Communication device and communication method

Abstract

The invention provides a communication apparatus and a communication method. A communication device is provided with: a first access point that, during operation, communicates with one or more terminals in a first communication scheme; a second access point that, when operated, communicates with the server in a second communication system; a storage device; and a processor that, during operation, receives first transfer data via the first access point, stores the first transfer data in the storage device, and transmits the first transfer data stored in the storage device to the server via the second access point in a first mode, and, during operation, transmits the first transfer data to the server via the second access point in a second mode, stores the first transfer data in the storage device, and transmits the second transfer data to the server via the second access point. The second access point receives second transmission data via the first access point, and transmits the second transmission data to the server via the second access point without storing the second transmission data in the storage device.

Description

[0001] This application is a divisional of an invention patent application filed on October 24, 2018, with application number 201880068192.6 and invention name “Communication system and communication method”. Technical Field

[0002] The present invention relates to a communication system and a communication method. Background Art

[0003] In the past, as a communication method using multiple antennas, there is a communication method called MIMO (Multiple-Input Multiple-Out). In multi-antenna communication represented by MIMO, multiple streams of transmission data are modulated, and each modulated signal is simultaneously transmitted from different antennas at the same frequency (common frequency), thereby improving the reception quality of data and / or improving the communication speed of data (per unit time).

[0004] Furthermore, in multi-antenna communication, when performing multicast / broadcast communication, a transmitting device may use a pseudo-omnidirectional antenna having a substantially constant antenna gain in a wide range of directions in space. For example, Patent Document 1 describes that a transmitting device transmits a modulated signal using a pseudo-omnidirectional antenna.

[0005] Furthermore, even if the transmission speed is increased in wireless communication, if the surrounding network is slow, it is necessary to construct a system for utilizing the increased speed.

[0006] (Prior art literature)

[0007] (Patent Document)

[0008] Patent Document 1 International Publication No. 2011 / 055536

[0009] When a communication method such as a communication method using multiple antennas is adopted, there is a demand for further performance improvement of the entire system or a new service form. Summary of the invention

[0010] A communication device according to one aspect of the present disclosure includes: a first access point that communicates with one or more terminals according to a first communication method when in operation; a second access point that communicates with a server according to a second communication method when in operation; a storage device; and a processor that, when in operation, receives first transmission data via the first access point in a first mode, stores the first transmission data in the storage device, and sends the first transmission data stored in the storage device to the server via the second access point; and receives second transmission data via the first access point in a second mode, does not store the second transmission data in the storage device, but sends the second transmission data to the server via the second access point.

[0011] The present disclosure may facilitate performance improvements in communication systems or support for new service forms. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a diagram showing an example of the structure of a base station.

[0013] Figure 2 This is a diagram showing an example of the configuration of an antenna unit of a base station.

[0014] Figure 3 This is a diagram showing an example of the structure of a base station.

[0015] Figure 4 It is a diagram showing an example of the structure of a terminal.

[0016] Figure 5 This is a diagram showing an example of the structure of an antenna unit of a terminal.

[0017] Figure 6 The diagram is a diagram showing an example of the structure of a terminal.

[0018] Figure 7 This is a diagram showing an example of a communication state between a base station and a terminal.

[0019] Figure 8 This is a diagram for explaining the relationship between multiple flows.

[0020] Fig. 9 is a diagram showing an example of a frame structure.

[0021] Fig.10 is a diagram showing an example of a frame structure.

[0022] Fig.11 is a diagram showing an example of a symbol structure.

[0023] Fig.12This is a diagram showing an example of a communication state between a base station and a terminal.

[0024] Fig.13 is a diagram showing the relationship between a plurality of modulation signals.

[0025] Fig.14 is a diagram showing an example of a frame structure.

[0026] Fig.15 is a diagram showing an example of a frame structure.

[0027] Fig.16 is a diagram showing an example of a symbol structure.

[0028] Fig.17 This is a diagram showing an example of a communication state between a base station and a terminal.

[0029] Fig.18 This is a diagram showing an example of a communication state between a base station and a terminal.

[0030] Fig.19 This is a diagram showing an example of a communication state between a base station and a terminal.

[0031] Fig. 20 This is a diagram showing an example of a communication state between a base station and a terminal.

[0032] Fig.21 is a diagram showing the relationship between a plurality of modulation signals.

[0033] Fig. 22 This is a diagram showing an example of a communication state between a base station and a terminal.

[0034] Fig.23 The diagram shows the order in which a base station and a terminal communicate with each other.

[0035] Fig.24 This is a diagram showing an example of codewords transmitted by a base station and a terminal.

[0036] Fig.25 This is a diagram showing an example of codewords transmitted by a base station.

[0037] Fig.26 This is a diagram showing an example of a communication state between a base station and a terminal.

[0038] Fig. 27 This is a diagram showing an example of codewords transmitted by a base station.

[0039] Fig.28 The diagram shows the order in which a base station and a terminal communicate with each other.

[0040] Fig.29This is a diagram showing an example of a communication state between a base station and a terminal.

[0041] Fig.30 The diagram shows the order in which a base station and a terminal communicate with each other.

[0042] Fig.31 This is a diagram showing an example of codewords transmitted by a base station.

[0043] Fig.32 This is a diagram showing an example of codewords transmitted by a base station.

[0044] Fig.33 The diagram shows the order in which a base station and a terminal communicate with each other.

[0045] Fig.34 It is a sequence diagram showing the communication between a base station and a terminal.

[0046] Fig.35 This is a diagram showing an example of codewords transmitted by a base station.

[0047] Fig.36 The diagram shows the order in which a base station and a terminal communicate with each other.

[0048] Fig.37 This is a diagram showing an example of the structure of a base station.

[0049] Fig.38 is a diagram showing an example of a frame structure.

[0050] Fig.39 is a diagram showing an example of a frame structure.

[0051] Fig.40 is a diagram showing an example of a frame structure.

[0052] Fig.41 is a diagram showing an example of a frame structure.

[0053] Fig.42 This is a diagram showing an example of allocation of symbol areas to terminals.

[0054] Fig.43 This is a diagram showing an example of allocation of symbol areas to terminals.

[0055] Fig.44 This is a diagram showing an example of the structure of a base station.

[0056] Fig.45 An example is shown in which data held by a communication device is transmitted to a plurality of communication devices.

[0057] Fig.46 An example of a frequency spectrum is shown.

[0058] Fig.47 An example of the positional relationship between the communication devices is shown.

[0059] Fig.48 Another example of the positional relationship between the communication devices is shown.

[0060] Fig.49 Another example of the positional relationship between the communication devices is shown.

[0061] Fig.50 Another example of the positional relationship between the communication devices is shown.

[0062] Fig.51 An example of a frame structure of a modulated signal transmitted by a communication device is shown.

[0063] Fig.52 Another example of the frame structure of the modulated signal transmitted by the communication device is shown.

[0064] Fig.53 A configuration example of a communication device is shown.

[0065] Fig.54 An example of how communication between communication devices may look like is shown.

[0066] Fig.55 An example of the order in which each communication device performs communication is shown.

[0067] Fig.56 Another example of the order in which each communication device performs communication is shown.

[0068] Fig.57 A configuration example of a communication device and a power transmission device is shown.

[0069] Fig.58 An example of the configuration of the device is shown.

[0070] Fig.59 An example of the sequence in which each device communicates is shown.

[0071] Fig.60 The sequence for communication between the device and the server is shown.

[0072] Fig.61 This is a diagram for explaining the problem regarding the arrangement of communication antennas.

[0073] Fig.62 An example of the arrangement of communication antennas is shown.

[0074] Fig.63 Another example of arrangement of the communication antenna is shown.

[0075] Fig.64 Another example of arrangement of the communication antenna is shown.

[0076] Fig.65 Another example of arrangement of the communication antenna is shown.

[0077] Fig.66 Another example of arrangement of the communication antenna is shown.

[0078] Fig.67 Another example of arrangement of the communication antenna is shown.

[0079] Fig.68 Another example of arrangement of the communication antenna is shown.

[0080] Fig.69 This is a diagram for explaining the principle of line scan sampling.

[0081] Fig.70 An example of a captured image when the exposure time is long is shown.

[0082] Fig.71 An example of a captured image when the exposure time is short is shown.

[0083] Fig.72A This is a diagram for explaining 4PPM.

[0084] Fig.72B This is a diagram illustrating the Manchester encoding method.

[0085] Fig.73 An example of the configuration of a visible light communication system is shown.

[0086] Fig.74 A configuration example of another communication system that performs optical communication is shown. DETAILED DESCRIPTION

[0087] (Implementation Method 1)

[0088] Figure 1 An example of the configuration of a base station (or access point, etc.) according to this embodiment is shown.

[0089] 101-1 indicates information #1, 101-2 indicates information #2, ..., 101-M indicates information #M. 101-i indicates information #i. i is an integer greater than 1 and less than M. M is an integer greater than 2. It is not necessary that all information #1 to information #M exist.

[0090] The signal processing unit 102 receives the #1 information 101-1, the #2 information 101-2, ..., the #M information 101-M, and the control signal 159 as input. The signal processing unit 102 performs signal processing based on information such as "information on the error correction coding method (coding rate, code length (block length))", "information on the modulation method", "information on the precoding", "transmission method (multiplexing method)", "multicast transmission / unicast transmission (multicast transmission and unicast transmission can also be realized at the same time)", "number of transmission streams when multicast is performed", "transmission method when transmitting a modulated signal for multicast (this point will be described in detail later)" contained in the control signal 159, and outputs the signal processed signal 103-1, the signal processed signal 103-2, ..., the signal processed signal 103-M, that is, the signal processed signal 103-i. In addition, it is not necessary for all the signal processed signals #1 to #M to exist. At this time, error correction coding is performed on the #i information 101-i, and then mapping is performed based on the set modulation method, thereby obtaining a baseband signal.

[0091] Then, baseband signals corresponding to the respective information are collected and precoded. Also, for example, OFDM (Orthogonal Frequency Division Multiplexing) may be applied.

[0092] The wireless unit 104-1 receives the processed signal 103-1 and the control signal 159 as input, performs band limitation, frequency conversion, amplification and other processing based on the control signal 159, and outputs a transmission signal 105-1. The transmission signal 105-1 is output as a radio wave from the antenna unit 106-1.

[0093] Similarly, the wireless unit 104-2 receives the signal 103-2 after signal processing and the control signal 159 as input, performs band limitation, frequency conversion, amplification and other processing based on the control signal 159, and outputs a transmission signal 105-2. And, the transmission signal 105-2 is output from the antenna unit 106-2 as a radio wave. The description of the wireless unit 104-3 to the wireless unit 104-(M-1) is omitted.

[0094] The wireless unit 104-M receives the processed signal 103-M and the control signal 159 as input, performs band limitation, frequency conversion, amplification and other processing based on the control signal 159, and outputs a transmission signal 105-M. The transmission signal 105-M is output from the antenna unit 106-M as radio waves.

[0095] In addition, when each wireless unit does not have a signal after signal processing, the above-mentioned processing does not need to be performed.

[0096] The wireless unit group 153 takes the reception signal group 152 received by the reception antenna group 151 as input, performs processing such as frequency conversion, and outputs a baseband signal group 154 ​​.

[0097] The signal processing unit 155 receives the baseband signal group 154 ​​and performs demodulation and error correction decoding, that is, it also performs time synchronization, frequency synchronization, channel estimation and other processing. At this time, since the signal processing unit 155 receives and processes the modulated signals sent by more than one terminal, it obtains the data sent by each terminal and the control information sent by each terminal. Therefore, the signal processing unit 155 outputs the data group 156 corresponding to more than one terminal and the control information group 157 corresponding to more than one terminal.

[0098] The setting unit 158 ​​takes the control information group 157 and the setting signal 160 as input, and based on the control information group 157, determines the "error correction coding method (coding rate, code length (block length))", "modulation method", "precoding method", "transmission method", "antenna settings", "whether to perform multicast transmission / or unicast transmission (multicast and unicast transmission can also be achieved simultaneously)", "number of transmission streams when performing multicast", "transmission method when sending a modulated signal for multicast", etc., and outputs a control signal 159 containing information on these decisions.

[0099] The antenna units 106-1, 106-2, ..., 106-M take the control signal 159 as input. Figure 2 The work at this time is explained.

[0100] Figure 2 FIG. 1 shows an example of the structure of antenna units 106-1, 106-2, ..., 106-M. Figure 2 As shown, multiple antennas are provided. Figure 2 Although four antennas are depicted in the figure, each antenna unit only needs to include a plurality of antennas. In addition, the number of antennas is not limited to four.

[0101] Figure 2 : is the structure of the antenna unit 106-i. i is an integer greater than or equal to 1 and less than or equal to M.

[0102] The distribution unit 202 sends a signal 201 (equivalent to Figure 1 The transmission signal 105-i) is input, the transmission signal 201 is distributed, and the output signals are 203-1, 203-2, 203-3, and 203-4.

[0103] The multiplication unit 204-1 uses the signal 203-1 and the control signal 200 (equivalent to Figure 1The control signal 159 of the control signal 200 is input, and based on the information of the multiplication coefficient contained in the control signal 200, the signal 203-1 is multiplied by the coefficient W1, and the multiplied signal 205-1 is output. In addition, the coefficient W1 is defined by a complex number. Therefore, W1 can be a real number. Therefore, if the signal 203-1 is v1(t), the multiplied signal 205-1 can be expressed as W1×v1(t) (t is time). And the multiplied signal 205-1 is output as a radio wave from the antenna 206-1.

[0104] Similarly, the multiplication unit 204-2 takes the signal 203-2 and the control signal 200 as input, multiplies the signal 203-2 by the coefficient W2 based on the information of the multiplication coefficient contained in the control signal 200, and outputs the signal 205-2 after the multiplication operation. In addition, the coefficient W2 is defined by a complex number. Therefore, W2 can take a real number. Therefore, if the signal 203-2 is v2(t), the signal 205-2 after the multiplication operation can be expressed as W2×v2(t) (t is time). And the signal 205-2 after the multiplication operation is output from the antenna 206-2 as a radio wave.

[0105] The multiplication unit 204-3 takes the signal 203-3 and the control signal 200 as input, multiplies the signal 203-3 by the coefficient W3 based on the information of the multiplication coefficient contained in the control signal 200, and outputs the signal 205-3 after the multiplication operation. In addition, the coefficient W3 is defined by a complex number. Therefore, W3 can take a real number. Therefore, if the signal 203-3 is v3(t), the signal 205-3 after the multiplication operation can be expressed as W3×v3(t) (t is time). And the signal 205-3 after the multiplication operation is output from the antenna 206-3 as a radio wave.

[0106] The multiplication unit 204-4 takes the signal 203-4 and the control signal 200 as input, multiplies the signal 203-4 by the coefficient W4 based on the information of the multiplication coefficient contained in the control signal 200, and outputs the signal 205-4 after the multiplication operation. In addition, the coefficient W4 is defined by a complex number. Therefore, W4 can take a real number. Therefore, if the signal 203-4 is v4(t), the signal 205-4 after the multiplication operation can be expressed as W4×v4(t) (t is time). And the signal 205-4 after the multiplication operation is output from the antenna 206-4 as a radio wave.

[0107] In addition, the absolute value of W1, the absolute value of W2, the absolute value of W3, and the absolute value of W4 may be equal.

[0108] Figure 3 This embodiment shows Figure 1 The structure of the base station is different from that of the base station. Figure 3 Targeting and Figure 1The same operations are assigned the same reference numerals and their description is omitted below.

[0109] The weighted synthesis unit 301 takes the modulation signal 105-1, the modulation signal 105-2, ... the modulation signal 105-M, and the control signal 159 as input. And the weighted synthesis unit 301 performs weighted synthesis on the modulation signal 105-1, the modulation signal 105-2, ... the modulation signal 105-M based on the information related to the weighted synthesis contained in the control signal 159, and outputs the weighted synthesized signals 302-1, 302-2, ... 302-K. K is an integer greater than 1. And the weighted synthesized signal 302-1 is output from the antenna 303-1 as a radio wave, the weighted synthesized signal 302-2 is output from the antenna 303-2 as a radio wave, ..., and the weighted synthesized signal 302-K is output from the antenna 303-K as a radio wave.

[0110] The weighted combined signal yi(t) 302-i (i is an integer greater than or equal to 1 and less than or equal to K) is expressed as follows (t is time).

[0111] [Formula 1]

[0112]

[0113] In addition, in formula (1), A ij is a value that can be defined using a complex number, so A ij You can take real numbers, x j (t) is the modulation signal 105-j. j is an integer greater than 1 and less than M.

[0114] Figure 4 An example of the configuration of the terminal is shown. Antenna units 401-1, 401-2, ..., 401-N receive a control signal 410 as input. N is an integer greater than or equal to 1.

[0115] The wireless unit 403-1 receives the reception signal 402-1 received by the antenna unit 401-1 and the control signal 410 as input, performs processing such as frequency conversion on the reception signal 402-1 based on the control signal 410, and outputs a baseband signal 404-1.

[0116] Similarly, the wireless unit 403-2 receives the reception signal 402-2 received by the antenna unit 401-2 and the control signal 410 as input, performs frequency conversion and other processing on the reception signal 402-2 based on the control signal 410, and outputs a baseband signal 404-2. In addition, the description of the wireless unit 403-3 to the wireless unit 403-(N-1) is omitted.

[0117] The wireless unit 403-N receives the reception signal 402-N received by the antenna unit 401-N and the control signal 410 as input, performs frequency conversion and other processing on the reception signal 402-N based on the control signal, and outputs a baseband signal 404-N.

[0118] However, not all of the radio units 403-1, 403-2, ..., 403-N need to operate, and therefore, the baseband signals 404-1, 404-2, ..., 404-N do not necessarily all exist.

[0119] The signal processing unit 405 receives the baseband signals 404-1, 404-2, ..., 404-N and the control signal 410 as input, performs demodulation and error correction decoding based on the control signal 410, and outputs data 406, transmission control information 407, and control information 408. That is, the signal processing unit 405 also performs time synchronization, frequency synchronization, channel estimation, and other processing.

[0120] The setting unit 409 takes the control information 408 as input, performs settings regarding the receiving method, and outputs a control signal 410 .

[0121] The signal processing unit 452 takes the information 451 and the transmission control information 407 as input, performs processing such as error correction coding and mapping based on the set modulation method, and outputs a baseband signal group 453.

[0122] The wireless unit group 454 takes the baseband signal group 453 as input, performs processing such as band limitation, frequency conversion, and amplification, and outputs a transmission signal group 455, which is output from the transmission antenna group 456 as a radio wave.

[0123] Figure 5 An example of the structure of antenna units 401-1, 401-2, ..., 401-N is shown. Each antenna unit has Figure 5 In addition, Figure 5 Although four antennas are shown, each antenna unit may include a plurality of antennas. The number of antennas in the antenna unit is not limited to four.

[0124] Figure 5 This is the structure of the antenna unit 401-i. i is an integer greater than or equal to 1 and less than or equal to N.

[0125] The multiplication unit 503-1 uses the reception signal 502-1 received by the antenna 501-1 and the control signal 500 (equivalent to Figure 4The control signal 410 of the control signal 500 is input, and based on the information of the multiplication coefficient contained in the control signal 500, the received signal 502-1 is multiplied by the coefficient D1, and the multiplied signal 504-1 is output. In addition, the coefficient D1 can be defined by a complex number. Therefore, D1 can be a real number. Therefore, if the received signal 502-1 is e1(t), the multiplied signal 504-1 can be expressed as D1×e1(t) (t is time).

[0126] Similarly, the multiplication unit 503-2 takes the received signal 502-2 received by the antenna 501-2 and the control signal 500 as input, multiplies the received signal 502-2 by the coefficient D2 based on the information of the multiplication coefficient included in the control signal 500, and outputs the multiplied signal 504-2. In addition, the coefficient D2 can be defined by a complex number. Therefore, D2 can be a real number. Therefore, if the received signal 502-2 is e2(t), the multiplied signal 504-2 can be expressed as D2×e2(t) (t is time).

[0127] The multiplication unit 503-3 takes the received signal 502-3 received by the antenna 501-3 and the control signal 500 as input, multiplies the received signal 502-3 by the coefficient D3 based on the information of the multiplication coefficient included in the control signal 500, and outputs the multiplied signal 504-3. In addition, the coefficient D3 can be defined by a complex number. Therefore, D3 can be a real number. Therefore, if the received signal 502-3 is e3(t), the multiplied signal 504-3 can be expressed as D3×e3(t) (t is time).

[0128] The multiplication unit 503-4 takes the received signal 502-4 received by the antenna 501-4 and the control signal 500 as input, multiplies the received signal 502-4 by the coefficient D4 based on the information of the multiplication coefficient included in the control signal 500, and outputs the signal 504-4 after the multiplication operation. In addition, the coefficient D4 can be defined by a complex number. Therefore, D4 ​​can be a real number. Therefore, if the received signal 502-4 is e4(t), the signal 504-4 after the multiplication operation can be expressed as D4×e4(t) (t is time).

[0129] The synthesizing unit 505 takes the multiplied signals 504-1, 504-2, 504-3, and 504-4 as input, adds the multiplied signals 504-1, 504-2, 504-3, and 504-4, and outputs a synthesized signal 506 (equivalent to Figure 4 Therefore, the synthesized signal 506 is expressed as D1×e1(t)+D2×e2(t)+D3×e3(t)+D4×e4(t).

[0130] Figure 6This embodiment shows Figure 4 The structure of the terminal is different from that of the terminal. Figure 6 In Figure 4 The same operations are assigned the same reference numerals and their description is omitted below.

[0131] The multiplication unit 603-1 takes the received signal 602-1 received by the antenna 601-1 and the control signal 410 as input, multiplies the received signal 602-1 by the coefficient G1 based on the information of the multiplication coefficient included in the control signal 410, and outputs the multiplied signal 604-1. In addition, the coefficient G1 can be defined by a complex number. Therefore, G1 can be a real number. Therefore, if the received signal 602-1 is c1(t), the multiplied signal 604-1 can be expressed as G1×c1(t) (t is time).

[0132] Similarly, the multiplication unit 603-2 takes the received signal 602-2 received by the antenna 601-2 and the control signal 410 as input, multiplies the received signal 602-2 by the coefficient G2 based on the information of the multiplication coefficient included in the control signal 410, and outputs the signal 604-2 after the multiplication operation. In addition, the coefficient G2 can be defined by a complex number. Therefore, G2 can take a real number. Therefore, if the received signal 602-2 is c2(t), the signal 604-2 after the multiplication operation can be expressed as G2×c2(t) (t is time). The description of the multiplication unit 603-3 to the multiplication unit 603-(L-1) is omitted.

[0133] The multiplication unit 603-L takes the received signal 602-L received by the antenna 601-L and the control signal 410 as input, multiplies the received signal 602-L by the coefficient GL based on the information of the multiplication coefficient included in the control signal 410, and outputs the multiplied signal 604-L. In addition, the coefficient GL can be defined by a complex number. Therefore, GL can be a real number. Therefore, if the received signal 602-L is cL(t), the multiplied signal 604-L can be expressed as GL×cL(t) (t is time).

[0134] Therefore, the multiplication unit 603-i takes the received signal 602-i received by the antenna 601-i and the control signal 410 as input, multiplies the received signal 602-i by the coefficient Gi based on the information of the multiplication coefficient contained in the control signal 410, and outputs the signal 604-i after the multiplication operation. In addition, the coefficient Gi can be defined by a complex number. Therefore, Gi can take a real number. Therefore, if the received signal 602-i is ci(t), the signal 604-i after the multiplication operation can be expressed as Gi×ci(t) (t is time). In addition, i is an integer greater than 1 and less than L, and L is an integer greater than 2.

[0135] Here, the processing unit 605 takes the multiplied signal 604-1, the multiplied signal 604-2, ..., the multiplied signal 604-L and the control signal 410 as input, performs signal processing based on the control signal 410, and outputs processed signals 606-1, 606-2, ..., 606-N. N is an integer greater than 2. In this case, the multiplied signal 604-i is represented as p i (t). i is an integer greater than 1 and less than L. Then, the processed signal 606-j(r j (t)) is represented as follows. (j is an integer greater than 1 and less than N)

[0136] [Formula 2]

[0137]

[0138] In addition, in formula (2), B ji is a value that can be defined using a complex number. Therefore, B ji Can take real numbers.

[0139] Figure 7 An example of the communication status between a base station and a terminal is shown. In addition, a base station is also called an access point, a broadcasting station, etc.

[0140] The base station 700 has a plurality of antennas, and transmits a plurality of transmission signals from a transmission antenna 701. Figure 1 , Figure 3 In the illustrated configuration, precoding (weighted synthesis) is performed in the signal processing unit 102 (and / or the weighted synthesis unit 301), thereby performing transmission beamforming (directivity control).

[0141] and, Figure 7 A transmission beam 702 - 1 for transmitting data of stream 1 , a transmission beam 702 - 2 for transmitting data of stream 1 , and a transmission beam 702 - 3 for transmitting data of stream 1 are shown.

[0142] Figure 7 A transmission beam 703 - 1 for transmitting data of stream 2 , a transmission beam 703 - 2 for transmitting data of stream 2 , and a transmission beam 703 - 3 for transmitting data of stream 2 are shown.

[0143] In addition, Figure 7 Although the number of transmission beams used to transmit data of stream 1 is set to 3 and the number of transmission beams used to transmit data of stream 2 is set to 3, it is not limited thereto, as long as there are multiple transmission beams used to transmit data of stream 1 and multiple transmission beams used to transmit data of stream 2.

[0144] Figure 7The terminals 704-1, 704-2, 704-3, 704-4, and 704-5 are provided, for example, Figure 4 , Figure 5 The terminals have the same structure as shown.

[0145] For example, the terminal 704-1 controls the directivity during reception through the "signal processing unit 405", and / or the "antennas 401-1 to 401-N", and / or the "multiplication units 603-1 to 603-L, and the processing unit 605", thereby forming reception directivity 705-1 and reception directivity 706-1. Furthermore, through the reception directivity 705-1, the terminal 704-1 can receive and demodulate the transmission beam 702-1 for transmitting the data of the stream 1, and through the reception directivity 706-1, the terminal 704-1 can receive and demodulate the transmission beam 703-1 for transmitting the data of the stream 2.

[0146] Similarly, the terminal 704-2 performs directivity control during reception through the "signal processing unit 405", and / or the "antennas 401-1 to 401-N", and / or the "multiplication units 603-1 to 603-L, and the processing unit 605", thereby forming reception directivity 705-2 and reception directivity 706-2. Furthermore, the terminal 704-2 can receive and demodulate the transmission beam 702-1 for transmitting the data of the stream 1 through the reception directivity 705-2, and can receive and demodulate the transmission beam 703-1 for transmitting the data of the stream 2 through the reception directivity 706-2.

[0147] The terminal 704-3 controls the directivity during reception through the "signal processing unit 405" and / or the "antennas 401-1 to 401-N" and / or the "multiplication units 603-1 to 603-L, and the processing unit 605", thereby forming the reception directivity 705-3 and the reception directivity 706-3.

[0148] Furthermore, the terminal 704-3 can receive and demodulate the transmission beam 702-2 for transmitting data of stream 1 through the reception directivity 705-3, and can receive and demodulate the transmission beam 703-2 for transmitting data of stream 2 through the reception directivity 706-3.

[0149] The terminal 704-4 performs directivity control during reception through the "signal processing unit 405", and / or the "antennas 401-1 to 401-N", and / or the "multiplication units 603-1 to 603-L, and the processing unit 605", and forms reception directivity 705-4 and reception directivity 706-4. Furthermore, the terminal 704-4 can receive and demodulate the transmission beam 702-3 for transmitting the data of the stream 1 through the reception directivity 705-4, and can receive and demodulate the transmission beam 703-2 for transmitting the data of the stream 2 through the reception directivity 706-4.

[0150] The terminal 704-5 performs directivity control during reception through the "signal processing unit 405", and / or the "antennas 401-1 to 401-N", and / or the "multiplication units 603-1 to 603-L, and the processing unit 605", and forms reception directivity 705-5 and reception directivity 706-5. Furthermore, the terminal 704-5 can receive and demodulate the transmission beam 702-3 for transmitting the data of the stream 1 through the reception directivity 705-5, and can receive and demodulate the transmission beam 703-3 for transmitting the data of the stream 2 through the reception directivity 706-5.

[0151] exist Figure 7 In the embodiment, the terminal selects at least one transmission beam from among transmission beams 702-1, 702-2, and 702-3 for transmitting data of stream 1 according to the spatial position, and obtains the data of stream 1 with higher quality by using the directivity toward the receiving side. In addition, the terminal selects at least one transmission beam from among transmission beams 703-1, 703-2, and 703-3 for transmitting data of stream 2 according to the spatial position, and obtains the data of stream 2 with higher quality by using the directivity toward the receiving side.

[0152] In addition, the base station 700 transmits the transmission beam 702-1 for transmitting the data of the stream 1 and the transmission beam 703-1 for transmitting the data of the stream 2 using the same frequency (same frequency band) and the same time. Furthermore, the base station 700 transmits the transmission beam 702-2 for transmitting the data of the stream 1 and the transmission beam 703-2 for transmitting the data of the stream 2 using the same frequency (same frequency band) and the same time. Furthermore, the base station 700 transmits the transmission beam 702-3 for transmitting the data of the stream 1 and the transmission beam 703-3 for transmitting the data of the stream 2 using the same frequency (same frequency band) and the same time.

[0153] Furthermore, the transmission beams 702-1, 702-2, and 702-3 used to transmit the data of stream 1 may be beams of the same frequency (same frequency band) or beams of different frequencies (different frequency bands). The transmission beams 703-1, 703-2, and 703-3 used to transmit the data of stream 2 may be beams of the same frequency (same frequency band) or beams of different frequencies (different frequency bands).

[0154] right Figure 1 , Figure 3 The operation of the base station setting unit 158 ​​is explained.

[0155] The setting unit 158 ​​receives the setting signal 160 as input. The setting signal 160 includes information on whether to perform multicast transmission or unicast transmission. Figure 7 In the case of the transmission shown, information of “performing transmission for multicast” is input to the setting unit 158 ​​through the setting signal 160 .

[0156] The setting signal 160 includes information on the number of transmission streams when performing multicast. Figure 7 In the case of transmission as shown, information that “the number of transmission streams is 2” is input to the setting unit 158 ​​through the setting signal 160 .

[0157] Furthermore, the setting signal 160 may also include information on "how many transmission beams are used to transmit each stream". Figure 7 In the case of transmission shown in FIG. 1 , information that “the number of transmission beams of transmission stream 1 is 3, and the number of transmission beams of transmission stream 2 is 3” is input to the setting unit 158 ​​through the setting signal 160 .

[0158] in addition, Figure 1 , Figure 3 The base station may also send a control information symbol including information such as "whether to perform multicast transmission / or unicast transmission", "the number of transmission streams when performing multicast", and "how many transmission beams are used to transmit each stream" in the data symbol. This allows the terminal to perform appropriate reception. The structure of the control information symbol will be described in detail later.

[0159] Figure 8 It is used to illustrate Figure 1 , Figure 3 #i Information 101-i and Use Figure 7The diagram illustrates the relationship between "stream 1" and "stream 2". For example, error correction coding and other processing are performed on information #1 101-1 to obtain error correction coded data. The error correction coded data is named #1 transmission data. Furthermore, the transmission data #1 is mapped to obtain data symbols, and the data symbols are divided into those for stream 1 and stream 2, thereby obtaining data symbols (data symbol groups) for stream 1 and data symbols (data symbol groups) for stream 2. Furthermore, the symbol group of stream 1 includes the data symbols (data symbol groups) of stream 1, and the symbol group of stream 1 is divided from Figure 1 , Figure 3 The symbol group of stream 2 includes the data symbols of stream 2 (data symbol group), and the symbol group of stream 2 is changed from Figure 1 , Figure 3 The base station sends it.

[0160] Fig. 9 An example of a frame structure is shown when the horizontal axis represents time.

[0161] Fig. 9 Symbol group #1 901-1 of stream 1 is Figure 7 A symbol group of transmit beam 702-1 for transmitting data of stream 1.

[0162] Fig. 9 Symbol group #2 901-2 of stream 1 is Figure 7 A symbol group of transmit beam 702-2 for transmitting data of stream 1.

