Transmission system and user terminal

Abstract

The invention relates to a transmission system and a user terminal. This transmission system is a transmission system for multiple transmission and reception points (TRPs), and is provided with a first transmission device, a second transmission device, and a processor configured so as to control the first transmission device and the second transmission device to transmit information to a user terminal, the information indicating whether or not simultaneous communication is supported; controlling the first transmission device to execute a first transmission of a first PDSCH (Physical Downlink Shared Channel) in a first frequency channel; and controlling the second transmission device to perform a second transmission of a second PDSCH in a second frequency channel different from the first frequency channel, in which the processor controls the first transmission to partially overlap with the second transmission in a time domain when the information indicates that the simultaneous communication is supported, and controls the second transmission to partially overlap with the second transmission in a time domain when the information indicates that the simultaneous communication is not supported. The processor controls the first transmission not to overlap with the second transmission in the time domain.

Description

[0001] This application is a divisional case of the invention patent application with the application date of September 26, 2019, application number 201980041847.5, and invention name “Communication system, terminal, and control method”. Technical Field

[0002] The present disclosure relates to a communication system, a terminal, and a control 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, the transmission data of one or more streams is modulated, and the generated one or more modulated signals are simultaneously transmitted using multiple antennas at the same frequency (common frequency). Multi-antenna communication is used to promote the improvement of data reception quality and / or the improvement of data communication speed (per unit time). For example, Patent Document 1 discloses a communication system in which a transmitting device transmits a modulated signal using multiple antennas having a pseudo-omnidirectional pattern with a substantially constant antenna gain in a wide direction throughout space.

[0004] In addition, in a communication system, it is desired not only to improve the reception quality or communication speed between specific communication devices, but also to be able to cope with performance improvements or new service forms of part or all of the system, such as in a communication system utilizing multicast / broadcast communication or relay communication.

[0005] (Prior art literature)

[0006] (Patent Document)

[0007] Patent Document 1 International Publication No. 2011 / 055536 Summary of the Invention

[0008] Provided are a communication system, a communication device, a communication method, and a control method that can promote performance improvement of a portion or the entire system and / or facilitate handling of new service forms in a network including relay communication.

[0009] One form of a transmitting system disclosed herein is a transmitting system for multiple transmitting and receiving points (TRPs), comprising a first transmitting device, a second transmitting device, and a processor, wherein the processor is configured to: control the first transmitting device and the second transmitting device to send information to a user terminal, the information indicating whether simultaneous communication is supported; control the first transmitting device to perform a first transmission of a first PDSCH (physical downlink shared channel) in a first frequency channel; and control the second transmitting device to perform a second transmission of a second PDSCH in a second frequency channel different from the first frequency channel, wherein, when the information indicates that the simultaneous communication is supported, the processor controls the first transmission to partially overlap with the second transmission in the time domain, and when the information indicates that the simultaneous communication is not supported, the processor controls the first transmission to not overlap with the second transmission in the time domain.

[0010] In addition, these general or specific methods can be implemented through systems, methods, integrated circuits, computer programs, or computer-readable recording media such as CD-ROMs, or through any combination of systems, methods, integrated circuits, computer programs, and recording media.

[0011] The present disclosure can facilitate performance improvement of a portion or the entire system in a network including relay communication, and / or facilitate handling of 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 This 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 This 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 used to illustrate the relationship between multiple flows.

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

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

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

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

[0024] Figure 13 It is a diagram showing the relationship between multiple modulation signals.

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

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

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

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

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

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

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

[0032] Figure 21 It is a diagram showing the relationship between multiple modulation signals.

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

[0034] Figure 23 This is a diagram showing the communication procedure between a base station and a terminal.

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

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

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

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

[0039] Figure 28 This is a diagram showing the communication procedure between a base station and a terminal.

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

[0041] Figure 30 This is a diagram showing the communication procedure between a base station and a terminal.

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

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

[0044] Figure 33 This is a diagram showing the communication procedure between a base station and a terminal.

[0045] Figure 34 This is a diagram showing the communication procedure between a base station and a terminal.

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

[0047] Figure 36 This is a diagram showing the communication procedure between a base station and a terminal.

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

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

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

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

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

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

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

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

[0056] Figure 45 An example of a connection between a network and a gateway is shown.

[0057] Figure 46 An example of the configuration of a communication system is shown.

[0058] Figure 47 An example of the configuration of an indoor network is shown.

[0059] Figure 48 An example of a frame structure is shown.

[0060] Figure 49 An example of a communication sequence is shown.

[0061] Figure 50 An example of a frame structure is shown.

[0062] Figure 51 An example of the configuration of an indoor network is shown.

[0063] Figure 52 An example of a frame structure is shown.

[0064] Figure 53 An example of the configuration of an indoor network is shown.

[0065] Figure 54 An example of operation timing is shown.

[0066] Figure 55 An example of the configuration of an indoor network is shown.

[0067] Figure 56 An example of the configuration of an indoor network is shown.

[0068] Figure 57 An example of the configuration of an indoor network is shown.

[0069] Figure 58 An example of a communication sequence is shown.

[0070] Figure 59 An example of the configuration of an indoor gateway is shown.

[0071] Figure 60 An example of frame transmission and reception is shown.

[0072] Figure 61 An example of a frame structure is shown.

[0073] Figure 62An example of the configuration of an indoor gateway is shown.

[0074] Figure 63 An example of frame transmission timing is shown.

[0075] Figure 64 An example of frame transmission timing is shown.

[0076] Figure 65 An example of frame transmission timing is shown.

[0077] Figure 66 An example of the system configuration is shown.

[0078] Figure 67 An example of the system configuration is shown.

[0079] Figure 68 An example of the configuration of the device is shown.

[0080] Figure 69 An example of the configuration of a terminal is shown.

[0081] Figure 70 An example of how the system works is shown.

[0082] Figure 71 An example of how the system works is shown.

[0083] Figure 72 An example of how the system works is shown.

[0084] Figure 73 An example of how the system works is shown.

[0085] Figure 74 An example of sending and receiving information is shown.

[0086] Figure 75 An example of sending and receiving information is shown.

[0087] Figure 76 An example of sending and receiving information is shown.

[0088] Figure 77 An example of the configuration of a gateway is shown.

[0089] Figure 78 An example of the operation of the terminal, server, and device is shown.

[0090] Figure 79 An example of the configuration of the server is shown.

[0091] Figure 80 An example of a network configuration is shown.

[0092] Figure 81 An example of a network configuration is shown.

[0093] Figure 82 An example of the configuration of the server is shown.

[0094] Figure 83 An example of a network configuration is shown.

[0095] Figure 84 An example of the system configuration is shown.

[0096] Figure 85 An example of frame transmission timing is shown.

[0097] Figure 86 An example of frame transmission timing is shown.

[0098] Figure 87 An example of frame transmission timing is shown.

[0099] Figure 88 An example of frame transmission timing is shown.

[0100] Figure 89 An example of frame transmission timing is shown.

[0101] Figure 90 An example of frame transmission timing is shown.

[0102] Figure 91 An example of the configuration of an access point is shown.

[0103] Figure 92 An example of the configuration of a repeater is shown.

[0104] Figure 93 An example of the configuration of a repeater is shown.

[0105] Figure 94 An example of the configuration of a repeater is shown.

[0106] Figure 95 An example of frame transmission timing is shown.

[0107] Figure 96 An example of frame transmission timing is shown.

[0108] Figure 97 An example of the system configuration is shown.

[0109] Figure 98 An example of frame transmission timing is shown.

[0110] Figure 99 An example of frame transmission timing is shown.

[0111] Figure 100 An example of frame transmission timing is shown.

[0112] Figure 101 An example of frame transmission timing is shown.

[0113] Figure 102 An example of the configuration of an access point is shown.

[0114] Figure 103 An example of the configuration of an access point is shown.

[0115] Figure 104 An example of the system configuration is shown.

[0116] Figure 105 An example of the system configuration is shown.

[0117] Figure 106 An example of frame transmission timing is shown.

[0118] Figure 107 An example of frame transmission timing is shown.

[0119] Figure 108A An example of the transmission time of information is shown.

[0120] Figure 108B An example of the transmission time of information is shown.

[0121] Figure 109A An example of the transmission time of information is shown.

[0122] Figure 109B An example of the transmission time of information is shown.

[0123] Figure 110A An example of the transmission time of information is shown.

[0124] Figure 110B An example of the transmission time of information is shown.

[0125] Figure 111 An example of the system configuration is shown.

[0126] Figure 112A An example of the transmission time and frequency of frames is shown.

[0127] Figure 112B An example of the transmission time and frequency of frames is shown.

[0128] Figure 113A An example of the transmission time and frequency of frames is shown.

[0129] Figure 113B An example of the transmission time and frequency of frames is shown.

[0130] Figure 114 An example of a method for controlling a communication system is shown.

[0131] Figure 115 An example of a terminal control method is shown.

[0132] Figure 116 An example of the system configuration is shown.

[0133] Figure 117 An example of the transmission time and frequency of frames is shown.

[0134] Figure 118 An example of the transmission time and frequency of frames is shown.

[0135] Figure 119 An example of the transmission time and frequency of frames is shown.

[0136] Figure 120 An example of the transmission time and frequency of frames is shown.

[0137] Figure 121 An example of the system configuration is shown.

[0138] Figure 122 An example of the system configuration is shown.

[0139] Figure 123 An example of the system configuration is shown.

[0140] Figure 124 An example of frame transmission timing is shown.

[0141] Figure 125 An example of frame transmission timing is shown.

[0142] Figure 126 An example of frame transmission timing is shown.

[0143] Figure 127 An example of frame transmission timing is shown.

[0144] Figure 128 An example of frame transmission timing is shown.

[0145] Figure 129 An example of frame transmission timing is shown.

[0146] Figure 130 An example of the system configuration is shown.

[0147] Figure 131 An example of the system configuration is shown.

[0148] Figure 132A An example of the system configuration is shown.

[0149] Figure 132B An example of the system configuration is shown.

[0150] Figure 132C An example of the system configuration is shown.

[0151] Figure 133 An example of the configuration of a repeater is shown.

[0152] Figure 134 An example of a detailed configuration of a repeater is shown.

[0153] Figure 135 An example of a detailed configuration of a repeater is shown.

[0154] Figure 136 An example of a detailed configuration of a repeater is shown.

[0155] Figure 137 An example of a detailed configuration of a repeater is shown.

[0156] Figure 138 An example of a detailed configuration of a repeater is shown.

[0157] Figure 139 An example of a detailed configuration of a repeater is shown.

[0158] Figure 140 An example of a detailed configuration of a repeater is shown.

[0159] Figure 141 An example of a detailed configuration of a repeater is shown.

[0160] Figure 142 An example of the structure of a Beacon frame is shown.

[0161] Figure 143 An example of the structure of a Probe request frame is shown.

[0162] Figure 144 An example of the structure of a Probe response frame is shown.

[0163] Figure 145 An example of the structure of an Association request frame is shown.

[0164] Figure 146An example of the structure of an Association response frame is shown.

[0165] Figure 147 An example of the structure of an RTS frame is shown.

[0166] Figure 148 An example of the structure of a CTS frame is shown.

[0167] Figure 149 An example of the structure of an ACK frame is shown.

[0168] Figure 150 An example of the structure of a data frame is shown.

[0169] Figure 151A An example of the structure of a frame is shown.

[0170] Figure 151B An example of the structure of a frame is shown. DETAILED DESCRIPTION

[0171] A communication system according to one aspect of the present disclosure includes an access point, a first communication device, and a second communication device, and the communication system performs wireless communication with a terminal. The access point performs wireless communication with the first communication device using at least a first channel included in a first frequency band, and performs wireless communication with the second communication device using at least a second channel included in a second frequency band, where the second frequency band is different from the first frequency band. The first communication device performs wireless communication with the terminal using at least a third channel included in the second frequency band, and the second communication device performs wireless communication with the terminal using at least a fourth channel included in the first frequency band.

[0172] With the above-described aspect, in the communication system, since the frequency band (first frequency band) in which the access point transmits radio waves to the first communication device differs from the frequency band (second frequency band) in which the first communication device transmits radio waves to the terminal, interference between these radio waves can be avoided, thereby suppressing a decrease in data transmission efficiency. Similarly, since the frequency band (second frequency band) in which the access point transmits radio waves to the second communication device differs from the frequency band (first frequency band) in which the second communication device transmits radio waves to the terminal, interference between these radio waves can be avoided, thereby suppressing a decrease in data transmission efficiency. Furthermore, in the communication system, since the same frequency band (first frequency band) is used for communication between the access point and the first communication device and for communication between the second communication device and the terminal, and since the same frequency band (second frequency band) is used for communication between the access point and the second communication device and for communication between the first communication device and the terminal, the frequency band used by the entire communication system can be reduced compared to using different frequency bands for each communication. In this way, the communication system can reduce the frequency band used while suppressing a decrease in data transmission efficiency, thereby improving the performance of the communication system.

[0173] For example, the third channel is the same as the second channel, and the fourth channel is the same as the first channel.

[0174] With the above aspect, the communication system uses the same channel for communication between the access point and the first communication device, and for communication between the second communication device and the terminal. Furthermore, the same channel is used for communication between the access point and the second communication device, and for communication between the first communication device and the terminal. This reduces the number of channels used by the entire communication system compared to using separate channels. Consequently, the communication system can reduce the number of channels used and improve communication system performance.

[0175] For example, the first communication device and the second communication device may be arranged in a single housing.

[0176] According to the above aspect, the communication system can treat the first communication device and the second communication device as one device. Thus, the communication system can simplify the system configuration and improve the performance of the communication system.

[0177] For example, the access point may communicate with the first communication device and the second communication device using multiple access based on OFDMA (Orthogonal Frequency Division Multiple Access).

[0178] According to the above aspect, by adopting OFDMA-based multiple access between an access point and a communication device in a communication system, it is possible to increase channel utilization efficiency and improve the performance of the communication system.

[0179] For example, the terminal may include a plurality of terminals, and at least one of the first communication device and the second communication device may communicate with the plurality of terminals using OFDMA-based multiple access.

[0180] According to the above aspect, the communication system can improve channel utilization efficiency and performance of the communication system by adopting OFDMA-based multiple access between the communication device and the terminal.

[0181] For example, the access point may send a piece of data to the first communication device and the second communication device respectively, and when the first communication device receives the piece of data, it may send the received piece of data to the terminal, and when the second communication device receives the piece of data, it may send the received piece of data to the terminal.

[0182] With the above configuration, the communication system simultaneously transmits one piece of data from the access point to the terminal via the first communication device and simultaneously transmits the same data from the access point to the terminal via the second communication device. This improves the efficiency of data reception at the terminal and thus enhances the performance of the communication system.

[0183] Furthermore, a terminal involved in one aspect of the present disclosure performs wireless communication with a communication system, wherein the communication system includes an access point, a first communication device, and a second communication device, and the communication system performs wireless communication with the terminal, the access point performs wireless communication with the first communication device using at least a first channel included in a first frequency band, and performs wireless communication with the second communication device using at least a second channel included in a second frequency band, the second frequency band being different from the first frequency band, the first communication device performs wireless communication with the terminal using at least a third channel included in the second frequency band, and the second communication device performs wireless communication with the terminal using at least a fourth channel included in the first frequency band.

[0184] Through the above-mentioned form, the same effect as the above-mentioned communication system can be achieved.

[0185] Furthermore, a control method according to one aspect of the present disclosure is used in a communication system for wirelessly communicating with a terminal, the communication system comprising an access point, a first communication device, and a second communication device, wherein the communication system wirelessly communicates with the terminal, the access point wirelessly communicating with the first communication device using at least a first channel included in a first frequency band, and wirelessly communicating with the second communication device using at least a second channel included in a second frequency band, the second frequency band being different from the first frequency band, the first communication device wirelessly communicating with the terminal using at least a third channel included in the second frequency band, and the second communication device wirelessly communicating with the terminal using at least a fourth channel included in the first frequency band.

[0186] Through the above-mentioned form, the same effect as the above-mentioned communication system can be achieved.

[0187] Furthermore, a control method according to one aspect of the present disclosure is used for a terminal that wirelessly communicates with a communication system, wherein the communication system includes an access point, a first communication device, and a second communication device, and the communication system wirelessly communicates with the terminal, the access point wirelessly communicates with the first communication device using at least a first channel included in a first frequency band, and wirelessly communicates with the second communication device using at least a second channel included in a second frequency band, the second frequency band being different from the first frequency band, the first communication device wirelessly communicates with the terminal using at least a third channel included in the second frequency band, and the second communication device wirelessly communicates with the terminal using at least a fourth channel included in the first frequency band.

[0188] Through the above form, the same effect as the above terminal can be achieved.

[0189] In addition, these general or specific forms can be implemented by systems, methods, integrated circuits, computer programs, or computer-readable recording media such as CD-ROMs, or by any combination of systems, methods, integrated circuits, computer programs, or recording media.

[0190] The following describes the embodiments in detail with reference to the accompanying drawings.

[0191] In addition, the embodiments to be described below are all general or specific examples. The numerical values, shapes, materials, components, configuration positions of components, connection methods, steps, and the order of steps shown in the following embodiments are all examples, and their purpose is not to limit the present disclosure. Furthermore, among the components of the following embodiments, the components that are not recorded in the independent technical solutions showing the highest concept are described as arbitrary components.

[0192] (Implementation Method 1)

[0193] Figure 1 An example of the configuration of a base station (or access point, etc.) in this embodiment is shown.

[0194] 101-1 represents information #1, 101-2 represents information #2, ..., 101-M represents information #M. 101-i represents information #i. i is an integer from 1 to M. M is an integer from 2 to 2. It is not necessary for all information #1 to #M to be present.

[0195] Then, baseband signals corresponding to the respective information are collected and precoded. In addition, for example, OFDM (Orthogonal Frequency Division Multiplexing) may also be applied.

[0196] Wireless unit 104-1 receives processed signal 103-1 and control signal 159 as input, performs band limiting, frequency conversion, amplification, and other processing based on control signal 159, and outputs transmission signal 105-1. Transmission signal 105-1 is then output as radio waves from antenna unit 106-1.

[0197] Similarly, wireless unit 104-2 receives processed signal 103-2 and control signal 159 as input, performs bandwidth limitation, frequency conversion, amplification, and other processing based on control signal 159, and outputs transmit signal 105-2. Transmit signal 105-2 is then output from antenna unit 106-2 as a radio wave. The description of wireless units 104-3 through 104-(M-1) is omitted.

[0198] The wireless unit 104-M receives the processed signal 103-M and the control signal 159 as input, performs band limiting, 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 then output from the antenna unit 106-M as radio waves.

[0199] In addition, when each wireless unit does not have a signal after signal processing, the above-mentioned processing does not need to be performed.

[0200] The wireless unit group 153 receives 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 ​​.

[0201] Signal processing unit 155 receives baseband signal group 154 ​​as input and performs demodulation and error correction decoding, which also includes processing such as time synchronization, frequency synchronization, and channel estimation. Since signal processing unit 155 receives and processes modulated signals transmitted by one or more terminals, it obtains data and control information transmitted by each terminal. Consequently, signal processing unit 155 outputs data group 156 corresponding to one or more terminals and control information group 157 corresponding to one or more terminals.

[0202] 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 setting", "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 of these decisions.

[0203] Antenna units 106-1, 106-2, ..., 106-M take control signal 159 as input. Figure 2 The operation at this time will be described.

[0204] Figure 2 An example of the structure of antenna units 106-1, 106-2, ..., 106-M is shown. Figure 2 As shown, there are multiple antennas. Figure 2 Although four antennas are shown in FIG, each antenna unit only needs to include multiple antennas. In addition, the number of antennas is not limited to four.

