reference signal from a plurality of second reference signals during a second period, wherein the plurality of second reference signals include information about the directivity corresponding to a particular first reference signal among the first reference signals, and the directivity of the plurality of second reference signals is controlled by other wireless communication devices that have received the first reference signal.

[0014] In a wireless communication method according to one embodiment of the present disclosure, a first wireless communication device transmits a plurality of first reference signals whose directivity has been controlled using orthogonal frequency division multiple access (OFDMA) during a first period, and a second wireless communication device transmits a plurality of second reference signals whose directivity has been controlled to the first wireless communication device during a second period, the plurality of second reference signals including information about the directivity corresponding to a particular one of the first reference signals received from the first wireless communication device.

[0015] These general or specific aspects may be implemented by a system, an apparatus, a method, an integrated circuit, a computer program, or a recording medium, or by any combination of systems, apparatuses, methods, integrated circuits, computer programs, and recording media.

[0016] According to non-limiting embodiments of the present disclosure, data transmission speed is improved when multiple wireless communication devices exist.

[0017] Further advantages and effects of one embodiment of the present disclosure will be apparent from the description and accompanying drawings. These advantages and / or effects are provided by several embodiments, and the features described in the description and accompanying drawings, but not all of them need to be provided in order to obtain one or more of the same features. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1A This is a diagram showing an example of the configuration of a communication device in Embodiment 1.

[0019] Figure 1B is a communication device in accordance with the first embodiment. Figure 1A Figures showing different structural examples.

[0020] Figure 1C is a communication device in accordance with the first embodiment. Figure 1A 、 Figure 1B Figures showing different structural examples.

[0021] Figure 2 This is a diagram showing a configuration example of the i-th sending unit.

[0022] Figure 3 Yes Figure 1A 、 Figure 1B 、 Figure 1C A diagram showing an example of the structure of the transmitting panel antenna i in .

[0023] Figure 4 Yes Figure 1A 、 Figure 1B 、 Figure 1C A diagram showing an example of the structure of the receiving panel antenna i.

[0024] Figure 5 This is a diagram showing a configuration example of a transmission device when the OFDM (Orthogonal Frequency Division Multiplexing) method is used.

[0025] Figure 6 This is a diagram showing a configuration example of a receiving device when the OFDM method is used.

[0026] Figure 7 This diagram shows a configuration example of a receiving apparatus when a single-carrier method based on DFT (Discrete Fourier Transform) is used.

[0027] Figure 8 This is a diagram showing a configuration example of a receiving apparatus when a single-carrier method based on the time domain is used.

[0028] Figure 9This is a diagram showing an example of a communication state in the first embodiment.

[0029] Figure 10 Yes Figure 9 Figure 2 is a diagram of an example of a modulated signal sent by base station #1 in FIG.

[0030] Figure 11 Yes means having Figure 1A 、 Figure 1B 、 Figure 1C structure Figure 9 Base station #1 sends Figure 10 Figure 2 is an example of sector scanning using a reference signal.

[0031] Figure 12 Yes Figure 11 Frequency Figure 1 shows a configuration example of "sector scanning reference signal using transmitting panel antenna i".

[0032] Figure 13 1 is a diagram showing an example of operation in the time period from time t1 to time t2 which is a terminal response period.

[0033] Figure 14 Is to express Figure 13 The diagram shows an example of the correlation between terminal occupancy during the transmission period of the "sector scanning reference signal" for the terminal.

[0034] Figure 15A 1 is a diagram showing an example of the structure of the "sector scanning reference signal" of terminal #i.

[0035] Figure 15B Yes Figure 15A A diagram showing a structural example of the "reference signal for sector scanning in the transmitting panel antenna xi of terminal #i".

[0036] Figure 16A It means existing in Figure 10 A diagram showing an example of the structure of a feedback signal transmitted by base station #1 in the time interval from t2 to t3 in FIG.

[0037] Figure 16B It means for Figure 16A The diagram shows an example of feedback signal distribution, specifically feedback signal distribution.

[0038] Figure 17A It means existing in Figure 10 A diagram showing an example of the structure of a frame including data symbols transmitted by base station #1 in the time interval from t4 to t5.

[0039] Figure 17B It means for Figure 17AThe diagram shows an example of allocation of specific modulation signals (time slots) in a frame containing data codewords.

[0040] Figure 18 This is a diagram showing an example of a situation in which base station #1 communicates with "terminal #1 to terminal #6."

[0041] Figure 19 Yes Figure 18 A diagram showing examples of the subsequent transmission status of modulated signals by base station #1 and the transmission status of modulated signals by terminals such as "terminal #1 to terminal #6".

[0042] Figure 20A This is a diagram showing an example of the structure of a "frame including data symbols" transmitted by terminal #1.

[0043] Figure 20B This is a diagram showing a structural example of a "frame including data symbols" transmitted by terminal #2.

[0044] Figure 20C This is a diagram showing a structural example of a "frame including data symbols" transmitted by terminal #3.

[0045] Figure 20D This is a diagram showing a structural example of a "frame including data symbols" transmitted by terminal #4.

[0046] Figure 20E This is a diagram showing a structural example of a "frame including data symbols" transmitted by terminal #5.

[0047] Figure 20F This is a diagram showing a structural example of a "frame including data symbols" transmitted by terminal #6.

[0048] Figure 21A It means different from Figure 14 of, and Figure 13 The diagram shows an example of the correlation between terminal occupancy during the transmission period of the "sector scanning reference signal" for the terminal.

[0049] Figure 21B It means different from Figure 14 of, and Figure 13 The diagram shows an example of the correlation between terminal occupancy during the transmission period of the "sector scanning reference signal" for the terminal.

[0050] Figure 22A This is a diagram showing an example of the "sector scanning reference signal" of terminal #3.

[0051] Figure 22B This is a diagram showing another example of the "sector scanning reference signal" of terminal #3.

[0052] Figure 231 is a diagram showing an example of operation in the time period from time t1 to time t2 which is a terminal response period.

[0053] Figure 24 Is to express Figure 23 The diagram shows an example of the correlation between terminal occupancy during the transmission period of the "sector scanning reference signal" for the terminal.

[0054] Figure 25 This is a diagram showing a structural example of a "frame including data symbols" transmitted by terminals such as terminal #1 to terminal #6.

[0055] Figure 26 It means different from Figure 24 of, and Figure 23 The diagram shows an example of the correlation between terminal occupancy during the transmission period of the "sector scanning reference signal" for the terminal.

[0056] Figure 27 Yes Figure 9 Figure 2 is a diagram of an example of a modulated signal sent by base station #1 in FIG.

[0057] Figure 28A It means existing in Figure 27 A diagram showing a first example of the structure of the feedback signal group transmitted by base station #1 in the time interval from t2 to t3 in FIG.

[0058] Figure 28B It means existing in Figure 27 A diagram showing a first example of the structure of the feedback signal group transmitted by base station #1 in the time interval from t2 to t3 in FIG.

[0059] Figure 29A It means existing in Figure 27 A diagram showing a first example of the structure of a frame group including data symbols transmitted by base station #1 in the time interval from t4 to t5.

[0060] Figure 29B It means existing in Figure 27 A diagram showing a first example of the structure of a frame group including data symbols transmitted by base station #1 in the time interval from t4 to t5.

[0061] Figure 30A It means existing in Figure 27 A diagram showing a second example of the structure of the feedback signal group transmitted by base station #1 in the time interval from t2 to t3 in FIG.

[0062] Figure 30B It means existing in Figure 27 A diagram showing a second example of the structure of the feedback signal group transmitted by base station #1 in the time interval from t2 to t3 in FIG.

[0063] Figure 31A It means existing in Figure 27 A diagram showing a second example of the structure of a frame group including data symbols transmitted by base station #1 in the time interval from t4 to t5.

[0064] Figure 31B It means existing in Figure 27 A diagram showing a second example of the structure of a frame group including data symbols transmitted by base station #1 in the time interval from t4 to t5.

[0065] Figure 32A It means existing in Figure 27 A diagram showing a third example of the structure of the feedback signal group transmitted by base station #1 in the time interval from t2 to t3 in FIG.

[0066] Figure 32B It means existing in Figure 27 A diagram showing a third example of the structure of the feedback signal group transmitted by base station #1 in the time interval from t2 to t3 in FIG.

[0067] Figure 33A It means existing in Figure 27 A diagram showing a third example of the structure of a frame group including data symbols transmitted by base station #1 in the time interval from t4 to t5.

[0068] Figure 33B It means existing in Figure 27 A diagram showing a third example of the structure of a frame group including data symbols transmitted by base station #1 in the time interval from t4 to t5.

[0069] Figure 34A It means existing in Figure 27 A diagram showing a fourth example of the structure of the feedback signal group transmitted by base station #1 in the time interval from t2 to t3 in FIG.

[0070] Figure 34B It means existing in Figure 27 A diagram showing a fourth example of the structure of the feedback signal group transmitted by base station #1 in the time interval from t2 to t3 in FIG.

[0071] Figure 35A It means existing in Figure 27 A diagram showing a fourth example of the structure of a frame group including data symbols transmitted by base station #1 in the time interval from t4 to t5.

[0072] Figure 35B It means existing in Figure 27 A diagram showing a fourth example of the structure of a frame group including data symbols transmitted by base station #1 in the time interval from t4 to t5.

[0073] Figure 36 It means existing in Figure 27A diagram showing a fifth example of the structure of the feedback signal group transmitted by base station #1 in the time interval from t2 to t3 in FIG.

[0074] Figure 37 It means existing in Figure 27 A diagram showing a fifth example of the structure of a frame group including data symbols transmitted by base station #1 in the time interval from t4 to t5.

[0075] Figure 38 It means existing in Figure 27 A diagram showing a sixth example of the structure of the feedback signal group transmitted by base station #1 in the time interval from t2 to t3 in FIG.

[0076] Figure 39 It means existing in Figure 27 A diagram showing a sixth example of the structure of a frame group including data symbols transmitted by base station #1 in the time interval from t4 to t5.

[0077] Figure 40 It means existing in Figure 27 A diagram showing a seventh example of the structure of the feedback signal group transmitted by base station #1 in the time interval from t2 to t3 in FIG.

[0078] Figure 41 It means existing in Figure 27 A diagram showing a seventh example of the structure of a frame group including data symbols transmitted by base station #1 in the time interval from t4 to t5.

[0079] Figure 42 It means in Figure 9 , which is a diagram showing an example of a situation in which base station #1 communicates with “terminals such as terminal #1”.

[0080] Figure 43 Yes Figure 42 A diagram showing examples of the subsequent transmission status of the modulated signal of base station #1 and the transmission status of the modulated signal of "terminals such as terminal #1".

[0081] Figure 44A This is a diagram showing a first example of the structure of a "frame group including data symbols".

[0082] Figure 44B This is a diagram showing a first example of the structure of a "frame group including data symbols".

[0083] Figure 45A This is a diagram showing a second example of the structure of a "frame group including data symbols".

[0084] Figure 45B This is a diagram showing a second example of the structure of a "frame group including data symbols".

[0085] Figure 46AThis is a diagram showing a third example of the structure of a "frame group including data symbols".

[0086] Figure 46B This is a diagram showing a third example of the structure of a "frame group including data symbols".

[0087] Figure 47A This is a diagram showing the fourth example of the structure of a "frame group including data symbols".

[0088] Figure 47B This is a diagram showing the fourth example of the structure of a "frame group including data symbols".

[0089] Figure 48 This is a diagram showing the fifth example of the structure of a "frame group including data symbols".

[0090] Figure 49 This is a diagram showing the sixth example of the structure of a "frame group including data symbols".

[0091] Figure 50 This is a diagram showing the seventh example of the structure of a "frame group including data symbols".

[0092] Figure 51A This is a diagram showing the eighth example of the structure of a "frame group including data symbols".

[0093] Figure 51B This is a diagram showing the eighth example of the structure of a "frame group including data symbols".

[0094] Figure 52A This is a diagram showing the ninth example of the structure of a "frame group including data symbols".

[0095] Figure 52B This is a diagram showing the ninth example of the structure of a "frame group including data symbols".

[0096] Figure 53 This is a diagram showing the tenth example of the structure of a "frame group including data symbols".

[0097] Figure 54 This is a diagram showing an example of the structure of a sector scanning reference signal transmitted by a base station.

[0098] Figure 55 Yes Figure 54 Frequency FIG. 1 is a diagram showing a structural example of a “sector scanning reference signal”.

[0099] Figure 56 Yes Figure 14 A diagram showing an example of the structure of the "sector scanning reference signal" of terminal #i.

[0100] Figure 57 Yes Figure 24 A diagram showing an example of the structure of a reference signal for sector scanning.

[0101] Figure 58 1 is a diagram showing an example of operation in the time period from time t1 to time t2 which is a terminal response period.

[0102] Figure 59A Yes Figure 58 The diagram shows an example of the time and frequency structure of the "sector scanning reference signal" used by the terminal.

[0103] Figure 59B Is to express Figure 59A The diagram shows an example of the correlation between terminal occupancy in the "sector scanning reference signal" used by the terminal.

[0104] Figure 60A It means existing in Figure 10 A diagram showing an example of the structure of a feedback signal transmitted by base station #1 in the time interval from t2 to t3 in FIG.

[0105] Figure 60B It means for Figure 60A The diagram shows an example of feedback signal distribution, specifically feedback signal distribution.

[0106] Figure 61A It means existing in Figure 10 A diagram showing an example of the structure of a frame including data symbols transmitted by base station #1 in the time interval from t4 to t5.

[0107] Figure 61B It means for Figure 61A The diagram shows an example of allocation of specific modulation signals (time slots) in a frame containing data codewords.

[0108] Figure 62A This is a diagram showing an example of the structure of a "frame including data symbols" transmitted by terminal #1.

[0109] Figure 62B This is a diagram showing a structural example of a "frame including data symbols" transmitted by terminal #2.

[0110] Figure 62C This is a diagram showing a structural example of a "frame including data symbols" transmitted by terminal #3.

[0111] Figure 62D This is a diagram showing a structural example of a "frame including data symbols" transmitted by terminal #4.

[0112] Figure 62E This is a diagram showing a structural example of a "frame including data symbols" transmitted by terminal #5.

[0113] Figure 62F This is a diagram showing a structural example of a "frame including data symbols" transmitted by terminal #6.

[0114] Figure 63A It means different from Figure 59B of, and Figure 59A The diagram shows an example of the correlation between terminal occupancy in the "sector scanning reference signal" used by the terminal.

[0115] Figure 63B It means different from Figure 59B of, and Figure 59A The diagram shows an example of the correlation between terminal occupancy in the "sector scanning reference signal" used by the terminal.

[0116] Figure 64A It means existing in Figure 27 FIG. 8 is a diagram showing an eighth example of the structure of the feedback signal group transmitted by base station #1 in the time interval from t2 to t3 in FIG.

[0117] Figure 64B It means existing in Figure 27 FIG. 8 is a diagram showing an eighth example of the structure of the feedback signal group transmitted by base station #1 in the time interval from t2 to t3 in FIG.

[0118] Figure 65A It means existing in Figure 27 FIG. 8 is a diagram showing an eighth example of the structure of a frame group including data symbols transmitted by base station #1 in the time interval from t4 to t5.

[0119] Figure 65B It means existing in Figure 27 FIG. 8 is a diagram showing an eighth example of the structure of a frame group including data symbols transmitted by base station #1 in the time interval from t4 to t5.

[0120] Figure 66A It means existing in Figure 27 A diagram showing a ninth example of the structure of the feedback signal group transmitted by base station #1 in the time interval from t2 to t3 in FIG.

[0121] Figure 66B It means existing in Figure 27 A diagram showing a ninth example of the structure of the feedback signal group transmitted by base station #1 in the time interval from t2 to t3 in FIG.

[0122] Figure 67A It means existing in Figure 27 A diagram showing a ninth example of the structure of a frame group including data symbols transmitted by base station #1 in the time interval from t4 to t5.

[0123] Figure 67B It means existing in Figure 27A diagram showing a ninth example of the structure of a frame group including data symbols transmitted by base station #1 in the time interval from t4 to t5.

[0124] Figure 68 It means existing in Figure 27 A diagram showing a tenth example of the structure of the feedback signal group transmitted by base station #1 in the time interval from t2 to t3 in FIG.

[0125] Figure 69 It means existing in Figure 27 A diagram showing a tenth example of the structure of a frame group including data symbols transmitted by base station #1 in the time interval from t4 to t5.

[0126] Figure 70A This is a diagram showing the eleventh example of the structure of a "frame group including data symbols".

[0127] Figure 70B This is a diagram showing the eleventh example of the structure of a "frame group including data symbols".

[0128] Figure 71A This is a diagram showing the twelfth example of the structure of a "frame group including data symbols".

[0129] Figure 71B This is a diagram showing the twelfth example of the structure of a "frame group including data symbols".

[0130] Figure 72 This is a diagram showing the 13th example of the structure of a "frame group including data symbols".

[0131] Figure 73 Yes means having Figure 1A 、 Figure 1B 、 Figure 1C structure Figure 9 Base station #1 sends Figure 10 Figure 2 is an example of sector scanning using a reference signal.

[0132] Figure 74 Yes Figure 73 A diagram showing a structural example of a "reference signal for sector scanning in a transmitting panel antenna X at frequency $X".

[0133] Figure 75 Yes Figure 74 A diagram showing a structural example of a "reference signal for sector scanning in a transmitting panel antenna X at frequency $X_i".

[0134] Figure 76 This is a diagram showing an example of the relationship between a base station and a terminal.

[0135] Figure 77A Is to express Figure 13The diagram shows an example of the correlation between terminal occupancy during the transmission period of the "sector scanning reference signal" for the terminal.

[0136] Figure 77B Is to express Figure 13 The diagram shows an example of the correlation between terminal occupancy during the transmission period of the "sector scanning reference signal" for the terminal.

[0137] Figure 78A It means existing in Figure 10 A diagram showing an example of the structure of a feedback signal transmitted by base station #1 in the time interval from t2 to t3 in FIG.

[0138] Figure 78B Yes Figure 78A A diagram showing a configuration example of a transmission interval of a feedback signal in a transmission panel antenna X at a frequency $X.

[0139] Figure 78C It means for Figure 78A 、 Figure 78B The diagram shows an example of feedback signal distribution, specifically feedback signal distribution.

[0140] Figure 78D It means for Figure 78A 、 Figure 78B The diagram shows an example of feedback signal distribution, specifically feedback signal distribution.

[0141] Figure 79A It means existing in Figure 10 A diagram showing an example of the structure of a frame including data symbols transmitted by base station #1 in the time interval from t4 to t5.

[0142] Figure 79B Yes Figure 79A A diagram showing a structural example of a transmission interval of a modulated signal (time slot) in a transmission panel antenna X at a frequency $X.

[0143] Figure 79C It means for Figure 79A 、 Figure 79B The diagram shows an example of allocation of specific modulation signals (time slots) in a frame containing data codewords.

[0144] Figure 79D It means for Figure 79A 、 Figure 79B The diagram shows an example of allocation of specific modulation signals (time slots) in a frame containing data codewords.

[0145] Figure 80A This is a diagram showing an example of the structure of a "frame including data symbols" transmitted by terminal #1.

[0146] Figure 80BThis is a diagram showing a structural example of a "frame including data symbols" transmitted by terminal #2.

[0147] Figure 80C This is a diagram showing a structural example of a "frame including data symbols" transmitted by terminal #3.

[0148] Figure 80D This is a diagram showing a structural example of a "frame including data symbols" transmitted by terminal #4.

[0149] Figure 80E This is a diagram showing a structural example of a "frame including data symbols" transmitted by terminal #5.

[0150] Figure 80F This is a diagram showing a structural example of a "frame including data symbols" transmitted by terminal #6.

[0151] Figure 81A It means different from Figure 77A of, and Figure 13 The diagram shows an example of the correlation between terminal occupancy during the transmission period of the "sector scanning reference signal" for the terminal.

[0152] Figure 81B It means different from Figure 77A of, and Figure 13 The diagram shows an example of the correlation between terminal occupancy during the transmission period of the "sector scanning reference signal" for the terminal.

[0153] Figure 82A Yes Figure 58 The diagram shows an example of the time and frequency structure of the "sector scanning reference signal" used by the terminal.

[0154] Figure 82B Is to express Figure 82A The diagram shows an example of the correlation between terminal occupancy in the "sector scanning reference signal" used by the terminal.

[0155] Figure 83A Yes Figure 58 The diagram shows an example of the time and frequency structure of the "sector scanning reference signal" used by the terminal.

[0156] Figure 83B Is to express Figure 83A The diagram shows an example of the correlation between terminal occupancy in the "sector scanning reference signal" used by the terminal.

[0157] Figure 84A It means existing in Figure 10 A diagram showing an example of the structure of a feedback signal transmitted by base station #1 in the time interval from t2 to t3 in FIG.

[0158] Figure 84B Yes Figure 84A A diagram showing a structural example of "a feedback signal from a transmitting panel antenna X at a frequency $X".

[0159] Figure 84C It means for Figure 84A 、 Figure 84B The diagram shows an example of feedback signal distribution, specifically feedback signal distribution.

[0160] Figure 84D It means for Figure 84A 、 Figure 84B The diagram shows an example of feedback signal distribution, specifically feedback signal distribution.

[0161] Figure 85A It means existing in Figure 10 A diagram showing an example of the structure of a frame including data symbols transmitted by base station #1 in the time interval from t4 to t5.

[0162] Figure 85B Yes Figure 85A A diagram showing a structural example of "a modulated signal (time slot) in a transmitting panel antenna X at a frequency $X".

[0163] Figure 85C It means for Figure 85A 、 Figure 85B The diagram shows an example of allocation of specific modulation signals (time slots) in a frame containing data codewords.

[0164] Figure 85D It means for Figure 85A 、 Figure 85B The diagram shows an example of allocation of specific modulation signals (time slots) in a frame containing data codewords.

[0165] Figure 86A This is a diagram showing an example of the structure of a "frame including data symbols" transmitted by terminal #1.

[0166] Figure 86B This is a diagram showing a structural example of a "frame including data symbols" transmitted by terminal #2.

[0167] Figure 86C This is a diagram showing a structural example of a "frame including data symbols" transmitted by terminal #3.

[0168] Figure 86D This is a diagram showing a structural example of a "frame including data symbols" transmitted by terminal #4.

[0169] Figure 86E This is a diagram showing a structural example of a "frame including data symbols" transmitted by terminal #5.

[0170] Figure 86FThis is a diagram showing a structural example of a "frame including data symbols" transmitted by terminal #6.

[0171] Figure 87A It means different from Figure 82B of, and Figure 58 The diagram shows an example of the correlation between terminal occupancy in the "sector scanning reference signal" used by the terminal.

[0172] Figure 87B It means different from Figure 82B of, and Figure 58 The diagram shows an example of the correlation between terminal occupancy in the "sector scanning reference signal" used by the terminal.

[0173] Figure 88 FIG. 1 is a diagram showing an example of a communication state of a conventional wireless communication device. DETAILED DESCRIPTION

[0174] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0175] (Implementation Method 1)

[0176] The communication system, communication device, and communication method according to the first embodiment will be described in detail.

[0177] Figure 1A An example of the configuration of communication devices such as a base station, an access point, a terminal, and a repeater in the first embodiment is shown.

[0178] Set as, Figure 1A The communication device includes N transmitting units, namely, "a first transmitting unit 102_1 to an Nth transmitting unit 102_N." Note that N is an integer greater than or equal to 1 or an integer greater than or equal to 2.

[0179] In addition, let Figure 1A The communication device includes M transmission panel antennas for transmission, namely, "transmission panel antenna 1 of 106_1 to transmission panel antenna M of 106_M." Note that M is an integer greater than or equal to 1 or an integer greater than or equal to 2.

[0180] Set as, Figure 1A The communication device includes n receiving units, namely, "a first receiving unit 155_1 to an n-th receiving unit 155_n." Note that n is an integer greater than or equal to 1 or an integer greater than or equal to 2.

[0181] Set as, Figure 1A The communication device includes m receiving panel antennas for reception, namely, "receiving panel antenna 1 of 151_1 to receiving panel antenna m of 151_m." Note that m is an integer greater than or equal to 1 or an integer greater than or equal to 2.

[0182] The i-th transmitter 102_i receives the control signal 100 and the i-th data 101_i as input, performs processing such as error correction coding and mapping based on the modulation scheme, and outputs the i-th modulated signal 103_i.

[0183] Furthermore, the i-th data 101_i may include data of more than one user. In this case, an error correction code, modulation method, and transmission method may be set for each user.

[0184] The first processing unit 104 receives as input an i-th modulated signal 103_i (i is an integer from 1 to N), the control signal 100, and the reference signal 199, and outputs a j-th transmit signal 105_j (j is an integer from 1 to M) based on the frame structure information included in the control signal 100. The i-th modulated signal 103_i may contain a modulation signal with no signal, and the j-th transmit signal 105_j may contain a transmit signal with no signal.

[0185] Next, the jth transmission signal 105_j is output as a radio wave from the transmission panel antenna j of 106_j. Furthermore, the transmission panel antenna j of 106_j can also receive the control signal 100 as input and perform beamforming to change the transmission directionality. Furthermore, the transmission panel antenna j of 106_j can also be switched based on the control signal 100 when transmitting a modulated signal to the communication partner. This will be described later.

[0186] 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 can also use the control signal 100 as input to perform beamforming to change the receiving directivity. This will be described later.

[0187] The second processing unit 153 receives the i-th received signal 152_i and the control signal 100 as input, performs frequency conversion and other processing, and outputs the j-th signal-processed signal 154_j. Note that the i-th received signal 152_i may contain a non-signal received signal, and the j-th signal-processed signal 154_j may contain a non-signal processed signal.

[0188] The jth receiving unit 155_j receives the jth signal-processed signal 154_j and the control signal 100 as input, performs demodulation and error correction decoding on the jth signal-processed signal 154_j based on the control signal 100, and outputs jth control data 156_j and jth data 157_j.

[0189] Furthermore, the j-th control data 156_j may include control data for one or more users, and the j-th data 157_j may include data for one or more users.

[0190] The third processing unit 158 ​​receives the j-th control data 156_j as input, generates and outputs the control signal 100 based on information obtained from the communication partner, etc.

[0191] also, Figure 1A The first processing unit 104 of the communication device may also perform processing for transmit beamforming (transmit directivity control), such as precoding processing. Furthermore, the second processing unit 153 may also perform processing for receive directivity control. As another example, the first processing unit 104 may also perform processing such that the first transmit signal 105_1 is output as the first modulated signal 103_1, the second transmit signal 105_2 is output as the second modulated signal 103_2, and the third transmit signal 105_3 is output as the third modulated signal 103_3. Alternatively, the first processing unit 104 may also perform processing such that the first transmit signal 105_1 is output as the second modulated signal 103_2. Alternatively, the second processing unit 153 may perform processing such that the first signal-processed signal 154_1 becomes the first received signal 152_1, the second signal-processed signal 154_2 becomes the second received signal 152_2, and the third signal-processed signal 154_3 becomes the third received signal 152_3. Alternatively, the second processing unit 153 may perform processing such that the second signal-processed signal 154_2 becomes the first received signal 152_1.

[0192] Figure 1A The structure in can also be added Figure 1A For example, the communication device may also include an interleaver for sorting code elements and / or data, a padding unit for padding, etc. Figure 1A (and Figure 1B 、 Figure 1C ) communication device can also perform transmission and / or reception corresponding to MIMO (Multiple Input Multiple Output) transmission using multiple antennas to transmit multiple modulated signals (multiple streams). In addition, it can also be, Figure 1A (and Figure 1B 、 Figure 1C ) uses a first frequency (frequency band) to perform transmission corresponding to multi-user MIMO transmission that sends a modulated signal to multiple terminals in at least a first time interval.

[0193] Figure 1B This is a communication device such as a base station, access point, terminal, repeater, etc. in this embodiment 1. Figure 1A Different structural examples. Figure 1B In the Figure 1A The same reference numerals are assigned to parts that perform the same operations, and detailed descriptions thereof are omitted.

[0194] Figure 1B The characteristic feature of the 105_x transmission scheme is that the number of transmitting units is equal to the number of transmitting panel antennas. In this case, the first processing unit 104 may also perform processing for transmit beamforming (transmit directivity control), such as precoding. Furthermore, the first processing unit 104 may output the xth transmit signal 105_x as the yth modulated signal 103_y. Furthermore, x is an integer greater than or equal to 1 and less than or equal to M, and y is an integer greater than or equal to 1 and less than or equal to M.

[0195] Furthermore, the number of receiving units is assumed to be the same as the number of receiving panel antennas. In this case, the second processing unit 153 may also perform processing for receiving directivity control. Alternatively, the second processing unit 153 may output the xth processed signal 154_x as the yth received signal 152_y. Furthermore, x is an integer greater than or equal to 1 and less than or equal to m, and y is an integer greater than or equal to 1 and less than or equal to m.

[0196] Figure 1C This is a communication device such as a base station, access point, terminal, repeater, etc. in this embodiment 1. Figure 1A 、 Figure 1B Different structural examples. Figure 1C In the Figure 1A The same reference numerals are assigned to parts that perform the same operations, and detailed descriptions thereof are omitted.

[0197] Figure 1C The characteristic point of 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.

[0198] in addition, Figure 1A 、 Figure 1B 、 Figure 1C These are examples of the configuration of communication devices such as base stations, access points, terminals, and repeaters, and the configuration method of the communication device is not limited to the above examples.

[0199] Figure 2 The configuration example of the i-th transmitting unit 102_i is shown. In addition, i is set to "an integer greater than or equal to 1 and less than or equal to N" or "an integer greater than or equal to 1 and less than or equal to M".

[0200] Data symbol generator 202 receives data 201 and control signal 200 as input, performs error correction coding, mapping, and signal processing for transmission based on information such as the error correction coding method, modulation scheme, transmission method, and frame structure method contained in control signal 200, and outputs modulated signal 203 representing the data symbols. Data 201 corresponds to i-th data 101_i, and control signal 200 corresponds to control signal 100. Therefore, data 201 may include data for more than one user.

[0201] Sector scan reference signal generator 204 receives control signal 200 as input and generates and outputs sector scan reference signal 205 based on the frame structure information included in control signal 200. The specific configuration and transmission methods of sector scan reference signal 205 will be described in detail later.

[0202] Another signal generating unit 206 receives the control signal 200 as input, generates and outputs another signal 207 based on the control signal.

[0203] Processing unit 251 receives as input the modulated signal 203 of the data symbol, the sector scanning reference signal 205, other signals 207, and the control signal 200. Based on the frame structure information included in the control signal 200, it generates and outputs a modulated signal 252 that conforms to the frame structure. Furthermore, modulated signal 252 that conforms to the frame structure corresponds to the i-th modulated signal 103_i. A specific example of the frame structure will be described in detail later.

[0204] Figure 3 Shown Figure 1A 、 Figure 1B 、 Figure 1C An example of the structure of the transmission panel antenna i of 106_i in FIG. In addition, i is set to "an integer greater than 1 and less than M". The distribution unit 302 receives 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 is equivalent to " Figure 1A 、 Figure 1B The i-th transmission signal 105_i" or " Figure 1C The i-th modulated signal 103_i".

[0205] Multiplication unit 304_1 receives first transmit signal 303_1 and control signal 300 as input. Based on control signal 300, it multiplies first transmit signal 303_1 by a multiplication coefficient, generating and outputting first transmit signal 305_1 multiplied by the coefficient. Next, antenna 306_1 outputs first transmit signal 305_1 multiplied by the coefficient as a radio wave. Control signal 300 corresponds to control signal 100.

