Wireless communication system, wireless communication device and wireless communication method

Abstract

The communication system includes: a first wireless communication device that performs time division transmission of a plurality of first reference signals whose directivity is controlled during a first period; and a second wireless communication device that performs time division transmission of a plurality of second reference signals whose directivity is controlled to the first wireless communication device during a second period, wherein the plurality of second reference signals include information on directivity corresponding to any one of the first reference signals received from the first wireless communication device.

Description

Technical Field

[0001] The present disclosure relates to a wireless communication system, a wireless communication device, and a wireless communication method. Background Art

[0002] For example, as a system using frequencies of 52.6 GHz or higher, there is a communication system using a 60 GHz band.

[0003] As a communication method for extending the communication distance, there is a method described in Patent Document 1. Figure 63 An example of the communication state of the wireless communication device described in Patent Document 1 is shown.

[0004] 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.

[0005] 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.

[0006] Prior art literature

[0007] Patent Literature

[0008] Patent Document 1: Japanese Patent Application No. 2018-518855 Summary of the Invention

[0009] Problems to be solved by the invention

[0010] Non-limiting embodiments of the present disclosure contribute to providing techniques for increasing data transmission speeds in situations where multiple wireless communication devices are present.

[0011] Solutions to the Problem

[0012] A wireless communication system according to one embodiment of the present disclosure includes: a first wireless communication device that performs time-division transmission of a plurality of first reference signals having controlled directivity during a first period; and a second wireless communication device that performs time-division transmission of a plurality of second reference signals having 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 any one of the first reference signals received from the first wireless communication device.

[0013] A wireless communication device according to one embodiment of the present disclosure includes: a reception processing unit that receives, during a first period, a plurality of first reference signals whose directivities are controlled by other wireless communication devices; and a transmission processing unit that time-division transmits, during a second period, a plurality of second reference signals whose directivities are controlled to the other wireless communication devices, wherein the plurality of second reference signals include information about the directivity corresponding to any one of the first reference signals.

[0014] A wireless communication device according to one embodiment of the present disclosure includes: a transmission processing unit that performs time-division transmission of a plurality of first reference signals whose directivity is controlled 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 one of the first reference signals, and the directivity is controlled by another wireless communication device that has received the first reference signal.

[0015] 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 having controlled directivity by time division during a first period, and a second wireless communication device transmits a plurality of second reference signals having controlled directivity by time division to the first wireless communication device during a second period, the plurality of second reference signals including information on the directivity corresponding to any one of the first reference signals received from the first wireless communication device.

[0016] 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.

[0017] Effects of the Invention

[0018] According to non-limiting embodiments of the present disclosure, data transmission speed is improved when multiple wireless communication devices exist.

[0019] 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

[0020] Figure 1A This is a diagram showing a first example of the configuration of a communication device according to the first embodiment.

[0021] Figure 1B This is a diagram showing a second example of the configuration of the communication device according to the first embodiment.

[0022] Figure 1C This is a diagram showing a third example of the configuration of the communication device according to the first embodiment.

[0023] Figure 2 This is a diagram showing a configuration example of the i-th transmitting unit according to the first embodiment.

[0024] Figure 3 This is a diagram showing a configuration example of a transmitting panel antenna i according to the first embodiment.

[0025] Figure 4 This is a diagram showing a configuration example of the receiving panel antenna i according to the first embodiment.

[0026] Figure 5 This is a diagram showing a configuration example of a transmission apparatus when a single-carrier method based on DFT (Discrete Fourier Transform) is used according to the first embodiment.

[0027] Figure 6 This is a diagram showing a configuration example of a receiving apparatus when a single-carrier method based on DFT is used according to the first embodiment.

[0028] Figure 7 This is a diagram showing a configuration example of a transmitting apparatus when a single-carrier method based on the time domain is used according to the first embodiment.

[0029] 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 according to the first embodiment.

[0030] Figure 9 This is a diagram showing an example of the communication state in the first embodiment.

[0031] Figure 10 This is a diagram showing an example of a modulated signal transmitted by a base station in accordance with the first embodiment.

[0032] Figure 11This is a diagram showing an example of a sector scanning reference signal transmitted by a base station according to the first embodiment.

[0033] Figure 12 This is a diagram showing a configuration example of "a reference signal for sector scanning in a transmission panel antenna i" according to the first embodiment.

[0034] Figure 13 This is a diagram showing an example of operation in the terminal response section according to the first embodiment.

[0035] Figure 14 This is a diagram showing a first example of terminal occupation in a transmission interval of a "sector scanning reference signal" for a terminal according to the first embodiment.

[0036] Figure 15 This is a diagram showing a configuration example of "a reference signal for sector scanning in a transmission panel antenna xi" according to the first embodiment.

[0037] Figure 16 This is a diagram showing a configuration example of a feedback signal in the time interval t2 to t3 according to the first embodiment.

[0038] Figure 17 This is a diagram showing a structural example of a frame including data symbols in the time interval t4 to t5 according to the first embodiment.

[0039] Figure 18 This is a diagram showing an example of a situation in which a base station and a terminal perform communications according to the first embodiment.

[0040] Figure 19 This is a diagram showing a situation in which the base station and the terminal communicate with each other in accordance with the first embodiment. Figure 18 Figure 1 shows a subsequent example of this.

[0041] Figure 20 This is a diagram showing a structural example of a "frame including data symbols" transmitted by a terminal according to the first embodiment.

[0042] Figure 21 This is a diagram showing a second example of the occupancy of a terminal in a transmission interval of a "sector scanning reference signal" for a terminal according to the first embodiment.

[0043] Figure 22 This is a diagram showing a third example related to the occupancy of a terminal in a transmission interval of a "sector scanning reference signal" for a terminal according to the first embodiment.

[0044] Figure 23 This is a diagram showing an example of a modulated signal transmitted by a base station in accordance with the second embodiment.

[0045] Figure 24 This is a diagram showing a configuration example of a feedback signal group in the time interval t2 to t3 according to the second embodiment.

[0046] Figure 25 This is a diagram showing a structural example of a frame group including data symbols in the time interval t4 to t5 according to the second embodiment.

[0047] Figure 26 This is a diagram showing an example of a situation in which a base station and a terminal communicate with each other according to the second embodiment.

[0048] Figure 27 This is a diagram showing the communication status between the base station and the terminal according to the second embodiment. Figure 26 Figure 1 shows a subsequent example of this.

[0049] Figure 28 This is a diagram showing a structural example of a "frame group including data symbols" transmitted by a terminal according to the second embodiment.

[0050] Figure 29 This is a diagram showing an example of a communication state in the third embodiment.

[0051] Figure 30 This is a diagram showing an example of a modulated signal transmitted by a base station according to the third embodiment.

[0052] Figure 31A This is a diagram showing a configuration example of a feedback signal group in the time interval t2 to t3 according to the third embodiment.

[0053] Figure 31B This is a diagram showing a configuration example of a feedback signal group in the time interval t2 to t3 according to the third embodiment.

[0054] Figure 31C This is a diagram showing a configuration example of a feedback signal group in the time interval t2 to t3 according to the third embodiment.

[0055] Figure 31D This is a diagram showing a configuration example of a feedback signal group in the time interval t2 to t3 according to the third embodiment.

[0056] Figure 32A This is a diagram showing a structural example of a frame group including data symbols in the time interval t4 to t5 according to the third embodiment.

[0057] Figure 32B This is a diagram showing a structural example of a frame group including data symbols in the time interval t4 to t5 according to the third embodiment.

[0058] Figure 32C This is a diagram showing a structural example of a frame group including data symbols in the time interval t4 to t5 according to the third embodiment.

[0059] Figure 32DThis is a diagram showing a structural example of a frame group including data symbols in the time interval t4 to t5 according to the third embodiment.

[0060] Figure 33 This is a diagram showing an example of terminal occupation during a transmission interval of a "sector scanning reference signal" for a terminal according to the third embodiment.

[0061] Figure 34A This is a diagram showing another example of the configuration of the feedback signal group in the time interval t2 to t3 according to the third embodiment.

[0062] Figure 34B This is a diagram showing another example of the configuration of the feedback signal group in the time interval t2 to t3 according to the third embodiment.

[0063] Figure 34C This is a diagram showing another example of the configuration of the feedback signal group in the time interval t2 to t3 according to the third embodiment.

[0064] Figure 34D This is a diagram showing another example of the configuration of the feedback signal group in the time interval t2 to t3 according to the third embodiment.

[0065] Figure 35A This is a diagram showing another example of the structure of a frame group including data symbols in the time interval t4 to t5 according to the third embodiment.

[0066] Figure 35B This is a diagram showing another example of the structure of a frame group including data symbols in the time interval t4 to t5 according to the third embodiment.

[0067] Figure 35C This is a diagram showing another example of the structure of a frame group including data symbols in the time interval t4 to t5 according to the third embodiment.

[0068] Figure 35D This is a diagram showing another example of the structure of a frame group including data symbols in the time interval t4 to t5 according to the third embodiment.

[0069] Figure 36 This is a diagram showing a structural example of a "frame group including data symbols" transmitted by a terminal according to the third embodiment.

[0070] Figure 37A This is a diagram showing a modification of the structural example of a frame group including data symbols in the time interval t4 to t5 of the third embodiment.

[0071] Figure 37B This is a diagram showing a modification of the structural example of a frame group including data symbols in the time interval t4 to t5 of the third embodiment.

[0072] Figure 37C This is a diagram showing a modification of the structural example of a frame group including data symbols in the time interval t4 to t5 of the third embodiment.

[0073] Figure 37D This is a diagram showing a modification of the structural example of a frame group including data symbols in the time interval t4 to t5 of the third embodiment.

[0074] Figure 38 This is a diagram showing a first example of a configuration example of a "modulated signal (time slot) to the i-th terminal" according to the fourth embodiment.

[0075] Figure 39A This is a diagram showing a first example of a structural example of a "frame or frame group" according to the fourth embodiment.

[0076] Figure 39B This is a diagram showing a second example of the configuration of a "frame or frame group" according to the fourth embodiment.

[0077] Figure 40 This is a diagram showing an example of a communication state in the fifth embodiment.

[0078] Figure 41 This is a diagram showing an example of terminal occupation in a transmission interval of a "sector scanning reference signal" for a terminal according to the fifth embodiment.

[0079] Figure 42A This is a diagram showing a configuration example of a feedback signal group in the time interval t2 to t3 according to the fifth embodiment.

[0080] Figure 42B This is a diagram showing a configuration example of a feedback signal group in the time interval t2 to t3 according to the fifth embodiment.

[0081] Figure 42C This is a diagram showing a configuration example of a feedback signal group in the time interval t2 to t3 according to the fifth embodiment.

[0082] Figure 42D This is a diagram showing a configuration example of a feedback signal group in the time interval t2 to t3 according to the fifth embodiment.

[0083] Figure 43A This is a diagram showing a structural example of a frame group including data symbols in the time interval t4 to t5 according to the fifth embodiment.

[0084] Figure 43B This is a diagram showing a structural example of a frame group including data symbols in the time interval t4 to t5 according to the fifth embodiment.

[0085] Figure 43CThis is a diagram showing a structural example of a frame group including data symbols in the time interval t4 to t5 according to the fifth embodiment.

[0086] Figure 43D This is a diagram showing a structural example of a frame group including data symbols in the time interval t4 to t5 according to the fifth embodiment.

[0087] Figure 44 This is a diagram showing a structural example of a "frame group including data symbols" transmitted by a terminal according to the fifth embodiment.

[0088] Figure 45A This is a diagram showing a modification of the structural example of a frame group including data symbols in the time interval t4 to t5 of the fifth embodiment.

[0089] Figure 45B This is a diagram showing a modification of the structural example of a frame group including data symbols in the time interval t4 to t5 of the fifth embodiment.

[0090] Figure 45C This is a diagram showing a modification of the structural example of a frame group including data symbols in the time interval t4 to t5 of the fifth embodiment.

[0091] Figure 45D This is a diagram showing a modification of the structural example of a frame group including data symbols in the time interval t4 to t5 of the fifth embodiment.

[0092] Figure 46A This is a diagram showing an example of the structure of a communication system according to the sixth embodiment.

[0093] Figure 46B Is a representation of implementation mode 6 Figure 46A A diagram showing an example of the configuration of different communication systems.

[0094] Figure 47 This is a diagram showing an example of the structure of a terminal according to the sixth embodiment.

[0095] Figure 48 This is a diagram showing an example of the structure of a base station according to the sixth embodiment.

[0096] Figure 49A This is a diagram showing an example of the structure of a base station according to the sixth embodiment.

[0097] Figure 49B This is a diagram showing an example of the structure of a base station according to the sixth embodiment.

[0098] Figure 50A This is a diagram showing an example of the transmission status from time t0 to time t5 in the sixth embodiment.

[0099] Figure 50BThis is a diagram showing an example of the transmission status from time t0 to time t5 in the sixth embodiment.

[0100] Figure 50C This is a diagram showing an example of the transmission status from time t0 to time t5 in the sixth embodiment.

[0101] Figure 51 This is a diagram showing an example of a PUCCH of a terminal according to the sixth embodiment.

[0102] Figure 52 This is a diagram showing an example of the structure of a frame according to the sixth embodiment.

[0103] Figure 53 This is a diagram showing an example of the structure of a frame according to the sixth embodiment.

[0104] Figure 54 This is a diagram showing an example of a case where a terminal according to the sixth embodiment transmits a sector scanning signal.

[0105] Figure 55 This is a diagram for explaining an example of a modulation signal of the first frequency transmitted by a terminal according to the sixth embodiment.

[0106] Figure 56A This is a diagram showing a modified example of the communication system of embodiment 6.

[0107] Figure 56B This is a diagram showing a modified example of the communication system of embodiment 6.

[0108] Figure 56C This is a diagram showing a modified example of the communication system of embodiment 6.

[0109] Figure 56D This is a diagram showing a modified example of the communication system of embodiment 6.

[0110] Figure 57 This is a diagram showing an example of the sending status of Implementation Example 6.

[0111] Figure 58 This is a diagram showing an example of the sending status of Implementation Example 6.

[0112] Figure 59 This is a diagram showing an example of the reception status from time s1 to time s6 in the sixth embodiment.

[0113] Figure 60 This is a diagram showing an example of data included in a modulated signal transmitted using the second frequency (frequency band) according to the sixth embodiment.

[0114] Figure 61 This is a diagram showing an example of data included in a modulated signal transmitted using the second frequency (frequency band) according to the sixth embodiment.

[0115] Figure 62A This is a diagram showing an example of the reception status from time s1 to time s6 in the sixth embodiment.

[0116] Figure 62B This is a diagram showing an example of the reception status from time s1 to time s6 in the sixth embodiment.

[0117] Figure 63 This is a diagram showing an example of a sector scanning reference signal transmitted by a base station in accordance with the seventh embodiment.

[0118] Figure 64 This is a diagram showing a configuration example of a sector scanning reference signal according to a seventh embodiment.

[0119] Figure 65 This is a diagram showing a configuration example of a sector scanning reference signal according to a seventh embodiment.

[0120] Figure 66 FIG. 1 is a diagram showing an example of a communication state of a conventional wireless communication device. DETAILED DESCRIPTION

[0121] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0122] (Implementation Method 1)

[0123] The communication system, communication device, and communication method according to this embodiment will be described in detail.

[0124] Figure 1A An example of the configuration of communication devices such as a base station, an access point, a terminal, and a repeater in this embodiment is shown.

[0125] 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.

[0126] in addition, 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.

[0127] 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.

[0128] Figure 1AThe 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.

[0129] 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.

[0130] 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.

[0131] 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.

[0132] 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.

[0133] Second processing unit 153 receives the i-th received signal 152_i and control signal 100 as input, performs frequency conversion and other processing, and outputs j-th signal-processed signal 154_j. Furthermore, i-th received signal 152_i may contain a non-signal received signal, and j-th signal-processed signal 154_j may contain a non-signal signal processed signal.

[0134] 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 based on the control signal 100, and outputs the jth control data 156_j and the jth data 157_j.

[0135] 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.

[0136] 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 signal 154_1 after first signal processing becomes the first received signal 152_1, the signal 154_2 after second signal processing becomes the second received signal 152_2, and the signal 154_3 after third signal processing becomes the third received signal 152_3. Alternatively, the second processing unit may perform processing such that the signal 154_2 after second signal processing becomes the first received signal 152_1.

[0137] 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 The communication device can also perform transmission and / or reception corresponding to MIMO (Multiple Input Multiple Output) transmission using multiple antennas to send multiple modulated signals (multiple streams).

[0138] Figure 1B In this embodiment, the communication devices such as base stations, access points, terminals, and repeaters are 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.

[0139] Figure 1BThe 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.

[0140] 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 x-th signal processed as the y-th 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.

[0141] Figure 1C In this embodiment, the communication devices such as base stations, access points, terminals, and repeaters are 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.

[0142] 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.

[0143] 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".

[0144] Data symbol generator 202 receives data 201 and control signal 200 as input, and performs error correction coding, mapping, signal processing for transmission, and other operations based on information such as the error correction coding method, modulation scheme, transmission method, and frame structure method contained in control signal 200. It then outputs modulated signal 203 representing the data symbol. Data 201 corresponds to i-th data 101_i, and control signal 200 corresponds to control signal 100.

[0145] The sector scan reference signal generation unit 204 receives the control signal 200 as input, generates and outputs a sector scan reference signal 205 based on the frame structure information included in the control signal 200 .

[0146] Another signal generating unit 206 receives the control signal 200 as input, generates and outputs another signal 207 based on the control signal.

[0147] 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, and generates and outputs a modulated signal 252 that conforms to the frame structure based on the frame structure information included in the control signal 200. The modulated signal 252 that conforms to the frame structure corresponds to the i-th modulated signal 103_i.

[0148] 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".

[0149] 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.

[0150] 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.

[0151] 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.

[0152] 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.

[0153] 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.

[0154] 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.

[0155] 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.

[0156] 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.

[0157] 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.

[0158] 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.

[0159] 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.

[0160] 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.

[0161] Figure 4 Shown Figure 1A 、 Figure 1B 、 Figure 1C The structure of the receiving panel antenna i of 151_i in FIG. In addition, i is set to "an integer greater than 1 and less than m".

[0162] 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.

[0163] 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.

[0164] 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.

[0165] 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.

[0166] 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.

[0167] 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.

[0168] 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.

[0169] 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.

[0170] 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.

[0171] 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.

[0172] 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.

[0173] 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.

[0174] 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.

[0175] 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.

[0176] In this embodiment, it is assumed that Figure 1A 、 Figure 1B 、 Figure 1C The communication device corresponds to the sending and receiving of the single carrier transmission method.

[0177] Figure 5 FIG2 shows a configuration example of a transmitting device when a single-carrier method based on DFT (Discrete Fourier Transform) is used. Figure 5 As shown, the transmitter comprises a constellation mapper 501, a tone mapper 502, an IFFT (Inverse Fast Fourier Transform) 503, a CP (Cyclic Prefix) insertion unit 504, and a Tx (Transmitter) FE (Front End) processing unit 505. Furthermore, other processing units may also be present in the transmitter.

[0178] Figure 6 FIG. 2 shows an example of a structure of a receiving device when a single-carrier method based on DFT is used. Figure 6As shown, the receiving device includes a receiving FE processing unit (Rx (Receiver) FE processing) 601, a CP removal unit (CP Removal) 602, an FFT (Fast Fourier Transform) 603, a tone demapping unit (Tone demapping) 604, an FDE (Frequency Domain Equalization) 605, a DFT 606, and a demapper (Demapper) 607. Furthermore, other processing units may also be present in the receiving device.

[0179] Figure 7 FIG. 2 shows a configuration example of a transmitting device when a single carrier method based on the time domain is used. Figure 7 As shown, the transmitter comprises a constellation mapper 701, a CP insertion unit 702, an up-sampling and pulse shaping unit 703, and a Tx (Transmitter) FE (Front End) processing unit 704. Furthermore, other processing units may also be present in the transmitter.

[0180] 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 8 As 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.

[0181] In the above description, examples of the configurations of the transmission method, reception method, transmission apparatus, and reception apparatus of the single carrier method have been described, but examples of the transmission method, reception method, transmission apparatus, and reception apparatus of the single carrier method are not limited thereto. For example, examples of single-carrier methods include "DFT (Discrete Fourier Transform)-Spread OFDM (Orthogonal Frequency Division Multiplexing)" (DFT-SOFDM), "Trajectory Constrained DFT-Spread OFDM", "Constrained DFT-Spread OFDM" (Constrained DFT-S OFDM), "OFDM based SC (Single Carrier)", "SC (Single Carrier)-FDMA (Frequency Division Multiple Access)", "Gurd interval DFT-Spread OFDM", time-domain implementation single-carrier method (for example, SC (Single Carrier)-QAM), etc.

[0182] Figure 9 An example of the communication state in this embodiment is shown. Figure 9 As shown, consider the case where base station #1 at 901_1 communicates with terminal #1 at 902_1, terminal #2 at 902_2, and terminal #3 at 902_3. 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.

[0183] In addition, the following description takes the case where the base station and the terminal perform TDD (Time Division Duplex), TDMA (Time Division Multiple Access), and TDM (Time Division Multiplexing) as an example.

[0184] Figure 10 Shown Figure 9 An example of a modulated signal 1000 transmitted by base station #1 of 901_1. Figure 10In FIG, the horizontal axis represents time. In the time interval from time t0 to time t1, there is a sector sweep reference signal 1001. The sector sweep reference signal 1001 will be described later.

[0185] The time interval from time t1 to time t2 is the terminal response interval. In addition, the terminal response will be described later.

[0186] 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.

[0187] 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.

[0188] exist Figure 10 In 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.

[0189] Figure 11 Shown Figure 9 The 901_1 base station #1 sends Figure 10 An example of a sector scan reference signal 1001. Figure 11 , the horizontal axis is time.

[0190] For example, with Figure 1A 、 Figure 1B 、 Figure 1C The base station #1 of the structure 901_1 transmits a reference signal 1101_1 for sector scanning in the transmitting panel antenna 1 from the transmitting panel antenna 1 106_1.

[0191] Therefore, if Figure 11 As shown, with Figure 1A 、 Figure 1B 、 Figure 1C Base station #1 of the configuration 901_1 transmits a sector scanning reference signal 1101_i from a transmission panel antenna i of 106_i. Note that i is an integer greater than or equal to 1 and less than or equal to M.

[0192] Figure 12 Shown Figure 11 The structure example of "sector scanning reference signal 1101_i in transmitting panel antenna i". Figure 12 , the horizontal axis is time.

[0193] For example, suppose that 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.

[0194] "Reference signal 1201_1 using first parameters in transmitting panel antenna i" will be described.

[0195] Send at base station #1 of 901_1 Figure 12 When transmitting the reference signal 1201_1 using the first parameter from the transmission panel antenna i, base station #1 at 901_1 sets the multiplication coefficient of the multiplication unit 304_1 at the transmission panel antenna i at 106_i to w1(i, 1). If the first transmission signal 303_1 in the reference signal 1201_1 using the first parameter from the transmission panel antenna i is set to tx1ref1(t), the multiplication unit 304_1 obtains tx1ref1(t)×w1(i, 1). Next, base station #1 at 901_1 sets the multiplication coefficient of the multiplication unit 304_1 at the transmission panel antenna i to w1(i, 1). Figure 3 Antenna 306_1 transmits tx1ref1(t)×w1(i, 1). In addition, t is time.

[0196] Send at base station #1 of 901_1 Figure 12 When transmitting the reference signal 1201_1 using the first parameter from the transmission panel antenna i, base station #1 at 901_1 sets the multiplication coefficient of the multiplication unit 304_2 at the transmission panel antenna i at 106_i to w2(i, 1). If the second transmission signal 303_2 in the reference signal 1201_1 using the first parameter from the transmission panel antenna i is set to tx2ref1(t), the multiplication unit 304_2 obtains tx2ref1(t)×w2(i, 1). Next, base station #1 at 901_1 sets the multiplication coefficient of the multiplication unit 304_2 at the transmission panel antenna i at 106_i to w2(i, 1). Figure 3 Antenna 306_2 transmits tx2ref1(t)×w2(i,1).

[0197] Send at base station #1 of 901_1 Figure 12When transmitting the reference signal 1201_1 using the first parameter from the transmission panel antenna i, base station #1 at 901_1 sets the multiplication coefficient of the multiplication unit 304_3 at the transmission panel antenna i at 106_i to w3(i, 1). If the third transmission signal 303_3 in the reference signal 1201_1 using the first parameter from the transmission panel antenna i is set to tx3ref1(t), the multiplication unit 304_3 obtains tx3ref1(t)×w3(i, 1). Next, base station #1 at 901_1 sets the multiplication coefficient of the multiplication unit 304_3 at the transmission panel antenna i at 106_i to w3(i, 1). Figure 3 Antenna 306_3 transmits tx3ref1(t)×w3(i,1).

[0198] Send at base station #1 of 901_1 Figure 12 When transmitting the reference signal 1201_1 using the first parameter from the transmission panel antenna i, base station #1 at 901_1 sets the multiplication coefficient of the multiplication unit 304_4 at the transmission panel antenna i at 106_i to w4(i, 1). If the fourth transmission signal 303_4 in the reference signal 1201_1 using the first parameter from the transmission panel antenna i is set to tx4ref1(t), the multiplication unit 304_4 obtains tx4ref1(t)×w4(i, 1). Next, base station #1 at 901_1 sets the multiplication coefficient of the multiplication unit 304_4 at the transmission panel antenna i at 106_i to w4(i, 1). Figure 3 Antenna 306_4 transmits tx4ref1(t)×w4(i,1).

[0199] "Reference signal 1201_j using j-th parameter in transmitting panel antenna i" will be described.

[0200] Send at base station #1 of 901_1 Figure 12 When "reference signal 1201_j using the jth parameter from transmitting panel antenna i" is shown, base station #1 at 901_1 sets the multiplication coefficient of multiplication section 304_1 at transmitting panel antenna i at 106_i to w1(i, j). If the first transmitted signal 303_1 in "reference signal 1201_j using the jth parameter from transmitting panel antenna i" is set to tx1refj(t), multiplication section 304_1 obtains tx1refj(t)×w1(i, j). Next, base station #1 at 901_1 obtains Figure 3 Antenna 306_1 transmits tx1refj(t)×w1(i, j). In addition, t is time.

[0201] Send at base station #1 of 901_1 Figure 12When "reference signal 1201_j using the jth parameter from transmitting panel antenna i" is shown, base station #1 at 901_1 sets the multiplication coefficient of multiplication section 304_2 at transmitting panel antenna i at 106_i to w2(i, j). If the second transmission signal 303_2 in "reference signal 1201_j using the jth parameter from transmitting panel antenna i" is set to tx2refj(t), multiplication section 304_2 obtains tx2refj(t)×w2(i, j). Next, base station #1 at 901_1 obtains Figure 3 Antenna 306_2 transmits tx2refj(t)×w2(i, j).

[0202] Send at base station #1 of 901_1 Figure 12 When "transmitting reference signal 1201_j using the jth parameter from panel antenna i," base station #1 at 901_1 sets the multiplication coefficient of multiplication unit 304_3 at transmitting panel antenna i at 106_i to w3(i, j). If the third transmitted signal 303_3 in "transmitting reference signal 1201_j using the jth parameter from panel antenna i" is set to tx3refj(t), multiplication unit 304_3 obtains tx3refj(t)×w3(i, j). Next, base station #1 at 901_1 obtains Figure 3 Antenna 306_3 transmits tx3refj(t)×w3(i, j).