[0205] Figure 2 : This is the configuration of antenna unit 106 - i , where i is an integer from 1 to M.

[0206] 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.

[0207] The multiplication unit 204-1 uses the signal 203-1 and the control signal 200 (equivalent to Figure 1The control signal 159 is input, and based on the multiplication coefficient information contained in the control signal 200, it multiplies the signal 203-1 by the coefficient W1, outputting the multiplied signal 205-1. Furthermore, the coefficient W1 is defined as 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) (where t is time). The multiplied signal 205-1 is then output as a radio wave from the antenna 206-1.

[0208] Similarly, multiplication unit 204-2 receives signal 203-2 and control signal 200 as inputs. Based on the multiplication coefficient information contained in control signal 200, it multiplies signal 203-2 by coefficient W2, and outputs the multiplied signal 205-2. Furthermore, coefficient W2 is defined as a complex number. Therefore, W2 can be a real number. Therefore, if signal 203-2 is v2(t), then the multiplied signal 205-2 can be expressed as W2×v2(t) (where t is time). Furthermore, the multiplied signal 205-2 is output from antenna 206-2 as a radio wave.

[0209] Multiplication unit 204-3 receives signal 203-3 and control signal 200 as input. Based on the multiplication coefficient information contained in control signal 200, it multiplies signal 203-3 by coefficient W3, and outputs the multiplied signal 205-3. Furthermore, coefficient W3 is defined as a complex number. Therefore, W3 can be a real number. Therefore, if signal 203-3 is v3(t), then the multiplied signal 205-3 can be expressed as W3×v3(t) (where t is time). Furthermore, the multiplied signal 205-3 is output from antenna 206-3 as a radio wave.

[0210] Multiplication unit 204-4 receives signal 203-4 and control signal 200 as input, multiplies signal 203-4 by coefficient W4 based on the multiplication coefficient information contained in control signal 200, and outputs the multiplied signal 205-4. Furthermore, coefficient W4 is defined as a complex number. Therefore, W4 can be a real number. Therefore, if signal 203-4 is v4(t), then the multiplied signal 205-4 can be expressed as W4 × v4(t) (where t is time). Furthermore, the multiplied signal 205-4 is output from antenna 206-4 as a radio wave.

[0211] 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.

[0212] 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 descriptions are omitted below.

[0213] Weighted synthesis unit 301 receives modulated signal 105-1, modulated signal 105-2, ..., modulated signal 105-M, and control signal 159 as input. Based on information regarding weighted synthesis included in control signal 159, weighted synthesis unit 301 performs weighted synthesis on modulated signal 105-1, modulated signal 105-2, ..., modulated signal 105-M, and outputs weighted synthesized signals 302-1, 302-2, ..., 302-K. K is an integer greater than or equal to 1. Weighted synthesized signal 302-1 is output as a radio wave from antenna 303-1, weighted synthesized signal 302-2 is output as a radio wave from antenna 303-2, ..., and weighted synthesized signal 302-K is output as a radio wave from antenna 303-K.

[0214] The weighted combined signal yi(t) 302-i (i is an integer from 1 to K) is expressed as follows (t is time).

[0215] [Formula 1]

[0216]

[0217] In addition, in formula (1), A ij is a value that can be defined using a complex number, so A ij Can take real numbers, x j (t) is the modulated signal 105-j. j is an integer greater than or equal to 1 and less than or equal to M.

[0218] Figure 4 An example of the terminal configuration 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.

[0219] 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.

[0220] Similarly, wireless unit 403-2 receives received signal 402-2 received by antenna unit 401-2 and control signal 410 as input, performs frequency conversion and other processing on received signal 402-2 based on control signal 410, and outputs baseband signal 404-2. The description of wireless units 403-3 through 403-(N-1) is omitted.

[0221] 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 processing such as frequency conversion on the reception signal 402-N based on the control signal, and outputs a baseband signal 404-N.

[0222] However, not all of the radio units 403-1, 403-2, ..., and 403-N need to be in operation, and therefore, the baseband signals 404-1, 404-2, ..., and 404-N do not necessarily all exist.

[0223] Signal processing unit 405 receives baseband signals 404-1, 404-2, ..., 404-N and control signal 410 as input, performs demodulation and error correction decoding based on control signal 410, and outputs data 406, transmission control information 407, and control information 408. Specifically, signal processing unit 405 also performs processing such as time synchronization, frequency synchronization, and channel estimation.

[0224] The setting unit 409 takes the control information 408 as input, performs settings regarding the reception method, and outputs a control signal 410 .

[0225] 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.

[0226] The wireless unit group 454 takes the baseband signal group 453 as input, performs band limitation, frequency conversion, amplification and other processing, and outputs a transmission signal group 455. The transmission signal group 455 is output from the transmission antenna group 456 as a radio wave.

[0227] 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, the multiple antennas shown Figure 5 Although four antennas are shown, each antenna unit may be provided with multiple antennas.

[0228] Figure 5 This is the structure of antenna unit 401-i, where i is an integer greater than or equal to 1 and less than or equal to N.

[0229] 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 500 receives control signal 410 as input, multiplies received signal 502-1 by coefficient D1 based on the multiplication coefficient information contained in control signal 500, and outputs a multiplied signal 504-1. Furthermore, coefficient D1 can be defined using a complex number. Therefore, D1 can be a real number. Therefore, if received signal 502-1 is e1(t), then multiplied signal 504-1 can be expressed as D1 × e1(t) (where t is time).

[0230] Similarly, multiplication unit 503-2 takes received signal 502-2 received by antenna 501-2 and control signal 500 as input, multiplies received signal 502-2 by coefficient D2 based on the multiplication coefficient information included in control signal 500, and outputs multiplied signal 504-2. Furthermore, coefficient D2 can be defined using a complex number. Therefore, D2 can be a real number. Therefore, if received signal 502-2 is e2(t), then multiplied signal 504-2 can be expressed as D2 × e2(t) (where t is time).

[0231] Multiplication unit 503-3 takes received signal 502-3 received by antenna 501-3 and control signal 500 as input. Based on the multiplication coefficient information contained in control signal 500, it multiplies received signal 502-3 by coefficient D3 and outputs multiplied signal 504-3. Furthermore, coefficient D3 can be defined using a complex number. Therefore, D3 can be a real number. Therefore, if received signal 502-3 is e3(t), multiplied signal 504-3 can be expressed as D3 × e3(t) (where t is time).

[0232] Multiplication unit 503-4 takes received signal 502-4 received by antenna 501-4 and control signal 500 as input. Based on the multiplication coefficient information contained in control signal 500, it multiplies received signal 502-4 by coefficient D4 and outputs multiplied signal 504-4. Furthermore, coefficient D4 can be defined using a complex number. Therefore, D4 ​​can be a real number. Therefore, if received signal 502-4 is e4(t), multiplied signal 504-4 can be expressed as D4 × e4(t) (where t is time).

[0233] 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).

[0234] Figure 6This embodiment shows Figure 4 The structure of the terminal is different from the structure of the terminal. Figure 6 In the Figure 4 The same operations are assigned the same reference numerals and their descriptions are omitted below.

[0235] Multiplication unit 603-1 takes received signal 602-1 received by antenna 601-1 and control signal 410 as input. Based on the multiplication coefficient information included in control signal 410, it multiplies received signal 602-1 by coefficient G1 and outputs multiplied signal 604-1. Furthermore, coefficient G1 can be defined using a complex number. Therefore, G1 can be a real number. Therefore, if received signal 602-1 is c1(t), multiplied signal 604-1 can be expressed as G1 × c1(t) (where t is time).

[0236] Similarly, multiplication unit 603-2 receives received signal 602-2 received by antenna 601-2 and control signal 410 as input. Based on the multiplication coefficient information included in control signal 410, it multiplies received signal 602-2 by coefficient G2, and outputs multiplied signal 604-2. Furthermore, coefficient G2 can be defined using a complex number. Therefore, G2 can be a real number. Therefore, if received signal 602-2 is c2(t), then multiplied signal 604-2 can be expressed as G2×c2(t), where t is time. The descriptions of multiplication units 603-3 through 603-(L-1) are omitted.

[0237] Multiplication unit 603-L takes received signal 602-L received by antenna 601-L and control signal 410 as inputs. Based on the multiplication coefficient information included in control signal 410, it multiplies received signal 602-L by coefficient GL, and outputs a multiplied signal 604-L. Furthermore, coefficient GL can be defined using complex numbers. Therefore, GL can be a real number. Therefore, if received signal 602-L is cL(t), then multiplied signal 604-L can be expressed as GL × cL(t) (where t is time).

[0238] Therefore, multiplication unit 603-i takes received signal 602-i received by antenna 601-i and control signal 410 as input, multiplies received signal 602-i by coefficient Gi based on the multiplication coefficient information contained in control signal 410, and outputs multiplied signal 604-i. Furthermore, coefficient Gi can be defined using complex numbers. Therefore, Gi can be a real number. Therefore, if received signal 602-i is ci(t), then multiplied signal 604-i can be expressed as Gi × ci(t) (where t is time). Furthermore, i is an integer from 1 to L, and L is an integer from 2 to 4.

[0239] Here, the processing unit 605 receives 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 or equal to 2. In this case, the multiplied signal 604-i is represented by 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 or equal to 1 and less than or equal to N).

[0240] [Formula 2]

[0241]

[0242] 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.

[0243] 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 broadcast station, etc.

[0244] The base station 700 has multiple antennas and transmits multiple transmission signals from the transmission antenna 701. Figure 1 、 Figure 3 In the illustrated configuration, precoding (weighted combining) is performed in the signal processing section 102 (and / or the weighted combining section 301 ) to thereby perform transmit beamforming (directivity control).

[0245] 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.

[0246] 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.

[0247] In addition, Figure 7 Although the number of transmission beams for transmitting data of stream 1 is set to 3 and the number of transmission beams for transmitting data of stream 2 is set to 3, it is not limited to this. As long as there are multiple transmission beams for transmitting data of stream 1 and multiple transmission beams for transmitting data of stream 2, it will suffice.

[0248] Figure 7Including terminals 704-1, 704-2, 704-3, 704-4, 704-5, for example Figure 4 、 Figure 5 The terminals have the same structure as shown.

[0249] For example, terminal 704-1 controls the directionality during reception using 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, thereby generating reception directivity 705-1 and reception directivity 706-1. Furthermore, reception directivity 705-1 enables terminal 704-1 to receive and demodulate transmit beam 702-1, which is used to transmit data for stream 1. Reception directivity 706-1 enables terminal 704-1 to receive and demodulate transmit beam 703-1, which is used to transmit data for stream 2.

[0250] Similarly, terminal 704-2 controls the directionality during reception using 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, thereby generating reception directivity 705-2 and reception directivity 706-2. Reception directivity 705-2 enables terminal 704-2 to receive and demodulate transmit beam 702-1, which is used to transmit data for stream 1. Reception directivity 706-2 enables terminal 704-2 to receive and demodulate transmit beam 703-1, which is used to transmit data for stream 2.

[0251] 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.

[0252] 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.

[0253] Terminal 704-4 controls the directionality during reception using 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, generating reception directivity 705-4 and reception directivity 706-4. Furthermore, reception directivity 705-4 enables terminal 704-4 to receive and demodulate transmit beam 702-3, which is used to transmit data for stream 1. Reception directivity 706-4 enables terminal 704-4 to receive and demodulate transmit beam 703-2, which is used to transmit data for stream 2.

[0254] Terminal 704-5 controls the directionality during reception using 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, generating reception directivity 705-5 and reception directivity 706-5. Furthermore, reception directivity 705-5 enables terminal 704-5 to receive and demodulate transmit beam 702-3, which is used to transmit data for stream 1. Reception directivity 706-5 enables terminal 704-5 to receive and demodulate transmit beam 703-3, which is used to transmit data for stream 2.

[0255] exist Figure 7 In the embodiment, the terminal selects at least one transmission beam from among the transmission beams 702-1, 702-2, and 702-3 for transmitting the data of stream 1 according to the spatial position, and obtains the data of stream 1 with higher quality through the directivity toward the receiving end. In addition, the terminal selects at least one transmission beam from among the transmission beams 703-1, 703-2, and 703-3 for transmitting the data of stream 2 according to the spatial position, and obtains the data of stream 2 with higher quality through the directivity toward the receiving end.

[0256] Furthermore, base station 700 transmits transmission beam 702-1 for transmitting data for stream 1 and transmission beam 703-1 for transmitting data for stream 2 using the same frequency (same frequency band) and at the same time. Furthermore, base station 700 transmits transmission beam 702-2 for transmitting data for stream 1 and transmission beam 703-2 for transmitting data for stream 2 using the same frequency (same frequency band) and at the same time. Furthermore, base station 700 transmits transmission beam 702-3 for transmitting data for stream 1 and transmission beam 703-3 for transmitting data for stream 2 using the same frequency (same frequency band) and at the same time.

[0257] Furthermore, transmission beams 702-1, 702-2, and 702-3 used to transmit data for stream 1 may be beams of the same frequency (same frequency band) or beams of different frequencies (different frequency bands). Transmission beams 703-1, 703-2, and 703-3 used to transmit data for stream 2 may be beams of the same frequency (same frequency band) or beams of different frequencies (different frequency bands).

[0258] right Figure 1 、 Figure 3 The operation of the base station setting unit 158 ​​in is described.

[0259] 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 that “transmission for multicast is to be performed” is input to the setting unit 158 ​​through the setting signal 160 .

[0260] The setting signal 160 includes information on the number of transmission streams when performing multicast. Figure 7 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.

[0261] 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 the transmission shown, information that “the number of transmission beams of the transmission stream 1 is 3, and the number of transmission beams of the transmission stream 2 is 3” is input to the setting unit 158 ​​through the setting signal 160 .

[0262] in addition, Figure 1 、 Figure 3 The base station can also transmit control information symbols within data symbols, including information such as whether to transmit for multicast or unicast, the number of transmission streams when performing multicast, and the number of transmit beams used to transmit each stream. This allows terminals to perform appropriate reception. The structure of the control information symbols will be described in detail later.

[0263] 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 the #1 information 101-1 to obtain error-corrected coded data. The error-corrected coded data is named #1 transmission data. Furthermore, the #1 transmission data is mapped to obtain data symbols, and the data symbols are divided into 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 Furthermore, 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.

[0264] Figure 9 An example of a frame structure is shown when the horizontal axis represents time.

[0265] Figure 9 Symbol group #1 901-1 of stream 1 is Figure 7 The symbol group of the transmission beam 702-1 for transmitting data of stream 1.

[0266] Figure 9 Symbol group #2 901-2 of stream 1 is Figure 7 The symbol group of the transmission beam 702-2 for transmitting data of stream 1.

[0267] Figure 9 Symbol group #3 901-3 of stream 1 is Figure 7 The symbol group of the transmission beam 702-3 for transmitting data of stream 1.

[0268] Figure 9 Symbol group #1 902-1 of stream 2 is Figure 7 The symbol group of the transmission beam 703-1 for transmitting data of stream 2.

[0269] Figure 9 Symbol group #2 902-2 of stream 2 is Figure 7 The symbol group of the transmission beam 703-2 for transmitting data of stream 2.

[0270] Figure 9 Symbol group #3 902-3 of stream 2 is Figure 7 The symbol group of the transmission beam 703-3 for transmitting data of stream 2.

[0271] 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.

[0272] 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).

[0273] 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 based on 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." 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."

[0274] 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".

[0275] at this time, Figure 9 The #1 symbol group 901-1 of stream 1 includes "data symbol group A-1 of stream 1". Figure 9 The #2 symbol group 901-2 of stream 1 includes "data symbol group A-2 of stream 1". Figure 9 Stream 1 #3 symbol group 901-3 includes "stream 1 data symbol group A-3." That is, stream 1 #1 symbol group 901-1, stream 1 #2 symbol group 901-2, and stream 1 #3 symbol group 901-3 include the same data symbol group.

[0276] 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" is prepared; 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" is prepared; 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" is prepared.

[0277] 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".

[0278] at this time, Figure 9 The first symbol group 902-1 of stream 2 includes "data symbol group A-1 of stream 2". Figure 9 The symbol group #2 902-2 of stream 2 includes "data symbol group A-2 of stream 2". Figure 9 Stream 2 #3 symbol group 902-3 includes "stream 2 data symbol group A-3." That is, stream 2 #1 symbol group 902-1, stream 2 #2 symbol group 902-2, and stream 2 #3 symbol group 902-3 include the same data symbol group.

[0279] Figure 10 Shown Figure 9 This is an example of a frame structure of "Symbol group #Y of stream X" (X=1, 2; Y=1, 2, 3). Figure 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 Figure 9 The symbols transmitted by the "data symbol group A of stream 1" or the "data symbol group A of stream 2" are described.

[0280] In addition, Figure 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 affected by Figure 10 Therefore, the control information symbol 1001 and the stream data symbol group 1002 can be arbitrarily arranged. In addition, the reference symbol is sometimes called a preamble or a pilot symbol.

[0281] Next, the structure of the control information symbol 1001 will be described.

[0282] Figure 11 Shown as Figure 10 An example of the structure of the code element sent as a control information code element, with the horizontal axis being time. Figure 11In the present invention, the terminal receives the "training code element for terminal reception directivity control" 1101, thereby determining the signal processing method for directivity control during reception 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".

[0283] By receiving the "symbol for notifying the number of transmission streams during multicast" 1102, the terminal knows the number of streams it needs to obtain.

[0284] By receiving the “symbol for notifying which stream the data symbols belong to” 1103 , the terminal can know which stream among the streams transmitted by the base station can be received.

[0285] An example related to the above will be described.

[0286] like Figure 7 As shown in FIG, the case where the base station transmits the stream and the transmission beam is described. Figure 9 The specific information of the control information codeword in the #1 codeword group 901-1 of stream 1 is explained.

[0287] 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".

[0288] And, because Figure 9 Symbol group #1 901-1 of stream 1 transmits data symbols of stream 1, so information "of which stream is the data symbol for passing the stream" 1103 is information of "stream 1".

[0289] For example, the terminal receives Figure 9 The following describes the case of symbol group #1 901-1 of stream 1. At this point, the terminal recognizes that "the number of transmission streams is 2" from "symbol for notifying the number of transmission streams during multicast" 1102, and recognizes "data symbols for stream 1" from "symbol for notifying which stream the data symbol group belongs to" 1103.

[0290] After this, since the terminal recognizes that "the number of transmission streams is 2" and the data symbols obtained are "data symbols of stream 1", it recognizes that it needs to obtain "data symbols of stream 2". Therefore, the terminal can start the operation of searching for the symbol group of stream 2. For example, the terminal searches Figure 9 The transmission beam of one of the #1 codeword group 902-1 of stream 2, the #2 codeword group 902-2 of stream 2, and the #3 codeword group 902-3 of stream 2.

[0291] Then, the terminal obtains data symbols for both stream 1 and stream 2 by obtaining a transmit beam of one of symbol group #1 902-1 for stream 2, symbol group #2 902-2 for stream 2, and symbol group #3 902-3 for stream 2.

[0292] By configuring the control information symbols in this way, it is possible to achieve the effect that the terminal can reliably obtain the data symbols.

[0293] As shown above, in multicast 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. 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.

[0294] Furthermore, in the above description, although it has been described that the terminal performs reception directivity control, the above-mentioned effects can be obtained even if the terminal does not perform reception directivity control.