[0163] Fig. 9 Symbol group #3 901-3 of stream 1 is Figure 7 A symbol group of transmit beam 702-3 for transmitting data of stream 1.

[0164] Fig. 9 Symbol group #1 902-1 of stream 2 is Figure 7 A symbol group of transmit beam 703-1 for transmitting data of stream 2.

[0165] Fig. 9 Symbol group #2 902-2 of stream 2 is Figure 7 A symbol group of transmit beam 703-2 for transmitting data of stream 2.

[0166] Fig. 9 Symbol group #3 902-3 of stream 2 is Figure 7 A symbol group of transmit beam 703-3 for transmitting data of stream 2.

[0167] Furthermore, symbol group #1 901-1 of stream 1, symbol group #2 901-2 of stream 1, symbol group #3 901-3 of stream 1, symbol group #1 902-1 of stream 2, symbol group #2 902-2 of stream 2, and symbol group #3 902-3 of stream 2 exist in time interval 1, for example.

[0168] Furthermore, as described above, symbol group #1 901-1 of stream 1 and symbol group #2 902-1 of stream 2 are transmitted at the same frequency (same frequency band), symbol group #2 901-2 of stream 1 and symbol group #2 902-2 of stream 2 are transmitted at the same frequency (same frequency band), and symbol group #3 901-3 of stream 1 and symbol group #3 902-3 of stream 2 are transmitted at the same frequency (same frequency band).

[0169] For example, Figure 8 In the order of , "data symbol group A for stream 1" and "data symbol group A for stream 2" are generated according to the information. Furthermore, a symbol group "data symbol group A-1 for stream 1" is prepared, which is composed of the same symbols as those constituting "data symbol group A for stream 1", a symbol group "data symbol group A-2 for stream 1" is prepared, which is composed of the same symbols as those constituting "data symbol group A for stream 1", and a symbol group "data symbol group A-3 for stream 1" is prepared, which is composed of the same symbols as those constituting "data symbol group A for stream 1".

[0170] That is, the symbols constituting "data symbol group A-1 of stream 1" are the same as the symbols constituting "data symbol group A-2 of stream 1" and the symbols constituting "data symbol group A-3 of stream 1".

[0171] at this time, Fig. 9 The #1 symbol group 901-1 of stream 1 includes "data symbol group A-1 of stream 1". Fig. 9 The #2 symbol group 901-2 of stream 1 includes "data symbol group A-2 of stream 1". Fig. 9 The #3 symbol group 901-3 of stream 1 includes "data symbol group A-3 of stream 1". That is, the #1 symbol group 901-1 of stream 1, the #2 symbol group 901-2 of stream 1, and the #3 symbol group 901-3 of stream 1 include the same data symbol group.

[0172] Furthermore, a symbol group “data symbol group A-1 for stream 2” consisting of the same symbols as those constituting “data symbol group A for stream 2”, a symbol group “data symbol group A-2 for stream 2” consisting of the same symbols as those constituting “data symbol group A for stream 2”, and a symbol group “data symbol group A-3 for stream 2” consisting of the same symbols as those constituting “data symbol group A for stream 2” are prepared.

[0173] That is, the symbols constituting "data symbol group A-1 of stream 2" are the same as the symbols constituting "data symbol group A-2 of stream 2" and the symbols constituting "data symbol group A-3 of stream 2".

[0174] at this time, Fig. 9 The #1 symbol group 902-1 of stream 2 includes "data symbol group A-1 of stream 2". Fig. 9 The #2 symbol group 902-2 of stream 2 includes "data symbol group A-2 of stream 2". Fig. 9 The #3 symbol group 902-3 of stream 2 includes "data symbol group A-3 of stream 2". That is, the #1 symbol group 902-1 of stream 2, the #2 symbol group 902-2 of stream 2, and the #3 symbol group 902-3 of stream 2 include the same data symbol group.

[0175] Fig.10 Shows Fig. 9 An example of the frame structure of "Symbol group #Y of stream X" (X=1, 2; Y=1, 2, 3) is described. Fig.10 In the figure, the horizontal axis is time, 1001 is the control information codeword, and 1002 is the data codeword group of the stream. At this time, the data codeword group 1002 of the stream is used to Fig. 9 The codewords transmitted by the "data codeword group A of stream 1" or the "data codeword group A of stream 2" described above.

[0176] In addition, Fig.10 In the frame structure of the receiver, a multi-carrier method such as OFDM (Orthogonal Frequency Division Multiplexing) can also be used. In this case, code elements can also exist in the frequency axis direction. In addition, each code element can also include a reference code element for the receiving device to perform time and frequency synchronization, a reference code element for the receiving device to detect signals, a reference code element for the receiving device to perform channel estimation, etc. In addition, the frame structure is not limited to Fig.10 Therefore, the control information symbol 1001 and the stream data symbol group 1002 may be arbitrarily arranged. In addition, the reference symbol may also be called a preamble or a pilot symbol.

[0177] Next, the structure of the control information symbol 1001 is described.

[0178] Fig.11 Shown as Fig.10 An example of the structure of a codeword sent as a control information codeword, with the horizontal axis being time. Fig.11In the present invention, the terminal receives the "training code element for receiving directivity control of the terminal" 1101, thereby determining the signal processing method for directivity control during reception, which is performed by the "signal processing unit 405" and / or the "antennas 401-1 to 401-N" and / or the "multiplication units 603-1 to 603-L, and the processing unit 605".

[0179] By receiving the "symbol for notifying the number of transmission streams when performing multicast" 1102, the terminal knows the number of streams that need to be obtained.

[0180] By receiving “the symbol for notifying which stream the data symbol belongs to” 1103 , the terminal can know which stream among the streams transmitted by the base station can be received.

[0181] An example related to the above will be described.

[0182] like Figure 7 As shown in FIG. 1 , the case where the base station transmits the stream and the transmission beam is described. Fig. 9 The specific information of the control information codeword in the #1 codeword group 901-1 of stream 1 is explained.

[0183] exist Figure 7 In the case of , since the base station transmits "stream 1" and "stream 2", the information of "symbol for notifying the number of transmission streams when performing multicast" 1102 is "2".

[0184] And, because Fig. 9 Since the #1 symbol group 901-1 of stream 1 transmits the data symbol of stream 1, the information "which stream's data symbol is the symbol used to pass the stream" 1103 is the information of "stream 1".

[0185] For example, the terminal receives Fig. 9 At this time, the terminal recognizes that "the number of transmission streams is 2" from "the symbol used to notify the number of transmission streams when multicasting" 1102, and "the data symbol of stream 1" from "the symbol used to notify which stream the data symbol group of the stream is" 1103.

[0186] After that, since the terminal recognizes that "the number of transmission streams is 2", the obtained data codeword is "the data codeword of stream 1", so it recognizes that it needs to obtain "the data codeword of stream 2". Therefore, the terminal can start the operation of searching for the codeword group of stream 2. For example, the terminal searches Fig. 9 The transmission beam of one of the #1 code group 902-1 of stream 2, the #2 code group 902-2 of stream 2, and the #3 code group 902-3 of stream 2.

[0187] Then, the terminal obtains data symbols of both stream 1 and stream 2 by obtaining a transmission beam of one of stream 2 #1 symbol group 902-1, stream 2 #2 symbol group 902-2, and stream 2 #3 symbol group 902-3.

[0188] By configuring the control information symbol in this way, it is possible to achieve an effect that the terminal can reliably obtain the data symbol.

[0189] As shown above, in multicast transmission and broadcast data transmission, the data codewords are sent by the base station using multiple transmission beams, and the terminal selectively receives a beam with good quality from the multiple transmission beams. Since the modulated signal sent by the base station performs transmission directivity control and reception directivity control, the effect of expanding the area where higher data reception quality can be obtained is achieved.

[0190] Furthermore, in the above description, it is described that the terminal performs reception directivity control, but the above-mentioned effects can be obtained even if the terminal does not perform reception directivity control.

[0191] in addition, Fig.10 The modulation method of the "data symbol group of the stream" 1002 may be any modulation method, and the mapping method of the modulation method of the "data symbol group of the stream" 1002 may be switched for each symbol. That is, after mapping, the phase of the constellation diagram may be switched for each symbol on the in-phase I-quadrature Q plane.

[0192] Fig.12 Shows the communication status between the base station and the terminal Figure 7 Different examples. In addition, Fig.12 For Figure 7 The same tasks are assigned the same number.

[0193] The base station 700 has a plurality of antennas, and transmits a plurality of transmission signals from a transmission antenna 701. Figure 1 , Figure 3 In the illustrated configuration, transmission beamforming (directivity control) is performed by performing precoding (weighted synthesis) in the signal processing section 102 (and / or the weighted synthesis section 301).

[0194] and, Fig.12 It shows the transmission beam 1202-1 used to transmit "modulation signal 1", the transmission beam 1202-2 used to transmit "modulation signal 1", and the transmission beam 1202-3 used to transmit "modulation signal 1".

[0195] Fig.12It shows the transmission beam 1203-1 used to transmit "modulation signal 2", the transmission beam 1203-2 used to transmit "modulation signal 2", and the transmission beam 1203-3 used to transmit "modulation signal 2".

[0196] In addition, Fig.12 In the example, the number of transmission beams used to transmit "modulation signal 1" is 3, and the number of transmission beams used to transmit "modulation signal 2" is 3, but the present invention is not limited thereto. As long as there are multiple transmission beams used to transmit "modulation signal 1" and multiple transmission beams used to transmit "modulation signal 2", it will be fine. "Modulation signal 1" and "Modulation signal 2" will be described in detail later.

[0197] Fig.12 The terminals 704-1, 704-2, 704-3, 704-4, and 704-5 are provided, for example, Figure 4 , Figure 5 The same structure as the terminal in.

[0198] For example, the terminal 704-1 performs directivity control during reception through the "signal processing unit 405" and / or the "antennas 401-1 to 401-N" and / or the "multiplication units 603-1 to 603-L and the processing unit 605" to form reception directivity 705-1 and reception directivity 706-1. Furthermore, through the reception directivity 705-1, the terminal 704-1 can receive and demodulate the transmission beam 1202-1 used to transmit the "modulation signal 1", and through the reception directivity 706-1, the terminal 704-1 can receive and demodulate the transmission beam 1203-1 used to transmit the "modulation signal 2".

[0199] Similarly, the terminal 704-2 performs directivity control during reception through the "signal processing unit 405" and / or the "antennas 401-1 to 401-N" and / or the "multiplication units 603-1 to 603-L and the processing unit 605" to form reception directivity 705-2 and reception directivity 706-2. Furthermore, through the reception directivity 705-2, the terminal 704-2 can receive and demodulate the transmission beam 1202-1 used to transmit the "modulation signal 1", and through the reception directivity 706-2, the terminal 704-2 can receive and demodulate the transmission beam 1203-1 used to transmit the "modulation signal 2".

[0200] The terminal 704-3 controls the directivity during reception through the "signal processing unit 405" and / or the "antennas 401-1 to 401-N" and / or the "multiplication units 603-1 to 603-L, and the processing unit 605" to form the reception directivity 705-3 and the reception directivity 706-3.

[0201] Furthermore, through the reception directivity 705-3, the terminal 704-3 can receive and demodulate the transmission beam 1202-2 used to transmit the "modulation signal 1", and through the reception directivity 706-3, the terminal 704-3 can receive and demodulate the transmission beam 1203-2 used to transmit the "modulation signal 2".

[0202] The terminal 704-4 controls the directivity during reception through the "signal processing unit 405" and / or the "antennas 401-1 to 401-N" and / or the "multiplication units 603-1 to 603-L and the processing unit 605" to form reception directivity 705-4 and reception directivity 706-4. Furthermore, through the reception directivity 705-4, the terminal 704-4 can receive and demodulate the transmission beam 1202-3 used to transmit the "modulation signal 1", and through the reception directivity 706-4, the terminal 704-4 can receive and demodulate the transmission beam 1203-2 used to transmit the "modulation signal 2".

[0203] The terminal 704-5 performs directivity control during reception through the "signal processing unit 405" and / or the "antennas 401-1 to 401-N" and / or the "multiplication units 603-1 to 603-L and the processing unit 605" to form reception directivity 705-5 and reception directivity 706-5. Furthermore, through the reception directivity 705-5, the terminal 704-5 can receive and demodulate the transmission beam 1202-3 used to transmit the "modulation signal 1", and through the reception directivity 706-5, the terminal 704-5 can receive and demodulate the transmission beam 1203-3 used to transmit the "modulation signal 2".

[0204] Fig.12 The advantage is that the terminal selects at least one transmission beam from the transmission beams 1202-1, 1202-2, and 1202-3 used to transmit the "modulation signal 1" according to the spatial position, and can obtain the "modulation signal 1" with higher quality by using the directivity toward the receiving side. In addition, the terminal selects at least one transmission beam from the transmission beams 1203-1, 1203-2, and 1203-3 used to transmit the "modulation signal 2" according to the spatial position, and can obtain the "modulation signal 2" with higher quality by using the directivity toward the receiving side.

[0205] In addition, the base station 700 transmits the transmission beam 1202-1 used to transmit the "modulation signal 1" and the transmission beam 1203-1 used to transmit the "modulation signal 2" using the same frequency (same frequency band) and the same time. Furthermore, the base station 700 transmits the transmission beam 1202-2 used to transmit the "modulation signal 1" and the transmission beam 1203-2 used to transmit the "modulation signal 2" using the same frequency (same frequency band) and the same time. Furthermore, the base station 700 transmits the transmission beam 1202-3 used to transmit the "modulation signal 1" and the transmission beam 1203-3 used to transmit the "modulation signal 2" using the same frequency (same frequency band) and the same time.

[0206] Furthermore, the transmission beams 1202-1, 1202-2, and 1202-3 used to transmit "modulation signal 1" may be beams of the same frequency (same frequency band) or beams of different frequencies (different frequency bands). The transmission beams 1203-1, 1203-2, and 1203-3 used to transmit "modulation signal 2" may be beams of the same frequency (same frequency band) or beams of different frequencies (different frequency bands).

[0207] right Figure 1 , Figure 3 The operation of the base station setting unit 158 ​​is explained.

[0208] The setting unit 158 ​​receives the setting signal 160 as input. The setting signal 160 includes information on whether to perform multicast transmission or unicast transmission. Fig.12 In the case of the transmission shown, information of “performing transmission for multicast” is input to the setting unit 158 ​​through the setting signal 160 .

[0209] The setting signal 160 includes information on the number of modulation signals to be sent when performing multicast. Fig.12 In the case of transmission shown, the information that “the number of transmitted modulation signals is 2” is input to the setting unit 158 ​​through the setting signal 160 .

[0210] In addition, the setting signal 160 may also include information on "how many transmission beams are used to transmit each modulated signal". Fig.12 In the case of transmission shown, the information that “the number of transmission beams for transmitting the modulated signal 1 is 3, and the number of transmission beams for transmitting the modulated signal 2 is 3” is input to the setting unit 158 ​​through the setting signal 160 .

[0211] in addition, Figure 1 , Figure 3The base station can also send data symbols including information such as "whether to send for multicast / unicast", "the number of transmission modulated signals when performing multicast", "how many transmission beams are used to send each modulated signal", etc. The terminal can perform appropriate reception. The structure of the control information symbol will be described in detail later.

[0212] Fig.13 It is used to illustrate Figure 1 , Figure 3 #i Information 101-i and Use Fig.12 A diagram illustrating the relationship between "Modulation signal 1" and "Modulation signal 2".

[0213] For example, error correction coding and other processing are performed on the #1 information 101-1 to obtain error correction coded data. The error correction coded data is named #1 transmission data. In addition, the #1 transmission data is mapped to obtain data symbols, and the data symbols are divided into stream 1 and stream 2 to obtain data symbols (data symbol groups) for stream 1 and data symbols (data symbol groups) for stream 2. At this time, the data symbol of stream 1 in symbol number i is s1(i), and the data symbol of stream 2 is s2(i). Therefore, the "modulation signal 1" tx1(i) in symbol number i is expressed as follows, for example.

[0214] [Formula 3]

[0215] tx1(i)=α(i)×s1(i)+β(i)×s2(i) Formula (3)

[0216] Furthermore, the "modulated signal 2" tx2(i) in the code element number i is expressed, for example, as follows.

[0217] [Formula 4]

[0218] tx2(i)=γ(i)×s1(i)+δ(i)×s2(i) Formula (4)

[0219] In equation (3) and equation (4), α(i) can be defined by a complex number (and therefore, can also be a real number), β(i) can be defined by a complex number (and therefore, can also be a real number), γ(i) can be defined by a complex number (and therefore, can also be a real number), and δ(i) can be defined by a complex number (and therefore, can also be a real number). Furthermore, although α(i) is expressed, it does not have to be a function of the symbol number i (and can also be a fixed value), although β(i) is expressed, it does not have to be a function of the symbol number i (and can also be a fixed value), although γ(i) is expressed, it does not have to be a function of the symbol number i (and can also be a fixed value), and although δ(i) is expressed, it does not have to be a function of the symbol number i (and can also be a fixed value).

[0220] Furthermore, the "modulation signal 1 symbol group" including the "signal of the data transmission area of ​​the modulation signal 1" composed of data symbols is obtained from Figure 1 , Figure 3 And, the "modulation signal 2 code group" containing the "signal of the data transmission area of ​​the modulation signal 2" composed of data code elements is sent from Figure 1 , Figure 3 The base station sends it.

[0221] In addition, signal processing such as phase change or CDD (Cyclic Delay Diversity) may be performed on "modulation signal 1" and "modulation signal 2." However, the signal processing method is not limited to this.

[0222] Fig.14 An example of a frame structure is shown when the horizontal axis represents time.

[0223] Fig.14 The first symbol group (1401-1) of the modulation signal 1 is Fig.12 The codeword group of the transmitting beam 1202-1 used to transmit the data of the modulated signal 1.

[0224] Fig.14 The #2 symbol group (1401-2) of the modulation signal 1 is Fig.12 The codeword group of the transmitting beam 1202-2 used to transmit the data of the modulated signal 1.

[0225] Fig.14 The symbol group #3 (1401-3) of the modulation signal 1 is Fig.12 The codeword group of the transmitting beam 1202-3 used to transmit the data of the modulated signal 1.

[0226] Fig.14 The first symbol group (1402-1) of the modulation signal 2 is Fig.12 The codeword group of the transmitting beam 1203-1 used to transmit the data of the modulated signal 2.

[0227] Fig.14 The symbol group #2 (1402-2) of the modulation signal 2 is Fig.12 The codeword group of the transmitting beam 1203-2 used to transmit the data of the modulated signal 2.

[0228] Fig.14 The symbol group #3 (1402-3) of the modulation signal 2 is Fig.12 The codeword group of the transmitting beam 1203-3 used to transmit the data of the modulated signal 2.

[0229] Therefore, the #1 code group (1401-1) of modulation signal 1, the #2 code group (1401-2) of modulation signal 1, the #3 code group (1401-3) of modulation signal 1, the #1 code group (1402-1) of modulation signal 2, the #2 code group (1402-2) of modulation signal 2, and the #3 code group (1402-3) of modulation signal 2 exist in time interval 1, for example.

[0230] Furthermore, as previously recorded, the #1 symbol group (1401-1) of modulation signal 1 and the #1 symbol group (1402-1) of modulation signal 2 are transmitted at the same frequency (same frequency band), the #2 symbol group (1401-2) of modulation signal 1 and the #2 symbol group (1402-2) of modulation signal 2 are transmitted at the same frequency (same frequency band), and the #3 symbol group (1401-3) of modulation signal 1 and the #3 symbol group (1402-3) of modulation signal 2 are transmitted at the same frequency (same frequency band).

[0231] For example, Fig.13 In the order of, "Signal A in the data transmission area of ​​modulated signal 1" and "Signal A in the data transmission area of ​​modulated signal 2" are generated according to the information.

[0232] Furthermore, a signal "signal A-1 in the data transmission area of ​​modulated signal 1" is prepared, which is composed of a signal equivalent to the signal constituting "signal A in the data transmission area of ​​modulated signal 1", a signal "signal A-2 in the data transmission area of ​​modulated signal 1" is composed of a signal equivalent to the signal constituting "signal A in the data transmission area of ​​modulated signal 1", and a signal "signal A-3 in the data transmission area of ​​modulated signal 1" is composed of a signal equivalent to the signal constituting "signal A in the data transmission area of ​​modulated signal 1". (That is, the signal constituting "signal group A-1 in the data transmission area of ​​modulated signal 1", the signal constituting "signal A-2 in the data transmission area of ​​modulated signal 1", and the signal constituting "signal A-3 in the data transmission area of ​​modulated signal 1" are the same.)

[0233] at this time, Fig.14 The symbol group #1 (1401-1) of the modulation signal 1 includes "the signal A-1 in the data transmission area of ​​the modulation signal 1". Fig.14 The symbol group #2 (1401-2) of the modulation signal 1 includes "the signal A-2 in the data transmission area of ​​the modulation signal 1". Fig.14 The #3 symbol group (1401-3) of the modulation signal 1 includes "the signal A-3 in the data transmission area of ​​the modulation signal 1". That is, the #1 symbol group (1401-1) of the modulation signal 1, the #2 symbol group (1401-2) of the modulation signal 1, and the #3 symbol group (1401-3) of the modulation signal 1 include the same signals.

[0234] In addition, a signal "Signal A-1 of the data transmission area of ​​modulated signal 2" is prepared, which is composed of a signal equivalent to the signal constituting "Signal A of the data transmission area of ​​modulated signal 2", a signal "Signal A-2 of the data transmission area of ​​modulated signal 2" is composed of a signal equivalent to the signal constituting "Signal A of the data transmission area of ​​modulated signal 2", and a signal "Signal A-3 of the data transmission area of ​​modulated signal 2" is prepared, which is composed of a signal equivalent to the signal constituting "Signal A of the data transmission area of ​​modulated signal 2". (That is, the signal constituting "Signal A-1 of the data transmission area of ​​modulated signal 2", the signal constituting "Signal A-2 of the data transmission area of ​​modulated signal 2", and the signal constituting "Signal A-3 of the data transmission area of ​​modulated signal 2" are the same.)

[0235] at this time, Fig.14 The symbol group #1 (1402-1) of the modulation signal 2 includes "the signal A-1 in the data transmission area of ​​the modulation signal 2". Fig.14 The symbol group #2 (1402-2) of stream 2 includes "signal A-2 in the data transmission area of ​​modulated signal 2". Fig.14 The #3 symbol group (1402-3) of the modulation signal 2 includes "the signal A-3 in the data transmission area of ​​the modulation signal 2". That is, the #1 symbol group (1402-1) of the modulation signal 2, the #2 symbol group (1402-2) of the modulation signal 2, and the #3 symbol group (1402-3) of the modulation signal 2 include the same signals.

[0236] Fig.15 Shows Fig.14 An example of the frame structure of "symbol group #Y of modulation signal X" (X=1, 2; Y=1, 2, 3) is described. Fig.15 In the figure, the horizontal axis is time, 1501 is the control information codeword, and 1502 is the modulation signal transmission area for data transmission. At this time, the modulation signal transmission area 1502 for data transmission is used to transmit the data. Fig.14 The code element of "signal A in the data transmission area of ​​modulated signal 1" or "signal A in the data transmission area of ​​modulated signal 2" is described.

[0237] In addition, Fig.15 In the frame structure of the receiver, a multi-carrier method such as OFDM (Orthogonal Frequency Division Multiplexing) can also be used. In this case, code elements can also exist in the frequency axis direction. In addition, each code element can also include a reference code element for the receiving device to perform time and frequency synchronization, a reference code element for the receiving device to detect signals, and a reference code element for the receiving device to perform channel estimation. In addition, the frame structure is not limited to Fig.15Therefore, the control information symbol 1501 and the modulation signal transmission area 1502 for data transmission can be arbitrarily arranged. The reference symbol may also be called a preamble or a pilot symbol, for example.

[0238] Next, the structure of control information symbol 1501 is described.

[0239] Fig.16 Shown as Fig.15 An example of the structure of a codeword sent as a control information codeword, with the horizontal axis being time. Fig.16 In the figure, 1601 is a "training symbol for terminal to perform reception directivity control". By receiving the "training symbol for terminal to perform reception directivity control" 1601, the terminal determines the signal processing method for directivity control during reception, which is performed by the "signal processing unit 405" and / or the "antennas 401-1 to 401-N" and / or the "multiplication units 603-1 to 603-L, and the processing unit 605".

[0240] 1602 is a “symbol for notifying the number of modulated signals to be transmitted when performing multicast”. By receiving “symbol for notifying the number of modulated signals to be transmitted when performing multicast” 1602, the terminal can know the number of modulated signals to be obtained.

[0241] 1603 is a "code symbol for notifying which modulation signal sending area for data transmission of the modulation signal is the modulation signal sending area for data transmission of the modulation signal". By receiving the "code symbol for notifying which modulation signal sending area for data transmission of the modulation signal is the modulation signal sending area for data transmission of the modulation signal" 1603, the terminal can know which modulation signal among the modulation signals sent by the base station can be received.

[0242] An example related to the above will be described.

[0243] like Fig.12 As shown in FIG. 1 , consider the case where the base station transmits the “modulated signal” and the transmission beam. Fig.14 The specific information of the control information codeword in the #1 codeword group 1401-1 of the modulation signal 1 is explained.

[0244] exist Fig.12 In the case of , since the base station sends "modulation signal 1" and "modulation signal 2", the information of "code element used to notify the number of modulation signals sent during multicast" 1602 is "2".

[0245] And, because Fig.14The #1 codeword group 1401-1 of the modulation signal 1 sends a signal of the data transmission area of ​​the modulation signal 1. Therefore, the information of "the codeword used to notify which modulation signal's data transmission area is the modulation signal transmission area" 1603 is the information of "modulation signal 1".

[0246] For example, suppose the terminal receives Fig.14 At this time, the terminal recognizes "modulation signal number 2" based on "symbol for notifying the number of modulation signals sent during multicast" 1602, and recognizes "modulation signal 1" based on "symbol for notifying which modulation signal data transmission area is used for modulation signal transmission" 1603.

[0247] Therefore, the terminal recognizes that "modulation signal number 2" exists and the obtained modulation signal is "modulation signal 1", so it recognizes that "modulation signal 2" needs to be obtained. Therefore, the terminal can start the operation of searching for "modulation signal 2". For example, the terminal searches Fig.14 The transmitting beam is one of the “#1 symbol group of modulation signal 2” 1402-1, “#2 symbol group of modulation signal 2” 1402-2, and “#3 symbol group of modulation signal 2” 1402-3.

[0248] Furthermore, the terminal obtains both "modulation signal 1" and "modulation signal 2" by obtaining a certain transmission beam of "modulation signal 2 #1 symbol group" 1402-1, "modulation signal 2 #2 symbol group" 1402-2, and "modulation signal 2 #3 symbol group" 1402-3, and can obtain the data codewords of stream 1 and the data codewords of stream 2 with high quality.

[0249] By configuring the control information symbol in this way, it is possible to achieve an effect that the terminal can reliably obtain the data symbol.

[0250] As shown above, in multicast data transmission and broadcast data transmission, the base station transmits data symbols using multiple transmission beams, and the terminal selectively receives beams with good quality from the multiple transmission beams, thereby achieving an effect of increasing the area in which the modulated signal transmitted by the base station can receive high data quality. This is because the base station performs transmission directivity control and reception directivity control.

[0251] Furthermore, in the above description, although it is described that the terminal performs reception directivity control, the above-mentioned effect can be obtained even if the terminal does not perform reception directivity control.

[0252] In addition, Figure 7In the embodiment, although the case where each terminal obtains both the modulated signal of stream 1 and the modulated signal of stream 2 is described, the present invention is not limited to such an embodiment. For example, a terminal that wants to obtain the modulated signal of stream 1, a terminal that wants to obtain the modulated signal of stream 2, or a terminal that wants to obtain both the modulated signal of stream 1 and the modulated signal of stream 2 may be provided, so that different terminals may obtain different modulated signals.

[0253] (Implementation Method 2)

[0254] In Embodiment 1, a method in which a base station transmits data symbols using multiple transmission beams in multicast data transmission and broadcast data transmission is described. In this embodiment, as a variation of Embodiment 1, a case in which a base station performs multicast data transmission and broadcast data transmission and performs unicast data transmission is described.

[0255] Fig.17 An example of the communication status between a base station (or access point, etc.) and a terminal is shown. Figure 7 The same operations are given the same reference numerals and detailed descriptions are omitted.

[0256] The base station 700 has a plurality of antennas, and transmits a plurality of transmission signals from a transmission antenna 701. Figure 1 , Figure 3 In such a configuration, transmission beamforming (directivity control) is performed by performing precoding (weighted synthesis) in the signal processing unit 102 (and / or the weighted synthesis unit 301).

[0257] In addition, the description of the transmission beams 702-1, 702-2, 702-3, 703-1, 703-2, and 703-3 is the same as that of the use Figure 7 The description is the same as that of , and is omitted here.

[0258] In addition, the description of the terminals 704-1, 704-2, 704-3, 704-4, 704-5, and the reception directivities 705-1, 705-2, 705-3, 705-4, 705-5, 706-1, 706-2, 706-3, 706-4, 706-5 is as follows: Figure 7 The description is the same as that of , and is omitted here.

[0259] exist Fig.17 The characteristic feature of the invention is that the base station, for example, Figure 7 Multicast is performed as described above, and the base station 700 and the terminal (for example, 1702) perform unicast communication.

[0260] In addition to the transmission beams 702-1, 702-2, 702-3, 703-1, 703-2, and 703-3 for multicast, the base station 700 also transmits Fig.17 In addition, a transmission beam 1701 for unicast is generated, and data is transmitted to terminal 1702 separately. Fig.17 Although the example shows that the base station 700 sends one transmission beam 1701 to the terminal 1702, the number of transmission beams is not limited to one. The base station 700 can also send multiple transmission beams (and can also send multiple modulated signals) to the terminal 1702.

[0261] Furthermore, the terminal 1702 forms a reception directivity 1703 for directivity control during reception through the "signal processing unit 405" and / or the "antennas 401-1 to 401-N" and / or the "multiplication units 603-1 to 603-L and the signal processing unit 605". Accordingly, the terminal 1702 can receive and demodulate the transmission beam 1701.

[0262] In addition, in order to generate a transmission beam including the transmission beam 1701, the base station, for example, Figure 1 , Figure 3 The signal processing unit 102 (and / or the weighted synthesis unit 301) in the shown configuration performs precoding (weighted synthesis).

[0263] On the contrary, when the terminal 1702 transmits a modulated signal to the base station 700, the terminal 1702 performs precoding (or weighted synthesis) and transmits a transmission beam 1703, and the base station 700 forms a reception directivity 1701 for directivity control during reception. Thus, the base station 700 can receive and demodulate the transmission beam 1703.

[0264] In addition, the base station 700 transmits the transmission beam 702-1 for transmitting the data of the stream 1 and the transmission beam 703-1 for transmitting the data of the stream 2 at the same frequency (same frequency band) and the same time. Furthermore, the base station 700 transmits the transmission beam 702-2 for transmitting the data of the stream 1 and the transmission beam 703-2 for transmitting the data of the stream 2 at the same frequency (same frequency band) and the same time. Furthermore, the base station 700 transmits the transmission beam 702-3 for transmitting the data of the stream 1 and the transmission beam 703-3 for transmitting the data of the stream 2 at the same frequency (same frequency band) and the same time.

[0265] Furthermore, the transmission beams 702-1, 702-2, and 702-3 used to transmit the data of stream 1 may be beams of the same frequency (same frequency band) or beams of different frequencies (different frequency bands). The transmission beams 703-1, 703-2, and 703-3 used to transmit the data of stream 2 may be beams of the same frequency (same frequency band) or beams of different frequencies (different frequency bands).

[0266] Furthermore, the transmission beam 1701 for unicast may be a beam of the same frequency (same frequency band) as the transmission beams 702-1, 702-2, 702-3, 703-1, 703-2, and 703-3, or a beam of a different frequency (different frequency band).

[0267] In addition, Fig.17 In the description, although the terminal performing unicast communication is set as one, the number of terminals performing unicast communication with the base station may be multiple.

[0268] At this time, the structure of the base station Figure 1 , Figure 3 The operation of the setting unit 158 ​​in will be described.