[0206] Let's explain this in detail. Let's express first transmitted signal 303_1 as tx1(t). Here, t is time. Furthermore, if the multiplication coefficient is w1, then first transmitted signal 305_1 multiplied by the coefficient can be expressed as tx1(t) × w1. Furthermore, tx1(t) can be represented by a complex number, so it can also be a real number. Furthermore, w1 can be represented by a complex number, so it can also be a real number.

[0207] Multiplication unit 304_2 receives second transmission signal 303_2 and control signal 300 as input, multiplies second transmission signal 303_2 by a multiplication coefficient based on control signal 300, and generates and outputs second transmission signal 305_2 multiplied by the coefficient. Second transmission signal 305_2 multiplied by the coefficient is then output from antenna 306_2 as a radio wave.

[0208] Let's explain this in detail. Let's express second transmitted signal 303_2 as tx2(t). Here, t is time. Furthermore, if the multiplication coefficient is w2, then the second transmitted signal 305_2 multiplied by the coefficient can be expressed as tx2(t) × w2. Furthermore, tx2(t) can be represented by a complex number, so it can also be a real number. Furthermore, w2 can also be represented by a complex number, so it can also be a real number.

[0209] Multiplication unit 304_3 receives third transmission signal 303_3 and control signal 300 as input, multiplies third transmission signal 303_3 by a multiplication coefficient based on control signal 300, generates and outputs third transmission signal 305_3 multiplied by the coefficient. Third transmission signal 305_3 multiplied by the coefficient is then output from antenna 306_3 as a radio wave.

[0210] Let's explain this in detail. The third transmitted signal 303_3 is represented as tx3(t). Here, t is time. Furthermore, if the multiplication coefficient is w3, the third transmitted signal 305_3 multiplied by the coefficient can be represented as tx3(t) × w3. Furthermore, tx3(t) can be represented by a complex number, so it can also be a real number. Furthermore, w3 can also be represented by a complex number, so it can also be a real number.

[0211] Multiplication unit 304_4 receives fourth transmission signal 303_4 and control signal 300 as input, multiplies fourth transmission signal 303_4 by a multiplication coefficient based on control signal 300, and generates and outputs fourth transmission signal 305_4 multiplied by the coefficient. Then, antenna 306_4 outputs fourth transmission signal 305_4 multiplied by the coefficient as a radio wave.

[0212] Let's explain this in more detail. Let's express the fourth transmitted signal 303_4 as tx4(t). Here, t is time. Furthermore, if the multiplication coefficient is w4, the fourth transmitted signal 305_4 multiplied by the coefficient can be expressed as tx4(t) × w4. Furthermore, tx4(t) can be represented by a complex number, so it can also be a real number. Furthermore, w4 can also be represented by a complex number, so it can also be a real number.

[0213] Alternatively, the absolute values ​​of w1, w2, w3, and w4 may be equal. This is equivalent to a phase change. Of course, the absolute values ​​of w1, w2, w3, and w4 may not be equal.

[0214] The values ​​of w1, w2, w3, and w4 can be switched per frame, per slot, per mini-slot, per multiple symbols, or per symbol. The timing of switching the values ​​of w1, w2, w3, and w4 is not limited to the above examples.

[0215] In addition, Figure 3 Although an example in which the transmitting panel antenna is composed of four antennas (and four multiplication units) is described, the number of antennas is not limited to four, as long as it is composed of two or more antennas.

[0216] also, Figure 1A 、 Figure 1B 、 Figure 1C The transmitting panel antenna i of 106_i can also perform directivity control by changing the characteristics of the antenna itself. In this case, the transmitting panel antenna i of 106_i only needs to be composed of one or more antennas.

[0217] Figure 4 Shown Figure 1A 、 Figure 1B 、 Figure 1C An example of the structure of the receiving panel antenna i of 151_i in . In addition, i is set to "an integer greater than or equal to 1 and less than or equal to m".

[0218] Multiplication unit 403_1 receives first received signal 402_1 received by antenna 401_1 and control signal 400 as input, multiplies first received signal 402_1 by a multiplication coefficient based on control signal 400, and outputs first received signal 404_1 multiplied by the coefficient.

[0219] Let's explain this in detail. Let's express first received signal 402_1 as rx1(t). Here, t is time. Furthermore, if the multiplication coefficient is d1, then first received signal 404_1 multiplied by the coefficient can be expressed as rx1(t) × d1. Furthermore, since rx1(t) can be represented by a complex number, it can also be a real number. Furthermore, since d1 can be represented by a complex number, it can also be a real number.

[0220] Multiplication unit 403_2 receives second received signal 402_2 received by antenna 401_2 and control signal 400 as input, multiplies second received signal 402_2 by a multiplication coefficient based on control signal 400, and outputs second received signal 404_2 multiplied by the coefficient.

[0221] Let's explain this in more detail. Let's express second received signal 402_2 as rx2(t). Here, t is time. Furthermore, if the multiplication coefficient is d2, then second received signal 404_2 multiplied by the coefficient can be expressed as rx2(t) × d2. Furthermore, since rx2(t) can be represented by a complex number, it can also be a real number. Furthermore, since d2 can also be represented by a complex number, it can also be a real number.

[0222] Multiplication unit 403_3 receives third received signal 402_3 received by antenna 401_3 and control signal 400 as input, multiplies third received signal 402_3 by a multiplication coefficient based on control signal 400, and outputs third received signal 404_3 multiplied by the coefficient.

[0223] Let's explain this in more detail. Third received signal 402_3 is represented as rx3(t). Here, t is time. Furthermore, if the multiplication coefficient is d3, then third received signal 404_3 multiplied by the coefficient can be represented as rx3(t) × d3. Furthermore, since rx3(t) can be represented by a complex number, it can also be a real number. Furthermore, since d3 can also be represented by a complex number, it can also be a real number.

[0224] Multiplication unit 403_4 receives fourth received signal 402_4 received by antenna 401_4 and control signal 400 as input, multiplies fourth received signal 402_4 by a multiplication coefficient based on control signal 400, and outputs fourth received signal 404_4 multiplied by the coefficient.

[0225] Let's explain this in more detail. Let's express fourth received signal 402_4 as rx4(t). Here, t is time. Furthermore, if the multiplication coefficient is d4, then the fourth received signal 404_4 multiplied by the coefficient can be expressed as rx4(t) × d4. Furthermore, since rx4(t) can be represented by a complex number, it can also be a real number. Furthermore, since d4 can also be represented by a complex number, it can also be a real number.

[0226] Coupler / combiner 405 receives as input the first received signal 404_1 multiplied by the coefficient, the second received signal 404_2 multiplied by the coefficient, the third received signal 404_3 multiplied by the coefficient, and the fourth received signal 404_4 multiplied by the coefficient, combines these signals, and outputs a modulated signal 406. Modulated signal 406 is represented by rx1(t)×d1+rx2(t)×d2+rx3(t)×d3+rx4(t)×d4.

[0227] Furthermore, the control signal 400 corresponds to the control signal 100. Furthermore, the modulated signal 406 corresponds to the i-th received signal 152_i.

[0228] Alternatively, the absolute values ​​of d1, d2, d3, and d4 may be equal. This is equivalent to a phase change. Of course, the absolute values ​​of d1, d2, d3, and d4 may not be equal.

[0229] The values ​​of d1, d2, d3, and d4 can be switched per frame, per slot, per mini-slot, per multiple symbols, or per symbol. The timing of switching the values ​​of d1, d2, d3, and d4 is not limited to the above examples.

[0230] In addition, Figure 4 Although an example in which the receiving panel antenna is composed of four antennas (and four multiplication units) is described, the number of antennas is not limited to four, as long as it is composed of two or more antennas.

[0231] also, Figure 1A 、 Figure 1B 、 Figure 1C The receiving panel antenna i of 151_i can also perform directivity control by changing the characteristics of the antenna itself. In this case, the receiving panel antenna i of 151_i only needs to be composed of one or more antennas.

[0232] In this embodiment, Figure 1A 、 Figure 1B 、 Figure 1C For example, in the case of a communication device such as a base station or gNB (g NodeB), it is assumed that it corresponds to multi-carrier transmission such as OFDM (Orthogonal Frequency Division Multiplexing) transmission method. In addition, it can also be, Figure 1A 、 Figure 1B 、 Figure 1C The base station and gNB correspond to OFDMA (Orthogonal Frequency Division Multiple Access).

[0233] Figure 5 FIG. 2 shows an example of a configuration of a transmitting device when using OFDM. Figure 5 As shown, the transmitter is composed of a constellation mapper 501 , a serial / parallel converter 502 , and an IFFT (Inverse Fast Fourier Transform) 503 .

[0234] The constellation mapper 501 takes data as input, performs mapping based on a set modulation method, and outputs a modulated signal.

[0235] The serial / parallel converter 502 converts a serial signal into a parallel signal. If a parallel signal is already obtained, the serial / parallel converter 502 may not be required.

[0236] The IFFT 503 performs IFFT processing on the input signal and outputs a modulated signal based on the OFDM scheme. The IFFT 503 may also be an inverse Fourier transform unit that performs inverse Fourier transform.

[0237] In a transmitting device using the OFDM method, other processing units such as an error correction coding unit and an interleaver may also exist in the transmitting device. Figure 5 structure.

[0238] In this embodiment, Figure 1A 、 Figure 1B 、 Figure 1C For example, in the case of a communication device such as a base station or gNB (gNodeB), the communication device may support reception of multi-carrier transmission, such as the OFDM transmission method, or may support reception of a single-carrier method, such as a single-carrier method based on the DFT (Discrete Fourier Transform). An example of the structure of the receiving unit for the single-carrier method is described below.

[0239] Figure 6 FIG. 2 shows an example of a structure of a receiving device when using the OFDM method. Figure 6 As shown, in the receiving device when using the OFDM method, the receiving device is composed of a receiving FE processing unit (Rx (Receiver, receiver) FE (Front End) processing) 601, an FFT (Fast Fourier Transform, fast Fourier transform) 602, a parallel / serial conversion unit 603, and a demapper (Demapper) 604.

[0240] The reception FE processing unit (Rx FE processing) 601 performs reception front-end processing.

[0241] The FFT 602 performs FFT processing on the input signal.

[0242] The parallel / serial converter 603 converts the parallel signal into a serial signal. If a serial signal is already obtained, the parallel / serial converter 603 may not be required.

[0243] The demapper 604 performs demodulation processing based on the transmission method and modulation scheme.

[0244] In addition, the receiving device may also include other processing units such as a deinterleaver and an error correction code decoding unit. Figure 6 structure.

[0245] Figure 7 FIG. 2 shows an example of a structure of a receiving device when a single-carrier method based on DFT is used. Figure 7 As shown, the receiving device is composed of a receiving FE processing unit (Rx (Receiver) FE processing) 701, a CP removal unit (CP Removal) 702, an FFT (Fast Fourier Transform) 703, a tone demapping (Tone Demapping) 704, an FDE (Frequency Domain Equalization) 705, a DFT 706, and a demapper (Demapper) 707. Furthermore, other processing units may also be present in the receiving device.

[0246] Figure 8 FIG. 2 shows an example of a structure of a receiving device when a single carrier method based on the time domain is used. Figure 8As shown, the receiving device is composed of a receiving FE processing unit (Rx (Receiver) FE processing) 801, down-sampling and matched filtering (Down-sampling and match filtering) 802, TDE (Time Domain Equalization) 803, CP removal unit (CP Removal) 804, and demapper (Demapper) 805. In addition, other processing units may also exist in the receiving device.

[0247] In the above description, examples of the configuration of a single-carrier reception method and a reception apparatus have been described, but examples of the single-carrier reception method and the reception apparatus are not limited thereto. For example, examples of single-carrier methods include "DFT (Discrete Fourier Transform)-Spread OFDM (Orthogonal Frequency Division Multiplexing)" (DFT-S OFDM), "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)", "Gurdinterval DFT-Spread OFDM", time-domain implementation single-carrier method (for example, SC (Single Carrier)-QAM), etc.

[0248] Figure 9 An example of the communication state in this embodiment 1 is shown. Figure 9 As shown, consider a case where base station #1 at 901_1 communicates with terminal #1 at 902_1, terminal #2 at 902_2, terminal #3 at 902_3, terminal #4 at 902_4, terminal #5 at 902_5, and terminal #6 at 902_6. However, the relationship between base stations and terminals is not limited to this example; for example, a base station may communicate with more than one terminal.

[0249] In addition, the following describes an example in which a base station transmits a modulated signal to a terminal using the OFDMA scheme.

[0250] Figure 10 Shown Figure 9 An example of a modulated signal 1000 transmitted by base station #1 of 901_1. Figure 10 In FIG. 1 , the horizontal axis represents time and the vertical axis represents frequency. In the time interval from time t0 to time t1, a sector sweep reference signal 1001 exists. The sector sweep reference signal 1001 will be described later.

[0251] The time interval from time t1 to time t2 is the terminal response interval. In addition, the terminal response will be described later.

[0252] In the time interval from time t2 to time t3, there is a feedback signal 1002. In addition, the feedback signal 1002 will be described later.

[0253] In the time interval from time t4 to time t5, there is a frame 1003 including data symbols. Frame 1003 including data symbols will be described later.

[0254] exist Figure 10 In the present invention, although it is referred to as "sector scanning reference signal 1001," the name is not limited to this and may also be referred to as "reference signal," "reference symbol," "training signal," "training symbol," "reference signal," "reference symbol," etc. Furthermore, although it is referred to as "feedback signal 1002," the name is not limited to this and may also be referred to as "feedback symbol," "signal sent to the terminal," "symbol sent to the terminal," "control signal," "control symbol," etc. Furthermore, although it is referred to as "frame containing data symbols 1003," the name is not limited to this and may also be referred to as "frame containing slots, mini-slots, cells, etc."

[0255] Figure 11 For example, it is shown that Figure 1A 、 Figure 1B 、 Figure 1C structure Figure 9 The 901_1 base station #1 sends Figure 10 An example of a sector scan reference signal 1001. Figure 11 In , the horizontal axis is time and the vertical axis is frequency. Figure 11 In the example, it is assumed that the base station #1 of 901_1 sends a modulated signal based on OFDMA, such as Figure 11 As shown, divided into frequency bands frequency band frequency band In addition, K is an integer greater than or equal to 1 or an integer greater than or equal to 2. In addition, for example, when OFDM(A) is used, one frequency band may include one or more (sub)carriers or two or more (sub)carriers. This point may also be similar in other figures and other embodiments.

[0256] And, for example, in the frequency band In the first time interval, there is a frequency The sector scanning reference signal 1101_11 in the transmitting panel antenna 1 is used, and there is a frequency in the second time interval. Using the sector scanning reference signal 1101_12 in the transmitting panel antenna 2, ..., there is a frequency in the Mth time interval. The reference signal 1101_1M is used for sector scanning in the transmitting panel antenna M.

[0257] Therefore, in the frequency band In the first time interval, there is a frequency The sector scanning reference signal 1101_i1 in the transmission panel antenna 1 is used, and the frequency exists in the second time interval. The sector scanning reference signal 1101_i2, ..., in the transmitting panel antenna 2 exists a frequency in the Mth time interval. The sector scanning reference signal 1101_iM is transmitted in the panel antenna M. Here, i is an integer greater than or equal to 1 and less than or equal to K.

[0258] In addition, the frequency The reference signal 1101_ij used to scan the sector of the transmitting panel antenna j will be Figure 1A 、 Figure 1B 、 Figure 1C The transmission panel antenna j of the base station #1 of the configuration 901_1 transmits. In this case, j is an integer greater than or equal to 1 and less than or equal to M.

[0259] “ Figure 11 A characteristic of the present invention is that, in the i-th time interval, a sector scanning reference signal is transmitted from the same transmitting panel antenna regardless of the frequency band. In this case, in the first time band, the same beamforming parameters are used regardless of the frequency band. Beamforming will be described later.

[0260] Figure 12 Shown Figure 11 Frequency An example of a structure in which a reference signal 1101_pi is used to scan a sector of a transmitting panel antenna i. Figure 12 In the example, the horizontal axis represents time. In addition, P is an integer greater than or equal to 1 and less than or equal to K, and i is an integer greater than or equal to 1 and less than or equal to M.

[0261] For example, let,have Figure 1A 、 Figure 1B 、 Figure 1C The base station #1 of the structure 901_1 has Figure 3 The structure serves as the transmitting panel antenna i of 106_i.

[0262] Frequency The following description will be given using a reference signal 1201_1″ using the first parameter transmitted from panel antenna i.

[0263] Send at base station #1 of 901_1 Figure 12 The frequency shown When using the reference signal 1201_1 using the first parameter in the transmission panel antenna i, the 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,1). If the "frequency Assuming the first transmission signal 303_1 in the reference signal 1201_1″ using the first parameter at the transmission panel antenna i is tx1ref1(t), the multiplication unit 304_1 obtains tx1ref1(t)×w1(i,1). Next, the base station #1 of 901_1 obtains Figure 3 Antenna 306_1 transmits tx1ref1(t)×w1(i,1). In addition, t is time.

[0264] Send at base station #1 of 901_1 Figure 12 The frequency shown When using the reference signal 1201_1 using the first parameter in the transmission panel antenna i, the base station #1 of 901_1 sets the multiplication coefficient of the multiplication unit 304_2 in the transmission panel antenna i of 106_i to w2(i,1). If the "frequency If the second transmission signal 303_2 in the reference signal 1201_1" using the first parameter at the transmission panel antenna i is tx2ref1(t), the multiplication unit 304_2 obtains tx2ref1(t)×w2(i,1). Then, the base station #1 of 901_1 receives Figure 3 Antenna 306_2 transmits tx2ref1(t)×w2(i,1).

[0265] Send at base station #1 of 901_1 Figure 12 The frequency shown When using the reference signal 1201_1 using the first parameter in the transmission panel antenna i, the 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 "frequency If the third transmission signal 303_3 in the reference signal 1201_1″ using the first parameter at the transmission panel antenna i is set to tx3ref1(t), the multiplication unit 304_3 will obtain tx3ref1(t)×w3(i,1). Then, the base station #1 of 901_1 receives Figure 3 Antenna 306_3 transmits tx3ref1(t)×w3(i,1).

[0266] Send at base station #1 of 901_1 Figure 12 The frequency shown When using the reference signal 1201_1 using the first parameter in the transmission panel antenna i, the 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 "frequency The fourth transmission signal 303_4 in the reference signal 1201_1″ using the first parameter at the transmission panel antenna i is set as tx4ref1(t), and the multiplication unit 304_4 obtains tx4ref1(t)×w4(i,1). Then, the base station #1 of 901_1 receives Figure 3 Antenna 306_4 transmits tx4ref1(t)×w4(i,1).

[0267] Frequency The following description uses a reference signal 1201_j" using the jth parameter transmitted from panel antenna i.

[0268] Send at base station #1 of 901_1 Figure 12 The frequency shown When using the reference signal 1201_j" using the jth parameter in the transmission panel antenna i, the 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 "frequency Assuming the first transmission signal 303_1 in the reference signal 1201_j" using the jth parameter in the transmission panel antenna i is tx1refj(t), the multiplication unit 304_1 obtains tx1refj(t)×w1(i,j). Next, the base station #1 of 901_1 obtains Figure 3 Antenna 306_1 transmits tx1refj(t)×w1(i,j). In addition, t is time.

[0269] Send at base station #1 of 901_1 Figure 12 The frequency shown When using the reference signal 1201_j" using the jth parameter in the transmission panel antenna i, the base station #1 of 901_1 sets the multiplication coefficient of the multiplication unit 304_2 in the transmission panel antenna i of 106_i to w2(i,j). If the "frequency The second transmission signal 303_2 in the reference signal 1201_j" using the jth parameter in the transmission panel antenna i is set to tx2refj(t), and the multiplication unit 304_2 obtains tx2refj(t)×w2(i,j). Then, the base station #1 of 901_1 receives Figure 3 Antenna 306_2 transmits tx2refj(t)×w2(i,j).

[0270] Send at base station #1 of 901_1 Figure 12 The frequency shown When using the reference signal 1201_j" using the jth parameter in the transmission panel antenna i, the 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,j). The third transmission signal 303_3 in the reference signal 1201_j" using the jth parameter at the transmission panel antenna i is set as tx3refj(t), and the multiplication unit 304_3 obtains tx3refj(t)×w3(i,j). Then, the base station #1 of 901_1 receives Figure 3 Antenna 306_3 transmits tx3refj(t)×w3(i,j).

[0271] Send at base station #1 of 901_1 Figure 12 The frequency shown When using the reference signal 1201_j" using the jth parameter in the transmission panel antenna i, the 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,j). If the "frequency The fourth transmission signal 303_4 in the reference signal 1201_j" using the jth parameter in the transmission panel antenna i is set to tx4refj(t), and the multiplication unit 304_4 obtains tx4refj(t)×w4(i,j). Next, the base station #1 of 901_1 receives Figure 3 Antenna 306_4 transmits tx4refj(t)×w4(i,j).

[0272] in addition, Figure 12 In the equation ( ), j is an integer greater than or equal to 1 and less than or equal to 4. Figure 12 In the example, the number of parameter changes Z is set to Z=4, but the number of parameter changes Z is not limited to 4. The same implementation can be performed as long as Z is an integer greater than 1 or an integer greater than 2. In this case, j is an integer greater than 1 and less than Z.

[0273] Set as Figure 11 、 Figure 12 As shown, the base station #1 at 901_1 sends "frequency When the reference signal 1101_i is used to scan the sector of the transmitting panel antenna i, the frequency The reference signal 1201_j" using the jth parameter in the transmitting panel antenna i includes, for example, the following information.

[0274] The ID (identification number) of the transmitting panel antenna (here, for example, equivalent to i)

[0275] Identification number (ID) of the parameter used for beamforming (directivity control) (here, for example, equivalent to j)

[0276] When the terminal transmits a reference signal for sector scanning, the number of time divisions in which the reference signal for sector scanning can be transmitted (this will be described later).

[0277] In addition, the frequency The reference signal 1201_j" using the jth parameter in the transmitting panel antenna i may include the following information.

[0278] · With band and / or frequency Related information (may also include information on the number of frequency divisions) (This will be described later.)

[0279] Send "Frequency" via base station #1 of 901_1 By using the ID (identification) of the transmitting panel antenna and the identification number (ID) of the parameters used for beamforming (directional control), the terminal can know the received "ID (identification) of the transmitting panel antenna" and the identification number (ID) of the parameters used for beamforming (directional control), and the base station #1 and the terminal of 901_1 can perform appropriate control, thereby achieving the effect of improving the data reception quality.

[0280] Furthermore, the number of time divisions in which a terminal can transmit a sector sweep reference signal may be changed according to frames and / or time, etc. This can improve the data transmission efficiency of the communication system.

[0281] In addition, the base station #1 of 901_1 sends "with frequency band and / or frequency The terminal obtains the information and sends the "related information of the frequency that the base station wants to send" to the base station. As a result, the base station can perform appropriate control and improve the reception quality of data.

[0282] Next, explain Figure 10The terminal response interval in the time interval is the time interval from time t1 to time t2. In addition, in this embodiment 1, the case where the terminal uses OFDM and the frequencies (bands) used by the base station and the frequencies (bands) used by the terminal have some common frequencies (bands) is described as an example.

[0283] Figure 13 The example of the operation in the time interval from time t1 to time t2, which is the terminal response interval, is shown. Figure 13 In the example, the horizontal axis is time. Figure 9 Terminals 902_1, 902_2, 902_3, 902_4, 902_5, and 902_6 transmit sector scanning reference signals in the terminal response interval, i.e., the time interval from time t1 to time t2.

[0284] Set as Figure 10 、 Figure 13 As shown, for example, base station #1 of 901_1 transmits a sector scanning reference signal in the time interval from time t0 to time t1. Then, assume that in the time interval from time t1 to time t2, i.e., the terminal response interval, as shown in FIG. Figure 13 In this way, there is the first transmission interval 1301_1 of the "sector scanning reference signal" for the terminal, the second transmission interval 1301_2 of the "sector scanning reference signal" for the terminal, the third transmission interval 1301_3 of the "sector scanning reference signal" for the terminal, and the fourth transmission interval 1301_4 of the "sector scanning reference signal" for the terminal.

[0285] Therefore, in Figure 13 In the example, the base station #1 of 901_1 sets the "time division number for transmitting the reference signal for sector scanning when the terminal transmits the reference signal for sector scanning" to 4.

[0286] Figure 14 Shown with Figure 13 The example of the terminal's occupancy in the first transmission interval 1301_1 of the "sector scan reference signal" for the terminal, the second transmission interval 1301_2 of the "sector scan reference signal" for the terminal, the third transmission interval 1301_3 of the "sector scan reference signal" for the terminal, and the fourth transmission interval 1301_4 of the "sector scan reference signal" for the terminal is shown. Figure 14 In , the horizontal axis is time and the vertical axis is frequency.

[0287] Figure 9Terminal #1 of 902_1 receives the sector scanning reference signal 1001 transmitted by base station #1 of 901_1 and estimates the “frequency band, transmission panel antenna and parameter number” with good reception quality among the transmission panel antennas of base station #1 of 901_1. In addition, the estimation can be performed by obtaining the sector scanning 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)” contained in the sector scanning reference signal 1001. In addition, the “frequency band and / or frequency” contained in the sector scanning reference signal 1001 can also be used. Related information".

[0288] Assume that, for example, terminal #1 of 902_1 estimates "transmitting panel antenna a1 and parameter b1" as the "transmitting panel antenna and parameter" with good reception quality. Also, assume that terminal #1 of 902_1 sets the frequency band This is the frequency area where reception quality is estimated to be good.

[0289] In addition, terminal #1 of 902_1 estimates the "transmitting panel antenna and parameters" with good reception quality and obtains information on the "number of time divisions in which the terminal can transmit the reference signal for sector scanning when transmitting the reference signal for sector scanning." Figure 14 In the example, terminal #1 of 902_1 obtains the information that "when the terminal transmits a reference signal for sector scanning, the number of time divisions in which the reference signal for sector scanning can be transmitted" is 4.

[0290] In this case, the terminal #1 of 902_1 uses a random number to obtain a value such as "0", "1", "2", or "3". For example, suppose 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 Figure 14 The "terminal uses the first (= "0" + 1) transmission interval 1301_1 of the 'sector scanning reference signal'" to transmit the "sector scanning reference signal" 1401_1 of terminal #1. In addition, a random number is used here to set the transmission interval of the sector scanning reference signal. However, instead of a random number, a random number such as an integer or a natural number, an irregular integer or natural number, a regular integer or natural number, an integer or natural number reserved in a terminal-specific manner, etc. can also be used to set the transmission interval of the sector scanning reference signal. Therefore, the setting of the transmission interval of the sector scanning reference signal is not limited to the above example. For example, the transmission interval of the sector scanning reference signal can be set for each terminal. This point can also be applied to the following similar description.

[0291] Furthermore, it is assumed that the "sector scanning reference signal" 1401_1 of terminal #1 includes information on the "transmitting panel antenna and parameters" with good reception quality obtained by terminal #1 at 902_1, that is, information on "transmitting panel antenna a1 and parameter b1". Furthermore, the "sector scanning reference signal" 1401_1 of terminal #1 may also include information on "frequency region", that is, for example, "frequency band". "This information will be explained later.

[0292] Likewise, Figure 9 Terminal #2 of 902_2 receives the sector scanning reference signal 1001 sent by base station #1 of 901_1 and estimates the “frequency band, transmission panel antenna and parameter number” with good reception quality among the transmission panel antennas of base station #1 of 901_1. In addition, the estimation can be performed by obtaining the sector scanning 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)” contained in the sector scanning reference signal 1001. In addition, the “frequency band and / or frequency” contained in the sector scanning reference signal 1001 can also be used. Related information".

[0293] Assume that, for example, terminal #2 of 902_2 estimates "transmitting panel antenna a2 and parameter b2" as the "transmitting panel antenna and parameter" with good reception quality. Also, assume that terminal #2 of 902_2 sets the frequency band This is the frequency area where reception quality is estimated to be good.

[0294] In addition, terminal #2 of 902_2 estimates the "transmitting panel antenna and parameters" with good reception quality, and obtains information on the "number of time divisions in which the reference signal for sector scanning can be sent when the terminal sends the reference signal for sector scanning." Figure 14 In the example, terminal #2 of 902_2 obtains the information that "when the terminal transmits a reference signal for sector scanning, the number of time divisions in which the reference signal for sector scanning can be transmitted" is 4.

[0295] In this case, the terminal #2 of 902_2 uses a random number to obtain a value such as "0", "1", "2", or "3". For example, suppose the terminal #2 of 902_2 obtains "1" using a random number. In this case, since "1" + 1 = 2, the terminal #2 of 902_2 uses Figure 14 The terminal #2 transmits a “sector scan reference signal” 1401_2 in the “second (='1'+1) transmission interval 1301_2 of the terminal 'sector scan reference signal'”.

[0296] Furthermore, it is assumed that the "sector scan reference signal 1401_2" of terminal #2 includes information on the "transmitting panel antenna and parameters" with good reception quality obtained by terminal #2 at 902_2, that is, information on "transmitting panel antenna a2 and parameters b2". Furthermore, the "sector scan reference signal 1401_2" of terminal #2 may also include information on the "frequency region", that is, for example, "frequency band". "This information will be explained later.

[0297] Therefore, terminal #i of 902_i receives the sector scanning reference signal 1001 transmitted by base station #1 of 901_1 and estimates the "frequency band, transmission panel antenna and parameter number" with good reception quality among the transmission panel antennas of base station #1 of 901_1. In addition, the estimation can be performed by obtaining the sector scanning 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)" contained in the sector scanning reference signal 1001. In addition, for example, i is set to an integer greater than 1. In addition, the "frequency band and / or frequency" contained in the sector scanning reference signal 1001 can also be used. Related information".

[0298] Assume that, for example, terminal #i of 902_i estimates "transmitting panel antenna ai and parameters bi" as "transmitting panel antenna and parameters" with good reception quality. Also, assume that terminal #i of 902_i sets the frequency band This is the frequency area where reception quality is estimated to be good.

[0299] In addition, terminal #i of 902_i estimates the "transmitting panel antenna and parameters" with good reception quality and obtains information on the "number of time divisions in which the terminal can transmit the reference signal for sector scanning when transmitting the reference signal for sector scanning." Figure 14 In the example, terminal #i of 902_i obtains the information that "when the terminal transmits a reference signal for sector scanning, the number of time divisions in which the reference signal for sector scanning can be transmitted" is 4.

[0300] In this case, the terminal #i of 902_i uses a random number to obtain a value such as "0", "1", "2", or "3". For example, it is assumed that the terminal #i of 902_i obtains "yi" using a random number. In addition, yi is a value such as "0", "1", "2", or "3". In this case, the terminal #i of 902_i uses Figure 14 The terminal uses the ("yi"+1)th transmission interval 1301_("yi"+1) of the "sector scanning reference signal" to send the terminal #i the "sector scanning reference signal" 1401_i.

[0301] Furthermore, it is assumed that the “sector scan reference signal” 1401_i of terminal #i includes information on the “transmitting panel antenna and parameters” of the terminal #i with good reception quality, that is, information on the “transmitting panel antenna ai and parameters bi”. Furthermore, the “sector scan reference signal” 1401_i of terminal #i may also include information on the “frequency region”, that is, for example, the “frequency band”. "This information will be explained later.