[0295] in addition, Figure 10 The modulation scheme of "stream data symbol group" 1002 may be any modulation scheme, and the mapping method of the modulation scheme of "stream data symbol group" 1002 may be switched for each symbol. In other words, after mapping, the phase of the constellation diagram on the in-phase I-quadrature Q plane may be switched for each symbol.

[0296] Figure 12 Shows the communication status between the base station and the terminal Figure 7 Different examples. In addition, Figure 12 In relation to Figure 7 The same actions are given the same labels.

[0297] The base station 700 has multiple antennas and transmits multiple transmission signals from the transmission antenna 701. Figure 1 、 Figure 3 In the illustrated configuration, precoding (weighted combining) is performed in the signal processing section 102 (and / or the weighted combining section 301), thereby performing transmit beamforming (directivity control).

[0298] and, Figure 12 It shows a transmission beam 1202-1 used to transmit "modulation signal 1", a transmission beam 1202-2 used to transmit "modulation signal 1", and a transmission beam 1202-3 used to transmit "modulation signal 1".

[0299] Figure 12It shows the transmission beam 1203-1 used to transmit the "modulation signal 2", the transmission beam 1203-2 used to transmit the "modulation signal 2", and the transmission beam 1203-3 used to transmit the "modulation signal 2".

[0300] In addition, Figure 12 In the example, the number of transmission beams used to transmit "Modulation Signal 1" is assumed to be three, and the number of transmission beams used to transmit "Modulation Signal 2" is assumed to be three. However, this is not limiting; any number of transmission beams used to transmit "Modulation Signal 1" and multiple transmission beams used to transmit "Modulation Signal 2" are sufficient. "Modulation Signal 1" and "Modulation Signal 2" will be described in detail later.

[0301] Figure 12 Including terminals 704-1, 704-2, 704-3, 704-4, 704-5, for example Figure 4 、 Figure 5 The same structure as the terminal in .

[0302] For example, terminal 704-1 controls the directionality during reception using 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, thereby generating reception directivity 705-1 and reception directivity 706-1. Furthermore, reception directivity 705-1 enables terminal 704-1 to receive and demodulate transmit beam 1202-1, which transmits "modulated signal 1." Reception directivity 706-1 enables terminal 704-1 to receive and demodulate transmit beam 1203-1, which transmits "modulated signal 2."

[0303] Similarly, terminal 704-2 controls the directionality during reception using 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, generating reception directivity 705-2 and reception directivity 706-2. Furthermore, reception directivity 705-2 enables terminal 704-2 to receive and demodulate transmit beam 1202-1, which transmits "modulated signal 1." Reception directivity 706-2 enables terminal 704-2 to receive and demodulate transmit beam 1203-1, which transmits "modulated signal 2."

[0304] Terminal 704-3 controls the directionality 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 705-3 and reception directivity 706-3.

[0305] Furthermore, through the reception directivity 705-3, the terminal 704-3 can receive and demodulate the transmission beam 1202-2 used to transmit "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 "modulation signal 2".

[0306] Terminal 704-4 controls the directionality during reception using 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, generating reception directivity 705-4 and reception directivity 706-4. Furthermore, reception directivity 705-4 enables terminal 704-4 to receive and demodulate transmit beam 1202-3, which transmits "modulated signal 1." Reception directivity 706-4 enables terminal 704-4 to receive and demodulate transmit beam 1203-2, which transmits "modulated signal 2."

[0307] Terminal 704-5 controls the directionality 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, generating reception directivity 705-5 and reception directivity 706-5. Furthermore, reception directivity 705-5 enables terminal 704-5 to receive and demodulate transmit beam 1202-3, which transmits "modulated signal 1." Reception directivity 706-5 enables terminal 704-5 to receive and demodulate transmit beam 1203-3, which transmits "modulated signal 2."

[0308] Figure 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 through 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 through the directivity toward the receiving side.

[0309] Furthermore, base station 700 transmits transmit beam 1202-1, used to transmit "modulation signal 1," and transmit beam 1203-1, used to transmit "modulation signal 2," using the same frequency (same frequency band) and at the same time. Furthermore, base station 700 transmits transmit beam 1202-2, used to transmit "modulation signal 1," and transmit beam 1203-2, used to transmit "modulation signal 2," using the same frequency (same frequency band) and at the same time. Furthermore, base station 700 transmits transmit beam 1202-3, used to transmit "modulation signal 1," and transmit beam 1203-3, used to transmit "modulation signal 2," using the same frequency (same frequency band) and at the same time.

[0310] Furthermore, transmit 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). Transmit 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).

[0311] right Figure 1 、 Figure 3 The operation of the base station setting unit 158 ​​in is described.

[0312] 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 12 In the case of the transmission shown, information that “transmission for multicast is to be performed” is input to the setting unit 158 ​​through the setting signal 160 .

[0313] The setting signal 160 includes information on the number of modulated signals to be sent when performing multicast. Figure 12 In the case of transmission shown, information that “the number of transmission modulation signals is 2” is input to the setting unit 158 ​​through the setting signal 160 .

[0314] In addition, the setting signal 160 may also include information on "how many transmission beams each modulated signal is to be transmitted with". Figure 12 In the case of transmission shown, 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 .

[0315] in addition, Figure 1 、 Figure 3The base station can also transmit control information symbols containing information such as "whether transmission is for multicast or unicast," "the number of modulated signals to be transmitted when performing multicast," and "the number of transmit beams used to transmit each modulated signal." This allows the terminal to perform appropriate reception. The structure of the control information symbols will be described in detail later.

[0316] Figure 13 Is used to illustrate Figure 1 、 Figure 3 #i Information 101-i and Use Figure 12 A diagram illustrating the relationship between "modulation signal 1" and "modulation signal 2".

[0317] For example, error correction coding and other processing are performed on information #1 101-1 to obtain error-correction-encoded data. This error-correction-encoded data is named transmit data #1. Furthermore, transmit data #1 is mapped to obtain data symbols, which are then divided into data symbols for stream 1 and data symbols for stream 2, resulting in data symbols (data symbol groups) for stream 1 and data symbols (data symbol groups) for stream 2. In this case, the data symbols for stream 1 in symbol number i are s1(i), and the data symbols for stream 2 are s2(i). Thus, "modulated signal 1" tx1(i) in symbol number i is represented, for example, as follows.

[0318] [Formula 3]

[0319] tx1(i)=α(i)×s1(i)+β(i)×s2(i) Formula (3)

[0320] Furthermore, the "modulated signal 2" tx2(i) in symbol number i is expressed as follows, for example.

[0321] [Formula 4]

[0322] tx2(i)=γ(i)×s1(i)+δ(i)×s2(i) Formula (4)

[0323] In equations (3) and (4), α(i) can be defined as a complex number (and therefore, a real number), β(i) can be defined as a complex number (and therefore, a real number), γ(i) can be defined as a complex number (and therefore, a real number), and δ(i) can be defined as a complex number (and therefore, a real number). Furthermore, although α(i) is expressed, it does not have to be a function of the symbol number i (it can be a fixed value), although β(i) is expressed, it does not have to be a function of the symbol number i (it can be a fixed value), although γ(i) is expressed, it does not have to be a function of the symbol number i (it can be a fixed value), and although δ(i) is expressed, it does not have to be a function of the symbol number i (it can be a fixed value).

[0324] Furthermore, the "symbol group of the modulation signal 1" including the "signal of the data transmission area of ​​the modulation signal 1" composed of data symbols is converted from Figure 1 、 Figure 3 And, the "modulation signal 2 codeword group" containing the "signal of the data transmission area of ​​the modulation signal 2" composed of data codewords is sent from Figure 1 、 Figure 3 The base station sends it.

[0325] Furthermore, 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.

[0326] Figure 14 An example of a frame structure is shown when the horizontal axis represents time.

[0327] Figure 14 The first symbol group (1401-1) of the modulation signal 1 is Figure 12 The codeword group of the transmitting beam 1202-1 used to transmit the data of the modulated signal 1.

[0328] Figure 14 The #2 symbol group (1401-2) of the modulation signal 1 is Figure 12 The codeword group of the transmitting beam 1202-2 used to transmit the data of the modulated signal 1.

[0329] Figure 14 The symbol group #3 (1401-3) of the modulation signal 1 is Figure 12 The codeword group of the transmitting beam 1202-3 used to transmit the data of the modulated signal 1.

[0330] Figure 14 The first symbol group (1402-1) of the modulation signal 2 is Figure 12 The codeword group of the transmitting beam 1203-1 used to transmit the data of the modulated signal 2.

[0331] Figure 14 The symbol group #2 (1402-2) of the modulation signal 2 is Figure 12 The codeword group of the transmitting beam 1203-2 used to transmit the data of the modulated signal 2.

[0332] Figure 14 The symbol group #3 (1402-3) of the modulation signal 2 is Figure 12 The codeword group of the transmitting beam 1203-3 used to transmit the data of the modulated signal 2.

[0333] Therefore, the #1 codeword group (1401-1) of modulation signal 1, the #2 codeword group (1401-2) of modulation signal 1, the #3 codeword group (1401-3) of modulation signal 1, the #1 codeword group (1402-1) of modulation signal 2, the #2 codeword group (1402-2) of modulation signal 2, and the #3 codeword group (1402-3) of modulation signal 2 exist in time interval 1, for example.

[0334] 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).

[0335] For example, Figure 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.

[0336] Furthermore, a signal "Signal A-1 in the Data Transmission Area of ​​Modulated Signal 1" is prepared, which is composed of signals equivalent to the signals 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 prepared, which is composed of signals equivalent to the signals 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 prepared, which is composed of signals equivalent to the signals constituting "Signal A in the Data Transmission Area of ​​Modulated Signal 1." (That is, the signals constituting "Signal Group A-1 in the Data Transmission Area of ​​Modulated Signal 1," the signals constituting "Signal A-2 in the Data Transmission Area of ​​Modulated Signal 1," and the signals constituting "Signal A-3 in the Data Transmission Area of ​​Modulated Signal 1" are identical.)

[0337] at this time, Figure 14 The first symbol group (1401-1) of the modulation signal 1 includes the "signal A-1 in the data transmission area of ​​the modulation signal 1". Figure 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". Figure 14 Symbol group #3 (1401-3) of modulated signal 1 includes "Signal A-3 in the data transmission area of ​​modulated signal 1." In other words, symbol group #1 (1401-1) of modulated signal 1, symbol group #2 (1401-2) of modulated signal 1, and symbol group #3 (1401-3) of modulated signal 1 all contain the same signal.

[0338] Furthermore, a signal "Signal A-1 in the Data Transfer Area of ​​Modulated Signal 2" is prepared, which is composed of a signal equivalent to the signal constituting "Signal A in the Data Transfer Area of ​​Modulated Signal 2," a signal "Signal A-2 in the Data Transfer Area of ​​Modulated Signal 2" is prepared, which is composed of a signal equivalent to the signal constituting "Signal A in the Data Transfer Area of ​​Modulated Signal 2," and a signal "Signal A-3 in the Data Transfer Area of ​​Modulated Signal 2" is prepared, which is composed of a signal equivalent to the signal constituting "Signal A in the Data Transfer Area of ​​Modulated Signal 2." (That is, the signal constituting "Signal A-1 in the Data Transfer Area of ​​Modulated Signal 2," the signal constituting "Signal A-2 in the Data Transfer Area of ​​Modulated Signal 2," and the signal constituting "Signal A-3 in the Data Transfer Area of ​​Modulated Signal 2" are identical.)

[0339] at this time, Figure 14 The first symbol group (1402-1) of the modulation signal 2 includes the "signal A-1 in the data transmission area of ​​the modulation signal 2". Figure 14 The symbol group #2 (1402-2) of stream 2 includes "signal A-2 in the data transmission area of ​​modulated signal 2". Figure 14 Symbol group #3 (1402-3) of modulated signal 2 includes "Signal A-3 in the data transmission area of ​​modulated signal 2." In other words, symbol group #1 (1402-1) of modulated signal 2, symbol group #2 (1402-2) of modulated signal 2, and symbol group #3 (1402-3) of modulated signal 2 all contain the same signal.

[0340] Figure 15 Shown Figure 14 An example of the frame structure of the "symbol group #Y of the modulation signal X" (X=1, 2; Y=1, 2, 3) is described. Figure 15 In the figure, the horizontal axis is time, 1501 is the control information code element, 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. Figure 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.

[0341] In addition, Figure 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 receiver to perform time and frequency synchronization, a reference code element for the receiver to detect signals, a reference code element for the receiver to perform channel estimation, etc. In addition, the frame structure is not affected by Figure 15Therefore, the control information symbol 1501 and the modulated 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.

[0342] Next, the structure of control information symbol 1501 is described.

[0343] Figure 16 Shown as Figure 15 An example of the structure of the code element sent as a control information code element, with the horizontal axis being time. Figure 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".

[0344] 1602 is a “symbol for notifying the number of modulated signals to be transmitted during multicasting”. By receiving “symbol for notifying the number of modulated signals to be transmitted during multicasting” 1602, the terminal can know the number of modulated signals it needs to obtain.

[0345] 1603 is the "code element for notifying which modulation signal sending area is used for data transmission of the modulation signal". By receiving the "code element for notifying which modulation signal sending area is used 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.

[0346] An example related to the above will be described.

[0347] like Figure 12 As shown in FIG, consider the case where the base station transmits the "modulation signal" and the transmission beam. Figure 14 The specific information of the control information codeword in the #1 codeword group 1401-1 of the modulation signal 1 is explained.

[0348] exist Figure 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 when multicasting" 1602 is "2".

[0349] And, because Figure 14The #1 codeword group 1401-1 of the modulation signal 1 sends the 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 used for the modulation signal" 1603 is the information of "modulation signal 1".

[0350] For example, suppose the terminal receives Figure 14 At this time, the terminal recognizes "modulation signal number 2" based on "symbol for notifying the number of modulation signals transmitted during multicast" 1602, and recognizes "modulation signal 1" based on "symbol for notifying which modulation signal transmission area is used for data transmission of the modulation signal" 1603.

[0351] Then, the terminal recognizes that there is "Modulation Signal Number 2" and the obtained modulation signal is "Modulation Signal 1", so it recognizes that it needs to obtain "Modulation Signal 2". Therefore, the terminal can start the operation of searching for "Modulation Signal 2". For example, the terminal searches Figure 14 The transmitting beam of one of the "#1 codeword group of modulation signal 2" 1402-1, "#2 codeword group of modulation signal 2" 1402-2, and "#3 codeword group of modulation signal 2" 1402-3.

[0352] In addition, the terminal obtains both "modulation signal 1" and "modulation signal 2" by obtaining a certain transmission beam of "modulation signal 2 #1 codeword group" 1402-1, "modulation signal 2 #2 codeword group" 1402-2, and "modulation signal 2 #3 codeword group" 1402-3, and can obtain the data codewords of stream 1 and the data codewords of stream 2 with high quality.

[0353] By configuring the control information symbols in this way, it is possible to achieve the effect that the terminal can reliably obtain the data symbols.

[0354] As described above, in multicast and broadcast data transmission, the base station transmits data symbols using multiple transmit beams, and the terminal selectively receives the best-quality beam from these multiple transmit beams. This increases the area where the modulated signal transmitted by the base station can be received with high data quality. This is due to the base station performing transmit and receive directivity control.

[0355] Furthermore, in the above description, although it is described that the terminal performs reception directivity control, the above-mentioned effects can be obtained even if the terminal does not perform reception directivity control.

[0356] In addition, Figure 7In the description, each terminal receives both the modulated signal for stream 1 and the modulated signal for stream 2. However, the present invention is not limited to this embodiment. For example, a terminal may receive a modulated signal for stream 1, a terminal may receive a modulated signal for stream 2, or a terminal may receive both the modulated signal for stream 1 and the modulated signal for stream 2. Alternatively, different terminals may receive different modulated signals.

[0357] (Implementation Method 2)

[0358] In Embodiment 1, a method was described in which a base station transmits data symbols using multiple transmit beams in multicast and broadcast data transmission. In this embodiment, as a variation of Embodiment 1, a case is described in which a base station performs both multicast and broadcast data transmissions and unicast data transmission.

[0359] Figure 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.

[0360] The base station 700 has multiple antennas and transmits multiple transmission signals from the transmission antenna 701. Figure 1 、 Figure 3 With such a configuration, transmission beamforming (directivity control) is performed by performing precoding (weighted combining) in the signal processing unit 102 (and / or the weighted combining unit 301).

[0361] 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 transmission beams 702-1, 702-2, 702-3, 703-1, 703-2, and 703-3. Figure 7 The description is the same as , so it is omitted here.

[0362] Furthermore, regarding 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, due to the use of Figure 7 The description is the same as , so it is omitted here.

[0363] exist Figure 17 The characteristic feature of the system is that the base station Figure 7 Multicast is performed as described above, and the base station 700 and the terminal (for example, 1702) perform unicast communication.

[0364] In addition to the multicast transmission beams 702-1, 702-2, 702-3, 703-1, 703-2, and 703-3, the base station 700 also transmits Figure 17 In addition, a transmission beam 1701 for unicast is generated and data is transmitted to terminal 1702 separately. Figure 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 (or multiple modulated signals) to the terminal 1702.

[0365] Terminal 1702 then generates reception directivity 1703 for directivity control during reception using signal processing unit 405 and / or antennas 401-1 to 401-N and / or multiplication units 603-1 to 603-L and signal processing unit 605. This allows terminal 1702 to receive and demodulate transmit beam 1701.

[0366] 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 combining unit 301) in the illustrated configuration performs precoding (weighted combining).

[0367] Conversely, when terminal 1702 transmits a modulated signal to base station 700, terminal 1702 performs precoding (or weighted synthesis) and transmits transmit beam 1703. Base station 700 then forms receive directivity 1701 for directivity control during reception. This allows base station 700 to receive and demodulate transmit beam 1703.

[0368] Furthermore, base station 700 transmits transmit beam 702-1 for transmitting data for stream 1 and transmit beam 703-1 for transmitting data for stream 2 at the same frequency (same frequency band) and at the same time. Furthermore, base station 700 transmits transmit beam 702-2 for transmitting data for stream 1 and transmit beam 703-2 for transmitting data for stream 2 at the same frequency (same frequency band) and at the same time. Furthermore, base station 700 transmits transmit beam 702-3 for transmitting data for stream 1 and transmit beam 703-3 for transmitting data for stream 2 at the same frequency (same frequency band) and at the same time.

[0369] Furthermore, transmission beams 702-1, 702-2, and 702-3 used to transmit data for stream 1 may be beams of the same frequency (same frequency band) or beams of different frequencies (different frequency bands). Transmission beams 703-1, 703-2, and 703-3 used to transmit data for stream 2 may be beams of the same frequency (same frequency band) or beams of different frequencies (different frequency bands).

[0370] 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).

[0371] In addition, Figure 17 In the description, although the terminal performing unicast communication is described as one, the number of terminals performing unicast communication with the base station may be multiple.

[0372] At this time, the structure of the base station Figure 1 、 Figure 3 The operation of the setting unit 158 ​​in will be described.

[0373] 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 17 In the case of the transmission shown, information that “both multicast transmission and unicast transmission are performed” is input to the setting unit 158 ​​through the setting signal 160 .

[0374] At the same time, the setting signal 160 includes the information of "number of transmission streams when performing multicast", and the base station performs Figure 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.

[0375] Furthermore, the setting signal 160 may also include information on “how many transmission beams are used to transmit each stream”. Figure 17 In the case of the transmission shown, information that “the number of transmission beams of the transmission stream 1 is 3, and the number of transmission beams of the transmission stream 2 is 3” is input to the setting unit 158 ​​through the setting signal 160 .