[0269] The setting unit 158 ​​receives the setting signal 160 as input. The setting signal 160 includes information on whether to perform multicast transmission or unicast transmission. Fig.17 In the case of the transmission shown, information that “both the transmission for multicast and the transmission for unicast are performed” is input to the setting unit 158 ​​through the setting signal 160 .

[0270] At the same time, the setting signal 160 includes information on the number of transmission streams when performing multicast. Fig.17 In the case of transmission shown, information that "the number of transmission streams is 2" is input to the setting unit 158 ​​through the setting signal 160.

[0271] Furthermore, the setting signal 160 may also include information on "how many transmission beams are used to transmit each stream". Fig.17 In the case of transmission shown in FIG. 1 , information that “the number of transmission beams of transmission stream 1 is 3, and the number of transmission beams of transmission stream 2 is 3” is input to the setting unit 158 ​​through the setting signal 160 .

[0272] in addition, Figure 1 , Figure 3 The base station can also send data symbols containing control information symbols such as "is it for multicast transmission / or unicast transmission", "number of transmission streams when multicast is performed", "how many transmission beams are used to transmit each stream", etc. Based on this, the terminal can perform appropriate reception.

[0273] Furthermore, the base station may transmit, to a terminal performing unicast communication, a control information symbol for training the base station to perform directivity control and a control information symbol for training the terminal to perform directivity control.

[0274] Fig.18 An example of the communication status between a base station (or access point, etc.) and a terminal is shown. Figure 7 , Fig.12 The same operations are given the same reference numerals and detailed descriptions thereof are omitted.

[0275] The base station 700 has a plurality of antennas, and transmits a plurality of transmission signals from a transmission antenna 701. Figure 1 , Figure 3 In the illustrated configuration, transmission beamforming (directivity control) is performed by performing precoding (weighted synthesis) in the signal processing unit 102 (and / or the weighted synthesis unit 301).

[0276] Furthermore, regarding the description of the transmission beams 1202-1, 1202-2, 1202-3, 1203-1, 1203-2, and 1203-3, due to the use of Fig.12 The description is the same as that of , so the description is omitted.

[0277] In addition, the description of the terminals 704-1, 704-2, 704-3, 704-4, 704-5, and the reception directivities 705-1, 705-2, 705-3, 705-4, 705-5, 706-1, 706-2, 706-3, 706-4, 706-5 is as follows: Fig.12 The description is the same as that of , so the description is omitted.

[0278] exist Fig.18 The characteristic feature is that the base station Fig.12 Multicast is performed as described in the description, and base station 700 and the terminal (for example, 1702) perform unicast communication.

[0279] In addition to the transmission beams 1202-1, 1202-2, 1202-3, 1203-1, 1203-2, and 1203-3 for multicast, the base station 700 Fig.18 In addition, a transmission beam 1701 for unicast is generated to transmit data to terminal 1702 alone. Fig.18 Although an example is shown in which the base station 700 sends one transmit beam 1701 to the terminal 1702, the number of transmit beams is not limited to one, and the base station 700 can also send multiple transmit beams to the terminal 1702 (and can also send multiple modulated signals).

[0280] Furthermore, the terminal 1702 forms a reception directivity 1703 for directivity control during reception through the "signal processing unit 405" and / or the "antennas 401-1 to 401-N" and / or the "multiplication units 603-1 to 603-L and the signal processing unit 605". Accordingly, the terminal 1702 can receive and demodulate the transmission beam 1701.

[0281] In addition, in order to generate a transmission beam including the transmission beam 1701, the base station, for example, Figure 1 , Figure 3 The signal processing unit 102 (and / or the weighted synthesis unit 301) in the illustrated configuration performs precoding (weighted synthesis).

[0282] On the contrary, when the terminal 1702 transmits a modulated signal to the base station 700, the terminal 1702 performs precoding (or weighted synthesis) and transmits a transmission beam 1703, and the base station 700 forms a reception directivity 1701 for directivity control during reception. Thus, the base station 700 can receive and demodulate the transmission beam 1703.

[0283] In addition, the transmission beam 1202-1 used to transmit the "modulation signal 1" and the transmission beam 1203-1 used to transmit the "modulation signal 2" are transmitted by the base station 700 at the same frequency (same frequency band) and the same time. Furthermore, the transmission beam 1202-2 used to transmit the "modulation signal 1" and the transmission beam 1203-2 used to transmit the "modulation signal 2" are transmitted by the base station 700 at the same frequency (same frequency band) and the same time. Furthermore, the transmission beam 1202-3 used to transmit the "modulation signal 1" and the transmission beam 1203-3 used to transmit the "modulation signal 2" are transmitted by the base station 700 at the same frequency (same frequency band) and the same time.

[0284] Furthermore, the transmission beams 1202-1, 1202-2, and 1202-3 used to transmit "modulation signal 1" may be beams of the same frequency (same frequency band) or beams of different frequencies (different frequency bands). The transmission beams 1203-1, 1203-2, and 1203-3 used to transmit "modulation signal 2" may be beams of the same frequency (same frequency band) or beams of different frequencies (different frequency bands).

[0285] Therefore, the transmission beam 1701 for unicast may be a beam of the same frequency (same frequency band) as the transmission beams 1202-1, 1202-2, 1202-3, 1203-1, 1203-2, and 1203-3, or a beam of a different frequency (different frequency band).

[0286] In addition, Fig.18Although it is described that there is one terminal performing unicast communication, the number of terminals performing unicast communication with the base station may be multiple.

[0287] At this time, the structure and Figure 1 , Figure 3 The operation of the setting unit 158 ​​in will be described.

[0288] The setting unit 158 ​​receives the setting signal 160 as input. The setting signal 160 includes information on whether to perform multicast transmission or unicast transmission. Fig.18 In the case of the transmission shown, information that “both the transmission for multicast and the transmission for unicast are performed” is input to the setting unit 158 ​​through the setting signal 160 .

[0289] Furthermore, the setting signal 160 includes information on the number of transmission streams when performing multicasting, and the base station performs Fig.18 In the case of transmission shown, information that “the number of transmission streams is 2” is input to the setting unit 158 ​​through the setting signal 160 .

[0290] Furthermore, the setting signal 160 may also include information on "how many transmission beams are used to transmit each stream". Fig.18 In the case of transmission shown in FIG. 1 , information that “the number of transmission beams of transmission stream 1 is 3, and the number of transmission beams of transmission stream 2 is 3” is input to the setting unit 158 ​​through the setting signal 160 .

[0291] in addition, Figure 1 , Figure 3 The base station can also send data symbols containing control information symbols such as "is it for multicast transmission / or unicast transmission", "number of transmission streams when multicast is performed", and "how many transmission beams are used to transmit each stream". Based on this, the terminal can perform appropriate reception.

[0292] Furthermore, the base station may transmit, to a terminal performing unicast communication, a control information symbol for training the base station to perform directivity control and a control information symbol for training the terminal to perform directivity control.

[0293] Next, as a modification of the first embodiment, a case where a base station transmits a plurality of multicast data transmissions will be described.

[0294] Fig.19 An example of the communication status between a base station (or access point, etc.) and a terminal is shown. Figure 7 The same operations are assigned the same reference numerals and detailed descriptions thereof are omitted.

[0295] The base station 700 has a plurality of antennas, and transmits a plurality of transmission signals from a transmission antenna 701. Figure 1 , Figure 3 In the illustrated configuration, transmission beamforming (directivity control) is performed by performing precoding (weighted synthesis) in the signal processing unit 102 (and / or the weighted synthesis unit 301).

[0296] Furthermore, regarding the description of the transmission beams 702-1, 702-2, 702-3, 703-1, 703-2, 703-3, due to the use of Figure 7 The description is the same as that of , so the description is omitted.

[0297] In addition, the description of the terminals 704-1, 704-2, 704-3, 704-4, 704-5, and the reception directivities 705-1, 705-2, 705-3, 705-4, 705-5, 706-1, 706-2, 706-3, 706-4, 706-5 is as follows: Figure 7 The description is the same as that of , so the description is omitted.

[0298] The base station 700 transmits transmission beams 1901-1, 1901-2, 1902-1, and 1902-2 in addition to transmission beams 702-1, 702-2, 702-3, 703-1, 703-2, and 703-3.

[0299] Transmission beam 1901-1 is a transmission beam used to transmit data of stream 3. Transmission beam 1901-2 is also a transmission beam used to transmit data of stream 3.

[0300] Transmission beam 1902-1 is a transmission beam used to transmit data of stream 4. Transmission beam 1902-2 is also a transmission beam used to transmit data of stream 4.

[0301] 704-1, 704-2, 704-3, 704-4, 704-5, 1903-1, 1903-2, 1903-3 are terminals, for example, Figure 4 , Figure 5 In addition, the operation of terminals 704-1, 704-2, 704-3, 704-4, and 704-5 is similar to that of using Figure 7 Same description as .

[0302] Terminal 1903-1 controls the directivity during reception through "signal processing unit 405" and / or "antennas 401-1 to 401-N" and / or "multiplication units 603-1 to 603-L and processing unit 605" to form reception directivity 1904-1 and reception directivity 1905-1. Furthermore, through reception directivity 1904-1, terminal 1903-1 can receive and demodulate transmission beam 1901-2 for transmitting data of stream 3, and through reception directivity 1905-1, terminal 1903-1 can receive and demodulate transmission beam 1902-2 for transmitting data of stream 4.

[0303] Terminal 1903-2 controls the directivity during reception through "signal processing unit 405" and / or "antennas 401-1 to 401-N" and / or "multiplication units 603-1 to 603-L and processing unit 605" to form reception directivity 1904-2 and reception directivity 1905-2. Terminal 1903-2 can receive and demodulate transmission beam 1902-1 for transmitting data of stream 4 through reception directivity 1904-2, and can receive and demodulate transmission beam 1901-2 for transmitting data of stream 3 through reception directivity 1905-2.

[0304] Terminal 1903-3 performs directivity control during reception through "signal processing unit 405", and / or "antennas 401-1 to 401-N", and / or "multiplication units 603-1 to 603-L, and processing unit 605", and forms reception directivity 1904-3 and reception directivity 1905-3. Furthermore, through reception directivity 1904-3, terminal 1903-3 can receive and demodulate transmission beam 1901-1 for transmitting data of stream 3, and through reception directivity 1905-3, terminal 1903-3 can receive and demodulate transmission beam 1902-1 for transmitting data of stream 4.

[0305] Terminal 1903-4 controls the directivity during reception through "signal processing unit 405" and / or "antennas 401-1 to 401-N" and / or "multiplication units 603-1 to 603-L and processing unit 605" to form reception directivity 1904-4 and reception directivity 1905-4. Furthermore, terminal 1903-4 receives and demodulates transmission beam 703-1 for transmitting data of stream 2 through reception directivity 1904-4, and receives and demodulates transmission beam 1901-1 for transmitting data of stream 3 through reception directivity 1905-4.

[0306] exist Fig.19The characteristic feature is that the base station transmits multiple streams containing multicast data and transmits each stream using multiple transmission beams, and each terminal selectively receives the transmission beam of one or more streams among the multiple streams.

[0307] In addition, the transmission beam 702-1 for transmitting the data of stream 1 and the transmission beam 703-1 for transmitting the data of stream 2 are transmitted by the base station 700 at the same frequency (same frequency band) and the same time. Furthermore, the transmission beam 702-2 for transmitting the data of stream 1 and the transmission beam 703-2 for transmitting the data of stream 2 are transmitted by the base station 700 at the same frequency (same frequency band) and the same time. Furthermore, the transmission beam 702-3 for transmitting the data of stream 1 and the transmission beam 703-3 for transmitting the data of stream 2 are transmitted by the base station 700 at the same frequency (same frequency band) and the same time.

[0308] Transmission beam 1901-1 for transmitting data of stream 3 and transmission beam 1902-1 for transmitting data of stream 4 are transmitted at the same frequency (same frequency band) and at the same time by base station 700. Furthermore, transmission beam 1901-2 for transmitting data of stream 3 and transmission beam 1902-2 for transmitting data of stream 4 are transmitted at the same frequency (same frequency band) and at the same time by base station 700.

[0309] Furthermore, the transmission beams 702-1, 702-2, and 702-3 used to transmit the data of stream 1 may be beams of the same frequency (same frequency band) or beams of different frequencies (different frequency bands). The transmission beams 703-1, 703-2, and 703-3 used to transmit the data of stream 2 may be beams of the same frequency (same frequency band) or beams of different frequencies (different frequency bands).

[0310] Transmission beams 1901-1 and 1901-2 for transmitting data of stream 3 may be beams of the same frequency (same frequency band) or beams of different frequencies (different frequency bands). Furthermore, transmission beams 1902-1 and 1902-2 for transmitting data of stream 4 may be beams of the same frequency (same frequency band) or beams of different frequencies (different frequency bands).

[0311] Moreover, according to Figure 1 The data symbols of stream 1 can be generated based on the #1 information 101-1, and the data symbols of stream 2 can be generated. The data symbols of stream 3 and stream 4 can be generated based on the #2 information 101-2. In addition, the #1 information 101-1 and the #2 information 101-2 can also be error-corrected and coded separately to generate data symbols.

[0312] And, it can also be, according to Figure 1 The #1 information 101-1 generates the data codeword of stream 1 according to Figure 1 The #2 information 101-2 generates the data codeword of stream 2 according to Figure 1 The #3 information 101-3 generates the data codeword of stream 3, according to Figure 1 The #4 information 101-4 generates data symbols of stream 4. Alternatively, the #1 information 101-1, the #2 information 101-2, the #3 information 101-3, and the #4 information 101-4 may be error-correction-encoded separately to generate data symbols.

[0313] That is, the data symbols of each stream are based on Figure 1 Therefore, the terminal can selectively obtain the stream for multicast.

[0314] At this time, the structure and Figure 1 , Figure 3 The operation of the setting unit 158 ​​in the configuration example will be described. The setting unit 158 ​​receives the setting signal 160 as input. The setting signal 160 includes information on whether to perform multicast transmission or unicast transmission. Fig.19 In the case of the transmission shown, information of “performing transmission for multicast” is input to the setting unit 158 ​​through the setting signal 160 .

[0315] The setting signal 160 includes information on the number of transmission streams when performing multicast. Fig.19 In the case of transmission shown, information that “the number of transmission streams is 4” is input to the setting unit 158 ​​through the setting signal 160 .

[0316] Furthermore, the setting signal 160 may include information on "how many transmission beams are used to transmit each stream". Fig.19 In the case of transmission shown, information that "the number of transmission beams of transmission stream 1 is 3, the number of transmission beams of transmission stream 2 is 3, the number of transmission beams of transmission stream 3 is 2, and the number of transmission beams of transmission stream 4 is 2" is input to the setting unit 158 ​​through the setting signal 160.

[0317] in addition, Figure 1 , Figure 3 The base station can also send data symbols containing control information symbols such as "is it for multicast transmission / or unicast transmission", "number of transmission streams when multicast is performed", "how many transmission beams are used to transmit each stream", etc. Based on this, the terminal can perform appropriate reception.

[0318] Next, as a modification of the first embodiment, a case where a base station transmits a plurality of multicast data transmissions will be described.

[0319] Fig. 20 An example of the communication status between a base station (or access point, etc.) and a terminal is shown. Figure 7 , Fig.12 , Fig.19 The same operations are given the same reference numerals and detailed descriptions are omitted.

[0320] The base station 700 has a plurality of antennas, and transmits a plurality of transmission signals from a transmission antenna 701. Figure 1 , Figure 3 In the illustrated configuration, transmission beamforming (directivity control) is performed by performing precoding (weighted synthesis) in the signal processing unit 102 (and / or the weighted synthesis unit 301).

[0321] Furthermore, regarding the description of the transmission beams 1202-1, 1202-2, 1202-3, 1203-1, 1203-2, and 1203-3, Fig.12 The description is repeated and therefore omitted.

[0322] In addition, the description of the terminals 704-1, 704-2, 704-3, 704-4, 704-5, and the reception directivities 705-1, 705-2, 705-3, 705-4, 705-5, 706-1, 706-2, 706-3, 706-4, 706-5 is as follows: Fig.12 The description is repeated and therefore omitted.

[0323] The base station 700 transmits transmission beams 2001-1, 2001-2, 2002-1, and 2002-2 in addition to transmission beams 1202-1, 1202-2, 1202-3, 1203-1, 1203-2, and 1203-3.

[0324] The transmission beam 2001-1 is a transmission beam for transmitting the "modulation signal 3". In addition, the transmission beam 2001-2 is also a transmission beam for transmitting the "modulation signal 3".

[0325] The transmission beam 2002-1 is a transmission beam for transmitting the "modulation signal 4". In addition, the transmission beam 2002-2 is also a transmission beam for transmitting the "modulation signal 4".

[0326] Terminals 704-1, 704-2, 704-3, 704-4, 704-5, 1903-1, 1903-2, 1903-3 are, for example, Figure 4 , Figure 5 In addition, the operation of terminals 704-1, 704-2, 704-3, 704-4, and 704-5 is the same as Figure 7 Same description as .

[0327] Terminal 1903-1 controls the directivity during reception through "signal processing unit 405" and / or "antenna 401-1 to antenna 401-N" and / or "multiplication unit 603-1 to multiplication unit 603-L, and processing unit 605" to form reception directivity 1904-1 and reception directivity 1905-1. Furthermore, through reception directivity 1904-1, terminal 1903-1 can receive and demodulate transmission beam 2001-2 for transmitting "modulation signal 3", and through reception directivity 1905-1, terminal 1903-1 can receive and demodulate transmission beam 2002-2 for transmitting "modulation signal 4".

[0328] Terminal 1903-2 controls the directivity during reception through "signal processing unit 405" and / or "antenna 401-1 to antenna 401-N" and / or "multiplication unit 603-1 to multiplication unit 603-L, and processing unit 605" to form reception directivity 1904-2 and reception directivity 1905-2. Furthermore, through reception directivity 1904-2, terminal 1903-2 can receive and demodulate transmission beam 2002-1 for transmitting "modulation signal 4", and through reception directivity 1905-2, terminal 1903-2 can receive and demodulate transmission beam 2001-2 for transmitting "modulation signal 3".

[0329] Terminal 1903-3 controls the directivity during reception through "signal processing unit 405" and / or "antenna 401-1 to antenna 401-N" and / or "multiplication unit 603-1 to multiplication unit 603-L, and processing unit 605" to form reception directivity 1904-3 and reception directivity 1905-3. Furthermore, through reception directivity 1904-3, terminal 1903-3 can receive and demodulate transmission beam 2001-1 for transmitting "modulation signal 3", and through reception directivity 1905-3, terminal 1903-3 can receive and demodulate transmission beam 2002-1 for transmitting "modulation signal 4".

[0330] Terminal 1903-4 controls the directivity during reception through "signal processing unit 405" and / or "antenna 401-1 to antenna 401-N" and / or "multiplication unit 603-1 to multiplication unit 603-L, and processing unit 605" to form reception directivity 1904-4 and reception directivity 1905-4. Furthermore, through reception directivity 1904-4, terminal 1903-4 can receive and demodulate transmission beam 2001-1 for transmitting "modulation signal 3", and through reception directivity 1905-4, terminal 1903-4 can receive and demodulate transmission beam 2002-1 for transmitting "modulation signal 4".

[0331] exist Fig. 20 In the present invention, a base station transmits a plurality of modulated signals including multicast data, each modulated signal is transmitted using a plurality of transmission beams, and each terminal selectively receives the transmission beam of one or more streams of the plurality of modulated signals.

[0332] In addition, the base station 700 transmits the transmission beam 1202-1 used to transmit the "modulation signal 1" and the transmission beam 1203-1 used to transmit the "modulation signal 2" at the same frequency (same frequency band) and at the same time. Furthermore, the base station 700 transmits the transmission beam 1202-2 used to transmit the "modulation signal 1" and the transmission beam 1203-2 used to transmit the "modulation signal 2" at the same frequency (same frequency band) and at the same time. Furthermore, the base station 700 transmits the transmission beam 1202-3 used to transmit the "modulation signal 1" and the transmission beam 1203-3 used to transmit the "modulation signal 2" at the same frequency (same frequency band) and at the same time.

[0333] The base station 700 transmits the transmission beam 2001-1 for transmitting the "modulation signal 3" and the transmission beam 2002-1 for transmitting the "modulation signal 4" at the same frequency (same frequency band) and the same time. Furthermore, the base station 700 transmits the transmission beam 2001-2 for transmitting the "modulation signal 3" and the transmission beam 2002-2 for transmitting the "modulation signal 4" at the same frequency (same frequency band) and the same time.

[0334] Furthermore, the transmission beams 702-1, 702-2, and 702-3 used to transmit the data of stream 1 may be beams of the same frequency (same frequency band) or beams of different frequencies (different frequency bands). The transmission beams 703-1, 703-2, and 703-3 used to transmit the data of stream 2 may be beams of the same frequency (same frequency band) or beams of different frequencies (different frequency bands).

[0335] Transmission beams 2001-1 and 2001-2 used to transmit "modulation signal 3" may be beams of the same frequency (same frequency band) or beams of different frequencies (different frequency bands). Furthermore, transmission beams 2002-1 and 2002-2 used to transmit "modulation signal 4" may be beams of the same frequency (same frequency band) or beams of different frequencies (different frequency bands).

[0336] At this time, the structure and Figure 1 , Figure 3 The operation of the setting unit 158 ​​in the configuration example will be described. The setting unit 158 ​​receives the setting signal 160 as input. The setting signal 160 includes information on whether to perform multicast transmission or unicast transmission. Fig.19 In the case of the transmission shown, information that “transmission for multicasting is to be performed” is input to the setting unit 158 ​​through the setting signal 160 .

[0337] The setting signal 160 includes information on the number of modulation signals to be transmitted during multicasting. Fig. 20 In the case of transmission shown, information that “the number of transmission modulation signals is 4” is input to the setting unit 158 ​​through the setting signal 160 .

[0338] Furthermore, the setting signal 160 may include information on "how many transmission beams are used to transmit each modulated signal". Fig. 20 In the transmission case shown, the information "the number of transmission beams for sending modulation signal 1 is 3, the number of transmission beams for sending modulation signal 2 is 3, the number of transmission beams for sending modulation signal 3 is 2, and the number of transmission beams for sending modulation signal 4 is 2" is input into the setting unit 158 ​​through the setting signal 160.

[0339] in addition, Figure 1 , Figure 3 The base station may also transmit control information symbols including information such as "is it for multicast transmission / or unicast transmission", "number of transmission streams when performing multicast", and "how many transmission beams are used to transmit each stream" in the data symbols. Thus, the terminal can perform appropriate reception.

[0340] In addition, Fig. 20 In the case where the terminal receives both the transmission beam of "modulation signal 1" and the transmission beam of "modulation signal 2", it is possible to obtain the data of stream 1 and the data of stream 2 with high reception quality.

[0341] Similarly, when the terminal receives both the transmission beam of "modulation signal 3" and the transmission beam of "modulation signal 4", it can obtain the data of stream 3 and the data of stream 4 with high reception quality.

[0342] And, in Fig. 20 In the example, although the base station transmits "modulation signal 1", "modulation signal 2", "modulation signal 3", and "modulation signal 4", the base station may transmit "modulation signal 5" and "modulation signal 6" for transmitting data of stream 5 and data of stream 6, or may transmit more modulation signals in order to transmit more streams. In addition, each modulation signal is transmitted using more than one transmission beam.

[0343] Moreover, if Fig.17 , Fig.18 As described in , there may be more than one transmission beam for unicast (or reception directivity control).

[0344] Regarding the relationship between "modulation signal 1" and "modulation signal 2", due to Fig.13 Here, the relationship between "modulation signal 3" and "modulation signal 4" is used. Fig.21 Provide explanation.

[0345] For example, error correction coding and other processing are performed on the #2 information 101-2 to obtain error correction coded data. The error correction coded data is named #2 transmission data. In addition, the #2 transmission data is mapped to obtain data symbols, and the data symbols are divided into stream 3 and stream 4 to obtain data symbols (data symbol groups) for stream 3 and data symbols (data symbol groups) for stream 4. At this time, the data symbol of stream 3 in symbol number i is s3(i), and the data symbol of stream 4 is s4(i). In this way, the "modulation signal 3" tx3(i) in symbol number i is expressed as follows, for example.

[0346] [Formula 5]

[0347] tx3(i)=e(i)×s3(i)+f(i)×s4(i) Formula (5)

[0348] Furthermore, the "modulation signal 4" tx4(i) in the code element number i is expressed, for example, as follows.

[0349] [Formula 6]

[0350] tx4(i)=g(i)×s3(i)+h(i)×s4(i) Formula (6)

[0351] In addition, in equations (5) and (6), e(i), f(i), g(i), and h(i) can be defined using complex numbers, respectively, and therefore can also be real numbers.

[0352] Furthermore, although they are recorded as e(i), f(i), g(i), and h(i), they do not have to be functions of the symbol number i, but may be fixed values.

[0353] Furthermore, the "symbol group of the modulation signal 3" including the "signal of the data transmission area of ​​the modulation signal 3" constituted by the data symbols is obtained from Figure 1 , Figure 3 In addition, the "modulation signal 4 code group" containing the "signal of the data transmission area of ​​the modulation signal 4" composed of data code elements is sent from Figure 1 , Figure 3 The base station sends it.

[0354] (Replenish)

[0355] Of course, the implementation modes and other contents in this specification may be implemented in various combinations.

[0356] In addition, each implementation mode and other contents are merely examples. For instance, although the examples of "modulation method, error correction coding method (error correction code used, code length, coding rate, etc.), control information, etc." are shown, the same structure can be used when other "modulation method, error correction coding method (error correction code used, code length, coding rate, etc.), control information, etc." are applied.

[0357] Regarding the modulation method, even if a modulation method other than the modulation method described in this specification is used, the implementation methods and other contents in this specification can be executed. For example, APSK (Amplitude Phase Shift Keying), PAM (Pulse Amplitude Modulation), PSK (Phase Shift Keying), QAM (Quadrature Amplitude Modulation) can also be applied, and in each modulation method, uniform mapping or non-uniform mapping can also be used. APSK includes, for example, 16APSK, 64APSK, 128APSK, 256APSK, 1024APSK, and 4096APSK; PAM includes, for example, 4PAM, 8PAM, 16PAM, 64PAM, 128PAM, 256PAM, 1024PAM, and 4096PAM; PSK includes, for example, BPSK, QPSK, 8PSK, 16PSK, 64PSK, 128PSK, 256PSK, 1024PSK, and 4096PSK; and QAM includes, for example, 4QAM, 8QAM, 16QAM, 64QAM, 128QAM, 256QAM, 1024QAM, and 4096QAM.

[0358] Furthermore, the configuration method of 2, 4, 8, 16, 64, 128, 256, 1024, etc. signal points in the IQ plane (modulation method having 2, 4, 8, 16, 64, 128, 256, 1024, etc. signal points) is not the signal point configuration method affected by the modulation method shown in this specification.

[0359] The "base station" recorded in this specification can be, for example, a broadcasting station, a base station, an access point, a terminal, a mobile phone, etc. Furthermore, the "terminal" recorded in this specification can be a television, a radio, a terminal, a personal computer, a mobile phone, an access point, a base station, etc. Furthermore, the "base station" and "terminal" in this disclosure are devices with communication functions, which are configured to be connected to a device such as a television, a radio, a personal computer, a mobile phone, etc. for executing applications via a certain interface. Furthermore, in this embodiment, code elements other than data code elements, such as pilot code elements and code elements for control information, can be arbitrarily configured in a frame.

[0360] Furthermore, pilot symbols and control information symbols may be named in any manner. For example, in a transceiver, any known symbol modulated using PSK modulation may be used, or the symbol may be synchronized with the receiver so that the receiver can know the symbol sent by the transmitter. The receiver uses the symbol to perform frequency synchronization, time synchronization, channel estimation (CSI (Channel State Information) estimation) of each modulated signal, signal detection, etc. In addition, pilot symbols may be called preambles, unique words, postambles, reference symbols, etc.

[0361] Furthermore, the codewords used for control information are codewords used to transmit information that needs to be transmitted to the communication partner for implementing communications other than data (data of applications, etc.) (for example, the modulation method used in the communication, the error correction coding method, the coding rate of the error correction coding method, setting information in the upper layer, etc.).

[0362] In addition, the present disclosure is not limited to the embodiments, and can be implemented with various modifications. For example, in each embodiment, although the case where the communication method is implemented as a communication device is described, the present disclosure is not limited to this, and the communication method can also be implemented as software.

[0363] In addition, for example, a program for executing the above-mentioned communication method may be stored in a ROM (Read Only Memory) in advance, and the program may be operated by a CPU (Central Processor Unit).

[0364] Furthermore, a program for executing the above-mentioned communication method may be stored in a computer-readable storage medium, and the program stored in the storage medium may be recorded in a RAM (Random Access Memory) of a computer to cause the computer to operate according to the program.

[0365] Furthermore, each structure of each of the above-mentioned embodiments and the like can typically be implemented as an LSI (Large Scale Integration) which is an integrated circuit having input terminals and output terminals. They can be made into a single chip, or all or part of the structures of each embodiment can be included in one chip. Here, although it is set as LSI, it is also called IC (Integrated Circuit), system LSI, super LSI, and ultra-large-scale LSI according to the difference in integration. Moreover, the method of integrated circuitization is not limited to LSI, and can also be implemented by a dedicated circuit or a general-purpose processor. It is also possible to use an FPGA (Field Programmable Gate Array) that can be programmed after LSI manufacturing, or a reconfigurable processor that can reconfigure the connection and setting of the circuit unit inside the LSI. Furthermore, if a technology for integrated circuitization that replaces LSI appears due to the advancement of semiconductor technology or other derived technologies, then of course, the technology can also be used to integrate functional blocks. There are also possibilities for application in biotechnology.

[0366] (Implementation 3)

[0367] In this embodiment, a multicast communication method when beamforming different from that in Embodiment 1 and Embodiment 2 is applied will be described.

[0368] Regarding the structure of the base station, since it is different from that of the embodiment 1, Figures 1 to 3 The same description as in the first embodiment is omitted. Figures 4 to 6 The description is the same as that of Implementation 1, so the description of the parts that work the same as Implementation 1 is omitted.

[0369] An example of operations of the base station and the terminal in this embodiment is described below.

[0370] Fig. 22 The figure shows a case where a base station transmits a multicast transmission stream to one terminal.

[0371] exist Fig. 22In the example, the base station 700 transmits the transmission beam 2201-1 of "(for multicast) stream 1-1 (the first beam of stream 1)" from the transmission antenna to the terminal 2202-1. The terminal 2202-1 generates the reception directivity 2203-1 by performing directivity control and receives the transmission beam 2201-1 of "stream 1-1".

[0372] Fig.23 Explains that in order to Fig. 22 The communication status between the base station and the terminal shown is the "order for communication between the base station and the terminal".

[0373] [23-1] The terminal first makes a "request for multicast transmission of stream 1" to the base station.

[0374] [23-2] The base station receives [23-1] and recognizes that "multicast transmission of stream 1 is not being performed." Therefore, the base station transmits training symbols for transmission directivity control and training symbols for reception directivity control in order to perform multicast transmission of stream 1 to the terminal.

[0375] [23-3] The terminal receives the training symbols for transmission directivity control and the training symbols for reception directivity control sent by the base station, and sends feedback information to the base station so that the base station performs transmission directivity control and the terminal performs reception directivity control. [23-4] The base station determines the method of transmission directivity control (determination of weighting coefficients used when performing directivity control, etc.) based on the feedback information sent by the terminal, performs transmission directivity control, and sends data symbols of stream 1.

[0376] [23-5] The terminal determines the reception directivity control method (determination of the weighting coefficient used when performing directivity control, etc.) and starts receiving the data codewords of stream 1 transmitted by the base station.

[0377] in addition, Fig.23 The "order of communication between base stations and terminals" is an example, and the order of sending each information is not affected by Fig.23 Even if the order of sending each message is changed, the same implementation can be achieved. Fig.23 Although the example of the terminal performing reception directivity control is used in the description, the terminal may not perform reception directivity control. Fig.23 In this case, the base station may not send a training symbol for receiving directivity control, and the terminal may not determine a receiving directivity control method.