[0203] Send at base station #1 of 901_1 Figure 12 When "reference signal 1201_j using the jth parameter from transmitting panel antenna i" is shown, base station #1 at 901_1 sets the multiplication coefficient of multiplication unit 304_4 at transmitting panel antenna i at 106_i to w4(i, j). If the fourth transmission signal 303_4 in "reference signal 1201_j using the jth parameter from transmitting panel antenna i" is set to tx4refj(t), multiplication unit 304_4 obtains tx4refj(t)×w4(i, j). Next, base station #1 at 901_1 obtains Figure 3 Antenna 306_4 transmits tx4refj(t)×w4(i, j).

[0204] In addition, Figure 12 In the case of , 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.

[0205] Assume that Figure 11 、 Figure 12As shown, when base station #1 of 901_1 transmits "reference signal 1101_i for sector scanning in transmission panel antenna i", "reference signal 1201_j using j-th parameter in transmission panel antenna i" includes the following information, for example.

[0206] The ID (identification number) of the transmitting panel antenna (here, for example, equivalent to i)

[0207] Identification number (ID) of the parameter used for beamforming (directivity control) (here, for example, equivalent to j)

[0208] When a terminal transmits a reference signal for sector scanning, the number of time slots in which the reference signal for sector scanning can be transmitted (the number of terminals that can transmit the reference signal for sector scanning) (This will be described later.)

[0209] By sending the "ID (identification) of the transmitting panel antenna" and the "identification (ID) of the parameters used for beamforming (directivity control)" through the base station #1 of 901_1, the terminal 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 base station #1 of 901_1 and the terminal can perform appropriate control, thereby achieving the effect of improving the data reception quality.

[0210] Furthermore, the number of time slots in which a terminal can transmit a sector scanning reference signal (the number of terminals that can transmit a sector scanning reference signal) can be changed based on the frame and / or time. This can improve the data transmission efficiency of the communication system.

[0211] Next, explain Figure 10 The terminal response interval in is the action from time t1 to time t2.

[0212] Figure 13 The example of the operation of the terminal response interval, that is, the time interval from time t1 to time t2, is shown. Figure 13 , the horizontal axis is time.

[0213] Assume that 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, it is assumed that in the time interval from time t1 to time t2, i.e., the terminal response interval, Figure 13In this way, there is a "sector scanning reference signal" transmission interval 1301_1 for the first terminal, a "sector scanning reference signal" transmission interval 1301_2 for the second terminal, a "sector scanning reference signal" transmission interval 1301_3 for the third terminal, and a "sector scanning reference signal" transmission interval 1301_4 for the fourth terminal.

[0214] Therefore, in Figure 13 In the case of , base station #1 of 901_1 sets "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)" to 4.

[0215] Figure 14 Shown with Figure 13 The example of terminal occupancy is shown as follows: "Terminal 1 transmits 'sector scan reference signal' interval 1301_1, terminal 2 transmits 'sector scan reference signal' interval 1301_2, terminal 3 transmits 'sector scan reference signal' interval 1301_3, and terminal 4 transmits 'sector scan reference signal' interval 1301_4". Figure 14 , the horizontal axis is time.

[0216] Figure 9 Terminal #1 at 902_1 receives sector scanning reference signal 1001 transmitted by base station #1 at 901_1 and estimates the "transmitting panel antenna and parameter number" of the transmitting panel antenna of base station #1 at 901_1 with good reception quality. This estimation can be performed by obtaining sector scanning reference signal 1001 and the "transmitting panel antenna ID" and "beamforming (directivity control) parameter ID" contained in sector scanning reference signal 1001.

[0217] It is assumed that terminal #1 of 902_1 estimates, for example, "transmitting panel antenna a1 and parameters b1" as the "transmitting panel antenna and parameters" with good reception quality.

[0218] In addition, while estimating the "transmitting panel antenna and parameters" with good reception quality, terminal #1 of 902_1 obtains information on "the number of time slots in which the reference signal for sector scanning can be transmitted when the terminal transmits the reference signal for sector scanning (the number of terminals that can transmit the reference signal for sector scanning)". Figure 14 In this case, terminal #1 of 902_1 obtains the information that "when the terminal sends a reference signal for sector scanning, the number of time slots in which the reference signal for sector scanning can be sent (the number of terminals that can send a reference signal for sector scanning)" is 4.

[0219] 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 "1st (= "0" + 1) terminal uses the "sector scanning reference signal" sending interval 1301_1 to send the sector scanning reference signal 1401_1. In addition, a random number is used here to set the sending interval of the sector scanning reference signal, but a random number such as an integer or a natural number, an irregular integer or a natural number, a regular integer or a natural number, an integer or a natural number inherently reserved by the terminal, etc. can also be used instead of a random number to set the sending interval of the sector scanning reference signal. Therefore, the setting of the sending interval of the sector scanning reference signal is not limited to the above example, for example, the sending interval of the sector scanning reference signal is set according to the terminal. This point can also be applied to the following similar description.

[0220] Furthermore, it is assumed that sector scanning reference signal 1401_1 includes information on the "transmitting panel antenna and parameters" with good reception quality obtained by terminal #1 at 902_1, namely, information on "transmitting panel antenna a1 and parameters b1." This will be described later.

[0221] Likewise, Figure 9 Terminal #2 at 902_2 receives sector scanning reference signal 1001 transmitted by base station #1 at 901_1 and estimates the "transmitting panel antenna and parameter number" of the transmitting panel antenna of base station #1 at 901_1 with good reception quality. This estimation is performed by obtaining sector scanning reference signal 1001 and the "transmitting panel antenna ID" and "beamforming (directivity control) parameter ID" contained in sector scanning reference signal 1001.

[0222] Assume that terminal #2 of 902_2 estimates, for example, "transmitting panel antenna a2 and parameters b2" as the "transmitting panel antenna and parameters" with good reception quality.

[0223] In addition, while estimating the "transmitting panel antenna and parameters" with good reception quality, terminal #2 of 902_2 obtains information on "the number of time slots in which the reference signal for sector scanning can be transmitted when the terminal transmits the reference signal for sector scanning (the number of terminals that can transmit the reference signal for sector scanning)". Figure 14 In this case, terminal #2 of 902_2 obtains the information that "when the terminal sends a reference signal for sector scanning, the number of time slots in which the reference signal for sector scanning can be sent (the number of terminals that can send a reference signal for sector scanning)" is 4.

[0224] 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 uses Figure 14 The "3rd (="2"+1)" terminal transmits the sector scanning reference signal 1401_2 in the "sector scanning reference signal" transmission interval 1301_3.

[0225] Furthermore, it is assumed that sector scanning reference signal 1401_2 includes information on the "transmitting panel antenna and parameters" with good reception quality obtained by terminal #2 at 902_2, namely, information on "transmitting panel antenna a2 and parameters b2." This will be described later.

[0226] Therefore, terminal #i at 902_i receives sector scanning reference signal 1001 transmitted by base station #1 at 901_1 and estimates the "transmit panel antenna and parameter number" of the transmit panel antennas of base station #1 at 901_1 with good reception quality. This estimation can be performed by obtaining sector scanning reference signal 1001, the "transmit panel antenna ID" and the "beamforming (directivity control) parameter ID" contained in sector scanning reference signal 1001. For example, let i be an integer greater than 1.

[0227] It is assumed that terminal #i of 902_i estimates, for example, "transmitting panel antenna ai and parameters bi" as the "transmitting panel antenna and parameters" with good reception quality.

[0228] In addition, while estimating the "transmitting panel antenna and parameters" with good reception quality, terminal #i of 902_i obtains information on "the number of time slots in which the reference signal for sector scanning can be transmitted when the terminal transmits the reference signal for sector scanning (the number of terminals that can transmit the reference signal for sector scanning)". Figure 14 In this case, terminal #i of 902_i obtains the information that "when the terminal sends a reference signal for sector scanning, the number of time slots in which the reference signal for sector scanning can be sent (the number of terminals that can send a reference signal for sector scanning)" is 4.

[0229] 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 uses a random number to obtain "j". In addition, j is a value such as "0", "1", "2", or "3". In this case, the terminal #i of 902_i uses Figure 14The ("j"+1)th terminal transmits a sector scanning reference signal 1401_i in the "sector scanning reference signal" transmission interval 1301_("j"+1).

[0230] Furthermore, it is assumed that sector scanning reference signal 1401_i includes information on "transmitting panel antennas and parameters" with good reception quality obtained by terminal #i at 902_i, namely, information on "transmitting panel antenna ai and parameters bi." This will be described later.

[0231] 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.

[0232] For used Figure 14 The structure of the sector scanning reference signal 1401_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, assuming that 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 terminal #i of the structure 902_i having the transmitting panel antenna xi of 106_xi is not limited to Figure 3 .

[0233] Figure 11 An example of a sector scanning reference signal 1401_i transmitted by terminal #i of 902_i is shown. Figure 11 , the horizontal axis is time.

[0234] For example, with Figure 1A 、 Figure 1B 、 Figure 1C Terminal #i of the structure 902_i transmits reference signal 1101_1 for sector scanning in transmitting panel antenna 1 from transmitting panel antenna 1 106_1.

[0235] Therefore, if Figure 11 As shown, with Figure 1A 、 Figure 1B 、 Figure 1C Terminal #i of 902_i of the configuration transmits sector scanning reference signal 1101_xi from transmission panel antenna xi of 106_xi. In addition, xi is an integer greater than or equal to 1 and less than or equal to M.

[0236] Figure 15 Shown Figure 11 The structure example of "sector scanning reference signal 1101_xi in the transmission panel antenna xi". Figure 15 , the horizontal axis is time.

[0237] For example, with 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.

[0238] The “reference signal 1501_1 using the first parameter in the transmission panel antenna xi” will be described.

[0239] Send at terminal #i of 902_i Figure 15 When transmitting the reference signal 1501_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 1501_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), where t is time.

[0240] Send at terminal #i of 902_i Figure 15 When transmitting the reference signal 1501_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 1501_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).

[0241] Send at terminal #i of 902_i Figure 15 When transmitting the reference signal 1501_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 1501_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).

[0242] Send at terminal #i of 902_i Figure 15 When transmitting the reference signal 1501_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 1501_1 using the first parameter from the transmission panel antenna xi is tx4ref1(t), the multiplication unit 304_4 obtains tx4ref1(t)×w4(xi,1). Next, 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).

[0243] The “reference signal 1501_j using the j-th parameter in the transmission panel antenna xi” will be described.

[0244] Send at terminal #i of 902_i Figure 15 When transmitting the reference signal 1501_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 1501_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), where t is time.

[0245] Send at terminal #i of 902_i Figure 15When transmitting the reference signal 1501_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 1501_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). Next, 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).

[0246] Send at terminal #i of 902_i Figure 15 When transmitting the reference signal 1501_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 1501_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).

[0247] Send at terminal #i of 902_i Figure 15 When transmitting the reference signal 1501_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 1501_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).

[0248] In addition, Figure 15 In the case of , j is an integer greater than or equal to 1 and less than or equal to 4. Figure 15 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.

[0249] like Figure 11 、 Figure 15As shown, when terminal #i of 902_i transmits "reference signal 1101_xi for sector scanning in transmission panel antenna xi", it is assumed that "reference signal 1501_j using j-th parameter in transmission panel antenna xi" includes the following information, for example.

[0250] Information on the "transmitting panel antenna and parameters" of base station #1 of 901_1 with good reception quality as described above.

[0251] Therefore, terminal #i of 902_i is Figure 11 In the "reference signal 1101_1 for sector scanning in the transmitting panel antenna 1", "reference signal 1101_2 for sector scanning in the transmitting panel antenna 2", ..., "reference signal 1101_M for sector scanning in the transmitting panel antenna M", the "information on the 'transmitting panel antenna and parameters' of the base station #1 with good reception quality 901_1" is sent.

[0252] In addition, in the Figure 11 'Sector scanning reference signal 1101_1 for transmitting panel antenna 1', 'Sector scanning reference signal 1101_2 for transmitting panel antenna 2', ..., 'Sector scanning reference signal 1101_M for transmitting panel antenna M'" Figure 15 In the "reference signal 1501_1 using the first parameter in the sending panel antenna xi", "reference signal 1501_2 using the second parameter in the sending panel antenna xi", "reference signal 1501_3 using the third parameter in the sending panel antenna xi", and "reference signal 1501_4 using the fourth parameter in the sending panel antenna xi", terminal #i of 902_i sends "the information of 'transmitting panel antenna and parameters' of base station #1 of 901_1 with good reception quality".

[0253] In this case, even if the base station #1 of 901_1 uses an omni-directional antenna, it can receive the " Figure 11The possibility of receiving any one of the sector scanning reference signals 'sending panel antenna 1 for sector scanning reference signal 1101_1', 'sending panel antenna 2 for sector scanning reference signal 1101_2', ..., 'sending panel antenna M for sector scanning reference signal 1101_M'' will also increase. The reason is that: terminal #i of 902_i performs transmission beamforming (directivity control). As a result, base station #1 of 901_1 can obtain the following effect, that is, the possibility of being able to receive the "information of 'transmitting panel antenna and parameters' of base station #1 of 901_1 with good reception quality" sent by terminal #i of 902_i increases. Therefore, the following effect can be obtained, that is, base station #1 of 901_1 can send a modulated signal to terminal #i of 902_i based on the "information of 'transmitting panel antenna and parameters' of base station #1 of 901_1 with good reception quality", and terminal #i of 902_i can receive the modulated signal with high reception quality.

[0254] 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.

[0255] In addition, if Figure 11 、 Figure 15 As shown, when terminal #i at 902_i transmits "sector scanning reference signal 1101_xi at transmission panel antenna xi", "reference signal 1501_j using j-th parameter at transmission panel antenna xi" may include the following information, for example.

[0256] The ID (identification number) of the transmitting panel antenna (here, for example, equivalent to i)

[0257] Identification number (ID) of the parameter used for beamforming (directivity control) (here, for example, equivalent to j)

[0258] 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.

[0259] Figure 16 Shows the 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 16 In this example, the horizontal axis is time. In this example, because "when the terminal sends the reference signal for sector scanning, the number of time slots in which the reference signal for sector scanning can be sent (the number of terminals that can send the reference signal for sector scanning)" is 4, Figure 16 As shown, feedback signal 1002 includes four feedback signals addressed to the terminals: feedback signal 1601_1 addressed to the first terminal, feedback signal 1601_2 addressed to the second terminal, feedback signal 1601_3 addressed to the third terminal, and feedback signal 1601_4 addressed to the fourth terminal. Furthermore, for example, if "the number of time slots in which a terminal can transmit a sector scanning reference signal (the number of terminals that can transmit a sector scanning reference signal) when transmitting a sector scanning reference signal" is Ω, feedback signal 1002 may include Ω feedback signals addressed to the terminals. Ω is an integer greater than or equal to 1 or an integer greater than or equal to 2.

[0260] For example, in Figure 14 In this way, when the sector scanning reference signal 1401_1 is sent by terminal #1 of 902_1 and the sector scanning reference signal 1401_2 is sent by terminal #2 of 902_2, the base station #1 of 901_1 uses the feedback signal 1601_1 sent to the first terminal to send a feedback signal to terminal #1 of 902_1, and uses the feedback signal 1601_3 sent to the third terminal to send a feedback signal to terminal #2 of 902_2.

[0261] At this time, it is assumed that the feedback signal 1601_1 sent to the first terminal includes, for example, the ability to communicate with the terminal #1 of 902_1 (or, Figure 10 Frame 1003 containing data symbols includes information about symbols sent to terminal #1 of 902_1).

[0262] Furthermore, it is assumed that the feedback signal 1601_3 sent to the third terminal includes, for example, a signal that the terminal #2 of 902_2 can communicate (or, Figure 10 Frame 1003 containing data symbols includes information about symbols sent to terminal #2 of 902_2).

[0263] In addition, based on the "information on the 'transmitting panel antenna and parameters' of base station #1 of 901_1 with good reception quality" sent by terminal #1 of 902_1, base station #1 of 901_1 selects a transmitting panel antenna, sets beamforming parameters, and sends a feedback signal 1601_1 to the first terminal.

[0264] Similarly, based on the "information on the 'transmitting panel antenna and parameters' of base station #1 of 901_1 with good reception quality" sent by terminal #2 of 902_2, base station #1 of 901_1 selects a transmitting panel antenna, sets beamforming parameters, and sends a feedback signal 1601_3 to the third terminal.

[0265] Figure 17 Shows the Figure 10 An example of the structure of the frame 1003 containing the data symbol transmitted by the base station #1 of 901_1 in the time interval from t4 to t5. Figure 17 In this example, the horizontal axis is time. In this example, because "when the terminal sends the reference signal for sector scanning, the number of time slots in which the reference signal for sector scanning can be sent (the number of terminals that can send the reference signal for sector scanning)" is 4, Figure 17 As shown, in frame 1003 containing data symbols, there are four modulation signals (time slots) addressed to the terminals: a modulation signal addressed to the first terminal (time slot addressed to the first terminal) 1701_1, a modulation signal addressed to the second terminal (time slot addressed to the second terminal) 1701_2, a modulation signal addressed to the third terminal (time slot addressed to the third terminal) 1701_3, and a modulation signal addressed to the fourth terminal (time slot addressed to the fourth terminal) 1701_4. Furthermore, for example, if "when a terminal transmits a reference signal for sector scanning, the number of time slots in which the reference signal for sector scanning can be transmitted (the number of terminals that can transmit the reference signal for sector scanning)" is Ω, a configuration may also be employed in which, in frame 1003 containing data symbols, there are Ω modulation signals (time slots) addressed to the terminals. Here, Ω is an integer greater than or equal to 1 or an integer greater than or equal to 2.

[0266] For example, in Figure 14In that case, when the reference signal 1401_1 for sector scanning is sent by terminal #1 of 902_1, and when the reference signal 1401_2 for sector scanning is sent by terminal #2 of 902_2, the base station #1 of 901_1 uses the modulation signal (time slot sent to the first terminal) 1701_1 sent to the first terminal to send the modulation signal (time slot) to terminal #1 of 902_1, and uses the modulation signal (time slot sent to the first terminal) 1701_3 sent to the third terminal to send the modulation signal (time slot) to terminal #2 of 902_2.

[0267] At this time, it is assumed that the modulated signal (time slot addressed to the first terminal) 1701_1 addressed to the first terminal includes, for example, a data symbol (data, information) addressed to the terminal #1 at 902_1.

[0268] Furthermore, it is assumed that the modulated signal (time slot addressed to the third terminal) 1701_3 addressed to the third terminal includes, for example, data symbols (data, information) addressed to terminal #2 of 902_2.

[0269] In addition, based on the "information on the 'transmitting panel antenna and parameters' of base station #1 of 901_1 with good reception quality" sent by terminal #1 of 902_1, base station #1 of 901_1 selects the transmitting panel antenna, sets the parameters of beamforming, and sends the modulated signal (time slot sent to the first terminal) 1701_1 to the first terminal.

[0270] Similarly, based on the "information on the 'transmitting panel antenna and parameters' of base station #1 of 901_1 with good reception quality" sent by terminal #2 of 902_2, base station #1 of 901_1 selects the transmitting panel antenna, sets the parameters of beamforming, and sends the modulated signal (time slot sent to the third terminal) 1701_3 to the third terminal.

[0271] In addition, it can also be, Figure 16 In the example, feedback signal 1601_1 sent to the first terminal includes information that "base station #1 at 901_1 receives sector scanning reference signal 1401_1 transmitted by terminal #1 at 902_1 and estimates the transmission panel antenna and parameters of terminal #1 at 902_1 with good reception quality."

[0272] Therefore, terminal #1 of 902_1 selects a transmitting panel antenna, sets a beamforming method, and sends code elements, frames and / or modulated signals to base station #1 of 901_1 based on the information of "transmitting panel antenna and parameters" of terminal #1 of 902_1 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.

[0273] Moreover, in Figure 16In the example, feedback signal 1601_3 sent to the third terminal may include information that "base station #1 of 901_1 receives sector scanning reference signal 1401_2 transmitted by terminal #2 of 902_2 and estimates the 'transmitting panel antenna and parameters' of terminal #2 of 902_2 with good reception quality."

[0274] Therefore, terminal #2 of 902_2 selects a transmitting panel antenna, sets a beamforming method, and sends code elements, frames and / or modulated signals to base station #1 of 901_1 based on the information of "transmitting panel antenna and parameters" of terminal #2 of 902_2 with good reception quality obtained from base station #2 of 901_1, thereby achieving the effect of improving the reception quality of data in base station #1 of 901_1.

[0275] In addition, in the time interval from t3 to t4, the terminals, namely terminal #1 of 902_1 and terminal #2 of 902_2 in the above description, can also send a modulated signal containing information such as ACK (acknowledgement) indicating that the signal of base station #1 of 901_1 has been received to base station #1 of 901_1.

[0276] In addition, Figure 17 The modulated signal (time slot sent to the first terminal) 1701_1 sent to the first terminal may include, in addition to data symbols, "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. Furthermore, symbols containing control information may include information about the terminal serving as the destination (an ID capable of identifying the terminal), a method for sending a modulated signal, information about the modulation method, information about the error correction coding method (code length, coding rate, etc.), and information about the MCS (Modulation and Coding Scheme).

[0277] Similarly, the modulated signal (time slot for the second terminal) 1701_2 for the second terminal, the modulated signal (time slot for the third terminal) 1701_3 for the third terminal, and the modulated signal (time slot for the fourth terminal) 1701_4 for the fourth terminal may include, in addition to data symbols, 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 about the destination terminal (an ID that can identify the terminal), the modulation signal transmission method, information about the modulation scheme, information about the error correction coding scheme (code length, coding rate, etc.), and information about the MCS.

[0278] 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, and terminal #3 of 902_3." 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". Figure 18 (A) Figure 18 In (B), the horizontal axis is time.

[0279] 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.

[0280] Next, the terminals "Terminal #1 of 902_1, Terminal #2 of 902_2, Terminal #3 of 902_3" transmit the sector scanning reference signal 1851_1. Figure 13 、 Figure 14 etc., so the description is omitted.

[0281] Base station #1 of 901_1 sends feedback signal 1802_1. Figure 16 The description has been given, so the description is omitted.

[0282] Then, the base station #1 of 901_1 transmits "frame 1803_1 containing data symbols". Figure 17 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.)

[0283] Next, the terminals "Terminal #1 of 902_1, Terminal #2 of 902_2, Terminal #3 of 902_3" transmit "frame 1852_1 including data symbols". In addition, the structure of this frame will be described later. Figure 20 (Thus, "frame 1852_1 including data symbols" is considered to be an uplink frame, for example.)

[0284] Next, the base station #1 of 901_1 transmits "frame 1803_2 including data symbols". In addition, the method of constructing "frame 1803_2 including data symbols" is as follows: Figure 17 Carry out the method described in the description.

[0285] Next, the terminals "Terminal #1 of 902_1, Terminal #2 of 902_2, Terminal #3 of 902_3" transmit "frame 1852_2 containing data symbols". In addition, the structure of this frame will be described later. Figure 20 Provide explanation.

[0286] Figure 19 Shown Figure 18 Hereinafter, the transmission status of the modulated signal of the base station #1 of 901_1 and the transmission status of the modulated signal of terminals such as "terminal #1 of 902_1, terminal #2 of 902_2, and terminal #3 of 902_3" are given as examples.

[0287] 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.

[0288] 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, and terminal #3 of 902_3", which is continuous in time from Figure 18 (B) shows the transmission status of the modulated signals of "terminal #1 of 902_1, terminal #2 of 902_2, and terminal #3 of 902_3".

[0289] In addition, Figure 19 (A) Figure 19 In (B), the horizontal axis is time.

[0290] 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 construction method of "frame 1803_2 containing data symbols" is as follows: Figure 17 Carry out the method described in the description.

[0291] Next, the terminals "Terminal #1 of 902_1, Terminal #2 of 902_2, Terminal #3 of 902_3" transmit "frame 1852_3 containing data symbols". In addition, the structure of this frame will be described later. Figure 20 Provide explanation.

[0292] 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.

[0293] Next, the terminals "Terminal #1 of 902_1, Terminal #2 of 902_2, Terminal #3 of 902_3" transmit the sector scanning reference signal 1851_2. Figure 13 、 Figure 14 etc., so the description is omitted.

[0294] Base station #1 of 901_1 sends feedback signal 1802_2. Figure 16 The description has been given, so the description is omitted.

[0295] Then, the base station #1 of 901_1 transmits "frame 1803_4 containing data symbols". Figure 17 The description has been given, so the description is omitted.

[0296] Next, the terminals "Terminal #1 of 902_1, Terminal #2 of 902_2, Terminal #3 of 902_3" transmit "frame 1852_4 containing data symbols". In addition, the structure of this frame will be described later. Figure 20 Provide explanation.

[0297] In this way, before "base station #1 of 901_1 sends 'frames containing data codewords', and / or 'terminal #1 of 902_1, terminal #2 of 902_2, terminal #3 of 902_3, etc. send 'frames containing data codewords'", base station #1 of 901_1 and the terminal send a reference signal for sector scanning, and after "base station #1 of 901_1 sends 'frames containing data codewords', and / or 'terminal #1 of 902_1, terminal #2 of 902_2, terminal #3 of 902_3, etc. send 'frames containing data codewords'", the reference signal for sector scanning is sent again, the transmission panel antenna to be used is selected, and the transmission beamforming is set, thereby achieving the following effect, that is, the base station and the terminal can obtain high data reception quality.

[0298] Next, use Figure 20The following describes a structural example of a "frame 1852_i containing data symbols" transmitted by terminals such as "terminal #1 of 902_1, terminal #2 of 902_2, and terminal #3 of 902_3". For example, i is set to an integer greater than 1. Figure 20 , the horizontal axis is time.

[0299] like Figure 20 As shown, the "frame 1852_i containing data codewords" is composed of the first time interval, the second time interval, the third time interval, and the fourth time interval.

[0300] For example, terminal #1 at 902_1 transmits frame 2001_1 (including data symbols) using the first time interval, and terminal #2 at 902_2 transmits frame 2001_2 (including data symbols) using the third time interval.

[0301] In this way, for example, 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, and terminal #3 of 902_3", 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.

[0302] In addition, Figure 20 In frame 2001_1, in addition to data codewords, it can also include, for example, "reference signals such as DMRS, PTRS, SRS", pilot codewords, pilot signals, preambles, codewords containing control information, etc.

[0303] Similarly, in frames such as frame 2001_1 and frame 2001_2 that are in the first time interval, the second time interval, the third time interval, and the fourth time interval, in addition to data code elements, they may also include, for example, "reference signals such as DMRS, PTRS, SRS", pilot code elements, pilot signals, preamble codes, code elements containing control information, etc.

[0304] exist Figure 20 In the description, the case of time division of the frames sent by the terminal is described, but the frames sent by the terminal can be frequency divided, and MU-MIMO (Multi User-MIMO (Multiple-Input Multiple-Output)) can also be used for spatial division.

[0305] exist Figure 14 In the figure, it is shown that Figure 13The example of the terminal occupancy is shown as follows: "the first terminal sends the reference signal for sector scanning in interval 1301_1, the second terminal sends the reference signal for sector scanning in interval 1301_2, the third terminal sends the reference signal for sector scanning in interval 1301_3, and the fourth terminal sends the reference signal for sector scanning in interval 1301_4". Figure 21 In the description, it is different from Figure 14 Examples, i.e., illustrating Figure 13 The example of terminal occupancy is shown as follows: "1st terminal uses 'sector scan reference signal' transmission interval 1301_1, 2nd terminal uses 'sector scan reference signal' transmission interval 1301_2, 3rd terminal uses 'sector scan reference signal' transmission interval 1301_3, and 4th terminal uses 'sector scan reference signal' transmission interval 1301_4."