[0302] In addition, if Figure 14 As shown, the “sector scan reference signal” 1401_i of terminal #i can also be allocated to multiple frequency bands. For example, the “sector scan reference signal” 1401_3 of terminal #3 is allocated to the frequency band and frequency band As another example, the "sector scanning reference signal" 1401_i of terminal #i is allocated to the frequency band and frequency band In this manner, the "sector scan reference signal" 1401_i of terminal #i may be allocated to discrete frequency bands. (Thus, the "sector scan reference signal" 1401_i of terminal #i is allocated to one or more frequency bands.)

[0303] This can reduce collisions between sector scanning reference signals sent by each terminal, thereby increasing the number of sector scanning reference signals that can be received by the base station, thereby increasing the number of terminals communicating with the base station.

[0304] For used Figure 14 The structure of the terminal #i "sector scanning reference signal" 1401_i transmitted by the terminal #i of 902_i will be described. In addition, for the sake of simplicity, it is assumed that the terminal #i of 902_i has Figure 1A 、 Figure 1B 、 Figure 1C In addition, let Figure 1A 、 Figure 1B 、 Figure 1C The terminal #i of the structure 902_i has Figure 3 However, the structure of the terminal #i of 902_i is not limited to Figure 1A 、 Figure 1B 、 Figure 1C The structure, in addition, has Figure 1A 、 Figure 1B 、 Figure 1C The structure of the transmitting panel antenna xi of the terminal #i 106_xi of the structure 902_i is not limited to Figure 3 .

[0305] 902_i's terminal #i Figure 14 As shown, terminal #i transmits a "sector scanning reference signal" 1401_i. Figure 15A An example of the structure of the "sector scanning reference signal" 1401_i of terminal #i is shown. Figure 15A In the example, the horizontal axis is time.

[0306] Set as Figure 15A As shown, the "sector scanning reference signal" 1401_i of terminal #i 902_i is composed of "sector scanning reference signal 1501_1 in the transmitting panel antenna 1 of terminal #i, sector scanning reference signal 1501_2 in the transmitting panel antenna 2 of terminal #i, ..., sector scanning reference signal 1501_M in the transmitting panel antenna M of terminal #i".

[0307] For example, with Figure 1A 、 Figure 1B 、 Figure 1C Terminal #i of the structure 902_i uses the transmitting panel antenna 1 of 106_1 to transmit the "reference signal 1501_1 for sector scanning in the transmitting panel antenna 1 of terminal #i".

[0308] Therefore, having Figure 1A 、 Figure 1B 、 Figure 1C Terminal #i of the configuration 902_i transmits "sector scanning reference signal 1501_k at transmitting panel antenna k of terminal #i" using transmitting panel antenna k of 106_k. Note that k is an integer greater than or equal to 1 and less than or equal to M.

[0309] In addition, Figure 15A In the example, the number of transmission panel antennas of terminal #i of 902_i is set to M, but the present invention is not limited thereto and the number of transmission panel antennas may be set to N. (Assume that N is an integer greater than or equal to 1.)

[0310] Figure 15B Show Figure 15A An example of the structure of "sector scanning reference signal 1501_xi for transmitting panel antenna xi of terminal #i". In FIG15 , the horizontal axis is assumed to be time.

[0311] Set as Figure 15BAs shown, the “reference signal 1501_xi for sector scanning in the transmitting panel antenna xi of terminal #i” is composed of, for example, “the reference signal 1511_1 using the first parameter in the transmitting panel antenna xi”, “the reference signal 1511_2 using the second parameter in the transmitting panel antenna xi”, “the reference signal 1511_3 using the third parameter in the transmitting panel antenna xi”, and “the reference signal 1511_4 using the fourth parameter in the transmitting panel antenna xi”.

[0312] And, for example, let us have Figure 1A 、 Figure 1B 、 Figure 1C The terminal #i of the structure 902_i has Figure 3 The structure serves as the transmitting panel antenna xi of 106_xi.

[0313] The “reference signal 1511_1 using the first parameter in the transmission panel antenna xi” will be described.

[0314] Send at terminal #i of 902_i Figure 15B When transmitting the reference signal 1511_1 using the first parameter from the transmission panel antenna xi, terminal #i at 902_i sets the multiplication coefficient of the multiplication unit 304_1 at the transmission panel antenna xi of 106_xi to w1(xi,1). If the first transmission signal 303_1 in the reference signal 1511_1 using the first parameter from the transmission panel antenna xi is tx1ref1(t), the multiplication unit 304_1 obtains tx1ref1(t)×w1(xi,1). Then, terminal #i at 902_i sets the multiplication coefficient of the multiplication unit 304_1 at the transmission panel antenna xi of 106_xi to w1(xi,1). Figure 3 Antenna 306_1 transmits tx1ref1(t)×w1(xi,1). In addition, t is time.

[0315] Send at terminal #i of 902_i Figure 15B When transmitting the reference signal 1511_1 using the first parameter from the transmission panel antenna xi, terminal #i at 902_i sets the multiplication coefficient of the multiplication unit 304_2 at the transmission panel antenna xi of 106_xi to w2(xi,1). If the second transmission signal 303_2 in the reference signal 1511_1 using the first parameter from the transmission panel antenna xi is set to tx2ref1(t), the multiplication unit 304_2 obtains tx2ref1(t)×w2(xi,1). Then, terminal #i at 902_i sets the multiplication coefficient of the multiplication unit 304_2 at the transmission panel antenna xi of 106_xi to w2(xi,1). Figure 3 Antenna 306_2 transmits tx2ref1(t)×w2(xi,1).

[0316] Send at terminal #i of 902_i Figure 15BWhen transmitting the reference signal 1511_1 using the first parameter from the transmission panel antenna xi, terminal #i at 902_i sets the multiplication coefficient of the multiplication unit 304_3 at the transmission panel antenna xi of 106_xi to w3(xi,1). If the third transmission signal 303_3 in the reference signal 1511_1 using the first parameter from the transmission panel antenna xi is set to tx3ref1(t), the multiplication unit 304_3 obtains tx3ref1(t)×w3(xi,1). Then, terminal #i at 902_i sets the multiplication coefficient of the multiplication unit 304_3 at the transmission panel antenna xi of 106_xi to w3(xi,1). Figure 3 Antenna 306_3 transmits tx3ref1(t)×w3(xi,1).

[0317] Send at terminal #i of 902_i Figure 15B When transmitting the reference signal 1511_1 using the first parameter from the transmission panel antenna xi, terminal #i at 902_i sets the multiplication coefficient of the multiplication unit 304_4 at the transmission panel antenna xi of 106_xi to w4(xi,1). If the fourth transmission signal 303_4 in the reference signal 1511_1 using the first parameter from the transmission panel antenna xi is set to tx4ref1(t), the multiplication unit 304_4 obtains tx4ref1(t)×w4(xi,1). Then, terminal #i at 902_i sets the multiplication coefficient of the multiplication unit 304_4 at the transmission panel antenna xi of 106_xi to w4(xi,1). Figure 3 Antenna 306_4 transmits tx4ref1(t)×w4(xi,1).

[0318] The “reference signal 1511_j using the j-th parameter in the transmission panel antenna xi” will be described.

[0319] Send at terminal #i of 902_i Figure 15B When transmitting the reference signal 1511_j using the jth parameter from the transmission panel antenna xi, terminal #i at 902_i sets the multiplication coefficient of the multiplication unit 304_1 at the transmission panel antenna xi at 106_xi to w1(xi,j). If the first transmission signal 303_1 in the reference signal 1511_j using the jth parameter from the transmission panel antenna xi is tx1refj(t), the multiplication unit 304_1 obtains tx1refj(t)×w1(xi,j). Next, terminal #i at 902_i sets the multiplication coefficient of the multiplication unit 304_1 at the transmission panel antenna xi at 106_xi to w1(xi,j). Figure 3 Antenna 306_1 transmits tx1refj(t)×w1(xi,j). In addition, t is time.

[0320] Send at terminal #i of 902_i Figure 15BWhen transmitting the reference signal 1511_j using the jth parameter from the transmission panel antenna xi, terminal #i at 902_i sets the multiplication coefficient of the multiplication unit 304_2 at the transmission panel antenna xi at 106_xi to w2(xi,j). If the second transmission signal 303_2 in the reference signal 1511_j using the jth parameter from the transmission panel antenna xi is tx2refj(t), the multiplication unit 304_2 obtains tx2refj(t)×w2(xi,j). Then, terminal #i at 902_i sets the multiplication coefficient of the multiplication unit 304_2 at the transmission panel antenna xi at 106_xi to w2(xi,j). Figure 3 Antenna 306_2 transmits tx2refj(t)×w2(xi,j).

[0321] Send at terminal #i of 902_i Figure 15B When transmitting the reference signal 1511_j using the jth parameter from the transmission panel antenna xi, terminal #i at 902_i sets the multiplication coefficient of the multiplication unit 304_3 at the transmission panel antenna xi at 106_xi to w3(xi,j). If the third transmission signal 303_3 in the reference signal 1511_j using the jth parameter from the transmission panel antenna xi is tx3refj(t), the multiplication unit 304_3 obtains tx3refj(t)×w3(xi,j). Next, terminal #i at 902_i sets the multiplication coefficient of the multiplication unit 304_3 at the transmission panel antenna xi at 106_xi to w3(xi,j). Figure 3 Antenna 306_3 transmits tx3refj(t)×w3(xi,j).

[0322] Send at terminal #i of 902_i Figure 15B When transmitting the reference signal 1511_j using the jth parameter from the transmission panel antenna xi, terminal #i at 902_i sets the multiplication coefficient of the multiplication unit 304_4 at the transmission panel antenna xi at 106_xi to w4(xi,j). If the fourth transmission signal 303_4 in the reference signal 1511_j using the jth parameter from the transmission panel antenna xi is tx4refj(t), the multiplication unit 304_4 obtains tx4refj(t)×w4(xi,j). Next, terminal #i at 902_i sets the multiplication coefficient of the multiplication unit 304_4 at the transmission panel antenna xi at 106_xi to w4(xi,j). Figure 3 Antenna 306_4 transmits tx4refj(t)×w4(xi,j).

[0323] in addition, Figure 15B In the equation ( ), j is an integer greater than or equal to 1 and less than or equal to 4. Figure 15B In the example, the number of parameter changes Z is set to Z=4, but the number of parameter changes Z is not limited to 4. The same implementation can be performed as long as Z is an integer greater than 1 or an integer greater than 2. In this case, j is an integer greater than 1 and less than Z.

[0324] Set as, Figure 14 、 Figure 15A 、 Figure 15B As shown, when terminal #i of 902_i transmits "reference signal 1501_xi for sector scanning in transmitting panel antenna xi of terminal #i", "reference signal 1511_j using j-th parameter in transmitting panel antenna xi" includes the following information, for example.

[0325] Information on the "transmitting panel antenna and parameters" of base station #1 of 901_1 with good reception quality as described above.

[0326] Therefore, terminal #i of 902_i is Figure 15A The "reference signal 1501_1 for sector scanning in the transmitting panel antenna 1 of terminal #i", "reference signal 1501_2 for sector scanning in the transmitting panel antenna 2 of terminal #i", ..., "reference signal 1501_M for sector scanning in the transmitting panel antenna M of terminal #i" sends "information on the 'transmitting panel antenna and parameters' of base station #1 with good reception quality 901_1".

[0327] In addition, in the Figure 15A 'Sector scanning reference signal 1501_1 for transmitting panel antenna 1 of terminal #i', 'sector scanning reference signal 1501_2 for transmitting panel antenna 2 of terminal #i', ..., 'sector scanning reference signal 1501_M for transmitting panel antenna M of terminal #i'" Figure 15B In the "reference signal 1511_1 using the first parameter in the sending panel antenna xi", "reference signal 1511_2 using the second parameter in the sending panel antenna xi", "reference signal 1511_3 using the third parameter in the sending panel antenna xi", and "reference signal 1511_4 using the fourth parameter in the sending panel antenna xi", the terminal #i of 902_i sends "the information of the 'transmitting panel antenna and parameters' of the base station #1 of 901_1 with good reception quality".

[0328] In this case, for example, even if an omni-directional antenna is used, the base station #1 of 901_1 can receive the “ Figure 15AThe possibility of receiving one of the sector scanning reference signals among the 'sector scanning reference signal 1501_1 in the transmitting panel antenna 1 of terminal #i', 'sector scanning reference signal 1501_2 in the transmitting panel antenna 2 of terminal #i', ..., 'sector scanning reference signal 1501_M in the transmitting panel antenna M of terminal #i'" will also increase. The reason is that the terminal #i of 902_i performs transmission beamforming (directivity control). As a result, the base station #1 of 901_1 can obtain the following: This has the following effect: the likelihood of receiving the "information on the 'transmitting panel antenna and parameters' of base station #1 at 901_1 with good reception quality" transmitted by terminal #i at 902_i increases. Consequently, base station #1 at 901_1 can transmit a modulated signal to terminal #i at 902_i based on the "information on the 'transmitting panel antenna and parameters' of base station #1 at 901_1 with good reception quality," and terminal #i at 902_i can receive the modulated signal with high reception quality.

[0329] In addition, in Figure 14 In that case, when reference signals for sector scanning are sent by multiple terminals, base station #1 of 901_1 can obtain the "information of 'transmitting panel antenna and parameters' of base station #1 of 901_1 with good reception quality" of multiple terminals. As a result, the following effect can be obtained, that is, base station #1 of 901_1 can send modulated signals to multiple terminals based on the "information of 'transmitting panel antenna and parameters' of base station #1 of 901_1 with good reception quality" of multiple terminals, and multiple terminals can receive the modulated signals with high reception quality.

[0330] In addition, if Figure 14 、 Figure 15A 、 Figure 15B As shown, when terminal #i of 902_i transmits "reference signal 1501_xi for sector scanning in transmitting panel antenna xi of terminal #i", "reference signal 1511_j using jth parameter in transmitting panel antenna xi" may include the following information, for example.

[0331] The ID (identification number) of the transmitting panel antenna (here, for example, equivalent to xi)

[0332] Identification number (ID) of the parameter used for beamforming (directivity control) (here, for example, equivalent to j)

[0333] By sending the "ID (identification) of the transmitting panel antenna" and the "identification (ID) of the parameters used for beamforming (directivity control)" through the terminal #i of 902_i, the base station #1 of 901_1 can know the received "ID (identification) of the transmitting panel antenna" and the "identification (ID) of the parameters used for beamforming (directivity control)", and the terminal #i of 902_i and the base station #1 of 901_1 can perform appropriate control, thereby achieving the effect of improving the data reception quality.

[0334] And, as Figure 14 、 Figure 15A 、 Figure 15B As shown, when terminal #i of 902_i transmits "reference signal 1501_xi for sector scanning in transmitting panel antenna xi of terminal #i", "reference signal 1511_j using jth parameter in transmitting panel antenna xi" may include the following information, for example.

[0335] The frequency band and / or frequency band used by terminal #i 902_i in transmission or intended to be used by base station #1 901_1 Related information"

[0336] The terminal #i of 902_i sends the "with frequency band and / or frequency Related information”, base station #1 of 901_1 can know “the frequency band and / or frequency Related information", terminal #i of 902_i and base station #1 of 901_1 can perform appropriate control, thereby achieving the effect of improving the reception quality of data.

[0337] It should be noted that, when the base station #1 of 901_1 and the terminal #i of 902_i use the same frequency band for communication, even if the “frequency band and / or frequency "Information related to the frequency band and / or frequency" can also be obtained by mutually detecting the modulation signal sent by the other party. Related information".

[0338] Figure 16A Shown to exist Figure 10 An example of the structure of the feedback signal 1002 sent by the base station #1 of 901_1 in the time interval from t2 to t3. Figure 16A In the example, the horizontal axis is time and the vertical axis is frequency. In this example, because the number of time divisions for sending the reference signal for sector scanning when the terminal sends the reference signal for sector scanning is 4, Figure 16AAs shown, feedback signal 1002 includes a first transmission interval, a second transmission interval, a third transmission interval, and a fourth transmission interval. Alternatively, for example, when "the number of time divisions in which a terminal can transmit a sector scanning reference signal when transmitting a sector scanning reference signal" is Ω, feedback signal 1002 may include Ω transmission intervals. Ω is an integer greater than or equal to 1 or an integer greater than or equal to 2.

[0339] In addition, let Figure 16A In the feedback signal 1002, there is a frequency band frequency band frequency band

[0340] Therefore, in the first transmission interval, there is a frequency Feedback signal 1st sending interval 1601_11, frequency Feedback signal 1st transmission interval 1601_21, ..., frequency The first transmission interval 1601_K1 is used for the feedback signal. Similarly, in the second transmission interval, there is a frequency Feedback signal second transmission interval 1601_12, frequency Feedback signal second transmission interval 1601_22, ..., frequency The feedback signal is sent in the second transmission interval 1601_K2. In the third transmission interval, there is a frequency Feedback signal 3rd sending interval 1601_13, frequency Feedback signal 3rd sending interval 1601_23, ..., frequency The third transmission interval 1601_K3 is used for the feedback signal. In the fourth transmission interval, there is a frequency Use the feedback signal 4 to send interval 1601_14, frequency Feedback signal 4th sending interval 1601_24, ..., frequency The feedback signal is sent in the fourth transmission interval 1601_K4.

[0341] “ Figure 16A In the i-th time interval, a feedback signal is transmitted from the same transmitting panel antenna regardless of the frequency band.

[0342] Figure 16B Shown for Figure 16A The feedback signal 1002 shown is an example of a specific feedback signal distribution.

[0343] For example, set Figure 14As shown, terminal #1 of 902_1 sends terminal #1 "reference signal for sector scanning" 1401_1, terminal #2 of 902_2 sends terminal #2 "reference signal for sector scanning" 1401_2, terminal #3 of 902_3 sends terminal #3 "reference signal for sector scanning" 1401_3, terminal #4 of 902_4 sends terminal #4 "reference signal for sector scanning" 1401_4, terminal #5 of 902_5 sends terminal #5 "reference signal for sector scanning" 1401_5, and terminal #6 of 902_6 sends terminal #6 "reference signal for sector scanning" 1401_6.

[0344] like Figure 14 As shown, the terminal #1 "sector scanning reference signal" 1401_1 exists in the frequency band therefore, Figure 16B In the case of the feedback signal 1611_1 sent to terminal #1, the feedback signal 1611_1 exists in the frequency band

[0345] like Figure 14 As shown, the terminal #2 "sector scanning reference signal" 1401_2 exists in the frequency band therefore, Figure 16B In the case of the feedback signal 1611_2 sent to terminal #2, the feedback signal 1611_2 is present in the frequency band

[0346] like Figure 14 As shown, the terminal #3 "sector scanning reference signal" 1401_3 exists in the frequency band therefore, Figure 16B The feedback signal 1611_3 sent to terminal #3 exists in the frequency band

[0347] like Figure 14 As shown, the terminal #4 "sector scanning reference signal" 1401_4 exists in the frequency band therefore, Figure 16B The feedback signal 1611_4 sent to terminal #4 exists in the frequency band

[0348] like Figure 14 As shown, the terminal #5 "sector scanning reference signal" 1401_5 exists in the frequency band therefore, Figure 16B In the case of the feedback signal 1611_5 sent to terminal #5, the feedback signal 1611_5 is present in the frequency band

[0349] like Figure 14 As shown, the terminal #6 "sector scanning reference signal" 1401_6 exists in the frequency band therefore, Figure 16BIn the case of the feedback signal 1611_6 sent to terminal #6, the feedback signal 1611_6 is present in the frequency band

[0350] Thus, the terminal #i of 902_i can know that it is able to communicate with the base station #1 of 901_1 and can also know the frequency band used by obtaining the feedback signal 1611_i sent to the terminal #i. Figure 16B This is just an example. For example, if there is no feedback signal 1611_1 sent to terminal #1 as the feedback signal 1002, terminal #1 at 902_1 will know that communication with base station #1 at 901_1 is not established.

[0351] At this time, it is assumed that the feedback signal 1611_i sent to the terminal #i includes, for example, that the terminal #i 902_i can communicate (or Figure 10 Frame 1003 containing data symbols includes information about symbols sent to terminal #i of 902_i).

[0352] In addition, based on the "information on the frequency (band) of base station #1 901_1 with good reception quality and information on the transmitting panel antenna and parameters" sent by terminal #i 902_i, base station #1 901_1 selects the frequency (band), the transmitting panel antenna, sets the parameters of the beamforming, and sends a feedback signal 1611_i to terminal #i.

[0353] Figure 17A Shown to exist Figure 10 An example of the structure of the frame 1003 containing the data symbols transmitted by the base station #1 of 901_1 in the time interval from t4 to t5. Figure 17A In the example, the horizontal axis is time and the vertical axis is frequency. In this example, because the number of time divisions for sending the reference signal for sector scanning when the terminal sends the reference signal for sector scanning is 4, Figure 17A As shown, a frame 1003 containing data symbols includes a first transmission interval, a second transmission interval, a third transmission interval, and a fourth transmission interval. Alternatively, for example, when "the number of time divisions in which a terminal can transmit a sector scanning reference signal when transmitting a sector scanning reference signal" is Ω, a frame 1003 containing data symbols includes Ω transmission intervals. Ω is an integer greater than or equal to 1 or an integer greater than or equal to 2.

[0354] In addition, let Figure 17A In the frame 1003 containing the data symbol, there is a frequency band frequency band frequency band

[0355] Therefore, in the first transmission interval, there is a frequency Use the modulation signal (time slot) to send the first interval 1701_11, frequency The first transmission interval 1701_21, ..., frequency The first transmission interval 1701_K1 is transmitted using a modulated signal (time slot). Similarly, in the second transmission interval, there is a frequency The second transmission interval 1701_12 is used for the modulation signal (time slot), and the frequency The second transmission interval 1701_22, ..., frequency is used for the modulation signal (time slot) The second transmission interval 1701_K2 is transmitted using the modulated signal (time slot). In the third transmission interval, there is a frequency The modulation signal (time slot) is used to transmit the third interval 1701_13, the frequency The modulation signal (time slot) is used to transmit the third interval 1701_23, ..., frequency The third transmission interval 1701_K3 is used with the modulated signal (time slot). In the fourth transmission interval, there is a frequency The modulation signal (time slot) is used for the 4th transmission interval 1701_14, the frequency The modulation signal (time slot) is used to transmit the 4th interval 1701_24, ..., frequency Use the modulated signal (time slot) for the 4th transmission interval 1701_K4.

[0356] Figure 17B Shown for Figure 17A 1003 shows an example of allocation of specific modulation signals (time slots) to frame 1003 containing data symbols.

[0357] For example, set Figure 14 As shown, terminal #1 of 902_1 sends terminal #1 "reference signal for sector scanning" 1401_1, terminal #2 of 902_2 sends terminal #2 "reference signal for sector scanning" 1401_2, terminal #3 of 902_3 sends terminal #3 "reference signal for sector scanning" 1401_3, terminal #4 of 902_4 sends terminal #4 "reference signal for sector scanning" 1401_4, terminal #5 of 902_5 sends terminal #5 "reference signal for sector scanning" 1401_5, and terminal #6 of 902_6 sends terminal #6 "reference signal for sector scanning" 1401_6.

[0358] like Figure 14 As shown, the terminal #1 "sector scanning reference signal" 1401_1 exists in the frequency band therefore, Figure 17B In the frequency band, the modulated signal (time slot) 1711 sent to terminal #1 exists in the frequency band

[0359] like Figure 14 As shown, the terminal #2 "sector scanning reference signal" 1401_2 exists in the frequency band therefore, Figure 17B The modulated signal (time slot) 1712 sent to terminal #2 exists in the frequency band

[0360] like Figure 14 As shown, the terminal #3 "sector scanning reference signal" 1401_3 exists in the frequency band therefore, Figure 17B The modulated signal (time slot) 1713 sent to terminal #3 exists in the frequency band

[0361] like Figure 14 As shown, the terminal #4 "sector scanning reference signal" 1401_4 exists in the frequency band therefore, Figure 17B The modulated signal (time slot) 1714 sent to terminal #4 exists in the frequency band

[0362] like Figure 14 As shown, the terminal #5 "sector scanning reference signal" 1401_5 exists in the frequency band therefore, Figure 17B The modulated signal (time slot) 1715 sent to terminal #5 exists in the frequency band

[0363] like Figure 14 As shown, the terminal #6 "sector scanning reference signal" 1401_6 exists in the frequency band therefore, Figure 17B The modulated signal (time slot) 1716 sent to terminal #6 exists in the frequency band

[0364] At this time, it is assumed that the modulated signal (time slot) 171i addressed to the terminal #i includes, for example, a data symbol (data, information) addressed to the terminal #i of 902_i.

[0365] Thus, through the modulated signal (time slot) 171i sent to terminal #i, terminal #i at 902_i can know that it is able to communicate with base station #1 at 901_1 and can also know the frequency band used. Figure 17B This is just an example. For example, if there is no modulated signal (time slot) 1711 sent to terminal #1 as frame 1003 containing data codewords, terminal #1 902_1 will know that communication with base station #1 901_1 is not established.

[0366] At this time, based on the "information on the frequency (band) with good reception quality and the transmitting panel antenna and parameters of the base station #1 of 901_1", the base station #1 of 901_1 selects the frequency (band), the transmitting panel antenna, sets the parameters of the beamforming, and sends the modulated signal (time slot) 171i to the terminal #i.

[0367] Alternatively, Figure 16A 、 Figure 16B In the process, base station #1 of 901_1 receives the "reference signal 1401_i for sector scanning of terminal #i sent by terminal #i of 902_i", and estimates the "frequency (band)" and "transmitting panel antenna and parameters" of terminal #i of 902_1 with good reception quality. This information is included in the feedback signal 1611_i sent to terminal #i.

[0368] Therefore, terminal #i of 902_i selects the frequency (frequency band), the transmitting panel antenna, sets the beamforming method, and sends the code element, frame and / or modulated signal to base station #1 of 901_1 based on the information of "frequency (frequency band)" and "transmitting panel antenna and parameters" of terminal #i of 902_i with good reception quality obtained from base station #1 of 901_1, thereby achieving the effect of improving the reception quality of data in base station #1 of 901_1.

[0369] In addition, Figure 10 During the time interval from t3 to t4, terminal #i of 902_i may also transmit a modulated signal including information such as ACK (acknowledgement) indicating that a signal from base station #1 of 901_1 has been received to base station #1 of 901_1.

[0370] In addition, Figure 17B In addition to data symbols, the modulated signal (time slot) 171i sent to terminal #i may also include, for example, reference signals such as "DMRS (demodulation reference signal), PTRS (phase tracking reference signal), SRS (sounding reference signal)," pilot symbols, pilot signals, preambles, and symbols containing control information. Symbols containing control information include information about the destination terminal (an ID that can identify the terminal), the method for transmitting the modulated signal, information about the modulation scheme, information about the error correction coding scheme (code length, coding rate, etc.), and information about the MCS (Modulation and Coding Scheme).

[0371] Figure 18 Shown as Figure 9 This is an example of a situation in which 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 902_4, terminal #5 of 902_5, and terminal #6 of 902_6." Figure 18 (A) shows an example of the transmission status of the modulated signal of the base station #1 of 901_1. Figure 18 (B) shows an example of the transmission status of the modulated signal of "Terminal #1 of 902_1, Terminal #2 of 902_2, Terminal #3 of 902_3, Terminal #4 of 902_4, Terminal #5 of 902_5, Terminal #6 of 902_6". In addition, Figure 18 (A) Figure 18 In (B), the horizontal axis is assumed to be time.

[0372] First, the base station #1 of 901_1 transmits the sector scanning reference signal 1801_1. Figure 10 The description has been given, so the description is omitted.

[0373] Next, the terminals "Terminal #1 of 902_1, Terminal #2 of 902_2, Terminal #3 of 902_3, Terminal #4 of 902_4, Terminal #5 of 902_5, Terminal #6 of 902_6" transmit the sector scanning reference signal 1851_1. Figure 13 、 Figure 14 、 Figure 15A 、 Figure 15B etc., so the description is omitted.

[0374] Base station #1 of 901_1 sends feedback signal 1802_1. Figure 16A 、 Figure 16B The description has been given, so the description is omitted.

[0375] Then, the base station #1 of 901_1 transmits "frame 1803_1 including data symbols". Figure 17A 、 Figure 17B Since the above description has been given, the description thereof will be omitted. (Therefore, "frame 1803_1 including data symbols" is considered to be a frame for downlink, for example.)

[0376] Next, the terminals "Terminal #1 of 902_1, Terminal #2 of 902_2, Terminal #3 of 902_3, Terminal #4 of 902_4, Terminal #5 of 902_5, and Terminal #6 of 902_6" transmit "frame 1852_1 containing data symbols." The structure of this frame will be described later. 20A to 20F(Thus, "frame 1852_1 including data symbols" is considered to be an uplink frame, for example.)

[0377] Next, the base station #1 of 901_1 transmits "frame 1803_2 including data symbols". In addition, the method of forming "frame 1803_2 including data symbols" is as follows: Figure 17A 、 Figure 17B Carry out the method described in the description.

[0378] Next, the terminals "Terminal #1 of 902_1, Terminal #2 of 902_2, Terminal #3 of 902_3, Terminal #4 of 902_4, Terminal #5 of 902_5, and Terminal #6 of 902_6" transmit "frame 1852_2 containing data symbols." The structure of this frame will be described later. 20A to 20F Provide explanation.

[0379] Figure 19 Shown Figure 18 Examples of the subsequent transmission status of the modulated signal of base station #1 of 901_1 and the transmission status of the modulated signals of terminals such as "terminal #1 of 902_1, terminal #2 of 902_2, terminal #3 of 902_3, terminal #4 of 902_4, terminal #5 of 902_5, and terminal #6 of 902_6".

[0380] Figure 19 (A) shows an example of the transmission status of the modulated signal of the base station #1 of 901_1, which is continuous in time with Figure 18 (A) The transmission status of the modulated signal of base station #1 of 901_1.

[0381] Figure 19 (B) shows an example of the transmission status of the modulated signal of "terminal #1 of 902_1, terminal #2 of 902_2, terminal #3 of 902_3, terminal #4 of 902_4, terminal #5 of 902_5, terminal #6 of 902_6", which is continuous in time from Figure 18 (B) The transmission status of the modulated signals of "terminal #1 of 902_1, terminal #2 of 902_2, terminal #3 of 902_3, terminal #4 of 902_4, terminal #5 of 902_5, and terminal #6 of 902_6".

[0382] in addition, Figure 19 (A) Figure 19 In (B), the horizontal axis is assumed to be time.

[0383] exist Figure 18 (A) Figure 18After (B), the base station #1 of 901_1 transmits "frame 1803_3 containing data symbols". In addition, the formation method of "frame 1803_3 containing data symbols" is as follows: Figure 17A 、 Figure 17B Carry out the method described in the description.

[0384] Next, the terminals "Terminal #1 of 902_1, Terminal #2 of 902_2, Terminal #3 of 902_3, Terminal #4 of 902_4, Terminal #5 of 902_5, and Terminal #6 of 902_6" transmit "frame 1852_3 containing data symbols." The structure of this frame will be described later. 20A to 20F Provide explanation.

[0385] Next, the base station #1 of 901_1 transmits the sector scanning reference signal 1801_2. Figure 10 The description has been given, so the description is omitted.

[0386] Next, the terminals "Terminal #1 of 902_1, Terminal #2 of 902_2, Terminal #3 of 902_3, Terminal #4 of 902_4, Terminal #5 of 902_5, Terminal #6 of 902_6" transmit the sector scanning reference signal 1851_2. Figure 13 、 Figure 14 、 Figure 15A 、 Figure 15B etc., so the description is omitted.