[0376] in addition, Figure 1 、 Figure 3 The base station can also transmit control information symbols containing information such as "whether to transmit for multicast or unicast," "the number of transmission streams when performing multicast," and "how many transmission beams are used to transmit each stream." This allows the terminal to perform appropriate reception.

[0377] 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.

[0378] Figure 18 An example of the communication status between a base station (or access point, etc.) and a terminal is shown. Figure 7 、 Figure 12 The same operations are given the same reference numerals and detailed descriptions are omitted.

[0379] The base station 700 has multiple antennas and transmits multiple transmission signals from the transmission antenna 701. Figure 1 、 Figure 3 In the illustrated configuration, transmission beamforming (directivity control) is performed by performing precoding (weighted combining) in the signal processing section 102 (and / or the weighted combining section 301).

[0380] Furthermore, regarding the description of the transmission beams 1202-1, 1202-2, 1202-3, 1203-1, 1203-2, and 1203-3, since the same Figure 12 The description is the same as , so it is omitted.

[0381] Furthermore, regarding 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, due to the use of Figure 12 The description is the same as , so it is omitted.

[0382] exist Figure 18 The characteristic is that the base station Figure 12 Multicast is performed as described in the description, and the base station 700 and the terminal (for example, 1702) perform unicast communication.

[0383] In addition to the multicast transmission beams 1202-1, 1202-2, 1202-3, 1203-1, 1203-2, and 1203-3, the base station 700 also transmits Figure 18 In addition, a transmission beam 1701 for unicast is generated to transmit data to terminal 1702 alone. Figure 18 Although an example is shown in which the base station 700 sends one transmission beam 1701 to the terminal 1702, the number of transmission beams is not limited to one, and the base station 700 can also send multiple transmission beams (or multiple modulated signals) to the terminal 1702.

[0384] Terminal 1702 then generates reception directivity 1703 for directivity control during reception using signal processing unit 405 and / or antennas 401-1 to 401-N and / or multiplication units 603-1 to 603-L and signal processing unit 605. This allows terminal 1702 to receive and demodulate transmit beam 1701.

[0385] 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 combining unit 301) in the illustrated configuration performs precoding (weighted combining).

[0386] Conversely, when terminal 1702 transmits a modulated signal to base station 700, terminal 1702 performs precoding (or weighted synthesis) and transmits transmit beam 1703. Base station 700 then forms receive directivity 1701 for directivity control during reception. This allows base station 700 to receive and demodulate transmit beam 1703.

[0387] Furthermore, transmission beam 1202-1 for transmitting "modulation signal 1" and transmission beam 1203-1 for transmitting "modulation signal 2" are transmitted by base station 700 at the same frequency (same frequency band) and at the same time. Furthermore, transmission beam 1202-2 for transmitting "modulation signal 1" and transmission beam 1203-2 for transmitting "modulation signal 2" are transmitted by base station 700 at the same frequency (same frequency band) and at the same time. Furthermore, transmission beam 1202-3 for transmitting "modulation signal 1" and transmission beam 1203-3 for transmitting "modulation signal 2" are transmitted by base station 700 at the same frequency (same frequency band) and at the same time.

[0388] Furthermore, transmission beams 1202-1, 1202-2, and 1202-3 used to transmit "modulation signal 1" can be beams of the same frequency (same frequency band) or beams of different frequencies (different frequency bands). Transmission beams 1203-1, 1203-2, and 1203-3 used to transmit "modulation signal 2" can be beams of the same frequency (same frequency band) or beams of different frequencies (different frequency bands).

[0389] 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).

[0390] In addition, Figure 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.

[0391] At this time, the structure and Figure 1 、 Figure 3 The operation of the setting unit 158 ​​in will be described.

[0392] 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 18 In the case of the transmission shown, information that “both multicast transmission and unicast transmission are performed” is input to the setting unit 158 ​​through the setting signal 160 .

[0393] Furthermore, the setting signal 160 includes information on the number of transmission streams when performing multicast, and the base station performs Figure 18 In the case of the transmission shown, information that “the number of transmission streams is 2” is input to the setting unit 158 ​​through the setting signal 160 .

[0394] Furthermore, the setting signal 160 may also include information on “how many transmission beams are used to transmit each stream”. Figure 18 In the case of the transmission shown, information that “the number of transmission beams of the transmission stream 1 is 3, and the number of transmission beams of the transmission stream 2 is 3” is input to the setting unit 158 ​​through the setting signal 160 .

[0395] in addition, Figure 1 、 Figure 3 The base station can also transmit data symbols containing control information such as "whether to transmit for multicast or unicast," "the number of transmission streams when performing multicast," and "how many transmission beams are used to transmit each stream." This allows the terminal to perform appropriate reception.

[0396] 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.

[0397] Next, as a modification of the first embodiment, a case where a base station transmits a plurality of multicast data transmissions will be described.

[0398] Figure 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 given the same reference numerals, and detailed descriptions are omitted.

[0399] The base station 700 has multiple antennas and transmits multiple transmission signals from the transmission antenna 701. Figure 1 、 Figure 3 In the illustrated configuration, transmission beamforming (directivity control) is performed by performing precoding (weighted combining) in the signal processing section 102 (and / or the weighted combining section 301).

[0400] Furthermore, regarding the description of the transmission beams 702-1, 702-2, 702-3, 703-1, 703-2, and 703-3, since the same Figure 7 The description is the same as , so it is omitted.

[0401] Furthermore, regarding 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, due to the use of Figure 7 The description is the same as , so it is omitted.

[0402] The base station 700 transmits transmission beams 1901-1, 1901-2, 1902-1, and 1902-2 in addition to the transmission beams 702-1, 702-2, 702-3, 703-1, 703-2, and 703-3.

[0403] 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.

[0404] 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.

[0405] 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 the same as that of terminals 704-1, 704-2, 704-3, 704-4, and 704-5. Figure 7 Same description as .

[0406] Terminal 1903-1 controls the directionality during reception using 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, thereby generating reception directivity 1904-1 and reception directivity 1905-1. Furthermore, reception directivity 1904-1 enables terminal 1903-1 to receive and demodulate transmission beam 1901-2, which is used to transmit data for stream 3. Reception directivity 1905-1 enables terminal 1903-1 to receive and demodulate transmission beam 1902-2, which is used to transmit data for stream 4.

[0407] Terminal 1903-2 controls the directionality during reception using 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, thereby generating reception directivity 1904-2 and reception directivity 1905-2. Reception directivity 1904-2 enables terminal 1903-2 to receive and demodulate transmit beam 1902-1, which is used to transmit data for stream 4. Reception directivity 1905-2 enables terminal 1903-2 to receive and demodulate transmit beam 1901-2, which is used to transmit data for stream 3.

[0408] Terminal 1903-3 controls the directionality during reception using 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, thereby generating reception directivity 1904-3 and reception directivity 1905-3. Furthermore, reception directivity 1904-3 enables terminal 1903-3 to receive and demodulate transmit beam 1901-1, which is used to transmit data for stream 3. Reception directivity 1905-3 enables terminal 1903-3 to receive and demodulate transmit beam 1902-1, which is used to transmit data for stream 4.

[0409] Terminal 1903-4 controls the directionality during reception using 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, thereby generating reception directivity 1904-4 and reception directivity 1905-4. Terminal 1903-4 receives and demodulates transmit beam 703-1, which is used to transmit data for stream 2, using reception directivity 1904-4. Terminal 1903-4 receives and demodulates transmit beam 1901-1, which is used to transmit data for stream 3, using reception directivity 1905-4.

[0410] exist Figure 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.

[0411] Furthermore, transmission beam 702-1 for transmitting data for stream 1 and transmission beam 703-1 for transmitting data for stream 2 are transmitted by base station 700 at the same frequency (same frequency band) and at the same time. Furthermore, transmission beam 702-2 for transmitting data for stream 1 and transmission beam 703-2 for transmitting data for stream 2 are transmitted by base station 700 at the same frequency (same frequency band) and at the same time. Furthermore, transmission beam 702-3 for transmitting data for stream 1 and transmission beam 703-3 for transmitting data for stream 2 are transmitted by base station 700 at the same frequency (same frequency band) and at the same time.

[0412] Transmission beam 1901-1 for transmitting data for stream 3 and transmission beam 1902-1 for transmitting data for stream 4 are transmitted by base station 700 at the same frequency (same frequency band) and at the same time. Furthermore, transmission beam 1901-2 for transmitting data for stream 3 and transmission beam 1902-2 for transmitting data for stream 4 are also transmitted by base station 700 at the same frequency (same frequency band) and at the same time.

[0413] Furthermore, transmission beams 702-1, 702-2, and 702-3 used to transmit data for stream 1 may be beams of the same frequency (same frequency band) or beams of different frequencies (different frequency bands). Transmission beams 703-1, 703-2, and 703-3 used to transmit data for stream 2 may be beams of the same frequency (same frequency band) or beams of different frequencies (different frequency bands).

[0414] Transmission beams 1901-1 and 1901-2 used to transmit data for 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 used to transmit data for stream 4 may be beams of the same frequency (same frequency band) or beams of different frequencies (different frequency bands).

[0415] Moreover, according to Figure 1 Data symbols for stream 1 can be generated based on information #1 101-1, data symbols for stream 2 can be generated, and data symbols for stream 3 and stream 4 can be generated based on information #2 101-2. Furthermore, error correction encoding can be performed on information #1 101-1 and information #2 101-2, respectively, to generate data symbols.

[0416] 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 for 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.

[0417] That is, the data symbols of each stream are based on Figure 1 Therefore, the terminal can selectively obtain the stream for multicast.

[0418] At this time, the structure and Figure 1 、 Figure 3 The operation of the setting unit 158 ​​in the 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. Figure 19 In the case of the transmission shown, information that “transmission for multicast is to be performed” is input to the setting unit 158 ​​through the setting signal 160 .

[0419] The setting signal 160 includes information on the number of transmission streams when performing multicast. Figure 19 In the case of the transmission shown, information that “the number of transmission streams is 4” is input to the setting unit 158 ​​through the setting signal 160 .

[0420] Furthermore, the setting signal 160 may include information on "how many transmission beams are used to transmit each stream". Figure 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.

[0421] in addition, Figure 1 、 Figure 3 The base station can also transmit control information symbols containing information such as "whether to transmit for multicast or unicast," "the number of transmission streams when performing multicast," and "how many transmission beams are used to transmit each stream." This allows the terminal to perform appropriate reception.

[0422] Next, as a modification of the first embodiment, a case where a base station transmits a plurality of multicast data transmissions will be described.

[0423] Figure 20 An example of the communication status between a base station (or access point, etc.) and a terminal is shown. Figure 7 、 Figure 12 、 Figure 19 The same operations are given the same reference numerals and detailed descriptions are omitted.

[0424] The base station 700 has multiple antennas and transmits multiple transmission signals from the transmission antenna 701. Figure 1 、 Figure 3 In the illustrated configuration, transmission beamforming (directivity control) is performed by performing precoding (weighted combining) in the signal processing section 102 (and / or the weighted combining section 301).

[0425] Furthermore, regarding the description of the transmission beams 1202-1, 1202-2, 1202-3, 1203-1, 1203-2, and 1203-3, Figure 12 The description is repeated, so it is omitted.

[0426] Furthermore, regarding the description of terminals 704-1, 704-2, 704-3, 704-4, 704-5, and reception directivities 705-1, 705-2, 705-3, 705-4, 705-5, 706-1, 706-2, 706-3, 706-4, 706-5, Figure 12 The description is repeated, so it is omitted.

[0427] The base station 700 transmits beams 2001-1, 2001-2, 2002-1, and 2002-2 in addition to the transmission beams 1202-1, 1202-2, 1202-3, 1203-1, 1203-2, and 1203-3.

[0428] The transmission beam 2001-1 is a transmission beam for transmitting the "modulation signal 3." Furthermore, the transmission beam 2001-2 is also a transmission beam for transmitting the "modulation signal 3."

[0429] The transmission beam 2002-1 is a transmission beam for transmitting the "modulation signal 4." Furthermore, the transmission beam 2002-2 is also a transmission beam for transmitting the "modulation signal 4."

[0430] 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 operations of terminals 704-1, 704-2, 704-3, 704-4, and 704-5 are the same as those of Figure 7 Same description as .

[0431] Terminal 1903-1 controls the directionality 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, thereby generating reception directivity 1904-1 and reception directivity 1905-1. Furthermore, reception directivity 1904-1 enables terminal 1903-1 to receive and demodulate transmission beam 2001-2, which transmits "modulation signal 3." Reception directivity 1905-1 enables terminal 1903-1 to receive and demodulate transmission beam 2002-2, which transmits "modulation signal 4."

[0432] Terminal 1903-2 controls the directionality 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, thereby forming reception directivity 1904-2 and reception directivity 1905-2. Furthermore, reception directivity 1904-2 enables terminal 1903-2 to receive and demodulate transmission beam 2002-1, which transmits "modulation signal 4." Reception directivity 1905-2 enables terminal 1903-2 to receive and demodulate transmission beam 2001-2, which transmits "modulation signal 3."

[0433] Terminal 1903-3 controls the directionality 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, thereby generating reception directivity 1904-3 and reception directivity 1905-3. Furthermore, reception directivity 1904-3 enables terminal 1903-3 to receive and demodulate transmission beam 2001-1, which transmits "modulation signal 3." Reception directivity 1905-3 enables terminal 1903-3 to receive and demodulate transmission beam 2002-1, which transmits "modulation signal 4."

[0434] Terminal 1903-4 controls the directionality 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, thereby generating reception directivity 1904-4 and reception directivity 1905-4. Furthermore, reception directivity 1904-4 enables terminal 1903-4 to receive and demodulate transmission beam 2001-1, which transmits "modulation signal 3." Reception directivity 1905-4 enables terminal 1903-4 to receive and demodulate transmission beam 2002-1, which transmits "modulation signal 4."

[0435] exist Figure 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.

[0436] Furthermore, base station 700 transmits transmit beam 1202-1, used to transmit "modulation signal 1," and transmit beam 1203-1, used to transmit "modulation signal 2," at the same frequency (same frequency band) and at the same time. Furthermore, base station 700 transmits transmit beam 1202-2, used to transmit "modulation signal 1," and transmit beam 1203-2, used to transmit "modulation signal 2," at the same frequency (same frequency band) and at the same time. Furthermore, base station 700 transmits transmit beam 1202-3, used to transmit "modulation signal 1," and transmit beam 1203-3, used to transmit "modulation signal 2," at the same frequency (same frequency band) and at the same time.

[0437] Base station 700 transmits transmit beam 2001-1 for transmitting "modulation signal 3" and transmit beam 2002-1 for transmitting "modulation signal 4" at the same frequency (same frequency band) and at the same time. Furthermore, base station 700 transmits transmit beam 2001-2 for transmitting "modulation signal 3" and transmit beam 2002-2 for transmitting "modulation signal 4" at the same frequency (same frequency band) and at the same time.

[0438] Furthermore, transmission beams 702-1, 702-2, and 702-3 used to transmit data for stream 1 may be beams of the same frequency (same frequency band) or beams of different frequencies (different frequency bands). Transmission beams 703-1, 703-2, and 703-3 used to transmit data for stream 2 may be beams of the same frequency (same frequency band) or beams of different frequencies (different frequency bands).

[0439] 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).

[0440] At this time, the structure and Figure 1 、 Figure 3 The operation of the setting unit 158 ​​in the 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. Figure 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 .

[0441] The setting signal 160 includes information on the number of modulation signals to be sent when performing multicast. Figure 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 .

[0442] Furthermore, the setting signal 160 may include information on how many transmission beams are used to transmit each modulated signal. Figure 20 In the case of transmission 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.

[0443] in addition, Figure 1 、 Figure 3 The base station can also transmit control information symbols including information such as "whether to transmit for multicast or unicast," "number of transmission streams when performing multicast," and "number of transmission beams used to transmit each stream" in the data symbols. This allows the terminal to perform appropriate reception.

[0444] In addition, Figure 20 In the case of receiving both the transmission beam of "modulation signal 1" and the transmission beam of "modulation signal 2", the terminal can obtain the data of stream 1 and the data of stream 2 with high reception quality.

[0445] 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.

[0446] And, in Figure 20 In the example described above, the base station transmits "modulation signal 1," "modulation signal 2," "modulation signal 3," and "modulation signal 4." However, the base station may also transmit "modulation signal 5" and "modulation signal 6" to transmit data for stream 5 and stream 6, respectively. Furthermore, the base station may transmit more modulation signals to transmit more streams. Furthermore, each modulation signal may be transmitted using one or more transmission beams.

[0447] Moreover, if Figure 17 、 Figure 18 As described in , there may be more than one transmission beam for unicast (or reception directivity control).

[0448] Regarding the relationship between "modulation signal 1" and "modulation signal 2", due to Figure 13 Here, the relationship between "modulation signal 3" and "modulation signal 4" is used. Figure 21 Provide explanation.

[0449] For example, error correction coding and other processing are performed on information #2 101-2 to obtain error-corrected coded data. This error-corrected coded data is named transmit data #2. Furthermore, transmit data #2 is mapped to obtain data symbols, which are then divided into data symbols for stream 3 and stream 4, resulting in data symbols (data symbol groups) for stream 3 and data symbols (data symbol groups) for stream 4. At this point, the data symbols for stream 3 in symbol number i are s3(i), and the data symbols for stream 4 are s4(i). Thus, "modulated signal 3" tx3(i) in symbol number i is represented, for example, as follows.

[0450] [Formula 5]

[0451] tx3(i)=e(i)×s3(i)+f(i)×s4(i) Formula (5)

[0452] Furthermore, the "modulated signal 4" tx4(i) in symbol number i is expressed as follows, for example.

[0453] [Formula 6]

[0454] tx4(i)=g(i)×s3(i)+h(i)×s4(i) Formula (6)

[0455] In addition, in equations (5) and (6), e(i), f(i), g(i), and h(i) can be defined using complex numbers, and therefore, can also be real numbers.

[0456] Furthermore, although described as e(i), f(i), g(i), and h(i), they do not need to be functions of the symbol number i, but may be fixed values.

[0457] 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 converted from Figure 1 、 Figure 3 In addition, the "modulation signal 4 codeword group" containing the "signal of the data transmission area of ​​the modulation signal 4" composed of data codewords is sent from Figure 1 、 Figure 3 The base station sends it.

[0458] (Replenish)

[0459] Of course, the embodiments and other contents in this specification may be implemented in various combinations.

[0460] In addition, the various embodiments and other contents are merely examples. 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 method, error correction coding method (error correction code used, code length, coding rate, etc.), control information, etc." are applied.

[0461] Regarding modulation schemes, the embodiments and other contents described in this specification can be implemented even when using modulation schemes other than those described in this specification. For example, APSK (Amplitude Phase Shift Keying), PAM (Pulse Amplitude Modulation), PSK (Phase Shift Keying), and QAM (Quadrature Amplitude Modulation) can also be applied. Each modulation scheme can also employ uniform or non-uniform mapping. For example, APSK includes 16APSK, 64APSK, 128APSK, 256APSK, 1024APSK, and 4096APSK; for example, PAM includes 4PAM, 8PAM, 16PAM, 64PAM, 128PAM, 256PAM, 1024PAM, and 4096PAM; for example, PSK includes BPSK, QPSK, 8PSK, 16PSK, 64PSK, 128PSK, 256PSK, 1024PSK, and 4096PSK; and for example, QAM includes 4QAM, 8QAM, 16QAM, 64QAM, 128QAM, 256QAM, 1024QAM, and 4096QAM.

[0462] 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 a signal point configuration method affected by the modulation method shown in this specification.