[0306] exist Figure 21 In the Figure 13 、 Figure 14 The same reference numerals are attached to the parts of the same operation, and the description thereof is omitted because they have already been described. Figure 14 The description in is different.

[0307] 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)".

[0308] For example, terminal #3 of 902_3 estimates "transmitting panel antenna a3 and parameter b3" as the "transmitting panel antenna and parameters" with good reception quality.

[0309] In addition, while estimating the "transmitting panel antenna and parameters" with good reception quality, terminal #3 of 902_3 obtains information on "the number of time slots in which the reference signal for sector scanning can be transmitted when the terminal transmits the reference signal for sector scanning (the number of terminals that can transmit the reference signal for sector scanning)". Figure 21 In this case, terminal #3 of 902_3 obtains the information that "when the terminal sends a reference signal for sector scanning, the number of time slots in which the reference signal for sector scanning can be sent (the number of terminals that can send a reference signal for sector scanning)" is 4.

[0310] In this case, the terminal #3 of 902_3 uses a 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 a random number. In this case, since "2" + 1 = 3, the terminal #3 of 902_3 uses Figure 21 The "3rd (="2"+1)" terminal transmits the sector scanning reference signal 2101_3 using the "sector scanning reference signal" transmission interval 1301_3.

[0311] Furthermore, it is assumed that the sector scanning reference signal 2101_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."

[0312] At this time, if Figure 21 As shown, the time intervals between "sector scanning reference signal 1401_2 transmitted by terminal #2 of 902_2" and "sector scanning reference signal 2101_3 transmitted by terminal #3 of 902_3" overlap.

[0313] Therefore, base station #1 at 901_1 may simultaneously receive "sector scanning reference signal 1401_2 transmitted by terminal #2 at 902_2" and "sector scanning reference signal 2101_3 transmitted by terminal #3 at 902_3".

[0314] In this context, the following two examples can be considered.

[0315] <Example 1>

[0316] "Sector scanning reference signal 1401_2 transmitted by terminal #2 of 902_2" and "Sector scanning reference signal 2101_3 transmitted by terminal #3 of 902_3" are both Figure 15 structure.

[0317] At this time, "the parameters of the transmitting panel antenna and beamforming of terminal #2 of 902_2 with good reception quality when base station #1 of 901_1 receives the reference signal 1401_2 for sector scanning sent by terminal #2 of 902_2" are different from "the parameters of the transmitting panel antenna and beamforming of terminal #3 of 902_3 with good reception quality when base station #1 of 901_1 receives the reference signal 1401_3 for sector scanning sent by terminal #3 of 902_3". Therefore, base station #1 of 901_1 will obtain the information contained in "the reference signal 1401_2 for sector scanning sent by terminal #2 of 902_2" and the information contained in "the reference signal 2101_3 for sector scanning sent by terminal #3 of 902_3".

[0318] In this case, for example, “ Figure 16 The feedback signal 1601_1 sent to the first terminal is set to the signal sent to terminal #1 of 902_1", "the feedback signal 1601_2 sent to the second terminal is set to the signal sent to terminal #3 of 902_3", and "the feedback signal 1601_3 sent to the third terminal is set to the signal sent to terminal #2 of 902_2".

[0319] In addition, for example, “ Figure 17 The modulation signal (time slot) 1701_1 sent to the first terminal is set to the signal sent to terminal #1 of 902_1", "the modulation signal (time slot) 1701_2 sent to the second terminal is set to the signal sent to terminal #3 of 902_3", and "the modulation signal (time slot) 1701_3 sent to the third terminal is set to the signal sent to terminal #2 of 902_2".

[0320] As a result, base station #1 of 901_1 can communicate with (terminal #1 of 902_1), terminal #2 of 902_2, and terminal #3 of 902_3.

[0321] <Example 2>

[0322] "Sector scanning reference signal 1401_2 transmitted by terminal #2 of 902_2" and "Sector scanning reference signal 2101_3 transmitted by terminal #3 of 902_3" are both Figure 15 structure.

[0323] At this time, it is assumed that "when the base station #1 of 901_1 receives the reference signal 1401_2 for sector scanning sent by the terminal #2 of 902_2, the reception quality of 'the transmitting panel antenna and beamforming parameters of terminal #2 of 902_2' is good" interferes with "when the base station #1 of 901_1 receives the reference signal 1401_3 for sector scanning sent by the terminal #3 of 902_3, the reception quality of 'the transmitting panel antenna and beamforming parameters of terminal #3 of 902_3' is good".

[0324] <Example 2-1>

[0325] Sometimes, base station #1 at 901_1 obtains either information included in "sector scanning reference signal 1401_2 transmitted by terminal #2 at 902_2" or information included in "sector scanning reference signal 2101_3 transmitted by terminal #3 at 902_3".

[0326] For example, base station #1 at 901_1 obtains information included in "sector scanning reference signal 1401_2 transmitted by terminal #2 at 902_2".

[0327] In this case, for example, “ Figure 16The feedback signal 1601_1 sent to the first terminal is set to the signal sent to the terminal #1 of 902_1, and the feedback signal 1601_3 sent to the third terminal is set to the signal sent to the terminal #2 of 902_2.

[0328] In addition, for example, “ Figure 17 The modulated signal (time slot) 1701_1 sent to the first terminal is set to the signal sent to terminal #1 of 902_1", and the modulated signal (time slot) 1701_3 sent to the third terminal is set to the signal sent to terminal #2 of 902_2.

[0329] As a result, base station #1 of 901_1 can communicate with (terminal #1 of 902_1) and terminal #2 of 902_2.

[0330] The operation of terminal #3 of 902_3 is described.

[0331] Assumptions Figure 18 The sector scan reference signal 1851_1 is in Figure 21 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.

[0332] 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 "ID (identification) of the transmitting panel antenna" with good reception quality and the "identification (ID) of the parameters used for beamforming (directivity control)", and communicates with the base station #1 of 901_1.

[0333] For example, terminal #3 of 902_3 estimates "transmitting panel antenna a3 and parameter b3" as the "transmitting panel antenna and parameters" with good reception quality.

[0334] Furthermore, while estimating the "transmitting panel antenna and parameters" with good reception quality, terminal #3 in 902_3 obtains information on the "number of time slots in which the terminal can transmit the sector scanning reference signal (the number of terminals that can transmit the sector scanning reference signal) when transmitting the sector scanning reference signal." Terminal #3 in 902_3 obtains information that the "number of time slots in which the terminal can transmit the sector scanning reference signal (the number of terminals that can transmit the sector scanning reference signal)" is 4.

[0335] 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 that 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 uses Figure 22 The "4th (= "3" + 1)" terminal transmits the sector scanning reference signal 2201_3 using the "sector scanning reference signal" transmission interval 1301_4.

[0336] Furthermore, it is assumed that the sector scanning reference signal 2201_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."

[0337] At this time, if Figure 22 As shown, base station #1 of 901_1 receives "sector scanning reference signal 2201_3 transmitted by terminal #3 of 902_3", and then performs the prescribed process, and base station #1 of 901_1 communicates with terminal #3 of 902_3.

[0338] <Example 2-2>

[0339] Base station #1 at 901_1 may not be able to obtain both the information included in "sector scanning reference signal 1401_2 transmitted by terminal #2 at 902_2" and the information included in "sector scanning reference signal 2101_3 transmitted by terminal #3 at 902_3".

[0340] Assumptions Figure 18 The sector scan reference signal 1851_1 is in Figure 21 In such a state, the base station #1 of 901_1 cannot obtain both the information contained in the "sector scanning reference signal 1401_2 transmitted by the terminal #2 of 902_2" and the information contained in the "sector scanning reference signal 2101_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.

[0341] In this case, Figure 9 Terminal #2 of 902_2 can receive the signal sent by base station #1 of 901_1. Figure 19The sector scan uses reference signal 1801_2, and obtains the "ID (identification) of the transmitting panel antenna" with good reception quality and the "identification (ID) of the parameters used for beamforming (directivity control)", and communicates with the base station #1 of 901_1.

[0342] For example, terminal #2 of 902_2 estimates "transmitting panel antenna a2 and parameter b2" as the "transmitting panel antenna and parameters" with good reception quality.

[0343] Furthermore, while estimating the "transmitting panel antenna and parameters" with good reception quality, terminal #2 in 902_2 obtains information on the "number of time slots in which the terminal can transmit the sector scanning reference signal (the number of terminals that can transmit the sector scanning reference signal) when transmitting the sector scanning reference signal." Terminal #2 in 902_2 obtains information that the "number of time slots in which the terminal can transmit the sector scanning reference signal (the number of terminals that can transmit the sector scanning reference signal)" is 4.

[0344] 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 from the previous one to generate a random number and obtains "2". In this case, since "2" + 1 = 3, the terminal #2 of 902_2 uses Figure 22 The "3rd (="2"+1)" terminal transmits the sector scanning reference signal 1401_2 using the "sector scanning reference signal" transmission interval 1301_3.

[0345] Furthermore, it is assumed that sector scanning reference signal 1401_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."

[0346] At this time, if Figure 22 As shown, base station #1 of 901_1 receives "sector scanning reference signal 1401_2 transmitted by terminal #2 of 902_2", and then performs the prescribed process, and base station #1 of 901_1 communicates with terminal #2 of 902_2.

[0347] Likewise, 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 "ID (identification) of the transmitting panel antenna" with good reception quality and the "identification (ID) of the parameters used for beamforming (directivity control)", and communicates with the base station #1 of 901_1.

[0348] For example, terminal #3 of 902_3 estimates "transmitting panel antenna a3 and parameter b3" as the "transmitting panel antenna and parameters" with good reception quality.

[0349] Furthermore, while estimating the "transmitting panel antenna and parameters" with good reception quality, terminal #3 in 902_3 obtains information on the "number of time slots in which the terminal can transmit the sector scanning reference signal (the number of terminals that can transmit the sector scanning reference signal) when transmitting the sector scanning reference signal." Terminal #3 in 902_3 obtains information that the "number of time slots in which the terminal can transmit the sector scanning reference signal (the number of terminals that can transmit the sector scanning reference signal)" is 4.

[0350] 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, 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 uses Figure 22 The "4th (= "3" + 1)" terminal transmits the sector scanning reference signal 2201_3 using the "sector scanning reference signal" transmission interval 1301_4.

[0351] Furthermore, it is assumed that sector scanning reference signal 2201_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."

[0352] At this time, if Figure 22 As shown, base station #1 of 901_1 receives "sector scanning reference signal 2201_3 transmitted by terminal #3 of 902_3", and then performs the prescribed process, and base station #1 of 901_1 communicates with terminal #3 of 902_3.

[0353] 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.

[0354] As described in the present embodiment, the terminal transmits a reference signal for sector scanning in a manner that reduces the number of collisions, thereby achieving the following effect: improving the communication capacity of a system composed of a base station and a 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 15 、 Figure 16 、 Figure 17 、 Figure 18 、 Figure 19 、 Figure 20 、 Figure 21 、 Figure 22 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.

[0355] (Implementation Method 2)

[0356] This embodiment, as a variation of Embodiment 1, describes an example in which a base station transmits multiple modulated signals (multiple streams) to a terminal. (That is, this embodiment describes an example in which MIMO (Multiple-Input Multiple-Output) is implemented.)

[0357] Figure 9 An example of the communication state in this embodiment is shown. Since the details have been described, the description thereof will be omitted.

[0358] Figure 23 Shown Figure 9 An example of a modulated signal 2300 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.

[0359] In the time interval from time t0 to time t1, a sector scanning reference signal 1001 exists.

[0360] The time interval from time t1 to time t2 is the response interval of the terminal.

[0361] In the time interval from time t2 to time t3, there is a feedback signal group 2302. In addition, the feedback signal group 2302 will be described later.

[0362] In the time interval from time t4 to time t5, there is a frame group 2303 including data symbols. Frame group 2303 including data symbols will be described later.

[0363] Figure 11 Shown Figure 9 Base station #1 sends Figure 23 An example of a sector scan reference signal 1001. Figure 11 The operation has been explained, so the explanation is omitted.

[0364] 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 explained, so the explanation is omitted.

[0365] Figure 13 The example of the operation of the terminal response interval, that is, the time interval from time t1 to time t2, is shown. Figure 13 The operation has been explained, so the explanation is omitted.

[0366] Figure 14 Shown with Figure 13 The example of terminal occupancy is shown as follows: "Terminal 1 transmits 'sector scan reference signal' interval 1301_1, terminal 2 transmits 'sector scan reference signal' interval 1301_2, terminal 3 transmits 'sector scan reference signal' interval 1301_3, and terminal 4 transmits 'sector scan reference signal' interval 1301_4". Figure 14 The actions of have been described, so different parts of the actions in this embodiment will be described.

[0367] Assumptions 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.

[0368] In this case, the two "transmitting panel antennas and parameter numbers" with good reception quality are referred to as the first "transmitting panel antenna and parameter number" and the second "transmitting panel antenna and parameter number." Furthermore, it is assumed that 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 different.

[0369] Furthermore, 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 parameters used for beamforming (directivity control)" contained in the sector scanning reference signal 1001.

[0370] Assume that terminal #1 of 902_1 estimates that "transmitting panel antenna a1_1 and parameter b1_1" and "transmitting panel antenna a1_2 and parameter b1_2" are two "transmitting panel antennas and parameters" with good reception quality. (In addition, the following uses Figure 24 For the purpose of explanation, "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 (901_1 of base station #1) 106_2's transmitting panel antenna 2.)

[0371] In addition, while estimating the "transmitting panel antenna and parameters" with good reception quality, terminal #1 of 902_1 obtains information on "the number of time slots in which the reference signal for sector scanning can be transmitted when the terminal transmits the reference signal for sector scanning (the number of terminals that can transmit the reference signal for sector scanning)". Figure 14 In this case, terminal #1 of 902_1 obtains the information that "when the terminal sends a reference signal for sector scanning, the number of time slots in which the reference signal for sector scanning can be sent (the number of terminals that can send a reference signal for sector scanning)" is 4.

[0372] 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 "first (="0"+1) terminal" transmits a sector scanning reference signal 1401_1 in the "sector scanning reference signal" transmission interval 1301_1.

[0373] Furthermore, it is assumed that sector scan reference signal 1401_1 includes information on "transmitting panel antennas and parameters" with good reception quality achieved by terminal #1 at 902_1, namely, information on "transmitting panel antenna a1_1 and parameters b1_1" and information on "transmitting panel antenna a1_2 and parameters b1_2." Furthermore, sector scan reference signal 1401_1 may also include information requesting the number of modulated signals (streams) transmitted by base station #1 at 901_1 (here, "2") from terminal #1 at 902_1.

[0374] Likewise, Figure 9 Terminal #2 at 902_2 receives sector scanning reference signal 1001 transmitted by base station #1 at 901_1 and estimates the "transmitting panel antenna and parameter number" of the transmitting panel antenna of base station #1 at 901_1 that has good reception quality. This estimation can be performed by obtaining sector scanning reference signal 1001 and the "transmitting panel antenna ID" and "beamforming (directivity control) parameter ID" contained in sector scanning reference signal 1001.

[0375] Assume that terminal #2 of 902_2 estimates that "transmitting panel antenna a2_1 and parameter b2_1" are "transmitting panel antenna and parameters" with good reception quality. (In addition, the following uses Figure 24 For the purpose of explanation, the "transmitting panel antenna a2_1" is set to Figure 1A 、 Figure 1B 、 Figure 1C (901_1 of base station #1) 106_1 of the transmitting panel antenna 3.)

[0376] In addition, while estimating the "transmitting panel antenna and parameters" with good reception quality, terminal #2 of 902_2 obtains information on "the number of time slots in which the reference signal for sector scanning can be transmitted when the terminal transmits the reference signal for sector scanning (the number of terminals that can transmit the reference signal for sector scanning)". Figure 14 In this case, terminal #2 of 902_2 obtains the information that "when the terminal sends a reference signal for sector scanning, the number of time slots in which the reference signal for sector scanning can be sent (the number of terminals that can send a reference signal for sector scanning)" is 4.

[0377] In this case, it is assumed that the terminal #2 of 902_2 obtains a value such as "0", "1", "2", or "3" using a random number. For example, the terminal #2 of 902_2 obtains "2" using a random number. In this case, since "2" + 1 = 3, the terminal #2 of 902_2 uses Figure 14The "3rd (="2"+1)" terminal transmits the sector scanning reference signal 1401_2 in the "sector scanning reference signal" transmission interval 1301_3.

[0378] Furthermore, it is assumed that sector scan reference signal 1401_2 includes information on the "transmitting panel antenna and parameters" with which terminal #2 at 902_2 has good reception quality, namely, information on "transmitting panel antenna a2 and parameters b2." This will be explained later. Specifically, it is assumed that information on "transmitting panel antenna a2_1 and parameters b2_1" is included. Furthermore, sector scan reference signal 1401_2 may also include information requesting the number of modulated signals (streams) transmitted by base station #1 at 901_1 from terminal #2 at 902_2 (here, "1").

[0379] This reduces collisions between sector-scanning reference signals transmitted by various terminals, thereby increasing the number of sector-scanning reference signals that the base station can receive. This, in turn, increases the number of terminals that can communicate with the base station. Furthermore, as described above, the base station can transmit one or more modulated signals (streams) to each terminal.

[0380] For used Figure 14 The structure of the sector scanning reference signal 1401_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, assuming that 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 terminal #i of the structure 902_i having the transmitting panel antenna xi of 106_xi is not limited to Figure 3 .

[0381] Figure 11 An example of a sector scanning reference signal 1401_i transmitted by terminal #i of 902_i is shown. Figure 11 , the horizontal axis is time.

[0382] For example, with Figure 1A 、 Figure 1B 、 Figure 1CTerminal #i of the structure 902_i transmits reference signal 1101_1 for sector scanning in transmitting panel antenna 1 from transmitting panel antenna 1 106_1.

[0383] Therefore, if Figure 11 As shown, with Figure 1A 、 Figure 1B 、 Figure 1C Terminal #i of 902_i of the configuration transmits a sector scanning reference signal 1101_xi from a transmission panel antenna xi of 106_xi. Here, xi is an integer greater than or equal to 1 and less than or equal to M.

[0384] Figure 15 Shown Figure 11 The structure example of "sector scanning reference signal 1101_xi in the transmission panel antenna xi". Figure 15 The operation has been explained, so the explanation is omitted.

[0385] Figure 24 Shows the Figure 23 An example of the structure of the feedback signal group 2302 sent by the base station #1 of 901_1 in the time interval from t2 to t3. Figure 24 In the example, the horizontal axis represents time. For simplicity of explanation, it is assumed that the base station 1 of 901_1 includes four transmission panel antennas: transmission panel antenna 1 of 106_1, transmission panel antenna 2 of 106_2, transmission panel antenna 3 of 106_3, and transmission panel antenna 4 of 106_4.

[0386] In this example, since "the number of time slots in which the reference signal for sector scanning can be transmitted when the terminal transmits the reference signal for sector scanning (the number of terminals that can transmit the reference signal for sector scanning)" is 4, Figure 24 As shown, feedback signal 2302 includes four feedback signal groups addressed to terminals: feedback signal group 2400_1 addressed to the first terminal, feedback signal group 2400_2 addressed to the second terminal, feedback signal group 2400_3 addressed to the third terminal, and feedback signal group 2400_4 addressed to the fourth terminal. Furthermore, for example, if "the number of time slots in which a terminal can transmit a sector scanning reference signal (the number of terminals that can transmit a sector scanning reference signal) when transmitting a sector scanning reference signal" is Ω, a configuration may be such that feedback signal group 2302 includes Ω feedback signal groups addressed to terminals. Ω is an integer greater than or equal to 1 or an integer greater than or equal to 2.

[0387] The term "feedback signal group" is used for explanation because the feedback signal can be present at transmitting panel antenna 1 of 106_1, the feedback signal can be present at transmitting panel antenna 2 of 106_2, the feedback signal can be present at transmitting panel antenna 3 of 106_3, and the feedback signal can be present at transmitting panel antenna 4 of 106_4.

[0388] For example, in Figure 14 In that case, when the sector scanning reference signal 1401_1 is sent by terminal #1 of 902_1 and the sector scanning reference signal 1401_2 is sent by terminal #2 of 902_2, the base station #1 of 901_1 uses the feedback signal group 2400_1 sent to the first terminal to send the feedback signal group to terminal #1 of 902_1, and uses the feedback signal group 2400_3 sent to the third terminal to send the feedback signal group to terminal #2 of 902_2.

[0389] like Figure 24 As shown, the feedback signal group 2400_1 sent to the first terminal is composed of the "feedback signal (1) sent to the terminal #1 of 902_1" of 2401_1 sent from the transmitting panel antenna 1 of 106_1 of the base station #1 of 901_1, and the "feedback signal (2) sent to the terminal #1 of 902_1" of 2401_2 sent from the transmitting panel antenna 2 of 106_2 of the base station #1 of 901_1.

[0390] In this way, the reason why the feedback signal group 2400_1 sent to the first terminal is composed of the "feedback signal (1) sent to terminal #1 of 902_1" of 2401_1 and the "feedback signal (2) sent to terminal #1 of 902_1" of 2401_2 is that: "Base station #1 of 901_1 sends two modulated signals (streams) to terminal #1 of 902_1."

[0391] Moreover, if Figure 24 As shown, the feedback signal group 2400_3 sent to the third terminal is composed of the "feedback signal sent to the terminal #2 of 902_2" of 2402_1 transmitted from the transmitting panel antenna 3 of 106_3 of the base station #1 of 901_1.

[0392] At this time, it is assumed that the "feedback signal (1) sent to the terminal #1 of 902_1" includes, for example, information that (the base station #1 of 901_1) and the terminal #1 of 902_1 can communicate using the transmitting panel antenna 1 of 106_1.

[0393] Furthermore, it is assumed that the "feedback signal (2) sent to the terminal #1 of 902_1" includes, for example, information that (the base station #1 of 901_1) and the terminal #1 of 902_1 can communicate using the transmitting panel antenna 2 of 106_2.

[0394] Furthermore, it is assumed that the “feedback signal to terminal #2 at 902_2” includes, for example, information that (base station #1 at 901_1) and terminal #2 at 902_2 can communicate using the transmitting panel antenna 3 at 106_3.

[0395] Furthermore, based on the "information on the 'transmitting panel antennas and parameters' of the two base stations 901_1 with good reception quality" sent by terminal 902_1, base station 901_1 selects a transmitting panel antenna, sets beamforming parameters, and transmits feedback signal 2400_1 to terminal 1. (This is the reason for using two transmitting panel antennas.)

[0396] Similarly, based on the "information on the 'transmitting panel antenna and parameters' of base station #1 of 901_1 with good reception quality" sent by terminal #2 of 902_2, base station #1 of 901_1 selects a transmitting panel antenna, sets beamforming parameters, and sends a feedback signal 2400_3 to the third terminal.

[0397] Figure 25 Shows the Figure 23 An example of the structure of the frame group 2303 containing data symbols transmitted by the base station #1 of 901_1 in the time interval from t4 to t5. Figure 25 , the horizontal axis is time.

[0398] In this example, since "the number of time slots in which the reference signal for sector scanning can be transmitted when the terminal transmits the reference signal for sector scanning (the number of terminals that can transmit the reference signal for sector scanning)" is 4, Figure 25 As shown, in frame group 2303 containing data symbols, there are four groups of modulation signals (time slots) destined for the terminals: group 2500_1 for modulation signals (time slots destined for the first terminal), group 2500_2 for modulation signals (time slots destined for the second terminal), group 2500_3 for modulation signals (time slots destined for the third terminal), and group 2500_4 for modulation signals (time slots destined for the fourth terminal). Furthermore, for example, if "the number of time slots in which a terminal can transmit a sector scanning reference signal (the number of terminals that can transmit a sector scanning reference signal) when the terminal transmits a sector scanning reference signal" is Ω, a configuration may be such that, in frame group 2303 containing data symbols, there are Ω groups of modulation signals (time slots) destined for the terminals. Here, Ω is an integer greater than or equal to 1 or an integer greater than or equal to 2.

[0399] In addition, it is called a "frame group containing data codewords" because: the frame containing data codewords can be present at the transmitting panel antenna 1 of 106_1, the frame containing data codewords can be present at the transmitting panel antenna 2 of 106_2, the frame containing data codewords can be present at the transmitting panel antenna 3 of 106_3, and the frame containing data codewords can be present at the transmitting panel antenna 4 of 106_4.

[0400] For example, in Figure 14 In that case, when the reference signal 1401_1 for sector scanning is sent by terminal #1 of 902_1 and the reference signal 1401_2 for sector scanning is sent by terminal #2 of 902_2, the base station #1 of 901_1 uses the modulation signal (time slot sent to the first terminal) group 2500_1 sent to the first terminal to send the modulation signal (time slot) group to terminal #1 of 902_1, and uses the modulation signal (time slot sent to the first terminal) 2500_3 sent to the third terminal to send the modulation signal (time slot) group to terminal #2 of 902_2.

[0401] like Figure 25 As shown, the modulation signal (time slot sent to the first terminal) group 2500_1 sent to the first terminal is composed of the "modulation signal (time slot) (1) sent to the terminal #1 of 902_1" of 2501_1 sent from the transmission panel antenna 1 of 106_1 of the base station #1 of 901_1, and the "modulation signal (time slot) (2) sent to the terminal #1 of 902_1" of 2501_2 sent from the transmission panel antenna 2 of 106_2 of the base station #1 of 901_1.

[0402] In this way, the reason why the modulation signal (time slot sent to the first terminal) group 2500_1 sent to the first terminal is composed of the "modulation signal (time slot) (1) sent to terminal #1 of 902_1" of 2501_1 and the "modulation signal (time slot) (2) sent to terminal #1 of 902_1" of 2501_2 is that: "Base station #1 of 901_1 sends two modulation signals (streams) to terminal #1 of 902_1".

[0403] Moreover, if Figure 25 As shown, the modulated signal (time slot sent to the first terminal) 2500_3 sent to the third terminal is composed of the "modulated signal (time slot) sent to the terminal #2 of 902_2" of 2502_1 transmitted from the transmitting panel antenna 3 of 106_3 of the base station #1 of 901_1.

[0404] At this time, it is assumed that the "modulated signal (time slot) (1) addressed to the terminal #1 of 902_1" includes, for example, a data symbol (data, information) addressed to the terminal #1 of 902_1.

[0405] Furthermore, it is assumed that the "modulated signal (time slot) (2) addressed to terminal #1 of 902_1" also includes, for example, data symbols (data, information) addressed to terminal #1 of 902_1.

[0406] In addition, it is assumed that the "modulated signal (time slot) addressed to terminal #2 of 902_2" includes, for example, a data symbol (data, information) addressed to terminal #2 of 902_2.

[0407] Furthermore, based on the "information on the 'transmitting panel antennas and parameters' of the two base stations 901_1 with good reception quality" sent by terminal 902_1, base station 901_1 selects a transmitting panel antenna, sets beamforming parameters, and transmits modulated signal group 2500_1 (time slots for terminal 1). (This is the reason for using two transmitting panel antennas.)

[0408] Similarly, based on the "information on the 'transmitting panel antenna and parameters' of base station #1 of 901_1 with good reception quality" sent by terminal #2 of 902_2, base station #1 of 901_1 selects the transmitting panel antenna, sets the parameters of beamforming, and sends the modulated signal 2500_3 to the third terminal (time slot to the first terminal).