[0387] Base station #1 of 901_1 sends feedback signal 1802_2. Figure 16A 、 Figure 16B The description has been given, so the description is omitted.

[0388] Next, the base station #1 of 901_1 transmits "frame 1803_4 containing data symbols". Figure 17A 、 Figure 17B The description has been given, so the description is omitted.

[0389] Next, the terminals "Terminal #1 of 902_1, Terminal #2 of 902_2, Terminal #3 of 902_3, Terminal #4 of 902_4, Terminal #5 of 902_5, and Terminal #6 of 902_6" transmit "frame 1852_4 containing data symbols." The structure of this frame will be described later. 20A to 20F Provide explanation.

[0390] In this way, before "base station #1 of 901_1 transmits a 'frame containing data symbols', and / or before "terminal #1 of 902_1, terminal #2 of 902_2, terminal #3 of 902_3, terminal #4 of 902_4, terminal #5 of 902_5, terminal #6 of 902_6, etc. transmit a 'frame containing data symbols'", base station #1 of 901_1 and the terminal transmit a sector scanning reference signal, and before "base station #1 of 901_1 transmits a 'frame containing data symbols'", And / or after terminals such as 'terminal #1 of 902_1, terminal #2 of 902_2, terminal #3 of 902_3, terminal #4 of 902_4, terminal #5 of 902_5, and terminal #6 of 902_6' send 'a frame containing data symbols', a reference signal for sector scanning is sent again to set the frequency (band), select the transmitting panel antenna to be used, and set the transmit beamforming. This enables the base station and the terminal to obtain high data reception quality.

[0391] Next, use 20A to 20F The following describes a structure 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, terminal #4 of 902_4, terminal #5 of 902_5, and terminal #6 of 902_6". For example, i is set to an integer greater than 1. 20A to 20F , the horizontal axis is time.

[0392] Set as Figure 20A 、 Figure 20B 、 Figure 20C 、 Figure 20D 、 Figure 20E 、 Figure 20F As shown, the "frame 1852_i containing data symbols" is composed of the first transmission interval, the second transmission interval, the third transmission interval, and the fourth transmission interval. In addition, it is assumed that there is a frequency band in the "frame 1852_i containing data symbols". frequency band frequency band

[0393] like Figure 20A As shown, for example, terminal #1 of 902_1 uses the frequency band In the first transmission interval, terminal #1 transmits frame 2001_1 (including data symbols).

[0394] In addition, "Terminal #1 of 902_1 uses the frequency band The reason why the terminal #1 that sends the frame 2001_1 (containing data symbols) is that Figure 17B As shown, "Base station #1 of 901_1 uses the frequency band Send the modulated signal (time slot) destined for terminal #1 of 902_1.

[0395] In addition, if Figure 20B As shown, for example, terminal #2 of 902_2 uses the frequency band In the second transmission interval, terminal #2 transmits frame 2001_2 (including data symbols).

[0396] In addition, "Terminal #2 of 902_2 uses the frequency band The reason why the terminal #2 that sends the frame (containing data symbols) is that Figure 17B As shown, "Base station #1 of 901_1 uses the frequency band Send the modulated signal (time slot) destined for terminal #2 of 902_2.

[0397] like Figure 20C As shown, for example, terminal #3 of 902_3 uses the frequency band In the third transmission interval, terminal #3 transmits frame 2001_3 (including data symbols).

[0398] In addition, "Terminal #3 of 902_3 uses the frequency band The reason why the terminal #3 that sends the frame 2001_3" (containing data symbols) is that Figure 17B As shown, "Base station #1 of 901_1 uses the frequency band Send the modulated signal (time slot) destined for terminal #3 of 902_3.

[0399] like Figure 20D As shown, for example, terminal #4 of 902_4 uses the frequency band In the first transmission interval, terminal #4 transmits frame 2001_4 (including data symbols).

[0400] In addition, "Terminal #4 of 902_4 uses the frequency band The terminal #4 that sends the frame 2001_4" (containing data symbols) is because Figure 17B As shown, "Base station #1 of 901_1 uses the frequency band Send the modulated signal (time slot) destined for terminal #4 at 902_4.

[0401] like Figure 20E As shown, for example, terminal #5 of 902_5 uses the frequency band In the fourth transmission interval, terminal #5 transmits frame 2001_5 (including data symbols).

[0402] In addition, "Terminal #5 of 902_5 uses the frequency band The terminal #5 that sends the frame 2001_5" (containing data symbols) is because, Figure 17B As shown, "Base station #1 of 901_1 uses the frequency band Send the modulated signal (time slot) destined for terminal #5 of 902_5.

[0403] like Figure 20F As shown, for example, terminal #6 of 902_6 uses the frequency band In the third transmission interval, terminal #6 transmits frame 2001_6 (including data symbols).

[0404] In addition, "Terminal #6 of 902_6 uses the frequency band The terminal #6 that sends the frame (containing data symbols) sends the frame 2001_6" because, Figure 17B As shown, "Base station #1 of 901_1 uses the frequency band Send the modulated signal (time slot) destined for terminal #6 of 902_6.

[0405] In this way, by performing OFDMA on the "frame 1852_i containing data codewords" sent by terminals such as "terminal #1 of 902_1, terminal #2 of 902_2, terminal #3 of 902_3, terminal #4 of 902_4, terminal #5 of 902_5, and terminal #6 of 902_6", and performing time division, each terminal sends a frame, and the base station #1 of 901_1 receives the frame sent by each terminal, thereby suppressing interference and thus achieving high data reception quality.

[0406] In addition, Figure 20A 、 Figure 20B 、 Figure 20C 、 Figure 20D 、 Figure 20E 、 Figure 20F In the frame 2001_1 sent by terminal #1, the frame 2001_2 sent by terminal #2, the frame 2001_3 sent by terminal #3, the frame 2001_4 sent by terminal #4, the frame 2001_5 sent by terminal #6, in addition to the data codewords, it can also include "reference signals such as DMRS, PTRS, SRS", pilot codewords, pilot signals, preambles, codewords containing control information, etc.

[0407] exist Figure 20A 、 Figure 20B 、 Figure 20C 、 Figure 20D 、 Figure 20E 、 Figure 20FIn the description, OFDMA and time division are performed on frames sent by the terminal, but MU-MIMO (Multi User-MIMO (Multiple-Input Multiple-Output)) can also be used to spatially divide the frames sent by the terminal.

[0408] Figure 14 In the figure, it is shown that Figure 13 The example of terminal occupancy related to "the first transmission interval 1301_1 of the terminal for the 'sector scanning reference signal', the second transmission interval 1301_2 of the terminal for the 'sector scanning reference signal', the third transmission interval 1301_3 of the terminal for the 'sector scanning reference signal', and the fourth transmission interval 1301_4 of the terminal for the 'sector scanning reference signal'" is shown.

[0409] Figure 21A 、 Figure 21B In the description, it is different from Figure 14 of, and Figure 13 The example of terminal occupancy related to "the first transmission interval 1301_1 of the terminal for the 'sector scanning reference signal', the second transmission interval 1301_2 of the terminal for the 'sector scanning reference signal', the third transmission interval 1301_3 of the terminal for the 'sector scanning reference signal', and the fourth transmission interval 1301_4 of the terminal for the 'sector scanning reference signal'" is shown.

[0410] exist Figure 21A 、 Figure 21B In the Figure 13 、 Figure 14 The same reference numerals are given to parts that have the same operation, and their description has been omitted. The following describes the differences from the description in 14.

[0411] Figure 9 Terminal #2 of 902_2 can communicate with base station #1 of 901_1 by receiving the sector scanning reference signal 1001 sent by base station #1 of 901_1, and obtaining the "frequency (band)" with good reception quality, "ID (identification) (identification number) of the transmitting panel antenna" and "identification number (ID) of the parameters used for beamforming (directional control)".

[0412] Assume that terminal #2 of 902_2 estimates the frequency band As the "frequency (band)" with good reception quality, for example, the "transmitting panel antenna a2 and parameters b2" are estimated as the "transmitting panel antenna and parameters" with good reception quality.

[0413] In addition, terminal #2 of 902_2 estimates the "transmitting panel antenna and parameters" with good reception quality, and obtains information on the "number of time divisions in which the reference signal for sector scanning can be sent when the terminal sends the reference signal for sector scanning." Figure 21A In the example, terminal #2 of 902_2 obtains the information that "when the terminal transmits a reference signal for sector scanning, the number of time divisions in which the reference signal for sector scanning can be transmitted" is 4.

[0414] In this case, the terminal #2 of 902_2 uses a random number to obtain a value such as "0", "1", "2", or "3". For example, suppose 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 Figure 21A As shown, the frequency band used The “terminal uses the sector scan reference signal” third transmission interval 1301_3 to transmit the terminal #2 “sector scan reference signal” 1401_2.

[0415] Furthermore, it is assumed that the "sector scanning reference signal" 1401_2 of terminal #2 includes information on the "transmitting panel antenna and parameters" with good reception quality obtained by terminal #2 at 902_2, that is, information on the "transmitting panel antenna a2 and parameters b2".

[0416] Figure 9 Terminal #3 of 902_3 can communicate with base station #1 of 901_1 by receiving the sector scanning reference signal 1001 sent by base station #1 of 901_1, and obtaining the "frequency (band)" with good reception quality, "ID (identification) (identification number) of the transmitting panel antenna" and "identification number (ID) of the parameters used for beamforming (directionality control)".

[0417] Assume that terminal #3 of 902_3 estimates the frequency band As the "frequency (band)" with good reception quality, for example, "transmitting panel antenna a3 and parameters b3" are estimated as the "transmitting panel antenna and parameters" with good reception quality.

[0418] In addition, terminal #3 of 902_3 estimates the "transmitting panel antenna and parameters" with good reception quality, and obtains information on the "number of time divisions in which the reference signal for sector scanning can be sent when the terminal sends the reference signal for sector scanning." Figure 21B In the example, terminal #3 of 902_3 obtains the information that "when the terminal transmits a reference signal for sector scanning, the number of time divisions in which the reference signal for sector scanning can be transmitted" is 4.

[0419] In this case, the terminal #3 of 902_3 uses the random number to obtain a value such as "0", "1", "2", or "3". For example, suppose the terminal #3 of 902_3 obtains "2" using the random number. In this case, since "2" + 1 = 3, the terminal #3 of 902_3 Figure 21B As shown, the frequency band used The “terminal uses the sector scan reference signal” third transmission interval 1301_3 to transmit the terminal #3 “sector scan reference signal” 1401_3.

[0420] Furthermore, it is assumed that the "sector scanning reference signal" 1401_3 of terminal #3 includes information on the "transmitting panel antenna and parameters" with good reception quality obtained by terminal #3 at 902_3, that is, information on the "transmitting panel antenna a3 and parameters b3".

[0421] At this time, if Figure 21A 、 Figure 21B As shown, the time intervals of "terminal #2' sector-scan reference signal '1401_2' transmitted by terminal #2 of 902_2" and "terminal #3' sector-scan reference signal '1401_3' transmitted by terminal #3 of 902_3" overlap.

[0422] Therefore, base station #1 at 901_1 may simultaneously receive the “sector scan reference signal” 1401_2 of terminal #2 and the “sector scan reference signal” 1401_3 of terminal #3.

[0423] In this context, the following two examples can be considered.

[0424] <Example 1>

[0425] Both "terminal #2' sector scanning reference signal '1401_2' transmitted by terminal #2 of 902_2" and "terminal #3' sector scanning reference signal '1401_3' transmitted by terminal #3 of 902_3" are Figure 15A 、 Figure 15B structure.

[0426] In this case, it is assumed that the "parameters of the transmitting panel antenna and beamforming of terminal #2 at 902_2 with good reception quality when receiving the 'sector scanning reference signal ' 1401_2 for terminal #2 sent by terminal #2 at 902_2'" at base station #1 at 901_1 are different from the "parameters of the transmitting panel antenna and beamforming of terminal #3 at 902_3 with good reception quality when receiving the 'sector scanning reference signal ' 1401_3 for terminal #3 sent by terminal #3 at 902_3'" at base station #1 at 901_1. Therefore, base station #1 at 901_1 obtains the information contained in the "sector scanning reference signal ' 1401_2 for terminal #2 sent by terminal #2 at 902_2" and the information contained in the "sector scanning reference signal ' 1401_3 for terminal #3 sent by terminal #3 at 902_3."

[0427] In this case, for example, Figure 16A In the “Frequency The second transmission interval 1601_12 of the feedback signal is set as the signal sent to the terminal #2 of 902_2, and the frequency The third transmission interval 1601_13 of the feedback signal is set to be a signal sent to terminal #3 in 902_3.

[0428] In addition, for example, Figure 17A In the “Frequency Use the modulation signal (time slot) to set the second transmission interval 1701_12 as the signal sent to the terminal #2 of 902_2, and "set the frequency The modulated signal (time slot) third transmission interval 1701_13 is set as a signal destined for terminal #3 at 902_3.

[0429] As a result, base station #1 of 901_1 can communicate with terminal #2 of 902_2 and terminal #3 of 902_3.

[0430] <Example 2>

[0431] Both "terminal #2' sector scanning reference signal '1401_2' transmitted by terminal #2 of 902_2" and "terminal #3' sector scanning reference signal '1401_3' transmitted by terminal #3 of 902_3" are Figure 15A 、 Figure 15B structure.

[0432] At this time, it is assumed that the base station #1 of 901_1 "receives the 'sector scanning reference signal' 1401_2 for terminal #2 sent by terminal #2 of 902_2, and the reception quality of 'the transmitting panel antenna and beamforming parameters of terminal #2 of 902_2 is good'" and the base station #1 of 901_1 "receives the 'sector scanning reference signal' 1401_3 for terminal #3 sent by terminal #3 of 902_3, and the reception quality of 'the transmitting panel antenna and beamforming parameters of terminal #3 of 902_3 is good'" interfere with each other.

[0433] <Example 2-1>

[0434] Base station #1 at 901_1 may obtain either information included in "terminal #2's sector-scanning reference signal '1401_2' transmitted by terminal #2 at 902_2" or information included in "terminal #3's sector-scanning reference signal '1401_3' transmitted by terminal #3 at 902_3."

[0435] For example, it is assumed that the base station #1 at 901_1 obtains information included in "the terminal #2's sector scanning reference signal '1401_2' transmitted by the terminal #2 at 902_2."

[0436] In this case, for example, Figure 16A In the “Frequency The feedback signal second transmission interval 1601_12 is set as a signal sent to terminal #2 in 902_2.

[0437] In this case, for example, Figure 17A In the “Frequency The second transmission interval 1701_12 is set to be a signal sent to terminal #2 in 902_2 using the modulated signal (time slot).

[0438] As a result, base station #1 of 901_1 can communicate with (terminal #1 of 902_1) and terminal #2 of 902_2.

[0439] The operation of terminal #3 of 902_3 is described.

[0440] Set as Figure 18 The sector scan reference signal 1851_1 is in Figure 21A 、 Figure 21B That state. Therefore, in Figure 18 Among 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.

[0441] In this case, Figure 9 Terminal #3 of 902_3 can receive the signal sent by base station #1 of 901_1. Figure 19 The sector scan uses reference signal 1801_2, and obtains the "frequency (band)" with good reception quality, "ID (identification) of the transmitting panel antenna" and "identification (ID) of the parameters used for beamforming (directional control)", and communicates with the base station #1 of 901_1.

[0442] Assume that terminal #3 of 902_3 estimates the frequency band As the "frequency (band)" with good reception quality, for example, "transmitting panel antenna a3 and parameters b3" are estimated as the "transmitting panel antenna and parameters" with good reception quality.

[0443] Furthermore, while performing these estimates, terminal #3 in 902_3 obtains information regarding the "number of time divisions in which the terminal can transmit the sector scanning reference signal." Terminal #3 in 902_3 obtains information indicating that the number of time divisions in which the terminal can transmit the sector scanning reference signal is 4.

[0444] In this case, the terminal #3 of 902_3 uses the random number to obtain a value such as "0", "1", "2", or "3". For example, suppose the terminal #3 of 902_3 uses a different seed than the previous one to generate a random number and obtains "3". In this case, since "3" + 1 = 4, the terminal #3 of 902_3 is Figure 22A As shown, the frequency band used The terminal transmits the “sector scan reference signal” 1401_3 of terminal #3 in the fourth transmission interval 1301_4 of the “sector scan reference signal”.

[0445] Furthermore, it is assumed that the "sector scanning reference signal" 1401_3 of terminal #3 includes information on the "transmitting panel antenna and parameters" with good reception quality obtained by terminal #3 at 902_3, that is, information on the "transmitting panel antenna a3 and parameters b3".

[0446] At this time, if Figure 22A As shown, base station #1 at 901_1 receives "terminal #3 'sector scanning reference signal' 1401_3 transmitted by terminal #3 at 902_3", and then performs the aforementioned predetermined process, and base station #1 at 901_1 communicates with terminal #3 at 902_3.

[0447] As another example, it is assumed that terminal #3 of 902_3 estimates the frequency band As the "frequency (band)" with good reception quality, for example, "transmitting panel antenna a3 and parameters b3" are estimated as the "transmitting panel antenna and parameters" with good reception quality.

[0448] At this time, if Figure 22B As shown, the base station #1 of 901_1 receives the "terminal #3's 'sector scanning reference signal' 1401_3 transmitted by the terminal #3 of 902_3", and then performs the aforementioned predetermined process, and the base station #1 of 901_1 communicates with the terminal #3 of 902_3. In addition, this is because "this can avoid the terminal #3's 'sector scanning reference signal' 1401_3 and the terminal #3 of 902_3 from being interrupted by the signal." Figure 21A The "sector scanning reference signal" 1401_2 of terminal #2 sent by terminal #2 of 902_2 causes interference.

[0449] <Example 2-2>

[0450] Sometimes, base station #1 at 901_1 cannot obtain both information included in "terminal #2's sector-scanning reference signal '1401_2' transmitted by terminal #2 at 902_2" and information included in "terminal #3's sector-scanning reference signal '1401_3' transmitted by terminal #3 at 902_3."

[0451] Set as Figure 18 The sector scan reference signal 1851_1 is in Figure 21A 、 Figure 21B In such a state, the base station #1 of 901_1 cannot obtain either the information contained in the "terminal #2' sector scanning reference signal '1401_2' transmitted by the terminal #2 of 902_2" or the information contained in the "terminal #3' sector scanning reference signal '1401_3' transmitted by the terminal #3 of 902_3". Figure 18 In frames 1803_1, 1803_2, and 1803_3 containing data symbols, there are no frames (time slots) addressed to terminal #2 of 902_2 or frames (time slots) addressed to terminal #3 of 902_3.

[0452] In this case, Figure 9 Terminal #2 of 902_2 can receive the signal sent by base station #1 of 901_1. Figure 19 The sector scan uses reference signal 1801_2, and obtains the "frequency (band)" with good reception quality, "ID (identification) of the transmitting panel antenna" and "identification (ID) of the parameters used for beamforming (directional control)", and communicates with the base station #1 of 901_1.

[0453] Assume that terminal #2 of 902_2 estimates the frequency band As the "frequency (band)" with good reception quality, for example, the "transmitting panel antenna a2 and parameters b2" are estimated as the "transmitting panel antenna and parameters" with good reception quality.

[0454] Furthermore, while performing these estimates, terminal #2 in 902_2 obtains information regarding the number of time divisions during which the terminal can transmit the sector scanning reference signal. Terminal #2 in 902_2 obtains information indicating that the number of time divisions during which the terminal can transmit the sector scanning reference signal is four.

[0455] In this case, the terminal #2 of 902_2 uses the random number to obtain a value such as "0", "1", "2", or "3". For example, suppose the terminal #2 of 902_2 uses a different seed than the previous one to generate a random number and obtains "2". In this case, since "2" + 1 = 3, the terminal #2 of 902_2 is Figure 21A As shown, the frequency band used The “terminal uses the sector scan reference signal” third transmission interval 1301_3 to transmit the terminal #2 “sector scan reference signal” 1401_2.

[0456] Furthermore, it is assumed that the "sector scanning reference signal" 1401_2 of terminal #2 includes information on the "transmitting panel antenna and parameters" with good reception quality obtained by terminal #2 at 902_2, that is, information on the "transmitting panel antenna a2 and parameters b3".

[0457] At this time, if Figure 21A As shown, base station #1 at 901_1 receives "terminal #2's sector scanning reference signal 1401_2 transmitted by terminal #2 at 902_2", and then performs the aforementioned predetermined process, and base station #1 at 901_1 communicates with terminal #2 at 902_2.

[0458] Likewise, Figure 9 Terminal #3 of 902_3 can receive the signal sent by base station #1 of 901_1. Figure 19 The sector scan uses reference signal 1801_2, and obtains the "frequency (band)" with good reception quality, "ID (identification) of the transmitting panel antenna" and "identification (ID) of the parameters used for beamforming (directional control)", and communicates with the base station #1 of 901_1.

[0459] Assume that terminal #3 of 902_3 estimates the frequency band As the "frequency (band)" with good reception quality, for example, "transmitting panel antenna a3 and parameters b3" are estimated as the "transmitting panel antenna and parameters" with good reception quality.

[0460] Furthermore, while performing these estimates, terminal #3 in 902_3 obtains information regarding the "number of time divisions in which the terminal can transmit the sector scanning reference signal." Terminal #3 in 902_3 obtains information indicating that the number of time divisions in which the terminal can transmit the sector scanning reference signal is 4.

[0461] In this case, the terminal #3 of 902_3 uses the random number to obtain a value such as "0", "1", "2", or "3". For example, suppose the terminal #3 of 902_3 uses a different seed than the previous one to generate a random number and obtains "3". In this case, since "3" + 1 = 4, the terminal #3 of 902_3 is Figure 22A As shown, the frequency band used The “terminal uses the sector scan reference signal” fourth transmission interval 1301_4 to transmit the terminal #3 “sector scan reference signal” 1401_3.

[0462] Furthermore, it is assumed that the "sector scanning reference signal" 1401_3 of terminal #3 includes information on the "transmitting panel antenna and parameters" with good reception quality obtained by terminal #3 at 902_3, that is, information on the "transmitting panel antenna a3 and parameters b3".

[0463] At this time, if Figure 22A As shown, base station #1 at 901_1 receives "terminal #3 'sector scanning reference signal' 1401_3 transmitted by terminal #3 at 902_3", and then performs the aforementioned predetermined process, and base station #1 at 901_1 communicates with terminal #3 at 902_3.

[0464] As another example, it is assumed that terminal #3 of 902_3 estimates the frequency band As the "frequency (band)" with good reception quality, for example, "transmitting panel antenna a3 and parameters b3" are estimated as the "transmitting panel antenna and parameters" with good reception quality.

[0465] At this time, if Figure 22B As shown, the base station #1 of 901_1 receives the "terminal #3's 'sector scanning reference signal' 1401_3 transmitted by the terminal #3 of 902_3", and then performs the aforementioned predetermined process, and the base station #1 of 901_1 communicates with the terminal #3 of 902_3. In addition, this is because "this can avoid the terminal #3's 'sector scanning reference signal' 1401_3 and the terminal #3 of 902_3 from being interrupted by the signal." Figure 21A The "sector scanning reference signal" 1401_2 of terminal #2 sent by terminal #2 of 902_2 causes interference.

[0466] This can further reduce conflicts among sector scanning reference signals sent by each terminal, thereby increasing the number of sector scanning reference signals that the base station can receive, thereby increasing the number of terminals communicating with the base station.

[0467] As described above in the first embodiment, the terminal transmits a reference signal for sector scanning in such a manner as to reduce the number of collisions, thereby achieving the following effect: improving the communication capacity of the system composed of the base station and the terminal. Figure 1A 、 Figure 1B 、 Figure 1C In addition, the structure of the transmitting panel antenna and the receiving panel antenna is not limited to Figure 3 、 Figure 4 For example, any structure that can generate one or more antennas with transmission directivity and reception directivity is sufficient. Figure 10 、 Figure 11 、 Figure 12 、 Figure 13 、 Figure 14 、 Figure 15A 、 Figure 15B 、 Figure 16A 、 Figure 16B 、 Figure 17A 、 Figure 17B 、 Figure 18 、 Figure 19 、 Figure 20A 、 Figure 20B 、 Figure 20C 、 Figure 20D 、 Figure 20E 、 Figure 20F 、 Figure 21A 、 Figure 21B 、 Figure 22A 、 Figure 22B There are signals, frames, etc. in it, but the names are not limited to these. What is important is the function of the signal itself that is sent.

[0468] (Implementation Method 2)

[0469] In this embodiment 2, an example in which a terminal performs single-carrier transmission will be described as a modification of embodiment 1. In the following description of embodiment 2, figures shown in embodiment 1 may be referenced for description.

[0470] Figure 1A 、 Figure 1B 、 Figure 1C This is an example of the structure of a base station, access point, terminal, and repeater in this embodiment 2. The details of the operation have been used. Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 Therefore, the description is omitted. Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 , the details of the action have been explained, so the description is omitted.

[0471] Figure 9 An example of the communication state of this embodiment is shown. Figure 9 As shown, consider a case where base station #1 at 901_1 communicates with terminal #1 at 902_1, terminal #2 at 902_2, terminal #3 at 902_3, terminal #4 at 902_4, terminal #5 at 902_5, and terminal #6 at 902_6. However, the relationship between base stations and terminals is not limited to this example; for example, a base station may communicate with more than one terminal.

[0472] In addition, the following description is made by taking as an example a case where the base station transmits a modulated signal to the terminal using an OFDMA method and the terminal transmits a modulated signal to the base station using a single carrier method.

[0473] Figure 10 Shown Figure 9 Example of modulated signal 1000 transmitted by base station #1 of 901_1. Figure 10 In FIG. 1 , the horizontal axis represents time and the vertical axis represents frequency. In the time interval from time t0 to time t1, a sector sweep reference signal 1001 exists. The sector sweep reference signal 1001 will be described later.

[0474] The time interval from time t1 to time t2 is the terminal response interval. In addition, the terminal response will be described later.

[0475] In the time interval from time t2 to time t3, there is a feedback signal 1002. In addition, the feedback signal 1002 will be described later.

[0476] In the time interval from time t4 to time t5, there is a frame 1003 including data symbols. Frame 1003 including data symbols will be described later.

[0477] exist Figure 10In the text, although it is referred to as "sector scanning reference signal 1001," the term is not limited to this and may also be referred to as "reference signal," "reference symbol," "training signal," "training symbol," "reference signal," "reference symbol," etc. Furthermore, although it is referred to as "feedback signal 1002," the term is not limited to this and may also be referred to as "feedback symbol," "signal sent to the terminal," "symbol sent to the terminal," "control signal," "control symbol," etc. Furthermore, although it is referred to as "frame containing data symbols 1003," the term is not limited to this and may also be referred to as "frame," "time slot," "mini-time slot," "unit," etc.

[0478] Figure 11 For example, it is shown that Figure 1A 、 Figure 1B 、 Figure 1C structure Figure 9 The 901_1 base station #1 sends Figure 10 An example of a sector scanning reference signal 1001. Figure 11 In , the horizontal axis is time and the vertical axis is frequency. Figure 11 In the example, it is assumed that the base station #1 of 901_1 sends a modulated signal based on OFDMA, such as Figure 11 As shown, divided into frequency bands frequency band frequency band In addition, it is assumed that K is an integer greater than or equal to 1 or an integer greater than or equal to 2.

[0479] And, for example, in the frequency band In the first time interval, there is a frequency The sector scanning reference signal 1101_11 in the transmitting panel antenna 1 is used, and there is a frequency in the second time interval. Using the sector scanning reference signal 1101_12 in the transmitting panel antenna 2, ..., there is a frequency in the Mth time interval. The reference signal 1101_1M is used for sector scanning in the transmitting panel antenna M.

[0480] Therefore, in the frequency band In the first time interval, there is a frequency The sector scanning reference signal 1101_i1 in the transmission panel antenna 1 is used, and the frequency exists in the second time interval. The sector scanning reference signal 1101_i2, ..., in the transmitting panel antenna 2 exists a frequency in the Mth time interval. The sector scanning reference signal 1101_iM is transmitted in the panel antenna M. Here, i is an integer greater than or equal to 1 and less than or equal to K.

[0481] In addition, the frequency The reference signal 1101_ij used to scan the sector of the transmitting panel antenna j will be Figure 1A 、 Figure 1B 、 Figure 1C The transmission panel antenna j of the base station #1 of the configuration 901_1 transmits. In this case, j is an integer greater than or equal to 1 and less than or equal to M.

[0482] “ Figure 11 A characteristic of the present invention is that, in the i-th time interval, a sector scanning reference signal is transmitted from the same transmitting panel antenna regardless of the frequency band. At this time, in the first time band, the same beamforming parameters are used regardless of the frequency band. Beamforming will be described later.

[0483] Figure 12 Shown Figure 11 The frequency An example of a structure in which a reference signal 1101_pi is used to scan a sector of a transmitting panel antenna i. Figure 12 In the example, the horizontal axis represents time. In addition, P is an integer greater than or equal to 1 and less than or equal to K, and i is an integer greater than or equal to 1 and less than or equal to M.

[0484] For those with Figure 1A 、 Figure 1B 、 Figure 1C The structure of 901_1 is sent by base station #1 Figure 11 、 Figure 12 The frequency A specific example of a method for transmitting the sector scanning reference signal 1101_pi" using the transmitting panel antenna i has been described, and therefore its description is omitted.

[0485] Set as Figure 11 、 Figure 12 As shown, the base station #1 at 901_1 sends "frequency When the reference signal 1101_i is used to scan the sector of the transmitting panel antenna i, the frequency The reference signal 1201_j" using the jth parameter in the transmitting panel antenna i includes, for example, the following information.

[0486] The ID (identification number) of the transmitting panel antenna (here, for example, equivalent to i)

[0487] Identification number (ID) of the parameter used for beamforming (directivity control) (here, for example, equivalent to j)

[0488] When the terminal transmits a reference signal for sector scanning, the number of time divisions in which the reference signal for sector scanning can be transmitted (this will be described later).

[0489] In addition, the frequency The reference signal 1201_j" using the jth parameter in the transmitting panel antenna i may include the following information.

[0490] · With band and / or frequency Related information (may also include information on the number of frequency divisions) (This will be described later.)

[0491] Send "Frequency" via base station #1 of 901_1 By using the ID (identification) of the transmitting panel antenna and the identification number (ID) of the parameters used for beamforming (directional control), the terminal can know the received "ID (identification) of the transmitting panel antenna" and the identification number (ID) of the parameters used for beamforming (directional control), and the base station #1 and the terminal of 901_1 can perform appropriate control, thereby achieving the effect of improving the data reception quality.

[0492] Furthermore, the number of time divisions in which a terminal can transmit a sector sweep reference signal may be changed according to frames and / or time, etc. This can improve the data transmission efficiency of the communication system.

[0493] In addition, the base station #1 of 901_1 sends "with frequency band and / or frequency The terminal obtains the information and sends the "related information of the frequency that the base station wants to send" to the base station. As a result, the base station can perform appropriate control and improve the reception quality of data.

[0494] Next, explain Figure 10 The terminal response interval in the second embodiment is the time interval from time t1 to time t2. In addition, in this embodiment 2, the case where the terminal transmits a signal using a single carrier method and the frequencies (frequency bands) used by the base station and the frequencies (frequency bands) used by the terminal have some common frequencies (frequency bands) is described as an example.