[0378] Furthermore, when the base station performs transmission directivity control, the base station is Figure 1 In the case of a structure, for example, setting Figure 2 The multiplication coefficients in the multiplication units 204-1, 204-2, 204-3, and 204-4 are Figure 3 In the case of a structure of, for example, in the weighted synthesis unit 301, a weighting coefficient is set. In addition, the number of streams to be transmitted is Fig. 22 In the case of, it is "1", but it is not limited thereto.

[0379] Furthermore, when the terminal performs receiving directivity control, the terminal is Figure 4 In the case of a structure, for example, setting Figure 5 The multiplication coefficients in the multiplication units 503-1, 503-2, 503-3, and 503-4 are Figure 6 In the case of a structure of, for example, the multiplication coefficients in the multiplication units 603-1, 603-2, ..., 603-L are set.

[0380] Fig.24 is shown on the timeline Fig.23 An example of a codeword sent by the base station and a codeword sent by the terminal when the base station sends a codeword for directivity control and receives a codeword for directivity control and a data codeword. Fig.24 (a) is a diagram showing an example of a codeword transmitted by a base station on a time axis. Fig.24 (b) is a diagram showing an example of codewords transmitted by the terminal on the time axis, and the horizontal axis represents time.

[0381] like Fig.23 As shown, in the case where the base station and the terminal communicate, as shown in Fig.24 As shown, first, the base station sends "base station sends directivity control training symbol" 2401. For example, "base station sends directivity control training symbol" 2401 is composed of a control information symbol and a known PSK symbol.

[0382] In addition, the terminal receives the "base station sends directivity control training codeword" 2401 sent by the base station, and sends, for example, information about the antenna used by the base station in transmission and information related to the multiplication coefficient (or weighting coefficient) used in directivity control as feedback information codeword 2402.

[0383] The base station receives the "feedback information symbol" 2402 sent by the terminal, determines the antenna used in transmission based on the feedback information symbol 2402, and determines the coefficient used in transmission directivity control based on the feedback information symbol 2402. After that, the base station sends the "terminal reception directivity control training symbol" 2403. For example, the "terminal reception directivity control training symbol" 2403 is composed of a control information symbol and a known PSK symbol.

[0384] Furthermore, the terminal receives the "terminal reception directivity control training symbol" 2403 sent by the base station, for example, determines the antenna used by the terminal for reception and the multiplication coefficient used by the terminal for reception directivity control. Furthermore, the terminal sends the completion of preparation of the data symbol as a feedback information symbol 2404.

[0385] In addition, the base station receives the “feedback information symbol” 2404 sent by the terminal, and outputs a data symbol 2405 according to the feedback information symbol 2404 .

[0386] in addition, Fig.24 The communication between the base station and the terminal is taken as an example, and the order of sending the code elements, the order of the base station sending and the terminal sending are not limited to this. In addition, each of the "base station sends a directivity control training code element" 2401, the "feedback information code element" 2402, the "terminal receives a directivity control training code element" 2403, the "feedback information code element" 2404, and the "data code element" 2405 may include a preamble signal, a reference code element, a pilot code element, and a code element for transmitting control information, etc., which are used for signal detection, time synchronization, frequency synchronization, frequency offset estimation, and channel estimation.

[0387] Fig.25 yes Fig.23 An example of symbols sent by the base station when the base station sends data symbols of stream 1 after the communication between the base station and the terminal is completed, where the horizontal axis is time.

[0388] exist Fig.25 In the example, the base station transmits the first data symbol of transmission beam 1 of stream 1 as "stream 1-1 data symbol (1) (for multicast)" 2501-1-1. Then, a period 2502-1 in which data symbols can be transmitted is allocated.

[0389] Then, the base station transmits the second data symbol of transmission beam 1 of (multicast) stream 1 as "(multicast) stream 1-1 data symbol (2)" 2501-1-2. Then, a period 2502-2 in which data symbols can be transmitted is allocated.

[0390] Thereafter, the base station transmits the third data symbol of transmission beam 1 of stream 1 (for multicast) as "stream 1-1 data symbol (3) (for multicast)" 2501-1-3.

[0391] In this way, the base station will Fig. 22 The data symbol of "(multicast) stream 1-1" 2201-1 is sent. Fig.25Among them, "(for multicast) stream 1-1 data symbol (1)" 2501-1-1, "(for multicast) stream 1-1 data symbol (2)" 2501-1-2, "(for multicast) data symbol 1-1 data symbol (3)" 2501-1-3, ..., in addition to the data symbols, it may also include pre-synchronization signals, reference symbols, pilot symbols for signal detection, time synchronization, frequency synchronization, frequency offset estimation, channel estimation, and symbols for transmitting control information.

[0392] In addition, Fig.25 In the example, the interval 2502-1 in which data symbol transmission can be performed includes a unicast transmission interval 2503-1, and the interval 2502-2 in which data symbol transmission can be performed includes a unicast transmission interval 2503-2.

[0393] exist Fig.25 In the example, the frame includes unicast transmission intervals 2503-1 and 2503-2. Fig.25 In the example, the base station may transmit multicast symbols in the unicast transmission interval 2503-1 except the data symbol transmission interval 2502-1 and the unicast transmission interval 2503-2 except the data symbol transmission possible interval 2502-2. This will be described later using an example.

[0394] Thus, setting a unicast transmission interval in a frame becomes a useful component for making the wireless communication system operate stably. This will be explained later using examples. Fig.25 The time positions shown can be arbitrarily arranged in time. In addition, in the unicast transmission interval, the base station can send the codeword, and the terminal can also send the codeword.

[0395] In addition, the base station may directly set the unicast transmission interval, or as another method, the base station may set the maximum transmission data transfer rate for transmitting symbols for multicast.

[0396] For example, if the data transmission rate that the base station can transmit is 2 Gbps (bps: bits per second) and the maximum data transmission rate that can be allocated to symbols for multicast transmission in the base station is 1.5 Gbps, a unicast transmission interval equivalent to 500 Mbps can be set.

[0397] In this way, a configuration in which the unicast transmission interval can be indirectly set in the base station is also possible. In addition, other specific examples will be described later.

[0398] In addition, with Fig. 22 state, in Fig.25, it is described that there are frame structures such as "(multicast) stream 1-1 data symbol (1)" 2501-1-1, "(multicast) stream 1-1 data symbol (2)" 2501-1-2, and "(multicast) stream 1-1 data symbol (3)" 2501-1-3, but the present invention is not limited to this. For example, there may be data symbols of a multicast stream other than stream 1 (stream 1-1), or there may be data symbols of stream 1-2 as the second transmission beam of stream 1, and data symbols of stream 1-3 as the third transmission beam of stream 1. This will be described later.

[0399] Fig.26 Shows relative to Fig. 22 The state of the base station sending a multicast transmission stream to one terminal, the state when a new terminal is added, Fig. 22 The same work is given the same number.

[0400] exist Fig.26 The newly added terminal is 2202-2. The terminal 2202-2 generates reception directivity 2203-2 by performing directivity control, and receives the transmission beam 2201-1 of "(multicast) stream 1-1".

[0401] Next, Fig.26 Provide explanation.

[0402] In the following description, relative to Fig.26 In the state where the base station 700 and the terminal 2202-1 are performing multicast communication, the new terminal 2202-2 is participating in the multicast communication. Fig. 27 The base station shown sends "terminal reception directivity control training symbol" 2701 and "data symbol" 2702, and does not send Fig.24 The base station sends training symbols. Fig. 27 , the horizontal axis is time.

[0403] Fig.28 Shows that in order to become Fig.26 This is an example of an operation performed in a state where the base station transmits a transmission beam for multicast to two terminals as shown.

[0404] [28-1] Terminal 2202-2 sends a "request for multicast transmission of stream 1" to the base station. Fig.25 It is sent in the unicast sending interval.

[0405] [28-2] The base station receives [28-1] and notifies the terminal 2202-2 that "stream 1 for multicast is to be transmitted". Fig.25 It is sent in the unicast sending interval.

[0406] [28-3] The terminal 2202-2 receives [28-2] and performs reception directivity control to start receiving the multicast stream 1. The terminal 2202-2 performs reception directivity control to notify the base station that the multicast stream 1 can be received.

[0407] [28-4] The base station accepts [28-3] and confirms that the terminal can receive "stream 1 for multicast".

[0408] [28-5] The terminal 2202-2 performs reception directivity control and starts receiving "stream 1 for multicast".

[0409] Fig.29 Shows relative to Fig. 22 The state of the base station sending a multicast stream to a terminal, the state when a new terminal is added, Fig. 22 The same work is given the same number.

[0410] exist Fig.29 The newly added terminal is 2202-2. Fig.26 The difference is that the base station 700 newly transmits the transmission beam 2201-2 of "(for multicast) stream 1-2 (second of stream 1)", and the terminal 2202-2 generates the reception directivity 2203-2 by performing directivity control, and receives the transmission beam 2201-2 of "(for multicast) stream 1-2".

[0411] Next, for Fig.29 The control performed in the state shown is explained.

[0412] In the following description, Fig.29 In the figure, the base station 700 and the terminal 2202-1 are in a state of performing multicast communication, and the terminal 2202-2 is in a state of newly participating in the multicast communication.

[0413] Fig.30 Shows that in order to become Fig.29 This is an example of an operation performed in a state where the base station transmits a transmission beam for multicast to two terminals as shown.

[0414] [30-1] Terminal 2202-2 sends a "request for multicast transmission of stream 1" to the base station. Fig.25 The unicast sending interval in is sent.

[0415] [30-2] The base station receives [30-1] and notifies the terminal 2202-2 that "stream 1 for multicast is to be transmitted". Fig.25 The unicast sending interval in is sent.

[0416] [30-3] The terminal 2202-2 receives [30-2] and notifies the base station that "the multicast stream 1 is not received". In addition, the notification of "the multicast stream 1 is not received" is sent to the base station. Fig.25 The unicast sending interval in is sent.

[0417] [30-4] The base station receives [30-3] and decides to use another transmission beam (i.e. Fig.29 In addition, although it is determined here that the other transmission beams of the multicast stream 1 are transmitted, it may be determined that the other transmission beams of the multicast stream 1 are not transmitted. This will be described later.

[0418] Therefore, in order to perform multicast transmission of stream 1 to terminal 2202-2, the base station transmits a training symbol for transmission directivity control and a training symbol for reception directivity control. In addition to the transmission of these symbols, the base station Fig.29 The transmit beam of stream 1-1 in is transmitted. This will be described later.

[0419] [30-5] Terminal 2202-2 receives training symbols for transmission directivity control and training symbols for reception directivity control sent by the base station, and sends feedback information to the base station so that the base station performs transmission directivity control and terminal 2202-2 performs reception directivity control.

[0420] [30-6] The base station determines the method of transmitting directivity control (determining the weighting coefficient used when performing directivity control, etc.) based on the feedback information sent by the terminal 2202-2, and sends the data codewords of stream 1 ( Fig.29 The transmit beam 2201-2 of stream 1-2 is sent.

[0421] [30-7] The terminal 2202-2 determines the reception directivity control method (determining the weighting coefficient used when performing directivity control, etc.), and starts to transmit the data codeword of stream 1 ( Fig.29 Reception of the transmit beam 2201-2 of stream 1-2).

[0422] in addition, Fig.30 The "order for communication between the base station and the terminal" is an example, and the order in which each information is sent is not affected by Fig.30 The same can be done even if the order of sending each message is changed.

[0423] In addition, Fig.30 In the description, the case where the receiving directivity control of the terminal is performed is taken as an example, but it may also be the case where the terminal does not perform the receiving directivity control. Fig.30In the present invention, the base station may not send training symbols for reception directivity control, and the terminal may not determine the reception directivity control method.

[0424] Furthermore, when the base station performs transmission directivity control, the structure of the base station is Figure 1 In the case of a structure, for example, setting Figure 2 The multiplication coefficients in the multiplication units 204-1, 204-2, 204-3, and 204-4 are as follows: Figure 3 In the case of a structure of, for example, the weighting coefficient is set in the weighted synthesis unit 301. In addition, the number of streams to be transmitted is Fig.29 In the case of , it is "2", but it is not limited thereto.

[0425] Furthermore, when the terminals 2202-1 and 2202-2 perform reception directivity control, the structure of the terminals is Figure 4 In the case of a structure, for example, setting Figure 5 The multiplication coefficients in the multiplication units 503-1, 503-2, 503-3, 503-4, and the structure at the terminal is Figure 6 In the case of a structure of, for example, the multiplication coefficients in the multiplication units 603-1, 603-2, ..., 603-L are set.

[0426] Fig.31 Shows Fig.30 An example of a codeword transmitted by the base station when the base station transmits the data codeword of stream 1 after the communication between the base station and the terminal is completed, where the horizontal axis represents time.

[0427] exist Fig.31 In, due to the existence Fig.29 The "flow 1-1" is thus Fig.25 Similarly, there are "(multicast) stream 1-1 data symbol (M)" 2501-1-M, "(multicast) stream 1-1 data symbol (M+1)" 2501-1-(M+1), and "(multicast) stream 1-1 data symbol (M+2)" 2501-1-(M+2). In addition, the reason why it is recorded as "(M), (M+1), (M+2)" is that (multicast) stream 1-1 existed before (multicast) stream 1-2 existed. Therefore, in Fig.31 , M is an integer greater than 2.

[0428] And, if Fig.31 As shown, in the interval other than the unicast transmission intervals 2503-1 and 2503-2, there are "(for multicast) stream 1-2 data codeword (1)" 3101-1, "(for multicast) stream 1-2 data codeword (2)" 3101-2, and "(for multicast) stream 1-2 data codeword (3)" 3101-3.

[0429] As described so far, it has the following features.

[0430] ·“(For multicast) stream 1-1 data symbol (M)” 2501-1-M, “(For multicast) stream 1-1 data symbol (M+1)” 2501-1-(M+1), “(For multicast) stream 1-1 data symbol (M+2)” 2501-1-(M+2), “(For multicast) stream 1-2 data symbol (1)” 3101-1, “(For multicast) stream 1-2 data symbol (2)” 3101-2, and “(For multicast) stream 1-2 data symbol (3)” 3101-3 are all data symbols used to transmit “stream 1”.

[0431] The terminal can obtain "stream 1 data" by obtaining "stream 1-1 data symbols". Also, the terminal can obtain "stream 1 data" by obtaining "stream 1-2 data symbols".

[0432] The directivity of the transmission beam of “(for multicast) stream 1-1 data symbol (M)” 2501-1-M, “(for multicast) stream 1-1 data symbol (M+1)” 2501-1-(M+1), and “(for multicast) stream 1-1 data symbol (M+2)” 2501-1-(M+2) is different from the directivity of the transmission beam of “(for multicast) stream 1-2 data symbol (1)” 3101-1, “(for multicast) stream 1-2 data symbol (2)” 3101-2, and “(for multicast) stream 1-2 data symbol (3)” 3101-3. Therefore, the set of multiplication coefficients (or weighting coefficients) of the base station's transmitting device used to generate the transmission beams of "(multicast) stream 1-1 data symbol (M)" 2501-1-M, "(multicast) stream 1-1 data symbol (M+1)" 2501-1-(M+1), and "(multicast) stream 1-1 data symbol (M+2)" 2501-1-(M+2) is different from the set of multiplication coefficients (or weighting coefficients) of the base station's transmitting device used to generate the transmission beams of "(multicast) stream 1-2 data symbol (1)" 3101-1, "(multicast) stream 1-2 data symbol (2)" 3101-2, and "(multicast) stream 1-2 data symbol (3)" 3101-3.

[0433] According to the above, two terminals can receive the multicast stream sent by the base station. At this time, since the directivity control is performed during transmission and reception, the effect of making the area for receiving the multicast stream wide is obtained. In addition, since the addition of streams and transmission beams is only performed when necessary, the effect of effectively utilizing the frequency, time, and space resources used to transmit data is obtained.

[0434] In addition, there are cases where control which will be described later is performed. The details of the control are as follows.

[0435] Fig.32 is with Fig.31 Different Fig.30 An example of a codeword sent by a base station when a data codeword (of stream 1) is sent from the base station after the communication between the base station and the terminal is completed. The horizontal axis is set as time. Fig.32 In Fig.25 , Fig.31 The same work is assigned the same number.

[0436] exist Fig.32 In, with Fig.31 The difference is that since the unicast transmission intervals 2503-1 and 2503-2 are set to be longer in time, the base station adds further multicast symbols without transmitting them.

[0437] Fig.33 Shows the difference Fig.29 The base station shown in FIG. 2 transmits a transmission beam for multicast to two terminals (terminals 2202-1 and 2202-2), and a new terminal 2202-3 requests the base station to add a transmission beam. Fig.32 A frame of a modulated signal transmitted by a base station is shown.

[0438] [33-1] Terminal 2202-3 sends a "request for multicast transmission of stream 1" to the base station. In addition, the "request for multicast transmission of stream 1" is sent to the base station. Fig.32 The unicast sending interval in is sent.

[0439] [33-2] The base station receives [33-1] and notifies the terminal 2202-3 that "the transmission of stream 1 for multicast is in progress". Fig.32 The unicast sending interval in is sent.

[0440] [33-3] The terminal 2202-3 receives [33-2] and notifies the base station that "the multicast stream 1 has not been received". In addition, the "notification of not receiving the multicast stream 1" is Fig.32 The unicast sending interval in is sent.

[0441] [33-4] The base station receives [33-3] and determines whether it can transmit a transmission beam different from the transmission beam of stream 1-1 and the transmission beam of stream 1-2 as the transmission beam of multicast stream 1. Fig.32 In the frame shown in FIG. 1 , the base station determines that the other transmission beams for multicast stream 1 are not to be transmitted. Therefore, the base station notifies the terminal 2202-3 that "the other transmission beams for multicast stream 1 are not to be transmitted". In addition, the "notification of not transmitting the other transmission beams for multicast stream 1" is Fig.32The unicast sending interval in is sent.

[0442] [33-5] The terminal 2202-3 receives the "notification of not transmitting another transmission beam for multicast stream 1".

[0443] in addition, Fig.33 The order of communication between the base station and the terminal is only an example, and the order of sending each information is not affected by Fig.33 Therefore, even if the order of each transmission is changed, the same execution can be performed. In this way, when the communication resources for multicast transmission are insufficient, it is not necessary to add a multicast transmission beam.

[0444] Fig.34 Shows the difference Fig.29 The base station shown in FIG. 2 transmits a multicast transmission beam to two terminals (terminals 2202-1 and 2202-2), and the new terminal 2202-3 requests the base station to add a transmission beam for another multicast stream (stream 2). In addition, the frame of the modulated signal transmitted by the base station is Fig.31 Status shown.

[0445] [34-1] Terminal 2202-3 sends a "request for multicast transmission of stream 2" to the base station. Fig.31 The unicast transmission interval 2503 in is sent.

[0446] [34-2] The base station receives [34-1] and notifies the terminal 2202-3 that "stream 2 for multicast will not be transmitted". In addition, the base station determines whether it is possible to add a transmission beam for stream 2 for multicast and transmit it. At this time, it is considered that Fig.31 In the frame state shown, the terminal 2202-3 is notified of "corresponding to the transmission of the transmission beam of the multicast stream 2". In addition, "notification of not transmitting the multicast stream 2" and "notification that the transmission beam of the multicast stream 2 can be transmitted" are in Fig.31 The unicast transmission interval 2503 in is sent.

[0447] [34-3] The terminal 2203-3 receives [34-2] and notifies the base station that "the reception preparation of the multicast stream 2 is completed". Fig.31 The unicast transmission interval 2503 in is sent.

[0448] [34-4] The base station receives [34-3] and decides to transmit the transmission beam of stream 2 for multicast. Therefore, in order to perform multicast transmission of stream 2 to terminal 2202-3, the base station transmits the training symbol for transmission directivity control and the training symbol for reception directivity control. In addition to the transmission of these symbols, the base station transmits Fig.31 The transmission beam of the stream 1-1 and the transmission beam of the stream 1-2 are shown. This will be described later.

[0449] [34-5] Terminal 2202-3 receives the training symbols for transmission directivity control and the training symbols for reception directivity control sent by the base station. The base station performs transmission directivity control and terminal 2202-3 performs reception directivity control, and sends feedback information to the base station.

[0450] [34-6] The base station determines the method of transmitting directivity control (determination of the weighting coefficient used when performing directivity control, etc.) based on the feedback information sent by the terminal 2202-3, and sends the data codewords of stream 2.

[0451] [34-7] Terminal 2202-3 determines the reception directivity control method (determination of the weighting coefficient used when performing directivity control, etc.) and starts receiving the data codewords of stream 2 sent by the base station.

[0452] in addition, Fig.34 The "order of communication between base stations and terminals" is an example, and the order of sending each information is not affected by Fig.34 Even if the order of sending each message is changed, the same execution can be performed. Fig.34 Although the example of the case where the terminal performs reception directivity control is described in the above, the case where the terminal does not perform reception directivity control may also be described. Fig.34 In the present invention, the base station may not send training symbols for reception directivity control, and the terminal may not decide on the reception directivity control method.

[0453] Furthermore, when the base station performs transmission directivity control, the base station Figure 1 In the case of a structure, for example, setting Figure 2 The multiplication coefficients in the multiplication units 204-1, 204-2, 204-3, and 204-4.

[0454] Furthermore, when terminals 2202-1, 2202-2, and 2202-3 perform reception directivity control, Figure 4 In the case of a structure such as Figure 5 The multiplication coefficients in the multiplication units 503-1, 503-2, 503-3, and 503-4 are as follows: Figure 6 In the case of a structure of, for example, the multiplication coefficients in the multiplication units 603-1, 603-2, ..., 603-L are set.

[0455] Fig.35 Shown in Fig.34An example of codewords sent by the base station when the base station sends data codewords of streams 1 and 2 after the communication between the base station and the terminal is completed, where the horizontal axis is time.

[0456] exist Fig.35 In, due to the existence Fig.31 As shown in the figure, "stream 1-1" and "stream 1-2", there are "stream 1-1 data symbol (M) (for multicast)" 2501-1-M, "stream 1-1 data symbol (M+1) (for multicast)" 2501-1-(M+1), "stream 1-1 data symbol (M+2) (for multicast)" 2501-1-(M+2), and there are "stream 1-2 data symbol (N) (for multicast)" 3101-N, "stream 1-2 data symbol (N+1) (for multicast)" 3101-(N+1), "stream 1-2 data symbol (N+2) (for multicast)" 3101-(N+2). In addition, N and M are integers greater than 2.

[0457] So, if Fig.35 As shown, in the interval other than the unicast transmission intervals 2503-1 and 2503-2, there are "(multicast) stream 2-1 data symbol (1)" 3501-1, "(multicast) stream 2-1 data symbol (2)" 3501-2, and "(multicast) stream 2-1 data symbol (3)" 3501-3.

[0458] As described so far, this has the following features.

[0459] ·“(For multicast) stream 1-1 data symbol (M)” 2501-1-M, “(For multicast) stream 1-1 data symbol (M+1)” 2501-1-(M+1), “(For multicast) stream 1-1 data symbol (M+2)” 2501-1-(M+2), “(For multicast) stream 1-2 data symbol (N)” 3101-N, “(For multicast) stream 1-2 data symbol (N+1)” 3101-(N+1), and “(For multicast) stream 1-2 data symbol (N+2)” 3101-(N+2) are all data symbols used to transmit “stream 1”.

[0460] The terminal obtains "data of stream 1" by obtaining "data symbol of stream 1-1". Furthermore, the terminal obtains "data of stream 1" by obtaining "data symbol of stream 1-2".

[0461] The directivity of the transmission beam of “(for multicast) stream 1-1 data symbol (M)” 2501-1-M, “(for multicast) stream 1-1 data symbol (M+1)” 2501-1-(M+1), and “(for multicast) stream 1-1 data symbol (M+2)” 2501-1-(M+2) is different from the directivity of the transmission beam of “(for multicast) stream 1-2 data symbol (1)” 3101-1, “(for multicast) stream 1-2 data symbol (2)” 3101-2, and “(for multicast) stream 1-2 data symbol (3)” 3101-3.

[0462] Therefore, the set of multiplication coefficients (or weighting coefficients) of the base station's transmitting device used to generate the transmission beams of "(multicast) stream 1-1 data symbol (M)" 2501-1-M, "(multicast) stream 1-1 data symbol (M+1)" 2501-1-(M+1), and "(multicast) stream 1-1 data symbol (M+2)" 2501-1-(M+2) is different from the set of multiplication coefficients (or weighting coefficients) of the base station's transmitting device used to generate the transmission beams of "(multicast) stream 1-2 data symbol (1)" 3101-1, "(multicast) stream 1-2 data symbol (2)" 3101-2, and "(multicast) stream 1-2 data symbol (3)" 3101-3.

[0463] "(Multicast) stream 2-1 data symbol (1)" 3501-1, "(Multicast) stream 2-1 data symbol (2)" 3501-2, and "(Multicast) stream 2-1 data symbol (3)" 3501-3 are data symbols for transmitting "stream 2".

[0464] The terminal obtains the data of "stream 2" by obtaining the "data symbol of stream 2-1". As described above, the terminal can receive multiple multicast streams (stream 1 and stream 2) transmitted by the base station. At this time, since the directivity control is performed during transmission and reception, the effect of making the area where the multicast stream can be received become a wide range is obtained. In addition, since the addition of streams and the addition of transmission beams are only performed when necessary, the effect of effectively utilizing the frequency, time, and space resources used to transmit data can be obtained.

[0465] In addition, control which will be described later can also be performed. The details of the control are as follows.

[0466] Fig.32 is with Fig.35 Different "Examples of symbols sent by the base station when the base station sends data symbols (of stream 1)", the horizontal axis is time. Fig.32 In the Fig.25 and Fig.31 The same work is given the same number.

[0467] exist Fig.32 In, with Fig.35 The difference is that since the unicast transmission intervals 2503-1 and 2503-2 are set to be longer in time, the base station does not need to add more symbols for multicast than this, for example, it does not need to add symbols of a new stream to transmit.

[0468] Fig.36 Shows the difference Fig.29 The base station shown in the figure sends a multicast transmission beam to two terminals (terminals 2202-1 and 2202-2), and the new terminal 2202-3 makes an additional request to the base station for a transmission beam of another multicast stream (stream 2). Fig.32 Shows a frame of a modulated signal transmitted by a base station.

[0469] [36-1] Terminal 2202-3 sends a "request for multicast transmission of stream 2" to the base station. Fig.32 The unicast sending interval in is sent.

[0470] [36-2] The base station receives [36-1] and notifies the terminal 2202-3 that "the multicast stream 2 is not being transmitted". Fig.32 The unicast transmission interval in is transmitted. Then, the base station determines whether it is possible to transmit the transmission beam of multicast stream 2. The base station considers Fig.32 The base station determines that the transmission beam of multicast stream 2 is not to be transmitted. Therefore, the base station notifies the terminal 2202-3 that "the transmission beam of multicast stream 2 is not to be transmitted". Fig.32 The unicast sending interval in is sent.

[0471] [36-3] The terminal 2202-3 receives the "notification of not sending the transmission beam of the multicast stream 2".

[0472] in addition, Fig.36 The order of communication between the base station and the terminal is taken as an example. The order of sending each information is not affected by Fig.36 Therefore, even if the order of each transmission is changed, the same execution can be performed. In this way, when the communication resources for multicast transmission are insufficient, it is not necessary to add a stream or add a multicast transmission beam.

[0473] In addition, Fig.35 The setting method of the unicast transmission intervals 2503-1 and 2503-2 shown in the following is supplementary explanation.

[0474] For example, in Fig.35In the example, the maximum number of transmission beams for multicast is determined or set in advance.

[0475] Then, in response to requests from each terminal, the base station transmits a number of multicast transmission beams equal to or less than the maximum number of multicast transmission beams. Fig.35 In the case of , the number of transmission beams for multicast is 3. Therefore, although the base station transmits a plurality of transmission beams for multicast, an idle time after the transmission of the beams is set as a unicast transmission interval.

[0476] As described above, the unicast transmission interval may be set.

[0477] (Supplement 1)

[0478] In Supplement 1, a case where a base station performs unicast communication, that is, individual communication with a plurality of terminals is described.

[0479] At this time, for example Fig. 9 Symbol group #1 901-1 of stream 1, symbol group #2 901-2 of stream 1, and symbol group #3 901-3 of stream 1 are broadcast channels, that is, they may be control information that a base station broadcasts to multiple terminals in order to perform data communication with multiple terminals. In addition, control information refers to, for example, control information required by a base station and a terminal to achieve data communication.

[0480] And, for example Fig. 9 The symbol group #1 901-1 of stream 1, the symbol group #2 901-2 of stream 1, and the symbol group #3 901-3 of stream 1 may be a common search space. In addition, the common search space refers to control information for performing cell control. And the common search space is control information broadcast to multiple terminals.

[0481] Likewise, for example Fig. 9 Symbol group #1 902-1 of stream 2, symbol group #2 902-2 of stream 2, and symbol group #3 902-3 of stream 2 are broadcast channels, that is, control information that the base station broadcasts to multiple terminals in order to communicate data with the multiple terminals.

[0482] In addition, for example Fig. 9 Symbol group #1 902-1 of stream 2, symbol group #2 902-2 of stream 2, and symbol group #3 902-3 of stream 2 may also be a common search space.

[0483] In addition, about Fig. 9The features of symbol group #1 901-1 of stream 1, symbol group #2 901-2 of stream 1, symbol group #3 901-3 of stream 1, symbol group #1 902-1 of stream 2, symbol group #2 902-2 of stream 2, and symbol group #3 902-3 of stream 2 are as described in the above-described embodiment.

[0484] For example, Fig.14 Symbol group #1 1401-1 of modulation signal 1, symbol group #2 1401-2 of modulation signal 1, and symbol group #3 1401-3 of modulation signal 1 may also be broadcast channels, that is, they may be control information broadcasted by the base station to multiple terminals in order to communicate data with the multiple terminals.

[0485] In addition, for example Fig.14 The #1 symbol group 1401-1 of modulation signal 1, the #2 symbol group 1401-2 of modulation signal 1, and the #3 symbol group 1401-3 of modulation signal 1 can also be a common search space.

[0486] For example, Fig.14 Symbol group #1 1402-1 of modulation signal 2, symbol group #2 1402-2 of modulation signal 2, and symbol group #3 1402-3 of modulation signal 2 may also be broadcast channels, that is, they may be control information broadcasted by the base station to multiple terminals in order to communicate data with the multiple terminals.

[0487] In addition, for example Fig.14 Symbol group #1 1402-1 of modulation signal 2, symbol group #2 1402-2 of modulation signal 2, and symbol group #3 1402-3 of modulation signal 2 may also be a common search space.

[0488] in addition, Fig.14 The #1 symbol group 1401-1 of the modulation signal 1, the #2 symbol group 1401-2 of the modulation signal 1, and the #3 symbol group 1401-3 of the modulation signal 1 are as described in the above-described embodiment. Fig.14 The #1 symbol group 1402-1 of the modulation signal 2, the #2 symbol group 1402-2 of the modulation signal 2, and the #3 symbol group 1402-3 of the modulation signal 2 are as described in the above-described embodiment.

[0489] For example, Fig.25 Stream 1-1 data symbol (1) 2501-1-1, stream 1-1 data symbol (2) 2501-1-2, and stream 1-1 data symbol (3) 2501-1-3 may also be broadcast channels, that is, they may be control information broadcasted by the base station to multiple terminals in order to communicate data with the multiple terminals.

[0490] and, Fig.25 Stream 1-1 data symbol (1) 2501-1-1, stream 1-1 data symbol (2) 2501-1-2, and stream 1-1 data symbol (3) 2501-1-3 may also be a common search space.

[0491] in addition, Fig.25 The stream 1-1 data symbol (1) 2501-1-1, the stream 1-1 data symbol (2) 2501-1-2, and the stream 1-1 data symbol (3) 2501-1-3 are as described in the above-described embodiment.

[0492] For example, Fig.31 , Fig.32 Stream 1-1 data symbol (M) 2501-1-M, stream 1-1 data symbol (M+1) 2501-1-(M+1), stream 1-1 data symbol (M+2) 2501-1-(M+2), stream 1-2 data symbol (1) 3101-1, stream 1-2 data symbol (2) 3101-2, and stream 1-2 data symbol (3) 3101-3 may be broadcast channels, that is, they may be control information broadcasted by the base station to multiple terminals in order to communicate data with the multiple terminals.