[0409] In addition, Figure 25 In addition to data symbols, the modulated signal group 2500_1 (time slot for the first terminal) for the first terminal 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 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.

[0410] Similarly, in addition to data symbols, the modulated signal group 2500_2 (time slots for the second terminal), the modulated signal group 2500_3 (time slots for the third terminal), and the modulated signal group 2500_4 (time slots for the fourth terminal) 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 include information about the destination terminal (an ID that can identify the terminal), the modulation signal transmission method, information about the modulation scheme, information about the error correction coding scheme (code length, coding rate, etc.), and information about the MCS.

[0411] Figure 26 Shown Figure 9An example of a situation in which base station #1 of 901_1 communicates with "terminal #1 of 902_1 and terminal #2 of 902_2". Figure 26 (A) shows an example of the transmission status of the modulated signal of the base station #1 of 901_1. Figure 26 (B) shows an example of the transmission status of the modulated signal of "Terminal #1 of 902_1, Terminal #2 of 902_2". Figure 26 (A) Figure 26 In (B), the horizontal axis is time. Figure 26 In the Figure 18 The same reference numerals are attached to parts that operate in the same manner.

[0412] First, the base station #1 of 901_1 transmits the sector scanning reference signal 1801_1. Figure 23 The description has been given, so the description is omitted.

[0413] Next, the terminals such as "terminal #1 of 902_1 and terminal #2 of 902_2" transmit the sector scanning reference signal 1851_1. Figure 13 、 Figure 14 etc., so the description is omitted.

[0414] Base station #1 of 901_1 sends feedback signal group 2602_1. Figure 24 The description has been given, so the description is omitted.

[0415] Then, the base station #1 of 901_1 transmits "frame group 2603_1 including data symbols". Figure 25 Since the above description has been given, the description thereof will be omitted. (Therefore, "frame 2603_1 including data symbols" is considered to be a frame for downlink, for example.)

[0416] Next, the terminals "Terminal #1 of 902_1, Terminal #2 of 902_2" and so on transmit "frame group 2652_1 including data symbols". In addition, the structure of this frame will be described later. Figure 28 (Thus, the "frame group 2652_1 including data symbols" is considered to be an uplink frame, for example.)

[0417] Next, the base station #1 of 901_1 transmits "frame group 2603_2 including data symbols". In addition, the method of forming "frame group 2603_2 including data symbols" is as follows: Figure 24 Carry out the method described in the description.

[0418] Next, the terminals "Terminal #1 of 902_1, Terminal #2 of 902_2" and so on transmit "frame group 2652_2 including data symbols". In addition, the structure of this frame will be described later. Figure 28 Provide explanation.

[0419] Figure 27 Shown Figure 26 The following is an example of the transmission status of the modulated signal of the base station #1 of 901_1 and the transmission status of the modulated signal of the terminals such as "terminal #1 of 902_1 and terminal #2 of 902_2". Figure 27 In the Figure 18 The same reference numerals are attached to parts that operate in the same manner.

[0420] Figure 27 (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 26 (A) The transmission status of the modulated signal of base station #1 of 901_1.

[0421] Figure 27 (B) shows an example of the transmission status of the modulated signal of "terminal #1 of 902_1, terminal #2 of 902_2", which is continuous in time from Figure 26 (B) shows the transmission status of the modulated signals of "terminal #1 of 902_1, terminal #2 of 902_2, and terminal #3 of 902_3".

[0422] In addition, Figure 27 (A) Figure 27 In (B), the horizontal axis is time.

[0423] exist Figure 26 (A) Figure 26 After (B), the base station #1 of 901_1 transmits "frame group 2603_3 including data symbols". In addition, the method of forming "frame group 2603_2 including data symbols" is as follows: Figure 25 Carry out the method described in the description.

[0424] Next, the terminals "Terminal #1 of 902_1, Terminal #2 of 902_2" and so on transmit "Frame group 2652_3 including data symbols". In addition, the structure of this frame will be described later. Figure 28 Provide explanation.

[0425] Next, the base station #1 of 901_1 transmits the sector scanning reference signal 1801_2. Figure 23 The description has been given, so the description is omitted.

[0426] Next, the terminals such as "terminal #1 of 902_1 and terminal #2 of 902_2" transmit the sector scanning reference signal 1851_2. Figure 13 、 Figure 14 etc., so the description is omitted.

[0427] Base station #1 of 901_1 sends feedback signal group 2602_2. Figure 24 The description has been given, so the description is omitted.

[0428] Then, the base station #1 of 901_1 transmits "frame group 2603_4 containing data symbols". Figure 25 The description has been given, so the description is omitted.

[0429] Next, the terminals "Terminal #1 of 902_1, Terminal #2 of 902_2" and so on transmit "frame group 2652_4 including data symbols". In addition, the structure of this frame will be described later. Figure 28 Provide explanation.

[0430] In this way, before "base station #1 of 901_1 sends 'frame group containing data codewords', and / or 'terminal #1 of 902_1, terminal #2 of 902_2, etc. sends 'frame group containing data codewords'", base station #1 of 901_1 and the terminal send a reference signal for sector scanning, and after "base station #1 of 901_1 sends 'frame group containing data codewords', and / or 'terminal #1 of 902_1, terminal #2 of 902_2, etc. sends 'frame group containing data codewords'", the reference signal for sector scanning is sent again, the selection of the transmitting panel antenna to be used and the setting of the transmitting beamforming are performed, thereby achieving the following effect, that is, the base station and the terminal can obtain high data reception quality.

[0431] Next, use Figure 28 The following describes a structural example of a "frame group 2652_i containing data symbols" transmitted by terminals such as "terminal #1 of 902_1 and terminal #2 of 902_2". For example, i is set to an integer greater than 1. Figure 28 , the horizontal axis is time.

[0432] like Figure 28 As shown, the "frame group 2652_i including data codewords" is composed of the first time interval, the second time interval, the third time interval, and the fourth time interval.

[0433] For example, terminal #1 at 902_1 transmits frame group 2801_1 (including data symbols) using the first time interval, and terminal #2 at 902_2 transmits frame group 2801_2 (including data symbols) using the third time interval.

[0434] Alternatively, you can use Figure 25 Similarly, when multiple modulated signals are sent by base station #1 of 901_1, for example, when terminal #1 of 902_1 sends frame group 2801_1 to base station #1 of 901_1, terminal #1 of 902_1 uses multiple transmitting panel antennas to send multiple modulated signals (time slots) to base station #1 of 901_1.

[0435] Alternatively, when terminal #1 of 902_1 transmits frame group 2801_1 to base station #1 of 901_1, terminal #1 of 902_1 may transmit one modulated signal (time slot) to base station #1 of 901_1.

[0436] In this way, for example, by time-splitting the "frame group 2652_i containing data codewords" sent by terminals such as "terminal #1 of 902_1, terminal #2 of 902_2", each terminal sends a frame group, and the base station #1 of 901_1 receives the frame group sent by each terminal, thereby suppressing interference and thus achieving high data reception quality.

[0437] In addition, Figure 28 In the frame group 2801_1, in addition to data codewords, it can also include, for example, "reference signals such as DMRS, PTRS, SRS", pilot codewords, pilot signals, preambles, codewords containing control information, etc.

[0438] Similarly, in frames such as frame group 2801_1, frame group 2801_2, etc. that are in the first time interval, the second time interval, the third time interval, and the fourth time interval, in addition to data code elements, they may also include, for example, "reference signals such as DMRS, PTRS, SRS", pilot code elements, pilot signals, preamble codes, code elements containing control information, etc.

[0439] exist Figure 28 In the description, the case of time division of the frame group sent by the terminal is described, but the frame group sent by the terminal can be frequency divided or spatially divided using MU-MIMO.

[0440] As described in the present embodiment, the terminal transmits a reference signal for sector scanning in a manner that reduces the number of collisions, thereby achieving the following effect: improving the communication capacity of a system composed of a base station and a 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 4For 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 15 、 Figure 16 、 Figure 17 、 Figure 18 、 Figure 19 、 Figure 20 、 Figure 21 、 Figure 22 、 Figure 23 、 Figure 24 、 Figure 25 、 Figure 26 、 Figure 27 、 Figure 28 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.

[0441] (Implementation 3)

[0442] This embodiment describes a modification of Embodiment 1 and Embodiment 2. In the following description, the figures shown in Embodiment 1 and / or Embodiment 2 may be cited. In such cases, the description of a portion of the figures shown in Embodiment 1 and / or Embodiment 2 may be omitted.

[0443] Figure 29 An example of the communication state in this embodiment is shown. Figure 29 In the Figure 9 The same reference numerals are assigned to parts that perform the same operations, and description thereof will be omitted.

[0444] exist Figure 29 In the example, base station #1 of 901_1 communicates with terminals #1 to #3, and also communicates with terminal #4 of 2902_4, terminal #5 of 2902_5, and terminal #6 of 2902_6.

[0445] Figure 30 Shown Figure 29 An example of a modulated signal 3000 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.

[0446] In the time interval from time t0 to time t1, a sector scanning reference signal 1001 exists.

[0447] The time interval from time t1 to time t2 is the response interval of the terminal.

[0448] In the time interval from time t2 to time t3, there is a feedback signal group 3002. In addition, the feedback signal group 3002 will be described later.

[0449] In the time interval from time t4 to time t5, there is a frame group 3003 including data symbols. Frame group 3003 including data symbols will be described later.

[0450] Figure 11 Shown Figure 29 Base station #1 sends Figure 30 An example of a sector scan reference signal 1001. Figure 11 The operation has been explained, so the explanation is omitted.

[0451] 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 explained, so the explanation is omitted.

[0452] Figure 13 The example of the operation of the terminal response interval, that is, the time interval from time t1 to time t2, is shown. Figure 13 The operation has been explained, so the explanation is omitted.

[0453] Figure 14 Shown with Figure 13 The example of terminal occupancy is shown as follows: "Terminal 1 transmits 'sector scan reference signal' interval 1301_1, terminal 2 transmits 'sector scan reference signal' interval 1301_2, terminal 3 transmits 'sector scan reference signal' interval 1301_3, and terminal 4 transmits 'sector scan reference signal' interval 1301_4". Figure 14 The action has been described in Implementation 1, Implementation 2, etc., so the description is omitted.

[0454] Figure 15 Shown Figure 11 The structure example of "sector scanning reference signal 1101_xi in the transmission panel antenna xi". Figure 15 The operation has been explained, so the explanation is omitted.

[0455] Figure 31A 、 Figure 31B 、 Figure 31C and Figure 31D Shows the Figure 30 An example of the structure of the feedback signal group 3002 sent by the base station #1 of 901_1 in the time interval from t2 to t3. Figure 31A 、 Figure 31B 、 Figure 31C and Figure 31D In the example, the horizontal axis represents time. For simplicity of explanation, it is assumed that base station #1 at 901_1 includes four transmission panel antennas: transmission panel antenna 1 at 106_1, transmission panel antenna 2 at 106_2, transmission panel antenna 3 at 106_3, and transmission panel antenna 4 at 106_4.

[0456] and, Figure 31A This is a diagram related to the feedback signal of the transmitting panel antenna 1 of 106_1 in the feedback signal group 3002. Figure 31B This is a diagram related to the feedback signal of the transmitting panel antenna 2 of 106_2 in the feedback signal group 3002. Figure 31C This is a diagram related to the feedback signal of the transmitting panel antenna 3 of 106_3 in the feedback signal group 3002. Figure 31D This is a diagram related to the feedback signal of the transmitting panel antenna 4 of 106_4 in the feedback signal group 3002.

[0457] exist Figure 31A In the example, since "when the terminal sends the reference signal for sector scanning, the number of time slots in which the reference signal for sector scanning can be sent (the number of terminals that can send the reference signal for sector scanning)" is 4, Figure 31A As shown, the feedback signals from transmit panel antenna 1 in feedback signal group 3002 of 3100_1 include four feedback signal groups addressed to terminals: feedback signal group 3101_11 addressed to the first terminal, feedback signal group 3101_12 addressed to the second terminal, feedback signal group 3101_13 addressed to the third terminal, and feedback signal group 3101_14 addressed to the fourth terminal. Furthermore, for example, if "the number of time slots in which a terminal can transmit a sector scanning reference signal (the number of terminals that can transmit a sector scanning reference signal) when transmitting a sector scanning reference signal" is Ω, a configuration may be employed in which the feedback signals from transmit panel antenna 1 in feedback signal group 3002 of 3100_1 include Ω feedback signal groups addressed to terminals. Here, Ω is an integer greater than or equal to 1 or an integer greater than or equal to 2.

[0458] In addition, it is described as a "feedback signal group" because it allows the feedback signal for the transmitting panel antenna 1 of 106_1 to exist, the feedback signal for the transmitting panel antenna 2 of 106_2 to exist, the feedback signal for the transmitting panel antenna 3 of 106_3 to exist, and the feedback signal for the transmitting panel antenna 4 of 106_4 to exist.

[0459] exist Figure 31BIn the example, since "when the terminal sends the reference signal for sector scanning, the number of time slots in which the reference signal for sector scanning can be sent (the number of terminals that can send the reference signal for sector scanning)" is 4, Figure 31B As shown, the feedback signals from transmit panel antenna 2 in feedback signal group 3002 of 3100_2 include four feedback signal groups addressed to terminals: feedback signal group 3101_21 addressed to the first terminal, feedback signal group 3101_22 addressed to the second terminal, feedback signal group 3101_23 addressed to the third terminal, and feedback signal group 3101_24 addressed to the fourth terminal. Furthermore, for example, if "the number of time slots in which a terminal can transmit a sector scanning reference signal (the number of terminals that can transmit a sector scanning reference signal) when the terminal transmits a sector scanning reference signal" is Ω, a configuration may be such that the feedback signals from transmit panel antenna 2 in feedback signal group 3002 of 3100_2 include Ω feedback signal groups addressed to terminals. Here, Ω is an integer greater than or equal to 1 or an integer greater than or equal to 2.

[0460] exist Figure 31C In the example, since "when the terminal sends the reference signal for sector scanning, the number of time slots in which the reference signal for sector scanning can be sent (the number of terminals that can send the reference signal for sector scanning)" is 4, Figure 31C As shown, the feedback signals from transmit panel antenna 3 in feedback signal group 3002 of 3100_3 include four feedback signal groups addressed to terminals: feedback signal group 3101_31 addressed to the first terminal, feedback signal group 3101_32 addressed to the second terminal, feedback signal group 3101_33 addressed to the third terminal, and feedback signal group 3101_34 addressed to the fourth terminal. Furthermore, for example, if "the number of time slots in which a terminal can transmit a sector scanning reference signal (the number of terminals that can transmit a sector scanning reference signal) when transmitting a sector scanning reference signal" is Ω, a configuration may be such that the feedback signals from transmit panel antenna 3 in feedback signal group 3002 of 3100_3 include Ω feedback signal groups addressed to terminals. Here, Ω is an integer greater than or equal to 1 or an integer greater than or equal to 2.

[0461] exist Figure 31D In the example, since "when the terminal sends the reference signal for sector scanning, the number of time slots in which the reference signal for sector scanning can be sent (the number of terminals that can send the reference signal for sector scanning)" is 4, Figure 31DAs shown, the feedback signals from transmit panel antenna 4 in feedback signal group 3002 of 3100_4 include four feedback signal groups addressed to terminals: feedback signal group 3101_41 addressed to the first terminal, feedback signal group 3101_42 addressed to the second terminal, feedback signal group 3101_43 addressed to the third terminal, and feedback signal group 3101_44 addressed to the fourth terminal. Furthermore, for example, if "the number of time slots in which a terminal can transmit a sector scanning reference signal (the number of terminals that can transmit a sector scanning reference signal) when the terminal transmits a sector scanning reference signal" is Ω, a configuration may be such that, among the feedback signals from transmit panel antenna 4 in feedback signal group 3002 of 3100_4, Ω number of feedback signal groups addressed to terminals are present. Here, Ω is an integer greater than or equal to 1 or an integer greater than or equal to 2.

[0462] Figure 32A 、 Figure 32B 、 Figure 32C and Figure 32D Shows the Figure 30 An example of the structure of the frame group 3003 containing data symbols transmitted by the base station #1 of 901_1 in the time interval from t4 to t5. Figure 32A 、 Figure 32B 、 Figure 32C and Figure 32D , the horizontal axis is time.

[0463] and, Figure 32A This is a diagram related to the frame of the transmitting panel antenna 1 of 106_1 in the frame group 3003 including data codewords. Figure 32B This is a diagram related to the frame of the transmitting panel antenna 2 of 106_2 in the frame group 3003 containing data codewords. Figure 32C This is a diagram related to the frame of the transmitting panel antenna 3 of 106_3 in the frame group 3003 containing data codewords. Figure 32D This is a diagram related to the frame of the transmitting panel antenna 4 of 106_4 in the frame group 3003 containing data codewords.

[0464] exist Figure 32A In the example, since "when the terminal sends the reference signal for sector scanning, the number of time slots in which the reference signal for sector scanning can be sent (the number of terminals that can send the reference signal for sector scanning)" is 4, Figure 32AAs shown, in the frame group 3003 containing data symbols in 3200_1, which is transmitted by panel antenna 1, there are four modulation signals (time slots) addressed to the terminal: a modulation signal addressed to the first terminal (time slot addressed to the first terminal) 3201_11, a modulation signal addressed to the second terminal (time slot addressed to the second terminal) 3201_12, a modulation signal addressed to the third terminal (time slot addressed to the third terminal) 3201_13, and a modulation signal addressed to the fourth terminal (time slot addressed to the fourth terminal) 3201_14. Furthermore, for example, if "the number of time slots in which a terminal can transmit a sector scanning reference signal (the number of terminals that can transmit a sector scanning reference signal) when the terminal transmits a sector scanning reference signal" is Ω, then the following structure may be employed: in the frame group 3003 containing data symbols in 3200_1, which is transmitted by panel antenna 1, there are Ω groups of modulation signals (time slots) addressed to the terminal. Here, Ω is an integer greater than or equal to 1 or an integer greater than or equal to 2.

[0465] In addition, it is called a "frame group containing data codewords" because it allows the existence of frames containing data codewords for the transmitting panel antenna 1 of 106_1, allows the existence of frames containing data codewords for the transmitting panel antenna 2 of 106_2, allows the existence of frames containing data codewords for the transmitting panel antenna 3 of 106_3, and allows the existence of frames containing data codewords for the transmitting panel antenna 4 of 106_4.

[0466] exist Figure 32B In the example, since "when the terminal sends the reference signal for sector scanning, the number of time slots in which the reference signal for sector scanning can be sent (the number of terminals that can send the reference signal for sector scanning)" is 4, Figure 32B As shown, in the frame group 3003 containing data symbols in 3200_2, which is transmitted by panel antenna 2, there are four modulation signals (time slots) addressed to the terminals: a modulation signal addressed to the first terminal (time slot addressed to the first terminal) 3201_21, a modulation signal addressed to the second terminal (time slot addressed to the second terminal) 3201_22, a modulation signal addressed to the third terminal (time slot addressed to the third terminal) 3201_23, and a modulation signal addressed to the fourth terminal (time slot addressed to the fourth terminal) 3201_24. Furthermore, for example, if "the number of time slots in which a terminal can transmit a sector scanning reference signal (the number of terminals that can transmit a sector scanning reference signal) when the terminal transmits a sector scanning reference signal" is Ω, then a configuration may be such that, in the frame group 3003 containing data symbols in 3200_2, which is transmitted by panel antenna 2, there are Ω groups of modulation signals (time slots) addressed to the terminals. Here, Ω is an integer greater than or equal to 1 or an integer greater than or equal to 2.

[0467] exist Figure 32CIn the example, since "when the terminal sends the reference signal for sector scanning, the number of time slots in which the reference signal for sector scanning can be sent (the number of terminals that can send the reference signal for sector scanning)" is 4, Figure 32C As shown, in the frame group 3003 containing data symbols and transmitted by panel antenna 3, there are four modulation signals (time slots) addressed to the terminals: a modulation signal (time slot addressed to the first terminal) 3201_31 addressed to the first terminal, a modulation signal (time slot addressed to the second terminal) 3201_32 addressed to the second terminal, a modulation signal (time slot addressed to the third terminal) 3201_33 addressed to the third terminal, and a modulation signal (time slot addressed to the fourth terminal) 3201_34 addressed to the fourth terminal. Furthermore, for example, if "the number of time slots in which a terminal can transmit a sector scanning reference signal (the number of terminals that can transmit a sector scanning reference signal) when the terminal transmits a sector scanning reference signal" is Ω, then the following structure may be employed: in the frame group 3003 containing data symbols and transmitted by panel antenna 3, there are Ω groups of modulation signals (time slots) addressed to the terminals. Here, Ω is an integer greater than or equal to 1 or an integer greater than or equal to 2.

[0468] exist Figure 32D In the example, since "when the terminal sends the reference signal for sector scanning, the number of time slots in which the reference signal for sector scanning can be sent (the number of terminals that can send the reference signal for sector scanning)" is 4, Figure 32D As shown, in the frame group 3003 containing data symbols 3200_4, which is transmitted by panel antenna 4, there are four modulation signals (time slots) addressed to the terminals: a modulation signal (time slot addressed to the first terminal) 3201_41 addressed to the first terminal, a modulation signal (time slot addressed to the second terminal) 3201_42 addressed to the second terminal, a modulation signal (time slot addressed to the third terminal) 3201_43 addressed to the third terminal, and a modulation signal (time slot addressed to the fourth terminal) 3201_44 addressed to the fourth terminal. Furthermore, for example, if "the number of time slots in which a terminal can transmit a sector scanning reference signal (the number of terminals that can transmit a sector scanning reference signal) when the terminal transmits a sector scanning reference signal" is Ω, then the following structure may be employed: in the frame group 3003 containing data symbols 3200_4, which is transmitted by panel antenna 4, there are Ω groups of modulation signals (time slots) addressed to the terminals. Here, Ω is an integer greater than or equal to 1 or an integer greater than or equal to 2.

[0469] Figure 33 This is a diagram showing an example of the occupancy of a terminal in the transmission interval of the "sector scanning reference signal" for a terminal according to this embodiment. Figure 33 is with Figure 13The example of terminal occupancy in the time interval from t1 to t2 shown is "the first terminal uses the 'sector scanning reference signal' to send interval 1301_1, the second terminal uses the 'sector scanning reference signal' to send interval 1301_2, the third terminal uses the 'sector scanning reference signal' to send interval 1301_3, and the fourth terminal uses the 'sector scanning reference signal' to send interval 1301_4."

[0470] For example, Figure 33 As shown, terminal #1 of 902_1 transmits sector scanning reference signal 3301_1 during the “sector scanning reference signal” transmission interval of the first terminal of 1301_1. Terminal #2 of 902_2 transmits sector scanning reference signal 3301_2 during the “sector scanning reference signal” transmission interval of the first terminal of 1301_1. Terminal #3 of 902_3 transmits sector scanning reference signal 3301_2 during the “sector scanning reference signal” transmission interval of the first terminal of 1301_1. Sector scanning reference signal 3301_3. Terminal #4 of 2902_4 transmits sector scanning reference signal 3301_4 during the "sector scanning reference signal" transmission interval of the third terminal of 1301_3. Terminal #5 of 2902_5 transmits sector scanning reference signal 3301_5 during the "sector scanning reference signal" transmission interval of the fourth terminal of 1301_4. Terminal #6 of 2902_6 transmits sector scanning reference signal 3301_6.

[0471] Furthermore, the information transmitted by the sector scanning reference signal 3301_1 transmitted by the terminal #1 of 902_1 is the information described in the first and second embodiments.

[0472] The information transmitted by the sector scanning reference signal 3301_2 transmitted by the terminal #2 of 902_2 is the information described in the first embodiment, the second embodiment, etc.

[0473] The information transmitted by the sector scanning reference signal 3301_3 transmitted by the terminal #3 of 902_3 is the information described in the description of the first embodiment, the second embodiment, etc.

[0474] The information transmitted by the sector scanning reference signal 3301_1 transmitted by the terminal #4 of 2902_4 is the information described in the first embodiment, the second embodiment, etc.

[0475] The information transmitted by the sector scanning reference signal 3301_5 transmitted by the terminal #5 of 2902_5 is the information described in the first embodiment, the second embodiment, etc.

[0476] The information transmitted by the sector scanning reference signal 3301_6 transmitted by the terminal #6 of 2902_6 is the information described in the description of Embodiment 1, Embodiment 2, etc.

[0477] The time interval from t1 to t2 is Figure 33 In the example shown, the time interval from t2 to t3 is Figures 34A to 34D Provide explanation.

[0478] In this way, Figure 34A As shown, base station #1 of 901_1 sends "feedback signal of 3401_1 to terminal #1" as "feedback signal of 3101_11 to terminal 1" in "feedback signal of transmitting panel antenna 1 in feedback signal group 3002 of 3100_1".

[0479] In addition, if Figure 34A As shown, base station #1 of 901_1 sends "feedback signal of 3401_4 to terminal #4" as "feedback signal of 3101_13 to terminal 3" in "feedback signal of transmitting panel antenna 1 in feedback signal group 3002 of 3100_1".

[0480] Moreover, if Figure 34B As shown, base station #1 of 901_1 sends "feedback signal of 3401_2 to terminal #2" as "feedback signal of 3101_21 to terminal 1" in "feedback signal of transmitting panel antenna 2 in feedback signal group 3002 of 3100_2".

[0481] In addition, if Figure 34B As shown, base station #1 of 901_1 sends "feedback signal of 3401_5 to terminal #5" as "feedback signal of 3101_24 to terminal 4" in "feedback signal of transmitting panel antenna 2 in feedback signal group 3002 of 3100_2".

[0482] like Figure 34C As shown, base station #1 of 901_1 sends "feedback signal of 3401_3 to terminal #3" as "feedback signal of 3101_31 to terminal 1" in "feedback signal of transmitting panel antenna 3 in feedback signal group 3002 of 3100_3".

[0483] like Figure 34D As shown, base station #1 of 901_1 sends "feedback signal of 3401_6 to terminal #6" as "feedback signal of 3101_42 to the second terminal" in "feedback signal of transmitting panel antenna 4 in feedback signal group 3002 of 3100_4".

[0484] At this point, assuming Figure 34A The "feedback signal from 3401_1 to terminal #1" includes, for example, information that terminal #1 at 902_1 can communicate (with base station #1 at 901_1) using transmitting panel antenna 1 at 106_1.

[0485] In addition, assuming Figure 34A The "feedback signal from 3401_4 to terminal #4" includes, for example, information that terminal #4 at 2902_4 can communicate using the transmitting panel antenna 1 at 106_1 (with the base station #1 at 901_1).

[0486] Assumptions Figure 34B The "feedback signal from 3401_2 to terminal #2" includes, for example, information that terminal #2 at 902_2 can communicate (with base station #1 at 901_1) using transmitting panel antenna 2 at 106_2.

[0487] In addition, assuming Figure 34B The "feedback signal from 3401_5 to terminal #5" includes, for example, information that terminal #5 at 2902_5 can communicate using the transmitting panel antenna 2 at 106_2 (with the base station #1 at 901_1).

[0488] Assumptions Figure 34C The "feedback signal from 3401_3 to terminal #3" includes, for example, information that terminal #3 at 902_3 can communicate using the transmitting panel antenna 3 at 106_3 (with the base station #1 at 901_1).

[0489] Assumptions Figure 34D The "feedback signal from 3401_6 to terminal #6" includes, for example, information that terminal #6 at 2902_6 can communicate using the transmitting panel antenna 4 at 106_4 (with the base station #1 at 901_1).

[0490] In addition, each feedback signal sent to the terminal may also include other information, such as the information described in the first and second embodiments.