[0495] Figure 23 The example of the operation in the time interval from time t1 to time t2, which is the terminal response interval, is shown. Figure 23 In the example, the horizontal axis is time. Figure 9 Terminals 902_1, 902_2, 902_3, 902_4, 902_5, 902_6, and 902_6 transmit sector scanning reference signals in the terminal response interval, i.e., the time interval from time t1 to time t2. Figure 23In the Figure 10 、 Figure 13 The same reference numerals are attached to parts that operate in the same manner.

[0496] Set as Figure 10 、 Figure 23 As shown, for example, base station #1 of 901_1 transmits a sector scanning reference signal in the time interval from time t0 to time t1. Then, assume that in the time interval from time t1 to time t2, i.e., the terminal response interval, as shown in FIG. Figure 13 In this way, there is the first sending interval 1301_1 of the "reference signal for sector scanning" used by the terminal, the second sending interval 1301_2 of the "reference signal for sector scanning" used by the terminal, the third sending interval 1301_3 of the "reference signal for sector scanning" used by the terminal, the fourth sending interval 1301_4 of the "reference signal for sector scanning" used by the terminal, the fifth sending interval 1301_5 of the "reference signal for sector scanning" used by the terminal, the sixth sending interval 1301_6 of the "reference signal for sector scanning" used by the terminal, the seventh sending interval 1301_7 of the "reference signal for sector scanning" used by the terminal, and the eighth sending interval 1301_8 of the "reference signal for sector scanning" used by the terminal.

[0497] Therefore, in Figure 23 In the example, the base station #1 of 901_1 sets the "time division number for transmitting the reference signal for sector scanning when the terminal transmits the reference signal for sector scanning" to 8.

[0498] Figure 24 Shown with Figure 23 The examples shown are related to the occupancy of the terminal in the first transmission interval 1301_1 of the "sector scanning reference signal" for the terminal, the second transmission interval 1301_2 of the "sector scanning reference signal" for the terminal, the third transmission interval 1301_3 of the "sector scanning reference signal" for the terminal, the fourth transmission interval 1301_4 of the "sector scanning reference signal" for the terminal, the fifth transmission interval 1301_5 of the "sector scanning reference signal" for the terminal, the sixth transmission interval 1301_6 of the "sector scanning reference signal" for the terminal, the seventh transmission interval 1301_7 of the "sector scanning reference signal" for the terminal, and the eighth transmission interval 1301_8 of the "sector scanning reference signal" for the terminal. In addition, Figure 24 In the example, the horizontal axis is time.

[0499] Figure 9Terminal #1 of 902_1 receives the sector scanning reference signal 1001 transmitted by base station #1 of 901_1 and estimates the “frequency band, transmission panel antenna and parameter number” with good reception quality among the transmission panel antennas of base station #1 of 901_1. In addition, the estimation can be performed by obtaining the sector scanning 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)” contained in the sector scanning reference signal 1001. In addition, the “frequency band and / or frequency” contained in the sector scanning reference signal 1001 can also be used. Related information".

[0500] Assume that, for example, terminal #1 of 902_1 estimates "transmitting panel antenna a1 and parameter b1" as the "transmitting panel antenna and parameter" with good reception quality. Also, assume that terminal #1 of 902_1 sets the frequency band This is the frequency area where reception quality is estimated to be good.

[0501] In addition, terminal #1 of 902_1 estimates the "transmitting panel antenna and parameters" with good reception quality and obtains information on the "number of time divisions in which the terminal can transmit the reference signal for sector scanning when transmitting the reference signal for sector scanning." Figure 24 In the example, terminal #1 of 902_1 obtains the information that "when the terminal transmits a reference signal for sector scanning, the number of time divisions in which the reference signal for sector scanning can be transmitted" is 8.

[0502] In this case, terminal #1 of 902_1 uses a random number to obtain a value such as "0", "1", "2", "3", "4", "5", "6", or "7". For example, suppose terminal #1 of 902_1 obtains "0" using a random number. In this case, since "0" + 1 = 1, terminal #1 of 902_1 uses Figure 24 Terminal #1 transmits "sector scanning reference signal" 2401_1 using "terminal-used 'sector scanning reference signal' first (='0'+1) transmission interval 1301_1." While random numbers are used here to set the sector scanning reference signal transmission interval, random numbers such as integers or natural numbers, irregular integers or natural numbers, regular integers or natural numbers, or integers or natural numbers reserved for terminal use may also be used instead of random numbers. Therefore, the setting of the sector scanning reference signal transmission interval is not limited to the above example; for example, the sector scanning reference signal transmission interval may be set for each terminal. This also applies to the following description.

[0503] Furthermore, it is assumed that the "sector scan reference signal" 2401_1 of terminal #1 includes information on the "transmitting panel antenna and parameters" with good reception quality obtained by terminal #1 at 902_1, that is, information on "transmitting panel antenna a1 and parameter b1". Furthermore, it is assumed that the "sector scan reference signal" 2401_1 of terminal #1 includes information on the "frequency region", that is, for example, "frequency band". "This information will be explained later.

[0504] Likewise, Figure 9 Terminal #2 of 902_2 receives the sector scanning reference signal 1001 sent by base station #1 of 901_1 and estimates the “frequency band, transmission panel antenna and parameter number” with good reception quality among the transmission panel antennas of base station #1 of 901_1. In addition, the estimation can be performed by obtaining the sector scanning 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)” contained in the sector scanning reference signal 1001. In addition, the “frequency band and / or frequency” contained in the sector scanning reference signal 1001 can also be used. Related information".

[0505] Assume that, for example, terminal #2 of 902_2 estimates "transmitting panel antenna a2 and parameter b2" as the "transmitting panel antenna and parameter" with good reception quality. Also, assume that terminal #2 of 902_2 sets the frequency band This is the frequency area where reception quality is estimated to be good.

[0506] In addition, terminal #2 of 902_2 estimates the "transmitting panel antenna and parameters" with good reception quality, and obtains information on the "number of time divisions in which the reference signal for sector scanning can be sent when the terminal sends the reference signal for sector scanning." Figure 24 In the example, terminal #2 of 902_2 obtains the information that "when the terminal transmits a reference signal for sector scanning, the number of time divisions in which the reference signal for sector scanning can be transmitted" is 8.

[0507] In this case, the terminal #2 of 902_2 uses a random number to obtain a value such as "0", "1", "2", "3", "4", "5", "6", or "7". For example, suppose the terminal #2 of 902_2 obtains "5" using a random number. In this case, since "5" + 1 = 6, the terminal #2 of 902_2 uses Figure 24 The “sector scan reference signal” 2401_2 for terminal #2 is transmitted in the “sixth (= '5' + 1) transmission interval 1301_6 of the terminal 'sector scan reference signal'”.

[0508] Furthermore, it is assumed that the "sector scan reference signal" 1401_2 of terminal #2 includes information on the "transmitting panel antenna and parameters" with good reception quality obtained by terminal #2 at 902_2, that is, information on "transmitting panel antenna a2 and parameters b2". Furthermore, the "sector scan reference signal" 2401_2 of terminal #2 may also include information on "frequency region", that is, for example, "frequency band". "This information will be explained later.

[0509] Therefore, terminal #i of 902_i receives the sector scanning reference signal 1001 transmitted by base station #1 of 901_1 and estimates the "frequency band, transmission panel antenna and parameter number" with good reception quality among the transmission panel antennas of base station #1 of 901_1. In addition, the estimation can be performed by obtaining the sector scanning 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)" contained in the sector scanning reference signal 1001. In addition, for example, i is set to an integer greater than 1. In addition, the "frequency band and / or frequency" contained in the sector scanning reference signal 1001 can also be used. Related information".

[0510] Assume that, for example, terminal #i of 902_i estimates "transmitting panel antenna ai and parameters bi" as "transmitting panel antenna and parameters" with good reception quality. Also, assume that terminal #i of 902_i sets the frequency band This is the frequency area where reception quality is estimated to be good.

[0511] In addition, terminal #i of 902_i estimates the "transmitting panel antenna and parameters" with good reception quality and obtains information on the "number of time divisions in which the terminal can transmit the reference signal for sector scanning when transmitting the reference signal for sector scanning." Figure 24 In the example, terminal #i of 902_i obtains the information that "when the terminal transmits a reference signal for sector scanning, the number of time divisions in which the reference signal for sector scanning can be transmitted" is 8.

[0512] In this case, the terminal #i of 902_i uses a random number to obtain a value such as "0", "1", "2", "3", "4", "5", "6", or "7". For example, it is assumed that the terminal #i of 902_i obtains "yi" using a random number. In addition, yi is a value such as "0", "1", "2", "3", "4", "5", "6", or "7". In this case, the terminal #i of 902_i uses Figure 24The terminal uses the ("yi"+1)th sending interval 1301_("yi"+1) of the "sector scanning reference signal" to send terminal #i the "sector scanning reference signal" 2401_i.

[0513] Furthermore, it is assumed that the “sector scanning reference signal” 2401_i of terminal #i includes information on the “transmitting panel antenna and parameters” of the terminal #i with good reception quality, that is, information on the “transmitting panel antenna ai and parameters bi”. Furthermore, it is assumed that the “sector scanning reference signal” 2401_i of terminal #i may also include information on the “frequency region”, that is, for example, “frequency band”. "This information will be explained later.

[0514] In addition, Figure 24 In the first method, regardless of i, "sector scan reference signal" 2401_i of terminal #i may use the first frequency (frequency band). In this case, "sector scan reference signal" 2401_i of terminal #i is time-divided (time division multiple access: TDMA). This is because the terminal transmits the modulated signal using a single carrier.

[0515] As a second method, there is a method in which the "sector scan reference signal" 2401_i of the terminal #i does not necessarily use the same frequency (frequency band).

[0516] Both the first method and the second method can achieve the effect of reducing interference with the sector-scanning reference signal ' 2401_i' of the terminal #i.

[0517] For example, a method can be considered in which the base station #1 of 901_1 uses the "frequency band" as described in the first embodiment. To frequency band ” When sending a modulated signal, terminal #i of 902_i uses “frequency band To frequency band " is a method of transmitting a modulated signal in a single-carrier mode.

[0518] As another method, the following method can be considered: as described in the first embodiment, the base station #1 of 901_1 uses the "frequency band To frequency band ” When sending a modulated signal, terminal #i of 902_i uses “frequency band To frequency band " is a method of transmitting a modulated signal in a single-carrier mode.

[0519] Alternatively, the base station #1 of 901_1 may use the "frequency band" as described in the first embodiment. To frequency band "Sends a modulated signal, terminal #i of 902_i uses the same frequency band as " To frequency band A method of sending modulated signals at different frequencies (frequency bands).

[0520] This can reduce collisions between sector scanning reference signals sent by each terminal, thereby increasing the number of sector scanning reference signals that can be received by the base station, thereby increasing the number of terminals communicating with the base station.

[0521] For used Figure 24 The structure of the terminal #i "sector scanning reference signal" 2401_i transmitted by the terminal #i of 902_i 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 In addition, let Figure 1A 、 Figure 1B 、 Figure 1C The terminal #i of the structure 902_i has Figure 3 However, the structure of the terminal #i of 902_i is not limited to Figure 1A 、 Figure 1B 、 Figure 1C The structure, in addition, has Figure 1A 、 Figure 1B 、 Figure 1C The structure of the transmitting panel antenna xi of the terminal #i 106_xi of the structure 902_i is not limited to Figure 3 .

[0522] In addition, the difference from the first embodiment is that the terminal #i of 902_i transmits a modulated signal of a single carrier method. The specific structure has been described in the first embodiment.

[0523] like Figure 24 As shown, terminal #i at 902_i transmits terminal #i "sector scanning reference signal" 2401_i. Figure 15A An example of the structure of the "sector scanning reference signal" 2401_i of terminal #i is shown. Figure 15A In the example, the horizontal axis is time. Figure 15A The "terminal #i' sector scanning reference signal '1401_i'" is equivalent to Figure 24 An example of the “sector scanning reference signal” 2401_i.

[0524] Set as Figure 15A As shown, the "sector scanning reference signal" 2401_i of terminal #i 902_i is composed of "sector scanning reference signal 1501_1 in the transmitting panel antenna 1 of terminal #i, sector scanning reference signal 1501_2 in the transmitting panel antenna 2 of terminal #i, ..., sector scanning reference signal 1501_M in the transmitting panel antenna M of terminal #i".

[0525] For example, with Figure 1A 、 Figure 1B 、 Figure 1C Terminal #i of the structure 902_i uses the transmitting panel antenna 1 of 106_1 to transmit the "reference signal 1501_1 for sector scanning in the transmitting panel antenna 1 of terminal #i".

[0526] Therefore, having Figure 1A 、 Figure 1B 、 Figure 1C Terminal #i of the configuration 902_i transmits "sector scanning reference signal 1501_k at transmitting panel antenna k of terminal #i" using transmitting panel antenna k of 106_k. Note that k is an integer greater than or equal to 1 and less than or equal to M.

[0527] In addition, Figure 15A In the example, the number of transmission panel antennas of terminal #i of 902_i is set to M, but the present invention is not limited thereto and the number of transmission panel antennas may be set to N. (Assume that N is an integer greater than or equal to 1.)

[0528] Figure 15B Show Figure 15A An example of the structure of "sector scanning reference signal 1501_xi for transmitting panel antenna xi of terminal #i". In FIG15 , the horizontal axis is assumed to be time.

[0529] Set as Figure 15B As shown, the “reference signal 1501_xi for sector scanning in the transmitting panel antenna xi of terminal #i” is composed of, for example, “the reference signal 1511_1 using the first parameter in the transmitting panel antenna xi”, “the reference signal 1511_2 using the second parameter in the transmitting panel antenna xi”, “the reference signal 1511_3 using the third parameter in the transmitting panel antenna xi”, and “the reference signal 1511_4 using the fourth parameter in the transmitting panel antenna xi”.

[0530] And, for example, let us have Figure 1A 、 Figure 1B 、 Figure 1C The terminal #i of the structure 902_i has Figure 3 The structure serves as the transmitting panel antenna xi of 106_xi.

[0531] The “reference signal 1511_1 using the first parameter in the transmission panel antenna xi” will be described.

[0532] Send at terminal #i of 902_i Figure 15B When transmitting the reference signal 1511_1 using the first parameter from the transmission panel antenna xi, terminal #i at 902_i sets the multiplication coefficient of the multiplication unit 304_1 at the transmission panel antenna xi of 106_xi to w1(xi,1). If the first transmission signal 303_1 in the reference signal 1511_1 using the first parameter from the transmission panel antenna xi is tx1ref1(t), the multiplication unit 304_1 obtains tx1ref1(t)×w1(xi,1). Then, terminal #i at 902_i sets the multiplication coefficient of the multiplication unit 304_1 at the transmission panel antenna xi of 106_xi to w1(xi,1). Figure 3 Antenna 306_1 transmits tx1ref1(t)×w1(xi,1). In addition, t is time.

[0533] Send at terminal #i of 902_i Figure 15B When transmitting the reference signal 1511_1 using the first parameter from the transmission panel antenna xi, terminal #i at 902_i sets the multiplication coefficient of the multiplication unit 304_2 at the transmission panel antenna xi of 106_xi to w2(xi,1). If the second transmission signal 303_2 in the reference signal 1511_1 using the first parameter from the transmission panel antenna xi is set to tx2ref1(t), the multiplication unit 304_2 obtains tx2ref1(t)×w2(xi,1). Then, terminal #i at 902_i sets the multiplication coefficient of the multiplication unit 304_2 at the transmission panel antenna xi of 106_xi to w2(xi,1). Figure 3 Antenna 306_2 transmits tx2ref1(t)×w2(xi,1).

[0534] Send at terminal #i of 902_i Figure 15B When transmitting the reference signal 1511_1 using the first parameter from the transmission panel antenna xi, terminal #i at 902_i sets the multiplication coefficient of the multiplication unit 304_3 at the transmission panel antenna xi of 106_xi to w3(xi,1). If the third transmission signal 303_3 in the reference signal 1511_1 using the first parameter from the transmission panel antenna xi is set to tx3ref1(t), the multiplication unit 304_3 obtains tx3ref1(t)×w3(xi,1). Then, terminal #i at 902_i sets the multiplication coefficient of the multiplication unit 304_3 at the transmission panel antenna xi of 106_xi to w3(xi,1). Figure 3 Antenna 306_3 transmits tx3ref1(t)×w3(xi,1).

[0535] Send at terminal #i of 902_i Figure 15BWhen transmitting the reference signal 1511_1 using the first parameter from the transmission panel antenna xi, terminal #i at 902_i sets the multiplication coefficient of the multiplication unit 304_4 at the transmission panel antenna xi of 106_xi to w4(xi,1). If the fourth transmission signal 303_4 in the reference signal 1511_1 using the first parameter from the transmission panel antenna xi is set to tx4ref1(t), the multiplication unit 304_4 obtains tx4ref1(t)×w4(xi,1). Then, terminal #i at 902_i sets the multiplication coefficient of the multiplication unit 304_4 at the transmission panel antenna xi of 106_xi to w4(xi,1). Figure 3 Antenna 306_4 transmits tx4ref1(t)×w4(xi,1).

[0536] The “reference signal 1511_j using the j-th parameter in the transmission panel antenna xi” will be described.

[0537] Send at terminal #i of 902_i Figure 15B When transmitting the reference signal 1511_j using the jth parameter from the transmission panel antenna xi, terminal #i at 902_i sets the multiplication coefficient of the multiplication unit 304_1 at the transmission panel antenna xi at 106_xi to w1(xi,j). If the first transmission signal 303_1 in the reference signal 1511_j using the jth parameter from the transmission panel antenna xi is tx1refj(t), the multiplication unit 304_1 obtains tx1refj(t)×w1(xi,j). Next, terminal #i at 902_i sets the multiplication coefficient of the multiplication unit 304_1 at the transmission panel antenna xi at 106_xi to w1(xi,j). Figure 3 Antenna 306_1 transmits tx1refj(t)×w1(xi,j). In addition, t is time.

[0538] Send at terminal #i of 902_i Figure 15B When transmitting the reference signal 1511_j using the jth parameter from the transmission panel antenna xi, terminal #i at 902_i sets the multiplication coefficient of the multiplication unit 304_2 at the transmission panel antenna xi at 106_xi to w2(xi,j). If the second transmission signal 303_2 in the reference signal 1511_j using the jth parameter from the transmission panel antenna xi is tx2refj(t), the multiplication unit 304_2 obtains tx2refj(t)×w2(xi,j). Then, terminal #i at 902_i sets the multiplication coefficient of the multiplication unit 304_2 at the transmission panel antenna xi at 106_xi to w2(xi,j). Figure 3 Antenna 306_2 transmits tx2refj(t)×w2(xi,j).

[0539] Send at terminal #i of 902_i Figure 15BWhen transmitting the reference signal 1511_j using the jth parameter from the transmission panel antenna xi, terminal #i at 902_i sets the multiplication coefficient of the multiplication unit 304_3 at the transmission panel antenna xi at 106_xi to w3(xi,j). If the third transmission signal 303_3 in the reference signal 1511_j using the jth parameter from the transmission panel antenna xi is tx3refj(t), the multiplication unit 304_3 obtains tx3refj(t)×w3(xi,j). Next, terminal #i at 902_i sets the multiplication coefficient of the multiplication unit 304_3 at the transmission panel antenna xi at 106_xi to w3(xi,j). Figure 3 Antenna 306_3 transmits tx3refj(t)×w3(xi,j).

[0540] Send at terminal #i of 902_i Figure 15B When transmitting the reference signal 1511_j using the jth parameter from the transmission panel antenna xi, terminal #i at 902_i sets the multiplication coefficient of the multiplication unit 304_4 at the transmission panel antenna xi at 106_xi to w4(xi,j). If the fourth transmission signal 303_4 in the reference signal 1511_j using the jth parameter from the transmission panel antenna xi is tx4refj(t), the multiplication unit 304_4 obtains tx4refj(t)×w4(xi,j). Next, terminal #i at 902_i sets the multiplication coefficient of the multiplication unit 304_4 at the transmission panel antenna xi at 106_xi to w4(xi,j). Figure 3 Antenna 306_4 transmits tx4refj(t)×w4(xi,j).

[0541] in addition, Figure 15B In the equation ( ), j is an integer greater than or equal to 1 and less than or equal to 4. Figure 15B In the example, the number of parameter changes Z is set to Z=4, but the number of parameter changes Z is not limited to 4. The same implementation can be performed as long as Z is an integer greater than 1 or an integer greater than 2. In this case, j is an integer greater than 1 and less than Z.

[0542] Set as Figure 24 、 Figure 15A 、 Figure 15B As shown, when terminal #i at 902_i transmits "reference signal 1501_xi for sector scanning in transmitting panel antenna xi of terminal #i", "reference signal 1511_j using j-th parameter in transmitting panel antenna xi" includes the following information, for example.

[0543] Information on the "transmitting panel antenna and parameters" of base station #1 of 901_1 with good reception quality as described above.

[0544] Therefore, terminal #i of 902_i is Figure 15AThe "reference signal 1501_1 for sector scanning in the transmitting panel antenna 1 of terminal #i", "reference signal 1501_2 for sector scanning in the transmitting panel antenna 2 of terminal #i", ..., "reference signal 1501_M for sector scanning in the transmitting panel antenna M of terminal #i" sends "information on the 'transmitting panel antenna and parameters' of base station #1 with good reception quality 901_1".

[0545] In addition, in the Figure 15A 'Sector scanning reference signal 1501_1 for transmitting panel antenna 1 of terminal #i', 'sector scanning reference signal 1501_2 for transmitting panel antenna 2 of terminal #i', ..., 'sector scanning reference signal 1501_M for transmitting panel antenna M of terminal #i'" Figure 15B In the "reference signal 1511_1 using the first parameter in the sending panel antenna xi", "reference signal 1511_2 using the second parameter in the sending panel antenna xi", "reference signal 1511_3 using the third parameter in the sending panel antenna xi", and "reference signal 1511_4 using the fourth parameter in the sending panel antenna xi", the terminal #i of 902_i sends "the information of the 'transmitting panel antenna and parameters' of the base station #1 of 901_1 with good reception quality".

[0546] In this case, for example, even if an omnidirectional antenna is used, the base station #1 of 901_1 can receive the “ Figure 15A The possibility of receiving one of the sector scanning reference signals among the 'sector scanning reference signal 1501_1 in the transmitting panel antenna 1 of terminal #i', 'sector scanning reference signal 1501_2 in the transmitting panel antenna 2 of terminal #i', ..., 'sector scanning reference signal 1501_M in the transmitting panel antenna M of terminal #i'" will also increase. The reason is that the terminal #i of 902_i performs transmission beamforming (directivity control). As a result, the base station #1 of 901_1 can obtain the following: This has the following effect: the likelihood of receiving the "information on the 'transmitting panel antenna and parameters' of base station #1 at 901_1 with good reception quality" transmitted by terminal #i at 902_i increases. Consequently, base station #1 at 901_1 can transmit a modulated signal to terminal #i at 902_i based on the "information on the 'transmitting panel antenna and parameters' of base station #1 at 901_1 with good reception quality," and terminal #i at 902_i can receive the modulated signal with high reception quality.

[0547] In addition, in Figure 24In that case, when reference signals for sector scanning are sent by multiple terminals, base station #1 of 901_1 can obtain the "information of 'transmitting panel antenna and parameters' of base station #1 of 901_1 with good reception quality" of multiple terminals. As a result, the following effect can be obtained, that is, base station #1 of 901_1 can send modulated signals to multiple terminals based on the "information of 'transmitting panel antenna and parameters' of base station #1 of 901_1 with good reception quality" of multiple terminals, and multiple terminals can receive the modulated signals with high reception quality.

[0548] In addition, if Figure 24 、 Figure 15A 、 Figure 15B As shown, when terminal #i of 902_i sends "reference signal 1501_xi for sector scanning in transmitting panel antenna xi of terminal #i", "reference signal 1511_j using jth parameter in transmitting panel antenna xi" can include the following information, for example.

[0549] The ID (identification number) of the transmitting panel antenna (here, for example, equivalent to xi)

[0550] Identification number (ID) of the parameter used for beamforming (directivity control) (here, for example, equivalent to j)

[0551] By sending the "ID (identification) of the transmitting panel antenna" and the "identification (ID) of the parameters used for beamforming (directivity control)" through the terminal #i of 902_i, the base station #1 of 901_1 can know the received "ID (identification) of the transmitting panel antenna" and the "identification (ID) of the parameters used for beamforming (directivity control)", and the terminal #i of 902_i and the base station #1 of 901_1 can perform appropriate control, thereby achieving the effect of improving the data reception quality.

[0552] And, as Figure 24 、 Figure 15A 、 Figure 15B As shown, when terminal #i of 902_i sends "reference signal 1501_xi for sector scanning in transmitting panel antenna xi of terminal #i", "reference signal 1511_j using jth parameter in transmitting panel antenna xi" can include the following information, for example.

[0553] The frequency band and / or frequency band used by terminal #i 902_i in transmission or intended to be used by base station #1 901_1 Related information"

[0554] The terminal #i of 902_i sends the "with frequency band and / or frequency Related information”, base station #1 of 901_1 can know “the frequency band and / or frequency Related information", terminal #i of 902_i and base station #1 of 901_1 can perform appropriate control, thereby achieving the effect of improving the reception quality of data.

[0555] Figure 16A Shown to exist Figure 10 An example of the structure of the feedback signal 1002 sent by the base station #1 of 901_1 in the time interval from t2 to t3. Figure 16A In this example, let the horizontal axis be time and the vertical axis be frequency. Figure 16A As shown, feedback signal 1002 includes a first transmission interval, a second transmission interval, a third transmission interval, and a fourth transmission interval. Alternatively, feedback signal 1002 may include Ω transmission intervals, where Ω is an integer greater than or equal to 1 or an integer greater than or equal to 2.

[0556] In addition, let Figure 16A In the feedback signal 1002, there is a frequency band frequency band frequency band

[0557] Therefore, in the first transmission interval, there is a frequency Feedback signal 1st sending interval 1601_11, frequency Feedback signal 1st transmission interval 1601_21, ..., frequency The first transmission interval 1601_K1 is used for the feedback signal. Similarly, in the second transmission interval, there is a frequency Feedback signal second transmission interval 1601_12, frequency Feedback signal second transmission interval 1601_22, ..., frequency The feedback signal is sent in the second transmission interval 1601_K2. In the third transmission interval, there is a frequency Feedback signal 3rd sending interval 1601_13, frequency Feedback signal 3rd sending interval 1601_23, ..., frequency The third transmission interval 1601_K3 is used for the feedback signal. In the fourth transmission interval, there is a frequency Use the feedback signal 4 to send interval 1601_14, frequency Feedback signal 4th sending interval 1601_24, ..., frequency The feedback signal is sent in the fourth transmission interval 1601_K4.

[0558] “ Figure 16A In the i-th time interval, a feedback signal is transmitted from the same transmitting panel antenna regardless of the frequency band.

[0559] Figure 16B Shown for Figure 16A The feedback signal 1002 shown is an example of a specific feedback signal distribution.

[0560] For example, set Figure 24 As shown, terminal #1 of 902_1 sends terminal #1 "sector scanning reference signal" 2401_1, terminal #2 of 902_2 sends terminal #2 "sector scanning reference signal" 2401_2, terminal #3 of 902_3 sends terminal #3 "sector scanning reference signal" 2401_3, and other terminals also send sector scanning reference signals.

[0561] Furthermore, it is assumed that the terminal #1 "sector scanning reference signal" 2401_1 includes "band Therefore, the base station #1 of 901_1 Figure 16B As shown, the frequency band used Send feedback signal 1611_1 to terminal #1.

[0562] Assume that the terminal #2 "sector scanning reference signal" 2401_2 includes "band Therefore, the base station #1 of 901_1 Figure 16B As shown, the frequency band used Send feedback signal 1611_2 to terminal #2.

[0563] Assume that the terminal #3 "sector scanning reference signal" 2401_3 includes "band frequency band Therefore, the base station #1 of 901_1 Figure 16B As shown, the frequency band used Send feedback signal 1611_3 to terminal #3.

[0564] Assume that terminal #4 "sector scanning reference signal" (in Figure 24 (not shown) includes "band Therefore, the base station #1 of 901_1 Figure 16B As shown, the frequency band used Send feedback signal 1611_4 to terminal #4.

[0565] Assume that terminal #5 "sector scanning reference signal" (in Figure 24 (not shown) includes "band Therefore, the base station #1 of 901_1 Figure 16B As shown, the frequency band used Send feedback signal 1611_5 to terminal #5.

[0566] Assume that terminal #6 "sector scanning reference signal" (in Figure 24 (not shown) includes "band Therefore, the base station #1 of 901_1 Figure 16B As shown, the frequency band used Send feedback signal 1611_6 to terminal #6.

[0567] Thus, the terminal #i of 902_i can know that it is able to communicate with the base station #1 of 901_1 and can also know the frequency band used by obtaining the feedback signal 1611_i sent to the terminal #i. Figure 16B This is just an example. For example, if there is no feedback signal 1611_1 sent to terminal #1 as the feedback signal 1002, terminal #1 at 902_1 will know that communication with base station #1 at 901_1 is not established.

[0568] At this time, it is assumed that the feedback signal 1611_i sent to the terminal #i includes, for example, that the terminal #i 902_i can communicate (or Figure 10 Frame 1003 containing data symbols includes information about symbols sent to terminal #i of 902_i).

[0569] In addition, based on the "information on the frequency (band) of base station #1 901_1 with good reception quality and information on the transmitting panel antenna and parameters" sent by terminal #i 902_i, base station #1 901_1 selects the frequency (band), the transmitting panel antenna, sets the parameters of the beamforming, and sends a feedback signal 1611_i to terminal #i.

[0570] Figure 17A Shown to exist Figure 10 An example of the structure of the frame 1003 containing the data symbols transmitted by the base station #1 of 901_1 in the time interval from t4 to t5. Figure 17A In this example, let the horizontal axis be time and the vertical axis be frequency. Figure 17A As shown, a frame 1003 containing data symbols includes a first transmission interval, a second transmission interval, a third transmission interval, and a fourth transmission interval. Alternatively, a frame 1003 containing data symbols may include Ω transmission intervals, where Ω is an integer greater than or equal to 1 or an integer greater than or equal to 2.

[0571] In addition, let Figure 17A In the frame 1003 containing the data symbol, there is a frequency band frequency band frequency band

[0572] Therefore, in the first transmission interval, there is a frequency Use the modulation signal (time slot) to send the first interval 1701_11, frequency The first transmission interval 1701_21, ..., frequency The first transmission interval 1701_K1 is transmitted using a modulated signal (time slot). Similarly, in the second transmission interval, there is a frequency The second transmission interval 1701_12 is used for the modulation signal (time slot), and the frequency The second transmission interval 1701_22, ..., frequency is used for the modulation signal (time slot) The second transmission interval 1701_K2 is transmitted using the modulated signal (time slot). In the third transmission interval, there is a frequency The modulation signal (time slot) is used to transmit the third interval 1701_13, the frequency The modulation signal (time slot) is used to transmit the third interval 1701_23, ..., frequency The third transmission interval 1701_K3 is used with the modulated signal (time slot). In the fourth transmission interval, there is a frequency The modulation signal (time slot) is used for the 4th transmission interval 1701_14, the frequency The modulation signal (time slot) is used to transmit the 4th interval 1701_24, ..., frequency Use the modulated signal (time slot) for the 4th transmission interval 1701_K4.

[0573] Figure 17B Shown for Figure 17A 1003 shows an example of allocation of specific modulation signals (time slots) to frame 1003 containing data symbols.