[0493] and, Fig.31 , Fig.32 Stream 1-1 data symbol (M) 2501-1-M, stream 1-1 data symbol (M+1) 2501-1-(M+1), stream 1-1 data symbol (M+2) 2501-1-(M+2), stream 1-2 data symbol (1) 3101-1, stream 1-2 data symbol (2) 3101-2, and stream 1-2 data symbol (3) 3101-3 may also be common search spaces.

[0494] in addition, Fig.31 , Fig.32 The stream 1-1 data symbol (M) 2501-1-M, stream 1-1 data symbol (M+1) 2501-1-(M+1), stream 1-1 data symbol (M+2) 2501-1-(M+2), stream 1-2 data symbol (1) 3101-1, stream 1-2 data symbol (2) 3101-2, and stream 1-2 data symbol (3) 3101-3 are as described in the above-described embodiment.

[0495] For example, in Fig.35, stream 1-1 data symbol (M) 2501-1-M, stream 1-1 data symbol (M+1) 2501-1-(M+1), stream 1-1 data symbol (M+2) 2501-1-(M+2), stream 1-2 data symbol (N) 3101-N, stream 1-2 data symbol (N+1) 3101-(N+1), and stream 1-2 data symbol (N+2) 3101-(N+2) may be broadcast channels, that is, they may be control information that the base station broadcasts to multiple terminals in order to communicate data with the multiple terminals.

[0496] And, in Fig.35 , stream 1-1 data symbol (M) 2501-1-M, stream 1-1 data symbol (M+1) 2501-1-(M+1), stream 1-1 data symbol (M+2) 2501-1-(M+2), stream 1-2 data symbol (N) 3101-N, stream 1-2 data symbol (N+1) 3101-(N+1), and stream 1-2 data symbol (N+2) 3101-(N+2) can also be common search spaces.

[0497] For example, Fig.35 Stream 2-1 data symbol (1) 3501-1, stream 2-1 data symbol (2) 3501-2, and stream 2-1 data symbol (3) 3501-3 may be broadcast channels, that is, they may be control information that the base station broadcasts to multiple terminals in order to communicate data with the multiple terminals.

[0498] and, Fig.35 Stream 2-1 data symbol (1) 3501-1, stream 2-1 data symbol (2) 3501-2, and stream 2-1 data symbol (3) 3501-3 may also be a common search space.

[0499] In addition, Fig.35 , stream 1-1 data symbol (M) 2501-1-M, stream 1-1 data symbol (M+1) 2501-1-(M+1), stream 1-1 data symbol (M+2) 2501-1-(M+2), stream 1-2 data symbol (N) 3101-N, stream 1-2 data symbol (N+1) 3101-(N+1), and stream 1-2 data symbol (N+2) 3101-(N+2) are as described in the above-described embodiment. Fig.35 The stream 2-1 data symbol (1) 3501-1, the stream 2-1 data symbol (2) 3501-2, and the stream 2-1 data symbol (3) 3501-3 are as described in the above-described embodiment.

[0500] exist Fig. 9 , Fig.14 , Fig.25 , Fig.31 , Fig.32 , Fig.35 In the case of transmitting each data symbol, a single carrier transmission method or a multi-carrier transmission method such as OFDM can be used. Furthermore, the temporal position of the data symbol is not affected by the Fig. 9 , Fig.14 , Fig.25 , Fig.31 , Fig.32 , Fig.35 limited.

[0501] In addition, Fig.25 , Fig.31 , Fig.32 , Fig.35 In the description, the horizontal axis is time, but even if the horizontal axis is set to frequency (carrier), the same implementation can be achieved. In addition, when the horizontal axis is set to frequency (carrier), the base station uses more than one carrier or subcarrier to send each data symbol.

[0502] (Supplement 2)

[0503] In Supplement 2, a case where a base station and a plurality of terminals perform unicast communication, that is, individual communication, is described.

[0504] At this time, for example Fig. 9 The symbol group #1 901-1 of stream 1, the symbol group #2 901-2 of stream 1, the symbol group #3 901-3 of stream 1, the symbol group #1 902-1 of stream 2, the symbol group #2 902-2 of stream 2, and the symbol group #3 902-3 of stream 2 may be data destined for the base station or data destined for one of the multiple terminals performing communication. In this case, control information may also be included in the data.

[0505] in addition, Fig. 9 Symbol group #1 901-1 of stream 1, symbol group #2 901-2 of stream 1, symbol group #3 901-3 of stream 1, symbol group #1 902-1 of stream 2, symbol group #2 902-2 of stream 2, and symbol group #3 902-3 of stream 2 are as described in the above-described embodiment.

[0506] For example, Fig.14 The first symbol group 1401-1 of the modulation signal 1, the second symbol group 1401-2 of the modulation signal 1, the third symbol group 1401-3 of the modulation signal 1, the first symbol group 1401-3 of the modulation signal 2, the second symbol group 1402-2 of the modulation signal 2, and the third symbol group 1402-3 of the modulation signal 2 may be data destined for the base station or data destined for one of the multiple terminals performing communication. At this time, the data may also include control information.

[0507] in addition, Fig.14 The #1 symbol group 1401-1 of the modulation signal 1, the #2 symbol group 1401-2 of the modulation signal 1, the #3 symbol group 1401-3 of the modulation signal 1, the #1 symbol group 1401-3 of the modulation signal 2, the #2 symbol group 1402-2 of the modulation signal 2, and the #3 symbol group 1402-3 of the modulation signal 2 are as described in the above-described embodiment.

[0508] For example, Fig.25 The stream 1-1 data symbol (1) 2501-1-1, the stream 1-1 data symbol (2) 2501-1-2, and the stream 1-1 data symbol (3) 2501-1-3 may be data destined for the base station or data destined for one of the multiple terminals performing communication. In this case, the data may also include control information.

[0509] in addition, Fig.25 The stream 1-1 data symbol (1) 2501-1-1, the stream 1-1 data symbol (2) 2501-1-2, and the stream 1-1 data symbol (3) 2501-1-3 are as described in the above-described embodiment.

[0510] For example, Fig.31 , Fig.32 The stream 1-1 data symbol (M) 2501-1-M, stream 1-1 data symbol (M+1) 2501-1-(M+1), stream 1-1 data symbol (M+2) 2501-1-(M+2), stream 1-2 data symbol (1) 3101-1, stream 1-2 data symbol (2) 3101-2, and stream 1-2 data symbol (3) 3101-3 are data destined for the base station or data destined for one of a plurality of communicating terminals. At this time, control information may also be included in the data.

[0511] in addition, Fig.31 , Fig.32 The stream 1-1 data symbol (M) 2501-1-M, stream 1-1 data symbol (M+1) 2501-1-(M+1), stream 1-1 data symbol (M+2) 2501-1-(M+2), stream 1-2 data symbol (1) 3101-1, stream 1-2 data symbol (2) 3101-2, and stream 1-2 data symbol (3) 3101-3 are as described in the above-described embodiment.

[0512] For example, in Fig.35In the example, stream 1-1 data symbol (M) 2501-1-M, stream 1-1 data symbol (M+1) 2501-1-(M+1), stream 1-1 data symbol (M+2) 2501-1-(M+2), stream 1-2 data symbol (N) 3101-N, stream 1-2 data symbol (N+1) 3101-(N+1), and stream 1-2 data symbol (N+2) 3101-(N+2) may be data destined for the base station or data destined for one of a plurality of communicating terminals. In this case, control information may also be included in the data.

[0513] For example, Fig.35 The stream 2-1 data symbol (1) 3501-1, stream 2-1 data symbol (2) 3501-2, and stream 2-1 data symbol (3) 3501-3 may be data destined for the base station or data destined for one of the multiple terminals performing communication. In this case, the data may also include control information.

[0514] In addition, Fig.35 , stream 1-1 data symbol (M) 2501-1-M, stream 1-1 data symbol (M+1) 2501-1-(M+1), stream 1-1 data symbol (M+2) 2501-1-(M+2), stream 1-2 data symbol (N) 3101-N, stream 1-2 data symbol (N+1) 3101-(N+1), stream 1-2 data symbol (N+2) 3101-(N+2), stream 2-1 data symbol (1) 3501-1, stream 2-1 data symbol (2) 3501-2, and stream 2-1 data symbol (3) 3501-3 are as described in the above-described embodiment.

[0515] exist Fig. 9 , Fig.14 , Fig.25 , Fig.31 , Fig.32 , Fig.35 In the case of transmitting each data symbol, a single carrier transmission method or a multi-carrier transmission method such as OFDM can be used. In addition, the temporal position of the data symbol is not affected by the Fig. 9 , Fig.14 , Fig.25 , Fig.31 , Fig.32 , Fig.35 limited.

[0516] And, in Fig.25 , Fig.31 , Fig.32 , Fig.35Although the horizontal axis is described as time, the same implementation is possible even if the horizontal axis is set as frequency (carrier). In addition, when the horizontal axis is set as frequency (carrier), the base station uses more than one carrier or subcarrier to send each data symbol.

[0517] (Supplement 3)

[0518] The base station can also Fig. 9 As in the frame structure of , in the time period when symbol group #1 901-1 of stream 1, symbol group #2 901-2 of stream 1, symbol group #3 901-3 of stream 1, symbol group #1 902-1 of stream 2, symbol group #2 902-2 of stream 2, and symbol group #3 902-3 of stream 2 are transmitted, the base station transmits other symbol groups using a transmission beam different from "the transmission beam of symbol group #1 901-1 of stream 1, the transmission beam of symbol group #2 901-2 of stream 1, the transmission beam of symbol group #3 901-3 of stream 1, the transmission beam of symbol group #1 902-1 of stream 2, the transmission beam of symbol group #2 902-2 of stream 2, and the transmission beam of symbol group #3 902-3 of stream 2".

[0519] and, Figure 3 The base station can also generate a transmission beam for the above-mentioned “other code group” through “signal processing by the signal processing unit 102 and signal processing by the weighted synthesis unit 301” or “signal processing by the signal processing unit 102 or signal processing by the weighted synthesis unit 301”.

[0520] In addition, the base station can also Fig.14 As in the frame structure of the modulation signal 1, in the time period when the #1 symbol group 1401-1 of modulation signal 1, the #2 symbol group 1401-2 of modulation signal 1, the #3 symbol group 1401-3 of modulation signal 1, the #1 symbol group 1402-1 of modulation signal 2, the #2 symbol group 1402-2 of modulation signal 2, and the #3 symbol group 1402-3 of modulation signal 2 are transmitted, the base station uses a transmission beam different from the "transmission beam of the #1 symbol group 1401-1 of modulation signal 1, the transmission beam of the #2 symbol group 1401-2 of modulation signal 1, the transmission beam of the #3 symbol group 1401-3 of modulation signal 1, the transmission beam of the #1 symbol group 1402-1 of modulation signal 2, the transmission beam of the #2 symbol group 1402-2 of modulation signal 2, and the transmission beam of the #3 symbol group 1402-3 of modulation signal 2" to transmit other symbol groups.

[0521] At this time, the "other codeword group" can be a codeword group including data codewords destined for a certain terminal, a codeword group including a control information codeword group as described in other parts of the present disclosure, or a codeword group including other data codewords for multicast.

[0522] also, Figure 3 The base station can also generate a transmission beam for the above-mentioned “other code group” through “signal processing by the signal processing unit 102 and signal processing by the weighted synthesis unit 301”, or “signal processing by the signal processing unit 102 or signal processing by the weighted synthesis unit 301”.

[0523] (Supplement 4)

[0524] The base station can also Fig.25 As in the frame structure of the frame, in the time period for transmitting stream 1-1 data symbol (1) 2501-1-1, stream 1-1 data symbol (2) 2501-1-2, and stream 1-1 data symbol (3) 2501-1-3, other symbol groups are transmitted using a transmission beam different from the "transmission beam for transmitting stream 1-1 data symbol (1) 2501-1-1, stream 1-1 data symbol (2) 2501-1-2, and stream 1-1 data symbol (3) 2501-1-3".

[0525] In addition, Fig.25 In the case where the horizontal axis represents frequency, the base station may also transmit other symbol groups during the time period when the stream 1-1 data symbol (1) 2501-1-1, the stream 1-1 data symbol (2) 2501-1-2, and the stream 1-1 data symbol (3) 2501-1-3 are transmitted using a transmission beam different from the "transmission beam for transmitting the stream 1-1 data symbol (1) 2501-1-1, the stream 1-1 data symbol (2) 2501-1-2, and the stream 1-1 data symbol (3) 2501-1-3".

[0526] Furthermore, the base station can also Fig.31 , Fig.32 As in the frame structure of the frame, in the time period when stream 1-1 data symbol (M) 2501-1-M, stream 1-1 data symbol (M+1) 2501-1-(M+1), and stream 1-1 data symbol (M+2) 2501-1-(M+2) are sent, the base station uses a transmission beam different from the "transmission beam for sending stream 1-1 data symbol (M) 2501-1-M, stream 1-1 data symbol (M+1) 2501-1-(M+1), and stream 1-1 data symbol (M+2) 2501-1-(M+2)" to send other codeword groups.

[0527] In addition, Fig.31 , Fig.32In the case where the horizontal axis is frequency, the base station may also transmit other symbol groups in the time period when the stream 1-1 data symbol (M) 2501-1-M, the stream 1-1 data symbol (M+1) 2501-1-(M+1), and the stream 1-1 data symbol (M+2) 2501-1-(M+2) are transmitted. The base station may use a transmission beam different from the "transmission beam for transmitting the stream 1-1 data symbol (M) 2501-1-M, the stream 1-1 data symbol (M+1) 2501-1-(M+1), and the stream 1-1 data symbol (M+2) 2501-1-(M+2)".

[0528] Furthermore, the base station can also Fig.31 , Fig.32 As in the frame structure of , in the time period when stream 1-2 data symbol (1) 3101-1, stream 1-2 data symbol (2) 3101-2, and stream 1-2 data symbol (3) 3101-3 are transmitted, the base station uses a transmission beam different from the "transmission beam for transmitting stream 1-2 data symbol (1) 3101-1, stream 1-2 data symbol (2) 3101-2, and stream 1-2 data symbol (3) 3101-3" to transmit other codeword groups.

[0529] In addition, Fig.31 , Fig.32 In the case where the horizontal axis is frequency, the base station may also transmit other symbol groups during the time period when the stream 1-2 data symbol (1) 3101-1, the stream 1-2 data symbol (2) 3101-2, and the stream 1-2 data symbol (3) 3101-3 are transmitted. The base station may use a transmission beam different from the "transmission beam for transmitting the stream 1-2 data symbol (1) 3101-1, the stream 1-2 data symbol (2) 3101-2, and the stream 1-2 data symbol (3) 3101-3".

[0530] The base station can also Fig.35 As in the frame structure of the frame, in the time period when stream 1-1 data symbol (M) 2501-1-M, stream 1-1 data symbol (M+1) 2501-(M+1), and stream 1-1 data symbol (M+2) 2501-(M+2) are sent, the base station uses a transmission beam different from the "transmission beam for sending stream 1-1 data symbol (M) 2501-1-M, stream 1-1 data symbol (M+1) 2501-(M+1), and stream 1-1 data symbol (M+2) 2501-(M+2)" to send other codeword groups.

[0531] In addition, Fig.35In the case where the horizontal axis is frequency, the base station may also transmit other symbol groups using a transmission beam different from the "transmission beam for transmitting stream 1-1 data symbol (M) 2501-1-M, stream 1-1 data symbol (M+1) 2501-(M+1), and stream 1-1 data symbol (M+2) 2501-(M+2)" during the time period when the base station transmits stream 1-1 data symbol (M) 2501-1-M, stream 1-1 data symbol (M+1) 2501-(M+1), and stream 1-1 data symbol (M+2) 2501-(M+2).

[0532] In addition, the base station can also Fig.35 As in the frame structure of the frame structure, in the time period when stream 1-2 data codeword (N) 3101-N, stream 1-2 data codeword (N+1) 3101-(N+1), and stream 1-2 data codeword (N+2) 3101-(N+2) are sent, the base station uses a transmission beam different from the "transmission beam for sending stream 1-2 data codeword (N) 3101-N, stream 1-2 data codeword (N+1) 3101-(N+1), and stream 1-2 data codeword (N+2) 3101-(N+2)" to send other codeword groups.

[0533] In addition, Fig.35 In the case where the horizontal axis is frequency, the base station may also transmit other symbol groups using a transmission beam different from the "transmission beam for transmitting stream 1-2 data symbol (N) 3101-N, stream 1-2 data symbol (N+1) 3101-(N+1), and stream 1-2 data symbol (N+2) 3101-(N+2)" in the time period when stream 1-2 data symbol (N) 3101-N, stream 1-2 data symbol (N+1) 3101-(N+1), and stream 1-2 data symbol (N+2) 3101-(N+2) are transmitted.

[0534] Furthermore, the base station can also Fig.35 As in the frame structure of the frame, in the time period when stream 2-1 data symbol (1) 3501-1, stream 2-1 data symbol (2) 3501-2, and stream 2-1 data symbol (3) 3501-3 are transmitted, the base station uses a transmission beam different from the "transmission beam for transmitting stream 2-1 data symbol (1) 3501-1, stream 2-1 data symbol (2) 3501-2, and stream 2-1 data symbol (3) 3501-3" to transmit other codeword groups.

[0535] In addition, Fig.35In the case where the horizontal axis represents frequency, the base station may also transmit other symbol groups during the time period when the stream 2-1 data symbol (1) 3501-1, the stream 2-1 data symbol (2) 3501-2, and the stream 2-1 data symbol (3) 3501-3 are transmitted. The base station may use a transmission beam different from the "transmission beam for transmitting the stream 2-1 data symbol (1) 3501-1, the stream 2-1 data symbol (2) 3501-2, and the stream 2-1 data symbol (3) 3501-3".

[0536] In the above description, "other codeword groups" can be a codeword group including data codewords destined for a certain terminal, or as described in other parts of this specification, it can be a codeword group including control information codewords, or it can be a codeword group including other data codewords for multicast.

[0537] at this time, Figure 1 The base station may also generate a transmission beam for the above-mentioned "other symbol group" through signal processing by the signal processing unit 102. Figure 1 The base station may generate a transmission beam for the above-mentioned "other symbol group" by selecting antennas from antenna unit 106-1 to antenna unit 106-M.

[0538] and, Figure 3 The base station can also generate a transmission beam for the above-mentioned “other code group” through “signal processing by the signal processing unit 102 and signal processing by the weighted synthesis unit 301”, or “signal processing by the signal processing unit 102 or signal processing by the weighted synthesis unit 301”.

[0539] Also, you can set Fig.25 , Fig.31 , Fig.32 The unicast transmission intervals 2503-1 and 2503-2 are shown in the figure.

[0540] (Supplement 5)

[0541] In About Fig.31 , Fig.32 In the description, the following is recorded.

[0542] ·“(For multicast) stream 1-1 data symbol (M)” 2501-1-M, “(For multicast) stream 1-1 data symbol (M+1)” 2501-1-(M+1), “(For multicast) stream 1-1 data symbol (M+2)” 2501-1-(M+2), “(For multicast) stream 1-2 data symbol (1)” 3101-1, “(For multicast) stream 1-2 data symbol (2)” 3101-2, and “(For multicast) stream 1-2 data symbol (3)” 3101-3 are all data symbols used to transmit “stream 1”.

[0543] The terminal can obtain "stream 1 data" by obtaining "stream 1-1 data symbols". Furthermore, the terminal can obtain "stream 1 data" by obtaining "stream 1-2 data symbols".

[0544] And, in regard to Fig.35 In the description, the following is recorded.

[0545] ·“(For multicast) stream 1-1 data symbol (M)” 2501-1-M, “(For multicast) stream 1-1 data symbol (M+1)” 2501-1-(M+1), “(For multicast) stream 1-1 data symbol (M+2)” 2501-1-(M+2), “(For multicast) stream 1-2 data symbol (N)” 3101-N, “(For multicast) stream 1-2 data symbol (N+1)” 3101-(N+1), and “(For multicast) stream 1-2 data symbol (N+2)” 3101-(N+2) are all data symbols used to transmit “stream 1”.

[0546] The terminal can obtain "stream 1 data" by obtaining "stream 1-1 data symbols". Furthermore, the terminal can obtain "stream 1 data" by obtaining "stream 1-2 data symbols".

[0547] The following is a supplementary explanation of the above. Fig.35 The above-mentioned effects can be achieved by the following <Method 1-1>, or <Method 1-2>, or <Method 2-1>, or <Method 2-2>.

[0548] <Method 1-1>

[0549] Stream 1-1 data symbol (M) 2501-1-M and stream 1-2 data symbol (N) 3101-N contain the same data.

[0550] Furthermore, stream 1-1 data symbol (M+1) 2501-1-(M+1) and stream 1-2 data symbol (N+1) 3101-(N+1) include the same data.

[0551] Stream 1-1 data symbol (M+2) 2501-1-(M+2) and stream 1-2 data symbol (N+2) 3101-(N+2) contain the same data.

[0552] <Method 1-2>

[0553] There is a stream 1-2 data symbol (L) 3101-L including the same data as that included in the stream 1-1 data symbol (K) 2501-1-K. Here, K and L are integers.

[0554] <Method 2-1>

[0555] Stream 1-1 data symbol (M) 2501-1-M and stream 1-2 data symbol (N) 3101-N include some of the same data.

[0556] Furthermore, stream 1-1 data symbol (M+1) 2501-1-(M+1) and stream 1-2 data symbol (N+1) 3101-(N+1) include a portion of the same data.

[0557] Stream 1-1 data symbol (M+2) 2501-1-(M+2) and stream 1-2 data symbol (N+2) 3101-(N+2) include a portion of the same data.

[0558] <Method 2-2>

[0559] There is a stream 1-2 data symbol (L) 3101-L that includes a portion of the data included in the stream 1-1 data symbol (K) 2501-1-K. In addition, K and L are integers.

[0560] That is, the first base station or the first transmitting system generates a first packet group containing data of the first stream and a second packet group containing data of the first stream, and transmits the packets contained in the first packet group using the first transmitting beam in a first period, and transmits the packets contained in the second packet group using the second transmitting beam different from the first transmitting beam in a second period, and the first period and the second period do not overlap with each other.

[0561] Here, the second packet group may include a second packet including the same data as the data included in the first packet included in the first packet group. Also, as a different structure from the above, the second packet group may include a third packet including the same data as part of the data included in the first packet included in the first packet group.

[0562] Furthermore, the first transmission beam and the second transmission beam may be transmission beams having different directivities transmitted using the same antenna unit, or may be transmission beams transmitted using different antenna units.

[0563] In addition, in addition to the structure of the first base station or the first transmission system, the second base station or the second transmission system also generates a third packet group containing data of the first stream, and transmits the packets contained in the third packet group in a third period using a third transmission beam that is different from the first transmission beam and the second transmission beam, and the third period does not overlap with the first period and the second period.

[0564] Here, the second base station or the second transmission system may repeatedly set the first period, the second period, and the third period in a predetermined order.

[0565] Furthermore, in addition to the structure of the first base station or the first transmission system, the third base station or the third transmission system generates a third packet group including data of the first stream, and transmits the packets included in the third packet group during a third period using a third transmission beam that is different from the first transmission beam and the second transmission beam, and at least a portion of the third period overlaps with the first period.

[0566] Here, the third base station or the third sending system may repeatedly set the first period, the second period and the third period, or at least a part of a certain third period that is repeatedly set may overlap with the first period, or at least one of the third periods that is repeatedly set may not overlap with the first period.

[0567] Furthermore, in addition to the structure of the first base station or the first transmitting system, the fourth base station or the fourth transmitting system generates a fourth packet containing data of the second stream, and transmits the fourth packet in a fourth period using a fourth transmitting beam different from the first transmitting beam, and at least a portion of the fourth period overlaps with the first period.

[0568] In addition, in the above description, although it is described that the first period and the second period do not overlap with each other, the first period and the second period may overlap with each other in part, the entire first period may overlap with the second period, or the entire first period may overlap with the entire second period.

[0569] In addition, the 5th base station or the 5th transmission system can also generate one or more packet groups containing data of the 1st stream, and transmit them using different transmission beams for each packet group, and increase or decrease the number of generated packet groups based on the signal sent from the terminal.

[0570] In addition, although the above is described as "flow", as described elsewhere in this specification, Fig.31 , Fig.32 "stream 1-1 data symbol (M) 2501-1-M, and stream 1-1 data symbol (M+1) 2501-1-(M+1), and stream 1-1 data symbol (M+2) 2501-1-(M+2), and stream 1-2 data symbol (1) 3101-1, and stream 1-2 data symbol (2) 3101-2, stream 1-2 data symbol (3) 3101-3", and Fig.35"Stream 1-1 data symbol (M) 2501-1-M, and stream 1-1 data symbol (M+1) 2501-1-(M+1), stream 1-1 data symbol (M+2) 2501-1-(M+2), and stream 1-2 data symbol (N) 3101-N, and stream 1-2 data symbol (N+1) 3101-(N+1), and stream 1-2 data symbol (N+2) 3101-(N+2)" may be a symbol including data symbols destined for a certain terminal, a symbol including control information symbols, or a symbol including data symbols for multicast.

[0571] (Implementation 4)

[0572] In this embodiment, a specific example of the communication system described in Embodiments 1 to 3 will be described.

[0573] The communication system in this embodiment is composed of (multiple) base stations and multiple terminals. Figure 7 , Fig.12 , Fig.17 , Fig.19 , Fig. 20 , Fig.26 , Fig.29 A communication system consisting of a base station 700 and terminals 704-1, 704-2, etc.

[0574] Fig.37 An example of the structure of a base station (700) is shown.

[0575] The logical channel generation unit 3703 receives the data 3701 and the control data 3702 as input, and outputs a logical channel signal 3704. The logical channel signal 3704 is composed of, for example, "BCCH (Broadcast Control Channel), PCCH (Paging Control Channel), CCCH (Common Control Channel), MCCH (Multicast Control Channel), DCCH (Dedicated Control Channel)" as control logical channels, and "DTCH (Dedicated Traffic Channel), MTCH (Multicast Traffic Channel)" as data logical channels.

[0576] In addition, "BCCH is a downlink channel and a channel for reporting system control information", "PCCH is a downlink channel and a channel for paging information", "CCCH is a downlink channel and a common control channel used when there is no RRC (Radio Resource Control) connection", "MCCH is a downlink channel and a multicast-channel scheduling and control channel used for one-to-many MBMS (Multimedia Broadcast Multicast Service)," "DCCH is a downlink channel and a dedicated control channel used by terminals with RRC connection", "DTCH is a downlink channel and a dedicated service-channel and user-data dedicated channel for one terminal UE (User Equipment)", and "MTCH is a downlink channel and a one-to-many MBMS user-data channel".

[0577] The transmission channel generation unit 3705 receives the logical channel signal 3704 as input, generates and outputs a transmission channel signal 3706. The transmission channel signal 3706 is composed of, for example, BCH (Broadcast Channel), DL-SCH (Downlink Shared Channel), PCH (Paging Channel), MCH (Multicast Channel), etc.

[0578] In addition, "BCH is a channel for system information that is broadcast throughout the cell", "DL-SCH is a channel that uses user-data, control information and system information", "PCH is a channel for paging information that is broadcast throughout the cell", and "MCH is a channel for MBMS services and control that is broadcast throughout the cell".

[0579] The physical channel generation unit 3707 receives the transport channel signal 3706 as input, generates and outputs a physical channel signal 3708. The physical channel signal 3708 is composed of, for example, a PBCH (Physical Broadcast Channel), a PMCH (Physical Multicast Channel), a PDSCH (Physical Downlink Shared Channel), a PDCCH (Physical Downlink Control Channel), and the like.

[0580] In addition, "PBCH is used for transmission of BCH transmission channel", "PMCH is used for transmission of MCH transmission channel", "PDSCH is used for transmission of DL-SCH and transmission channel", and "PDCCH is used for transmission of downlink L1 (Layer 1) / L2 (Layer 2) control signals".

[0581] The modulation signal generating section 3709 receives the physical channel signal 3708 as input, generates and outputs a modulation signal 3710 based on the physical channel signal 3708. Then, the base station 700 transmits the modulation signal 3710 as a radio wave.

[0582] First, consider a case where a base station performs unicast communication with a plurality of terminals, that is, communicates individually.

[0583] At this time, for example Fig. 9 Symbol group #1 of stream 1 of 901-1, symbol group #2 of stream 1 of 901-2, and symbol group #3 of stream 1 of 901-3 may be broadcast channels (i.e., control information that a base station broadcasts to multiple terminals in order to perform data communication with multiple terminals). In addition, control information is, for example, control information required for a base station and a terminal to perform data communication.

[0584] Here, the broadcast channel is described. Among the physical channels (physical channel signal 3708), "PBCH", "PMCH", and "part of PD-SCH" are broadcast channels.

[0585] Furthermore, in the transmission channel (transmission channel signal 3706), "BCH", "part of DL-SCH", "PCH", and "MCH" are broadcast channels.

[0586] Furthermore, in the logical channel (logical channel signal 3704), "BCCH", "CCCH", "MCCH", "part of DTCH", and "MTCH" are broadcast channels.

[0587] Likewise, for example Fig. 9 Symbol group #1 of stream 2 of 902-1, symbol group #2 of stream 2 of 902-2, and symbol group #3 of stream 2 of 902-3 are broadcast channels (i.e., control information that a base station broadcasts to multiple terminals in order to perform data communication with multiple terminals). In addition, control information is, for example, control information required for a base station and a terminal to perform data communication.

[0588] In addition, in the physical channel (physical channel signal 3708), "PBCH", "PMCH", and "part of PD-SCH" are broadcast channels.

[0589] Furthermore, in the transmission channel (transmission channel signal 3706), "BCH", "part of DL-SCH", "PCH", and "MCH" are broadcast channels.

[0590] Furthermore, in the logical channel (logical channel signal 3704), "BCCH", "CCCH", "MCCH", "part of DTCH", and "MTCH" are broadcast channels.

[0591] At this time, about Fig. 9 The characteristics of the symbol group #1 of stream 1 of 901-1, the symbol group #2 of stream 1 of 901-2, and the symbol group #3 of stream 1 of 901-3 are as described in the above-described embodiment, and, Fig. 9 The characteristics of symbol group #1 of stream 2 of 902-1, symbol group #2 of stream 2 of 902-2, and symbol group #3 of stream 2 of 902-3 are as described in the above-described embodiment.

[0592] In addition, about Fig. 9 In the case of transmitting a signal of a broadcast channel, the base station may not transmit the symbol group of stream 2. (In this case, for example, Figure 7 In the example, base station 701 does not send 703-1, 703-2, and 703-3.)

[0593] For example, Fig.14 The symbol group #1 of the modulation signal 1 of 1401-1, the symbol group #2 of the modulation signal 1 of 1401-2, and the symbol group #3 of the modulation signal 1 of 1401-3 may be a broadcast channel (i.e., control information that the base station broadcasts to multiple terminals in order to perform data communication with multiple terminals). In addition, the control information is, for example, control information required by the base station and the terminal to achieve data communication.

[0594] In addition, "PBCH", "PMCH", and "part of PD-SCH" in the physical channel (physical channel signal 3708) are broadcast channels.

[0595] Furthermore, "BCH", "part of DL-SCH", "PCH", and "MCH" in the transport channel (transmission channel signal 3706) are broadcast channels.

[0596] Furthermore, "BCCH", "CCCH", "MCCH", "part of DTCH", and "MTCH" in the logical channel (logical channel signal 3704) are broadcast channels.

[0597] For example, Fig.14 The symbol group #1 of the modulation signal 2 of 1402-1, the symbol group #2 of the modulation signal 2 of 1402-2, and the symbol group #3 of the modulation signal 2 of 1402-3 may be a broadcast channel (i.e., control information that the base station broadcasts to multiple terminals in order to perform data communication with multiple terminals). In addition, the control information is, for example, control information required for the base station and the terminal to achieve data communication.

[0598] In addition, "PBCH", "PMCH", and "part of PD-SCH" in the physical channel (physical channel signal 3708) are broadcast channels.

[0599] Furthermore, "BCH", "part of DL-SCH", "PCH", and "MCH" in the transport channel (transmission channel signal 3706) are broadcast channels.

[0600] Furthermore, "BCCH", "CCCH", "MCCH", "part of DTCH", and "MTCH" in the logical channel (logical channel signal 3704) are broadcast channels.