[0491] In addition, based on the data sent by terminal #1 at 902_1 Figure 33 The sector scan uses reference signal 3301_1, 901_1 of base station #1 to select the transmitting panel antenna (such as Figure 34A In this way, the transmitting panel antenna 1 is selected, the beamforming parameters are set, and the feedback signal 3401_1 sent to the terminal #1 is sent.

[0492] Based on the data sent by terminal #2 at 902_2 Figure 33 The sector scan uses reference signal 3301_2, and base station #1 of 901_1 selects the transmitting panel antenna (such as Figure 34B In this way, the transmitting panel antenna 2 is selected, the beamforming parameters are set, and the feedback signal 3401_2 is sent to the terminal #2.

[0493] Based on the data sent by terminal #3 at 902_3 Figure 33 The sector scan uses reference signal 3301_3, and base station #1 of 901_1 selects the transmitting panel antenna (such as Figure 34C In this way, the transmitting panel antenna 3 is selected, the beamforming parameters are set, and the feedback signal 3401_3 is sent to the terminal #3.

[0494] Based on the terminal #4 sent by 2902_4 Figure 33 The sector scan uses reference signal 3301_4, and base station #1 of 901_1 selects the transmitting panel antenna (such as Figure 34A In this way, the transmitting panel antenna 1 is selected, the beamforming parameters are set, and the feedback signal 3401_4 is sent to the terminal #4.

[0495] Based on the terminal #5 sent by 2902_5 Figure 33 The sector scan uses reference signal 3301_5, and base station #1 of 901_1 selects the transmitting panel antenna (such as Figure 34B In this way, the transmitting panel antenna 2 is selected, the beamforming parameters are set, and the feedback signal 3401_5 is sent to the terminal #5.

[0496] Based on the terminal #6 sent by 2902_6 Figure 33 The sector scan uses reference signal 3301_6, and base station #1 of 901_1 selects the transmitting panel antenna (such as Figure 34D In this way, the transmitting panel antenna 4 is selected, the beamforming parameters are set, and the feedback signal 3401_6 is sent to the terminal #6.

[0497] Next, the time interval from t2 to t3 is Figures 34A to 34D In the example shown, the time interval from t4 to t5 is Figures 35A to 35D Provide explanation.

[0498] For example, Figure 35AAs shown, the base station #1 of 901_1 transmits the "modulated signal (time slot) sent to terminal #1 of 3501_1" as the "modulated signal (time slot) sent to the first terminal of 3201_11" in the "frame of the transmitting panel antenna 1 in the frame group 3003 containing data code elements of 3200_1". In addition, the "modulated signal (time slot) sent to terminal #1 of 3501_1" contains data sent to terminal #1 of 902_1. In addition, the "modulated signal (time slot) sent to terminal #1 of 3501_1" is sent using the transmitting panel antenna 1. Moreover, the setting method of the transmission method of the "modulated signal (time slot) sent to terminal #1 of 3501_1" is as described in the description of embodiment 1, embodiment 2, etc. For example, as described in the description of embodiment 2, multiple modulated signals (time slots) can also be allocated to one terminal.

[0499] In addition, if Figure 35A As shown, the base station #1 of 901_1 transmits the "modulated signal (time slot) sent to terminal #4 of 3501_4" as the "modulated signal (time slot) sent to the third terminal of 3201_13" in the "frame of the transmitting panel antenna 1 in the frame group 3003 containing data code elements of 3200_1". In addition, the "modulated signal (time slot) sent to terminal #4 of 3501_4" contains data sent to terminal #4 of 2902_4. In addition, the "modulated signal (time slot) sent to terminal #4 of 3501_4" is sent using the transmitting panel antenna 1. Moreover, the setting method of the transmission method of the "modulated signal (time slot) sent to terminal #4 of 3501_4" is as described in the description of embodiment 1, embodiment 2, etc. For example, as described in the description of embodiment 2, multiple modulated signals (time slots) can also be allocated to one terminal.

[0500] like Figure 35B As shown, the base station #1 of 901_1 transmits the "modulated signal (time slot) sent to terminal #2 of 3501_2" as the "modulated signal (time slot) sent to the first terminal of 3201_21" in the "frame of the transmitting panel antenna 2 in the frame group 3003 containing data code elements of 3200_2". In addition, the "modulated signal (time slot) sent to terminal #2 of 3501_2" contains data sent to terminal #2 of 902_2. In addition, the "modulated signal (time slot) sent to terminal #2 of 3501_2" is sent using the transmitting panel antenna 2. Moreover, the setting method of the sending method of the "modulated signal (time slot) sent to terminal #2 of 3501_2" is as described in the description of embodiment 1, embodiment 2, etc. For example, as described in the description of embodiment 2, multiple modulated signals (time slots) can also be allocated to one terminal.

[0501] In addition, if Figure 35BAs shown, the base station #1 of 901_1 transmits the "modulated signal (time slot) sent to terminal #5 of 3501_5" as the "modulated signal (time slot) sent to the 4th terminal of 3201_24" in the "frame of the transmitting panel antenna 2 in the frame group 3003 containing data code elements of 3200_2". In addition, the "modulated signal (time slot) sent to terminal #5 of 3501_5" contains data sent to terminal #5 of 2902_5. In addition, the "modulated signal (time slot) sent to terminal #5 of 3501_5" is sent using the transmitting panel antenna 2. Moreover, the setting method of the sending method of the "modulated signal (time slot) sent to terminal #5 of 3501_5" is as described in the description of Implementation 1, Implementation 2, etc. For example, as described in the description of Implementation 2, multiple modulated signals (time slots) can also be allocated to one terminal.

[0502] like Figure 35C As shown, the base station #1 of 901_1 transmits the "modulated signal (time slot) sent to terminal #3 of 3501_3" as the "modulated signal (time slot) sent to the first terminal of 3201_31" in the "frame of the transmitting panel antenna 3 in the frame group 3003 containing data code elements of 3200_3". In addition, the "modulated signal (time slot) sent to terminal #3 of 3501_3" contains data sent to terminal #3 of 902_3. In addition, the "modulated signal (time slot) sent to terminal #3 of 3501_3" is sent using the transmitting panel antenna 3. Moreover, the setting method of the sending method of the "modulated signal (time slot) sent to terminal #3 of 3501_3" is as described in the description of embodiment 1, embodiment 2, etc. For example, as described in the description of embodiment 2, multiple modulated signals (time slots) can also be allocated to one terminal.

[0503] like Figure 35D As shown, the base station #1 of 901_1 transmits the "modulated signal (time slot) sent to terminal #6 of 3501_6" as the "modulated signal (time slot) sent to the second terminal of 3201_42" in the "frame of the transmitting panel antenna 4 in the frame group 3003 containing data code elements of 3200_4". In addition, the "modulated signal (time slot) sent to terminal #6 of 3501_6" contains data sent to terminal #6 of 2902_6. In addition, the "modulated signal (time slot) sent to terminal #6 of 3501_6" is sent using the transmitting panel antenna 4. Moreover, the setting method of the transmission method of the "modulated signal (time slot) sent to terminal #6 of 3501_6" is as described in the description of embodiment 1, embodiment 2, etc. For example, as described in the description of embodiment 2, multiple modulated signals (time slots) can also be allocated to one terminal.

[0504] In addition, Figure 35AIn addition to data symbols, the "modulated signal (time slot) for terminal #1 in 3501_1" may also include "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 destination terminal (an ID that can identify the terminal), a 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.

[0505] In addition, Figure 35A In addition to data symbols, the "modulated signal (time slot) for terminal #4 in 3501_4" may also include "reference signals such as DMRS, PTRS, and SRS," 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), a 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.

[0506] exist Figure 35B In addition to data symbols, the "modulated signal (time slot) for terminal #2 in 3501_2" may also include "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 destination terminal (an ID that can identify the terminal), a 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.

[0507] In addition, Figure 35B In addition to data symbols, the "modulated signal (time slot) for terminal #5 in 3501_5" may also include "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 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.

[0508] exist Figure 35CIn addition to data symbols, the "modulated signal (time slot) for terminal #3 in 3501_3" may also include "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 destination terminal (an ID that can identify the terminal), a 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.

[0509] exist Figure 35D In addition to data symbols, the "modulated signal (time slot) for terminal #6 in 3501_6" may also include "reference signals such as DMRS, PTRS, and SRS," 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), a 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.

[0510] As described above, base station #1 in 901_1 allocates symbols for the destination terminal to the modulated signals transmitted by the transmit panel antennas, distributing the modulated signals to each transmit panel antenna. This improves data transmission efficiency within the system. Furthermore, by transmitting a reference signal for sector scanning in a manner that reduces the number of collisions, the terminal can improve the communication capacity of the system comprised of the base station and terminals.

[0511] Next, explain Figure 29 The communication status is an example of the communication status shown. Figure 29 The communication status shown in the example of the communication status can be Figure 26 、 Figure 27 The communication status in is the same. Figure 26 、 Figure 27 An example of a communication situation will be described.

[0512] Figure 26 Shown Figure 29 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 2902_4, terminal #5 of 2902_5, and terminal #6 of 2902_6." Figure 26 (A) shows an example of the transmission status of the modulated signal of the base station #1 of 901_1. Figure 26(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 2902_4, Terminal #5 of 2902_5, Terminal #6 of 2902_6". Figure 26 (A) Figure 26 In (B), the horizontal axis is time. Figure 26 In the Figure 18 The same reference numerals are attached to parts that operate in the same manner.

[0513] First, the base station #1 of 901_1 transmits the sector scanning reference signal 1801_1. Figure 30 The description has been given, so the description is omitted.

[0514] Next, the terminals "Terminal #1 of 902_1, Terminal #2 of 902_2, Terminal #3 of 902_3, Terminal #4 of 2902_4, Terminal #5 of 2902_5, Terminal #6 of 2902_6" transmit the sector scanning reference signal 1851_1. Figure 13 、 Figure 14 etc., so the description is omitted.

[0515] Base station #1 of 901_1 sends feedback signal group 2602_1. Figure 31A 、 Figure 31B 、 Figure 31C 、 Figure 31D The description has been given, so the description is omitted.

[0516] Then, the base station #1 of 901_1 transmits "frame group 2603_1 including data symbols". Figure 32A 、 Figure 32B 、 Figure 32C 、 Figure 32D Since the above description has been given, the description thereof will be omitted. (Therefore, "frame 2603_1 including data symbols" is considered to be a frame for downlink, for example.)

[0517] Next, the terminals "Terminal #1 of 902_1, Terminal #2 of 902_2, Terminal #3 of 902_3, Terminal #4 of 2902_4, Terminal #5 of 2902_5, and Terminal #6 of 2902_6" transmit "Frame group 2652_1 containing data symbols." The structure of this frame will be described later. Figure 36 (Thus, the "frame group 2652_1 including data symbols" is considered to be an uplink frame, for example.)

[0518] Next, the base station #1 of 901_1 transmits "frame group 2603_2 including data symbols". In addition, the method of forming "frame group 2603_2 including data symbols" is as follows: Figure 32A 、 Figure 32B 、 Figure 32C 、 Figure 32D Carry out the method described in the description.

[0519] Next, the terminals "Terminal #1 of 902_1, Terminal #2 of 902_2, Terminal #3 of 902_3, Terminal #4 of 2902_4, Terminal #5 of 2902_5, and Terminal #6 of 2902_6" transmit "Frame group 2652_2 containing data symbols." The structure of this frame will be described later. Figure 36 Provide explanation.

[0520] Figure 27 Shown Figure 26 The following is an example of the transmission status of the modulated signal of the base station #1 of 901_1 and the transmission status of the modulated signal of the terminals such as "terminal #1 of 902_1, terminal #2 of 902_2, terminal #3 of 902_3, terminal #4 of 2902_4, terminal #5 of 2902_5, and terminal #6 of 2902_6". Figure 27 In the Figure 18 The same reference numerals are attached to parts that operate in the same manner.

[0521] Figure 27 (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 26 (A) The transmission status of the modulated signal of base station #1 of 901_1.

[0522] Figure 27 (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 2902_4, Terminal #5 of 2902_5, Terminal #6 of 2902_6", which is continuous in time from Figure 26 (B) shows 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 2902_4, terminal #5 of 2902_5, and terminal #6 of 2902_6".

[0523] In addition, Figure 27 (A) Figure 27 In (B), the horizontal axis is time.

[0524] exist Figure 26 (A) Figure 26After (B), the base station #1 of 901_1 transmits "frame group 2603_3 including data symbols". In addition, the method of forming "frame group 2603_2 including data symbols" is as follows: Figure 32A 、 Figure 32B 、 Figure 32C 、 Figure 32D Carry out the method described in the description.

[0525] Next, the terminals "Terminal #1 of 902_1, Terminal #2 of 902_2, Terminal #3 of 902_3, Terminal #4 of 2902_4, Terminal #5 of 2902_5, and Terminal #6 of 2902_6" transmit "Frame group 2652_3 containing data symbols." The structure of this frame will be described later. Figure 36 Provide explanation.

[0526] Next, the base station #1 of 901_1 transmits the sector scanning reference signal 1801_2. Figure 30 The description has been given, so the description is omitted.

[0527] Next, the terminals "Terminal #1 of 902_1, Terminal #2 of 902_2, Terminal #3 of 902_3, Terminal #4 of 2902_4, Terminal #5 of 2902_5, Terminal #6 of 2902_6" transmit the sector scanning reference signal 1851_2. Figure 13 、 Figure 14 etc., so the description is omitted.

[0528] Base station #1 of 901_1 sends feedback signal group 2602_2. Figure 31A 、 Figure 31B 、 Figure 31C 、 Figure 31D The description has been given, so the description is omitted.

[0529] Then, the base station #1 of 901_1 transmits "frame group 2603_4 containing data symbols". Figure 32A 、 Figure 32B 、 Figure 32C 、 Figure 32D The description has been given, so the description is omitted.

[0530] Next, the terminals "Terminal #1 of 902_1, Terminal #2 of 902_2, Terminal #3 of 902_3, Terminal #4 of 2902_4, Terminal #5 of 2902_5, and Terminal #6 of 2902_6" transmit "Frame group 2652_4 containing data symbols." The structure of this frame will be described later. Figure 36 Provide explanation.

[0531] In this way, the base station #1 and the terminal of 901_1 can send a reference signal for sector scanning before "the base station #1 of 901_1 sends a 'frame group containing data codewords', and / or "the terminal #1 of 902_1, the terminal #2 of 902_2, the terminal #3 of 902_3, the terminal #4 of 902_4, the terminal #5 of 2902_5, the terminal #6 of 2902_6, etc. send a 'frame group containing data codewords'". In addition, the base station #1 and the terminal of 901_1 can send a reference signal for sector scanning before "the base station #1 of 901_1 After sending a 'frame group containing data symbols', and / or sending a 'frame group containing data symbols' from terminals #1 (902_1), #2 (902_2), #3 (902_3), #4 (2902_4), #5 (2902_5), and #6 (2902_6), the reference signal for sector scanning is sent again. By selecting the transmit panel antennas to be used and configuring transmit beamforming, the base station and terminals can achieve high data reception quality.

[0532] Next, use Figure 36 The following describes a structural example of a "frame group 2652_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 2902_4, terminal #5 of 2902_5, and terminal #6 of 2902_6". For example, i is set to an integer greater than 1. Figure 36 , the horizontal axis is time.

[0533] like Figure 36 As shown, the "frame group 2652_i including data codewords" is composed of the first time interval, the second time interval, the third time interval, and the fourth time interval.

[0534] For example, terminal #1 at 902_1 transmits frame group 3601_1 (containing data symbols) using the first time interval. Terminal #2 at 902_2 transmits frame group 3601_2 (containing data symbols) using the third time interval. Terminal #3 at 902_3 transmits frame group 3601_3 (containing data symbols) using the first time interval. Terminal #4 at 902_4 transmits frame group 3601_4 (containing data symbols) using the third time interval. Terminal #5 at 902_5 transmits frame group 3601_5 (containing data symbols) using the fourth time interval. Terminal #6 at 902_6 transmits frame group 3601_6 (containing data symbols) using the second time interval.

[0535] In addition, Figure 36For example, although frame group 3601_1 is transmitted by terminal #1 and frame 3601_3 is transmitted by terminal #3 in the first time interval, if the "panel antenna used by the base station 901_1 for communication with terminal #1" and the "panel antenna used by the base station 901_1 for communication with terminal #3" are different, frame group 3601_1 and frame 3601_3 can reduce interference with each other. Furthermore, although frame group 3601_2 is transmitted by terminal #2 and frame 3601_4 is transmitted by terminal #4 in the third time interval, if the "panel antenna used by the base station 901_1 for communication with terminal #2" and the "panel antenna used by the base station 901_1 for communication with terminal #4" are different, frame group 3601_2 and frame 3601_4 can reduce interference with each other.

[0536] In addition, Figure 36 In the embodiment, each terminal can use multiple time intervals to send a modulated signal (time slot), and each terminal can also send multiple modulated signals (time slots) in a certain time interval. This has been described in Embodiment 1, Embodiment 2, etc.

[0537] In this way, for example, by time-dividing the "frame groups 2652_i containing data symbols" transmitted by terminals such as "terminal #1 of 902_1 and terminal #2 of 902_2," each terminal transmits the frame groups, and base station #1 of 901_1 receives the frames transmitted by each terminal. This reduces interference and achieves high data reception quality. Furthermore, by using the panel antenna of base station #1 of 901_1, even when multiple terminals transmit modulated signals (time slots) at the same time, interference between them is minimized.

[0538] In addition, Figure 36 Frame group 3601_1, frame group 3601_2, frame group 3601_3, frame group 3601_4, frame group 3601_5, and frame group 3601_6 may include, in addition to data symbols, "reference signals such as DMRS, PTRS, SRS," pilot symbols, pilot signals, preambles, symbols containing control information, and the like.

[0539] exist Figure 36 In the description, the case where the frame group transmitted by the terminal is time-divided and the space-divided is performed using MU-MIMO is described, but the frame group transmitted by the terminal may also be frequency-divided.

[0540] Figure 37A yes Figure 35A A variation of Figure 37A In the Figure 35A The same reference numerals are attached to parts that operate in the same manner. Figure 37B yes Figure 35B A variation of Figure 37B In the Figure 35B The same reference numerals are attached to parts that operate in the same manner. Figure 37C yes Figure 35C A variation of Figure 37C In the Figure 35C The same reference numerals are attached to parts that operate in the same manner. Figure 37D yes Figure 35D A variation of Figure 37D In the Figure 37D The same reference numerals are attached to parts that operate in the same manner.

[0541] Figure 37A and Figure 35A The difference is that: Figure 35A In the example, the modulated signal (time slot) 3501_1 sent to terminal #1 consists of 1 time slot, and Figure 37A In , the modulated signal (time slot) 3501_1 sent to terminal #1 consists of 2 time slots. Figure 35A There are unassigned empty time slots in Figure 37A In addition, in terms of effectively utilizing empty time slots, Figure 37B 、 Figure 37C 、 Figure 37D Therefore, the use of time slots is not limited to Figure 35A 、 Figure 35B 、 Figure 35C 、 Figure 35D 、 Figure 37A 、 Figure 37B 、 Figure 37C 、 Figure 37D .

[0542] In addition, if we focus on Figure 37A 、 Figure 37B 、 Figure 37C 、 Figure 37D The second time slot of each figure is Figure 37A There is a modulated signal (time slot) 3501_1 sent to terminal #1 in Figure 37B There is a modulated signal (time slot) 3501_2 sent to terminal #2, Figure 37C There is a modulated signal (time slot) 3501_3 sent to terminal #3 in Figure 37D There is a modulated signal (time slot) 3501_6 sent to terminal #6. For example, in Figure 37A 、 Figure 37B 、 Figure 37C 、 Figure 37DIn the second time slot of each diagram, a modulation signal (time slot) may be sent to a different destination for each panel antenna. In this case, the four panel antennas may or may not use the same frequency (same frequency band).

[0543] Furthermore, when the same frequency (same frequency band) is used, it can be considered that MU-MIMO transmission is being used. For example, when the directivity differs between panel antennas, the following effect can be achieved: even when MU-MIMO is used, interference can be reduced. (The relevant transmission method has also been described in Embodiment 2.)

[0544] In addition, it may also be the case that when the base station #1 of 901_1 sends a modulation signal according to the panel antenna, for example, the modulation signal sent using the panel antenna 1 and the modulation signal sent using the panel antenna 2 exist in the same time interval, and the frequency (frequency band) of the modulation signal sent using the panel antenna 1 is the same as or partially the same as the frequency (frequency band) of the modulation signal sent using the panel antenna 2.

[0545] For example, when a modulated signal is transmitted from each panel antenna, the following examples 3-1, 3-2, and 3-3 can be considered.

[0546] Example 3-1:

[0547] Base station #1 of 901_1 has multiple panel antennas. When modulated signals are transmitted from each panel antenna, a set of modulated signals with the same or partially the same frequency (band) may exist in a certain time interval.

[0548] As another method, the frequency (band) of the modulated signal transmitted by the base station #1 of 901_1 using the panel antenna 1 and the frequency (band) of the modulated signal transmitted by the panel antenna 2 may be different.

[0549] Example 3-2:

[0550] The base station #1 of 901_1 has multiple panel antennas. When modulated signals are transmitted from each panel antenna, there may be a set of modulated signals with different frequencies (frequency bands).

[0551] Moreover, it is also possible that the frequency (band) of the modulated signal sent by base station #1 of 901_1 using panel antenna 1 is the same as the frequency (band) of the modulated signal sent using panel antenna 2, and these two modulated signals are time-division multiplexed.

[0552] Example 3-3:

[0553] Base station #1 of 901_1 has multiple panel antennas. When modulated signals are transmitted from each panel antenna, there may be a set of modulated signals having the same frequency (frequency band) and being time-division multiplexed.

[0554] In addition, for example, the base station #1 at 901_1 is Figure 1A 、 Figure 1B 、 Figure 1C In a configuration such as , a modulated signal can be generated based on control signal 100, such that "the 3-1st instance exists," and / or "the 3-2nd instance exists," and / or "the 3-3rd instance exists," and this modulated signal can be transmitted from the panel antenna. However, while control signal 100 is output from the third processing unit, this configuration is not limiting. For example, control signal 100 can be another internal output or an external signal.

[0555] As described in the present embodiment, the terminal transmits a reference signal for sector scanning in a manner that reduces the number of collisions, thereby achieving the following effect: improving the communication capacity of a system composed of a base station and a 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 or multiple transmission directivities and reception directivities of antennas is sufficient. In addition, although signals and frames exist in each figure, the names are not limited to these. What is important is the function of the transmitted signal itself.

[0556] (Implementation 4)

[0557] In this embodiment, examples of the structures of modulation signals, frames, and frame groups, etc., applicable to the examples of Embodiments 1, 2, 3, and the later-described Embodiment 5, are described. In addition, the following description may sometimes refer to the figures shown in Embodiments 1, 2, and 3. In such cases, the description of some of the figures shown in Embodiments 1, 2, and 3 may be omitted.

[0558] For example, in this embodiment, the description of "base station and terminal as Figure 18 and Figure 19 ", or "the base station and the terminal are like Figure 26 and Figure 27 "An example of the structure of a modulation signal, frame, frame group, etc. when communicating in this way.

[0559] For example, in the first embodiment, it is described that "the base station and the terminal are Figure 18 and Figure 19 When communicating in this manner, the base station and the terminal use sector scanning reference signal 1801_1, sector scanning reference signal 1851_1, and feedback signal 1802_1 to select a panel antenna, and use sector scanning reference signal 1801_2, sector scanning reference signal 1851_2, and feedback signal 1802_2 to select the next panel antenna.

[0560] In addition, in Embodiment 2 and Embodiment 3, it is described that "the base station and the terminal are Figure 26 and Figure 27 When communicating in this manner, the base station and the terminal use sector scanning reference signal 1801_1, sector scanning reference signal 1851_1, and feedback signal group 2602_1 to select a panel antenna, and use sector scanning reference signal 1801_2, sector scanning reference signal 1851_2, and feedback signal group 2602_2 to select the next panel antenna.

[0561] The following describes the Figure 18 、 Figure 19 Frames 1803_1, 1803_2, 1803_3, 1803_4, etc. containing data symbols, and frames 1852_1, 1852_2, 1852_3, 1852_4, etc. containing data symbols, " Figure 26 Frame groups 2603_1, 2603_2, 2603_3, 2603_4, etc., containing data symbols, and frame groups 2652_1, 2652_2, 2652_3, 2652_4, etc., containing data symbols, are used to change the beamforming parameter settings. Furthermore, the panel antenna is not changed for these frames and frame groups.

[0562] Figure 38 Shown Figure 17 、 Figure 25 、 Figure 32A 、 Figure 32B 、 Figure 32C 、 Figure 32D 、 Figure 35A 、 Figure 35B 、 Figure 35C 、 Figure 35D 、 Figure 37A 、 Figure 37B 、 Figure 37C 、 Figure 37D An example of the structure of a "modulated signal (time slot) for the i-th terminal" 3800 transmitted by the base station in . Here, i is an integer greater than or equal to 1.

[0563] like Figure 38As shown, the “modulated signal (time slot) sent to the i-th terminal” 3800 is composed of, for example, a first reference codeword (first reference signal) 3801, a control information codeword 3802, a data codeword 3803, and a second reference codeword (second reference signal) 3804.

[0564] First reference symbol 3801 is a symbol used to demodulate data symbol 3803, and is used, for example, for channel estimation, frequency offset estimation, phase distortion (phase noise) estimation, signal detection, etc. First reference symbol 3801 may also be, for example, a DMRS.

[0565] Control information symbol 3802 is assumed to include at least information related to data symbol 3803. Control information symbol 3802 is assumed to include, for example, information on the transmission method used to transmit data symbol 3803, information on the modulation scheme, information on the error correction coding scheme, and the like.

[0566] In this case, the control information symbol 3802 may also include information on beamforming parameters used by the base station (which may also be parameters used later). In addition, the control information symbol 3802 may also include information indicating whether the base station has changed the beamforming parameters.

[0567] Data symbol 3803 is a symbol used to transmit data.

[0568] The second reference symbol 3804 is a symbol for the terminal to estimate the state of the modulated signal sent by the base station. The terminal uses this symbol to estimate the appropriate parameters of the base station's beamforming and the appropriate parameters of the terminal's beamforming. In addition, the information estimated here can also be fed back to the base station. (For example, the information estimated here can also be included in the following Figure 39A 、 Figure 39B ) In addition, in order to search for appropriate directivity, the second reference symbol 3804 may also change directivity per symbol or per multiple symbols.

[0569] Figure 39A Shown Figure 20 、 Figure 28 、 Figure 36 An example of the structure of a "frame or frame group" 3900 sent by a terminal in.

[0570] like Figure 39A As shown, a “frame or frame group” 3900 is composed of, for example, a third reference symbol (third reference signal) 3901 , a control information symbol 3902 , a data symbol 3903 , and a fourth reference symbol (second reference signal) 3904 .

[0571] Third reference symbol 3901 is a symbol used to demodulate data symbol 3903, and is used, for example, for channel estimation, frequency offset estimation, phase distortion (phase noise) estimation, signal detection, etc. Third reference symbol 3901 may also be, for example, a DMRS.

[0572] Control information symbol 3902 is assumed to include at least information related to data symbol 3903. Control information symbol 3902 is assumed to include, for example, information on the transmission method used to transmit data symbol 3903, information on the modulation scheme, and information on the error correction coding scheme.