[0574] Set as Figure 24 As in the example, terminal #1 at 902_1 transmits a “sector scan reference signal” 2401_1 to terminal #1, terminal #2 at 902_2 transmits a “sector scan reference signal” 2401_2 to terminal #2, terminal #3 at 902_3 transmits a “sector scan reference signal” 2401_3 to terminal #3, and terminal #4 at 902_4 transmits a “sector scan reference signal” to terminal #4 (it should be noted that Figure 24 Not recorded in the ), terminal #5 of 902_5 sends terminal #5 "sector scanning reference signal" (it should be explained that Figure 24Not recorded in the ), terminal #6 of 902_6 sends terminal #6 "sector scanning reference signal" (it should be explained that Figure 24 not recorded in the literature).

[0575] Furthermore, it is assumed that the terminal #1 "sector scanning reference signal" 2401_1 includes "band Therefore, the base station #1 of 901_1 Figure 17B As shown, the frequency band used The modulated signal (time slot) 1711 is sent to terminal #1.

[0576] Assume that the terminal #2 "sector scanning reference signal" 2401_2 includes "band Therefore, the base station #1 of 901_1 Figure 17B As shown, the frequency band used The modulated signal (time slot) 1712 is sent to terminal #2.

[0577] Assume that the terminal #3 "sector scanning reference signal" 2401_3 includes "band frequency band Therefore, the base station #1 of 901_1 Figure 17B As shown, the frequency band used The modulated signal (time slot) 1713 is sent to terminal #3.

[0578] Assume that terminal #4 "sector scanning reference signal" (in Figure 24 (not shown) includes "band Therefore, the base station #1 of 901_1 Figure 17B As shown, the frequency band used A modulated signal (time slot) 1714 is sent to terminal #4.

[0579] Assume that terminal #5 "sector scanning reference signal" (in Figure 24 (not shown) includes "band Therefore, the base station #1 of 901_1 Figure 17B As shown, the frequency band used The modulated signal (time slot) 1715 is sent to terminal #5.

[0580] Assume that terminal #6 "sector scanning reference signal" (in Figure 24 (not shown) includes "band Therefore, the base station #1 of 901_1 Figure 17B As shown, the frequency band used The modulated signal (time slot) 1716 is sent to terminal #6.

[0581] At this time, it is assumed that the modulated signal (time slot) 171i addressed to the terminal #i includes, for example, a data symbol (data, information) addressed to the terminal #i of 902_i.

[0582] Thus, by transmitting the modulated signal (time slot) 171i to the terminal #i, the terminal #i at 902_i can know that it is able to communicate with the base station #1 at 901_1 and can also know the frequency band used. Figure 17B This is just an example. For example, if there is no modulated signal (time slot) 1711 sent to terminal #1 as frame 1003 containing data codewords, terminal #1 902_1 will know that communication with base station #1 901_1 is not established.

[0583] Based on the "frequency (band) information of base station #1 901_1 with good reception quality and information on the transmitting panel antenna and parameters" sent by terminal #i of 902_i, base station #1 of 901_1 selects the frequency (band), the transmitting panel antenna, sets the parameters of beamforming, and sends the modulated signal (time slot) 171i to terminal #i.

[0584] Alternatively, Figure 16A 、 Figure 16B In the process, base station #1 of 901_1 receives the "reference signal '2401_i' for sector scanning of terminal #i sent by terminal #i of 902_i", and estimates the "frequency (band)" and "transmitting panel antenna and parameters" of terminal #i of 902_1 with good reception quality. This information is included in the feedback signal 1611_i sent to terminal #i.

[0585] Therefore, terminal #i of 902_i selects the frequency (frequency band), the transmitting panel antenna, sets the beamforming method, and sends the code element, frame and / or modulated signal to base station #1 of 901_1 based on the information of "frequency (frequency band)" and "transmitting panel antenna and parameters" of terminal #i of 902_i with good reception quality obtained from base station #1 of 901_1, thereby achieving the effect of improving the reception quality of data in base station #1 of 901_1.

[0586] In addition, Figure 10 During the time interval from t3 to t4, terminal #i of 902_i may also transmit a modulated signal including information such as ACK (acknowledgement) indicating that a signal from base station #1 of 901_1 has been received to base station #1 of 901_1.

[0587] In addition, Figure 17BIn addition to data symbols, the modulated signal (time slot) 171i transmitted to terminal #i may also include, for example, reference signals such as "DMRS (demodulation reference signal), PTRS (phase tracking reference signal), SRS (sounding reference signal)," pilot symbols, pilot signals, preambles, and symbols containing control information. Symbols containing control information include information on the destination terminal (an ID that can identify the terminal), the modulation signal transmission method, information on the modulation scheme, information on the error correction coding scheme (code length, coding rate, etc.), and information on the MCS (Modulation and Coding Scheme).

[0588] Figure 18 Shown as Figure 9 This is an example of a situation in which 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 902_4, terminal #5 of 902_5, and terminal #6 of 902_6." Figure 18 (A) shows an example of the transmission status of the modulated signal of the base station #1 of 901_1. Figure 18 (B) shows an example of the transmission status of the modulated signal of "Terminal #1 of 902_1, Terminal #2 of 902_2, Terminal #3 of 902_3, Terminal #4 of 902_4, Terminal #5 of 902_5, Terminal #6 of 902_6". In addition, Figure 18 (A) Figure 18 In (B), the horizontal axis is assumed to be time.

[0589] First, the base station #1 of 901_1 transmits the sector scanning reference signal 1801_1. Figure 10 The description has been given, so the description is omitted.

[0590] Next, the terminals "Terminal #1 of 902_1, Terminal #2 of 902_2, Terminal #3 of 902_3, Terminal #4 of 902_4, Terminal #5 of 902_5, Terminal #6 of 902_6" transmit the sector scanning reference signal 1851_1. Figure 23 、 Figure 24 、 Figure 15A 、 Figure 15B etc., so the description is omitted.

[0591] Base station #1 of 901_1 sends feedback signal 1802_1. Figure 16A 、 Figure 16B The description has been given, so the description is omitted.

[0592] Then, the base station #1 of 901_1 transmits "frame 1803_1 containing data symbols". Figure 17A 、 Figure 17B Since the above description has been given, the description thereof will be omitted. (Therefore, "frame 1803_1 including data symbols" is considered to be a frame for downlink, for example.)

[0593] Next, the terminals "Terminal #1 of 902_1, Terminal #2 of 902_2, Terminal #3 of 902_3, Terminal #4 of 902_4, Terminal #5 of 902_5, and Terminal #6 of 902_6" transmit "frame 1852_1 containing data symbols." The structure of this frame will be described later. Figure 25 (Thus, "frame 1852_1 including data symbols" is considered to be an uplink frame, for example.)

[0594] Next, the base station #1 of 901_1 transmits "frame 1803_2 including data symbols". In addition, the method of forming "frame 1803_2 including data symbols" is as follows: Figure 17A 、 Figure 17B Carry out the method described in the description.

[0595] Next, the terminals "Terminal #1 of 902_1, Terminal #2 of 902_2, Terminal #3 of 902_3, Terminal #4 of 902_4, Terminal #5 of 902_5, and Terminal #6 of 902_6" transmit "frame 1852_2 containing data symbols." The structure of this frame will be described later. Figure 25 Provide explanation.

[0596] Figure 19 Shown Figure 18 Examples of the subsequent transmission status of the modulated signal of base station #1 of 901_1 and the transmission status of the modulated signals of terminals such as "terminal #1 of 902_1, terminal #2 of 902_2, terminal #3 of 902_3, terminal #4 of 902_4, terminal #5 of 902_5, and terminal #6 of 902_6".

[0597] Figure 19 (A) shows an example of the transmission status of the modulated signal of the base station #1 of 901_1, which is continuous in time with Figure 18 (A) The transmission status of the modulated signal of base station #1 of 901_1.

[0598] Figure 19(B) shows an example of the transmission status of the modulated signal of "terminal #1 of 902_1, terminal #2 of 902_2, terminal #3 of 902_3, terminal #4 of 902_4, terminal #5 of 902_5, terminal #6 of 902_6", which is continuous in time from Figure 18 (B) The transmission status of the modulated signals of "terminal #1 of 902_1, terminal #2 of 902_2, terminal #3 of 902_3, terminal #4 of 902_4, terminal #5 of 902_5, and terminal #6 of 902_6".

[0599] in addition, Figure 19 (A) Figure 19 In (B), the horizontal axis is assumed to be time.

[0600] exist Figure 18 (A) Figure 18 After (B), the base station #1 of 901_1 transmits "frame 1803_3 containing data symbols". In addition, the formation method of "frame 1803_3 containing data symbols" is as follows: Figure 17A 、 Figure 17B Carry out the method described in the description.

[0601] Next, the terminals "Terminal #1 of 902_1, Terminal #2 of 902_2, Terminal #3 of 902_3, Terminal #4 of 902_4, Terminal #5 of 902_5, and Terminal #6 of 902_6" transmit "frame 1852_3 containing data symbols." The structure of this frame will be described later. Figure 25 Provide explanation.

[0602] Next, the base station #1 of 901_1 transmits the sector scanning reference signal 1801_2. Figure 10 The description has been given, so the description is omitted.

[0603] Next, the terminals "Terminal #1 of 902_1, Terminal #2 of 902_2, Terminal #3 of 902_3, Terminal #4 of 902_4, Terminal #5 of 902_5, Terminal #6 of 902_6" transmit the sector scanning reference signal 1851_2. Figure 23 、 Figure 24 、 Figure 15A 、 Figure 15B etc., so the description is omitted.

[0604] Base station #1 of 901_1 sends feedback signal 1802_2. Figure 16A 、 Figure 16B The description has been given, so the description is omitted.

[0605] Next, the base station #1 of 901_1 transmits "frame 1803_4 containing data symbols". Figure 17A 、 Figure 17B The description has been given, so the description is omitted.

[0606] Next, the terminals "Terminal #1 of 902_1, Terminal #2 of 902_2, Terminal #3 of 902_3, Terminal #4 of 902_4, Terminal #5 of 902_5, and Terminal #6 of 902_6" transmit "frame 1852_4 containing data symbols." The structure of this frame will be described later. Figure 25 Provide explanation.

[0607] In this way, before "base station #1 of 901_1 transmits a 'frame containing data symbols', and / or before "terminal #1 of 902_1, terminal #2 of 902_2, terminal #3 of 902_3, terminal #4 of 902_4, terminal #5 of 902_5, terminal #6 of 902_6, etc. transmit a 'frame containing data symbols'", base station #1 of 901_1 and the terminal transmit a sector scanning reference signal, and before "base station #1 of 901_1 transmits a 'frame containing data symbols'", And / or after terminals such as 'terminal #1 of 902_1, terminal #2 of 902_2, terminal #3 of 902_3, terminal #4 of 902_4, terminal #5 of 902_5, and terminal #6 of 902_6' send 'a frame containing data symbols', a reference signal for sector scanning is sent again to set the frequency (band), select the transmitting panel antenna to be used, and set the transmit beamforming. This enables the base station and the terminal to obtain high data reception quality.

[0608] Next, use Figure 25 , the structure 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, terminal #4 of 902_4, terminal #5 of 902_5, and terminal #6 of 902_6" will be described. In addition, for example, it is assumed that i is an integer greater than 1, Figure 25 In the example, the horizontal axis is time.

[0609] Set as Figure 25 As shown, "frame 1852_i including data symbols" is composed of the 1st transmission interval, the 2nd transmission interval, the 3rd transmission interval, the 4th transmission interval, the 5th transmission interval, the 6th transmission interval, the 7th transmission interval, and the 8th transmission interval.

[0610] like Figure 25 As shown, for example, terminal #1 at 902_1 uses the first transmission interval to transmit terminal #1 transmission frame 2501_1 (including data symbols).

[0611] Terminal #2 at 902_2 uses the sixth transmission interval to transmit terminal #2 transmission frame 2501_2 (including data symbols).

[0612] Terminal #3 at 902_3 uses the fourth transmission interval to transmit terminal #3 transmission frame 2501_3 (including data symbols).

[0613] Terminal #4 at 902_4 uses the second transmission interval to transmit terminal #4 transmission frame 2501_4 (including data symbols).

[0614] Terminal #5 at 902_5 uses the 8th transmission interval to transmit terminal #5 transmission frame 2501_5 (including data symbols).

[0615] Terminal #6 at 902_6 uses the fifth transmission interval to transmit terminal #6 transmission frame 2501_6 (including data symbols).

[0616] Furthermore, it is assumed that terminals such as "terminal #1 of 902_1, terminal #2 of 902_2, terminal #3 of 902_3, terminal #4 of 902_4, terminal #5 of 902_5, and terminal #6 of 902_6" use a single-carrier transmission method. Furthermore, it is assumed that multiple terminals may use the same frequency (band).

[0617] In this way, by time-splitting the "frame 1852_i containing data codewords" sent by terminals such as "terminal #1 of 902_1, terminal #2 of 902_2, terminal #3 of 902_3, terminal #4 of 902_4, terminal #5 of 902_5, and terminal #6 of 902_6", each terminal sends a frame, and the base station #1 of 901_1 receives the frame sent by each terminal, thereby suppressing interference and thus achieving high data reception quality.

[0618] In addition, Figure 25 In the frame 2501_1 sent by terminal #1, the frame 2501_2 sent by terminal #2, the frame 2501_3 sent by terminal #3, the frame 2501_4 sent by terminal #4, the frame 2501_5 sent by terminal #6, in addition to the data codewords, it can also include "reference signals such as DMRS, PTRS, SRS", pilot codewords, pilot signals, preamble codes, codewords containing control information, etc.

[0619] exist Figure 25In the description, the case of time division of the frames sent by the terminal is described, but MU-MIMO (Multi User-MIMO (Multiple-Input Multiple-Output)) can also be used to spatially divide the frames sent by the terminal.

[0620] Figure 24 In the figure, it is shown that Figure 23 The examples shown are related to the occupancy of the terminal of "the first sending interval 1301_1 for the terminal using the 'reference signal for sector scanning', the second sending interval 1301_2 for the terminal using the 'reference signal for sector scanning', the third sending interval 1301_3 for the terminal using the 'reference signal for sector scanning', the fourth sending interval 1301_4 for the terminal using the 'reference signal for sector scanning', the fifth sending interval 1301_5 for the terminal using the 'reference signal for sector scanning', the sixth sending interval 1301_6 for the terminal using the 'reference signal for sector scanning', the seventh sending interval 1301_7 for the terminal using the 'reference signal for sector scanning', and the eighth sending interval 1301_8 for the terminal using the 'reference signal for sector scanning'".

[0621] Figure 26 In the description, it is different from Figure 24 of, and Figure 23 The examples shown are related to the occupancy of the terminal of "the first sending interval 1301_1 for the terminal using the 'reference signal for sector scanning', the second sending interval 1301_2 for the terminal using the 'reference signal for sector scanning', the third sending interval 1301_3 for the terminal using the 'reference signal for sector scanning', the fourth sending interval 1301_4 for the terminal using the 'reference signal for sector scanning', the fifth sending interval 1301_5 for the terminal using the 'reference signal for sector scanning', the sixth sending interval 1301_6 for the terminal using the 'reference signal for sector scanning', the seventh sending interval 1301_7 for the terminal using the 'reference signal for sector scanning', and the eighth sending interval 1301_8 for the terminal using the 'reference signal for sector scanning'".

[0622] exist Figure 26 In the Figure 23 、 Figure 24 The same reference numerals are given to parts that have the same operation, and their description has been omitted.

[0623] Figure 9Terminal #2 of 902_2 can communicate with base station #1 of 901_1 by receiving the sector scanning reference signal 1001 sent by base station #1 of 901_1, and obtaining the "frequency (band)" with good reception quality, "ID (identification) (identification number) of the transmitting panel antenna" and "identification number (ID) of the parameters used for beamforming (directional control)".

[0624] Assume that terminal #2 of 902_2 estimates the frequency band As the "frequency (band)" with good reception quality, for example, the "transmitting panel antenna a2 and parameters b2" are estimated as the "transmitting panel antenna and parameters" with good reception quality.

[0625] In addition, terminal #2 of 902_2 estimates the "transmitting panel antenna and parameters" with good reception quality, and obtains information on the "number of time divisions in which the reference signal for sector scanning can be sent when the terminal sends the reference signal for sector scanning." Figure 26 In the example, terminal #2 of 902_2 obtains the information that "when the terminal transmits a reference signal for sector scanning, the number of time divisions in which the reference signal for sector scanning can be transmitted" is 8.

[0626] In this case, the terminal #2 of 902_2 uses the random number to obtain a value such as "0", "1", "2", "3", "4", "5", "6", or "7". For example, suppose the terminal #2 of 902_2 obtains "5" using the random number. In this case, since "5" + 1 = 6, the terminal #2 of 902_2 Figure 26 As shown, the "sector scan reference signal" 2401_2 of terminal #2 is transmitted using the "sixth transmission interval 1301_6 of the 'sector scan reference signal' for the terminal".

[0627] Furthermore, it is assumed that the "sector scanning reference signal" 2401_2 of terminal #2 includes information on the "transmitting panel antenna and parameters" with good reception quality obtained by terminal #2 at 902_2, that is, information on the "transmitting panel antenna a2 and parameters b2".

[0628] Figure 9 Terminal #3 of 902_3 can communicate with base station #1 of 901_1 by receiving the sector scanning reference signal 1001 sent by base station #1 of 901_1, and obtaining the "ID (identification) of the transmitting panel antenna" with good reception quality and the "identification (ID) of the parameters used for beamforming (directionality control)".

[0629] Assume that terminal #3 of 902_3 estimates the frequency band As the "frequency (band)" with good reception quality, for example, "transmitting panel antenna a3 and parameters b3" are estimated as the "transmitting panel antenna and parameters" with good reception quality.

[0630] In addition, terminal #3 of 902_3 estimates the "frequency (band)" and "transmitting panel antenna and parameters" with good reception quality, and obtains the information of "the number of time divisions in which the reference signal for sector scanning can be sent when the terminal sends the reference signal for sector scanning." Figure 26 In the example, terminal #3 of 902_3 obtains the information that "when the terminal transmits a reference signal for sector scanning, the number of time divisions in which the reference signal for sector scanning can be transmitted" is 8.

[0631] In this case, the terminal #3 of 902_3 uses the random number to obtain a value such as "0", "1", "2", "3", "4", "5", "6", or "7". For example, suppose the terminal #3 of 902_3 obtains "5" using the random number. In this case, since "5" + 1 = 6, the terminal #3 of 902_3 Figure 26 As shown, the "sector scan reference signal" 2601_3 of terminal #3 is transmitted using the "sector scan reference signal for terminal 6 transmission interval 1301_6".

[0632] Furthermore, it is assumed that the "sector scanning reference signal" 2601_3 of terminal #3 includes information on the "transmitting panel antenna and parameters" with good reception quality obtained by terminal #3 at 902_3, that is, information on the "transmitting panel antenna a3 and parameters b3".

[0633] At this time, if Figure 26 As shown, the time intervals of "terminal #2' sector-scan reference signal '2401_2' transmitted by terminal #2 of 902_2" and "terminal #3' sector-scan reference signal '2601_3' transmitted by terminal #3 of 902_3" overlap.

[0634] Therefore, base station #1 at 901_1 may simultaneously receive the “sector scan reference signal” 2401_2 of terminal #2 and the “sector scan reference signal” 2601_3 of terminal #3.

[0635] In this context, the following two examples can be considered.

[0636] <Example 1>

[0637] Both the "terminal #2' sector scan reference signal '2401_2' transmitted by the terminal #2 of 902_2" and the "terminal #3' sector scan reference signal '2601_3' transmitted by the terminal #3 of 902_3" are Figure 15A 、 Figure 15B structure.

[0638] In this case, it is assumed that the "parameters of the transmitting panel antenna and beamforming of terminal #2 at 902_2 with good reception quality when receiving the 'sector scanning reference signal ' 2401_2 for terminal #2 sent by terminal #2 at 902_2'" at base station #1 at 901_1 are different from the "parameters of the transmitting panel antenna and beamforming of terminal #3 at 902_3 with good reception quality when receiving the 'sector scanning reference signal ' 2601_3 for terminal #3 sent by terminal #3 at 902_3'" at base station #1 at 901_1. Therefore, base station #1 at 901_1 obtains the information contained in the "sector scanning reference signal ' 2401_2 for terminal #2 sent by terminal #2 at 902_2" and the information contained in the "sector scanning reference signal ' 2601_3 for terminal #3 sent by terminal #3 at 902_3."

[0639] In this case, for example, Figure 16A In the “Frequency The second transmission interval 1601_12 of the feedback signal is set as the signal sent to the terminal #2 of 902_2, and the frequency The third transmission interval 1601_13 of the feedback signal is set to be a signal sent to terminal #3 in 902_3.

[0640] In addition, for example, Figure 17A In the “Frequency Use the modulation signal (time slot) to set the second transmission interval 1701_12 as the signal sent to the terminal #2 of 902_2, and "set the frequency The modulated signal (time slot) third transmission interval 1701_13 is set as a signal destined for terminal #3 at 902_3.

[0641] As a result, base station #1 of 901_1 can communicate with terminal #2 of 902_2 and terminal #3 of 902_3.

[0642] <Example 2>

[0643] Both the "terminal #2' sector scan reference signal '2401_2' transmitted by the terminal #2 of 902_2" and the "terminal #3' sector scan reference signal '2601_3' transmitted by the terminal #3 of 902_3" are Figure 15A 、 Figure 15B structure.

[0644] At this time, it is assumed that the base station #1 of 901_1 "receives the 'sector scanning reference signal' 2401_2 for terminal #2 sent by terminal #2 of 902_2, and receives the 'transmitting panel antenna and beamforming parameters of terminal #2 of 902_2 with good reception quality" and the base station #1 of 901_1 "receives the 'sector scanning reference signal' 2601_3 for terminal #3 sent by terminal #3 of 902_3, and receives the 'transmitting panel antenna and beamforming parameters of terminal #3 of 902_3 with good reception quality" interfere with each other.

[0645] <Example 2-1>

[0646] Base station #1 at 901_1 may obtain either information included in "terminal #2's sector-scanning reference signal '2401_2' transmitted by terminal #2 at 902_2" or information included in "terminal #3's sector-scanning reference signal '2601_3' transmitted by terminal #3 at 902_3."

[0647] For example, it is assumed that the base station #1 at 901_1 obtains information included in "the terminal #2's sector scanning reference signal '2401_2' transmitted by the terminal #2 at 902_2."

[0648] In this case, for example, Figure 16A In the “Frequency The feedback signal second transmission interval 1601_13 is set as a signal sent to terminal #2 in 902_2.

[0649] In addition, for example, Figure 17A In the “Frequency The second transmission interval 1701_13 is set to be a signal sent to terminal #2 in 902_2 using the modulated signal (time slot).

[0650] As a result, base station #1 of 901_1 can communicate with (terminal #1 of 902_1) and terminal #2 of 902_2.

[0651] The operation of terminal #3 of 902_3 is described.

[0652] Set as Figure 18 The sector scan reference signal 1851_1 is in Figure 26 That state. Therefore, in Figure 18 Among 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.

[0653] In this case, Figure 9 Terminal #3 of 902_3 can receive the signal sent by base station #1 of 901_1. Figure 19The sector scan uses reference signal 1801_2, and obtains the "frequency (band)" with good reception quality, "ID (identification) of the transmitting panel antenna" and "identification (ID) of the parameters used for beamforming (directional control)", and communicates with the base station #1 of 901_1.

[0654] Assume that terminal #3 of 902_3 estimates the frequency band As the "frequency (band)" with good reception quality, for example, "transmitting panel antenna a3 and parameters b3" are estimated as the "transmitting panel antenna and parameters" with good reception quality.

[0655] Furthermore, while performing these estimates, terminal #3 in 902_3 obtains information regarding the number of time divisions during which the terminal can transmit the sector scanning reference signal. Terminal #3 in 902_3 obtains information indicating that the number of time divisions during which the terminal can transmit the sector scanning reference signal is 8.

[0656] In this case, the terminal #3 of 902_3 uses the random number to obtain a value such as "0", "1", "2", "3", "4", "5", "6", or "7". For example, suppose that the terminal #3 of 902_3 uses a different seed from the previous one to generate a random number and obtains "3". In this case, since "3" + 1 = 4, the terminal #3 of 902_3 is as follows: Figure 24 As shown, the "sector scan reference signal" 2401_3 of terminal #3 is transmitted using the "fourth transmission interval 1301_4 of the 'sector scan reference signal' for the terminal".

[0657] Furthermore, it is assumed that the "sector scanning reference signal" 2401_3 of terminal #3 includes information on the "transmitting panel antenna and parameters" with good reception quality obtained by terminal #3 at 902_3, that is, information on the "transmitting panel antenna a3 and parameters b3".

[0658] At this time, if Figure 24 As shown, base station #1 at 901_1 receives "terminal #3 'sector scanning reference signal' 2401_3 transmitted by terminal #3 at 902_3", and then performs the aforementioned predetermined process, and base station #1 at 901_1 communicates with terminal #3 at 902_3.

[0659] <Example 2-2>

[0660] Sometimes, both the information included in the "terminal #2' sector-scan reference signal '2401_2' transmitted by terminal #2 of 902_2" and the information included in the "terminal #3' sector-scan reference signal '2601_3' transmitted by terminal #3 of 902_3" cannot be obtained by the base station #1 of 901_1.

[0661] Set as Figure 18 The sector scan reference signal 1851_1 is in Figure 26 In such a state, the base station #1 of 901_1 cannot obtain either the information contained in the "terminal #2' sector scanning reference signal '2401_2' transmitted by the terminal #2 of 902_2" or the information contained in the "terminal #3' sector scanning reference signal '2601_3' transmitted by the terminal #3 of 902_3". Figure 18 In frames 1803_1, 1803_2, and 1803_3 containing data symbols, there are no frames (time slots) addressed to terminal #2 of 902_2 or frames (time slots) addressed to terminal #3 of 902_3.

[0662] In this case, Figure 9 Terminal #2 of 902_2 can receive the signal sent by base station #1 of 901_1. Figure 19 The sector scan uses reference signal 1801_2, and obtains the "frequency (band)" with good reception quality, "ID (identification) of the transmitting panel antenna" and "identification (ID) of the parameters used for beamforming (directional control)", and communicates with the base station #1 of 901_1.

[0663] Assume that terminal #2 of 902_2 estimates the frequency band As the "frequency (band)" with good reception quality, for example, the "transmitting panel antenna a2 and parameters b2" are estimated as the "transmitting panel antenna and parameters" with good reception quality.

[0664] Furthermore, while performing these estimates, terminal #2 in 902_2 obtains information regarding the number of time divisions during which the terminal can transmit the sector scanning reference signal. Terminal #2 in 902_2 obtains information indicating that the number of time divisions during which the terminal can transmit the sector scanning reference signal is 8.

[0665] In this case, the terminal #2 of 902_2 uses the random number to obtain a value such as "0", "1", "2", "3", "4", "5", "6", or "7". For example, suppose that the terminal #2 of 902_2 uses a different seed from the previous one to generate a random number and obtains "5". In this case, since "5" + 1 = 6, the terminal #2 of 902_2 is Figure 24 As shown, the "sector scan reference signal" 2401_2 of terminal #2 is transmitted using the "sixth transmission interval 1301_6 of the 'sector scan reference signal' for the terminal".

[0666] Furthermore, it is assumed that the "sector scanning reference signal" 2401_2 of terminal #2 includes information on the "transmitting panel antenna and parameters" with good reception quality obtained by terminal #2 at 902_2, that is, information on the "transmitting panel antenna a2 and parameters b3".

[0667] At this time, if Figure 24 As shown, base station #1 at 901_1 receives "terminal #2's sector scanning reference signal' 2401_2 transmitted by terminal #2 at 902_2", and then performs the aforementioned predetermined process, and base station #1 at 901_1 communicates with terminal #2 at 902_2.

[0668] Likewise, Figure 9 Terminal #3 of 902_3 can receive the signal sent by base station #1 of 901_1. Figure 19 The sector scan uses reference signal 1801_2, and obtains the "frequency (band)" with good reception quality, "ID (identification) of the transmitting panel antenna" and "identification (ID) of the parameters used for beamforming (directional control)", and communicates with the base station #1 of 901_1.

[0669] Assume that terminal #3 of 902_3 estimates the frequency band As the "frequency (band)" with good reception quality, for example, "transmitting panel antenna a3 and parameters b3" are estimated as the "transmitting panel antenna and parameters" with good reception quality.

[0670] Furthermore, while performing these estimates, terminal #3 in 902_3 obtains information regarding the number of time divisions during which the terminal can transmit the sector scanning reference signal. Terminal #3 in 902_3 obtains information indicating that the number of time divisions during which the terminal can transmit the sector scanning reference signal is 8.

[0671] In this case, the terminal #3 of 902_3 uses the random number to obtain a value such as "0", "1", "2", "3", "4", "5", "6", or "7". For example, suppose that the terminal #3 of 902_3 uses a different seed from the previous one to generate a random number and obtains "3". In this case, since "3" + 1 = 4, the terminal #3 of 902_3 is as follows: Figure 24 As shown, the "sector scan reference signal" 2401_3 of terminal #3 is transmitted using the "fourth transmission interval 1301_4 of the 'sector scan reference signal' for the terminal".

[0672] Furthermore, it is assumed that the "sector scanning reference signal" 2401_3 of terminal #3 includes information on the "transmitting panel antenna and parameters" with good reception quality obtained by terminal #3 at 902_3, that is, information on the "transmitting panel antenna a3 and parameters b3".

[0673] At this time, if Figure 24 As shown, base station #1 at 901_1 receives "terminal #3 'sector scanning reference signal' 2401_3 transmitted by terminal #3 at 902_3", and then performs the aforementioned predetermined process, and base station #1 at 901_1 communicates with terminal #3 at 902_3.

[0674] This can further reduce conflicts among sector scanning reference signals sent by each terminal, thereby increasing the number of sector scanning reference signals that the base station can receive, thereby increasing the number of terminals communicating with the base station.

[0675] As described in the second embodiment, the terminal transmits a reference signal for sector scanning in such a manner as to reduce the number of collisions, thereby achieving the following effect: improving the communication capacity of the system composed of the base station and the terminal. Figure 1A 、 Figure 1B 、 Figure 1C In addition, the structure of the transmitting panel antenna and the receiving panel antenna is not limited to Figure 3 、 Figure 4 For example, any structure that can generate one or more antennas with transmission directivity and reception directivity is sufficient. Figure 10 、 Figure 11 、 Figure 12 、 Figure 23 、 Figure 24 、 Figure 15A 、 Figure 15B 、 Figure 16A 、 Figure 16B 、 Figure 17A 、 Figure 17B 、 Figure 18 、 Figure 19、 Figure 24 、 Figure 25 、 Figure 26 There are signals, frames, etc. in it, but the names are not limited to these. What is important is the function of the signal itself that is sent.

[0676] (Implementation 3)

[0677] In this third embodiment, as a variation of the first embodiment, we describe an example in which a base station transmits multiple modulated signals (multiple streams) to a terminal. (That is, we describe an example in which MIMO (Multiple-Input Multiple-Output) is implemented.) The following description of the third embodiment may also refer to the figures shown in the first and second embodiments.

[0678] Figure 9 An example of the communication state of this embodiment is shown. Since the details have been described, the description thereof will be omitted.

[0679] Figure 27 Shown Figure 9 An example of a modulated signal 2700 transmitted by base station #1 of 901_1. Figure 10 The same reference numerals are assigned to parts that perform the same operations, and description thereof will be omitted.

[0680] The sector scanning reference signal 1001 exists in the time interval from time t0 to time t1.