[0601] In addition, about Fig.14 The characteristics of the symbol group #1 of the modulation signal 1 of 1401-1, the symbol group #2 of the modulation signal 1 of 1401-2, and the symbol group #3 of the modulation signal 1 of 1401-3 are as described in the above-described embodiment. Fig.14 The characteristics of code group #1 of modulation signal 2 of 1402-1, code group #2 of modulation signal 2 of 1402-2, and code group #3 of modulation signal 2 of 1402-3 are as described in the above-described embodiment.

[0602] For example, Fig.25 The stream 1-1 data symbol (1) of 2501-1-1, the stream 1-1 data symbol (2) of 2501-1-2, and the stream 1-1 data symbol (3) of 2501-1-3 may be a broadcast channel (i.e., control information that a base station broadcasts to multiple terminals in order to perform data communication with multiple terminals). In addition, the control information is, for example, control information required by the base station and the terminal to achieve data communication.

[0603] In addition, "PBCH", "PMCH", and "part of PD-SCH" in the physical channel (physical channel signal 3708) are broadcast channels.

[0604] Furthermore, "BCH", "part of DL-SCH", "PCH", and "MCH" in the transport channel (transmission channel signal 3706) are broadcast channels.

[0605] Furthermore, "BCCH", "CCCH", "MCCH", "part of DTCH", and "MTCH" in the logical channel (logical channel signal 3704) are broadcast channels.

[0606] In addition, about Fig.25 The features of the stream 1-1 data symbol (1) of 2501-1-1, the stream 1-1 data symbol (2) of 2501-1-2, and the stream 1-1 data symbol (3) of 2501-1-3 are as described in the above-described embodiment.

[0607] For example, Fig.31 , Fig.32 The stream 1-1 data symbol (M) of 2501-1-M, the stream 1-1 data symbol (M+1) of 2501-1-(M+1), the stream 1-1 data symbol (M+2) of 2501-1-(M+2), the stream 1-2 data symbol (1) of 3101-1, the stream 1-2 data symbol (2) of 3101-2, and the stream 1-2 data symbol (3) of 3101-3 may be a broadcast channel (i.e., control information that the base station broadcasts to multiple terminals in order to communicate data with the multiple terminals). In addition, the control information is, for example, control information required by the base station and the terminal to achieve data communication.

[0608] In addition, "PBCH", "PMCH", and "part of PD-SCH" in the physical channel (physical channel signal 3708) are broadcast channels.

[0609] Furthermore, "BCH", "part of DL-SCH", "PCH", and "MCH" in the transport channel (transmission channel signal 3706) are broadcast channels.

[0610] Furthermore, "BCCH", "CCCH", "MCCH", "part of DTCH", and "MTCH" in the logical channel (logical channel signal 3704) are broadcast channels.

[0611] In addition, about Fig.31 , Fig.32 The characteristics of the stream 1-1 data codeword (M) of 2501-1-M, the stream 1-1 data codeword (M+1) of 2501-1-(M+1), the stream 1-1 data codeword (M+2) of 2501-1-(M+2), the stream 1-2 data codeword (1) of 3101-1, the stream 1-2 data codeword (2) of 3101-2, and the stream 1-2 data codeword (3) of 3101-3 are as described in the above-described embodiment.

[0612] For example, in Fig.35 In the embodiment, the stream 1-1 data symbol (M) of 2501-1-M, the stream 1-1 data symbol (M+1) of 2501-1-(M+1), the stream 1-1 data symbol (M+2) of 2501-1-(M+2), the stream 1-2 data symbol (N) of 3101-N, the stream 1-2 data symbol (N+1) of 3101-(N+1), and the stream 1-2 data symbol (N+2) of 3101-(N+2) may be a broadcast channel (i.e., the base station broadcasts control information to multiple terminals in order to communicate data with the multiple terminals). In addition, the control information is, for example, the control information required by the base station and the terminal to achieve data communication.

[0613] In addition, "PBCH", "PMCH", and "part of PD-SCH" in the physical channel (physical channel signal 3708) are broadcast channels.

[0614] Furthermore, "BCH", "part of DL-SCH", "PCH", and "MCH" in the transport channel (transmission channel signal 3706) are broadcast channels.

[0615] Furthermore, "BCCH", "CCCH", "MCCH", "part of DTCH", and "MTCH" in the logical channel (logical channel signal 3704) are broadcast channels.

[0616] For example, Fig.35 The data symbol (1) of stream 2-1 of 3501-1, the data symbol (2) of stream 2-1 of 3501-2, and the data symbol (3) of stream 2-1 of 3501-3 may be a broadcast channel (i.e., control information that a base station broadcasts to multiple terminals in order to perform data communication with multiple terminals). In addition, the control information is, for example, control information required by the base station and the terminal to implement data communication.

[0617] In addition, "PBCH", "PMCH", and "part of PD-SCH" in the physical channel (physical channel signal 3708) are broadcast channels.

[0618] Furthermore, "BCH", "part of DL-SCH", "PCH", and "MCH" in the transport channel (transmission channel signal 3706) are broadcast channels.

[0619] Furthermore, "BCCH", "CCCH", "MCCH", "part of DTCH", and "MTCH" in the logical channel (logical channel signal 3704) are broadcast channels.

[0620] In addition, Fig.35In the embodiment described above, the features of the stream 1-1 data symbol (M) of 2501-1-M, the stream 1-1 data symbol (M+1) of 2501-1-(M+1), the stream 1-1 data symbol (M+2) of 2501-1-(M+2), the stream 1-2 data symbol (N) of 3101-N, the stream 1-2 data symbol (N+1) of 3101-(N+1), and the stream 1-2 data symbol (N+2) of 3101-(N+2) are as described in the embodiment described above. Fig.35 The features of the stream 2-1 data symbol (1) of 3501-1, the stream 2-1 data symbol (2) of 3501-2, and the stream 2-1 data symbol (3) of 3501-3 are as described in the above-described embodiment.

[0621] exist Fig. 9 , Fig.14 , Fig.25 , Fig.31 , Fig.32 , Fig.35 In the case of transmitting each data symbol, a single carrier transmission method or a multi-carrier transmission method such as OFDM can be used. Furthermore, the temporal position of the data symbol is not affected by the Fig. 9 , Fig.14 , Fig.25 , Fig.31 , Fig.32 , Fig.35 limited.

[0622] And, in Fig.25 , Fig.31 , Fig.32 , Fig.35 In the description, although the horizontal axis is set to time, the same implementation can be achieved even if the horizontal axis is set to frequency (carrier). In addition, when the horizontal axis is set to frequency (carrier), the base station transmits each data symbol using one or more carriers or subcarriers.

[0623] In addition, Fig. 9 The symbol group of stream 1 may also include data (or symbols) sent to each terminal (data for unicast). Fig. 9 The symbol group of stream 2 may include data (or symbols) (data for unicast) to be sent to each terminal.

[0624] exist Fig.14 The symbol group of stream 1 may include data (or symbols) sent to each terminal (data for unicast). Fig.14 The symbol group of stream 2 may include data (or symbols) (data for unicast) to be sent to each terminal.

[0625] and, Fig.25 The codewords of stream 1-1 may include data (data for unicast) (or codewords) to be transmitted to each terminal. Fig.31 , Fig.32 The symbols of stream 1-1 and stream 1-2 may include data (data for unicast) (or symbols) to be transmitted to each terminal.

[0626] Furthermore, the PBCH may be configured, for example, to be "used when transmitting the minimum information (system bandwidth, system frame number, number of transmit antennas, etc.) that the UE should read first after performing a cell search."

[0627] For example, PMCH may be configured to be "used in the operation of MBSFN (Multicast-broadcast single-frequency network)".

[0628] For example, the PDSCH may be a "shared data channel for transmitting downlink user data, which aggregates and transmits all data irrelevant to the C (control)-plane / U (user)-plane."

[0629] For example, the PDCCH is configured to be “used when notifying the user selected by the eNodeB (gNodeB) (base station) through scheduling of the allocation information of the radio resource”.

[0630] By carrying out the above-mentioned implementation, in multicast / broadcast data transmission, the base station can send data codewords and control information codewords using multiple transmission beams, and the terminal can selectively receive beams with good quality from multiple transmission beams. Accordingly, the terminal can obtain the effect of higher data reception quality by performing data codeword reception.

[0631] (Implementation method 5)

[0632] In this embodiment, the base station (700) sends Fig. 9 The structures of the symbol groups of stream 1 and stream 2 are supplemented with explanations.

[0633] Fig.38 An example of the frame structure of stream 1 sent by the base station (700) is shown. Fig.38 In the frame structure, the horizontal axis is time and the vertical axis is frequency, showing the frame structure from time 1 to time 10 and from carrier 1 to carrier 40. Therefore, Fig.38 This is a frame structure of a multi-carrier transmission method such as the OFDM (Orthogonal Frequency Division Multiplexing) method.

[0634] Fig.38 The codeword area 3801_1 of stream 1 in is set to exist from time 1 to time 10 and carrier 1 to carrier 9.

[0635] The symbol group #i (3800_i) of stream 1 is assumed to exist from time 1 to time 10 and from carrier 10 to carrier 20. In addition, the symbol group #i (3800_i) of stream 1 is equivalent to Fig. 9 Codeword group #i (901-i) of stream 1.

[0636] The symbol area 3801_2 of stream 1 is set to exist from time 1 to time 10 and carrier 21 to carrier 40.

[0637] At this time, for example, as described in Embodiment 4, when the base station performs independent data transmission (unicast) to one or more terminals, it is possible to use Fig.38 Codeword areas 3801_1 and 3801_2 of stream 1.

[0638] and, Fig.38 Symbol group #i (3800_i) of stream 1 is used when the base station transmits data for multicast as described in Embodiment 1, Embodiment 4, etc.

[0639] Fig.39 An example of the frame structure of stream 2 sent by the base station (700) is shown. Fig.39 In the frame structure, the horizontal axis is time and the vertical axis is frequency, showing the frame structure from time 1 to time 10 and carrier 1 to carrier 40. Therefore, Fig.39 This becomes a frame of a multi-carrier transmission method such as the OFDM method.

[0640] Fig.39 The codeword area 3901_1 of stream 2 in is set to exist from time 1 to time 10 and carrier 1 to carrier 9.

[0641] The symbol group #i (3900_i) of stream 2 is assumed to exist from time 1 to time 10 and from carrier 10 to carrier 20. In addition, the symbol group #i (3900_i) of stream 2 is equivalent to Fig. 9 Codeword group #i (902-i) of stream 2.

[0642] The symbol area 3901_2 of stream 2 is set to exist from time 1 to time 10 and carrier 21 to carrier 40.

[0643] At this time, as described in Embodiment 4, for example, when the base station performs independent data transmission (unicast) to one or more terminals, it is possible to use Fig.39 Codeword areas 3901_1 and 3901_2 of stream 2.

[0644] and, Fig.39 Symbol group #i (3900_i) of stream 2 is used when the base station transmits data for multicast, as described in Embodiment 1, Embodiment 4, etc.

[0645] In addition, the base station will Fig.38 At the moment X (in Fig.38 In the case of X being an integer greater than or equal to 1 and less than or equal to 10), carrier Y (in Fig.38 In the case of Y being an integer greater than or equal to 1 and less than or equal to 40), the codeword and Fig.39 The code element of time X and carrier Y is sent using the same frequency and the same time.

[0646] And, about Fig. 9 The characteristics of the symbol group #1 of stream 1 of 901-1, the symbol group #2 of stream 1 of 901-2, and the symbol group #3 of stream 1 of 901-3 are as described in the above-described embodiment. Fig.38 The characteristics of the code group #i of stream 1 are the same as Fig. 9 The symbol group of stream 1 is the same as described in the above-described embodiment.

[0647] And, about Fig. 9 The characteristics of the symbol group #1 of stream 2 of 902-1, the symbol group #2 of stream 2 of 902-2, and the symbol group #3 of stream 2 of 902-3 are as described in the above-described embodiment. Fig.39 The characteristics of the code group #i of stream 2 are the same as Fig. 9 The symbol group of stream 2 is the same as described in the above-described embodiment.

[0648] in addition, Fig.38 , Fig.39 When there are code elements after time 11 in carrier 10 to carrier 20 of the frame structure, it can be used in multicast transmission or in individual data transmission (unicast transmission).

[0649] In addition, the base station Fig.38 , Fig.39 In the frame structure of Fig. 9 In the case of the frame shown, the same implementation as in Embodiment 1 and Embodiment 4 is performed.

[0650] Through the above implementation, in multicast / broadcast data transmission, the base station sends data codewords and control information codewords using multiple transmission beams, and the terminal selectively receives a beam with good quality from the multiple transmission beams. Accordingly, the terminal can obtain an effect of higher data reception quality at the terminal by receiving the data codewords.

[0651] (Implementation method 6)

[0652] In this embodiment, the base station (700) sends Fig.14 The structures of the code group of modulation signal 1 and the code group of modulation signal 2 are supplemented with explanation.

[0653] Fig.40 An example of a frame structure of a modulated signal 1 sent by a base station (700) is shown. Fig.40 In the frame structure, the horizontal axis is time and the vertical axis is frequency, showing the frame structure from time 1 to time 10 and carrier 1 to carrier 40. Therefore, Fig.40 This is a frame structure of a multi-carrier transmission method such as the OFDM (Orthogonal Frequency Division Multiplexing) method.

[0654] Fig.40 The code element area 4001_1 of the modulation signal 1 is set to exist from time 1 to time 10 and carrier 1 to carrier 9.

[0655] Symbol group #i (4000_i) of modulation signal 1 is assumed to exist from time 1 to time 10 and from carrier 10 to carrier 20. In addition, symbol group #i (4000_i) of modulation signal 1 is equivalent to Fig.14 Code group #i (1401-i) of the modulation signal 1.

[0656] The code element area 4001_2 of the modulated signal 1 is set to exist from time 1 to time 10 and carrier 21 to carrier 40.

[0657] At this time, as described in Embodiment 4, for example, when the base station performs independent data transmission (unicast) for one or more terminals, it is possible to use Fig.40 Codeword areas 4001_1 and 4001_2 of stream 1.

[0658] therefore, Fig.40 The symbol group #i (4000_i) of the modulated signal 1 is used in the transmission of data for multicast in the base station as described in Implementation Example 1, Implementation Example 4, etc.

[0659] Fig.41 An example of a frame structure of a modulated signal 2 sent by a base station (700) is shown. Fig.41 In the frame structure, the horizontal axis is time and the vertical axis is frequency, showing the frame structure from time 1 to time 10 and carrier 1 to carrier 40. Therefore, Fig.41 This becomes a frame of a multi-carrier transmission method such as the OFDM method.

[0660] Fig.41The code element area 4101_1 of the modulation signal 2 is set to exist from time 1 to time 10 and carrier 1 to carrier 9.

[0661] Symbol group #i (4100_i) of modulation signal 2 is set to exist from time 1 to time 10 and from carrier 10 to carrier 20. In addition, symbol group #i (4100_i) of modulation signal 2 is equivalent to Fig.14 Code group #i (1402-i) of the modulation signal 2.

[0662] The code element area 4101_2 of the modulation signal 2 is set to exist from time 1 to time 10 and carrier 21 to carrier 40.

[0663] At this time, as described in Embodiment 4, for example, when the base station performs independent data transmission (unicast) for one or more terminals, it is possible to use Fig.41 Code element areas 4101_1 and 4101_2 of the modulation signal 2.

[0664] therefore, Fig.41 The codeword group #i (4100_i) of the modulated signal 2 is used in the transmission of data for multicast in the base station as described in Implementation Example 1, Implementation Example 4, etc.

[0665] In addition, the base station will Fig.40 At the moment X (in Fig.40 In the case of X being an integer greater than or equal to 1 and less than or equal to 10), carrier Y (in Fig.40 In the case of Y being an integer greater than or equal to 1 and less than or equal to 40), Fig.41 The code element of time X and carrier Y is sent using the same frequency and the same time.

[0666] Therefore, about Fig.14 The characteristics of the symbol group #1 of the stream 1 of 1401_1, the symbol group #2 of the modulated signal 1 of 1401_2, and the symbol group #3 of the modulated signal 1 of 1401_3 are as described in the above-described embodiment. Fig.40 The characteristics of the code group #i of the modulation signal 1 are the same as Fig.14 The codeword group of the modulated signal 1 is the same as described in the above-described embodiment.

[0667] And, about Fig.14 The characteristics of the code group #1 of the modulation signal 2 of 1402_1, the code group #2 of the modulation signal 2 of 1402_2, and the code group #3 of the modulation signal 2 of 1402_3 are as described in the above-described embodiment. That is, Fig.41 The characteristics of the code group #i of the modulation signal 2 are Fig.14The code element group of the modulation signal 2 is the same as described in the above-described embodiment.

[0668] In addition, Fig.40 , Fig.41 When there are code elements after time 11 in carrier 10 to carrier 20 of the frame structure, it can be used in multicast transmission or in independent data transmission (unicast transmission).

[0669] In addition, the base station Fig.40 , Fig.41 In the frame structure of Fig.14 In the case of such a frame, the same implementation as described in Implementation Example 1 and Implementation Example 4 can be performed.

[0670] Regarding the above description Fig.38 The symbol areas 3801_1, 3801_2, Fig.39 The symbol areas 3901_1, 3901_2, Fig.40 The code element areas 4001_1, 4001_2, Fig.41 An example of the method of using code element areas 4101_1 and 4102_2 of the modulation signal 2 is described.

[0671] Fig.42 Shows the Fig.38 The symbol areas 3801_1, 3801_2, Fig.39 The symbol areas 3901_1, 3901_2, Fig.40 The code element areas 4001_1, 4001_2, Fig.41 An example of allocating the modulated signal 2 code element area 4101_1, 4102_2" to the terminal. In addition, Fig.42 In the figure, the horizontal axis is time and the vertical axis is frequency (carrier).

[0672] like Fig.42 As shown, for example, Fig.38 The symbol areas 3801_1, 3801_2, Fig.39 The symbol areas 3901_1, 3901_2, Fig.40 The code element areas 4001_1, 4001_2, Fig.41 The code element areas 4101_1 and 4102_2” of the modulation signal 2 are divided and allocated to the terminals. In addition, 4201_1 is a code element group allocated to terminal #1, 4201_2 is a code element group allocated to terminal #2, and 4201_3 is a code element group allocated to terminal #3.

[0673] For example, the base station (700) communicates with the terminal #1, the terminal #2, and the terminal #3. When the base station transmits data to the terminal #1, the base station uses Fig.42 The base station transmits data to terminal #1 using the "symbol group 4201_1 allocated to terminal #1". When the base station transmits data to terminal #2, the base station uses Fig.42 The base station transmits data to terminal #2 using the "symbol group 4201_2 allocated to terminal #2". In addition, when the base station transmits data to terminal #3, the base station uses Fig.42 The base station transmits data to terminal #3 according to “symbol group 4201_3 allocated to terminal #3”.

[0674] In addition, the method of distribution to the terminal is not subject to Fig.42 The frequency band (number of carriers) can be changed over time and can be set arbitrarily. Therefore, the method of allocating the frequency band to the terminal can be changed over time.

[0675] Fig.43 Shown with Fig.42 Different directions Fig.38 The symbol areas 3801_1, 3801_2, Fig.39 The symbol areas 3901_1, 3901_2, Fig.40 The code element areas 4001_1, 4001_2, Fig.41 This is an example of allocation of the modulated signal 2 code element area 4101_1, 4102_2" to the terminal. In addition, Fig.43 In the figure, the horizontal axis is time and the vertical axis is frequency (carrier).

[0676] like Fig.43 As shown, for example, Fig.38 The symbol areas 3801_1, 3801_2, Fig.39 The symbol areas 3901_1, 3901_2, Fig.40 The code element areas 4001_1, 4001_2, Fig.41 The code element areas 4101_1, 4102_2" of the modulation signal 2 are time-divided and frequency-divided to allocate the terminals. Therefore, 4301_1 is a code element group allocated to terminal #1, 4301_2 is a code element group allocated to terminal #2, 4301_3 is a code element group allocated to terminal #3, 4301_4 is a code element group allocated to terminal #4, 4301_5 is a code element group allocated to terminal #5, and 4301_6 is a code element group allocated to terminal #6.

[0677] For example, the base station (700) communicates with terminal #1, terminal #2, terminal #3, terminal #4, terminal #5, and terminal #6. When the base station transmits data to terminal #1, the base station uses Fig.43 The base station transmits data to terminal #1 using the "symbol group 4301_1 allocated to terminal #1". When the base station transmits data to terminal #2, it uses Fig.43 The base station transmits data to terminal #2. When the base station transmits data to terminal #3, the base station uses Fig.43 The base station transmits data to terminal #3. When the base station transmits data to terminal #4, the base station uses Fig.43 The base station transmits data to terminal #4. When the base station transmits data to terminal #5, the base station uses Fig.43 The base station transmits data to terminal #5. When the base station transmits data to terminal #6, the base station uses Fig.43 The base station transmits the data to terminal #6 by using “symbol group 4301_6 allocated to terminal #6”.

[0678] In addition, the method of distribution to the terminal is not subject to Fig.43 The frequency band (number of carriers) and time width can be changed and can be set arbitrarily. Therefore, the allocation method to the terminal can be changed over time.

[0679] And, in Fig.38 , Fig.39 , Fig.40 , Fig.41 The symbol area of ​​stream 1, the symbol area of ​​stream 2, the symbol area of ​​modulated signal 1, and the symbol area of ​​modulated signal 2 can be weighted differently according to the carrier, and the weighted synthesis method can be determined by taking multiple carriers as units. Fig.43 , Fig.44 The weighted synthesis parameters are set for the terminals assigned as shown. The setting of the weighted synthesis method in the carrier is not limited to these examples.

[0680] Through the above implementation, in multicast / broadcast data transmission, the base station sends data codewords and control information codewords using multiple transmission beams, and the terminal selectively receives a beam with good quality from the multiple transmission beams. Accordingly, the terminal can obtain an effect of higher data reception quality at the terminal by receiving the data codewords.

[0681] (Implementation 7)

[0682] In this manual, Figure 7 , Fig.12 , Fig.17 , Fig.18 , Fig.19 , Fig. 20 , Fig. 22 The base station 700 in the embodiment may be a base station structure as described in other embodiments. Fig.44 The structure shown.

[0683] The following Fig.44 The operation of the base station is described below. Fig.44 In Figure 1 , Figure 3 The same operations are assigned the same reference numerals and their description is omitted.

[0684] The weighted synthesis unit 301 receives the processed signals 103_1, 103_2, ..., 103_M and the control signal 159 as input, performs weighted synthesis according to the control signal 159, and outputs weighted synthesis signals 4401_1, 4401_2, ..., 4401_K. Here, M is an integer greater than or equal to 2, and K is an integer greater than or equal to 2.

[0685] For example, let the signal 103_i (i is an integer greater than 1 and less than M) after signal processing be ui(t) (t is time), and let the signal 4401_g (g is an integer greater than 1 and less than K) after weighted synthesis be vg(t), then vg(t) can be expressed by the following formula.

[0686] [Formula 7]

[0687]

[0688] The wireless unit 104_g receives the weighted combined signal 4401_g and the control signal 159 as input, performs predetermined processing according to the control signal 159, generates and outputs a transmission signal 105_g. Then, the transmission signal 105_g is transmitted from the antenna 303_1.

[0689] In addition, the transmission method corresponding to the base station can be a multi-carrier method such as OFDM, or a single-carrier method. Moreover, the base station can correspond to both the multi-carrier method and the single-carrier method. At this time, there are multiple methods for generating a modulation signal of a single-carrier method, and any method can be implemented. For example, examples of single-carrier methods include "DFT (Discrete Fourier Transform)-Spread OFDM (Orthogonal Frequency Division Multiplexing)", "Trajectory Constrained DFT-Spread OFDM", "OFDM based SC (Single Carrier)", "SC (Single Carrier)-FDMA (Frequency Division Multiple Access)", "Guard interval DFT-Spread OFDM", etc.

[0690] Although the equation (7) is expressed as a function of time, in the case of a multi-carrier method such as the OFDM method, it may be a function other than time.

[0691] For example, in the OFDM method, different weighted combination can be performed for each carrier, and the weighted combination method can be determined using a plurality of carriers as a unit. The setting of the weighted combination method in the carrier is not limited to these examples.

[0692] (Supplement 6)

[0693] Of course, the implementation modes, supplements and other contents described in this specification may be implemented in various combinations.

[0694] And, as a base station structure, as an example, is not subject to Figure 1 , Figure 3 Therefore, the present disclosure can be implemented as long as the base station has multiple transmission antennas and generates multiple transmission beams (transmission directional beams) for transmission.

[0695] In addition, each implementation mode is an example. For example, although "modulation method, error correction coding method (error correction code used, code length, coding rate, etc.), control information, etc." are shown as examples, the same structure can be used when other "modulation methods, error correction coding methods (error correction code used, code length, coding rate, etc.), control information, etc." are applied.

[0696] Regarding the modulation method, the embodiments described in this specification and other contents can be implemented even if a modulation method other than the modulation method described in this specification is used. For example, APSK (e.g., 16APSK, 64APSK, 128APSK, 256APSK, 1024APSK, 4096APSK, etc.), PAM (e.g., 4PAM, 8PAM, 16PAM, 64PAM, 128PAM, 256PAM, 1024PAM, 4096PAM, etc.), PSK (e.g., BPSK, QPSK, 8PSK, 16PSK, 64PSK, 128PSK, 256PSK, 1024PSK, 4096PSK, etc.), QAM (e.g., 4QAM, 8QAM, 16QAM, 64QAM, 128QAM, 256QAM, 1024QAM, 4096QAM, etc.) can be applied, and uniform mapping or non-uniform mapping can also be used in each modulation method. Furthermore, the configuration method of 2, 4, 8, 16, 64, 128, 256, 1024, etc. signal points in the IQ plane (modulation method with 2, 4, 8, 16, 64, 128, 256, 1024, etc. signal points) is not limited to the signal point configuration method of the modulation method shown in this specification.

[0697] In this specification, a communication / broadcasting device such as a broadcasting station, a base station, an access point, a terminal, a mobile phone, etc. may be considered as a transmitting device, and a communication device such as a television, a radio, a terminal, a personal computer, a mobile phone, an access point, a base station, etc. may be considered as a receiving device. In addition, the transmitting device and the receiving device in the present disclosure may be considered as a device having a communication function, which is connected to a device such as a television, a radio, a personal computer, a mobile phone, etc. for executing an application via a certain interface. In addition, in this embodiment, the code elements other than the data code elements, such as the pilot code elements (preamble, unique word, postamble, reference code element, etc.), the code elements for control information, etc., may be arranged in any manner in the frame. Moreover, although they are named as pilot code elements and control information code elements here, any naming method is possible, and the important thing is the function itself.

[0698] The pilot symbol may be, for example, a known symbol modulated by PSK modulation in the transceiver, and the receiver uses the symbol to perform frequency synchronization, time synchronization, channel estimation (CSI (Channel State Information) estimation) of each modulated signal, signal detection, etc. Alternatively, the pilot symbol may be synchronized by the receiver, so that the receiver can know the symbol sent by the transmitter.

[0699] In addition, the codewords used for control information are codewords used to transmit information that needs to be transmitted to the communication partner for implementing communications other than data (data of applications, etc.) (for example, the modulation method used in the communication, the error correction coding method, the coding rate of the error correction coding method, setting information in the upper layer, etc.).

[0700] In addition, the present disclosure is not limited to each embodiment, and can be implemented with various modifications. For example, in each embodiment, the case where it is implemented as a communication device is described, but it is not limited to this, and the communication method can also be implemented as software.

[0701] In addition, for example, a program for executing the above-mentioned communication method may be stored in advance in a ROM, and the program may be operated by the CPU.

[0702] Furthermore, a program for executing the above-mentioned communication method may be stored in a computer-readable storage medium, and the program stored in the storage medium may be recorded in a RAM of a computer so that the computer operates according to the program.

[0703] Furthermore, each structure of each of the above-mentioned embodiments and the like can typically be implemented as an integrated circuit, i.e., LSI, having input terminals and output terminals. They can be made into a single chip, or they can be made into a single chip in a manner that includes all or part of the structures of each embodiment. Although it is set as LSI here, it is also called IC, system LSI, super LSI, and ultra-large-scale LSI depending on the degree of integration. In addition, the method of integrated circuitization is not limited to LSI, and can also be implemented by a dedicated circuit or a general-purpose processor. It is also possible to use an FPGA that can be programmed after LSI manufacturing, or a reconfigurable processor that can reconfigure the connection and setting of the circuit unit inside the LSI. Moreover, if a technology for integrated circuitization that replaces LSI appears due to the advancement of semiconductor technology or other derived technologies, then of course, the technology can also be used to integrate functional blocks. It can also be an application of biotechnology.

[0704] Various frame structures are described in this manual. Figure 1 The transmitting device, such as a base station (AP), transmits the modulated signal of the frame structure described in this specification using a multi-carrier method such as the OFDM method. At this time, when a terminal (user) communicating with the base station (AP) transmits a modulated signal, an application method in which the modulated signal transmitted by the terminal is a single-carrier method can be considered. (The base station (AP) can simultaneously transmit data symbol groups to multiple terminals by using the OFDM method, and the terminals use a single-carrier method, thereby reducing power consumption.)

[0705] Alternatively, the terminal may use a portion of the frequency band used for the modulated signal transmitted by the base station (AP) and apply a TDD (Time Division Duplex) transmission modulation method.

[0706] Figure 1 The structure of the antenna units 106-1, 106-2, ..., 106-M is not limited to the structure described in the embodiment. For example, the antenna units 106-1, 106-2, ..., 106-M may not be composed of multiple antennas, and the antenna units 106-1, 106-2, ..., 106-M may not use the signal 159 as input.

[0707] Figure 4 The structure of antenna units 401-1, 401-2, ..., 401-N is not limited to the structure described in the embodiment. For example, antenna units 401-1, 401-2, ..., 401-N may not be composed of multiple antennas, and antenna units 401-1, 401-2, ..., 401-N may not take signal 410 as input.

[0708] In addition, the base station's transmission method for the terminal can be a multi-carrier method such as OFDM, or a single-carrier method. Moreover, the base station can also correspond to both the multi-carrier method and the single-carrier method. At this time, there are multiple methods for generating a modulation signal of a single-carrier method, and any method can be implemented. For example, examples of single-carrier methods include "DFT (Discrete Fourier Transform)-Spread OFDM (Orthogonal Frequency Division Multiplexing)", "Trajectory Constrained DFT-Spread OFDM", "OFDM based SC (Single Carrier)", "SC (Single Carrier)-FDMA (Frequency Division Multiple Access)", "Guard interval DFT-Spread OFDM", etc.

[0709] And, in Figure 1 , Figure 3 , Fig.44 Among the information #1 (101_1), information #2 (101_2), ..., information #M (101_M), at least multicast (broadcast) data exists. Figure 1 In the case where information #1 (101_1) is data for multicast, a plurality of streams or modulated signals including the data are generated by the signal processing unit 102 and output from the antenna.

[0710] exist Figure 3 In the case where information #1 (101_1) is data for multicast, multiple streams or modulated signals containing the data are generated by the signal processing unit 102 and / or the weighted synthesis unit 301 and output from the antenna.

[0711] exist Fig.44 In the case where information #1 (101_1) is data for multicast, multiple streams or modulated signals containing the data are generated by the signal processing unit 102 and / or the weighted synthesis unit 301 and output from the antenna.

[0712] In addition, regarding the status of multiple streams or modulated signals, such as using Figure 7 , Fig. 9 , Fig.12 , Fig.14 , Fig.17 , Fig.18 , Fig.19 As explained above.

[0713] Moreover, in Figure 1 , Figure 3 , Fig.44 The information #1 (101_1), information #2 (101_2), ..., information #M (101_M) in the data may also include data destined for an individual terminal. This is as described in the embodiment of this specification.

[0714] In addition, at least one of the FPGA (Field Programmable Gate Array) and the CPU (Central Processing Unit) can be configured to download all or part of the software required to implement the communication method described in the present disclosure through wireless communication or wired communication. Moreover, it can be configured to download all or part of the software for updating through wireless communication or wired communication. Moreover, the downloaded software can be saved in the storage unit, and at least one of the FPGA and the CPU can be operated according to the saved software to perform the digital signal processing described in the present disclosure.