[0573] In this case, the control information symbol 3902 may also include information on beamforming parameters used by the terminal (which may also be parameters used later). In addition, the control information symbol 3902 may also include information indicating whether the terminal has changed the beamforming parameters.

[0574] Data symbol 3903 is a symbol used to transmit data.

[0575] The fourth reference symbol 3904 is a symbol used by the base station to estimate the state of the modulated signal sent by the terminal. The base station uses this symbol to estimate the appropriate parameters for the terminal's beamforming and the appropriate parameters for the base station's beamforming. In addition, the information estimated here can also be fed back to the terminal. (For example, the information estimated here can also be included in Figure 38 ) In addition, in order to search for appropriate directivity, the fourth reference symbol 3904 may also change directivity per symbol or per multiple symbols.

[0576] Figure 39B Shown Figure 20 、 Figure 28 、 Figure 36 The "frame or frame group" 3900 sent by the terminal in Figure 39A Different structural examples.

[0577] Figure 39B and Figure 39A The difference is that there is no fourth reference symbol 3904. In this case, the base station and the terminal do not perform the operations using the fourth reference symbol 3904 described above.

[0578] As described above, by changing the parameters for directivity control more than once after selecting an antenna in the base station or terminal, that is, by updating the parameters for directivity control more frequently than the frequency of antenna selection, the quality of data reception can be improved, thereby achieving the effect of improving data transmission efficiency in the system.

[0579] also, Figure 38 、 Figure 39A 、 Figure 39B The structure of is only an example, and the construction method is not limited to this. Figure 38 、 Figure 39A 、 Figure 39B In addition, each symbol may contain other symbols. In addition, the order of configuration of symbols is not limited to Figure 38 、 Figure 39A 、 Figure 39B example.

[0580] In addition, in "Base Station and Terminal Figure 18 and Figure 19 ", or "the base station and the terminal are like Figure 26 and Figure 27 "When communicating in this way, the frequency of the modulation signal sent by the base station and the frequency sent by the terminal can be the same, or partially the same. They can also be different. However, this is not limited to the example described. Moreover, the timing of the base station sending the modulation signal and the timing of the terminal sending the modulation signal are not limited to " Figure 18 and Figure 19 Examples (Time Division Multiplexing (TDM), Time Division Duplex (TDD))", Figure 26 and Figure 27 Examples (TDM, TDD)". For example, it can also be a method other than "TDM, TDD".

[0581] (Implementation 5)

[0582] In this embodiment, a modified example of embodiment 3 is described. In the following, the following description may be made with reference to a figure shown in any one of embodiments 1, 2, 3, and 4. In such cases, the description of a portion of the figure shown in any one of embodiments 1, 2, 3, and 4 may be omitted.

[0583] Figure 40 An example of the communication state in this embodiment is shown. Figure 40 In the Figure 9 、 Figure 29 The same reference numerals are attached to parts that operate in the same manner.

[0584] exist Figure 40In this example, 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 2902_4, terminal #5 at 2902_5, and terminal #6 at 2902_6. This is as described in Embodiment 3. The communication process and method have already been explained in that embodiment, so their description is omitted.

[0585] exist Figure 40 In the example, base station #2 of 4001_2 also exists, and base station #2 of 4001_2 communicates with terminal #1 of 902_1, terminal #2 of 902_2, and terminal #3 of 902_3. The following describes the operation in detail.

[0586] Furthermore, the structure of base station #2 in 4001_2 can be the same as that of base station #1 in 901_1. For example, base station #2 in 4001_2 can include four transmit panel antennas: transmit panel antenna 1 in 106_1, transmit panel antenna 2 in 106_2, transmit panel antenna 3 in 106_3, and transmit panel antenna 4 in 106_4. Alternatively, base station #2 in 4001_2 can include "one or more transmit antennas or transmit panel antennas."

[0587] Figure 30 Shown Figure 40 An example of a modulated signal 3000 transmitted by base station #2 of 4001_2. Figure 10 The same reference numerals are assigned to parts that operate in the same manner, and description thereof will be omitted.

[0588] In the time interval from time t0 to time t1, a sector scanning reference signal 1001 exists.

[0589] The time interval from time t1 to time t2 is the response interval of the terminal.

[0590] In the time interval from time t2 to time t3, there is a feedback signal group 3002. In addition, the feedback signal group 3002 will be described later.

[0591] In the time interval from time t4 to time t5, there is a frame group 3003 including data symbols. Frame group 3003 including data symbols will be described later.

[0592] Figure 11 Shown Figure 40 The 4001_2 base station #2 sends Figure 30 An example of a sector scanning reference signal 1001. Figure 11 The operation has been described, so the description is omitted.

[0593] 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.

[0594] Figure 13 The example of the operation of the terminal response interval, that is, the time interval from time t1 to time t2, is shown. Figure 13 The operation has been described, so the description is omitted.

[0595] Figure 14 Shown with Figure 13 The example of the terminal occupancy is shown as follows: "The first terminal transmits the 'sector scan reference signal' interval 1301_1, the second terminal transmits the 'sector scan reference signal' interval 1301_2, the third terminal transmits the 'sector scan reference signal' interval 1301_3, and the fourth terminal transmits the 'sector scan reference signal' interval 1301_4". In addition, in the first embodiment and the second embodiment, the Figure 14 The operation has been described, so the description is omitted.

[0596] Figure 15 Shown Figure 11 The structure example of "sector scanning reference signal 1101_xi in the transmission panel antenna xi". Figure 15 The operation has been described, so the description is omitted.

[0597] Figure 31A 、 Figure 31B 、 Figure 31C and Figure 31D Shows the Figure 30 An example of the structure of the feedback signal group 3002 sent by the base station #2 of 4001_2 in the time interval from t2 to t3. Figure 31A 、 Figure 31B 、 Figure 31C and Figure 31D In the example, the horizontal axis represents time. To simplify the description, it is assumed that base station #2 of 4001_2 includes four transmission panel antennas: transmission panel antenna 1 of 106_1, transmission panel antenna 2 of 106_2, transmission panel antenna 3 of 106_3, and transmission panel antenna 4 of 106_4.

[0598] and, Figure 31A This is a diagram related to the feedback signal of the transmitting panel antenna 1 of 106_1 in the feedback signal group 3002. Figure 31B This is a diagram related to the feedback signal of the transmitting panel antenna 2 of 106_2 in the feedback signal group 3002. Figure 31CThis is a diagram related to the feedback signal of the transmitting panel antenna 3 of 106_3 in the feedback signal group 3002. Figure 31D This is a diagram related to the feedback signal of the transmitting panel antenna 4 of 106_4 in the feedback signal group 3002.

[0599] exist Figure 31A In the example, since "when the terminal sends the reference signal for sector scanning, the number of time slots in which the reference signal for sector scanning can be sent (the number of terminals that can send the reference signal for sector scanning)" is 4, Figure 31A As shown, the feedback signals from transmit panel antenna 1 in feedback signal group 3002 of 3100_1 include four feedback signal groups addressed to terminals: feedback signal group 3101_11 addressed to the first terminal, feedback signal group 3101_12 addressed to the second terminal, feedback signal group 3101_13 addressed to the third terminal, and feedback signal group 3101_14 addressed to the fourth terminal. Furthermore, for example, if "the number of time slots in which a terminal can transmit a sector scanning reference signal (the number of terminals that can transmit a sector scanning reference signal) when transmitting a sector scanning reference signal" is Ω, a configuration may be employed in which the feedback signals from transmit panel antenna 1 in feedback signal group 3002 of 3100_1 include Ω feedback signal groups addressed to terminals. Here, Ω is an integer greater than or equal to 1 or an integer greater than or equal to 2.

[0600] In addition, it is described as a "feedback signal group" because it allows the feedback signal for the transmitting panel antenna 1 of 106_1 to exist, the feedback signal for the transmitting panel antenna 2 of 106_2 to exist, the feedback signal for the transmitting panel antenna 3 of 106_3 to exist, and the feedback signal for the transmitting panel antenna 4 of 106_4 to exist.

[0601] exist Figure 31B In the example, since "when the terminal sends the reference signal for sector scanning, the number of time slots in which the reference signal for sector scanning can be sent (the number of terminals that can send the reference signal for sector scanning)" is 4, Figure 31BAs shown, the feedback signals from transmit panel antenna 2 in feedback signal group 3002 of 3100_2 include four feedback signal groups addressed to terminals: feedback signal group 3101_21 addressed to the first terminal, feedback signal group 3101_22 addressed to the second terminal, feedback signal group 3101_23 addressed to the third terminal, and feedback signal group 3101_24 addressed to the fourth terminal. Furthermore, for example, if "the number of time slots in which a terminal can transmit a sector scanning reference signal (the number of terminals that can transmit a sector scanning reference signal) when the terminal transmits a sector scanning reference signal" is Ω, a configuration may be such that the feedback signals from transmit panel antenna 2 in feedback signal group 3002 of 3100_2 include Ω feedback signal groups addressed to terminals. Here, Ω is an integer greater than or equal to 1 or an integer greater than or equal to 2.

[0602] exist Figure 31C In the example, since "when the terminal sends the reference signal for sector scanning, the number of time slots in which the reference signal for sector scanning can be sent (the number of terminals that can send the reference signal for sector scanning)" is 4, Figure 31C As shown, the feedback signals from transmit panel antenna 3 in feedback signal group 3002 of 3100_3 include four feedback signal groups addressed to terminals: feedback signal group 3101_31 addressed to the first terminal, feedback signal group 3101_32 addressed to the second terminal, feedback signal group 3101_33 addressed to the third terminal, and feedback signal group 3101_34 addressed to the fourth terminal. Furthermore, for example, if "the number of time slots in which a terminal can transmit a sector scanning reference signal (the number of terminals that can transmit a sector scanning reference signal) when transmitting a sector scanning reference signal" is Ω, a configuration may be such that the feedback signals from transmit panel antenna 3 in feedback signal group 3002 of 3100_3 include Ω feedback signal groups addressed to terminals. Here, Ω is an integer greater than or equal to 1 or an integer greater than or equal to 2.

[0603] exist Figure 31D In the example, since "when the terminal sends the reference signal for sector scanning, the number of time slots in which the reference signal for sector scanning can be sent (the number of terminals that can send the reference signal for sector scanning)" is 4, Figure 31DAs shown, the feedback signals from transmit panel antenna 4 in feedback signal group 3002 of 3100_4 include four feedback signal groups addressed to terminals: feedback signal group 3101_41 addressed to the first terminal, feedback signal group 3101_42 addressed to the second terminal, feedback signal group 3101_43 addressed to the third terminal, and feedback signal group 3101_44 addressed to the fourth terminal. Furthermore, for example, if "the number of time slots in which a terminal can transmit a sector scanning reference signal (the number of terminals that can transmit a sector scanning reference signal) when the terminal transmits a sector scanning reference signal" is Ω, a configuration may be such that, among the feedback signals from transmit panel antenna 4 in feedback signal group 3002 of 3100_4, Ω number of feedback signal groups addressed to terminals are present. Here, Ω is an integer greater than or equal to 1 or an integer greater than or equal to 2.

[0604] Figure 32A 、 Figure 32B 、 Figure 32C and Figure 32D Shows the Figure 30 An example of the structure of the frame group 3003 containing data symbols transmitted by the base station #2 of 4001_2 in the time interval from t4 to t5. Figure 32A 、 Figure 32B 、 Figure 32C and Figure 32D , the horizontal axis is time.

[0605] and, Figure 32A This is a diagram related to the frame of the transmitting panel antenna 1 of 106_1 in the frame group 3003 including data codewords. Figure 32B This is a diagram related to the frame of the transmitting panel antenna 2 of 106_2 in the frame group 3003 containing data codewords. Figure 32C This is a diagram related to the frame of the transmitting panel antenna 3 of 106_3 in the frame group 3003 containing data codewords. Figure 32D This is a diagram related to the frame of the transmitting panel antenna 4 of 106_4 in the frame group 3003 containing data codewords.

[0606] exist Figure 32A In the example, since "when the terminal sends the reference signal for sector scanning, the number of time slots in which the reference signal for sector scanning can be sent (the number of terminals that can send the reference signal for sector scanning)" is 4, Figure 32AAs shown, in the frame group 3003 containing data symbols in 3200_1, which is transmitted by panel antenna 1, there are four modulation signals (time slots) addressed to the terminal: a modulation signal addressed to the first terminal (time slot addressed to the first terminal) 3201_11, a modulation signal addressed to the second terminal (time slot addressed to the second terminal) 3201_12, a modulation signal addressed to the third terminal (time slot addressed to the third terminal) 3201_13, and a modulation signal addressed to the fourth terminal (time slot addressed to the fourth terminal) 3201_14. Furthermore, for example, if "the number of time slots in which a terminal can transmit a sector scanning reference signal (the number of terminals that can transmit a sector scanning reference signal) when the terminal transmits a sector scanning reference signal" is Ω, then the following structure may be employed: in the frame group 3003 containing data symbols in 3200_1, which is transmitted by panel antenna 1, there are Ω groups of modulation signals (time slots) addressed to the terminal. Here, Ω is an integer greater than or equal to 1 or an integer greater than or equal to 2.

[0607] In addition, it is called a "frame group containing data codewords" because it allows the existence of frames containing data codewords for the transmitting panel antenna 1 of 106_1, allows the existence of frames containing data codewords for the transmitting panel antenna 2 of 106_2, allows the existence of frames containing data codewords for the transmitting panel antenna 3 of 106_3, and allows the existence of frames containing data codewords for the transmitting panel antenna 4 of 106_4.

[0608] exist Figure 32B In the example, since "when the terminal sends the reference signal for sector scanning, the number of time slots in which the reference signal for sector scanning can be sent (the number of terminals that can send the reference signal for sector scanning)" is 4, Figure 32B As shown, in the frame group 3003 containing data symbols in 3200_2, which is transmitted by panel antenna 2, there are four modulation signals (time slots) addressed to the terminals: a modulation signal addressed to the first terminal (time slot addressed to the first terminal) 3201_21, a modulation signal addressed to the second terminal (time slot addressed to the second terminal) 3201_22, a modulation signal addressed to the third terminal (time slot addressed to the third terminal) 3201_23, and a modulation signal addressed to the fourth terminal (time slot addressed to the fourth terminal) 3201_24. Furthermore, for example, if "the number of time slots in which a terminal can transmit a sector scanning reference signal (the number of terminals that can transmit a sector scanning reference signal) when the terminal transmits a sector scanning reference signal" is Ω, then a configuration may be such that, in the frame group 3003 containing data symbols in 3200_2, which is transmitted by panel antenna 2, there are Ω groups of modulation signals (time slots) addressed to the terminals. Here, Ω is an integer greater than or equal to 1 or an integer greater than or equal to 2.

[0609] exist Figure 32CIn the example, since "when the terminal sends the reference signal for sector scanning, the number of time slots in which the reference signal for sector scanning can be sent (the number of terminals that can send the reference signal for sector scanning)" is 4, Figure 32C As shown, in the frame group 3003 containing data symbols and transmitted by panel antenna 3, there are four modulation signals (time slots) addressed to the terminals: a modulation signal (time slot addressed to the first terminal) 3201_31 addressed to the first terminal, a modulation signal (time slot addressed to the second terminal) 3201_32 addressed to the second terminal, a modulation signal (time slot addressed to the third terminal) 3201_33 addressed to the third terminal, and a modulation signal (time slot addressed to the fourth terminal) 3201_34 addressed to the fourth terminal. Furthermore, for example, if "the number of time slots in which a terminal can transmit a sector scanning reference signal (the number of terminals that can transmit a sector scanning reference signal) when the terminal transmits a sector scanning reference signal" is Ω, then the following structure may be employed: in the frame group 3003 containing data symbols and transmitted by panel antenna 3, there are Ω groups of modulation signals (time slots) addressed to the terminals. Here, Ω is an integer greater than or equal to 1 or an integer greater than or equal to 2.

[0610] exist Figure 32D In the example, since "when the terminal sends the reference signal for sector scanning, the number of time slots in which the reference signal for sector scanning can be sent (the number of terminals that can send the reference signal for sector scanning)" is 4, Figure 32D As shown, in the frame group 3003 containing data symbols 3200_4, which is transmitted by panel antenna 4, there are four modulation signals (time slots) addressed to the terminals: a modulation signal (time slot addressed to the first terminal) 3201_41 addressed to the first terminal, a modulation signal (time slot addressed to the second terminal) 3201_42 addressed to the second terminal, a modulation signal (time slot addressed to the third terminal) 3201_43 addressed to the third terminal, and a modulation signal (time slot addressed to the fourth terminal) 3201_44 addressed to the fourth terminal. Furthermore, for example, if "the number of time slots in which a terminal can transmit a sector scanning reference signal (the number of terminals that can transmit a sector scanning reference signal) when the terminal transmits a sector scanning reference signal" is Ω, then the following structure may be employed: in the frame group 3003 containing data symbols 3200_4, which is transmitted by panel antenna 4, there are Ω groups of modulation signals (time slots) addressed to the terminals. Here, Ω is an integer greater than or equal to 1 or an integer greater than or equal to 2.

[0611] Figure 41 This is a diagram showing an example of the occupancy of a terminal in the transmission interval of the "sector scanning reference signal" for a terminal according to this embodiment. Figure 41 is with Figure 13The example of terminal occupancy in the time interval from t1 to t2 shown is "the first terminal uses the 'sector scanning reference signal' to send interval 1301_1, the second terminal uses the 'sector scanning reference signal' to send interval 1301_2, the third terminal uses the 'sector scanning reference signal' to send interval 1301_3, and the fourth terminal uses the 'sector scanning reference signal' to send interval 1301_4."

[0612] For example, Figure 41 As shown, terminal #1 of 902_1 sends reference signal 4101_1 for sector scanning during the interval in which the 4th terminal of 1301_4 sends the “reference signal for sector scanning”. Terminal #2 of 902_2 sends reference signal 4101_2 for sector scanning during the interval in which the 1st terminal of 1301_1 sends the “reference signal for sector scanning”. Terminal #3 of 902_3 sends reference signal 4101_3 for sector scanning during the interval in which the 3rd terminal of 1301_3 sends the “reference signal for sector scanning”.

[0613] Furthermore, the information transmitted by the sector scanning reference signal 4101_1 transmitted by the terminal #1 of 902_1 is the information described in the first and second embodiments.

[0614] The information transmitted by the sector scanning reference signal 4101_2 transmitted by the terminal #2 of 902_2 is the information described in the first embodiment, the second embodiment, etc.

[0615] The information transmitted by the sector scanning reference signal 4101_3 transmitted by the terminal #3 of 902_3 is the information described in the description of the first embodiment, the second embodiment, etc.

[0616] The time interval from t1 to t2 is Figure 41 In the example shown, the time interval from t2 to t3 is Figures 42A to 42D Provide explanation.

[0617] In this way, Figure 42A As shown, base station #2 of 4001_2 sends "feedback signal of 4201_2 to terminal #2" as "feedback signal of 3101_11 to terminal 1" in "feedback signal of transmitting panel antenna 1 in feedback signal group 3002 of 3100_1".

[0618] Moreover, if Figure 42B As shown, base station #2 of 4001_2 sends "feedback signal of 4201_3 to terminal #3" as "feedback signal of 3101_23 to the third terminal" in "feedback signal of transmitting panel antenna 2 in feedback signal group 3002 of 3100_2".

[0619] like Figure 42C As shown, base station #2 of 4001_2 sends "feedback signal of 4201_1 to terminal #1" as "feedback signal of 3101_34 to the 4th terminal" in "feedback signal of transmitting panel antenna 3 in feedback signal group 3002 of 3100_3".

[0620] like Figure 42D As shown, base station #2 of 4001_2 does not allocate the "feedback signal of transmitting panel antenna 4 in feedback signal group 3002 of 3100_4", so, for example, base station #2 of 4001_2 will not send a signal from panel antenna 4.

[0621] At this point, assuming Figure 42A The "feedback signal from 4201_2 to terminal #2" includes, for example, information that terminal #2 at 902_2 can communicate (with base station #2 at 4001_2) using the transmitting panel antenna 1 at 106_1.

[0622] Assumptions Figure 42B The "feedback signal from 4201_3 to terminal #3" includes, for example, information that terminal #3 at 902_3 can communicate using the transmitting panel antenna 2 at 106_2 (with the base station #2 at 4001_2).

[0623] Assumptions Figure 42C The "feedback signal from 4201_1 to terminal #1" includes, for example, information that terminal #1 at 902_1 can communicate (with base station #2 at 4001_2) using the transmitting panel antenna 3 at 106_3.

[0624] In addition, each feedback signal sent to the terminal may also include other information, such as the information described in the first and second embodiments.

[0625] In addition, based on the data sent by terminal #1 at 902_1 Figure 41 The sector scan uses reference signals 4101_1, 4001_2 and base station #2 selects the transmitting panel antenna (such as Figure 42C In this way, the transmitting panel antenna 3 is selected, the beamforming parameters are set, and the feedback signal 4201_1 is sent to the terminal #1.

[0626] Based on the data sent by terminal #2 at 902_2 Figure 41 The sector scan uses reference signal 4101_2, and base station #2 of 4001_2 selects the transmitting panel antenna (such as Figure 42A In this way, the transmitting panel antenna 1 is selected, the beamforming parameters are set, and the feedback signal 4201_2 is sent to the terminal #2.

[0627] Based on the data sent by terminal #3 at 902_3 Figure 41 The sector scan uses reference signal 4101_3, and base station #2 of 4001_2 selects the transmitting panel antenna (such as Figure 42B In this way, the transmitting panel antenna 2 is selected, the beamforming parameters are set, and the feedback signal 4201_3 is sent to the terminal #3.

[0628] Next, the time interval from t2 to t3 is Figures 42A to 42D In the example shown, the time interval from t4 to t5 is Figures 43A to 43D Provide explanation.

[0629] For example, Figure 43A As shown, the base station #2 of 4001_2 transmits the "modulated signal (time slot) of 4301_2 to terminal #2" as the "modulated signal (time slot) of 3201_11 to terminal #1" in the "frame of the transmitting panel antenna 1 in the frame group 3003 containing data code elements of 3200_1". In addition, the "modulated signal (time slot) of 4301_2 to terminal #2" contains data to terminal #2 of 902_2. In addition, the "modulated signal (time slot) of 4301_2 to terminal #2" is transmitted using the transmitting panel antenna 1. Moreover, the setting method of the transmission method of the "modulated signal (time slot) of 4301_2 to terminal #2" is as described in the description of Implementation 1, Implementation 2, etc. For example, as described in Implementation 2, multiple modulated signals (time slots) may be allocated to one terminal.

[0630] like Figure 43B As shown, the base station #2 of 4001_2 transmits the "modulated signal (time slot) sent to terminal #3 of 4301_3" as the "modulated signal (time slot) sent to the third terminal of 3201_23" in the "frame of the transmitting panel antenna 2 in the frame group 3003 containing data code elements of 3200_2". In addition, the "modulated signal (time slot) sent to terminal #3 of 4301_3" contains data sent to terminal #3 of 902_3. In addition, the "modulated signal (time slot) sent to terminal #3 of 4301_3" is sent using the transmitting panel antenna 2. Moreover, the setting method of the transmission method of the "modulated signal (time slot) sent to terminal #3 of 4301_3" is as described in the description of embodiment 1, embodiment 2, etc. For example, as described in the description of embodiment 2, multiple modulated signals (time slots) can also be allocated to one terminal.

[0631] like Figure 43CAs shown, the base station #2 of 4001_2 transmits the "modulated signal (time slot) sent to terminal #1 of 4301_1" as the "modulated signal (time slot) sent to the 4th terminal of 3201_34" in the "frame of the transmitting panel antenna 3 in the frame group 3003 containing data code elements of 3200_3". In addition, the "modulated signal (time slot) sent to terminal #1 of 4301_1" contains data sent to terminal #1 of 902_1. In addition, the "modulated signal (time slot) sent to terminal #1 of 4301_1" is sent using the transmitting panel antenna 3. Moreover, the setting method of the transmission method of the "modulated signal (time slot) sent to terminal #1 of 4301_1" is as described in the description of embodiment 1, embodiment 2, etc. For example, as described in the description of embodiment 2, multiple modulated signals (time slots) can also be allocated to one terminal.

[0632] like Figure 43D As shown, the modulation signal (time slot) is not allocated to the "frame of the transmission panel antenna 4 in the frame group 3003 containing data codewords of 3200_4", so the base station #2 of 4001_2 does not transmit the modulation signal (time slot).

[0633] In addition, Figure 43A In addition to data symbols, the "modulated signal (time slot) for terminal #2 in 4301_2" may also include "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 destination terminal (an ID that can identify the terminal), a 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.

[0634] exist Figure 43B In addition to data symbols, the "modulated signal (time slot) for terminal #3 in 4301_3" may also include "reference signals such as DMRS, PTRS, and SRS," 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 transmission method of 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.

[0635] exist Figure 43CIn addition to data symbols, the "modulated signal (time slot) for terminal #1 of 4301_1" may also include "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 destination terminal (an ID that can identify the terminal), the transmission method of 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.

[0636] As described above, base station #2 in 4001_2 allocates symbols for the destination terminal to the modulated signals transmitted by the transmit panel antennas, distributing the modulated signals to each transmit panel antenna. This improves data transmission efficiency within the system. Furthermore, by transmitting a reference signal for sector scanning in a manner that reduces the number of collisions, the terminal can improve the communication capacity of the system comprised of the base station and terminals.

[0637] and, Figure 40 The terminal #1 of 902_1, the terminal #2 of 902_2, and the terminal #3 of 902_3 can communicate as described below. " is used to identify the panel antenna (transmitting panel antenna) of each terminal. For example, " "m" in " indicates the panel antenna of terminal #m, and "n" is a number used to identify the panel antenna. For example, It can represent the panel antenna 1 of terminal #1, It can represent the panel antenna 2 of terminal #1. In addition, for example, and They can represent the panel antenna 1 of terminal #2 and the panel antenna 3 of terminal #2 respectively. In addition, for example, and They may be panel antenna 2 included in terminal #3 and panel antenna 4 included in terminal #3. The panel antennas used in the terminals shown below are just examples, and the present disclosure is not limited thereto.

[0638] For example, the terminal #1 of 902_1 uses the panel antenna provided by the terminal #1 of 902_1. Communicate with base station #1 of 901_1. (At this time, Figure 35A As shown, base station #1 of 901_1 uses panel antenna 1 of base station #1 of 901_1.)

[0639] Furthermore, the terminal #1 of 902_1 uses the panel antenna provided by the terminal #1 of 902_1. Communicate with base station #2 of 4001_2. (At this time, Figure 43C As shown, base station #2 of 4001_2 uses panel antenna 3 of base station #2 of 4001_2.)

[0640] As a result, terminal #1 of 902_1 can communicate with both base station #1 of 901_1 and base station #2 of 4001_2, thereby achieving an effect of improving data transmission efficiency.

[0641] For example, the terminal #2 of 902_2 uses the panel antenna of the terminal #2 of 902_2. Communicate with base station #1 of 901_1. (At this time, Figure 35B As shown, base station #1 of 901_1 uses panel antenna 2 of base station #1 of 901_1.)

[0642] Furthermore, the terminal #2 of 902_2 uses the panel antenna provided by the terminal #2 of 902_2. Communicate with base station #2 of 4001_2. (At this time, Figure 43A As shown, base station #2 of 4001_2 uses panel antenna 1 of base station #2 of 4001_2.)

[0643] As a result, terminal #2 of 902_2 can communicate with both base station #1 of 901_1 and base station #2 of 4001_2, thereby achieving an effect of improving data transmission efficiency.