[0681] The time interval from time t1 to time t2 is the response interval of the terminal.

[0682] In the time interval from time t2 to time t3, there is a feedback signal group 2702. In addition, the feedback signal group 2702 will be described later.

[0683] In the time interval from time t4 to time t5, there is a frame group 2703 including data symbols. Frame group 2703 including data symbols will be described later.

[0684] As described in other embodiments, it is assumed that Figure 9 The structure of base station #1 of 901_1 is Figure 1A 、 Figure 1B 、 Figure 1C In addition, let Figure 1A 、 Figure 1B 、 Figure 1C The base station #1 of the structure 901_1 has Figure 3 The structure is the transmitting panel antenna xi of 106_xi. However, the base station #1 of 901_1 is not limited to Figure 1A 、 Figure 1B 、 Figure 1C The structure, in addition, has Figure 1A 、 Figure 1B 、 Figure 1C The structure of the transmitting panel antenna xi of the base station #1 106_xi of the structure 901_1 is not limited to Figure 3 .

[0685] Figure 11 Shown Figure 9 Base station #1 sends Figure 23 An example of a sector scanning reference signal 1001. Figure 11 The operation has been described, so the description is omitted.

[0686] Figure 12 Shown Figure 11 The structure example of "sector scanning reference signal 1101_i in transmitting panel antenna i". Figure 12 The operation has been described, so the description is omitted.

[0687] Figure 13 The example of the operation of the terminal response period, that is, the time period from time t1 to time t2, is shown. Figure 13 The operation has been described, so the description is omitted.

[0688] Figure 14 Shown with Figure 13 The example of the terminal's occupancy is shown as follows: the first transmission interval 1301_1 of the "sector scan reference signal" for the terminal, the second transmission interval 1301_2 of the "sector scan reference signal" for the terminal, the third transmission interval 1301_3 of the "sector scan reference signal" for the terminal, and the fourth transmission interval 1301_4 of the "sector scan reference signal" for the terminal. Figure 14 The actions of have been described, so different parts of the actions in this embodiment will be described.

[0689] Set as, Figure 9 For example, the terminal #1 of 902_1 wants to receive multiple modulated signals from the base station #1 of 901_1. Figure 9 Terminal #1 of 902_1 wants to receive two modulated signals from base station #1 of 901_1. In this case, Figure 9 Terminal #1 of 902_1 receives sector scanning reference signal 1001 transmitted by base station #1 of 901_1, and estimates two "transmitting panel antennas and parameter numbers" with good reception quality among the transmitting panel antennas of base station #1 of 901_1.

[0690] In this case, the two "transmitting panel antennas and parameter numbers" with good reception quality are referred to as "transmitting panel antenna and parameter number" 1 and "transmitting panel antenna and parameter number" 2. Furthermore, the "transmitting panel antenna with the first 'transmitting panel antenna and parameter number'" and the "transmitting panel antenna with the second 'transmitting panel antenna and parameter number'" are assumed to be different.

[0691] at this time, Figure 9 The terminal #1 of 902_1 selects the first frequency (band) together with the first "transmitting panel antenna and parameter number". Figure 9 Terminal #1 of 902_1 selects the second frequency (band) together with the second "transmitting panel antenna and parameter number." The first frequency (band) and the second frequency (band) may be the same or different, or may have some of the same frequencies.

[0692] In addition, this estimation can be performed by obtaining the sector scanning reference signal 1001 and the "ID (identification) of the transmitting panel antenna" and the "ID (identification) of the parameter used for beamforming (directivity control)" contained in the sector scanning reference signal 1001. Specifically, the base station #1 of 901_1 transmits Figure 11 The sector scanning reference signal is received by terminal #1 of 902_1. Figure 11 The above content is implemented by using a reference signal for sector scanning.

[0693] Assume that, for example, terminal #1 of 902_1 estimates "transmitting panel antenna a1_1 and parameter b1_1" and "transmitting panel antenna a1_2 and parameter b1_2" as two "transmitting panel antennas and parameters" with good reception quality. (In addition, the following uses Figure 28A 、 Figure 28B 、 Figure 29A 、 Figure 29B When explaining, "Transmitting panel antenna a1_1" is set to Figure 1A 、 Figure 1B 、 Figure 1C The transmitting panel antenna 1 of 106_1 (base station #1 of 901_1) sets the "transmitting panel antenna a1_2" to Figure 1A 、 Figure 1B 、 Figure 1C Transmitting panel antenna 2 of 106_2 (of base station #1 of 901_1). (Frequency (band) estimation is also performed together with "transmitting panel antenna a1_1 and parameter b1_1." Similarly, frequency (band) estimation is performed together with "transmitting panel antenna a1_2 and parameter b1_2.")

[0694] In addition, while estimating the "transmitting panel antenna and parameters" with good reception quality, terminal #1 of 902_1 obtains the information of "the number of time slots in which the reference signal for sector scanning can be sent when the terminal sends the reference signal for sector scanning (the number of terminals that can send the reference signal for sector scanning)". Figure 14 In the example, terminal #1 of 902_1 obtains the information that "when the terminal transmits a reference signal for sector scanning, the number of time divisions in which the reference signal for sector scanning can be transmitted" is 4.

[0695] In this case, the terminal #1 of 902_1 uses a random number to obtain a value such as "0", "1", "2", or "3". For example, suppose 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 Figure 14 The "terminal uses the sector scanning reference signal" first (= "0" + 1) transmission interval 1301_1" to transmit the terminal #1 "sector scanning reference signal" 1401_1. (Refer to Figure 14 )(Assume that the terminal #1 "sector scanning reference signal" 1401_1 exists in the frequency band )

[0696] In addition, it is assumed that the "sector scanning reference signal" 1401_1 of terminal #1 includes the information of the "transmitting panel antenna and parameters" with good reception quality obtained by terminal #1 of 902_1, that is, the information of "transmitting panel antenna a1_1 and parameter b1_1", and the information of "transmitting panel antenna a1_2 and parameter b1_2". In addition, the sector scanning reference signal 1401_1 may also include the request information of "the number of modulated signals (streams) that terminal #1 of 902_1 wants base station #1 of 901_1 to transmit" (here "2"). Moreover, the "sector scanning reference signal" 1401_1 of terminal #1 includes the information of the frequency (frequency band) corresponding to the information of "transmitting panel antenna a1_1 and parameter b1_1" (here "frequency band"). ), information on the frequency (band) corresponding to the information of "sending panel antenna a1_2 and parameter b1_2" (here, the band ).

[0697] The information and transmission status of the sector scanning reference signal sent by other terminals have been used in other embodiments. Figure 14Since this has been explained, the explanation is omitted. Furthermore, the sector scanning reference signal sent by other terminals may also include a request for the number of modulated signals (streams) that base station #1 of 901_1 wants to transmit. For example, if the number of modulated signals (streams) that base station #1 of 901_1 wants to transmit is "1," this information will be included. (The number of modulated signals (streams) that base station #1 of 901_1 wants to transmit will be set to "1" or higher.)

[0698] This reduces collisions between sector-scanning reference signals sent by each terminal, thereby increasing the number of sector-scanning reference signals that the base station can receive, thereby increasing the number of terminals that can communicate with the base station. Furthermore, in this manner, the base station can transmit one or more modulated signals (streams) to each terminal.

[0699] For used Figure 14 The structure of the terminal #i "sector scanning reference signal" 1401_i transmitted by the terminal #i of 902_i will be described. In addition, for the sake of simplicity, it is assumed that the terminal #i of 902_i has Figure 1A 、 Figure 1B 、 Figure 1C In addition, let Figure 1A 、 Figure 1B 、 Figure 1C The terminal #i of the structure 902_i has Figure 3 However, the structure of the terminal #i of 902_i is not limited to Figure 1A 、 Figure 1B 、 Figure 1C The structure, in addition, has Figure 1A 、 Figure 1B 、 Figure 1C The structure of the transmitting panel antenna xi of the terminal #i 106_xi of the structure 902_i is not limited to Figure 3 .

[0700] For example, with Figure 1A 、 Figure 1B 、 Figure 1C The terminal #i of the structure 902_i is as follows Figure 14 As shown, the terminal #i "sector scanning reference signal" 1401_i is transmitted. The structure and information included in the terminal #i "sector scanning reference signal" 1401_i have been used in other embodiments. Figure 15A 、 Figure 15B The description has been given, so the description is omitted.

[0701] A plurality of examples are described below.

[0702] <Example 1>

[0703] Figure 28A 、 Figure 28B Shown to exist Figure 27 An example of the structure of the feedback signal group 2702 sent by the base station #1 of 901_1 in the time interval from t2 to t3. Figure 28A 、 Figure 28B In the example, the horizontal axis is time and the vertical axis is frequency. In addition, for the sake of simplicity, it is assumed that the base station #1 of 901_1 has four transmission panel antennas, namely, 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. Figure 28A 、 Figure 28B In, with Figure 16A Similarly, the feedback signal group 2702 includes the first transmission interval, the second transmission interval, the third transmission interval, and the fourth transmission interval, and the frequency band frequency band frequency band

[0704] in addition, Figure 28A 、 Figure 28B In this article, only the feedback signal sent to terminal #1 of 902_1 is described. Figure 28A 、 Figure 28B Although not described, there may be feedback signals sent to terminals other than terminal #1 of 902_1.

[0705] In this example, since the number of time divisions in which the terminal can transmit the reference signal for sector scanning is 4, in the feedback signal group 2702, Figure 28A As shown, the feedback signal (1) sent by 2811_11 to terminal #1 exists in the frequency band of the first transmission interval. like Figure 28B As shown, the feedback signal (2) sent to terminal #1 by 2811_12 exists in the frequency band of the first transmission interval.

[0706] The term "feedback signal group" is used for explanation because, within the same frequency band and transmission interval, the feedback signal transmitted from the transmitting panel antenna 1 of 106_1 can be included therein, the feedback signal transmitted from the transmitting panel antenna 2 of 106_2 can be included therein, the feedback signal transmitted from the transmitting panel antenna 3 of 106_3 can be included therein, and the feedback signal transmitted from the transmitting panel antenna 4 of 106_4 can be included therein.

[0707] For example, at terminal #1 of 902_1, Figure 14As shown, when the sector scanning reference signal 1401_1 is transmitted, the base station #1 of 901_1 transmits the following signal to the terminal #1 of 902_1: Figure 28A The frequency band present in the first transmission interval is shown "2811_11's feedback signal to terminal #1 (1)", and Figure 28B The frequency band present in the first transmission interval is shown "Feedback signal (2) from 2811_12 to terminal #1". In this case, it is assumed that "Feedback signal (1) from 2811_11 to terminal #1" is transmitted from antenna 1 of the transmitting panel of 106_1 of base station #1 of 901_1, and "Feedback signal (2) from 2811_12 to terminal #1" is transmitted from antenna 2 of the transmitting panel of 106_2 of base station #1 of 901_1.

[0708] As mentioned above, there are "feedback signal (1) sent to terminal #1 by 2811_11" and "feedback signal (2) sent to terminal #1 by 2811_12" because "base station #1 of 901_1 sends two modulated signals (streams) to terminal #1 of 902_1."

[0709] At this time, it is assumed that the "feedback signal (1) sent to terminal #1 by 2811_11" includes, for example, information that terminal #1 of 902_1 (and base station #1 of 901_1) can communicate using the transmitting panel antenna 1 of 106_1.

[0710] Furthermore, it is assumed that the "feedback signal (2) to terminal #1 of 2811_12" includes, for example, information that terminal #1 of 902_1 (and base station #1 of 901_1) can communicate using the transmitting panel antenna 2 of 106_2.

[0711] In addition, based on the "information of two 'transmitting panel antennas and parameters' with good reception quality and frequency (band) information of base station #1 of 901_1" sent by terminal #1 of 902_1, base station #1 of 901_1 selects a transmitting panel antenna, sets the parameters of beamforming, and sends the following information to terminal #1 of 902_1: Figure 28A The frequency band present in the first transmission interval is shown "2811_11's feedback signal to terminal #1 (1)", and Figure 28B The frequency band present in the first transmission interval is shown "Feedback signal (2) sent to terminal #1 from 2811_12".

[0712] also, Figure 28A 、 Figure 28BThere may also be feedback signals sent to terminals other than terminal #1 of 902_1. (For example, refer to Figure 16B )

[0713] In addition, in the above example, as shown in FIG28A, Figure 28B As shown, the example of base station #1 of 901_1 sending "feedback signal (1) sent to terminal #1 of 2811_11" and "feedback signal (2) sent to terminal #1 of 2811_12" is shown to terminal #1 of 902_1. However, it is also possible that base station #1 of 901_1 sends more than 3 feedback signals to terminal #1 of 902_1.

[0714] Figure 29A 、 Figure 29B Shown to exist Figure 27 An example of the structure of the frame group 2703 including data symbols transmitted by the base station #1 of 901_1 in the time interval from t4 to t5. Figure 29A 、 Figure 29B In , the horizontal axis is time and the vertical axis is frequency. Figure 29A 、 Figure 29B In, with Figure 17A Similarly, the frame group 2703 including the data symbol has the first transmission interval, the second transmission interval, the third transmission interval, and the fourth transmission interval, and there is a frequency band frequency band frequency band

[0715] In addition, Figure 29A 、 Figure 29B In the example, the modulation signal (time slot) of terminal #1 of 902_1 is described. Figure 29A 、 Figure 29B Although not described, there may also be modulated signals (time slots) sent to terminals other than terminal #1 of 902_1.

[0716] In this example, since the number of time divisions in which the terminal can transmit the reference signal for sector scanning is 4, in the frame group 2703 including the data symbols, Figure 29A As shown, the modulated signal (time slot) (1) sent to terminal #1 by 2911_11 exists in the frequency band of the first transmission interval. like Figure 29B As shown, the modulated signal (time slot) (2) sent to terminal #1 by 2911_12 exists in the frequency band of the first transmission interval.

[0717] In addition, it is called a "frame group containing data codewords" because, in the same frequency band and the same transmission interval, the "frame containing data codewords" sent from the transmitting panel antenna 1 of 106_1 can exist in it, the "frame containing data codewords" sent from the transmitting panel antenna 2 of 106_2 can exist in it, the "frame containing data codewords" sent from the transmitting panel antenna 3 of 106_3 can exist in it, and the "frame containing data codewords" sent from the transmitting panel antenna 4 of 106_4 can exist in it.

[0718] For example, at terminal #1 of 902_1, Figure 14 As shown, when the sector scanning reference signal 1401_1 is transmitted, the base station #1 of 901_1 transmits the following signal to the terminal #1 of 902_1: Figure 29A The frequency band present in the first transmission interval is shown "2911_11's modulated signal (time slot) (1) sent to terminal #1", and Figure 29B The frequency band present in the first transmission interval is shown "2911_12's modulated signal (time slot) (2) to terminal #1". At this time, it is assumed that "2911_11's modulated signal (time slot) (1) to terminal #1" is transmitted from the transmitting panel antenna 1 of 106_1 of the base station #1 of 901_1, and "2911_12's modulated signal (time slot) (2) to terminal #1" is transmitted from the transmitting panel antenna 2 of 106_2 of the base station #1 of 901_1.

[0719] As mentioned above, there are "modulated signal (time slot) (1) sent to terminal #1 of 2911_11" and "modulated signal (time slot) (2) sent to terminal #1 of 2911_12". This is because "base station #1 of 901_1 sends two modulated signals (streams) to terminal #1 of 902_1".

[0720] At this time, it is assumed that "modulated signal (time slot) (1) sent to terminal #1 of 2911_11" includes data codewords (data, information) sent to terminal #1 of 902_1, for example.

[0721] In addition, it is assumed that the "modulated signal (time slot) (2) sent to terminal #1 of 2911_12" also includes data codewords (data, information) sent to terminal #1 of 902_1, for example.

[0722] In addition, based on the "information of two 'transmitting panel antennas and parameters' with good reception quality and frequency (band) information of base station #1 of 901_1" sent by terminal #1 of 902_1, base station #1 of 901_1 selects a transmitting panel antenna, sets the parameters of beamforming, and sends the following information to terminal #1 of 902_1: Figure 29A The frequency band present in the first transmission interval is shown "2911_11's modulated signal (time slot) (1) sent to terminal #1", and Figure 29B The frequency band present in the first transmission interval is shown "2911_12's modulated signal (time slot) (2) sent to terminal #1".

[0723] In addition, Figure 29A 、 Figure 29B In the example, there may be modulated signals (time slots) sent to terminals other than terminal #1 of 902_1. (For example, refer to Figure 17B )

[0724] In addition, in the above example, as shown in FIG29A, Figure 29B As shown, the example of base station #1 of 901_1 sending "modulation signal (time slot) (1) of 2911_11 to terminal #1" and "modulation signal (time slot) (2) of 2911_12 to terminal #1" is shown to terminal #1 of 902_1. However, it is also possible that base station #1 of 901_1 sends more than 3 modulation signals (time slots) to terminal #1 of 902_1 (using multiple modulation signals (time slots) using the same frequency resource).

[0725] Furthermore, in the transmission frames "2911_11's modulated signal (time slot) (1) for terminal #1" and "2911_12's modulated signal (time slot) (2) for terminal #1," in addition to data symbols, for example, "reference signals such as DMRS, PTRS, and SRS," pilot symbols, pilot signals, preambles, and symbols containing control information may also be included. Symbols containing control information may include information on the terminal being the destination (an ID that can identify the terminal), a modulation signal transmission method, information on a modulation scheme, information on an error correction coding scheme (code length, coding rate, etc.), and information on the MCS.

[0726] <Example 2>

[0727] Figure 30A 、 Figure 30B Shown to exist Figure 27 An example of the structure of the feedback signal group 2702 sent by the base station #1 of 901_1 in the time interval from t2 to t3. Figure 30A 、 Figure 30B In the example, the horizontal axis is time and the vertical axis is frequency. In addition, for the sake of simplicity, it is assumed that the base station #1 of 901_1 has four transmission panel antennas, namely, 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. Figure 30A 、 Figure 30B In, with Figure 16A Similarly, the feedback signal group 2702 includes the first transmission interval, the second transmission interval, the third transmission interval, and the fourth transmission interval, and the frequency band frequency band frequency band

[0728] in addition, Figure 30A 、 Figure 30B In this article, only the feedback signal sent to terminal #1 of 902_1 is described. Figure 30A 、 Figure 30B Although not described, there may be feedback signals sent to terminals other than terminal #1 of 902_1.

[0729] In this example, since the number of time divisions in which the terminal can transmit the reference signal for sector scanning is 4, in the feedback signal group 2702, Figure 30A As shown, the feedback signal (1) sent by 3011_11 to terminal #1 exists in the frequency band of the first transmission interval. like Figure 30B As shown, the feedback signal (2) sent to terminal #1 by 3011_12 exists in the frequency band of the first transmission interval.

[0730] For example, at terminal #1 of 902_1, Figure 14 As shown, when the sector scanning reference signal 1401_1 is transmitted, the base station #1 of 901_1 transmits the following signal to the terminal #1 of 902_1: Figure 30A The frequency band present in the first transmission interval is shown "3011_11's feedback signal (1) to terminal #1", and Figure 30B The frequency band present in the first transmission interval is shown "Feedback signal (2) from 3011_12 to terminal #1". At this time, it is assumed that "Feedback signal (1) from 3011_11 to terminal #1" is sent from the transmitting panel antenna 1 of 106_1 of base station #1 of 901_1, and "Feedback signal (2) from 3011_12 to terminal #1" is sent from the transmitting panel antenna 2 of 106_2 of base station #1 of 901_1.

[0731] As mentioned above, there are "feedback signal (1) sent to terminal #1 from 3011_11" and "feedback signal (2) sent to terminal #1 from 3011_12" because "base station #1 of 901_1 sends two modulated signals (streams) to terminal #1 of 902_1".

[0732] At this time, it is assumed that the "feedback signal (1) sent to terminal #1 from 3011_11" includes, for example, information that terminal #1 of 902_1 (and base station #1 of 901_1) can communicate using the transmitting panel antenna 1 of 106_1.

[0733] Furthermore, it is assumed that the "feedback signal (2) to terminal #1 from 3011_12" includes, for example, information that terminal #1 from 902_1 (and base station #1 from 901_1) can communicate using the transmitting panel antenna 2 from 106_2.

[0734] In addition, based on the "information of two 'transmitting panel antennas and parameters' with good reception quality and frequency (band) information of base station #1 of 901_1" sent by terminal #1 of 902_1, base station #1 of 901_1 selects a transmitting panel antenna, sets the parameters of beamforming, and sends the following information to terminal #1 of 902_1: Figure 30A The frequency band present in the first transmission interval is shown "3011_11's feedback signal (1) to terminal #1", and Figure 30B The frequency band present in the first transmission interval is shown "Feedback signal (2) sent to terminal #1 from 3011_12".

[0735] also, Figure 30A 、 Figure 30B There may also be feedback signals sent to terminals other than terminal #1 of 902_1. (For example, refer to Figure 16B )

[0736] In addition, in the above example, 30A, Figure 30B As shown, the example of base station #1 of 901_1 sending "feedback signal (1) sent to terminal #1 of 3011_11" and "feedback signal (2) sent to terminal #1 of 3011_12" is shown to terminal #1 of 902_1. However, it is also possible that base station #1 of 901_1 sends more than three feedback signals to terminal #1 of 902_1.

[0737] Figure 31A 、 Figure 31B Shown to exist Figure 27 An example of the structure of the frame group 2703 including data symbols transmitted by the base station #1 of 901_1 in the time interval from t4 to t5. Figure 31A 、 Figure 31B In , the horizontal axis is time and the vertical axis is frequency. Figure 31A 、 Figure 31B In, with Figure 17ASimilarly, the frame group 2703 including the data symbol has the first transmission interval, the second transmission interval, the third transmission interval, and the fourth transmission interval, and there is a frequency band frequency band frequency band

[0738] In addition, Figure 31A 、 Figure 31B In the example, the modulation signal (time slot) sent to the terminal #1 of 902_1 is described. Figure 31A 、 Figure 31B Although not described, there may also be modulated signals (time slots) sent to terminals other than terminal #1 of 902_1.

[0739] In this example, since the number of time divisions in which the terminal can transmit the reference signal for sector scanning is 4, in the frame group 2703 including the data symbols, Figure 31A As shown, the modulated signal (time slot) (1) sent to terminal #1 by 3111_11 exists in the frequency band of the first transmission interval. like Figure 31B As shown, the modulated signal (time slot) (2) sent to terminal #1 by 3111_12 exists in the frequency band of the first transmission interval.

[0740] For example, at terminal #1 of 902_1, Figure 14 As shown, when the sector scanning reference signal 1401_1 is transmitted, the base station #1 of 901_1 transmits the following signal to the terminal #1 of 902_1: Figure 31A The frequency band present in the first transmission interval is shown "3111_11's modulated signal (time slot) (1) sent to terminal #1", and Figure 31B The frequency band present in the first transmission interval is shown "3111_12's modulated signal (time slot) (2) to terminal #1". At this time, it is assumed that "3111_11's modulated signal (time slot) (1) to terminal #1" is transmitted from the transmitting panel antenna 1 of 106_1 of the base station #1 of 901_1, and "3111_12's modulated signal (time slot) (2) to terminal #1" is transmitted from the transmitting panel antenna 2 of 106_2 of the base station #1 of 901_1.

[0741] As mentioned above, there are "modulated signal (time slot) (1) sent to terminal #1 by 3111_11" and "modulated signal (time slot) (2) sent to terminal #1 by 3111_12". This is because "base station #1 of 901_1 sends two modulated signals (streams) to terminal #1 of 902_1".

[0742] At this time, it is assumed that "modulated signal (time slot) (1) sent to terminal #1 of 3111_11" includes data codewords (data, information) sent to terminal #1 of 902_1, for example.

[0743] In addition, it is assumed that the "modulated signal (time slot) (2) sent to terminal #1 of 3111_12" also includes data codewords (data, information) sent to terminal #1 of 902_1, for example.

[0744] In addition, based on the "information of two 'transmitting panel antennas and parameters' with good reception quality and frequency (band) information of base station #1 of 901_1" sent by terminal #1 of 902_1, base station #1 of 901_1 selects a transmitting panel antenna, sets the parameters of beamforming, and sends the following information to terminal #1 of 902_1: Figure 31A The frequency band present in the first transmission interval is shown "3111_11's modulated signal (time slot) (1) sent to terminal #1", and Figure 31B The frequency band present in the first transmission interval is shown "3111_12's modulated signal (time slot) (2) sent to terminal #1".

[0745] In addition, Figure 31A 、 Figure 31B In the example, there may be modulated signals (time slots) sent to terminals other than terminal #1 of 902_1. (For example, refer to Figure 17B )

[0746] In addition, in the above example, 31A, Figure 31B As shown, the example of base station #1 of 901_1 sending "modulation signal (time slot) (1) sent to terminal #1 of 3111_11" and "modulation signal (time slot) (2) sent to terminal #1 of 902_1" is shown, but it can also be that base station #1 of 901_1 sends more than 3 modulation signals (time slots) to terminal #1 of 902_1 (modulation signals (time slots) using multiple frequency resources).

[0747] Furthermore, in addition to data symbols, "modulated signal (time slot) (1) for terminal #1 of 3111_11" and "modulated signal (time slot) (2) for terminal #1 of 3111_12" may also include, for example, "reference signals such as DMRS, PTRS, and SRS," pilot symbols, pilot signals, preambles, and symbols containing control information. Symbols containing control information may include information on the terminal to be transmitted (an ID that can identify the terminal), a transmission method for the modulated signal, information on the modulation scheme, information on the error correction coding scheme (code length, coding rate, etc.), and information on the MCS.

[0748] <Example 3>

[0749] Figure 32A 、 Figure 32B Shown to exist Figure 27 An example of the structure of the feedback signal group 2702 sent by the base station #1 of 901_1 in the time interval from t2 to t3. Figure 32A 、 Figure 32B In the example, the horizontal axis is time and the vertical axis is frequency. In addition, for the sake of simplicity, it is assumed that the base station #1 of 901_1 has four transmission panel antennas, namely, 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. Figure 32A 、 Figure 32B In, with Figure 16A Similarly, the feedback signal group 2702 includes the first transmission interval, the second transmission interval, the third transmission interval, and the fourth transmission interval, and the frequency band frequency band frequency band

[0750] in addition, Figure 32A 、 Figure 32B In this article, only the feedback signal sent to terminal #1 of 902_1 is described. Figure 32A 、 Figure 32B Although not described, there may be feedback signals sent to terminals other than terminal #1 of 902_1.

[0751] In this example, since the number of time divisions in which the terminal can transmit the reference signal for sector scanning is 4, in the feedback signal group 2702, Figure 32A As shown, the feedback signal (1) sent by 3211_11 to terminal #1 exists in the frequency band of the first transmission interval. like Figure 32B As shown, the feedback signal (2) sent to terminal #1 by 3211_12 exists in the frequency band of the third transmission interval.

[0752] For example, at terminal #1 of 902_1, Figure 14 As shown, when the sector scanning reference signal 1401_1 is transmitted, the base station #1 of 901_1 transmits the following signal to the terminal #1 of 902_1: Figure 32A The frequency band present in the first transmission interval is shown The "feedback signal (1) sent to terminal #1 by 3211_11" and Figure 32B The frequency band present in the third transmission interval is shown "Feedback signal (2) from 3211_12 to terminal #1". At this time, it is assumed that "Feedback signal (1) from 3211_11 to terminal #1" is transmitted from the transmitting panel antenna 1 of 106_1 of base station #1 of 901_1, and "Feedback signal (2) from 3211_12 to terminal #1" is transmitted from the transmitting panel antenna 2 of 106_2 of base station #1 of 901_1.

[0753] As mentioned above, there are "feedback signal (1) sent to terminal #1 from 3211_11" and "feedback signal (2) sent to terminal #1 from 3211_12" because "base station #1 of 901_1 sends two modulated signals (streams) to terminal #1 of 902_1."

[0754] At this time, it is assumed that the "feedback signal (1) to terminal #1 from 3211_11" includes, for example, information that terminal #1 from 902_1 (and base station #1 from 901_1) can communicate using the transmitting panel antenna 1 from 106_1.

[0755] Furthermore, it is assumed that the "feedback signal (2) to terminal #1 of 3211_12" includes, for example, information that terminal #1 of 902_1 (and base station #1 of 901_1) can communicate using the transmitting panel antenna 2 of 106_2.

[0756] In addition, based on the "information of two 'transmitting panel antennas and parameters' with good reception quality and frequency (band) information of base station #1 of 901_1" sent by terminal #1 of 902_1, base station #1 of 901_1 selects a transmitting panel antenna, sets the parameters of beamforming, and sends the following information to terminal #1 of 902_1: Figure 32A The frequency band present in the first transmission interval is shown The "feedback signal (1) sent to terminal #1 by 3211_11" and Figure 32B The frequency band present in the third transmission interval is shown "Feedback signal (2) sent to terminal #1 from 3211_12".

[0757] also, Figure 32A 、 Figure 32B There may also be feedback signals sent to terminals other than terminal #1 of 902_1. (For example, refer to Figure 16B )

[0758] In addition, in the above example, as shown in FIG32A, Figure 32B As shown, the example of base station #1 of 901_1 sending "feedback signal (1) sent to terminal #1 of 3211_11" and "feedback signal (2) sent to terminal #1 of 3211_12" is shown to terminal #1 of 902_1. However, it is also possible that base station #1 of 901_1 sends more than three feedback signals to terminal #1 of 902_1.

[0759] Figure 33A 、 Figure 33B Shown to exist Figure 27 An example of the structure of the frame group 2703 including data symbols transmitted by the base station #1 of 901_1 in the time interval from t4 to t5. Figure 33A 、 Figure 33B In , the horizontal axis is time and the vertical axis is frequency. Figure 33A 、 Figure 33B In, with Figure 17A Similarly, the frame group 2703 including the data symbol has the first transmission interval, the second transmission interval, the third transmission interval, and the fourth transmission interval, and there is a frequency band frequency band frequency band

[0760] In addition, Figure 33A 、 Figure 33B In the example, the modulation signal (time slot) sent to the terminal #1 of 902_1 is described. Figure 33A 、 Figure 33B Although not described, there may also be modulated signals (time slots) sent to terminals other than terminal #1 of 902_1.

[0761] In this example, since the number of time divisions in which the terminal can transmit the reference signal for sector scanning is 4, in the frame group 2703 including the data symbols, Figure 33A As shown, the modulated signal (time slot) (1) sent by 3311_11 to terminal #1 exists in the frequency band of the first transmission interval. like Figure 33B As shown, the modulated signal (time slot) (2) sent to terminal #1 by 3311_12 exists in the frequency band of the third transmission interval.

[0762] For example, at terminal #1 of 902_1, Figure 14As shown, when the sector scanning reference signal 1401_1 is transmitted, the base station #1 of 901_1 transmits the following signal to the terminal #1 of 902_1: Figure 33A The frequency band present in the first transmission interval is shown "3311_11's modulated signal (time slot) (1) sent to terminal #1", and Figure 33B The frequency band present in the third transmission interval is shown "3311_12's modulated signal (time slot) (2) to terminal #1". At this time, it is assumed that "3311_11's modulated signal (time slot) (1) to terminal #1" is transmitted from the transmitting panel antenna 1 of 106_1 of base station #1 of 901_1, and "3311_12's modulated signal (time slot) (2) to terminal #1" is transmitted from the transmitting panel antenna 2 of 106_2 of base station #1 of 901_1.