[0463] The "base station" described in this specification may be, for example, a broadcast station, base station, access point, terminal, mobile phone, etc. Furthermore, the "terminal" described in this specification may be a television, radio, terminal, personal computer, mobile phone, access point, base station, etc. Furthermore, the "base station" and "terminal" in this disclosure are devices with communication capabilities that are configured to connect to a device used to execute applications, such as a television, radio, personal computer, mobile phone, etc., via some interface. Furthermore, in this embodiment, symbols other than data symbols, such as pilot symbols and symbols for control information, may be arranged in any manner within a frame.

[0464] Furthermore, pilot symbols and control information symbols can be named in any manner. For example, in a transceiver, any known symbol modulated using PSK modulation will suffice. Alternatively, the symbol can be synchronized with the receiver, allowing the receiver to know the symbols sent by the transmitter. The receiver uses these symbols for frequency synchronization, time synchronization, channel estimation (CSI (Channel State Information) estimation) of each modulated signal, and signal detection. Pilot symbols are also sometimes referred to as preambles, unique words, postambles, or reference symbols.

[0465] Furthermore, the code elements used for control information are code elements used to transmit information other than data (data of applications, etc.) that needs to be transmitted to the communication party (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.).

[0466] Furthermore, the present disclosure is not limited to the embodiments and can be implemented with various modifications. For example, in each embodiment, although the embodiments are described as being implemented as a communication device, the present disclosure is not limited to this and the communication method can also be implemented as software.

[0467] Alternatively, for example, a program for executing the above-mentioned communication method may be stored in advance in a ROM (Read Only Memory), and the program may be operated by a CPU (Central Processor Unit).

[0468] 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.

[0469] Furthermore, each structure of each embodiment described above can typically be implemented as an LSI (Large Scale Integration) which is an integrated circuit having input 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 a single chip. Although LSI is used here, it is also called IC (Integrated Circuit), system LSI, super LSI, and ultra-large-scale LSI depending on the degree of integration. Furthermore, the method of integrated circuitization is not limited to LSI and can also be implemented by a dedicated circuit or a general-purpose processor. FPGA (Field Programmable Gate Array) that can be programmed after LSI manufacturing, or a reconfigurable processor that can reconfigure the connections and settings of circuit cells within the LSI can also be used. Furthermore, if an integrated circuit technology that replaces LSI emerges due to advances in semiconductor technology or other derived technologies, then of course, this technology can also be used to integrate functional blocks. There are also possibilities for applications in biotechnology.

[0470] (Implementation 3)

[0471] In this embodiment, a multicast communication method in which beamforming different from that in Embodiments 1 and 2 is applied will be described.

[0472] Regarding the structure of the base station, since it is different from the structure of the base station using 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 perform the same actions as Implementation 1 is omitted.

[0473] An example of operations of the base station and the terminal in this embodiment will be described below.

[0474] Figure 22 The diagram shows a case where a base station transmits a multicast transmission stream to one terminal.

[0475] exist Figure 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)" to the terminal 2202-1 from the transmission antenna. 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".

[0476] Figure 23 Explained in order to Figure 22 The communication status between the base station and the terminal is shown as "a sequence for communication between the base station and the terminal".

[0477] [23-1] The terminal first makes a "request for multicast transmission of stream 1" to the base station.

[0478] [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 directionality control and training symbols for reception directionality control in order to perform multicast transmission of stream 1 to the terminal.

[0479] [23-3] The terminal 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 can perform transmission directivity control and the terminal can perform reception directivity control.

[0480] [23-4] The base station determines the method of transmission directivity control (determination of weighting coefficients used in directivity control, etc.) based on the feedback information sent by the terminal, performs transmission directivity control, and transmits data symbols of stream 1.

[0481] [23-5] The terminal determines a reception directivity control method (determination of weighting coefficients used when performing directivity control, etc.) and starts receiving data symbols of stream 1 transmitted by the base station.

[0482] in addition, Figure 23 The "order of communication between base stations and terminals" is an example, and the order of sending each information is not affected by Figure 23 Even if the order of sending each message is changed, the same implementation can be achieved. Figure 23 Although the example of the terminal performing the reception directivity control is used in the description, the terminal may not perform the reception directivity control. Figure 23 In this case, the base station may not transmit the training symbols for reception directivity control, and the terminal may not determine the reception directivity control method.

[0483] Furthermore, when the base station performs transmission directivity control, the base station is Figure 1 In the case of a structure such as setting Figure 2The 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, a weighted coefficient is set in the weighted synthesis unit 301. In addition, the number of streams sent is Figure 22 In the case of , it is "1", but it is not limited thereto.

[0484] Furthermore, when the terminal performs receiving directivity control, the terminal is Figure 4 In the case of a structure such as 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.

[0485] Figure 24 is shown on the timeline Figure 23 An example of a symbol sent by the base station and a symbol sent by the terminal when the base station sends a directivity control symbol and receives a directivity control symbol and a data symbol. Figure 24 (a) in FIG. 1 is a diagram showing an example of a codeword transmitted by a base station on a time axis. Figure 24 (b) is a diagram showing an example of codewords transmitted by the terminal on the time axis, and the horizontal axis represents time.

[0486] like Figure 23 As shown, when the base station and the terminal communicate, as shown in Figure 24 As shown, first, the base station transmits a "base station transmits a directivity control training symbol" 2401. For example, the "base station transmits a directivity control training symbol" 2401 is composed of a control information symbol and a known PSK symbol.

[0487] In addition, the terminal receives the "base station sends directivity control training codeword" 2401 sent by the base station, and for example sends the information of the antenna used by the base station in transmission and the information related to the multiplication coefficient (or weighting coefficient) used in directivity control as feedback information codeword 2402.

[0488] The base station receives "feedback information symbol" 2402 sent by the terminal. Based on feedback information symbol 2402, it determines the antenna to use for transmission and the coefficients to use for transmit directivity control based on feedback information symbol 2402. Subsequently, the base station transmits "terminal reception directivity control training symbol" 2403. For example, "terminal reception directivity control training symbol" 2403 consists of a control information symbol and a known PSK symbol.

[0489] The terminal then receives the "terminal reception directivity control training symbol" 2403 sent by the base station, which determines, for example, the antenna used by the terminal for reception and the multiplication coefficient used by the terminal for reception directivity control. The terminal then transmits the completion of data symbol preparation as a feedback information symbol 2404.

[0490] In addition, the base station receives the “feedback information codeword” 2404 sent by the terminal, and outputs a data codeword 2405 based on the feedback information codeword 2404 .

[0491] in addition, Figure 24 The communication between a base station and a terminal is used as an example. The order of symbol transmission, and the order of base station transmission and terminal transmission, are not limited to this. Furthermore, each of "base station transmits directivity control training symbol" 2401, "feedback information symbol" 2402, "terminal receive directivity control training symbol" 2403, "feedback information symbol" 2404, and "data symbol" 2405 may include preamble signals used for signal detection, time synchronization, frequency synchronization, frequency offset estimation, and channel estimation, reference symbols, pilot symbols, and symbols used to transmit control information.

[0492] Figure 25 yes Figure 23 An example of symbols transmitted by the base station when the base station transmits data symbols of stream 1 after the communication between the base station and the terminal is completed. The horizontal axis represents time.

[0493] exist Figure 25 In the example, the base station transmits the first data symbol of transmission beam 1 of stream 1 as "(for multicast) stream 1-1 data symbol (1)" 2501-1-1. Then, an interval 2502-1 in which data symbols can be transmitted is allocated.

[0494] The base station then transmits the second data symbol of transmission beam 1 of (multicast) stream 1 as "(multicast) stream 1-1 data symbol (2)" 2501-1-2. The base station then allocates a period 2502-2 in which data symbols can be transmitted.

[0495] 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.

[0496] In this way, the base station will Figure 22 The data symbol of "(for multicast) stream 1-1" 2201-1 is transmitted. Figure 25Among them, "(for multicast) stream 1-1 data codeword (1)" 2501-1-1, "(for multicast) stream 1-1 data codeword (2)" 2501-1-2, "(for multicast) data codeword 1-1 data codeword (3)" 2501-1-3, ..., in addition to the data codewords, it can also include pre-synchronization signals, reference codewords, pilot codewords for signal detection, time synchronization, frequency synchronization, frequency offset estimation, channel estimation, and codewords for transmitting control information.

[0497] In addition, Figure 25 In the example, the interval 2502-1 in which data symbols can be transmitted includes a unicast transmission interval 2503-1, and the interval 2502-2 in which data symbols can be transmitted includes a unicast transmission interval 2503-2.

[0498] exist Figure 25 In the frame, the unicast transmission intervals 2503-1 and 2503-2 are included. Figure 25 In the example, the base station may also transmit multicast symbols in the unicast transmission interval 2503-1 excluding the data symbol transmission interval 2502-1 and in the unicast transmission interval 2503-2 excluding the data symbol transmission possible interval 2502-2. This will be explained later using an example.

[0499] 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 an example. Figure 25 The time positions shown can be arbitrarily arranged in time. In addition, in the unicast transmission interval, either the base station or the terminal can transmit the codeword.

[0500] Alternatively, the base station may directly set the unicast transmission interval. Alternatively, as another method, the base station may set the maximum transmission data transfer rate for transmitting symbols for multicast.

[0501] For example, if the data transmission rate that the base station can transmit is 2 Gbps (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.

[0502] 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.

[0503] In addition, with Figure 22 state, in Figure 25, the frame structure includes "(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. However, the present invention is not limited to this. For example, data symbols for a multicast stream other than stream 1 (stream 1-1) may exist, or data symbols for stream 1-2, which is the second transmission beam of stream 1, and data symbols for stream 1-3, which is the third transmission beam of stream 1, may exist. This will be described later.

[0504] Figure 26 Shows relative to Figure 22 The state of the base station sending a multicast stream to one terminal, the state when a new terminal is added, Figure 22 The same actions are given the same labels.

[0505] exist Figure 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".

[0506] Then, Figure 26 Provide explanation.

[0507] In the following description, relative to Figure 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. Figure 27 The base station shown in FIG. 1 sends “terminal reception directivity control training code element” 2701 and “data code element” 2702, but does not send Figure 24 The base station sends training symbols. Figure 27 , the horizontal axis is time.

[0508] Figure 28 Shows that in order to become Figure 26 As shown, this is an example of an operation performed in a state where the base station transmits a transmission beam for multicast to two terminals.

[0509] [28-1] Terminal 2202-2 sends a "request for multicast transmission of stream 1" to the base station. Figure 25 It is sent in the unicast sending interval in .

[0510] [28-2] The base station receives [28-1] and notifies the terminal 2202-2 that "stream 1 for multicast is transmitted". Figure 25 Sent during the unicast sending interval.

[0511] [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 also performs reception directivity control to notify the base station that it can receive the multicast stream 1.

[0512] [28-4] The base station accepts [28-3] and confirms that the terminal can receive "stream 1 for multicast".

[0513] [28-5] The terminal 2202-2 performs reception directivity control and starts receiving "stream 1 for multicast".

[0514] Figure 29 Shows relative to Figure 22 The state of the base station sending multicast stream to a terminal, the state when a new terminal is added, Figure 22 The same actions are given the same labels.

[0515] exist Figure 29 The newly added terminal is 2202-2. Figure 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".

[0516] Next, for Figure 29 The control performed in the state shown is explained.

[0517] In the following description, Figure 29 In the middle, 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.

[0518] Figure 30 Shows that in order to become Figure 29 As shown, this is an example of an operation performed in a state where the base station transmits a transmission beam for multicast to two terminals.

[0519] [30-1] Terminal 2202-2 sends a "request for multicast transmission of stream 1" to the base station. Figure 25 The unicast sending interval in is sent.

[0520] [30-2] The base station receives [30-1] and notifies the terminal 2202-2 that "stream 1 for multicast is transmitted". Figure 25 The unicast transmission interval in is sent.

[0521] [30-3] The terminal 2202-2 receives [30-2] and notifies the base station that "the multicast stream 1 is not received". Figure 25 The unicast transmission interval in is sent.

[0522] [30-4] The base station receives [30-3] and decides to use another transmission beam (i.e. Figure 29 Here, it is determined that the other transmission beam of multicast stream 1 is to be transmitted. However, it may be determined that the other transmission beam of multicast stream 1 is not to be transmitted. This will be described later.

[0523] 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. Figure 29 The transmit beam of stream 1-1 in the .This will be explained later.

[0524] [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.

[0525] [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 terminal 2202-2, and transmits the data codewords of stream 1 ( Figure 29 The transmit beam 2201-2 of stream 1-2 is sent.

[0526] [30-7] Terminal 2202-2 determines the reception directivity control method (determination of the weighting coefficient used when performing directivity control, etc.), and starts to transmit the data codeword of stream 1 ( Figure 29 The reception of the transmitted beam 2201-2 of stream 1-2).

[0527] in addition, Figure 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 Figure 30 Therefore, even if the order of sending each message is changed, the same execution can be performed.

[0528] In addition, Figure 30 In the example, the case where the terminal performs the reception directivity control is described, but it is also possible that the terminal does not perform the reception directivity control. Figure 30In this case, the base station may not transmit the training symbols for reception directivity control, and the terminal may not determine the reception directivity control method.

[0529] Furthermore, when the base station performs transmission directivity control, the structure of the base station is Figure 1 In the case of a structure such as 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 sent is Figure 29 In the case of , it is "2", but it is not limited thereto.

[0530] Furthermore, when terminals 2202-1 and 2202-2 perform reception directivity control, the terminal structure is Figure 4 In the case of a structure such as setting 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.

[0531] Figure 31 Shown Figure 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.

[0532] exist Figure 31 In, due to the existence Figure 29 The "flow 1-1" is therefore Figure 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). The reason why they are written as "(M), (M+1), (M+2)" is because (Multicast) Stream 1-1 existed before (Multicast) Stream 1-2 existed. Therefore, in Figure 31 In the example, M is an integer greater than or equal to 2.

[0533] And, as Figure 31 As shown, in the intervals 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.

[0534] As described so far, it has the following features.

[0535] ·“(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”.

[0536] 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."

[0537] ·The directionality of the transmission beam 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 directionality of the transmission beam 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. 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.

[0538] As described above, two terminals can receive the multicast stream transmitted by the base station. Because directionality control is performed during transmission and reception, the area receiving the multicast stream can be expanded. Furthermore, since streams and transmit beams are added only when needed, the frequency, time, and spatial resources used for data transmission can be efficiently utilized.

[0539] In addition, there are cases where control is performed as will be described later. The details of the control are as follows.

[0540] Figure 32 is with Figure 31 Different Figure 30 Example of a codeword sent by the base station when the base station sends a data codeword (of stream 1) after the communication between the base station and the terminal is completed. The horizontal axis is set to time. Figure 32 In the Figure 25 、 Figure 31 The same action is given the same label.

[0541] exist Figure 32 In, with Figure 31 The difference is that since the unicast transmission intervals 2503-1 and 2503-2 are set to be longer in terms of time, the base station adds further multicast symbols without transmitting them.

[0542] Figure 33 Shows the Figure 29 The base station shown in FIG. 2 transmits a multicast transmission beam to two terminals (terminals 2202-1 and 2202-2), and a new terminal 2202-3 requests the base station to add a transmission beam. Figure 32 Frames of modulated signals transmitted by a base station are shown.

[0543] [33-1] Terminal 2202-3 makes a "request for multicast transmission of stream 1" to the base station. In addition, the "request for multicast transmission of stream 1" is Figure 32 The unicast transmission interval in is sent.

[0544] [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". Figure 32 The unicast transmission interval in is sent.

[0545] [33-3] The terminal 2202-3 receives [33-2] and notifies the base station that "the multicast stream 1 has not been received". Figure 32 The unicast transmission interval in is sent.

[0546] [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. Figure 32 In the frame shown in FIG. 1 , the base station determines that it will not transmit the other transmission beams for multicast stream 1. Therefore, the base station notifies the terminal 2202-3 that it will not transmit the other transmission beams for multicast stream 1. In addition, the notification of not transmitting the other transmission beams for multicast stream 1 is in the Figure 32The unicast transmission interval in is sent.

[0547] [33-5] The terminal 2202-3 receives the "notification of not transmitting another transmission beam for multicast stream 1".

[0548] in addition, Figure 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 Figure 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.

[0549] Figure 34 Shows the Figure 29 The base station shown in FIG2 sends 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). Figure 31 The status shown.

[0550] [34-1] Terminal 2202-3 issues a "request for multicast transmission of stream 2" to the base station. Figure 31 The unicast transmission interval 2503 in is sent.

[0551] [34-2] The base station receives [34-1] and notifies the terminal 2202-3 that "the transmission of stream 2 for multicast will not be performed". In addition, the base station determines whether it is possible to add a transmission beam for stream 2 for multicast and transmit it. Figure 31 The frame state shown in FIG2 notifies the terminal 2202-3 that "the transmission of the transmission beam of the multicast stream 2 is supported". In addition, "notification of not transmitting the multicast stream 2" and "notification of enabling the transmission of the transmission beam of the multicast stream 2" are shown in FIG2. Figure 31 The unicast transmission interval 2503 in is sent.

[0552] [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". Figure 31 The unicast transmission interval 2503 in is sent.

[0553] [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 training symbols for transmission directivity control and training symbols for reception directivity control. In addition to transmitting these symbols, the base station also transmits Figure 31 The transmission beams of stream 1-1 and stream 1-2 are shown. This will be described later.

[0554] [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.

[0555] [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 terminal 2202-3, and transmits the data codewords of stream 2.

[0556] [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 transmitted by the base station.

[0557] in addition, Figure 34 The "order of communication between base stations and terminals" is an example, and the order of sending each information is not affected by Figure 34 Even if the order of sending each message is replaced, the same execution can be performed. Figure 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. Figure 34 In the present embodiment, the base station may not transmit the training symbols for reception directivity control, and the terminal may not determine the reception directivity control method.

[0558] Furthermore, when the base station performs transmission directivity control, Figure 1 In the case of a structure such as setting Figure 2 The multiplication coefficients in the multiplication units 204-1, 204-2, 204-3, and 204-4.

[0559] 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.

[0560] Figure 35 Shown in Figure 34An example of the codewords sent by the base station when the base station sends the data codewords of stream 1 and stream 2 after the communication between the base station and the terminal is completed. The horizontal axis is time.

[0561] exist Figure 35 In, due to the existence Figure 31 As shown in "stream 1-1" and "stream 1-2," 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). Furthermore, there are "(multicast) stream 1-2 data symbol (N)" 3101-N, "(multicast) stream 1-2 data symbol (N+1)" 3101-(N+1), and "(multicast) stream 1-2 data symbol (N+2)" 3101-(N+2). Note that N and M are integers greater than 2.

[0562] So, if Figure 35 As shown, in the intervals 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.

[0563] As described so far, this method has the following advantages.

[0564] ·“(Multicast) Stream 1-1 Data Symbol (M)” 2501-1-M, “(Multicast) Stream 1-1 Data Symbol (M+1)” 2501-1-(M+1), “(Multicast) Stream 1-1 Data Symbol (M+2)” 2501-1-(M+2), “(Multicast) Stream 1-2 Data Symbol (N)” 3101-N, “(Multicast) Stream 1-2 Data Symbol (N+1)” 3101-(N+1), and “(Multicast) Stream 1-2 Data Symbol (N+2)” 3101-(N+2) are all data symbols used to transmit “Stream 1”.

[0565] The terminal obtains "stream 1 data" by obtaining "stream 1-1 data symbols." Furthermore, the terminal obtains "stream 1 data" by obtaining "stream 1-2 data symbols."

[0566] ·The directionality of the transmission beam 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 directionality of the transmission beam 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.