[0715] At this time, a device having at least one of an FPGA and a CPU can be connected to a communication modem wirelessly or by wire, and the communication method described in the present disclosure can be implemented through the device and the communication modem.

[0716] For example, the communication device such as the base station, AP, terminal, etc. described in this specification may include at least one of an FPGA and a CPU, and the communication device may include an interface for obtaining software for operating at least one of the FPGA and the CPU from the outside. In addition, the communication device may include a storage unit for storing software obtained from the outside, and the signal processing described in this disclosure may be implemented by operating the FPGA and the CPU according to the stored software.

[0717] (Implementation 8)

[0718] In this embodiment, for example, an example in which data owned by communication device #A is transmitted to a plurality of communication devices will be described.

[0719] Fig.45 An example of a case where data owned by communication device #A is sent to multiple communication devices is shown. For example, communication device #A of 4501 accumulates a first file composed of first data in an accumulation unit, and communication device #A of 4501 sends the first data to communication device #1 of 4502_1, communication device #2 of 4502_2, communication device #3 of 4502_3, and communication device #4 of 4502_4.

[0720] Communication device #4 of 4502_4 transmits the first data obtained from communication device #A of 4501 to server 4506_4 via network 4503.

[0721] right Fig.45 The operations of communication device #A of 4501, communication device #1 of 4502_1, communication device #2 of 4502_2, communication device #3 of 4502_3, and communication device #4 of 4502_4 are described in detail.

[0722] The communication device #A of 4501 has, for example, Figure 1 (or Figure 3 ,or Fig.44 Thus, the communication device #1 of 4502_1, the communication device #2 of 4502_2, the communication device #3 of 4502_3, and the communication device #4 of 4502_4 have, for example, Figure 4 In addition, regarding Figure 1 ( Figure 3 , Fig.44 ) and Figure 4 Since the working of each part has been explained, the explanation is omitted.

[0723] The signal processing unit 102 of the communication device #A of 4501 takes the information 101-1 including the first data and the control signal 159 as input, and performs signal processing according to the information contained in the control signal 159, such as "information about the error correction coding method (coding rate, code length (block length))", "information about the modulation method", and "transmission method (multiplexing method)".

[0724] At this time, the signal processing unit 102 generates a signal processed for transmission to the communication device #1 of 4502_1, a signal processed for transmission to the communication device #2 of 4502_2, a signal processed for transmission to the communication device #3 of 4502_3, and a signal processed for transmission to the communication device #4 of 4502_4 from the information 101-1 including the first data. As an example, the signal processed for transmission to the communication device #1 of 4502_1 is 103-1, the signal processed for transmission to the communication device #2 of 4502_2 is 103-2, the signal processed for transmission to the communication device #3 of 4502_3 is 103-3, and the signal processed for transmission to the communication device #4 of 4502_4 is 103-4.

[0725] Then, the signal 103-1 processed by the signal processing for transmission to the communication device #1 of 4502_1 generates the transmission signal 105-1 via the wireless unit 104-1, and the generated transmission signal 105-1 is transmitted from the antenna unit 106-1. Similarly, the signal 103-2 processed by the signal processing for transmission to the communication device #2 of 4502_2 generates the transmission signal 105-2 via the wireless unit 104-2, and the generated transmission signal 105-2 is transmitted from the antenna unit 106-2. The signal 103-3 processed by the signal processing for transmission to the communication device #3 of 4502_3 generates the transmission signal 105-3 via the wireless unit 104-3, and the generated transmission signal 105-3 is transmitted from the antenna unit 106-3. The signal 103-4 processed by the signal processing for transmission to the communication device #4 of 4502_4 generates the transmission signal 105-4 via the wireless unit 104-4, and the generated transmission signal 105-4 is transmitted from the antenna unit 106-4.

[0726] Here, regarding the method of setting the frequencies of the transmission signals 105-1, 105-2, 105-3, and 105-4, the following is used: Fig.46 Provide explanation.

[0727] exist Fig.46In FIG. 1 , the horizontal axis is set to frequency and the vertical axis is set to power. Transmitted signals 105-1, 105-2, 105-3, and 105-4 are signals having a spectrum of spectrum 4601 in the first frequency band (first channel), a signal having a spectrum of spectrum 4602 in the second frequency band (second channel), and a signal having a spectrum of spectrum 4603 in the third frequency band (third channel).

[0728] For a specific example, use Fig.47 , Fig.48 , Fig.49 , Fig.50 Provide explanation.

[0729] Fig.47 Shows Fig.45 The positional relationship of the communication device #A of 4501, the communication device #1 of 4502_1, the communication device #2 of 4502_2, the communication device #3 of 4502_3, and the communication device #4 of 4502_4. Fig.47 Recorded in Fig.45 The additional number in the .

[0730] exist Fig.47 In the case of 4501, the communication device #A can use the spectrum used as the transmission signal 105-1 sent to the communication device #1 of 4502_1. Fig.46 The spectrum 4601 of the first frequency band can be used as the spectrum used by the transmission signal 105-2 sent to the communication device #2 of 4502_2. Fig.46 The spectrum 4601 of the first frequency band can be used as the spectrum used by the transmission signal 105-3 of the communication device #3 sent to 4502_3. Fig.46 The spectrum 4601 of the first frequency band is used as the spectrum used by the transmission signal 105-4 of the communication device #4 sent to 4502_4, which can Fig.46 In this way, the same setting can be made for "the frequency band used by the transmission signal of the communication device #1 sent to 4502_1", "the frequency band used by the transmission signal of the communication device #2 sent to 4502_2", "the frequency band used by the transmission signal of the communication device #3 sent to 4502_3", and "the frequency band used by the transmission signal of the communication device #4 sent to 4502_4". This can achieve the effect of improving the frequency utilization efficiency.

[0731] Here, the temporal existence of "transmission signal 105-1 sent to communication device #1 of 4502_1", "transmission signal 105-2 sent to communication device #2 of 4502_2", "transmission signal 105-3 sent to communication device #3 of 4502_3", and "transmission signal 105-4 sent to communication device #4 of 4502_4" is explained.

[0732] Fig.51 FIG. 4 shows an example of a frame structure of a modulated signal transmitted by communication device A of 4501, and shows an example of the configuration of code elements in the horizontal axis time. Fig.51 , 5101-1 represents a data symbol group for communication device #1 of 4502_1, or a part of a data symbol group for communication device #1 of 4502_1, 5101-2 represents a data symbol group for communication device #2 of 4502_2, or a part of a data symbol group for communication device #2 of 4502_2, 5101-3 represents a data symbol group for communication device #3 of 4502_3, or a part of a data symbol group for communication device #3 of 4502_3, and 5101-4 represents a data symbol group for communication device #4 of 4502_4, or a part of a data symbol group for communication device #4 of 4502_4.

[0733] “The data symbol group for communication device #1 of 4502_1, or a part of the data symbol group for communication device #1 of 4502_1” 5101_1, “the data symbol group for communication device #2 of 4502_2, or a part of the data symbol group for communication device #2 of 4502_2” 5101-2, “the data symbol group for communication device #3 of 4502_3, or a part of the data symbol group for communication device #3 of 4502_3” 5101_3, and “the data symbol group for communication device #4, or a part of the data symbol group for communication device #4 of 4502_4” 5101_4 all exist in time interval 1.

[0734] Fig.48 Shows Fig.45 The communication device #A of 4501, the communication device #1 of 4502_1, the communication device #2 of 4502_2, the communication device #3 of 4502_3, the communication device #4 of 4502_4 and Fig.47 Therefore, in Fig.48 Recorded in Fig.45 The additional number in the .

[0735] exist Fig.48 In the case of, in the communication device #A of 4501, the spectrum used as the transmission signal 105-1 sent to the communication device #1 of 4502_1 is used. Fig.46The spectrum 4601 of the first frequency band is used as the spectrum used by the transmission signal 105-2 sent to the communication device #2 of 4502_2, and the spectrum 4601 of the first frequency band is used as the spectrum used by the communication device #2 of 4502_2 Fig.46 The spectrum 4601 of the first frequency band is used as the spectrum used by the transmission signal 105-3 sent to the communication device #3 of 4502_3, and the spectrum 4601 of the first frequency band is used. Fig.46 The spectrum 4601 of the first frequency band is used as the spectrum used by the transmission signal 105-4 sent to the communication device #4 of 4502_4. Fig.46 At this time, the frequency band used by the transmission signal 105-3 sent to the communication device #3 of 4502_3 is different from the frequency band used by the transmission signal 105-4 sent to the communication device #4 of 4502_4 because if the transmission device #A of 4501 makes "the frequency band used by the transmission signal 105-3 sent to the communication device #3 of 4502_3 and the frequency band used by the transmission signal 105-4 sent to the communication device #4 of 4502_4" the same, it will be difficult for the communication devices #3 of 4502_3 and #4 of 4502_4 to separate the transmission beams, so that interference will increase, and thus the reception quality of data will be reduced.

[0736] As described above, it is possible to ensure high data reception quality and to obtain an effect of improving frequency utilization efficiency.

[0737] Here, the temporal existence of "transmission signal 105-1 sent to communication device #1 of 4502_1", "transmission signal 105-2 sent to communication device #2 of 4502_2", "transmission signal 105-3 sent to communication device #3 of 4502_3", and "transmission signal 105-4 sent to communication device #4 of 4502_4" is explained.

[0738] Fig.51 FIG. 4 shows an example of a frame structure of a modulated signal transmitted by communication device A of 4501, and shows an example of the configuration of code elements in the horizontal axis time. Fig.51 , 5101-1 represents a data symbol group for communication device #1 of 4502_1, or a part of a data symbol group for communication device #1 of 4502_1, 5101-2 represents a data symbol group for communication device #2 of 4502_2, or a part of a data symbol group for communication device #2 of 4502_2, 5101-3 represents a data symbol group for communication device #3 of 4502_3, or a part of a data symbol group for communication device #3 of 4502_3, and 5101-4 represents a data symbol group for communication device #4 of 4502_4, or a part of a data symbol group for communication device #4 of 4502_4.

[0739] “The data symbol group for communication device #1 of 4502_1, or a part of the data symbol group for communication device #1 of 4502_1” 5101_1, “the data symbol group for communication device #2 of 4502_2, or a part of the data symbol group for communication device #2 of 4502_2” 5101-2, “the data symbol group for communication device #3 of 4502_3, or a part of the data symbol group for communication device #3 of 4502_3” 5101_3, and “the data symbol group for communication device #4, or a part of the data symbol group for communication device #4 of 4502_4” 5101_4 all exist in time interval 1.

[0740] In addition, Fig.47 The same is true for the case where the communication device #A of 4501 can use the spectrum used for the transmission signal 105-1 sent to the communication device #1 of 4502_1. Fig.46 The spectrum 4601 of the first frequency band can be used as the spectrum used by the transmission signal 105-2 sent to the communication device #2 of 4502_2. Fig.46 The spectrum 4601 of the first frequency band can be used as the spectrum used by the transmission signal 105-3 of the communication device #3 sent to 4502_3. Fig.46 The spectrum 4601 of the first frequency band can be used as the spectrum used by the transmission signal 105-4 of the communication device #4 sent to 4502_4. Fig.46 The spectrum 4602 of the second frequency band.

[0741] Fig.49 Shows Fig.45 The communication device #A of 4501, the communication device #1 of 4502_1, the communication device #2 of 4502_2, the communication device #3 of 4502_3, the communication device #4 of 4502_4 and Fig.47 , Fig.48 Different positional relationships. Fig.49 Recorded in Fig.45 The additional number in the .

[0742] exist Fig.49 In the case of 4501, the communication device #A uses the spectrum used as the transmission signal 105-1 sent to the communication device #1 of 4502_1. Fig.46 The spectrum 4601 of the first frequency band is used as the spectrum used by the transmission signal 105-2 sent to the communication device #2 of 4502_2, and the spectrum 4601 of the first frequency band is used as the spectrum used by the communication device #2 of 4502_2 Fig.46 The spectrum 4602 of the second frequency band is used as the spectrum used by the transmission signal 105-3 sent to the communication device #3 of 4502_3. Fig.46The spectrum 4602 of the second frequency band is used as the spectrum used by the transmission signal 105-4 sent to the communication device #4 of 4502_4. Fig.46 At this time, the frequency band used by the transmission signal 105-1 sent to the communication device #1 of 4502_1, the frequency band used by the transmission signal 105-3 sent to the communication device #3 of 4502_3, and the frequency band used by the transmission signal 105-4 sent to the communication device #4 of 4502_4 are different because if the transmission device #A of 4501 makes "the frequency band used by the transmission signal 105-1 sent to the communication device #1 of 4502_1, the frequency band used by the transmission signal 105-3 sent to the communication device #3 of 4502_3, and the frequency band used by the transmission signal 105-4 sent to the communication device #4 of 4502_4" the same, it will be difficult for the communication device #1 of 4502_1, the communication device #3 of 4502_3, and the communication device #4 of 4502_4 to separate the transmission beams, so that interference increases, which will lead to a decrease in the reception quality of data.

[0743] As described above, it is possible to ensure high data reception quality and to obtain an effect of improving frequency utilization efficiency.

[0744] Here, the temporal existence of "transmission signal 105-1 sent to communication device #1 of 4502_1", "transmission signal 105-2 sent to communication device #2 of 4502_2", "transmission signal 105-3 sent to communication device #3 of 4502_3", and "transmission signal 105-4 sent to communication device #4 of 4502_4" is explained.

[0745] Fig.51 FIG. 4 shows an example of a frame structure of a modulated signal transmitted by communication device A of 4501, and shows an example of the configuration of code elements in the horizontal axis time. Fig.51 , 5101-1 represents a data symbol group for communication device #1 of 4502_1, or a part of a data symbol group for communication device #1 of 4502_1, 5101-2 represents a data symbol group for communication device #2 of 4502_2, or a part of a data symbol group for communication device #2 of 4502_2, 5101-3 represents a data symbol group for communication device #3 of 4502_3, or a part of a data symbol group for communication device #3 of 4502_3, and 5101-4 represents a data symbol group for communication device #4 of 4502_4, or a part of a data symbol group for communication device #4 of 4502_4.

[0746] “The data symbol group for communication device #1 of 4502_1, or a part of the data symbol group for communication device #1 of 4502_1” 5101_1, “the data symbol group for communication device #2 of 4502_2, or a part of the data symbol group for communication device #2 of 4502_2” 5101-2, “the data symbol group for communication device #3 of 4502_3, or a part of the data symbol group for communication device #3 of 4502_3” 5101_3, and “the data symbol group for communication device #4, or a part of the data symbol group for communication device #4 of 4502_4” 5101_4 all exist in time interval 1.

[0747] In addition, Fig.47 The same is true for the case where the communication device #A of 4501 can use the spectrum used for the transmission signal 105-1 sent to the communication device #1 of 4502_1. Fig.46 The spectrum 4601 of the first frequency band can be used as the spectrum used by the transmission signal 105-2 sent to the communication device #2 of 4502_2. Fig.46 The spectrum 4602 of the second frequency band can be used as the spectrum used by the transmission signal 105-3 of the communication device #3 sent to 4502_3. Fig.46 The spectrum 4602 of the second frequency band can be used as the spectrum used by the transmission signal 105-4 of the communication device #4 sent to 4502_4. Fig.46 The spectrum of the 3rd band is 4603.

[0748] Fig.50 Shows Fig.45 The communication device #A of 4501, the communication device #1 of 4502_1, the communication device #2 of 4502_2, the communication device #3 of 4502_3, the communication device #4 of 4502_4 and Fig.47 , Fig.48 , Fig.49 Therefore, in Fig.50 Record Fig.45 The additional number in the .

[0749] exist Fig.50 In the case of, in the communication device #A of 4501, the spectrum used as the transmission signal 105-1 sent to the communication device #1 of 4502_1 is used. Fig.46 The spectrum 4601 of the first frequency band is used as the spectrum used by the transmission signal 105-2 sent to the communication device #2 of 4502_2, and the spectrum 4601 of the first frequency band is used as the spectrum used by the communication device #2 of 4502_2 Fig.46 The spectrum 4602 of the second frequency band is used as the spectrum used by the transmission signal 105-3 sent to the communication device #3 of 4502_3. Fig.46The spectrum 4602 of the second frequency band is used as the spectrum used by the transmission signal 105-4 sent to the communication device #4 of 4502_4. Fig.46 The spectrum 4601 of the 1st frequency band.

[0750] At this time, the frequency band used by the transmission signal 105-1 sent to the communication device #1 of 4502_1 is different from the frequency band used by the transmission signal 105-2 sent to the communication device #2 of 4502_2. This is because if the transmission device #A of 4501 makes "the frequency band used by the transmission signal 105-1 sent to the communication device #1 of 4502_1 and the frequency band used by the transmission signal 105-2 sent to the communication device #2 of 4502_2" the same, it will be difficult for the communication devices #1 of 4502_1 and #2 of 4502_2 to separate the transmission beams, so the interference increases, which will lead to a decrease in the data reception quality.

[0751] Similarly, the reason why the frequency band used by the transmission signal 105-3 sent to the communication device #3 of 4502_3 is different from the frequency band used by the transmission signal 105-4 sent to the communication device #4 of 4502_4 is that if the transmission device #A of 4501 makes "the frequency band used by the transmission signal 105-3 sent to the communication device #3 of 4502_3 and the frequency band used by the transmission signal 105-4 sent to the communication device #4 of 4502_4" the same, it will be difficult for the communication devices #3 of 4502_3 and #4 of 4502_4 to separate the transmission beams, so the interference increases, which will lead to a decrease in the data reception quality.

[0752] As described above, it is possible to ensure high data reception quality and to obtain an effect of improving frequency utilization efficiency.

[0753] Here, the temporal existence of "transmission signal 105-1 sent to communication device #1 of 4502_1", "transmission signal 105-2 sent to communication device #2 of 4502_2", "transmission signal 105-3 sent to communication device #3 of 4502_3", and "transmission signal 105-4 sent to communication device #4 of 4502_4" is explained.

[0754] Fig.51 FIG. 4 shows an example of a frame structure of a modulated signal transmitted by communication device A of 4501, and shows an example of the configuration of code elements in the horizontal axis time. Fig.51, 5101-1 represents a data symbol group for communication device #1 of 4502_1, or a part of a data symbol group for communication device #1 of 4502_1, 5101-2 represents a data symbol group for communication device #2 of 4502_2, or a part of a data symbol group for communication device #2 of 4502_2, 5101-3 represents a data symbol group for communication device #3 of 4502_3, or a part of a data symbol group for communication device #3 of 4502_3, and 5101-4 represents a data symbol group for communication device #4 of 4502_4, or a part of a data symbol group for communication device #4 of 4502_4.

[0755] “The data symbol group for communication device #1 of 4502_1, or a part of the data symbol group for communication device #1 of 4502_1” 5101_1, “the data symbol group for communication device #2 of 4502_2, or a part of the data symbol group for communication device #2 of 4502_2” 5101-2, “the data symbol group for communication device #3 of 4502_3, or a part of the data symbol group for communication device #3 of 4502_3” 5101_3, and “the data symbol group for communication device #4, or a part of the data symbol group for communication device #4 of 4502_4” 5101_4 all exist in time interval 1.

[0756] In addition, Fig.47 In the case of the same, in the communication device #A of 4501, the spectrum used as the transmission signal 105-1 sent to the communication device #1 of 4502_1 can be used Fig.46 The spectrum 4601 of the first frequency band can be used as the spectrum used by the transmission signal 105-2 sent to the communication device #2 of 4502_2. Fig.46 The spectrum 4602 of the second frequency band can be used as the spectrum used by the transmission signal 105-3 of the communication device #3 sent to 4502_3. Fig.46 The spectrum 4602 of the second frequency band can be used as the spectrum used by the transmission signal 105-4 of the communication device #4 sent to 4502_4. Fig.46 The spectrum 4601 of the 1st frequency band.

[0757] And, in Fig.50 In the case of 4501, even if the communication device #A of 4501 uses the spectrum used for the transmission signal 105-1 sent to the communication device #1 of 4502_1, Fig.46 The spectrum 4601 of the first frequency band is used as the spectrum used by the transmission signal 105-2 sent to the communication device #2 of 4502_2, and the spectrum 4601 of the first frequency band is used as the spectrum used by the communication device #2 of 4502_2 Fig.46The spectrum 4602 of the second frequency band is used as the spectrum used by the transmission signal 105-3 sent to the communication device #3 of 4502_3. Fig.46 The spectrum 4602 of the second frequency band is used as the spectrum used by the transmission signal 105-4 sent to the communication device #4 of 4502_4. Fig.46 The spectrum 4603 of the third frequency band can also ensure high data reception quality and can achieve the effect of improving frequency utilization efficiency.

[0758] Moreover, in Fig.50 In the case of 4501, even if the communication device #A of 4501 uses the spectrum used for the transmission signal 105-1 sent to the communication device #1 of 4502_1, Fig.46 The spectrum 4601 of the first frequency band is used as the spectrum used by the transmission signal 105-2 sent to the communication device #2 of 4502_2, and the spectrum 4601 of the first frequency band is used as the spectrum used by the communication device #2 of 4502_2 Fig.46 The spectrum 4602 of the second frequency band is used as the spectrum used by the transmission signal 105-3 sent to the communication device #3 of 4502_3. Fig.46 The spectrum 4601 of the first frequency band is used as the spectrum used by the transmission signal 105-4 sent to the communication device #4 of 4502_4. Fig.46 The spectrum 4603 of the third frequency band can also ensure high data reception quality and can achieve the effect of improving frequency utilization efficiency.

[0759] In addition, the communication device #1 of 4502_1, the communication device #2 of 4502_2, the communication device #3 of 4502_3, and the communication device #4 of 4502_4 have, for example, Figure 4 The composition receives the desired signal and uses Figure 4 The receiving part works to obtain the desired data.

[0760] As described above, when the same data is sent to multiple communication devices, by using

[0761] Use multiple beams and multiple frequency bands

[0762] Use multiple beams and specific frequency bands

[0763] By using either a specific beam or a plurality of frequency bands, it is possible to obtain both high data reception quality and high frequency utilization efficiency.

[0764] Next, the communication device #A of 4501 has, for example, Figure 3The structure of the communication device #1 of 4502_1, the communication device #2 of 4502_2, the communication device #3 of 4502_3, and the communication device #4 of 4502_4, for example, has Figure 4 The composition of is described below.

[0765] The signal processing unit 102 of the communication device #A of 4501 takes the information 101-1 including the first data and the control signal 159 as input, and performs signal processing according to the information contained in the control signal 159, such as "information about the error correction coding method (coding rate, code length (block length))", "information about the modulation method", and "transmission method (multiplexing method)".

[0766] At this time, the signal processing unit 102 generates a signal processed for transmission to the communication device #1 of 4502_1, a signal processed for transmission to the communication device #2 of 4502_2, a signal processed for transmission to the communication device #3 of 4502_3, and a signal processed for transmission to the communication device #4 of 4502_4 from the information 101-1 including the first data. As an example, the signal processed for transmission to the communication device #1 of 4502_1 is 103-1, the signal processed for transmission to the communication device #2 of 4502_2 is 103-2, the signal processed for transmission to the communication device #3 of 4502_3 is 103-3, and the signal processed for transmission to the communication device #4 of 4502_4 is 103-4.

[0767] Then, the wireless unit 104-1 receives as input the signal 103-1 processed by the communication device #1 for transmission to 4502_1, and outputs the transmission signal 105-1. Similarly, the wireless unit 104-2 receives as input the signal 103-2 processed by the communication device #2 for transmission to 4502_2, and outputs the transmission signal 105-2. Then, the wireless unit 104-3 receives as input the signal 103-3 processed by the communication device #3 for transmission to 4502_3, and outputs the transmission signal 105-3. Furthermore, the wireless unit 104-4 receives as input the signal 103-4 processed by the communication device #4 for transmission to 4502_4, and outputs the transmission signal 105-4.

[0768] The weighted synthesis section 301 takes at least the transmission signal 105-1, the transmission signal 105-2, the transmission signal 105-3, and the transmission signal 105-4 as input, performs weighted synthesis operation, and outputs the weighted synthesized signals 302-1, 302-2, ..., 302-K. The weighted synthesized signals 302-1, 302-2, ..., 302-K are respectively outputted from antennas 303-1, 303-2, ..., 303-K as radio waves. Therefore, the transmission signal 105-1 is transmitted using one or more of the antennas 303-1, 303-2, ..., 303-K. Similarly, the transmission signal 105-2 is transmitted using one or more antennas 303-1, 303-2, ..., 303-K, the transmission signal 105-3 is transmitted using one or more antennas 303-1, 303-2, ..., 303-K, and the transmission signal 105-4 is transmitted using one or more antennas 303-1, 303-2, ..., 303-K.

[0769] In addition, antennas 303-1, 303-2, ..., 303-K may be Figure 2 composition.

[0770] Here, using Fig.46 A method of setting the frequencies of the transmission signals 105 - 1 , 105 - 2 , 105 - 3 , and 105 - 4 will be described.

[0771] exist Fig.46 In FIG. 1 , the horizontal axis is set to frequency and the vertical axis is set to power. Transmitted signals 105-1, 105-2, 105-3, and 105-4 are signals having a spectrum of spectrum 4601 in the first frequency band (first channel), a spectrum of spectrum 4602 in the second frequency band (second channel), and a spectrum of spectrum 4603 in the third frequency band (third channel).

[0772] For a specific example, use Fig.47 , Fig.48 , Fig.49 , Fig.50 Provide explanation.

[0773] Fig.47 Shows Fig.45 The positional relationship of the communication device #A of 4501, the communication device #1 of 4502_1, the communication device #2 of 4502_2, the communication device #3 of 4502_3, and the communication device #4 of 4502_4. Fig.47 Recorded in Fig.45 The additional number in the .

[0774] exist Fig.47In the case of 4501, the communication device #A can use the spectrum used as the transmission signal 105-1 sent to the communication device #1 of 4502_1. Fig.46 The spectrum 4601 of the first frequency band can be used as the spectrum used by the transmission signal 105-2 sent to the communication device #2 of 4502_2. Fig.46 The spectrum 4601 of the first frequency band can be used as the spectrum used by the transmission signal 105-3 of the communication device #3 sent to 4502_3. Fig.46 The spectrum 4601 of the first frequency band can be used as the spectrum used by the transmission signal 105-4 of the communication device #4 sent to 4502_4. Fig.46 In this way, the frequency band used by the transmission signal of the communication device #1 transmitted to 4502_1, the frequency band used by the transmission signal of the communication device #2 transmitted to 4502_2, the frequency band used by the transmission signal of the communication device #3 transmitted to 4502_3, and the frequency band used by the transmission signal of the communication device #4 transmitted to 4502_4 can be set to be the same. This can improve the frequency utilization efficiency.

[0775] Here, the temporal existence of "transmission signal 105-1 sent to communication device #1 of 4502_1", "transmission signal 105-2 sent to communication device #2 of 4502_2", "transmission signal 105-3 sent to communication device #3 of 4502_3", and "transmission signal 105-4 sent to communication device #4 of 4502_4" is explained.

[0776] Fig.51 FIG. 4 shows an example of a frame structure of a modulated signal transmitted by communication device A of 4501, and shows an example of the configuration of code elements in the horizontal axis time. Fig.51 , 5101-1 represents a data symbol group for communication device #1 of 4502_1, or a part of a data symbol group for communication device #1 of 4502_1, 5101-2 represents a data symbol group for communication device #2 of 4502_2, or a part of a data symbol group for communication device #2 of 4502_2, 5101-3 represents a data symbol group for communication device #3 of 4502_3, or a part of a data symbol group for communication device #3 of 4502_3, and 5101-4 represents a data symbol group for communication device #4 of 4502_4, or a part of a data symbol group for communication device #4 of 4502_4.

[0777] “The data symbol group for communication device #1 of 4502_1, or a part of the data symbol group for communication device #1 of 4502_1” 5101_1, “the data symbol group for communication device #2 of 4502_2, or a part of the data symbol group for communication device #2 of 4502_2” 5101-2, “the data symbol group for communication device #3 of 4502_3, or a part of the data symbol group for communication device #3 of 4502_3” 5101_3, and “the data symbol group for communication device #4, or a part of the data symbol group for communication device #4 of 4502_4” 5101_4 all exist in time interval 1.

[0778] Fig.48 Shows Fig.45 The communication device #A of 4501, the communication device #1 of 4502_1, the communication device #2 of 4502_2, the communication device #3 of 4502_3, the communication device #4 of 4502_4 and Fig.47 Different positional relationships. Therefore, Fig.48 Recorded in Fig.45 The additional number in the .

[0779] exist Fig.48 In the case of, in the communication device #A of 4501, the spectrum used as the transmission signal 105-1 sent to the communication device #1 of 4502_1 is used. Fig.46 The spectrum 4601 of the first frequency band is used as the spectrum used by the transmission signal 105-2 sent to the communication device #2 of 4502_2, and the spectrum 4601 of the first frequency band is used as the spectrum used by the communication device #2 of 4502_2 Fig.46 The spectrum 4601 of the first frequency band is used as the spectrum used by the transmission signal 105-3 sent to the communication device #3 of 4502_3, and the spectrum 4601 of the first frequency band is used. Fig.46 The spectrum 4601 of the first frequency band is used as the spectrum used by the transmission signal 105-4 sent to the communication device #4 of 4502_4. Fig.46 At this time, the frequency band used by the transmission signal 105-3 sent to the communication device #3 of 4502_3 is different from the frequency band used by the transmission signal 105-4 sent to the communication device #4 of 4502_4 because if the transmission device #A of 4501 makes "the frequency band used by the transmission signal 105-3 sent to the communication device #3 of 4502_3 and the frequency band used by the transmission signal 105-4 sent to the communication device #4 of 4502_4" the same, it will be difficult for the communication devices #3 of 4502_3 and #4 of 4502_4 to separate the transmission beams, thereby increasing interference, which will lead to a decrease in the quality of data reception.

[0780] As described above, it is possible to ensure high data reception quality and to obtain an effect of improving frequency utilization efficiency.

[0781] Here, the temporal existence of "transmission signal 105-1 sent to communication device #1 of 4502_1", "transmission signal 105-2 sent to communication device #2 of 4502_2", "transmission signal 105-3 sent to communication device #3 of 4502_3", and "transmission signal 105-4 sent to communication device #4 of 4502_4" is explained.

[0782] Fig.51 FIG. 4 shows an example of a frame structure of a modulated signal transmitted by communication device A of 4501, and shows an example of the configuration of code elements in the horizontal axis time. Fig.51 , 5101-1 represents a data symbol group for communication device #1 of 4502_1, or a part of a data symbol group for communication device #1 of 4502_1, 5101-2 represents a data symbol group for communication device #2 of 4502_2, or a part of a data symbol group for communication device #2 of 4502_2, 5101-3 represents a data symbol group for communication device #3 of 4502_3, or a part of a data symbol group for communication device #3 of 4502_3, and 5101-4 represents a data symbol group for communication device #4 of 4502_4, or a part of a data symbol group for communication device #4 of 4502_4.

[0783] “The data symbol group for communication device #1 of 4502_1, or a part of the data symbol group for communication device #1 of 4502_1” 5101_1, “the data symbol group for communication device #2 of 4502_2, or a part of the data symbol group for communication device #2 of 4502_2” 5101-2, “the data symbol group for communication device #3 of 4502_3, or a part of the data symbol group for communication device #3 of 4502_3” 5101_3, and “the data symbol group for communication device #4, or a part of the data symbol group for communication device #4 of 4502_4” 5101_4 all exist in time interval 1.

[0784] In addition, Fig.47 The same is true in the case where the communication device #A of 4501 can use the spectrum used as the transmission signal 105-1 sent to the communication device #1 of 4502_1. Fig.46 The spectrum 4601 of the first frequency band can be used as the spectrum used by the transmission signal 105-2 sent to the communication device #2 of 4502_2. Fig.46The spectrum 4601 of the first frequency band can be used as the spectrum used by the transmission signal 105-3 of the communication device #3 sent to 4502_3. Fig.46 The spectrum 4601 of the first frequency band can be used as the spectrum used by the transmission signal 105-4 of the communication device #4 sent to 4502_4. Fig.46 The spectrum 4602 of the second frequency band.