[0763] As mentioned above, there are "modulated signal (time slot) (1) sent to terminal #1 by 3311_11" and "modulated signal (time slot) (2) sent to terminal #1 by 3311_12". This is because "base station #1 of 901_1 sends two modulated signals (streams) to terminal #1 of 902_1".

[0764] At this time, it is assumed that "modulated signal (time slot) (1) sent to terminal #1 of 3311_11" includes data codewords (data, information) sent to terminal #1 of 902_1, for example.

[0765] In addition, it is assumed that the "modulated signal (time slot) (2) sent to terminal #1 of 3311_12" also includes data codewords (data, information) sent to terminal #1 of 902_1, for example.

[0766] In addition, based on the "information of two 'transmitting panel antennas and parameters' with good reception quality and frequency (band) information of base station #1 of 901_1" sent by terminal #1 of 902_1, base station #1 of 901_1 selects a transmitting panel antenna, sets the parameters of beamforming, and sends the following information to terminal #1 of 902_1: Figure 33A The frequency band present in the first transmission interval is shown "3311_11's modulated signal (time slot) (1) sent to terminal #1", and Figure 33B The frequency band present in the third transmission interval is shown "3311_12's modulated signal (time slot) (2) sent to terminal #1".

[0767] In addition, Figure 33A 、 Figure 33B In the example, there may be modulated signals (time slots) sent to terminals other than terminal #1 of 902_1. (For example, refer to Figure 17B )

[0768] In addition, in the above example, as shown in FIG33A, Figure 33B As shown, the example of base station #1 of 901_1 sending "modulation signal (time slot) (1) sent to terminal #1 of 3311_11" and "modulation signal (time slot) (2) sent to terminal #1 of 902_1" is shown, but it can also be that base station #1 of 901_1 sends more than 3 modulation signals (time slots) to terminal #1 of 902_1 (modulation signals (time slots) using multiple time resources).

[0769] Furthermore, in addition to data symbols, "modulated signal (time slot) (1) for terminal #1 of 3311_11" and "modulated signal (time slot) (2) for terminal #1 of 3311_12" may also include, for example, "reference signals such as DMRS, PTRS, and SRS," pilot symbols, pilot signals, preambles, and symbols containing control information. Symbols containing control information may include information on the terminal to be transmitted (an ID that can identify the terminal), a transmission method for the modulated signal, information on the modulation scheme, information on the error correction coding scheme (code length, coding rate, etc.), and information on the MCS.

[0770] <Example 4>

[0771] Figure 34A 、 Figure 34B Shown to exist Figure 27 An example of the structure of the feedback signal group 2702 sent by the base station #1 of 901_1 in the time interval from t2 to t3. Figure 34A 、 Figure 34B In the example, the horizontal axis is time and the vertical axis is frequency. In addition, for the sake of simplicity, it is assumed that the base station #1 of 901_1 has four transmission panel antennas, namely, 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. Figure 34A 、 Figure 34B In, with Figure 16A Similarly, the feedback signal group 2702 includes the first transmission interval, the second transmission interval, the third transmission interval, and the fourth transmission interval, and the frequency band frequency band frequency band

[0772] in addition, Figure 34A 、 Figure 34B In this article, only the feedback signal sent to terminal #1 of 902_1 is described. Figure 34A 、 Figure 34BAlthough not described, there may be feedback signals sent to terminals other than terminal #1 of 902_1.

[0773] In this example, since the number of time divisions during which the terminal can transmit the reference signal for sector scanning is 4, in the feedback signal group 2702, Figure 34A As shown, the feedback signal (1) sent by 3411_11 to terminal #1 exists in the frequency band of the first transmission interval. like Figure 34B As shown, the feedback signal (2) sent by 3411_12 to terminal #1 exists in the frequency band of the third transmission interval.

[0774] For example, at terminal #1 of 902_1, Figure 14 As shown, when the sector scanning reference signal 1401_1 is transmitted, the base station #1 of 901_1 transmits the following signal to the terminal #1 of 902_1: Figure 34A The frequency band present in the first transmission interval is shown The "feedback signal (1) sent to terminal #1 by 3411_11" and Figure 34B The frequency band present in the third transmission interval is shown "Feedback signal (2) from 3411_12 to terminal #1". At this time, it is assumed that "Feedback signal (1) from 3411_11 to terminal #1" is transmitted from the transmitting panel antenna 1 of 106_1 of base station #1 of 901_1, and "Feedback signal (2) from 3411_12 to terminal #1" is transmitted from the transmitting panel antenna 2 of 106_2 of base station #1 of 901_1.

[0775] As mentioned above, there are "feedback signal (1) sent to terminal #1 from 3411_11" and "feedback signal (2) sent to terminal #1 from 3411_12" because "base station #1 of 901_1 sends two modulated signals (streams) to terminal #1 of 902_1."

[0776] At this time, it is assumed that the "feedback signal (1) from 3411_11 to terminal #1" includes, for example, information that terminal #1 at 902_1 (and base station #1 at 901_1) can communicate using the transmitting panel antenna 1 at 106_1.

[0777] Furthermore, it is assumed that the "feedback signal (2) to terminal #1 from 3411_12" includes, for example, information that terminal #1 from 902_1 (and base station #1 from 901_1) can communicate using the transmitting panel antenna 2 from 106_2.

[0778] In addition, based on the "information of two 'transmitting panel antennas and parameters' with good reception quality and frequency (band) information of base station #1 of 901_1" sent by terminal #1 of 902_1, base station #1 of 901_1 selects a transmitting panel antenna, sets the parameters of beamforming, and sends the following information to terminal #1 of 902_1: Figure 34A The frequency band present in the first transmission interval is shown The "feedback signal (1) sent to terminal #1 by 3411_11" and Figure 34B The frequency band present in the third transmission interval is shown "Feedback signal (2) sent to terminal #1 from 3411_12".

[0779] also, Figure 34A 、 Figure 34B There may also be feedback signals sent to terminals other than terminal #1 of 902_1. (For example, refer to Figure 16B )

[0780] In addition, in the above example, as shown in FIG34A, Figure 34B As shown, the example of base station #1 of 901_1 sending "feedback signal (1) sent to terminal #1 of 3411_11" and "feedback signal (2) sent to terminal #1 of 3411_12" is shown to terminal #1 of 902_1. However, it is also possible that base station #1 of 901_1 sends more than three feedback signals to terminal #1 of 902_1.

[0781] Figure 35A 、 Figure 35B Shown to exist Figure 27 An example of the structure of the frame group 2703 including data symbols transmitted by the base station #1 of 901_1 in the time interval from t4 to t5. Figure 35A 、 Figure 35B In , the horizontal axis is time and the vertical axis is frequency. Figure 35A 、 Figure 35B In, with Figure 17A Similarly, the frame group 2703 including the data symbol has the first transmission interval, the second transmission interval, the third transmission interval, and the fourth transmission interval, and there is a frequency band frequency band frequency band

[0782] In addition, Figure 35A 、 Figure 35B In the example, the modulation signal (time slot) sent to the terminal #1 of 902_1 is described. Figure 35A 、 Figure 35B Although not described, there may also be modulated signals (time slots) sent to terminals other than terminal #1 of 902_1.

[0783] In this example, since the number of time divisions in which the terminal can transmit the reference signal for sector scanning is 4, in the frame group 2703 including the data symbols, Figure 35A As shown, the modulated signal (time slot) (1) sent to terminal #1 by 3511_11 exists in the frequency band of the first transmission interval. like Figure 35B As shown, the modulated signal (time slot) (2) sent to terminal #1 by 3511_12 exists in the frequency band of the third transmission interval.

[0784] For example, at terminal #1 of 902_1, Figure 14 As shown, when the sector scanning reference signal 1401_1 is transmitted, the base station #1 of 901_1 transmits the following signal to the terminal #1 of 902_1: Figure 35A The frequency band present in the first transmission interval is shown "3511_11's modulated signal (time slot) (1) sent to terminal #1", and Figure 35B The frequency band present in the third transmission interval is shown "3511_12's modulated signal (time slot) (2) to terminal #1". At this time, it is assumed that "3511_11's modulated signal (time slot) (1) to terminal #1" is transmitted from the transmitting panel antenna 1 of 106_1 of base station #1 of 901_1, and "3511_12's modulated signal (time slot) (2) to terminal #1" is transmitted from the transmitting panel antenna 2 of 106_2 of base station #1 of 901_1.

[0785] As mentioned above, there are "modulated signal (time slot) (1) sent to terminal #1 by 3511_11" and "modulated signal (time slot) (2) sent to terminal #1 by 3511_12", which is because "base station #1 of 901_1 sends two modulated signals (streams) to terminal #1 of 902_1".

[0786] At this time, it is assumed that "modulated signal (time slot) (1) sent to terminal #1 of 3511_11" includes data codewords (data, information) sent to terminal #1 of 902_1, for example.

[0787] In addition, it is assumed that the "modulated signal (time slot) (2) sent to terminal #1 of 3511_12" also includes data codewords (data, information) sent to terminal #1 of 902_1, for example.

[0788] In addition, based on the "information of two 'transmitting panel antennas and parameters' with good reception quality and frequency (band) information of base station #1 of 901_1" sent by terminal #1 of 902_1, base station #1 of 901_1 selects a transmitting panel antenna, sets the parameters of beamforming, and sends the following information to terminal #1 of 902_1: Figure 35A The frequency band present in the first transmission interval is shown "3511_11's modulated signal (time slot) (1) sent to terminal #1", and Figure 35B The frequency band present in the third transmission interval is shown "3511_12's modulated signal (time slot) (2) sent to terminal #1".

[0789] In addition, Figure 35A 、 Figure 35B In the example, there may be modulated signals (time slots) sent to terminals other than terminal #1 of 902_1. (For example, refer to Figure 17B )

[0790] In addition, in the above example, 35A, Figure 35B As shown, the example of base station #1 of 901_1 sending "modulation signal (time slot) (1) sent to terminal #1 of 3511_11" and "modulation signal (time slot) (2) sent to terminal #1 of 902_1" is shown, but it can also be that base station #1 of 901_1 sends more than 3 modulation signals (time slots) to terminal #1 of 902_1 (modulation signals (time slots) using multiple frequency and time resources).

[0791] Furthermore, in addition to data symbols, "modulated signal (time slot) (1) for terminal #1 of 3511_11" and "modulated signal (time slot) (2) for terminal #1 of 3511_12" may also include, for example, "reference signals such as DMRS, PTRS, and SRS," pilot symbols, pilot signals, preambles, and symbols containing control information. Symbols containing control information may include information on the terminal to be transmitted (an ID that can identify the terminal), a transmission method for the modulated signal, information on the modulation scheme, information on the error correction coding scheme (code length, coding rate, etc.), and information on the MCS.

[0792] <Example 5>

[0793] Figure 36 Shown to exist Figure 27 An example of the structure of the feedback signal group 2702 sent by the base station #1 of 901_1 in the time interval from t2 to t3. Figure 36In the example, the horizontal axis is time and the vertical axis is frequency. In addition, for the sake of simplicity, it is assumed that the base station #1 of 901_1 has four transmission panel antennas, namely, 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. Figure 36 In, with Figure 16A Similarly, the feedback signal group 2702 includes the first transmission interval, the second transmission interval, the third transmission interval, and the fourth transmission interval, and the frequency band frequency band frequency band

[0794] in addition, Figure 36 In this article, only the feedback signal sent to terminal #1 of 902_1 is described. Figure 36 Although not described, there may be feedback signals sent to terminals other than terminal #1 of 902_1.

[0795] In this example, since the number of time divisions during which the terminal can transmit the reference signal for sector scanning is 4, in the feedback signal group 2702, Figure 36 As shown, the feedback signal (1) sent by 3611_11 to terminal #1 exists in the frequency band of the first transmission interval. The feedback signal (2) sent to terminal #1 by 3611_12 exists in the frequency band of the first transmission interval.

[0796] For example, at terminal #1 of 902_1, Figure 14 As shown, when the sector scanning reference signal 1401_1 is transmitted, the base station #1 of 901_1 transmits the following signal to the terminal #1 of 902_1: Figure 36 The frequency band present in the first transmission interval is shown The "feedback signal (1) sent to terminal #1 by 3611_11" and the frequency band existing in the first transmission interval "Feedback signal (2) from 3611_12 to terminal #1". In this case, it is assumed that both "Feedback signal (1) from 3611_11 to terminal #1" and "Feedback signal (2) from 3611_12 to terminal #1" are transmitted from transmitting panel antenna 1 of 106_1 of base station #1 at 901_1. (That is, one transmitting panel antenna is selected.)

[0797] As described above, there are "feedback signal (1) sent to terminal #1 by 3611_11" and "feedback signal (2) sent to terminal #1 by 3611_12" because "base station #1 of 901_1 sends two resources (time slots) to terminal #1 of 902_1".

[0798] At this time, it is assumed that "feedback signal (1) sent to terminal #1 from 3611_11" and "feedback signal (2) sent to terminal #1 from 3611_12" include, for example, the information that terminal #1 of 902_1 (and base station #1 of 901_1) can use transmitting panel antenna 1 of 106_1 to communicate.

[0799] In addition, based on the "information of two 'transmitting panel antennas and parameters' with good reception quality and frequency (band) information of base station #1 of 901_1" sent by terminal #1 of 902_1, base station #1 of 901_1 selects a transmitting panel antenna, sets the parameters of beamforming, and sends the following information to terminal #1 of 902_1: Figure 36 The frequency band present in the first transmission interval is shown The "feedback signal (1) sent to terminal #1 by 3611_11" and the frequency band existing in the first transmission interval "Feedback signal (2) sent to terminal #1 from 3611_12".

[0800] also, Figure 36 There may also be feedback signals sent to terminals other than terminal #1 of 902_1. (For example, refer to Figure 16B )

[0801] In addition, in the above example, an example is shown in which the base station #1 of 901_1 sends "feedback signal (1) sent to terminal #1 of 3611_11" and "feedback signal (2) sent to terminal #1 of 3611_12" to terminal #1 of 902_1, as shown in 36, but it is also possible that the base station #1 of 901_1 sends more than three feedback signals to the terminal #1 of 902_1.

[0802] Figure 37 Shown to exist Figure 27 An example of the structure of the frame group 2703 including data symbols transmitted by the base station #1 of 901_1 in the time interval from t4 to t5. Figure 37 In , the horizontal axis is time and the vertical axis is frequency. Figure 37 In, with Figure 17A Similarly, the frame group 2703 including the data symbol has the first transmission interval, the second transmission interval, the third transmission interval, and the fourth transmission interval, and there is a frequency band frequency band frequency band

[0803] In addition, Figure 37 In the example, the modulation signal (time slot) sent to the terminal #1 of 902_1 is described. Figure 37Although not described, there may also be modulated signals (time slots) sent to terminals other than terminal #1 of 902_1.

[0804] In this example, since the number of time divisions in which the terminal can transmit the reference signal for sector scanning is 4, in the frame group 2703 including the data symbols, Figure 37 As shown, the modulated signal (time slot) (1) sent to terminal #1 by 3711_11 exists in the frequency band of the first transmission interval. The modulated signal (time slot) (2) sent to terminal #1 by 3711_12 exists in the frequency band of the first transmission interval.

[0805] For example, at terminal #1 of 902_1, Figure 14 As shown, when the sector scanning reference signal 1401_1 is transmitted, the base station #1 of 901_1 transmits the following signal to the terminal #1 of 902_1: Figure 37 The frequency band present in the first transmission interval is shown "3711_11's modulated signal (time slot) (1) to terminal #1" and the frequency band existing in the first transmission interval "3711_12's modulated signal (time slot) (2) for terminal #1". In this case, it is assumed that "3711_11's modulated signal (time slot) (1) for terminal #1" and "3711_12's modulated signal (time slot) (2) for terminal #1" are transmitted from the transmitting panel antenna 1 of 106_1 of base station #1 at 901_1. (That is, one transmitting panel antenna is selected.)

[0806] As mentioned above, there are "modulated signal (time slot) (1) sent to terminal #1 by 3711_11" and "modulated signal (time slot) (2) sent to terminal #1 by 3711_12", which is because "base station #1 of 901_1 sends two resources (time slots) to terminal #1 of 902_1".

[0807] At this time, it is assumed that "modulated signal (time slot) (1) sent to terminal #1 of 3711_11" and "modulated signal (time slot) (2) sent to terminal #1 of 3711_12" include data code elements (data, information) sent to terminal #1 of 902_1, for example.

[0808] In addition, based on the "information of two 'transmitting panel antennas and parameters' with good reception quality and frequency (band) information of base station #1 of 901_1" sent by terminal #1 of 902_1, base station #1 of 901_1 selects a transmitting panel antenna, sets the parameters of beamforming, and sends the following information to terminal #1 of 902_1: Figure 37 The frequency band present in the first transmission interval is shown "3711_11's modulated signal (time slot) (1) to terminal #1" and the frequency band existing in the first transmission interval "3711_12's modulated signal (time slot) (2) sent to terminal #1".

[0809] In addition, Figure 37 In the example, there may be modulated signals (time slots) sent to terminals other than terminal #1 of 902_1. (For example, refer to Figure 17B )

[0810] In addition, in the above example, an example is shown in which the base station #1 of 901_1 sends "the modulation signal (time slot) (1) of 3711_11 to the terminal #1" and "the modulation signal (time slot) (2) of 3711_12 to the terminal #1" to the terminal #1 of 902_1, as shown in 37, but it is also possible that the base station #1 of 901_1 sends more than 3 modulation signals (time slots) to the terminal #1 of 902_1 (modulation signals (time slots) using multiple frequency resources).

[0811] Furthermore, in addition to data symbols, "modulated signal (time slot) (1) for terminal #1 of 3711_11" and "modulated signal (time slot) (2) for terminal #1 of 3711_12" may also include, for example, "reference signals such as DMRS, PTRS, and SRS," pilot symbols, pilot signals, preambles, and symbols containing control information. Symbols containing control information may include information on the terminal to be transmitted (an ID that can identify the terminal), a transmission method for the modulated signal, information on the modulation scheme, information on the error correction coding scheme (code length, coding rate, etc.), and information on the MCS.

[0812] <Example 6>

[0813] Figure 38 Shown to exist Figure 27 An example of the structure of the feedback signal group 2702 sent by the base station #1 of 901_1 in the time interval from t2 to t3. Figure 38 In the example, the horizontal axis is time and the vertical axis is frequency. In addition, for the sake of simplicity, it is assumed that the base station #1 of 901_1 has four transmission panel antennas, namely, 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. Figure 38 In, with Figure 16A Similarly, the feedback signal group 2702 includes the first transmission interval, the second transmission interval, the third transmission interval, and the fourth transmission interval, and the frequency band frequency band frequency band

[0814] in addition, Figure 38 In this article, only the feedback signal sent to terminal #1 of 902_1 is described. Figure 38 Although not described, there may be feedback signals sent to terminals other than terminal #1 of 902_1.

[0815] In this example, since the number of time divisions in which the terminal can transmit the reference signal for sector scanning is 4, in the feedback signal group 2702, Figure 38 As shown, the feedback signal (1) sent by 3811_11 to terminal #1 exists in the frequency band of the first transmission interval. The feedback signal (2) sent to terminal #1 by 3811_12 exists in the frequency band of the third transmission interval.

[0816] For example, at terminal #1 of 902_1, Figure 14 As shown, when the sector scanning reference signal 1401_1 is transmitted, the base station #1 of 901_1 transmits the following signal to the terminal #1 of 902_1: Figure 38 The frequency band present in the first transmission interval is shown The "feedback signal (1) sent to terminal #1 by 3811_11" and the frequency band existing in the third transmission interval "Feedback signal (2) from 3811_12 to terminal #1". In this case, it is assumed that both "Feedback signal (1) from 3811_11 to terminal #1" and "Feedback signal (2) from 3811_12 to terminal #1" are transmitted from transmitting panel antenna 1 of 106_1 of base station #1 at 901_1. (That is, one transmitting panel antenna is selected.)

[0817] As described above, there are "feedback signal (1) sent to terminal #1 from 3811_11" and "feedback signal (2) sent to terminal #1 from 3811_12" because "base station #1 of 901_1 sends two resources (time slots) to terminal #1 of 902_1".

[0818] At this time, it is assumed that "feedback signal (1) sent to terminal #1 by 3811_11" and "feedback signal (2) sent to terminal #1 by 3811_12" include, for example, the information that terminal #1 of 902_1 (and base station #1 of 901_1) can use the transmitting panel antenna 1 of 106_1 to communicate.

[0819] In addition, based on the "information of two 'transmitting panel antennas and parameters' with good reception quality and frequency (band) information of base station #1 of 901_1" sent by terminal #1 of 902_1, base station #1 of 901_1 selects a transmitting panel antenna, sets the parameters of beamforming, and sends the following information to terminal #1 of 902_1: Figure 38 The frequency band present in the first transmission interval is shown The "feedback signal (1) sent to terminal #1 by 3811_11" and the frequency band existing in the third transmission interval "Feedback signal (2) sent to terminal #1 from 3811_12".

[0820] also, Figure 38 There may also be feedback signals sent to terminals other than terminal #1 of 902_1. (For example, refer to Figure 16B )

[0821] In addition, in the above example, as shown in 38, an example is shown in which the base station #1 of 901_1 sends "the feedback signal (1) sent to the terminal #1 of 3811_11" and "the feedback signal (2) sent to the terminal #1 of 3811_12" is sent to the terminal #1 of 902_1, but it is also possible that the base station #1 of 901_1 sends more than 3 feedback signals to the terminal #1 of 902_1.

[0822] Figure 39 Shown to exist Figure 27 An example of the structure of the frame group 2703 including data symbols transmitted by the base station #1 of 901_1 in the time interval from t4 to t5. Figure 39 In , the horizontal axis is time and the vertical axis is frequency. Figure 39 In, with Figure 17A Similarly, the frame group 2703 including the data symbol has the first transmission interval, the second transmission interval, the third transmission interval, and the fourth transmission interval, and there is a frequency band frequency band frequency band

[0823] In addition, Figure 39 In the example, the modulation signal (time slot) sent to the terminal #1 of 902_1 is described. Figure 39 Although not described, there may also be modulated signals (time slots) sent to terminals other than terminal #1 of 902_1.

[0824] In this example, since the number of time divisions in which the terminal can transmit the reference signal for sector scanning is 4, in the frame group 2703 including the data symbol, Figure 39As shown, the modulated signal (time slot) (1) sent to terminal #1 by 3911_11 exists in the frequency band of the first transmission interval. The modulated signal (time slot) (2) sent to terminal #1 from 3911_12 exists in the frequency band of the third transmission interval.

[0825] For example, at terminal #1 of 902_1, Figure 14 As shown, when the sector scanning reference signal 1401_1 is transmitted, the base station #1 of 901_1 transmits the following signal to the terminal #1 of 902_1: Figure 39 The frequency band present in the first transmission interval is shown "3911_11's modulated signal (time slot) (1) to terminal #1" and the frequency band existing in the third transmission interval "3911_12's modulated signal (time slot) (2) for terminal #1". In this case, it is assumed that "3911_11's modulated signal (time slot) (1) for terminal #1" and "3911_12's modulated signal (time slot) (2) for terminal #1" are transmitted from the transmitting panel antenna 1 of 106_1 of base station #1 at 901_1. (That is, one transmitting panel antenna is selected.)

[0826] As mentioned above, there are "modulated signal (time slot) (1) sent to terminal #1 by 3911_11" and "modulated signal (time slot) (2) sent to terminal #1 by 3911_12", which is because "base station #1 of 901_1 sends two resources (time slots) to terminal #1 of 902_1".

[0827] At this time, it is assumed that "modulated signal (time slot) (1) sent to terminal #1 of 3911_11" and "modulated signal (time slot) (2) sent to terminal #1 of 3911_12" include data code elements (data, information) sent to terminal #1 of 902_1, for example.

[0828] In addition, based on the "information of two 'transmitting panel antennas and parameters' with good reception quality and frequency (band) information of base station #1 of 901_1" sent by terminal #1 of 902_1, base station #1 of 901_1 selects a transmitting panel antenna, sets the parameters of beamforming, and sends the following information to terminal #1 of 902_1: Figure 39 The frequency band present in the first transmission interval is shown "3911_11's modulated signal (time slot) (1) to terminal #1" and the frequency band existing in the third transmission interval "3911_12's modulated signal (time slot) (2) sent to terminal #1".

[0829] In addition, Figure 39In the example, there may be modulated signals (time slots) sent to terminals other than terminal #1 of 902_1. (For example, refer to Figure 17B )

[0830] In addition, in the above example, an example is shown in which the base station #1 of 901_1 sends "the modulated signal (time slot) (1) of 3911_11 to the terminal #1" and "the modulated signal (time slot) (2) of 3911_12 to the terminal #1" as shown in 39, but it is also possible that the base station #1 of 901_1 sends more than 3 modulated signals (time slots) to the terminal #1 of 902_1 (modulated signals (time slots) using multiple time resources).

[0831] Furthermore, in addition to data symbols, "modulated signal (time slot) (1) for terminal #1 of 3911_11" and "modulated signal (time slot) (2) for terminal #1 of 3911_12" may also include, for example, "reference signals such as DMRS, PTRS, and SRS," pilot symbols, pilot signals, preambles, and symbols containing control information. Symbols containing control information may include information on the terminal to be transmitted (an ID that can identify the terminal), a transmission method for the modulated signal, information on the modulation scheme, information on the error correction coding scheme (code length, coding rate, etc.), and information on the MCS.

[0832] <Example 7>

[0833] Figure 40 Shown to exist Figure 27 An example of the structure of the feedback signal group 2702 sent by the base station #1 of 901_1 in the time interval from t2 to t3. Figure 40 In the example, the horizontal axis is time and the vertical axis is frequency. In addition, for the sake of simplicity, it is assumed that the base station #1 of 901_1 has four transmission panel antennas, namely, 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. Figure 40 In, with Figure 16A Similarly, the feedback signal group 2702 includes the first transmission interval, the second transmission interval, the third transmission interval, and the fourth transmission interval, and the frequency band frequency band frequency band

[0834] in addition, Figure 40 In this article, only the feedback signal sent to terminal #1 of 902_1 is described. Figure 40 Although not described, there may be feedback signals sent to terminals other than terminal #1 of 902_1.

[0835] In this example, since the number of time divisions in which the terminal can transmit the reference signal for sector scanning is 4, in the feedback signal group 2702, Figure 40 As shown, the feedback signal (1) sent by 4011_11 to terminal #1 exists in the frequency band of the first transmission interval. The feedback signal (2) sent to terminal #1 by 4011_12 exists in the frequency band of the third transmission interval.

[0836] For example, at terminal #1 of 902_1, Figure 14 As shown, when the sector scanning reference signal 1401_1 is transmitted, the base station #1 of 901_1 transmits the following signal to the terminal #1 of 902_1: Figure 40 The frequency band present in the first transmission interval is shown The "feedback signal (1) sent to terminal #1 by 4011_11" and the frequency band existing in the third transmission interval "Feedback signal (2) from 4011_12 to terminal #1". In this case, it is assumed that both "Feedback signal (1) from 4011_11 to terminal #1" and "Feedback signal (2) from 4011_12 to terminal #1" are transmitted from transmitting panel antenna 1 of 106_1 of base station #1 at 901_1. (That is, one transmitting panel antenna is selected.)

[0837] As described above, there are "feedback signal (1) sent to terminal #1 from 4011_11" and "feedback signal (2) sent to terminal #1 from 4011_12" because "base station #1 from 901_1 sends two resources (time slots) to terminal #1 from 902_1".

[0838] At this time, it is assumed that "the feedback signal (1) sent to terminal #1 by 4011_11" and "the feedback signal (2) sent to terminal #1 by 4011_12" include, for example, the information that terminal #1 of 902_1 (and base station #1 of 901_1) can use the transmitting panel antenna 1 of 106_1 to communicate.

[0839] In addition, based on the "information of two 'transmitting panel antennas and parameters' with good reception quality and frequency (band) information of base station #1 of 901_1" sent by terminal #1 of 902_1, base station #1 of 901_1 selects a transmitting panel antenna, sets the parameters of beamforming, and sends the following information to terminal #1 of 902_1: Figure 40 The frequency band present in the first transmission interval is shown The "feedback signal (1) sent to terminal #1 by 4011_11" and the frequency band existing in the third transmission interval "Feedback signal (2) sent to terminal #1 from 4011_12".

[0840] also, Figure 40 There may also be feedback signals sent to terminals other than terminal #1 of 902_1. (For example, refer to Figure 16B )

[0841] In addition, in the above example, as shown in 40, an example is shown in which the base station #1 of 901_1 sends "the feedback signal (1) sent to the terminal #1 of 4011_11" and "the feedback signal (2) sent to the terminal #1 of 4011_12" is sent to the terminal #1 of 902_1, but it is also possible that the base station #1 of 901_1 sends more than 3 feedback signals to the terminal #1 of 902_1.

[0842] Figure 41 Shown to exist Figure 27 An example of the structure of the frame group 2703 including data symbols transmitted by the base station #1 of 901_1 in the time interval from t4 to t5. Figure 41 In , the horizontal axis is time and the vertical axis is frequency. Figure 41 In, with Figure 17A Similarly, the frame group 2703 including the data symbol has the first transmission interval, the second transmission interval, the third transmission interval, and the fourth transmission interval, and there is a frequency band frequency band frequency band

[0843] In addition, Figure 41 In the example, the modulation signal (time slot) sent to the terminal #1 of 902_1 is des...

Claims

1. A terminal, comprising: a circuit operable to generate a first signal and a second signal; as well as A transmitter is operable to transmit a first signal from the first panel antenna and a second signal from the second panel antenna.

2. The terminal according to claim 1, wherein The first signal and the second signal are transmitted on the same resources.

3. The terminal according to claim 2, wherein: The same resource is indicated by the base station. The terminal according to claim 1 , wherein: The first signal and the second signal are transmitted on different frequencies. The terminal according to claim 1 , wherein: The first signal is transmitted by orthogonal frequency division multiplexing (OFDM), and the second signal is transmitted by discrete Fourier transform spread spectrum orthogonal frequency division multiplexing (DFT-S-OFDM). The terminal according to claim 1 , wherein: The first signal and the second signal are sent to two transceiver points respectively. The terminal according to claim 1 , wherein: The first signal is transmitted based on a first beam, and the second signal is transmitted based on a second beam different from the first beam. The terminal according to claim 1 , wherein: Each of the first and second planar antennas is composed of one or more antennas.

9. A communication method, comprising: generating a first signal and a second signal; as well as A first signal is transmitted from the first flat panel antenna, and a second signal is transmitted from the second flat panel antenna.

10. The communication method according to claim 9, wherein: The first signal and the second signal are transmitted on the same resources. The communication method according to claim 10 , wherein: The same resource is indicated by the base station.

12. The communication method according to claim 9, wherein: The first signal and the second signal are transmitted on different frequencies.

13. The communication method according to claim 9, wherein: The first signal is transmitted by orthogonal frequency division multiplexing (OFDM), and the second signal is transmitted by discrete Fourier transform spread spectrum orthogonal frequency division multiplexing (DFT-S-OFDM).

14. The communication method according to claim 9, wherein: The first signal and the second signal are sent to two transceiver points respectively.

15. The communication method according to claim 9, wherein: The first signal is transmitted based on a first beam, and the second signal is transmitted based on a second beam different from the first beam.

16. The communication method according to claim 9, wherein: Each of the first and second planar antennas is composed of one or more antennas.

17. An integrated circuit comprising: a generating circuit that controls generation of a first signal and a second signal in operation; as well as The transmitting circuit controls the transmission of a first signal from the first flat antenna and the transmission of a second signal from the second flat antenna during operation.

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