[0567] 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.

[0568] "(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".

[0569] The terminal obtains the data symbol for "stream 2-1" and thereby obtains the data for "stream 2." As described above, the terminal can receive multiple multicast streams (stream 1 and stream 2) transmitted by the base station. Directivity control is performed during transmission and reception, thereby expanding the area over which the multicast streams can be received. Furthermore, since additional streams and transmit beams are only added when necessary, the frequency, time, and spatial resources used for data transmission can be efficiently utilized.

[0570] In addition, the control described later can also be performed. The details of the control are as follows.

[0571] Figure 32 is with Figure 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. Figure 32 In the Figure 25 and Figure 31 The same actions are given the same labels.

[0572] exist Figure 32 In, with Figure 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, for example, it does not need to add and transmit symbols of a new stream.

[0573] Figure 36 Shows the Figure 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 requests the base station to add a transmission beam for another multicast stream (stream 2). Figure 32 Shows a frame of a modulated signal transmitted by a base station.

[0574] [36-1] Terminal 2202-3 sends a "request for multicast transmission of stream 2" to the base station. Figure 32 The unicast transmission interval in is sent.

[0575] [36-2] The base station receives [36-1] and notifies the terminal 2202-3 that "the multicast stream 2 is not being transmitted". Figure 32 The unicast transmission interval in is transmitted. And the base station determines whether it can transmit the transmission beam of multicast flow 2. The base station considers Figure 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". Figure 32 The unicast transmission interval in is sent.

[0576] [36-3] The terminal 2202-3 receives the "notification of not transmitting the transmission beam of the multicast stream 2".

[0577] in addition, Figure 36 The order of communication between the base station and the terminal is an example, and the order of sending each information is not affected by Figure 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 streams or multicast transmission beams.

[0578] In addition, Figure 35 The setting method of the unicast transmission intervals 2503-1 and 2503-2 shown in the following is supplementally explained.

[0579] For example, in Figure 35In the example, the maximum number of transmission beams for multicast is determined or set in advance.

[0580] Then, upon receiving a request 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. Figure 35 In the case of , the number of transmission beams for multicast is 3. Therefore, the base station transmits a plurality of transmission beams for multicast, but sets the idle time after the transmission as the unicast transmission interval.

[0581] As described above, the unicast transmission interval may also be set.

[0582] (Supplement 1)

[0583] In Supplement 1, a case where a base station performs unicast communication, that is, individual communication, with a plurality of terminals is described.

[0584] At this time, for example Figure 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. These may be control information that a base station broadcasts to multiple terminals for data communication with the terminals. For example, control information refers to control information required for data communication between the base station and the terminals.

[0585] And, for example Figure 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 may be a common search space. A common search space refers to control information used for cell control. It is control information broadcast to multiple terminals.

[0586] Likewise, for example Figure 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.

[0587] In addition, for example Figure 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.

[0588] In addition, about Figure 9The characteristics of 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, 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 are the same as those described in the above-described embodiment.

[0589] For example, Figure 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.

[0590] In addition, for example Figure 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 common search spaces.

[0591] For example, Figure 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.

[0592] In addition, for example Figure 14 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 can also be a common search space.

[0593] in addition, Figure 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 are as described in the above-described embodiment. Figure 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.

[0594] For example, Figure 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 that the base station broadcasts to multiple terminals in order to communicate data with the multiple terminals.

[0595] and, Figure 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 common search spaces.

[0596] in addition, Figure 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 are as described in the above-described embodiment.

[0597] For example, Figure 31 、 Figure 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.

[0598] and, Figure 31 、 Figure 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.

[0599] in addition, Figure 31 、 Figure 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 are as described in the above-described embodiment.

[0600] For example, in Figure 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 be broadcast channels, that is, they can be control information broadcasted by the base station to multiple terminals in order to communicate data with multiple terminals.

[0601] And, in Figure 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.

[0602] For example, Figure 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.

[0603] and, Figure 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 common search spaces.

[0604] In addition, Figure 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. Figure 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 are as described in the above-described embodiment.

[0605] exist Figure 9 、 Figure 14 、 Figure 25 、 Figure 31 、 Figure 32 、 Figure 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 Figure 9 、 Figure 14 、 Figure 25 、 Figure 31 、 Figure 32 、 Figure 35 limited.

[0606] In addition, Figure 25 、 Figure 31 、 Figure 32 、 Figure 35 In the description, the horizontal axis is time, but the same implementation is possible even if the horizontal axis is frequency (carrier). In addition, when the horizontal axis is frequency (carrier), the base station uses one or more carriers or subcarriers to transmit each data symbol.

[0607] (Supplement 2)

[0608] In Supplement 2, a case where a base station and multiple terminals perform unicast communication, that is, individual communication, is described.

[0609] At this time, for example Figure 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 may be data destined for the base station or for one of multiple communicating terminals. In this case, the data may also include control information.

[0610] in addition, Figure 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.

[0611] For example, Figure 14 Symbol group #1 1401-1 of modulation signal 1, symbol group #2 1401-2 of modulation signal 1, symbol group #3 1401-3 of modulation signal 1, symbol group #1 1401-3 of modulation signal 2, symbol group #2 1402-2 of modulation signal 2, and symbol group #3 1402-3 of modulation signal 2 may be data destined for the base station or for one of multiple communicating terminals. In this case, the data may also include control information.

[0612] in addition, Figure 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.

[0613] For example, Figure 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 be data destined for the base station or for one of the multiple communicating terminals. In this case, the data may also include control information.

[0614] in addition, Figure 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 are as described in the above-described embodiment.

[0615] For example, Figure 31 、 Figure 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 are data destined for the base station or for one of the multiple communicating terminals. In this case, the data may also include control information.

[0616] in addition, Figure 31 、 Figure 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.

[0617] For example, in Figure 35In this 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 for one of multiple communicating terminals. In this case, the data may also include control information.

[0618] For example, Figure 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 data destined for the base station or for one of the multiple communicating terminals. In this case, the data may also include control information.

[0619] In addition, Figure 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.

[0620] exist Figure 9 、 Figure 14 、 Figure 25 、 Figure 31 、 Figure 32 、 Figure 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 Figure 9 、 Figure 14 、 Figure 25 、 Figure 31 、 Figure 32 、 Figure 35 limited.

[0621] And, in Figure 25 、 Figure 31 、 Figure 32 、 Figure 35Although the horizontal axis is time, the same implementation is possible even if the horizontal axis is frequency (carrier). In addition, when the horizontal axis is frequency (carrier), the base station uses one or more carriers or subcarriers to transmit each data symbol.

[0622] (Supplement 3)

[0623] The base station can also Figure 9 As in the frame structure of , in the time period in which 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, transmission beam of symbol group #2 901-2 of stream 1, transmission beam of symbol group #3 901-3 of stream 1, transmission beam of symbol group #1 902-1 of stream 2, transmission beam of symbol group #2 902-2 of stream 2, and transmission beam of symbol group #3 902-3 of stream 2."

[0624] 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".

[0625] In addition, the base station can also Figure 14 As in the frame structure of the modulation signal 1, in the time period when 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 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 transmitted, the base station uses a transmission beam different from the "transmission beam of the #1 symbol group 1401-1 of the modulation signal 1, the transmission beam of the #2 symbol group 1401-2 of the modulation signal 1, the transmission beam of the #3 symbol group 1401-3 of the modulation signal 1, the transmission beam of the #1 symbol group 1402-1 of the modulation signal 2, the transmission beam of the #2 symbol group 1402-2 of the modulation signal 2, and the transmission beam of the #3 symbol group 1402-3 of the modulation signal 2" to transmit other symbol groups.

[0626] At this time, the "other codeword group" can be a codeword group containing data codewords destined for a certain terminal, a codeword group containing control information codewords as described in other parts of this disclosure, or a codeword group containing other data codewords for multicast.

[0627] 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".

[0628] (Supplement 4)

[0629] The base station can also Figure 25 As in the frame structure of , in the time period in which 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 are transmitted, other symbol groups are transmitted using a transmission beam different from the "transmission beam in which 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 are transmitted."

[0630] In addition, Figure 25 In the case where the horizontal axis represents 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 (1) 2501-1-1, stream 1-1 data symbol (2) 2501-1-2, and stream 1-1 data symbol (3) 2501-1-3" during the time period in which 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 are transmitted.

[0631] Furthermore, the base station can also Figure 31 、 Figure 32 As in the frame structure of the frame, in the time period when stream 1-1 data codeword (M) 2501-1-M, stream 1-1 data codeword (M+1) 2501-1-(M+1), and stream 1-1 data codeword (M+2) 2501-1-(M+2) are transmitted, the base station uses a transmission beam different from the "transmission beam for transmitting stream 1-1 data codeword (M) 2501-1-M, stream 1-1 data codeword (M+1) 2501-1-(M+1), and stream 1-1 data codeword (M+2) 2501-1-(M+2)" to transmit other codeword groups.

[0632] In addition, Figure 31 、 Figure 32In the case where the horizontal axis represents 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) 2501-1-(M+1), and stream 1-1 data symbol (M+2) 2501-1-(M+2)" during 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 transmitted.

[0633] Furthermore, the base station can also Figure 31 、 Figure 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.

[0634] In addition, Figure 31 、 Figure 32 In the case where the horizontal axis represents frequency, the base station may also transmit other symbol groups using 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" 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.

[0635] The base station can also Figure 35 As in the frame structure of the frame, in the time period when stream 1-1 data codeword (M) 2501-1-M, stream 1-1 data codeword (M+1) 2501-(M+1), and stream 1-1 data codeword (M+2) 2501-(M+2) are transmitted, the base station uses a transmission beam different from the "transmission beam for transmitting stream 1-1 data codeword (M) 2501-1-M, stream 1-1 data codeword (M+1) 2501-(M+1), and stream 1-1 data codeword (M+2) 2501-(M+2)" to transmit other codeword groups.

[0636] In addition, Figure 35In the case where the horizontal axis represents 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 in which 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 transmitted.

[0637] In addition, the base station can also Figure 35 As in the frame structure of the frame, 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.

[0638] In addition, Figure 35 In the case where the horizontal axis represents 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)" during the time period in which 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.

[0639] Furthermore, the base station can also Figure 35 As in the frame structure of , 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.

[0640] In addition, Figure 35In the case where the horizontal axis represents frequency, the base station may also transmit other symbol groups using 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" during 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.

[0641] In the above description, "other codeword groups" can be codeword groups including data codewords destined for a certain terminal, or as described in other parts of this specification, can be codeword groups including control information codewords, or can be codeword groups including other data codewords for multicast.

[0642] at this time, Figure 1 The base station can also generate a transmission beam for the above-mentioned "other symbol group" through signal processing of the signal processing unit 102. Figure 1 The base station may also generate a transmission beam for the above-mentioned “other symbol group” by selecting antennas from antenna unit 106-1 to antenna unit 106-M.

[0643] 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".

[0644] Also, you can set Figure 25 、 Figure 31 、 Figure 32 The unicast transmission intervals 2503-1 and 2503-2 are shown in the figure.

[0645] (Supplement 5)

[0646] In About Figure 31 、 Figure 32 The following description is made in the description.

[0647] ·“(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”.

[0648] 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."

[0649] And, in regard to Figure 35 The following description is made in the description.

[0650] ·“(For multicast) stream 1-1 data codeword (M)” 2501-1-M, “(For multicast) stream 1-1 data codeword (M+1)” 2501-1-(M+1), “(For multicast) stream 1-1 data codeword (M+2)” 2501-1-(M+2), “(For multicast) stream 1-2 data codeword (N)” 3101-N, “(For multicast) stream 1-2 data codeword (N+1)” 3101-(N+1), and “(For multicast) stream 1-2 data codeword (N+2)” 3101-(N+2) are all data codewords used to transmit “stream 1”.

[0651] 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."

[0652] The following is a supplementary explanation of the above.

[0653] For example, in Figure 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>.

[0654] <Method 1-1>

[0655] Stream 1-1 data symbol (M) 2501-1-M and stream 1-2 data symbol (N) 3101-N contain the same data.

[0656] 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.

[0657] 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.

[0658] <Method 1-2>

[0659] There is a stream 1-2 data symbol (L) 3101-L containing the same data as that contained in the stream 1-1 data symbol (K) 2501-1-K. Note that K and L are integers.

[0660] <Method 2-1>

[0661] Stream 1-1 data symbol (M) 2501-1-M and stream 1-2 data symbol (N) 3101-N contain some of the same data.

[0662] Furthermore, stream 1-1 data symbol (M+1) 2501-1-(M+1) and stream 1-2 data symbol (N+1) 3101-(N+1) include some of the same data.

[0663] Stream 1-1 data symbol (M+2) 2501-1-(M+2) and stream 1-2 data symbol (N+2) 3101-(N+2) contain a portion of the same data.

[0664] <Method 2-2>

[0665] 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. Note that K and L are integers.

[0666] 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 during the first period, and transmits the packets contained in the second packet group using the second transmitting beam different from the first transmitting beam during the second period, and the first period and the second period do not overlap with each other.

[0667] Here, the second packet group may include a second packet containing the same data as the data contained in the first packet included in the first packet group. Furthermore, as a different structure from the above, the second packet group may include a third packet containing the same data as part of the data contained in the first packet included in the first packet group.

[0668] 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.

[0669] 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 during 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.

[0670] 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.

[0671] In addition, in addition to the structure of the first base station or the first transmission system, the third base station or the third transmission system also generates a third packet group containing data of the first stream, and transmits the packets contained 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.

[0672] Here, the third base station or the third transmitting system may repeatedly set the first period, the second period and the third period, or at least a part of a third period of the repeatedly set third period may overlap with the first period, or at least one of the third periods of the repeatedly set third period may not overlap with the first period.

[0673] In addition, in addition to the structure of the first base station or the first transmitting system, the fourth base station or the fourth transmitting system also 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.

[0674] In addition, although the above description states 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.

[0675] 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.

[0676] In addition, although the above is described as "flow", as described elsewhere in this specification, Figure 31 、 Figure 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 Figure 35The "stream 1-1 data codeword (M) 2501-1-M, and stream 1-1 data codeword (M+1) 2501-1-(M+1), stream 1-1 data codeword (M+2) 2501-1-(M+2), and stream 1-2 data codeword (N) 3101-N, and stream 1-2 data codeword (N+1) 3101-(N+1), and stream 1-2 data codeword (N+2) 3101-(N+2)" can be a codeword containing data codewords destined for a certain terminal, a codeword containing control information codewords, or a codeword containing data codewords for multicast.

[0677] (Implementation 4)

[0678] In this embodiment, a specific example of the communication system described in Embodiments 1 to 3 will be described.

[0679] The communication system in this embodiment is composed of (multiple) base stations and multiple terminals. Figure 7 、 Figure 12 、 Figure 17 、 Figure 19 、 Figure 20 、 Figure 26 、 Figure 29 A communication system consisting of a base station 700 and terminals 704-1, 704-2, etc.

[0680] Figure 37 An example of the structure of a base station (700) is shown.

[0681] The logical channel generation unit 3703 receives data 3701 and control data 3702 as input and outputs a logical channel signal 3704. The logical channel signal 3704 includes, for example, control logical channels such as the BCCH (Broadcast Control Channel), PCCH (Paging Control Channel), CCCH (Common Control Channel), MCCH (Multicast Control Channel), and DCCH (Dedicated Control Channel), and data logical channels such as the DTCH (Dedicated Traffic Channel) and MTCH (Multicast Traffic Channel).

[0682] 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."

[0683] The transport channel generation unit 3705 receives the logical channel signal 3704 as input, generates and outputs a transport channel signal 3706. The transport channel signal 3706 is composed of, for example, a BCH (Broadcast Channel), a DL-SCH (Downlink Shared Channel), a PCH (Paging Channel), and an MCH (Multicast Channel).

[0684] In addition, "BCH is a channel for system information reported in the entire area of ​​the cell", "DL-SCH is a channel using user-data, control information and system information", "PCH is a channel for paging information reported in the entire area of ​​the cell", and "MCH is a channel for MBMS services and control reported in the entire area of ​​the cell".

[0685] The physical channel generation unit 3707 receives the transport channel signal 3706 as input and generates and outputs a physical channel signal 3708. The physical channel signal 3708 may include, for example, a PBCH (Physical Broadcast Channel), a PMCH (Physical Multicast Channel), a PDSCH (Physical Downlink Shared Channel), and a PDCCH (Physical Downlink Control Channel).

[0686] 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".

[0687] The modulated signal generating section 3709 receives the physical channel signal 3708 as input, generates and outputs a modulated signal 3710 based on the physical channel signal 3708. The base station 700 then transmits the modulated signal 3710 as a radio wave.

[0688] First, consider a case where a base station performs unicast communication with multiple terminals, that is, communicates individually.

[0689] At this time, for example Figure 9 Symbol group #1 of stream 1 in 901-1, symbol group #2 of stream 1 in 901-2, and symbol group #3 of stream 1 in 901-3 may be broadcast channels (i.e., control information that a base station broadcasts to multiple terminals in order to communicate data with the terminals). Furthermore, control information is, for example, control information required for data communication between the base station and the terminals.

[0690] Here, the broadcast channel is described. Among the physical channels (physical channel signal 3708), "PBCH", "PMCH", and "part of PD-SCH" are broadcast channels.

[0691] Furthermore, in the transport channel (transmission channel signal 3706), "BCH", "part of DL-SCH", "PCH", and "MCH" are broadcast channels.

[0692] Furthermore, in the logical channel (logical channel signal 3704), "BCCH", "CCCH", "MCCH", "part of DTCH", and "MTCH" are broadcast channels.

[0693] Likewise, for example Figure 9 Symbol group #1 of stream 2 in 902-1, symbol group #2 of stream 2 in 902-2, and symbol group #3 of stream 2 in 902-3 are broadcast channels (i.e., control information that a base station broadcasts to multiple terminals in order to communicate data with them). For example, control information is control information required for data communication between the base station and the terminals.

[0694] In addition, in the physical channel (physical channel signal 3708), "PBCH", "PMCH", and "part of PD-SCH" are broadcast channels.

[0695] Furthermore, in the transport channel (transmission channel signal 3706), "BCH", "part of DL-SCH", "PCH", and "MCH" are broadcast channels.

[0696] Furthermore, in the logical channel (logical channel signal 3704), "BCCH", "CCCH", "MCCH", "part of DTCH", and "MTCH" are broadcast channels.

[0697] At this time, about Figure 9 The characteristics of 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 are as described in the above-described embodiment, and, Figure 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.

[0698] In addition, about Figure 9 In some cases, stream 2 may not be transmitted. In particular, when transmitting a broadcast channel signal, the base station may not transmit the symbol group for 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.)

[0699] For example, Figure 14 Symbol group #1 of modulation signal 1 in 1401-1, symbol group #2 of modulation signal 1 in 1401-2, and symbol group #3 of modulation signal 1 in 1401-3 may be broadcast channels (i.e., control information that a base station broadcasts to multiple terminals in order to communicate data with the multiple terminals). Furthermore, control information is, for example, control information required for data communication between the base station and the terminals.

[0700] In addition, "PBCH", "PMCH", and "part of PD-SCH" in the physical channel (physical channel signal 3708) are broadcast channels.

[0701] Furthermore, "BCH", "part of DL-SCH", "PCH", and "MCH" in the transport channel (transmission channel signal 3706) are broadcast channels.

[0702] Furthermore, "BCCH", "CCCH", "MCCH", "part of DTCH", and "MTCH" in the logical channel (logical channel signal 3704) are broadcast channels.