[0644] For example, the terminal #3 of 902_3 uses the panel antenna of the terminal #3 of 902_3. Communicate with base station #1 of 901_1. (At this time, Figure 35C As shown, base station #1 of 901_1 uses panel antenna 3 of base station #1 of 901_1.)

[0645] Furthermore, the terminal #3 of 902_3 uses the panel antenna provided by the terminal #3 of 902_3. Communicate with base station #2 of 4001_2. (At this time, Figure 43B As shown, base station #2 of 4001_2 uses panel antenna 3 of base station #2 of 4001_2.)

[0646] As a result, terminal #3 of 902_3 can communicate with both base station #1 of 901_1 and base station #2 of 4001_2, thereby achieving an effect of improving data transmission efficiency.

[0647] As described above, when a terminal has multiple panel antennas, using multiple panel antennas to communicate with multiple base stations can improve data transmission efficiency. Furthermore, as in Embodiment 2, a terminal may use multiple panel antennas to transmit multiple modulated signals to a single base station, or a terminal may use multiple panel antennas to receive multiple modulated signals transmitted by a single base station.

[0648] Next, explain Figure 40 The communication status is an example of the communication status shown. Figure 40 The communication status shown in the example of the communication status can be Figure 26 、 Figure 27 The communication status in is the same. Figure 26 、 Figure 27 An example of a communication situation will be described.

[0649] Figure 26 Shown Figure 40 An example of a situation in which base station #2 of 4001_2 communicates with "terminal #1 of 902_1, terminal #2 of 902_2, and terminal #3 of 902_3." Figure 26 (A) shows an example of the transmission status of the modulated signal of base station #2 of 4001_2. Figure 26 (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". Figure 26 (A) Figure 26 In (B), the horizontal axis is time. Figure 26 In the Figure 18 The same reference numerals are attached to parts that operate in the same manner.

[0650] First, the base station #2 of 4001_2 transmits the sector scanning reference signal 1801_1. Figure 30 The description has been given, so the description is omitted.

[0651] Next, the terminals "Terminal #1 of 902_1, Terminal #2 of 902_2, Terminal #3 of 902_3" transmit the sector scanning reference signal 1851_1. Figure 13 、 Figure 14 etc., so the description is omitted.

[0652] Base station #2 of 4001_2 sends feedback signal group 2602_1. Figure 31A 、 Figure 31B 、 Figure 31C 、 Figure 31D The description has been given, so the description is omitted.

[0653] Then, the base station #2 of 4001_2 transmits "frame group 2603_1 containing data symbols". Figure 32A 、 Figure 32B 、 Figure 32C 、 Figure 32D Since the above description has been given, the description thereof will be omitted. (Therefore, "frame 2603_1 including data symbols" is considered to be a frame for downlink, for example.)

[0654] Next, the terminals "Terminal #1 of 902_1, Terminal #2 of 902_2, Terminal #3 of 902_3" and so on transmit "Frame group 2652_1 including data symbols". In addition, the structure of this frame will be described later in detail. Figure 44 (Thus, the "frame group 2652_1 including data symbols" is considered to be an uplink frame, for example.)

[0655] Next, the base station #2 of 4001_2 transmits "frame group 2603_2 including data symbols". In addition, the method of forming "frame group 2603_2 including data symbols" is as follows: Figure 32A 、 Figure 32B 、 Figure 32C 、 Figure 32D Carry out the method described in the description.

[0656] Next, the terminals "Terminal #1 of 902_1, Terminal #2 of 902_2, Terminal #3 of 902_3" and so on transmit "Frame group 2652_2 including data symbols". In addition, the structure of this frame will be described later. Figure 44 Provide explanation.

[0657] Figure 27 Shown Figure 26 The following is an example of the transmission status of the modulated signal of the base station #2 of 4001_2 and the transmission status of the modulated signal of the terminals such as "terminal #1 of 902_1, terminal #2 of 902_2, and terminal #3 of 902_3". Figure 27 In the Figure 18 The same reference numerals are attached to parts that operate in the same manner.

[0658] Figure 27 (A) shows an example of the transmission status of the modulated signal of the base station #2 of 4001_2, which is continuous in time with Figure 26 (A) The transmission status of the modulated signal of base station #2 of 4001_2.

[0659] Figure 27 (B) shows an example of the transmission status of the modulated signal of "terminal #1 of 902_1, terminal #2 of 902_2, and terminal #3 of 902_3", which is continuous in time from Figure 26 (B) shows the transmission status of the modulated signals of "terminal #1 of 902_1, terminal #2 of 902_2, and terminal #3 of 902_3".

[0660] In addition, Figure 27 (A) Figure 27 In (B), the horizontal axis is time.

[0661] exist Figure 26 (A) Figure 26 After (B), the base station #2 of 4001_2 sends "frame group 2603_3 containing data symbols". In addition, the method of forming "frame group 2603_2 containing data symbols" is as follows: Figure 32A 、 Figure 32B 、 Figure 32C 、 Figure 32D Carry out the method described in the description.

[0662] Next, the terminals "Terminal #1 of 902_1, Terminal #2 of 902_2, Terminal #3 of 902_3" and so on transmit "Frame group 2652_3 including data symbols". In addition, the structure of this frame will be described later. Figure 44 Provide explanation.

[0663] Next, base station #2 of 4001_2 transmits sector scanning reference signal 1801_2. Figure 30 The description has been given, so the description is omitted.

[0664] Next, the terminals "Terminal #1 of 902_1, Terminal #2 of 902_2, Terminal #3 of 902_3" transmit the sector scanning reference signal 1851_2. Figure 13 、 Figure 14 etc., so the description is omitted.

[0665] Base station #2 of 4001_2 sends feedback signal group 2602_2. Figure 31A 、 Figure 31B 、 Figure 31C 、 Figure 31D The description has been given, so the description is omitted.

[0666] Then, the base station #2 of 4001_2 transmits "frame group 2603_4 containing data symbols". Figure 32A 、 Figure 32B 、 Figure 32C 、 Figure 32D The description has been given, so the description is omitted.

[0667] Next, the terminals "Terminal #1 of 902_1, Terminal #2 of 902_2, Terminal #3 of 902_3" transmit "Frame group 2652_4 including data symbols". In addition, the structure of this frame will be described later. Figure 44 Provide explanation.

[0668] In this way, base station #2 and the terminal in 4001_2 can transmit a sector scanning reference signal before "base station #2 in 4001_2 transmits a 'frame group containing data symbols' and / or 'terminal #1 in 902_1, terminal #2 in 902_2, terminal #3 in 902_3, and so on transmit a 'frame group containing data symbols'." Furthermore, base station #2 and the terminal in 4001_2 can transmit a sector scanning reference signal again after "base station #2 in 4001_2 transmits a 'frame group containing data symbols' and / or 'terminal #1 in 902_1, terminal #2 in 902_2, terminal #3 in 902_3, and so on transmit a 'frame group containing data symbols'." By selecting the transmit panel antenna to be used and setting transmit beamforming in this way, the base station and the terminal can achieve high data reception quality.

[0669] Furthermore, “terminal #1 of 902_1, terminal #2 of 902_2, and terminal #3 of 902_3” can of course communicate with base station #1 of 901_1 in the same manner.

[0670] Alternatively, the communication between terminal #1 of 902_1 and the two base stations (communication with base station #1 of 901_1 and communication with base station #2 of 4001_2) may be non-synchronous (non-coherent or partially coherent). For example, terminal #1 of 902_1 may transmit a frame group (including data symbols) to base station #1 of 901_1 (see Figure 36 ), receiving feedback signals from base station #2 of 4001_2 (refer to Figure 42C). As another example, for terminal #1 of 902_1, the received "type of codeword sent by base station #1 of 901_1" is different from the received "type of codeword sent by base station #2 of 4001_2". Moreover, for terminal #1 of 902_1, the sent "type of codeword sent to base station #1 of 901_1" is different from the sent "type of codeword sent to base station #2 of 4001_2". In addition, similar to terminal #1 of 902_1, the communications between terminal #2 of 902_2 and terminal #3 of 902_3 and the two base stations (communication with base station #1 of 901_1 and communication with base station #2 of 4001_2) are not synchronized. In other words, when a terminal communicates with multiple base stations, the communication conditions between the multiple base stations and the terminal can be independent of each other. However, the communication between the terminal and the two base stations may also be synchronized (coherent or partially-coherent).

[0671] Next, use Figure 44 The following describes a structural example of a "frame group 2652_i containing data symbols" transmitted by terminals such as "terminal #1 of 902_1, terminal #2 of 902_2, and terminal #3 of 902_3". For example, i is set to an integer greater than 1. Figure 44 , the horizontal axis is time.

[0672] like Figure 44 As shown, the "frame group 2652_i including data codewords" is composed of the first time interval, the second time interval, the third time interval, and the fourth time interval.

[0673] For example, terminal #1 at 902_1 transmits frame group 4401_1 (including data symbols) using the fourth time interval. Furthermore, terminal #2 at 902_2 transmits frame group 4401_2 (including data symbols) using the first time interval. Terminal #3 at 902_3 transmits frame group 4401_3 (including data symbols) using the third time interval.

[0674] In addition, Figure 44 In the embodiment, each terminal can use multiple time intervals to send a modulated signal (time slot), and each terminal can also send multiple modulated signals (time slots) in a certain time interval. This has been described in Embodiment 1, Embodiment 2, etc.

[0675] In this way, for example, by time-dividing the "frame groups 2652_i containing data symbols" transmitted by terminals such as "terminal #1 at 902_1 and terminal #2 at 902_2," each terminal transmits the frame groups, which are then received by base station #2 at 4001_2. This reduces interference and achieves high data reception quality. Furthermore, by using a panel antenna at base station #2 at 4001_2, even when multiple terminals transmit modulated signals (time slots) simultaneously, interference between them is minimized.

[0676] In addition, Figure 44 Frame group 4401_1, frame group 4401_2, and frame group 4401_3 may include, in addition to data symbols, "reference signals such as DMRS, PTRS, SRS," pilot symbols, pilot signals, preambles, symbols containing control information, and the like.

[0677] exist Figure 44 , the case where time division is used for the frame group transmitted by the terminal is described, but the frame group transmitted by the terminal can be frequency divided, and can also be spatially divided by using a panel antenna and using MU-MIMO.

[0678] Figure 45A yes Figure 43A A variation of Figure 45A In the Figure 43A The same reference numerals are attached to parts that operate in the same manner. Figure 45B yes Figure 43B A variation of Figure 45B In the Figure 43B The same reference numerals are attached to parts that operate in the same manner. Figure 45C yes Figure 43C A variation of Figure 45C In the Figure 43C The same reference numerals are attached to parts that operate in the same manner. Figure 45D yes Figure 43D A variation of Figure 45D In the Figure 43D The same reference numerals are attached to parts that operate in the same manner.

[0679] Figure 45A and Figure 43A The difference is that: Figure 43A In the example, the modulated signal (time slot) 4301_2 sent to terminal #2 consists of 1 time slot, and Figure 45A In the example, the modulated signal (time slot) 4301_2 sent to terminal #2 consists of 3 time slots. Figure 43A There are unassigned empty time slots in Figure 45AIn addition, in terms of effectively utilizing empty time slots, Figure 45B 、 Figure 45C Therefore, the use of time slots is not limited to Figure 43A 、 Figure 43B 、 Figure 43C 、 Figure 43D 、 Figure 45A 、 Figure 45B 、 Figure 45C 、 Figure 45D .

[0680] In addition, if we focus on Figure 45A 、 Figure 45B 、 Figure 45C 、 Figure 45D The second time slot of each figure is Figure 45A There is a modulated signal (time slot) 4301_2 sent to terminal #2, Figure 45B There is a modulated signal (time slot) 4301_3 sent to terminal #3, Figure 45C There is a modulated signal (time slot) 4301_1 sent to terminal #1. For example, in Figure 45A 、 Figure 45B 、 Figure 45C 、 Figure 45D In a certain time interval, the second time slot in each figure, there may also be a modulated signal (time slot) with a different transmission destination for each panel antenna. In this case, the four panel antennas may or may not use the same frequency (same frequency band).

[0681] Furthermore, when the same frequency (same frequency band) is used, it can be considered that MU-MIMO transmission is being used. For example, when the directivity differs between panel antennas, the following effect can be achieved: even when MU-MIMO is used, interference can be reduced. (Note that the relevant transmission method has also been described in Embodiment 2.)

[0682] In addition, it may also be the case that when the base station #2 of 4001_2 sends the modulation signal according to the panel antenna, for example, the modulation signal sent using the panel antenna 1 and the modulation signal sent using the panel antenna 2 exist in the same time interval, and the frequency (frequency band) of the modulation signal sent using the panel antenna 1 is the same as or partially the same as the frequency (frequency band) of the modulation signal sent using the panel antenna 2.

[0683] For example, when a modulated signal is transmitted from each panel antenna, the following examples 5-1, 5-2, and 5-3 can be considered.

[0684] Example 5-1:

[0685] Base station #2 of 4001_2 has multiple panel antennas. When modulated signals are sent from each panel antenna, a set of modulated signals with the same or partially the same frequency (frequency band) may exist in a certain time interval.

[0686] As another method, the frequency (frequency band) of the modulated signal transmitted by the base station #2 of 4001_2 using the panel antenna 1 may be different from the frequency (frequency band) of the modulated signal transmitted by the panel antenna 2.

[0687] Example 5-2:

[0688] Base station #2 of 4001_2 has multiple panel antennas. When modulated signals are transmitted from each panel antenna, there may also be a collection of modulated signals with different frequencies (frequency bands).

[0689] Moreover, it is also possible that the frequency (band) of the modulated signal sent by base station #2 of 4001_2 using panel antenna 1 is the same as the frequency (band) of the modulated signal sent using panel antenna 2, and these two modulated signals are time-division multiplexed.

[0690] Example 5-3:

[0691] Base station #2 of 4001_2 has multiple panel antennas. When modulated signals are transmitted from each panel antenna, there may be a set of modulated signals with the same frequency (frequency band) and time-division multiplexing.

[0692] In addition, for example, the base station #2 at 4001_2 is Figure 1A 、 Figure 1B 、 Figure 1C Even with a configuration such as , a modulated signal can be generated based on control signal 100, such that "the 5-1st instance exists," and / or "the 5-2nd instance exists," and / or "the 5-3rd instance exists," and transmitted from the panel antenna. However, while control signal 100 is output from the third processing unit, this configuration is not limiting. For example, control signal 100 can be another internal output, or it can be an external signal.

[0693] Next, explain Figure 40 The relationship between the modulated signal sent by base station #1 of 901_1 to the terminal and the modulated signal sent by base station #2 of 4001_2 to the terminal.

[0694] For example, in Figure 40In this example, terminal #1 at 902_1 receives a modulated signal transmitted by base station #1 at 901_1 and a modulated signal transmitted by base station #2 at 4001_2. In this case, during a certain time interval, the frequency (frequency band) of the modulated signal transmitted by base station #1 at 901 (toward terminal #1 at 902_1) and the frequency (frequency band) of the modulated signal transmitted by base station #2 at 4001_2 (toward terminal #1 at 902_1) may be identical or partially identical.

[0695] For example, when a terminal communicates with multiple base stations, the following examples 5-4, 5-5, and 5-6 may be considered.

[0696] Example 5-4:

[0697] The terminal communicates with multiple base stations. Regarding the modulation signals sent by the multiple base stations to the terminal, a set of modulation signals with the same or partially the same frequency (frequency band) may exist in a certain time interval.

[0698] As another method, terminal #1 at 902_1 receives a modulated signal transmitted by base station #1 at 901_1 and a modulated signal transmitted by base station #2 at 4001_2. In this case, the frequency (frequency band) of the modulated signal transmitted by base station #1 at 901 (toward terminal #1 at 902_1) and the frequency (frequency band) of the modulated signal transmitted by base station #2 at 4001_2 (toward terminal #1 at 902_1) may differ.

[0699] Example 5-5:

[0700] The terminal communicates with a plurality of base stations, and the modulated signals sent by the plurality of base stations to the terminal may include a set of modulated signals having different frequencies (frequency bands).

[0701] Terminal #1 at 902_1 receives the modulated signal transmitted by base station #1 at 901_1 and the modulated signal transmitted by base station #2 at 4001_2. At this time, the frequency (band) of the modulated signal transmitted by base station #1 at 901 (toward terminal #1 at 902_1) and the frequency (band) of the modulated signal transmitted by base station #2 at 4001_2 (toward terminal #1 at 902_1) are the same, and these two modulated signals can also be time-division multiplexed.

[0702] Example 5-6:

[0703] The terminal communicates with a plurality of base stations, and the modulated signals sent by the plurality of base stations to the terminal may include a set of modulated signals having the same frequency (frequency band) and being time-division multiplexed.

[0704] In addition, for example, base station #1 of 901_1 is Figure 1A 、 Figure 1B 、 Figure 1C The structure of 4001_2 base station #2 is Figure 1A 、 Figure 1B 、 Figure 1C The structure can also be controlled in an appropriately switched manner, so that "the base station #1 of 901_1 generates a modulation signal according to the control signal 100 in a manner of "there is a 5-4th instance", and / or "there is a 5-5th instance", and / or "there is a 5-6th instance", and transmits the modulation signal from the panel antenna", and "the base station #2 of 4001_2 generates a modulation signal according to the control signal 100 in a manner of "there is a 5-4th instance", and / or "there is a 5-5th instance", and / or "there is a 5-6th instance", and transmits the modulation signal from the panel antenna". However, although the structure of the control signal 100 is set to be an output from the third processing unit, it is not limited to this structure. For example, the control signal 100 can be other outputs from the internal, or it can be a signal from the outside.

[0705] Furthermore, terminal #1 at 902_1 receives the modulated signal transmitted by base station #1 at 901_1 and the modulated signal transmitted by base station #2 at 4001_2. In this case, the modulated signal transmitted by base station #2 at 4001_2 (toward terminal #1 at 902_1) may also include some or all of the data contained in the modulated signal transmitted by base station #1 at 901 (toward terminal #1 at 902_1).

[0706] Therefore, when a terminal communicates with multiple base stations, it can obtain certain data from two or more base stations, thereby achieving an effect of improving the reception quality of the data.

[0707] As described in the present embodiment, the terminal transmits a reference signal for sector scanning in a manner that reduces the number of collisions, thereby achieving the following effect: improving the communication capacity of a system composed of a base station and a 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 or multiple transmission directivities and reception directivities of antennas is sufficient. In addition, although signals and frames exist in each figure, the names are not limited to these. What is important is the function of the transmitted signal itself.

[0708] Furthermore, as in this embodiment, by efficiently using the panel antenna, the terminal communicates with a plurality of base stations, thereby achieving the effect of improving data transmission efficiency and data reception quality.

[0709] (Implementation 6)

[0710] In this embodiment, modifications of Embodiments 1 to 5 are described.

[0711] Figure 46A : is a diagram showing an example of the structure of a communication system according to Embodiment 6. Figure 46A As shown, it is assumed that base station 4601_0 and terminal #1 of 4602_1 communicate using the first frequency (band). In addition, it is assumed that base station 4601_0 and terminal #1 of 4602_1 communicate using the second frequency (band).

[0712] For example, there is a method in which the first frequency (band) is set to a frequency above 52.6 GHz, and the second frequency (band) is set to FR (Frequency Range) 1 and / or FR2. However, FR1 is set to "frequencies between 450 MHz and below 6 GHz," and FR2 is set to "frequencies between 24.25 GHz and 52.6 GHz." As another example, the first frequency (band) may be a frequency higher than the second frequency (band). Furthermore, the first frequency (band) may be set to FR2, and the second frequency (band) may be set to FR1.

[0713] Figure 46B This is a diagram showing the sixth embodiment. Figure 46A Figure 1 shows an example of the structure of different communication systems. Figure 46B As shown, base station #1 at 4601_1 communicates with terminal #1 at 4602_1 using the first frequency band. Furthermore, base station #2 at 4601_2 communicates with terminal #2 at 4602_1 using the second frequency band. Furthermore, base stations #1 at 4601_1 and #2 at 4601_2 communicate using wired and / or wireless communication.

[0714] Figure 47 This figure shows an example of the configuration of a terminal according to Embodiment 6. First frequency communication device 4702 generates and transmits a modulated signal of a first frequency (band). Furthermore, first frequency communication device 4702 receives and demodulates a modulated signal of a first frequency (band).

[0715] Therefore, the first frequency communication device 4702 takes the control signal 4722 as input, and when the control signal 4722 contains information on generating a modulation signal for the first frequency (band), takes the data 4701 as input, performs error correction coding, modulation (mapping based on the modulation method), processing for transmission (for example, processing for SISO (Single Input Single Output), MIMO, MISO (Multiple Input Single Output)), frequency conversion, amplification, and other processing to generate a modulated signal, and transmit it as a radio wave.

[0716] In addition, the first frequency communication device 4702 receives the modulation signal (radio wave) of the first frequency (band) sent by the communication partner based on the information of the control signal 4722, performs frequency conversion, processing for reception, error correction decoding, etc., and outputs the received data 4703.

[0717] In addition, the specific structure of the first frequency communication device 4702 may be, for example, Figure 1A 、 Figure 1B 、 Figure 1C The operation examples of the first frequency communication device 4702 have been described in Embodiments 1 to 5 and the like.

[0718] The second frequency communication device 4712 generates and transmits a modulated signal of the second frequency (band). In addition, the second frequency communication device 4712 receives and demodulates a modulated signal of the second frequency (band).

[0719] Therefore, the second frequency communication device 4712 takes the control signal 4722 as input, and when the control signal 4722 contains information on generating a modulation signal for the second frequency (band), takes the data 4711 as input, performs error correction coding, modulation (mapping based on the modulation method), processing for transmission (for example, processing for SISO, MIMO, MISO), frequency conversion, amplification, and other processing to generate a modulation signal, and transmit it as a radio wave.

[0720] In addition, the second frequency communication device 4712 receives the modulation signal (radio wave) of the second frequency (band) sent by the communication partner based on the information of the control signal 4722, performs frequency conversion, processing for reception, error correction decoding, etc., and outputs the received data 4713.

[0721] In addition, the specific structure of the second frequency communication device 4712 may be, for example, Figure 1A 、 Figure 1B 、 Figure 1CThe operation examples of the second frequency communication device 4712 have been described in Embodiments 1 to 5 and the like.

[0722] The control unit 4721 takes the received data 4703 and 4713 as input, generates and outputs a control signal 4722, which includes information on a control signal for sending the first frequency (band), a control signal for receiving the first frequency (band), a control signal for sending the second frequency (band), and a control signal for receiving the second frequency (band).

[0723] Figure 48 This figure shows an example of the configuration of a base station according to Embodiment 6. First frequency communication device 4802 generates and transmits a modulated signal of a first frequency (band). Furthermore, first frequency communication device 4802 receives and demodulates a modulated signal of a first frequency (band).

[0724] Therefore, the first frequency communication device 4802 takes the control signal 4822 as input, and when the control signal 4822 contains information on generating a modulation signal for the first frequency (band), takes the data 4801 as input, performs error correction coding, modulation (mapping based on the modulation method), processing for transmission (for example, processing for SISO, SIMO, MIMO, MISO), frequency conversion, amplification, and other processing to generate a modulation signal, and transmit it as a radio wave.

[0725] In addition, the first frequency communication device 4802 receives the modulation signal (radio wave) of the first frequency (band) sent by the communication partner based on the information of the control signal 4822, performs frequency conversion, processing for reception, error correction decoding, etc., and outputs the received data 4803.

[0726] In addition, the specific structure of the first frequency communication device 4802 may be, for example, Figure 1A 、 Figure 1B 、 Figure 1C The operation examples of the first frequency communication device 4802 have been described in Embodiments 1 to 5 and the like.

[0727] The second frequency communication device 4812 generates and transmits a modulated signal of the second frequency (band). In addition, the second frequency communication device 4812 receives and demodulates a modulated signal of the second frequency (band).

[0728] Therefore, the second frequency communication device 4812 takes the control signal 4822 as input, and when the control signal 4822 contains information on generating a modulation signal for the second frequency (band), takes the data 4811 as input, performs error correction coding, modulation (mapping based on the modulation method), processing for transmission (for example, processing for SISO, SIMO, MIMO, MISO), frequency conversion, amplification, and other processing to generate a modulation signal, and transmit it as a radio wave.

[0729] In addition, the second frequency communication device 4812 receives the modulation signal (radio wave) of the second frequency (band) sent by the communication object based on the information of the control signal 4822, performs frequency conversion, processing for reception, error correction decoding, etc., and outputs the received data 4813.

[0730] The control unit 4821 takes the received data 4803 and 4813 as input, generates and outputs a control signal 4822, which includes information on a control signal for sending the first frequency (band), a control signal for receiving the first frequency (band), a control signal for sending the second frequency (band), and a control signal for receiving the second frequency (band).

[0731] also, Figure 46A and Figure 46B The base station #1 of 4601_1 and the base station #2 of 4601_2 shown may also have Figure 48 structure.

[0732] Figure 49A This is a diagram showing embodiment 6. Figure 46B FIG4 shows an example of the structure of base station #1 of 4601_1. First frequency communication device 4902 generates and transmits a modulated signal of the first frequency (band). In addition, first frequency communication device 4902 receives and demodulates the modulated signal of the first frequency (band).

[0733] Therefore, the first frequency communication device 4902 takes the first control signal 4904 as input, and when it is necessary to generate a modulation signal of the first frequency (band) based on information such as the first control signal 4904, takes the data 4901 as input, performs error correction coding, modulation (mapping based on the modulation method), processing for transmission (for example, processing for SISO, SIMO, MIMO, MISO), frequency conversion, amplification, and other processing to generate a modulation signal, and transmit it as a radio wave.

[0734] In addition, the first frequency communication device 4902 receives the modulation signal (radio wave) of the first frequency (band) sent by the communication object based on information such as the first control signal 4904, performs frequency conversion, processing for reception, error correction decoding, etc., and outputs the received data 4903.

[0735] Furthermore, first frequency communication device 4902 may also output second control signal 4905. In this case, first control signal 4904 is a signal obtained from base station #2 of 4601_2 via the network, and second control signal 4905 is transmitted to base station #2 of 4601_2 via the network.

[0736] Figure 49B This is a diagram showing embodiment 6. Figure 46B FIG4 shows an example of the configuration of base station #2 of 4601_2. Second frequency communication device 4912 generates and transmits a modulated signal of the second frequency (band). Furthermore, second frequency communication device 4912 receives and demodulates the modulated signal of the second frequency (band).

[0737] Therefore, the second frequency communication device 4912 takes the third control signal 4914 as input, and when it is necessary to generate a modulation signal of the second frequency (band) based on information such as the third control signal 4914, it takes the data 4911 as input, performs error correction coding, modulation (mapping based on the modulation method), processing for transmission (for example, processing for SISO, SIMO, MIMO, MISO), frequency conversion, amplification, and other processing to generate a modulation signal, and transmit it as a radio wave.

[0738] In addition, the second frequency communication device 4912 receives the modulation signal (radio wave) of the second frequency (band) sent by the communication object based on information such as the third control signal 4914, performs frequency conversion, processing for reception, error correction decoding, etc., and outputs the received data 4913.

[0739] Furthermore, second frequency communication device 4912 may also output fourth control signal 4915. In this case, third control signal 4914 is a signal obtained from base station #1 of 4601_1 via the network, and fourth control signal 4915 is transmitted to base station #1 of 4601_1 via the network.

[0740] Figure 50A 、 Figure 50B and Figure 50C This is a diagram showing an example of the transmission status from time t0 to time t5.