[0785] Fig.49 Shows Fig.45 The communication device #A of 4501, the communication device #1 of 4502_1, the communication device #2 of 4502_2, the communication device #3 of 4502_3, the communication device #4 of 4502_4 and Fig.47 , Fig.48 Therefore, in Fig.49 Recorded in Fig.45 The additional number in the .

[0786] exist Fig.49 In the case of, in the communication device #A of 4501, the spectrum used as the transmission signal 105-1 sent to the communication device #1 of 4502_1 is used. Fig.46 The spectrum 4601 of the first frequency band is used as the spectrum used by the transmission signal 105-2 sent to the communication device #2 of 4502_2, and the spectrum 4601 of the first frequency band is used as the spectrum used by the communication device #2 of 4502_2 Fig.46 The spectrum 4602 of the second frequency band is used as the spectrum used for the transmission signal 105-3 sent to the communication device #3 of 4502_3, and the spectrum 4602 of the second frequency band is used as the spectrum used for the transmission signal 105-3 sent to the communication device #3 of 4502_3. Fig.46 The spectrum 4602 of the second frequency band is used as the spectrum used by the transmission signal 105-4 sent to the communication device #4 of 4502_4. Fig.46 At this time, the frequency band used by the transmission signal 105-1 sent to the communication device #1 of 4502_1, the frequency band used by the transmission signal 105-3 sent to the communication device #3 of 4502_3, and the frequency band used by the transmission signal 105-4 sent to the communication device #4 of 4502_4 are different because if the transmission device #A of 4501 makes "the frequency band used by the transmission signal 105-1 sent to the communication device #1 of 4502_1, the frequency band used by the transmission signal 105-3 sent to the communication device #3 of 4502_3, and the frequency band used by the transmission signal 105-4 sent to the communication device #4 of 4502_4" the same, it will be difficult for the communication device #1 of 4502_1, the communication device #3 of 4502_3, and the communication device #4 of 4502_4 to separate the transmission beams, so that interference increases, which will lead to a decrease in the reception quality of data.

[0787] As described above, it is possible to ensure high data reception quality and to obtain an effect of improving frequency utilization efficiency.

[0788] Here, the temporal existence of "transmission signal 105-1 sent to communication device #1 of 4502_1", "transmission signal 105-2 sent to communication device #2 of 4502_2", "transmission signal 105-3 sent to communication device #3 of 4502_3", and "transmission signal 105-4 sent to communication device #4 of 4502_4" is explained.

[0789] Fig.51 FIG. 4 shows an example of a frame structure of a modulated signal transmitted by communication device A of 4501, and shows an example of the configuration of code elements in the horizontal axis time. Fig.51 , 5101-1 represents a data symbol group for communication device #1 of 4502_1, or a part of a data symbol group for communication device #1 of 4502_1, 5101-2 represents a data symbol group for communication device #2 of 4502_2, or a part of a data symbol group for communication device #2 of 4502_2, 5101-3 represents a data symbol group for communication device #3 of 4502_3, or a part of a data symbol group for communication device #3 of 4502_3, and 5101-4 represents a data symbol group for communication device #4 of 4502_4, or a part of a data symbol group for communication device #4 of 4502_4.

[0790] “The data symbol group for communication device #1 of 4502_1, or a part of the data symbol group for communication device #1 of 4502_1” 5101_1, “the data symbol group for communication device #2 of 4502_2, or a part of the data symbol group for communication device #2 of 4502_2” 5101-2, “the data symbol group for communication device #3 of 4502_3, or a part of the data symbol group for communication device #3 of 4502_3” 5101_3, and “the data symbol group for communication device #4, or a part of the data symbol group for communication device #4 of 4502_4” 5101_4 all exist in time interval 1.

[0791] In addition, Fig.47 In the case of the same, in the communication device #A of 4501, the spectrum used as the transmission signal 105-1 sent to the communication device #1 of 4502_1 can be used Fig.46 The spectrum 4601 of the first frequency band can be used as the spectrum used by the transmission signal 105-2 sent to the communication device #2 of 4502_2. Fig.46The spectrum 4602 of the second frequency band can be used as the spectrum used by the transmission signal 105-3 of the communication device #3 sent to 4502_3. Fig.46 The spectrum 4602 of the second frequency band can be used as the spectrum used by the transmission signal 105-4 of the communication device #4 sent to 4502_4. Fig.46 The spectrum of the 3rd band is 4603.

[0792] Fig.50 Shows Fig.45 The communication device #A of 4501, the communication device #1 of 4502_1, the communication device #2 of 4502_2, the communication device #3 of 4502_3, the communication device #4 of 4502_4 and Fig.47 , Fig.48 , Fig.49 Different positional relationships. Fig.50 Recorded in Fig.45 The additional number in the .

[0793] exist Fig.50 In the case of 4501, the communication device #A uses the spectrum used as the transmission signal 105-1 sent to the communication device #1 of 4502_1. Fig.46 The spectrum 4601 of the first frequency band is used as the spectrum used by the transmission signal 105-2 sent to the communication device #2 of 4502_2, and the spectrum 4601 of the first frequency band is used as the spectrum used by the communication device #2 of 4502_2 Fig.46 The spectrum 4602 of the second frequency band is used as the spectrum used by the transmission signal 105-3 sent to the communication device #3 of 4502_3. Fig.46 The spectrum 4602 of the second frequency band is used as the spectrum used by the transmission signal 105-4 sent to the communication device #4 of 4502_4. Fig.46 The spectrum 4601 of the 1st frequency band.

[0794] At this time, the frequency band used by the transmission signal 105-1 sent to the communication device #1 of 4502_1 is different from the frequency band used by the transmission signal 105-2 sent to the communication device #2 of 4502_2. This is because if the transmission device #A of 4501 makes "the frequency band used by the transmission signal 105-1 sent to the communication device #1 of 4502_1 and the frequency band used by the transmission signal 105-2 sent to the communication device #2 of 4502_2" the same, it will be difficult for the communication devices #1 of 4502_1 and #2 of 4502_2 to separate the transmission beams, thereby increasing interference, which will lead to a decrease in the data reception quality.

[0795] Similarly, the frequency band used by the transmission signal 105-3 sent to the communication device #3 of 4502_3 is different from the frequency band used by the transmission signal 105-4 sent to the communication device #4 of 4502_4. This is because if the transmission device #A of 4501 makes "the frequency band used by the transmission signal 105-3 sent to the communication device #3 of 4502_3 and the frequency band used by the transmission signal 105-4 sent to the communication device #4 of 4502_4" the same, it will be difficult for the communication device #3 of 4502_3 and the communication device #4 of 4502_4 to separate the transmission beams, thereby increasing interference, which will lead to a decrease in the data reception quality.

[0796] As described above, it is possible to ensure high data reception quality and to obtain an effect of improving frequency utilization efficiency.

[0797] Here, the temporal existence of "transmission signal 105-1 sent to communication device #1 of 4502_1", "transmission signal 105-2 sent to communication device #2 of 4502_2", "transmission signal 105-3 sent to communication device #3 of 4502_3", and "transmission signal 105-4 sent to communication device #4 of 4502_4" is explained.

[0798] Fig.51 FIG. 4 shows an example of a frame structure of a modulated signal transmitted by communication device A of 4501, and shows an example of the configuration of code elements in the horizontal axis time. Fig.51 , 5101-1 represents a data symbol group for communication device #1 of 4502_1, or a part of a data symbol group for communication device #1 of 4502_1, 5101-2 represents a data symbol group for communication device #2 of 4502_2, or a part of a data symbol group for communication device #2 of 4502_2, 5101-3 represents a data symbol group for communication device #3 of 4502_3, or a part of a data symbol group for communication device #3 of 4502_3, and 5101-4 represents a data symbol group for communication device #4 of 4502_4, or a part of a data symbol group for communication device #4 of 4502_4.

[0799] “The data symbol group for communication device #1 of 4502_1, or a part of the data symbol group for communication device #1 of 4502_1” 5101_1, “the data symbol group for communication device #2 of 4502_2, or a part of the data symbol group for communication device #2 of 4502_2” 5101-2, “the data symbol group for communication device #3 of 4502_3, or a part of the data symbol group for communication device #3 of 4502_3” 5101_3, and “the data symbol group for communication device #4, or a part of the data symbol group for communication device #4 of 4502_4” 5101_4 all exist in time interval 1.

[0800] In addition, Fig.47 In the case of the same, in the communication device #A of 4501, the spectrum used as the transmission signal 105-1 sent to the communication device #1 of 4502_1 can be used Fig.46 The spectrum 4601 of the first frequency band can be used as the spectrum used by the transmission signal 105-2 sent to the communication device #2 of 4502_2. Fig.46 The spectrum 4602 of the second frequency band can be used as the spectrum used by the transmission signal 105-3 of the communication device #3 sent to 4502_3. Fig.46 The spectrum 4602 of the second frequency band can be used as the spectrum used by the transmission signal 105-4 of the communication device #4 sent to 4502_4. Fig.46 The spectrum 4601 of the 1st frequency band.

[0801] And, in Fig.50 In the case of 4501, even if the communication device #A of 4501 uses the spectrum used for the transmission signal 105-1 sent to the communication device #1 of 4502_1, Fig.46 The spectrum 4601 of the first frequency band is used as the spectrum used by the transmission signal 105-2 sent to the communication device #2 of 4502_2, and the spectrum 4601 of the first frequency band is used as the spectrum used by the communication device #2 of 4502_2 Fig.46 The spectrum 4602 of the second frequency band is used as the spectrum used by the transmission signal 105-3 sent to the communication device #3 of 4502_3. Fig.46 The spectrum 4602 of the second frequency band is used as the spectrum used by the transmission signal 105-4 sent to the communication device #4 of 4502_4. Fig.46 The spectrum 4603 of the third frequency band can also ensure high data reception quality and can achieve the effect of improving frequency utilization efficiency.

[0802] Moreover, in Fig.50 In the case of 4501, even if the communication device #A of 4501 uses the spectrum used for the transmission signal 105-1 sent to the communication device #1 of 4502_1, Fig.46 The spectrum 4601 of the first frequency band is used as the spectrum used by the transmission signal 105-2 sent to the communication device #2 of 4502_2, and the spectrum 4601 of the first frequency band is used as the spectrum used by the communication device #2 of 4502_2 Fig.46 The spectrum 4602 of the second frequency band is used as the spectrum used by the transmission signal 105-3 sent to the communication device #3 of 4502_3. Fig.46 The spectrum 4601 of the first frequency band is used as the spectrum used by the transmission signal 105-4 sent to the communication device #4 of 4502_4. Fig.46 The spectrum 4603 of the third frequency band can also ensure high data reception quality and can achieve the effect of improving frequency utilization efficiency.

[0803] In addition, the communication device #1 of 4502_1, the communication device #2 of 4502_2, the communication device #3 of 4502_3, and the communication device #4 of 4502_4 have, for example, Figure 4 The composition receives the desired signal and makes Figure 4 The receiving part works, thereby obtaining the desired data.

[0804] Next, the communication device #A of 4501 has, for example, Fig.44 The communication device #1 of 4502_1, the communication device #2 of 4502_2, the communication device #3 of 4502_3, and the communication device #4 of 4502_4 are provided with Figure 4 The composition of is described below.

[0805] The signal processing unit 102 of the communication device #A of 4501 takes the information 101-1 including the first data and the control signal 159 as input, and performs signal processing according to the information contained in the control signal 159, such as "information about the error correction coding method (coding rate, code length (block length))", "information about the modulation method", and "transmission method (multiplexing method)".

[0806] At this time, the signal processing unit 102 generates a signal processed for transmission to the communication device #1 of 4502_1, a signal processed for transmission to the communication device #2 of 4502_2, a signal processed for transmission to the communication device #3 of 4502_3, and a signal processed for transmission to the communication device #4 of 4502_4 from the information 101-1 including the first data. As an example, the signal processed for transmission to the communication device #1 of 4502_1 is 103-1, the signal processed for transmission to the communication device #2 of 4502_2 is 103-2, the signal processed for transmission to the communication device #3 of 4502_3 is 103-3, and the signal processed for transmission to the communication device #4 of 4502_4 is 103-4.

[0807] The weighted synthesis unit 301 receives at least the processed signal 103-1, the processed signal 103-2, the processed signal 103-3, and the processed signal 103-4 as input, performs weighted synthesis operation, and outputs weighted synthesized signals 4402-1, 4402-2, ..., 4402-K. Therefore, the processed signal 103-1 is transmitted using one or more antennas of the antennas 303-1, 303-2, ..., 303-K. Similarly, the processed signal 103-2 is transmitted using one or more antennas of the antennas 303-1, 303-2, ..., 303-K, the processed signal 103-3 is transmitted using one or more antennas of the antennas 303-1, 303-2, ..., 303-K, and the processed signal 103-4 is transmitted using one or more antennas of the antennas 303-1, 303-2, ..., 303-K.

[0808] In addition, antennas 303-1, 303-2, ..., 303-K may be Figure 2 composition.

[0809] At this time, using Fig.46 A method of setting the frequencies of the signals 103 - 1 , 103 - 2 , 103 - 3 , and 103 - 4 after signal processing will be described.

[0810] exist Fig.46 , the horizontal axis is set to frequency and the vertical axis is set to power. After the signal processing, the signals 103-1, 103-2, 103-3, and 103-4 become, after frequency conversion, any one of a signal having a spectrum of spectrum 4601 in the first frequency band (first channel), a signal having a spectrum of spectrum 4602 in the second frequency band (second channel), and a signal having a spectrum of spectrum 4603 in the third frequency band (third channel).

[0811] In addition, for example, through Figure 1 , Figure 3 In the case where a transmitting device is used to generate a modulation signal of the first frequency band 4601, a modulation signal of the second frequency band 4602, and a modulation signal of the third frequency band 4603, Figure 1 The antenna part, Figure 3 , Fig.44 The weighted synthesis unit can be set in such a way that the directivity of the modulation signal of the first frequency band 4601 is different from the directivity of the modulation signal of the second frequency band 4602. Figure 1 The antenna part, Figure 3 , Fig.44 The weighted synthesis unit may be set in such a way that the directivity of the modulation signal of the first frequency band 4601 is different from the directivity of the modulation signal of the third frequency band 4603. Figure 1 The antenna part, Figure 3 , Fig.44 The weighted synthesis unit may be set in such a way that the directivity of the modulation signal of the second frequency band 4602 is different from the directivity of the modulation signal of the third frequency band 4603.

[0812] For a specific example, use Fig.47 , Fig.48 , Fig.49 , Fig.50 Provide explanation.

[0813] Fig.47 Shows Fig.45 The positional relationship of the communication device #A of 4501, the communication device #1 of 4502_1, the communication device #2 of 4502_2, the communication device #3 of 4502_3, and the communication device #4 of 4502_4. Fig.47 Recorded in Fig.45 The additional number in the .

[0814] exist Fig.47 In the case of, in the communication device #A of 4501, the spectrum used after the frequency conversion of the signal 103-1 processed as the signal sent to the communication device #1 of 4502_1 can be used Fig.46 The spectrum 4601 of the first frequency band can be used as the spectrum used by the signal 103-2 after the signal processing sent to the communication device #2 of 4502_2 after frequency conversion. Fig.46 The spectrum 4601 of the first frequency band can be used as the spectrum used by the signal 103-3 after the signal processing sent to the communication device #3 of 4502_3 after frequency conversion. Fig.46The spectrum 4601 of the first frequency band can be used as the spectrum used by the signal 103-4 after the signal processing sent to the communication device #4 of 4502_4 after frequency conversion. Fig.46 In this way, the frequency band used by the transmission signal of the communication device #1 transmitted to 4502_1, the frequency band used by the transmission signal of the communication device #2 transmitted to 4502_2, the frequency band used by the transmission signal of the communication device #3 transmitted to 4502_3, and the frequency band used by the transmission signal of the communication device #4 transmitted to 4502_4 can be set to be the same. This can improve the frequency utilization efficiency.

[0815] Here, the temporal existence of “the signal 103-1 after signal processing sent to communication device #1 of 4502_1”, “the signal 103-2 after signal processing sent to communication device #2 of 4502_2”, “the signal 103-3 after signal processing sent to communication device #3 of 4502_3”, and “the signal 103-4 after signal processing sent to communication device #4 of 4502_4” is explained.

[0816] Fig.51 FIG. 4 shows an example of a frame structure of a modulated signal transmitted by communication device A of 4501, and shows an example of the configuration of code elements in the horizontal axis time. Fig.51 , 5101-1 represents a data symbol group for communication device #1 of 4502_1, or a part of a data symbol group for communication device #1 of 4502_1, 5101-2 represents a data symbol group for communication device #2 of 4502_2, or a part of a data symbol group for communication device #2 of 4502_2, 5101-3 represents a data symbol group for communication device #3 of 4502_3, or a part of a data symbol group for communication device #3 of 4502_3, and 5101-4 represents a data symbol group for communication device #4 of 4502_4, or a part of a data symbol group for communication device #4 of 4502_4.

[0817] “The data symbol group for communication device #1 of 4502_1, or a part of the data symbol group for communication device #1 of 4502_1” 5101_1, “the data symbol group for communication device #2 of 4502_2, or a part of the data symbol group for communication device #2 of 4502_2” 5101-2, “the data symbol group for communication device #3 of 4502_3, or a part of the data symbol group for communication device #3 of 4502_3” 5101_3, and “the data symbol group for communication device #4, or a part of the data symbol group for communication device #4 of 4502_4” 5101_4 all exist in time interval 1.

[0818] Fig.48 Shows Fig.45 The communication device #A of 4501, the communication device #1 of 4502_1, the communication device #2 of 4502_2, the communication device #3 of 4502_3, the communication device #4 of 4502_4 and Fig.47 Different positional relationships. Fig.48 Recorded in Fig.45 The additional number in the .

[0819] exist Fig.48 In the case of communication device #A of 4501, the spectrum used after the signal 103-1 processed as the signal sent to communication device #1 of 4502_1 is used after the frequency conversion. Fig.46 The spectrum 4601 of the first frequency band is used as the spectrum used by the signal 103-2 after the signal processing sent to the communication device #2 of 4502_2 after frequency conversion, and is used Fig.46 The spectrum 4601 of the first frequency band is used as the spectrum used by the signal 103-3 after the signal processing sent to the communication device #3 of 4502_3 after frequency conversion, using Fig.46 The spectrum 4601 of the first frequency band is used as the spectrum used by the signal 103-4 after the signal processing sent to the communication device #4 of 4502_4 after frequency conversion, and is used Fig.46 The spectrum 4602 of the second frequency band. At this time, the frequency band used by the signal 103-3 after the signal processing sent to the communication device #3 of 4502_3 and the frequency band used by the signal 103-4 after the signal processing sent to the communication device #4 of 4502_4 are different from each other because if the transmitting device #A of 4501 makes "the frequency band used by the signal 103-3 after the signal processing sent to the communication device #3 of 4502_3 and the frequency band used by the signal 103-4 after the signal processing sent to the communication device #4 of 4502_4 after the frequency conversion" the same, it will be difficult for the communication devices #3 of 4502_3 and #4 of 4502_4 to separate the transmission beams, thereby increasing interference, which will lead to a decrease in the quality of data reception.

[0820] As described above, it is possible to ensure high data reception quality and to obtain an effect of improving frequency utilization efficiency.

[0821] Here, the temporal existence of “the signal 103-1 after signal processing sent to communication device #1 of 4502_1”, “the signal 103-2 after signal processing sent to communication device #2 of 4502_2”, “the signal 103-3 after signal processing sent to communication device #3 of 4502_3”, and “the signal 103-4 after signal processing sent to communication device #4 of 4502_4” is explained.

[0822] Fig.51 FIG. 4 shows an example of a frame structure of a modulated signal transmitted by communication device A of 4501, and shows an example of the configuration of code elements in the horizontal axis time. Fig.51 , 5101-1 represents a data symbol group for communication device #1 of 4502_1, or a part of a data symbol group for communication device #1 of 4502_1, 5101-2 represents a data symbol group for communication device #2 of 4502_2, or a part of a data symbol group for communication device #2 of 4502_2, 5101-3 represents a data symbol group for communication device #3 of 4502_3, or a part of a data symbol group for communication device #3 of 4502_3, and 5101-4 represents a data symbol group for communication device #4 of 4502_4, or a part of a data symbol group for communication device #4 of 4502_4.

[0823] “The data symbol group for communication device #1 of 4502_1, or a part of the data symbol group for communication device #1 of 4502_1” 5101_1, “the data symbol group for communication device #2 of 4502_2, or a part of the data symbol group for communication device #2 of 4502_2” 5101-2, “the data symbol group for communication device #3 of 4502_3, or a part of the data symbol group for communication device #3 of 4502_3” 5101_3, and “the data symbol group for communication device #4, or a part of the data symbol group for communication device #4 of 4502_4” 5101_4 all exist in time interval 1.

[0824] In addition, Fig.47 In the case of the same, in the communication device #A of 4501, the spectrum used after the frequency conversion of the signal 103-1 processed as the signal sent to the communication device #1 of 4502_1 can be used Fig.46 The spectrum 4601 of the first frequency band can be used as the spectrum used by the signal 103-2 after the signal processing sent to the communication device #2 of 4502_2 after frequency conversion. Fig.46 The spectrum 4601 of the first frequency band can be used as the spectrum used by the signal 103-3 after the signal processing sent to the communication device #3 of 4502_3 after frequency conversion. Fig.46The spectrum 4601 of the first frequency band can be used as the spectrum used by the signal 103-4 after the signal processing sent to the communication device #4 of 4502_4 after frequency conversion. Fig.46 The spectrum 4602 of the second frequency band.

[0825] Fig.49 Shows Fig.45 The communication device #A of 4501, the communication device #1 of 4502_1, the communication device #2 of 4502_2, the communication device #3 of 4502_3, the communication device #4 of 4502_4 and Fig.47 , Fig.48 Therefore, in Fig.49 Recorded in Fig.45 The additional number in the .

[0826] exist Fig.49 In the case of communication device #A of 4501, the spectrum used after the signal 103-1 processed as the signal sent to communication device #1 of 4502_1 is used after the frequency conversion. Fig.46 The spectrum 4601 of the first frequency band is used as the spectrum used by the signal 103-2 after the signal processing sent to the communication device #2 of 4502_2 after frequency conversion, and is used Fig.46 The spectrum 4602 of the second frequency band is used as the spectrum used by the signal 103-3 after the signal processing sent to the communication device #3 of 4502_3 after frequency conversion. Fig.46 The spectrum 4602 of the second frequency band is used as the spectrum used by the signal 103-4 after the signal processing sent to the communication device #4 of 4502_4 after frequency conversion. Fig.46 The spectrum of the 3rd band is 4603. At this time, the frequency band used by the processed signal 103-1 sent to the communication device #1 of 4502_1, the frequency band used by the processed signal 105-3 sent to the communication device #3 of 4502_3 after frequency conversion, and the frequency band used by the processed signal 103-4 sent to the communication device #4 of 4502_4 after frequency conversion are different because if the transmitting device #A of 4501 makes "the frequency band used by the processed signal 103-1 sent to the communication device #1 of 4502_1 after frequency conversion, the frequency band used by the processed signal 103-3 sent to the communication device #3 of 4502_3 after frequency conversion, and the frequency band used by the processed signal 103-4 sent to the communication device #4 of 4502_4 after frequency conversion" the same, it will be difficult for the communication device #1 of 4502_1, the communication device #3 of 4502_3, and the communication device #4 of 4502_4 to separate the transmission beams, thereby increasing interference, which will lead to a decrease in the data reception quality.

[0827] As described above, it is possible to ensure high data reception quality and to obtain an effect of improving frequency utilization efficiency.

[0828] Here, the temporal existence of “the signal 103-1 after signal processing sent to communication device #1 of 4502_1”, “the signal 103-2 after signal processing sent to communication device #2 of 4502_2”, “the signal 103-3 after signal processing sent to communication device #3 of 4502_3”, and “the signal 103-4 after signal processing sent to communication device #4 of 4502_4” is explained.

[0829] Fig.51 FIG. 4 shows an example of a frame structure of a modulated signal transmitted by communication device A of 4501, and shows an example of the configuration of code elements in the horizontal axis time. Fig.51 , 5101-1 represents a data symbol group for communication device #1 of 4502_1, or a part of a data symbol group for communication device #1 of 4502_1, 5101-2 represents a data symbol group for communication device #2 of 4502_2, or a part of a data symbol group for communication device #2 of 4502_2, 5101-3 represents a data symbol group for communication device #3 of 4502_3, or a part of a data symbol group for communication device #3 of 4502_3, and 5101-4 represents a data symbol group for communication device #4 of 4502_4, or a part of a data symbol group for communication device #4 of 4502_4.

[0830] “The data symbol group for communication device #1 of 4502_1, or a part of the data symbol group for communication device #1 of 4502_1” 5101_1, “the data symbol group for communication device #2 of 4502_2, or a part of the data symbol group for communication device #2 of 4502_2” 5101-2, “the data symbol group for communication device #3 of 4502_3, or a part of the data symbol group for communication device #3 of 4502_3” 5101_3, and “the data symbol group for communication device #4, or a part of the data symbol group for communication device #4 of 4502_4” 5101_4 all exist in time interval 1.

[0831] In addition, Fig.47 In the case of the same, in the communication device #A of 4501, the spectrum used after the frequency conversion of the signal 103-1 processed as the signal sent to the communication device #1 of 4502_1 can be used Fig.46 The spectrum 4601 of the first frequency band can be used as the spectrum used by the signal 103-2 after the signal processing sent to the communication device #2 of 4502_2 after frequency conversion. Fig.46The spectrum 4602 of the second frequency band can be used as the spectrum used by the signal 103-3 after the signal processing sent to the communication device #3 of 4502_3 after frequency conversion. Fig.46 The spectrum 4602 of the second frequency band can be used as the spectrum used by the signal 103-4 after the signal processing sent to the communication device #4 of 4502_4 after frequency conversion. Fig.46 The spectrum of the 3rd band is 4603.

[0832] Fig.50 Shows Fig.45 The communication device #A of 4501, the communication device #1 of 4502_1, the communication device #2 of 4502_2, the communication device #3 of 4502_3, the communication device #4 of 4502_4 and Fig.47 , Fig.48 , Fig.49 Therefore, in Fig.50 Recorded in Fig.45 The additional number in the .

[0833] exist Fig.50 In the case of communication device #A of 4501, the spectrum used after the signal 103-1 processed as the signal sent to communication device #1 of 4502_1 is used after the frequency conversion. Fig.46 The spectrum 4601 of the first frequency band is used as the spectrum used by the signal 103-2 after the signal processing sent to the communication device #2 of 4502_2 after frequency conversion, and is used Fig.46 The spectrum 4602 of the second frequency band is used as the spectrum used by the signal 103-3 after the signal processing sent to the communication device #3 of 4502_3 after frequency conversion. Fig.46 The spectrum 4602 of the second frequency band is used as the spectrum used by the signal 103-4 after the signal processing sent to the communication device #4 of 4502_4 after frequency conversion. Fig.46 The spectrum 4601 of the 1st frequency band.

[0834] At this time, the frequency band used by the processed signal 103-1 sent to the communication device #1 of 4502_1 after frequency conversion is different from the frequency band used by the processed signal 103-2 sent to the communication device #2 of 4502_2 after frequency conversion. This is because if the transmitting device #A of 4501 makes "the frequency band used by the processed signal 103-1 sent to the communication device #1 of 4502_1 after frequency conversion and the frequency band used by the processed signal 103-2 sent to the communication device #2 of 4502_2 after frequency conversion" the same, it will be difficult for the communication devices #1 of 4502_1 and #2 of 4502_2 to separate the transmission beams, thereby increasing interference, which will lead to a decrease in the data reception quality.

[0835] Similarly, the frequency band used by the processed signal 103-3 sent to the communication device #3 of 4502_3 after frequency conversion is different from the frequency band used by the processed signal 103-4 sent to the communication device #4 of 4502_4 after frequency conversion. This is because if the transmitting device #A of 4501 makes "the frequency band used by the processed signal 103-3 sent to the communication device #3 of 4502_3 after frequency conversion and the frequency band used by the processed signal 103-4 sent to the communication device #4 of 4502_4 after frequency conversion" the same, it will be difficult for the communication devices #3 of 4502_3 and #4 of 4502_4 to separate the transmission beams, thereby increasing interference, which will lead to a decrease in the data reception quality.

[0836] As described above, it is possible to ensure high data reception quality and to obtain an effect of improving frequency utilization efficiency.

[0837] Here, the temporal existence of “the signal 103-1 after signal processing sent to communication device #1 of 4502_1”, “the signal 103-2 after signal processing sent to communication device #2 of 4502_2”, “the signal 103-3 after signal processing sent to communication device #3 of 4502_3”, and “the signal 103-4 after signal processing sent to communication device #4 of 4502_4” is explained.

[0838] Fig.51 FIG. 4 shows an example of a frame structure of a modulated signal transmitted by communication device A of 4501, and shows an example of the configuration of code elements in the horizontal axis time. Fig.51, 5101-1 represents a data symbol group for communication device #1 of 4502_1, or a part of a data symbol group for communication device #1 of 4502_1, 5101-2 represents a data symbol group for communication device #2 of 4502_2, or a part of a data symbol group for communication device #2 of 4502_2, 5101-3 represents a data symbol group for communication device #3 of 4502_3, or a part of a data symbol group for communication device #3 of 4502_3, and 5101-4 represents a data symbol group for communication device #4 of 4502_4, or a part of a data symbol group for communication device #4 of 4502_4.

[0839] “The data symbol group for communication device #1 of 4502_1, or a part of the data symbol group for communication device #1 of 4502_1” 5101_1, “the data symbol group for communication device #2 of 4502_2, or a part of the data symbol group for communication device #2 of 4502_2” 5101-2, “the data symbol group for communication device #3 of 4502_3, or a part of the data symbol group for communication device #3 of 4502_3” 5101_3, and “the data symbol group for communication device #4, or a part of the data symbol group for communication device #4 of 4502_4” 5101_4 all exist in time interval 1.

[0840] In addition, Fig.47 In the case of the same, in the communication device #A of 4501, the spectrum used after the frequency conversion of the signal 103-1 processed as the signal sent to the communication device #1 of 4502_1 can be used Fig.46 The spectrum 4601 of the first frequency band can be used as the spectrum used by the signal 103-2 after the signal processing sent to the communication device #2 of 4502_2 after frequency conversion. Fig.46 The spectrum 4602 of the second frequency band can be used as the spectrum used by the signal 1...

Claims

1. A communication device comprising: The first access point communicates with one or more terminals according to the first communication method when in operation; The second access point communicates with the server according to the second communication method when in action; storage device; and processor, When the processor is in action, In the first mode, receiving first transmission data via the first access point, storing the first transmission data in the storage device, sending the first transmission data stored in the storage device to the server via the second access point, In the second mode, receiving second transmission data via the first access point, The second transmission data is not stored in the storage device, but is sent to the server via the second access point.

2. The communication device according to claim 1, A control signal is transmitted before receiving the first transmission data, the control signal notifying the communication device that the storage device is provided for the first mode.

3. The communication device according to claim 1, receiving a confirmation response from the server, the confirmation response being a confirmation response indicating receipt of the first transmission data, The first transmission data is deleted according to the confirmation response.

4. The communication device according to claim 1, It also includes a power supply device for supplying power to the one or more terminals.

5. A communication method, performed by a communication device including a first communication unit, a second communication unit, and a storage device, wherein: communicating with one or more terminals according to a first communication method, Communicate with the server according to the second communication method, In the first mode, receiving first transmission data via the first communication unit, storing the first transmission data in the storage device, sending the first transmission data stored in the storage device to the server via the second communication unit, In the second mode, receiving second transmission data via the first communication unit, The second transmission data is not stored in the storage device but is transmitted to the server via the second communication unit.

6. The communication method according to claim 5, Furthermore, before receiving the first transmission data, a control signal is transmitted, the control signal notifying the communication device that the storage device is provided for the first mode.

7. The communication method according to claim 5, further, receiving a confirmation response from the server, the confirmation response being a confirmation response indicating receipt of the first transmission data, The first transmission data is deleted according to the confirmation response.

8. The communication method according to claim 5, The communication device further comprises a power supply device, In the communication method, power is further supplied to one of the one or more terminals.

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