[0703] For example, Figure 14 Symbol group #1 of modulation signal 2 in 1402-1, symbol group #2 of modulation signal 2 in 1402-2, and symbol group #3 of modulation signal 2 in 1402-3 may be broadcast channels (i.e., control information that a base station broadcasts to multiple terminals in order to communicate data with the multiple terminals). Furthermore, control information may be, for example, control information required for data communication between the base station and the terminals.

[0704] In addition, "PBCH", "PMCH", and "part of PD-SCH" in the physical channel (physical channel signal 3708) are broadcast channels.

[0705] Furthermore, "BCH", "part of DL-SCH", "PCH", and "MCH" in the transport channel (transmission channel signal 3706) are broadcast channels.

[0706] Furthermore, "BCCH", "CCCH", "MCCH", "part of DTCH", and "MTCH" in the logical channel (logical channel signal 3704) are broadcast channels.

[0707] In addition, about Figure 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. Figure 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 embodiment described above.

[0708] For example, Figure 25 The data symbol (1) of stream 1-1 in 2501-1-1, the data symbol (2) of stream 1-1 in 2501-1-2, and the data symbol (3) of stream 1-1 in 2501-1-3 may be a broadcast channel (i.e., control information that a base station broadcasts to multiple terminals in order to communicate data with the multiple terminals). Furthermore, the control information is, for example, control information required by the base station and the terminal to achieve data communication.

[0709] In addition, "PBCH", "PMCH", and "part of PD-SCH" in the physical channel (physical channel signal 3708) are broadcast channels.

[0710] Furthermore, "BCH", "part of DL-SCH", "PCH", and "MCH" in the transport channel (transmission channel signal 3706) are broadcast channels.

[0711] Furthermore, "BCCH", "CCCH", "MCCH", "part of DTCH", and "MTCH" in the logical channel (logical channel signal 3704) are broadcast channels.

[0712] In addition, about Figure 25 The characteristics 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.

[0713] For example, Figure 31 、 Figure 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). Furthermore, the control information is, for example, control information required by the base station and the terminal to implement data communication.

[0714] In addition, "PBCH", "PMCH", and "part of PD-SCH" in the physical channel (physical channel signal 3708) are broadcast channels.

[0715] Furthermore, "BCH", "part of DL-SCH", "PCH", and "MCH" in the transport channel (transmission channel signal 3706) are broadcast channels.

[0716] Furthermore, "BCCH", "CCCH", "MCCH", "part of DTCH", and "MTCH" in the logical channel (logical channel signal 3704) are broadcast channels.

[0717] In addition, about Figure 31 、 Figure 32 The characteristics 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 (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 are as described in the embodiment described above.

[0718] For example, in Figure 35 In the example, stream 1-1 data symbol (M) of 2501-1-M, stream 1-1 data symbol (M+1) of 2501-1-(M+1), stream 1-1 data symbol (M+2) of 2501-1-(M+2), stream 1-2 data symbol (N) of 3101-N, stream 1-2 data symbol (N+1) of 3101-(N+1), and stream 1-2 data symbol (N+2) of 3101-(N+2) may be broadcast channels (i.e., control information that a base station broadcasts to multiple terminals in order to communicate data with the multiple terminals). Furthermore, control information is, for example, control information required for data communication between the base station and the terminal.

[0719] In addition, "PBCH", "PMCH", and "part of PD-SCH" in the physical channel (physical channel signal 3708) are broadcast channels.

[0720] Furthermore, "BCH", "part of DL-SCH", "PCH", and "MCH" in the transport channel (transmission channel signal 3706) are broadcast channels.

[0721] Furthermore, "BCCH", "CCCH", "MCCH", "part of DTCH", and "MTCH" in the logical channel (logical channel signal 3704) are broadcast channels.

[0722] For example, Figure 35 Data symbol (1) of stream 2-1 in 3501-1, data symbol (2) of stream 2-1 in 3501-2, and data symbol (3) of stream 2-1 in 3501-3 may be a broadcast channel (i.e., control information that a base station broadcasts to multiple terminals in order to communicate data with the multiple terminals). Furthermore, control information is, for example, control information required by the base station and the terminals to implement data communication.

[0723] In addition, "PBCH", "PMCH", and "part of PD-SCH" in the physical channel (physical channel signal 3708) are broadcast channels.

[0724] Furthermore, "BCH", "part of DL-SCH", "PCH", and "MCH" in the transport channel (transmission channel signal 3706) are broadcast channels.

[0725] Furthermore, "BCCH", "CCCH", "MCCH", "part of DTCH", and "MTCH" in the logical channel (logical channel signal 3704) are broadcast channels.

[0726] In addition, Figure 35Regarding the characteristics 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), as described in the above-described embodiment, Figure 35 The features of stream 2-1 data symbol (1) of 3501-1, stream 2-1 data symbol (2) of 3501-2, and stream 2-1 data symbol (3) of 3501-3 are as described in the above-described embodiment.

[0727] exist Figure 9 、 Figure 14 、 Figure 25 、 Figure 31 、 Figure 32 、 Figure 35 In the transmission of 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 Figure 9 、 Figure 14 、 Figure 25 、 Figure 31 、 Figure 32 、 Figure 35 limited.

[0728] And, in Figure 25 、 Figure 31 、 Figure 32 、 Figure 35 In the description, although the horizontal axis is time, the same implementation is possible even if the horizontal axis is frequency (carrier). In addition, when the horizontal axis is frequency (carrier), the base station transmits each data symbol using one or more carriers or subcarriers.

[0729] In addition, Figure 9 The symbol group of stream 1 may also include data (or symbols) sent to each terminal (data for unicast). Figure 9 The symbol group of stream 2 may also include data (or symbols) to be sent to each terminal (data for unicast).

[0730] exist Figure 14 The symbol group of stream 1 may include data (or symbols) sent to each terminal (data for unicast). Figure 14 The symbol group of stream 2 may include data (or symbols) to be sent to each terminal (data for unicast).

[0731] and, Figure 25 The symbols of stream 1-1 may include data (or symbols) to be transmitted to each terminal (data for unicast). Figure 31 、 Figure 32 The symbols of stream 1-1 and stream 1-2 may include data (or symbols) to be transmitted to each terminal (data for unicast).

[0732] Furthermore, the PBCH may be configured to be used, for example, to transmit the minimum information (system bandwidth, system frame number, number of transmit antennas, etc.) that the UE should read first after performing a cell search.

[0733] For example, PMCH may be configured to be used in the operation of MBSFN (Multicast-broadcast single-frequency network).

[0734] For example, the PDSCH may be configured as a "shared data channel for transmitting downlink user data, which aggregates and transmits all data irrelevant to the C (control)-plane / U (user)-plane."

[0735] 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 radio resources”.

[0736] By carrying out the above-mentioned implementation, in multicast / broadcast data transmission, the base station can transmit data symbols and control information symbols 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 symbol reception.

[0737] (Implementation 5)

[0738] In this embodiment, the base station (700) sends Figure 9 The structures of the symbol groups of stream 1 and stream 2 are supplemented.

[0739] Figure 38 An example of the frame structure of stream 1 sent by the base station (700) is shown. Figure 38 In the frame structure of , 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, Figure 38 This is a frame structure of a multi-carrier transmission method such as the OFDM (Orthogonal Frequency Division Multiplexing) method.

[0740] Figure 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.

[0741] 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 Figure 9 Codeword group #i (901-i) of stream 1.

[0742] The symbol area 3801_2 of stream 1 is set to exist from time 1 to time 10 and carriers 21 to 40.

[0743] At this time, as described in Embodiment 4, for example, when the base station transmits individual data to one or more terminals (performs unicast), it is possible to use Figure 38 Codeword areas 3801_1 and 3801_2 of stream 1.

[0744] and, Figure 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.

[0745] Figure 39 An example of the frame structure of stream 2 sent by the base station (700) is shown. Figure 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, Figure 39 It becomes a frame of a multi-carrier transmission system such as the OFDM system.

[0746] Figure 39 The symbol area 3901_1 of stream 2 in is set to exist from time 1 to time 10 and carrier 1 to carrier 9.

[0747] 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 Figure 9 Codeword group #i (902-i) of stream 2.

[0748] Symbol area 3901_2 of stream 2 is assumed to exist from time 1 to time 10 and carriers 21 to 40.

[0749] At this time, as described in Embodiment 4, for example, when the base station transmits data independently to one or more terminals (performs unicast), it is possible to use Figure 39 Code element areas 3901_1 and 3901_2 of stream 2.

[0750] and, Figure 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.

[0751] In addition, the base station will Figure 38 At the moment X(in Figure 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 Figure 38 In the case of Y being an integer greater than or equal to 1 and less than or equal to 40) the code element and Figure 39 The code element of time X and carrier Y is sent using the same frequency and the same time.

[0752] And, about Figure 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. Figure 38 The characteristics of the code group #i of stream 1 are the same as Figure 9 The symbol group of stream 1 is the same as described in the above-described embodiment.

[0753] And, about Figure 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. Figure 39 The characteristics of the code group #i of stream 2 are the same as Figure 9 The symbol group of stream 2 is the same as described in the above-described embodiment.

[0754] in addition, Figure 38 、 Figure 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).

[0755] Furthermore, the base station Figure 38 、 Figure 39 In the frame structure of Figure 9 In the case of the frame shown, the same implementation as in Embodiment 1 and Embodiment 4 is performed.

[0756] By carrying out the above implementation, in multicast / broadcast data transmission, the base station transmits data symbols and control information symbols using multiple transmission beams, and the terminal selectively receives beams with good quality from the multiple transmission beams. Accordingly, the terminal can obtain the effect of higher data reception quality at the terminal by receiving the data symbols.

[0757] (Implementation 6)

[0758] In this embodiment, the base station (700) sends Figure 14 Supplementary explanation is given on the structure of the code group of modulation signal 1 and the code group of modulation signal 2.

[0759] Figure 40 An example of a frame structure of a modulated signal 1 transmitted by a base station (700) is shown. Figure 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, Figure 40 This is a frame structure of a multi-carrier transmission method such as the OFDM (Orthogonal Frequency Division Multiplexing) method.

[0760] Figure 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.

[0761] 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 Figure 14 Code group #i (1401-i) of the modulation signal 1.

[0762] 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.

[0763] At this time, as described in Embodiment 4, for example, when the base station transmits data independently to one or more terminals (performs unicast), it is possible to use Figure 40 Codeword areas 4001_1 and 4001_2 of stream 1.

[0764] therefore, Figure 40 The symbol group #i (4000_i) of the modulated signal 1 is used in the transmission of multicast data by the base station as described in Embodiment 1, Embodiment 4, etc.

[0765] Figure 41 An example of the frame structure of the modulated signal 2 sent by the base station (700) is shown. Figure 41 In the frame structure of , 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, Figure 41 It becomes a frame of a multi-carrier transmission system such as the OFDM system.

[0766] Figure 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.

[0767] Symbol group #i (4100_i) of modulation signal 2 is assumed 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 Figure 14 Code group #i (1402-i) of the modulated signal 2.

[0768] The code element area 4101_2 of the modulated signal 2 is set to exist from time 1 to time 10 and carrier 21 to carrier 40.

[0769] At this time, as described in Embodiment 4, for example, when the base station transmits data independently to one or more terminals (performs unicast), it is possible to use Figure 41 Code element areas 4101_1 and 4101_2 of the modulated signal 2.

[0770] therefore, Figure 41 The codeword group #i (4100_i) of the modulated signal 2 is used in the base station to transmit data for multicast as described in Implementation Mode 1, Implementation Mode 4, etc.

[0771] In addition, the base station will Figure 40 At the moment X (in Figure 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 Figure 40 In the case of Y being an integer greater than or equal to 1 and less than or equal to 40), the code element Figure 41 The code element of time X and carrier Y is sent using the same frequency and the same time.

[0772] Therefore, about Figure 14 The characteristics of the symbol group #1 of stream 1 of 1401_1, the symbol group #2 of modulated signal 1 of 1401_2, and the symbol group #3 of modulated signal 1 of 1401_3 are as described in the above-described embodiment. Figure 40 The characteristics of the code group #i of the modulation signal 1 are the same as Figure 14 The code element group of the modulated signal 1 is the same as described in the embodiment described above.

[0773] And, about Figure 14 The characteristics of 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 are as described in the above-described embodiment. Figure 41 The characteristics of the code group #i of the modulation signal 2 are the same as Figure 14The code element group of the modulated signal 2 is the same as described in the embodiment described above.

[0774] In addition, Figure 40 、 Figure 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).

[0775] Furthermore, the base station Figure 40 、 Figure 41 In the frame structure of Figure 14 In the case of such a frame, the same implementation as described in Embodiment 1 and Embodiment 4 can be performed.

[0776] Regarding the above description Figure 38 The symbol areas 3801_1, 3801_2, Figure 39 The symbol areas 3901_1, 3901_2, Figure 40 The code element areas 4001_1, 4001_2, Figure 41 An example of how to use the code element areas 4101_1 and 4102_2 of the modulation signal 2 is described.

[0777] Figure 42 Shows the Figure 38 The symbol areas 3801_1, 3801_2, Figure 39 The symbol areas 3901_1, 3901_2, Figure 40 The code element areas 4001_1, 4001_2, Figure 41 An example of allocating the modulated signal 2 code element area 4101_1, 4102_2" to the terminal. In addition, Figure 42 In the figure, the horizontal axis is time and the vertical axis is frequency (carrier).

[0778] like Figure 42 As shown, for example, Figure 38 The symbol areas 3801_1, 3801_2, Figure 39 The symbol areas 3901_1, 3901_2, Figure 40 The code element areas 4001_1, 4001_2, Figure 41 The code element areas 4101_1 and 4102_2 of the modulated signal 2 are divided into frequencies 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.

[0779] For example, the base station (700) communicates with terminal #1, terminal #2, and terminal #3. When the base station transmits data to terminal #1, it uses Figure 42 The base station transmits data to terminal #1. When the base station transmits data to terminal #2, it uses Figure 42 The base station transmits data to terminal #2. When the base station transmits data to terminal #3, it uses Figure 42 The base station transmits the data to terminal #3 using the “symbol group 4201_3 allocated to terminal #3”.

[0780] In addition, the method of distribution to the terminal is not affected by Figure 42 The frequency band (number of carriers) can be changed over time and can be set arbitrarily. Therefore, the method of allocating frequencies to terminals can be changed over time.

[0781] Figure 43 Shown with Figure 42 Different directions Figure 38 The symbol areas 3801_1, 3801_2, Figure 39 The symbol areas 3901_1, 3901_2, Figure 40 The code element areas 4001_1, 4001_2, Figure 41 This is an example of allocation of the symbol areas 4101_1 and 4102_2" of the modulated signal 2. Figure 43 In the figure, the horizontal axis is time and the vertical axis is frequency (carrier).

[0782] like Figure 43 As shown, for example, Figure 38 The symbol areas 3801_1, 3801_2, Figure 39 The symbol areas 3901_1, 3901_2, Figure 40 The code element areas 4001_1, 4001_2, Figure 41 The symbol areas 4101_1 and 4102_2 of the modulated signal 2 are time- and frequency-divided and allocated to the terminals. Therefore, 4301_1 is a symbol group allocated to terminal #1, 4301_2 is a symbol group allocated to terminal #2, 4301_3 is a symbol group allocated to terminal #3, 4301_4 is a symbol group allocated to terminal #4, 4301_5 is a symbol group allocated to terminal #5, and 4301_6 is a symbol group allocated to terminal #6.

[0783] 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, it uses Figure 43 The base station transmits data to terminal #1 using the symbol group 4301_1 assigned to terminal #1. Figure 43 The base station transmits data to terminal #2. When the base station transmits data to terminal #3, it uses Figure 43 The base station transmits data to terminal #3. When the base station transmits data to terminal #4, it uses Figure 43 The base station transmits data to terminal #4. When the base station transmits data to terminal #5, it uses Figure 43 The base station transmits data to terminal #5. When the base station transmits data to terminal #6, it uses Figure 43 The base station transmits the data to terminal #6 using the “symbol group 4301_6 allocated to terminal #6”.

[0784] In addition, the method of distribution to the terminal is not affected by Figure 43 The frequency band (number of carriers) and time width can be changed and arbitrarily set. Therefore, the allocation method to terminals can be changed over time.

[0785] And, in Figure 38 、 Figure 39 、 Figure 40 、 Figure 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. Figure 43 、 Figure 44 The weighted combining parameters are set for the terminals assigned as shown. The weighted combining method for setting the carrier is not limited to these examples.

[0786] By carrying out the above implementation, in multicast / broadcast data transmission, the base station transmits data symbols and control information symbols using multiple transmission beams, and the terminal selectively receives beams with good quality from the multiple transmission beams. Accordingly, the terminal can obtain the effect of higher data reception quality at the terminal by receiving the data symbols.

[0787] (Implementation 7)

[0788] In this manual, Figure 7 、 Figure 12 、 Figure 17 、 Figure 18 、 Figure 19 、 Figure 20 、 Figure 22 The base station 700 in the embodiment may be a base station structure as described in other embodiments. Figure 44 The structure shown.

[0789] The following Figure 44 The operation of the base station is described below. Figure 44 In the Figure 1 、 Figure 3 The same operations are assigned the same reference numerals and their descriptions are omitted.

[0790] 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 based on 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.

[0791] For example, let the signal 103_i after signal processing (i is an integer greater than 1 and less than M) be ui(t) (t is time), and let the signal 4401_g after weighted synthesis (g is an integer greater than 1 and less than K) be vg(t), then vg(t) can be expressed by the following formula.

[0792] [Formula 7]

[0793]

[0794] The wireless unit 104_g receives the weighted combined signal 4401_g and the control signal 159 as input, performs predetermined processing based on the control signal 159, generates and outputs a transmission signal 105_g, and transmits the signal 105_g from the antenna 303_1.

[0795] 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.

[0796] Although the equation (7) is expressed as a function of time, in the case of a multi-carrier system such as the OFDM system, it may be a function of frequency in addition to time.

[0797] For example, in the OFDM system, different weighted combining can be performed for each carrier, and the weighted combining method can be determined based on multiple carriers. The setting of the weighted combining method for each carrier is not limited to these examples.

[0798] (Supplement 6)

[0799] Of course, the embodiments, supplements, and other contents described in this specification may be implemented in various combinations.

[0800] And, as a base station structure, as an example, it is not affected by 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.

[0801] In addition, each embodiment 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 method, error correction coding method (error correction code used, code length, coding rate, etc.), control information, etc." are applied.

[0802] Regarding modulation schemes, the embodiments and other contents described in this specification can be implemented even when modulation schemes other than those described in this specification are 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.), and QAM (e.g., 4QAM, 8QAM, 16QAM, 64QAM, 128QAM, 256QAM, 1024QAM, 4096QAM, etc.) can be used. Uniform mapping or non-uniform mapping can also be used in each modulation scheme. Moreover, 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.

[0803] In this specification, a transmitter can be considered to be a communication / broadcasting device such as a broadcast station, base station, access point, terminal, or mobile phone. A receiver can be considered to be a communication device such as a television, radio, terminal, personal computer, mobile phone, access point, or base station. Furthermore, the transmitter and receiver in this disclosure can be considered to be devices with communication functionality that are connected to a device such as a television, radio, personal computer, or mobile phone via some interface to execute an application. Furthermore, in this embodiment, symbols other than data symbols, such as pilot symbols (preamble, unique word, postamble, reference symbol, etc.) and control information symbols, can be arranged in any manner within a frame. While these symbols are referred to as pilot symbols and control information symbols, any naming convention is acceptable; the important thing is the function itself.