[0741] Figure 50A Shown Figure 46A An example of a modulation signal of the first frequency (band) transmitted by base station 4601_0, or Figure 46B An example of a modulated signal of the first frequency (band) transmitted by base station #1 of 4601_1.

[0742] In addition, Figure 50A In the Figure 10 The same reference numerals are attached to parts that operate in the same manner.

[0743] Figure 50B Shown Figure 46A and Figure 46B An example of a modulated signal of the second frequency (band) sent by terminal #1 of 4602_1.

[0744] Figure 50C Shown Figure 46A An example of a modulation signal of the second frequency (band) transmitted by the base station 4601_0, or Figure 46B An example of a modulated signal of the second frequency (band) sent by base station #2 of 4601_2.

[0745] right Figure 46A The operation example of the communication system shown in FIG.

[0746] like Figure 50A As shown, Figure 46A The base station 4601_0 transmits a sector scanning reference signal 1001 in the time interval from time t0 to time t1.

[0747] Furthermore, the time interval from time t1 to time t2 is the response interval of the terminal.

[0748] like Figure 50A As shown, Figure 46A The base station 4601_0 sends a feedback signal 1002 in the time interval from time t2 to time t3.

[0749] Figure 11 Shown Figure 46A The base station 4601_0 sends Figure 50A An example of a sector scan using reference signal 1001. Figure 11 The operation has been explained, so the explanation is omitted.

[0750] 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 explained, so the explanation is omitted.

[0751] Then, if Figure 50B As shown, Figure 46A Terminal #1 of 4602_1 uses the second frequency (band) to send frame T1 of 5001_1.

[0752] At this point, you can also do the following Figure 51 As shown, the frame T1 of 5001_1 is sent using PUCCH (Physical Uplink Control Channel).

[0753] Figure 51 This is a diagram showing an example of a PUCCH of a terminal. Figure 51 In the figure, the horizontal axis is time and the vertical axis is frequency.

[0754] For example, Figure 46A Terminal #1 of 4602_1 uses Figure 51 The "terminal #1 transmits PUCCH" 5101_1 shown here transmits frame T1 of 5001_1.

[0755] In addition, in other frequencies, "PUCCH transmitted by terminal #x" 5101_x transmitted by terminal #x may also exist.

[0756] In addition, in addition to PUCCH, RACH (Random Access Channel), PUSCH (Physical Uplink Shared Channel), etc. can also be used to transmit the frame T1 of 5001_1, and it is not limited to these channels.

[0757] Figure 52 It shows Figure 46A A diagram showing an example of the structure of frame T1 of 5001_1 transmitted from terminal #1 of 4602_1.

[0758] For example, suppose that Figure 46A The frame T1 of 5001_1 sent by terminal #1 of 4602_1 includes “information related to first frequency (band) sector scanning” 5201 and “request information of terminal requesting to implement / not implement first frequency (band) transmission” 5202.

[0759] Assume that the "information related to the first frequency (band) sector scan" 5201 includes Figure 46A The information about the "transmitting panel antenna and parameter number of base station 4601_0" in the sector scanning reference signal 1001 transmitted by base station 4601_0, which has good reception quality for terminal #1 of 4602_1, has been described in Embodiments 1 to 5.

[0760] In addition, this information can be generated by obtaining the sector scanning reference signal 1001 and the "ID (identification number) of the transmitting panel antenna" and the "identification number (ID) of the parameter used for beamforming (directivity control)" contained in the sector scanning reference signal 1001.

[0761] Assume that the "terminal request to implement / not implement the first frequency transmission request information" 5202 contains Figure 46A Information on whether terminal #1 of 4602_1 implements the transmission of the first frequency (band) to base station 4601_0.

[0762] Figure 46A Base station 4601_0 receives frame T1 of 5001_1 transmitted by terminal #1 of 4602_1. Subsequently, for example, in the time interval from time t2 to time t3, base station 4601_0 transmits frame B1 of 5011_1.

[0763] Figure 53 It shows Figure 46A A diagram showing an example of the structure of frame B1 of 5011_1 transmitted by base station 4601_0 using the second frequency (band).

[0764] For example, suppose that Figure 46A The frame B1 of 5011_1 transmitted by the base station 4601_0 includes “information related to allocation of frames including data symbols of the first frequency” 5301 .

[0765] Assume that the "information on allocation of frames containing data symbols of the first frequency" 5301 includes at least Figure 46A Base station 4601_0 sends information about the time slot of the data codeword sent to terminal #1 of 4602_1.

[0766] For example, Figure 17 As shown, Figure 50A The frame 1003 containing data codewords is composed of a modulation signal (time slot) 1701_1 sent to the first terminal, a modulation signal (time slot) 1701_2 sent to the second terminal, a modulation signal (time slot) 1701_3 sent to the third terminal and a modulation signal (time slot) 1701_4 sent to the fourth terminal. Figure 46A The base station 4601_0 uses Figure 17 The modulated signal (time slot) 1701_1 sent to the first terminal sends a frame containing data codewords to the terminal #1 of 4602_1.

[0767] In this case, Figure 53 The "information related to allocation of frames containing data codewords of the first frequency" 5301 includes "information indicating that a frame containing data codewords is transmitted using the modulation signal (time slot) 1701_1 sent to the first terminal."

[0768] therefore, Figure 46A Terminal #1 of 4602_1 can know the position of the frame containing data symbols sent by base station 4601_0 to terminal #1 of 4602_1 by obtaining "information related to allocation of frames containing data symbols of the first frequency" 5301. Figure 46A Terminal #1 of 4602_1 can receive the modulated signal of the first frequency (band) sent by base station 4601_0 and obtain the data contained in the data codeword.

[0769] In addition, the base station 4601_0 sends Figure 50A The method of constructing a frame containing data symbols is not limited to Figure 17 . Figure 50A Other methods of constructing a frame containing data codewords include, for example, the methods described in embodiments 1 to 5.

[0770] In addition, Figure 46A The frame B1 of 5011_1 sent by the base station 4601_0 using the second frequency (band) not only includes information on the position of the data codewords, but also includes, for example, information related to the error correction coding method used to generate the data codewords, information on the transmission method used to generate the data codewords, information on the modulation method used to generate the data codewords, etc.

[0771] Therefore, if Figure 50A As shown, Figure 46A The base station 4601_0 sends a signal containing Figure 46A "Frame 1003 containing data codewords" of data codewords sent to terminal #1 of 4602_1.

[0772] right Figure 52 The operation when the "terminal request information for executing / not executing the first frequency transmission" 5202 indicates "not executing" will be described.

[0773] In the case of 5202 indicating "not implemented", Figure 46A Terminal #1 of 4602_1 does not send the modulation signal of the first frequency (band).

[0774] Therefore, when terminal #1 of 4602_1 needs to transmit data to base station 4601_0, terminal #1 of 4602_1 sends, for example, a modulated signal of the second frequency (band) or a modulated signal of the third frequency (band).

[0775] Furthermore, the third frequency (band) is a frequency (band) different from the first frequency (band), and furthermore, the third frequency (band) is a frequency (band) different from the second frequency (band).

[0776] right Figure 52 The operation when the "terminal request information for executing / not executing the first frequency transmission" 5202 indicates "execution" will be described.

[0777] In the case of 5202 indicating "implementation", Figure 46A Terminal #1 of 4602_1 sends a modulated signal of the first frequency (band).

[0778] therefore, Figure 46A Terminal #1 of 4602_1 needs to transmit a signal for sector scanning. That is, terminal #1 of 4602_1 transmits a signal for sector scanning to determine the antenna and beamforming parameters used by terminal #1 for transmission and the antenna and beamforming parameters used by base station 4601_0 for reception.

[0779] Figure 54 It shows Figure 46A This is a diagram showing an example of a case where terminal #1 of 4602_1 transmits a sector scanning signal. Figure 54 In the Figure 13 The same reference numerals are attached to parts that operate in the same manner.

[0780] For example, in Figure 50A 、 Figure 50B 、 Figure 50C In the time interval from time t1 to time t2, Figure 46A Terminal #1 of 4602_1 transmits a reference signal for sector scanning using the first frequency (band). The detailed method has been described in Embodiments 1 to 5, etc., and will therefore be briefly described here.

[0781] like Figure 54 As shown, Figure 46A Terminal #1 of 4602_1 transmits sector scanning reference signal 5401_1 in "1st terminal 'sector scanning reference signal' transmission interval" 1301_1. Figure 46A Base station 4601_0 receives sector scanning reference signal 5401_1 and transmits a modulated signal to, for example, terminal #1 at 4602_1. This determines the antenna and beamforming parameters used by terminal #1 at 4602_1 for transmission, and the antenna and beamforming parameters used by base station 4601_0 for reception. Details have been described in Embodiments 1 to 5, and are therefore omitted.

[0782] Furthermore, the above description states that “in Figure 50A 、 Figure 50B 、 Figure 50C In the time interval from time t1 to time t2, Figure 46ATerminal #1 of 4602_1 uses the first frequency (band) to send a reference signal for sector scanning", but " Figure 46A The time interval in which terminal #1 of 4602_1 transmits a reference signal for sector scanning using the first frequency (band) is not limited to this time interval.

[0783] For example, Figure 46A Terminal #1 of 4602_1 can use the first frequency (band) to send a reference signal for sector scanning in the terminal response interval of other time periods, and can also send a reference signal for sector scanning in the interval of sending data code elements.

[0784] Figure 46A After sending a reference signal for sector scanning, terminal #1 of 4602_1 sends a frame containing data codewords to base station 4601_0.

[0785] Figure 55 This is a diagram illustrating an example of a modulation signal of the first frequency transmitted by terminal #1. Figure 55 In the Figure 20 The same reference numerals are attached to parts that operate in the same manner.

[0786] like Figure 55 As shown, Figure 46A Terminal #1 of 4602_1 transmits frame 5501_1 including data symbols in the first time interval of frame 1851_i including data symbols.

[0787] The method of selecting the time interval of the frame of terminal #1 transmitting 4602_1 has been described in Embodiments 1 to 5, etc., and therefore the description thereof is omitted.

[0788] In the above description, the base station 4601_0 sends Figure 50A In frame 1003 containing data codewords, base station 4601_0 can also use a transmission method of using multiple antennas to send multiple modulated signals.

[0789] In addition, this has been described in detail in Embodiments 1 to 5. In addition, the terminal #1 of 4602_1 sends Figure 50B In the frame T1 of 5001_1, the terminal #1 of 4602_1 can also use a transmission method of transmitting multiple modulated signals using multiple antennas. Figure 50C In frame B1 of 5011_1, base station 4601_0 may also use a transmission method of transmitting multiple modulated signals using multiple antennas.

[0790] In addition, when the base station 4601_0 uses the second frequency (band) to transmit a modulated signal, it may also use a transmission method of transmitting multiple modulated signals using multiple antennas.

[0791] Moreover, when terminal #1 of 4602_1 uses the first frequency (band) to transmit a modulated signal, a transmission method of transmitting multiple modulated signals using multiple antennas may also be used.

[0792] right Figure 46B The operation example of the communication system shown in FIG.

[0793] like Figure 50A As shown, Figure 46B The base station #1 of 4601_1 transmits a sector scanning reference signal 1001 in the time interval from time t0 to time t1.

[0794] Furthermore, the time interval from time t1 to time t2 is the response interval of the terminal.

[0795] like Figure 50A As shown, Figure 46B The base station #1 of 4601_1 sends a feedback signal 1002 in the time interval from time t2 to time t3.

[0796] Figure 11 Shown Figure 46B The 4601_1 base station #1 sends Figure 50A An example of a sector scan using reference signal 1001. Figure 11 The operation has been explained, so the explanation is omitted.

[0797] 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 explained, so the explanation is omitted.

[0798] Then, if Figure 50B As shown, Figure 46A Terminal #1 of 4602_1 uses the second frequency (band) to send frame T1 of 5001_1.

[0799] At this time, if Figure 51 As shown, PUCCH can also be used for frame T1 of 5001_1.

[0800] For example, Figure 46B Terminal #1 of 4602_1 sends Figure 51 "Terminal #1 sends PUCCH" 5101_1 as frame T1 of 5001_1.

[0801] In addition, in other frequencies, "PUCCH transmitted by terminal #x" 5101_x transmitted by terminal #x may also exist.

[0802] In addition, in addition to PUCCH, RACH, PUSCH, etc. can also be used to transmit the frame T1 of 5001_1, and it is not limited to these channels.

[0803] Figure 52 Shown Figure 46B An example of the structure of frame T1 of 5001_1 transmitted by terminal #1 of 4602_1.

[0804] For example, suppose that Figure 46B The frame T1 of 5001_1 sent by terminal #1 of 4602_1 includes “information related to first frequency (band) sector scanning” 5201 and “request information of terminal requesting to implement / not implement first frequency (band) transmission” 5202.

[0805] Assume that the "information related to the first frequency (band) sector scan" 5201 includes Figure 46B The information about the transmission panel antenna and parameter number of base station #1 at 4601_1, which indicates that the reception quality of sector scanning reference signal 1001 transmitted by base station #1 at 4601_1 is good for terminal #1 at 4602_1, has been described in Embodiments 1 to 5.

[0806] In addition, this information can be generated by obtaining the sector scanning reference signal 1001 and the "ID (identification number) of the transmitting panel antenna" and the "identification number (ID) of the parameter used for beamforming (directivity control)" contained in the sector scanning reference signal 1001.

[0807] Assume that the "terminal request to implement / not implement the first frequency transmission request information" 5202 contains Figure 46B Information on whether terminal #1 of 4602_1 implements the transmission of the first frequency (band) to base station #1 of 4601_1.

[0808] Figure 46B Base station #2 of 4601_2 receives frame T1 of 5001_1 transmitted by terminal #1 of 4602_1. Then, for example, in the time interval from time t2 to time t3, base station #2 of 4601_2 transmits frame B1 of 5011_1.

[0809] Figure 53 Shown Figure 46B An example of the structure of frame B1 of 5011_1 transmitted by base station #2 of 4601_2 using the second frequency (band).

[0810] For example, suppose that Figure 46B The frame B1 of 5011_1 transmitted from the base station #2 of 4601_2 includes “information related to allocation of frames including data symbols of the first frequency” 5301 .

[0811] Assume that the "information on allocation of frames containing data symbols of the first frequency" 5301 includes at least Figure 46B The base station #1 of 4601_1 sends the time slot information of the data codeword to the terminal #1 of 4602_1.

[0812] For example, Figure 17 As shown, Figure 50A The frame 1003 containing data codewords is composed of a modulation signal (time slot) 1701_1 sent to the first terminal, a modulation signal (time slot) 1701_2 sent to the second terminal, a modulation signal (time slot) 1701_3 sent to the third terminal and a modulation signal (time slot) 1701_4 sent to the fourth terminal. Figure 46B The base station #1 of 4601_1 uses Figure 17 The modulated signal (time slot) 1701_1 sent to the first terminal sends a frame containing data codewords to the terminal #1 of 4602_1.

[0813] In this case, Figure 53 The "information related to allocation of frames containing data codewords of the first frequency" 5301 includes "information indicating that a frame containing data codewords is transmitted using the modulation signal (time slot) 1701_1 sent to the first terminal."

[0814] therefore, Figure 46B Terminal #1 of 4602_1 can know the position of the frame containing data symbols sent by base station #1 of 4601_1 to terminal #1 of 4602_1 by obtaining "information related to allocation of frames containing data symbols of the first frequency" 5301. Figure 46B Terminal #1 of 4602_1 can receive the modulated signal of the first frequency (band) sent by base station #1 of 4601_1 and obtain the data contained in the data codeword.

[0815] In addition, the base station #1 of 4601_1 sends Figure 50A The method of constructing a frame containing data symbols is not limited to Figure 17 . Figure 50A Other methods of constructing a frame containing data codewords include, for example, the methods described in embodiments 1 to 5.

[0816] In addition, Figure 46BThe frame B1 of 5011_1 sent by base station #2 of 4601_2 using the second frequency (band) not only contains information about the position of the data codewords, but also may contain information related to the error correction coding method used to generate the data codewords, information about the transmission method used to generate the data codewords, information about the modulation method used to generate the data codewords, etc.

[0817] Therefore, if Figure 50A As shown, Figure 46B The base station #1 of 4601_1 sends a signal containing Figure 46B "Frame 1003 containing data codewords" of data codewords sent to terminal #1 of 4602_1.

[0818] right Figure 52 The operation when the "terminal request information for executing / not executing the first frequency transmission" 5202 indicates "not executing" will be described.

[0819] In the case of 5202 indicating "not implemented", Figure 46B Terminal #1 of 4602_1 does not send the modulation signal of the first frequency (band).

[0820] Therefore, when terminal #1 of 4602_1 needs to transmit data to base station #2 of 4601_2, terminal #1 of 4602_1 transmits a modulated signal of the second frequency (band), for example.

[0821] Furthermore, terminal #1 of 4602_1 may also transmit a modulated signal of a third frequency band to another base station. In this case, the third frequency band is a frequency band different from the first frequency band, and furthermore, the third frequency band is a frequency band different from the second frequency band.

[0822] right Figure 52 The operation when the "terminal request information for executing / not executing the first frequency transmission" 5202 indicates "execution" will be described.

[0823] In the case of 5202 indicating "implementation", Figure 46B Terminal #1 of 4602_1 sends a modulated signal of the first frequency (band).

[0824] therefore, Figure 46B Terminal #1 at 4602_1 needs to transmit a signal for sector scanning. Specifically, terminal #1 at 4602_1 transmits a signal for sector scanning to determine the antenna and beamforming parameters used by terminal #1 and to determine the antenna and beamforming parameters used by base station #1 at 4601_1 for reception.

[0825] Figure 54 Shown Figure 46BThis is an example of a case where terminal #1 of 4602_1 sends a sector scan signal. Figure 54 In the Figure 13 The same reference numerals are attached to parts that operate in the same manner.

[0826] For example, in Figure 50A 、 Figure 50B 、 Figure 50C In the time interval from time t1 to time t2, Figure 46B Terminal #1 of 4602_1 transmits a reference signal for sector scanning using the first frequency (band). The detailed method has been described in Embodiments 1 to 5, etc., and will therefore be briefly described here.

[0827] like Figure 54 As shown, Figure 46B Terminal #1 of 4602_1 transmits sector scanning reference signal 5401_1 in "1st terminal 'sector scanning reference signal' transmission interval" 1301_1. Figure 46B Base station #1 at 4601_1 receives sector scanning reference signal 5401_1 and, for example, transmits a modulated signal to terminal #1 at 4602_1. This determines "the antenna and beamforming parameters used by terminal #1 at 4602_1 for transmission, and the antenna and beamforming parameters used by base station #1 at 4601_1 for reception." Details have been described in Embodiments 1 to 5, and are therefore omitted.

[0828] Furthermore, the above description states that “in Figure 50A 、 Figure 50B 、 Figure 50C In the time interval from time t1 to time t2, Figure 46B Terminal #1 of 4602_1 uses the first frequency (band) to send a reference signal for sector scanning", but " Figure 46B The time interval in which terminal #1 of 4602_1 transmits a reference signal for sector scanning using the first frequency (band) is not limited to this time interval.

[0829] For example, Figure 46B Terminal #1 of 4602_1 can use the first frequency (band) to send a reference signal for sector scanning in the terminal response interval of other time periods, and can also send a reference signal for sector scanning in the interval of sending data code elements.

[0830] Figure 46B After sending a reference signal for sector scanning, terminal #1 of 4602_1 sends a frame containing data codewords to base station #1 of 4601_1.

[0831] Figure 55This is a diagram illustrating an example of a modulation signal of the first frequency transmitted by terminal #1. Figure 55 In the Figure 20 The same reference numerals are attached to parts that operate in the same manner.

[0832] like Figure 55 As shown, Figure 46B Terminal #1 of 4602_1 transmits frame 5501_1 including data symbols in the first time interval of frame 1851_i including data symbols.

[0833] The method of selecting the time interval of the frame of terminal #1 transmitting 4602_1 has been described in Embodiments 1 to 5, etc., and therefore the description thereof is omitted.

[0834] exist Figure 46B In the communication system described above, base station #1 in 4601_1 and base station #2 in 4601_2 operate in conjunction with each other. Therefore, base stations #1 in 4601_1 and #2 in 4601_2 communicate to exchange information, implementing timing control and data sharing associated with the coordination. This communication can be either wired or wireless.

[0835] In addition, in the above description, the base station #1 of 4601_1 sends Figure 50A In frame 1003 containing data symbols, base station #1 of 4601_1 may also use a transmission method that uses multiple antennas to transmit multiple modulated signals. This has been described in detail in Embodiments 1 to 5.

[0836] In addition, the terminal #1 of 4602_1 sends Figure 50B In the frame T1 of 5001_1, the terminal #1 of 4602_1 can also use a transmission method of transmitting multiple modulated signals using multiple antennas. Figure 50C In frame B1 of 5011_1, base station #2 of 4601_2 may also use a transmission method of transmitting multiple modulated signals using multiple antennas.

[0837] Furthermore, when base station #2 in 4601_2 transmits a modulated signal using the second frequency (band), it may also use a method of transmitting multiple modulated signals using multiple antennas. Furthermore, when terminal #1 in 4602_1 transmits a modulated signal using the first frequency (band), it may also use a method of transmitting multiple modulated signals using multiple antennas.

[0838] right Figure 46A and Figure 46B A modification of the communication system shown will be described.

[0839] Figure 56A It shows Figure 46A A diagram of a modified example of a communication system. Figure 56B It shows Figure 46B FIG. 1 is a diagram showing a modified example of a communication system. Figure 56A and Figure 56B In the Figure 46A and Figure 46B The same reference numerals are attached to parts that operate in the same manner.

[0840] Figure 56A and Figure 46A The difference is that the base station 4601_0 uses the first frequency (band) to communicate with the terminal #2 of 5602_1.

[0841] in addition, Figure 56B and Figure 46B The difference is that the base station #1 of 4601_1 uses the first frequency (band) to communicate with the terminal #2 of 5602_1.

[0842] Figure 57 is shown with Figure 50A 、 Figure 50B 、 Figure 50C A diagram showing an example of different delivery conditions. Figure 58 It shows Figure 57 This figure shows an example of the subsequent sending status.

[0843] In addition, Figure 57 In the Figure 18 The same reference numerals are attached to the parts that perform the same operations, and the description thereof is omitted. Figure 58 In the Figure 19 The same reference numerals are attached to the parts that perform the same operations, and the description thereof is omitted. Figure 57 and Figure 58 In the Figure 50B 、 Figure 50C The same reference numerals are attached to the parts that perform the same operations, and the description thereof is omitted. Figure 57 and Figure 58 The horizontal axis shown is time.

[0844] Figure 57 (A) shows Figure 56A An example of the transmission status of the modulation signal of the first frequency (band) transmitted by the base station 4601_0, or Figure 56B An example of the transmission status of the modulated signal of the first frequency (band) transmitted by base station #1 of 4601_1.

[0845] Figure 57 (B) shows Figure 56A 、 Figure 56BAn example of the transmission status of the modulated signal of the first frequency (band) sent by terminal #2 of 5602_1.

[0846] Figure 57 (C) shows Figure 56A 、 Figure 56B An example of the transmission status of the modulated signal of the first frequency (band) sent by terminal #1 of 4602_1.

[0847] Figure 57 (D) shows Figure 56A An example of the transmission status of the modulated signal of the second frequency (band) transmitted by the base station 4601_0, or Figure 56B An example of the transmission status of the modulated signal of the second frequency (band) sent by base station #2 of 4601_2.

[0848] Figure 58 (A) shows Figure 56A An example of the transmission status of the modulation signal of the first frequency (band) transmitted by the base station 4601_0, or Figure 56B An example of the transmission status of the modulated signal of the first frequency (band) transmitted by base station #1 of 4601_1.

[0849] Figure 58 (B) shows Figure 56A and Figure 56B An example of the transmission status of the modulated signal of the first frequency (band) sent by terminal #2 of 5602_1.

[0850] Figure 58 (C) shows Figure 56A and Figure 56B An example of the transmission status of the modulated signal of the first frequency (band) sent by terminal #1 of 4602_1.

[0851] Figure 58 (D) shows Figure 56A An example of the transmission status of the modulated signal of the second frequency (band) transmitted by the base station 4601_0, or Figure 56B An example of the transmission status of the modulated signal of the second frequency (band) sent by base station #2 of 4601_2.

[0852] and, Figure 58 (A) continues in time from Figure 57 (A) Figure 56A The transmission status of the modulation signal of the first frequency (band) transmitted by the base station 4601_0, or Figure 56B The transmission status of the modulated signal of the first frequency (band) sent by base station #1 of 4601_1.

[0853] Figure 58(B) continues in time from Figure 57 (B) Figure 56A and Figure 56B The transmission status of the modulated signal of the first frequency (band) sent by terminal #2 of 5602_1.

[0854] right Figure 56A The operation example of the communication system shown in FIG.

[0855] like Figure 57 As shown in (A), Figure 56A Base station 4601_0 transmits sector scanning reference signal 1801_1. Terminal #1 of 4602_1 and terminal #2 of 5602_1 receive sector scanning reference signal 1801_1.

[0856] In addition, the specific operation of base station 4601_0 transmitting sector scanning reference signal 1801_1 has been described in embodiments 1 to 5, etc., and therefore the description is omitted.

[0857] In addition, the specific operations of terminal #1 of 4602_1 and terminal #2 of 5602_1 receiving sector scanning reference signal 1801_1 have been described in Embodiments 1 to 5, and therefore, the description thereof is omitted.

[0858] like Figure 57 As shown in (B), termi...

Claims

1. A wireless communication device for communicating with a first transceiver point (TRP) and a second transceiver point, comprising: A receiver receives a plurality of first reference signals whose directivities are controlled by a first TRP in a first period in a time division manner; circuitry for selecting a beam from among a plurality of beams used by the first TRP, the selected beam being determined based on a first reference signal sent from the first TRP; as well as a transmitter that transmits a plurality of second reference signals including information related to the selected beam to the second TRP in a time-division manner during a second period, Information associated with the selected beam is transmitted using discrete Fourier transform spread orthogonal frequency division multiplexing (DFT-SOFDM), The first reference signal includes information indicating the number of time intervals included in the second period. The transmitter determines the time intervals for transmitting the plurality of second reference signals based on the number of time intervals included in the first reference signal.

2. The wireless communication device according to claim 1, wherein: Information related to the multiple beams is sent from the second TRP.

3. The wireless communication device according to claim 1, wherein: The transmitter uses a random number to determine a time interval for transmitting the plurality of second reference signals.

4. The wireless communication device according to claim 1, wherein: In the event of communication failure with the first TRP, information related to the selected beam is sent.

5. A method of communicating with a first transceiver point (TRP) and a second transceiver point, comprising: receiving a plurality of first reference signals whose directivities are controlled by a first TRP in a first period in a time division manner; Selecting a beam from among a plurality of beams used by the first TRP, the selected beam being determined based on a first reference signal sent from the first TRP; as well as sending a plurality of second reference signals including information related to the selected beam to the second TRP in a time division manner during a second period, Information associated with the selected beam is transmitted using discrete Fourier transform spread orthogonal frequency division multiplexing (DFT-SOFDM), The first reference signal includes information indicating the number of time intervals included in the second period. The time intervals for transmitting the plurality of second reference signals are determined based on the number of time intervals included in the first reference signal.

6. The communication method according to claim 5, wherein: Information related to the multiple beams is sent from the second TRP.

7. The communication method according to claim 5, wherein: A random number is used to determine a time interval for transmitting the plurality of second reference signals.

8. The communication method according to claim 5, wherein: In the event of communication failure with the first TRP, information related to the selected beam is sent.

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