[0804] Pilot symbols, for example, can be known symbols modulated using PSK modulation in a transceiver. The receiver uses these symbols for frequency synchronization, time synchronization, channel estimation (CSI (Channel State Information) estimation) of each modulated signal, and signal detection. Alternatively, the pilot symbols can be synchronized with the receiver, allowing the receiver to know the symbols sent by the transmitter.

[0805] In addition, the code elements used for control information are code elements used to transmit information other than data (data of applications, etc.) that needs to be transmitted to the communication party (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.).

[0806] In addition, the present disclosure is not limited to the embodiments and can be implemented with various modifications. For example, in each embodiment, the case where the communication method is implemented as a communication device is described, but the present disclosure is not limited to this and the communication method can also be implemented as software.

[0807] Alternatively, for example, a program for executing the above-mentioned communication method may be stored in advance in a ROM, and the program may be executed by the CPU.

[0808] 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 to cause the computer to operate according to the program.

[0809] Furthermore, each structure of each of the above-mentioned embodiments can typically be implemented as an integrated circuit, i.e., an LSI, having input terminals and output terminals. They can be made into a single chip, or they can be made into a single chip by including 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 it 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 the LSI is manufactured, or a reconfigurable processor that can reconfigure the connections and settings of the circuit units inside the LSI. Moreover, if an integrated circuit technology that replaces LSI emerges due to advances in semiconductor technology or other derived technologies, then of course, this technology can also be used to integrate functional blocks. It can also be an application in biotechnology.

[0810] This manual describes various frame structures. Figure 1 A 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 OFDM. When a terminal (user) communicating with the base station (AP) transmits a modulated signal, a method can be considered in which the modulated signal transmitted by the terminal is a single-carrier method. (By using OFDM, the base station (AP) can simultaneously transmit data symbol groups to multiple terminals, and by having the terminals use a single-carrier method, power consumption can be reduced.)

[0811] Alternatively, the terminal may employ a TDD (Time Division Duplex) transmission modulation method using a portion of the frequency band used for the modulated signal transmitted by the base station (AP).

[0812] Figure 1 The structure of antenna units 106-1, 106-2, ..., 106-M is not limited to the structure described in the embodiment. For example, antenna units 106-1, 106-2, ..., 106-M do not need to be composed of multiple antennas, and antenna units 106-1, 106-2, ..., 106-M do not need to receive signal 159 as input.

[0813] Figure 4 The structures of antenna units 401-1, 401-2, ..., 401-N are not limited to those described in the embodiments. 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 receive signal 410 as input.

[0814] 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. In this case, there are multiple methods for generating a modulation signal of the 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.

[0815] And, in Figure 1 、 Figure 3 、 Figure 44 Among the information #1 (101_1), information #2 (101_2), ..., information #M (101_M), there is at least multicast (broadcast) data. For example, 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.

[0816] 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.

[0817] exist Figure 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.

[0818] In addition, regarding the status of multiple streams or modulated signals, such as using Figure 7 、 Figure 9 、 Figure 12 、 Figure 14 、 Figure 17 、 Figure 18 、 Figure 19 As explained above.

[0819] Moreover, in Figure 1 、 Figure 3 、 Figure 44 The information #1 (101_1), information #2 (101_2), ..., information #M (101_M) may also include data for individual terminals. This is as described in the embodiment of this specification.

[0820] 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 this disclosure via wireless or wired communication. Furthermore, all or part of the software for updating can be downloaded via wireless or wired communication. Furthermore, the downloaded software can be saved to a storage unit, and at least one of the FPGA and the CPU can be operated based on the saved software to perform the digital signal processing described in this disclosure.

[0821] In this case, a device including at least one of an FPGA and a CPU can be connected to a communication modem via wireless or wired communication, and the communication method described in this disclosure can be implemented through the device and the communication modem.

[0822] For example, a communication device such as a base station, AP, or terminal described in this specification may include at least one of an FPGA and a CPU, and the communication device may include an interface for externally obtaining software for operating at least one of the FPGA and the CPU. Furthermore, the communication device may include a storage unit for storing the externally obtained software, and the signal processing described in this disclosure may be implemented by operating the FPGA and the CPU according to the stored software.

[0823] The following describes an example of a communication system to which the wireless communication method using multiple antennas described in Embodiments 1 to 7 can be applied. The wireless communication method using multiple antennas described in Embodiments 1 to 7 is merely an example of a wireless communication method applicable to the communication system described later. That is, the wireless communication method used in the communication system described later can be the wireless communication method using multiple antennas described in Embodiments 1 to 7, or it can be another wireless communication method using multiple antennas. Furthermore, the wireless communication method used in the communication system described later can be a wireless communication method using a single antenna, or it can be a communication method that uses a device other than antennas, such as optical communication.

[0824] (Implementation A1)

[0825] In this embodiment, a method of constructing a network using the communication system according to this embodiment will be described.

[0826] Figure 45 An example of a network connection to a gateway is shown. Figure 45 , the communication system of this embodiment is described.

[0827] like Figure 45 As shown, the communication system includes: an outdoor gateway 4501, an indoor gateway 4502, an outdoor network 4503, and an indoor network 4504.

[0828] Outdoor gateway 4501 is a gateway device connected to communicate with outdoor network 4503. Outdoor gateway 4501 includes a communication IF (interface) 4501a, a communication IF 4501b, and a wireless power receiving unit 4501c. Outdoor gateway 4501 can be implemented, for example, by a computer. However, it does not need to be a computer. Outdoor gateway 4501 is equivalent to the first communication device. Alternatively, outdoor gateway 4501 can be a node constituting outdoor network 4503.

[0829] The communication IF 4501a is a communication interface device that can be connected to the external network 4503 in a communicative manner.

[0830] The communication IF 4501b is a communication interface device that is connected in a manner capable of communicating with the indoor gateway 4502.

[0831] The wireless power receiving unit 4501c is a power receiving device that receives power wirelessly from the indoor gateway 4502. Power can be supplied using electromagnetic induction, wireless power transmission, or wireless power supply. More specifically, the Qi standard can be used, for example. However, applicable power transmission methods are not limited to these.

[0832] The outdoor gateway 4501 receives communication frames from surrounding communication devices through communication IFs 4501a and 4501b and transmits them to other appropriate communication devices. Furthermore, the outdoor gateway 4501 exchanges routing information with surrounding communication devices through communication IFs 4501a and 4501b, thereby controlling which frames are transmitted by which communication IF.

[0833] Indoor gateway 4502 is a gateway device connected to the indoor network 4504 in a manner capable of communicating. Indoor gateway 4502 includes a communication interface 4502a, a communication interface 4502b, a power receiving unit 4502c, and a wireless power supply unit (wireless power transmission unit) 4502d. Indoor gateway 4502 can be implemented, for example, by a computer. However, it does not need to be a computer. Indoor gateway 4502 is equivalent to the second communication device. Alternatively, indoor gateway 4502 can be a node constituting indoor network 4504.

[0834] The communication IF 4502a is a communication interface device that can be connected to the in-home network 4504 in a communicative manner.

[0835] The communication IF 4502b is a communication interface device connected in a manner capable of communicating with the outdoor gateway 4501.

[0836] The power receiving unit 4502c is a power supply terminal disposed indoors, for example, from an outlet or a USB (Universal Serial Bus) connector, and receives power for driving the indoor gateway 4502. The power receiving unit 4502c is connected to an outlet via a power cord to receive, for example, AC100V power, or is connected to a USB (Universal Serial Bus) connector to receive power.

[0837] The wireless power supply unit (wireless power transmission unit) 4502d is a power supply device (power transmission device) that wirelessly supplies power to the outdoor gateway 4501. The power supplied by the wireless power supply unit 4502d is a portion of the power received by the power receiving unit 4502c from the outlet. The power supply is similar to that of the wireless power receiving unit 4501c.

[0838] The indoor gateway 4502 receives communication frames from surrounding communication devices through communication IFs 4502a and 4502b and transmits them to other appropriate communication devices. Furthermore, the indoor gateway 4502 exchanges routing information with surrounding communication devices through communication IFs 4502a and 4502b, thereby controlling which frames are sent by which communication IF.

[0839] Outdoor network 4503 is, for example, a network located in an outdoor space (also referred to as a first space). Outdoor network 4503 is a wireless network (also referred to as a first network), specifically, a network compliant with communication standards such as IEEE 802.11ad or IEEE 802.11ay. However, the network may also utilize communication methods other than these standards (e.g., IEEE 802.11a, IEEE 802.11g, IEEE 802.11n, IEEE 802.11ac, IEEE 802.11ax, or cellular technology standards).

[0840] Outdoor network 4503 may also be connected to a wired network constructed using optical fiber, etc. In this case, outdoor network 4503 has the function of connecting indoor network 4504 to the wired network. Alternatively, outdoor network 4503 may not be connected to the wired network, but may be a closed network.

[0841] Indoor network 4504 is a network located in an indoor space (also referred to as a second space). Indoor network 4504 is a wireless network (also referred to as a second network), specifically, a network compliant with communication standards such as IEEE 802.11ad or IEEE 802.11ay. However, this network may also utilize communication methods other than these standards (e.g., IEEE 802.11a, IEEE 802.11g, IEEE 802.11n, IEEE 802.11ac, IEEE 802.11ax, or cellular technology standards).

[0842] In addition, the outdoor gateway 4501 or the indoor gateway 4502 may have, for example, Figure 1 (or Figure 3 ,or Figure 44 ) composition. In addition, Figure 1 (or Figure 3 ,or Figure 44 ) and Figure 4 Since the work of each part has been explained, the explanation is omitted.

[0843] Alternatively, the indoor space and the outdoor space may be separated by a plate-like object. In this case, communication IF 4501b and communication IF 4502b are connected wirelessly via radio waves through the plate-like object. Examples of the plate-like object include an outer wall (e.g., an outer wall of a building or a residence) or a glass plate (e.g., a glass plate installed in an opening of a building or a residence).

[0844] Furthermore, when the outdoor network 4503 is a wireless network, the communication IF 4501a is a wireless communication interface. Furthermore, when the indoor network 4504 is a wireless network, the communication IF 4502a is a wireless communication interface.

[0845] Furthermore, communication IF 4501a performs communication using, for example, TDMA (Time Division Multiple Access) and communication IF 4502a performs communication using, for example, CSMA (Carrier Sense Multiple Access). However, communication IF 4501a may perform communication using a method other than TDMA, and communication IF 4502a may perform communication using a method other than CSMA.

[0846] Furthermore, the outdoor network 4503 and the indoor network 4504 can each be a wireless multi-hop network (via a wireless mesh network). In this case, the communication IF 4501a is connected to the outdoor network 4503 composed of a wireless multi-hop network (via a wireless mesh network), and the communication IF 4502a is connected to the indoor network 4504 composed of a wireless multi-hop network (via a wireless mesh network).

[0847] In addition, the control method of the communication system includes the following steps: a step of connecting to the outdoor network 4503 through the outdoor gateway 4501; a step of conducting wireless communication through the outdoor gateway 4501; a step of connecting to the indoor network 4504 through the indoor gateway 4502; and a step of connecting to the outdoor gateway 4501 through wireless communication through the indoor gateway 4502.

[0848] Figure 46 An example of the configuration of a communication system is shown. More specifically, Figure 46 This is a schematic diagram showing an example of the configuration of an outdoor network 4503, ie, a mesh network, using a wireless signal repeater (also simply referred to as a "repeater").

[0849] Multiple repeaters are respectively configured at multiple locations in a predetermined area to form a mesh-type wireless backhaul. For example, repeater 4800B transmits the signal received from repeater 4800A to repeater 4800C. Furthermore, repeater 4800B transmits the signal received from repeater 4800A to edge node (or node) 4810 connected to repeater 4800B. Edge node (or node) 4810 is a gateway device installed in a residence. Furthermore, repeater 4800B transmits the signal received from edge node (or node) 4810 connected to repeater 4800B to other repeaters 4800C.

[0850] The wireless connection from the repeater 4800B to the home is called WTTH (Wireless To The Home). However, the name is not limited to this.

[0851] Furthermore, the edge node (or node) can also be a network gateway device installed in a building. In this way, the wireless connection from the repeater to the building is called WTTB (Wireless To The Building). However, the name is not limited to this.

[0852] Furthermore, the edge node (or node) may also be, for example, a Wi-Fi access point.

[0853] In this way, the use case of connecting edge nodes (or nodes) in the outdoor network 4503 via wireless is generally referred to as WTTX (Wireless to the X).

[0854] Figure 47 An example of the configuration of the indoor network 4504 is shown.

[0855] Figure 47 The indoor network 4504 shown here constitutes a mesh network (multi-hop network) and includes: MP (Mesh Point) *1, MP*2, MP*3, MP*4, MP*5, MP*6, MP*7 and MP*8 (also referred to as "MP*1, etc."), MAP (Mesh Access Point) #1, MAP#2, MAP#3 and MAP#4 (also referred to as "MAP#1, etc."). In addition, the indoor gateway 4502 is also described here as a node of the mesh network. Moreover, MP*1, etc. or MAP#1, etc., for example, have Figure 1 (or Figure 3 ,or Figure 44 ) composition. In addition, for Figure 1 (or Figure 3 ,or Figure 44 ) and Figure 4Since the work of each part has been explained, the explanation is omitted.

[0856] Furthermore, a "dashed line" connecting MPs or MAPs indicates that the MPs or MAPs connected by the dashed line can communicate with each other, and a "solid line" connecting MPs or MAPs indicates that the communication link connecting them is selected as a communication path of the mesh network.

[0857] For example, indoor gateway 4502 and MP*1, connected by a solid line, are in a communication state, and the communication link connecting indoor gateway 4502 and MP*1 is selected as the communication path. Furthermore, MP*3 and MP*4, connected by a dashed line, are in a communication state, but the communication link connecting MP*3 and MP*4 is not selected as the communication path. Furthermore, MP*3 and MAP#3, which are not connected by either a solid or dashed line, are not in communication state.

[0858] MP*1 and others are nodes that make up the mesh network. Each MP*1 and others has a routing table. By forwarding data packets according to the routing table, communication between terminals connected to the mesh network and other communication devices is possible. Routing tables can be static routing tables, which are set statically, or dynamic routing tables, which are set dynamically by MP*1 and others exchanging information using a routing protocol.

[0859] MAP#1 and other nodes, for example, each constitute a mesh network and also function as a base station (access point) providing wireless access to terminals located indoors. The mesh network-forming functions of MAP#1 and other nodes are similar to those of MP*1 and other nodes. Furthermore, the base station functions of MAP#1 and other nodes are similar to those of a typical base station. MAP#1 and other nodes function as base stations (access points) for wireless LANs (Local Area Networks) in the 2.4 GHz, 5 GHz, and 60 GHz bands, for example.

[0860] MP*1, etc. and MAP#1, etc. perform (1) initial work for forming a mesh network, (2) work for forming a mesh network (specifically, communication path determination processing, etc.), and (3) work for transmitting data packets by MP*1, etc. and MAP#1, etc., so that the terminal connected to MAP#1, etc. can communicate with the indoor gateway 4502 via the mesh network.

[0861] The above operations (1) to (3) will be described in detail later.

[0862] (1) Initial work on forming a mesh network

[0863] Indoor gateway 4502, MP*1, MAP#1, etc., each search for adjacent nodes. Furthermore, the node is any of indoor gateway 4502, MP*1, MAP#1, etc. This indicates that, for example, MP*3 can communicate with MP*1, MP*2, MP*4, and MP*6. In this case, MP*3, for example, can also perform beamforming training accordingly.

[0864] In addition, the indoor gateway does not search for devices installed outdoors (for example, outdoor gateway, outdoor MP, outdoor MAP, none of which are shown in the figure).

[0865] Specifically, indoor gateway 4502, MP*1, etc., and MAP#1, etc., respectively, notify surrounding nodes of the status of their indoor network via frames. Similarly, outdoor gateway 4501, outdoor MP, and outdoor MAP notify surrounding nodes of the status of their outdoor network via frames.

[0866] Therefore, information about the network to which each node belongs is included in the transmission frame. Furthermore, the transmission frame may include control information indicating whether the information in the frame is "broadcast (multicast) information" or "unicast information." Furthermore, the transmission frame includes information indicating whether each node as the transmission source is a gateway (specifically, indoor gateway 4502 or outdoor gateway 4501), an MP (specifically, indoor MP*1 or an outdoor MP), or a MAP (specifically, indoor MAP#1 or an outdoor MAP).

[0867] Next, each node shares the connection information. Here, the connection information is broadcast (multicast) to the surrounding area. Indoor gateway 4502, MP#1, etc., MAP*1, etc. obtain the surrounding node connection information.

[0868] For example, MP*3 recognizes that it can communicate with MP*1. Thus, MP*3 transmits "MP*3 can communicate with MP*1" to other nodes (indoor gateway 4502, indoor MP#1, and indoor MAP*1).

[0869] Therefore, for example, MP*3 transmits the information that "MP*3 can communicate with MP*1" to MP*1, MP*2, MP*4, MP*6, and MAP#4. MP*6 transmits the information that "MP*3 can communicate with MP*1" to MP*7, MP*5, and MAP#2. MP*1, MP*2, MP*4, and MAP#4 also transmit the information that "MP*3 can communicate with MP*1."

[0870] Here, if the indoor gateway 4502, MP*1, etc., and each node of MAP#1 receive the same data as the data received in the past, a function is required not to broadcast (multicast) (not to transmit) the data.

[0871] For example, MAP#4 first receives information from MP*3 that "MP*3 can communicate with MP*1." MAP#4 then transmits this information to MP*1, MAP#1, and MAP#1. Next, MAP#4 receives information from MP*3 that "MP*3 can communicate with MP*1." At this point, MAP#4 does not transmit this information to MP*1, MAP#1, and MAP#1. However, broadcast (multicast) is performed only within the in-home network.

[0872] When performing the above operations, each node transmits a frame including, for example, "a symbol for beamforming", "a control information symbol", "a data symbol", etc. An example of such a frame is Figure 48 Shown. Figure 48 The horizontal axis is set as time, and the above-mentioned frame structure is shown. Figure 48 The following describes an example in which a frame having the structure shown is transmitted by the first node.

[0873] The symbols used for beamforming are symbols used to determine the signal processing method for transmit beamforming and the signal processing method for receive beamforming when the first node communicates with the communication partner node.

[0874] The control information codeword includes at least one of a "network attribute information codeword", a "node information codeword", and a "device identification information codeword".

[0875] The network attribute information symbol is information about the network to which the first node belongs. For example, the network attribute information symbol is a symbol for notifying either "the first node belongs to an indoor network" or "the first node belongs to an outdoor network."

[0876] The node information symbol is information about the node to which the first node belongs, and is a symbol for notifying, for example, any of "the first node is a gateway," "the first node is an MP," and "the first node is a MAP."

[0877] The device identification information symbol is a symbol for notifying other nodes of a unique number for device identification of a first node.

[0878] Reference Figure 49 as well as Figure 50 , the initial work for forming a mesh network is described. Figure 49 The flow of communication between the first node and other nodes after the first node transmits a frame in operation (1) is shown.

[0879] like Figure 49 As shown, first, the first node sends the frame in operation (1) to the second node and the third node respectively. This frame transmission can be considered as more than one time. Then, the second node and the third node each send a frame in response to the received frame to the first node.

[0880] Figure 50 The frame structure of the frame used by the first node when transmitting connection information to other nodes is shown. Figure 50 , set the horizontal axis to time.

[0881] like Figure 50 As shown, the frame includes a preamble, control information codewords, and data codewords.

[0882] The preamble is a symbol used for time synchronization, frame synchronization, and frequency synchronization between the first node and the communicating party. For example, the control information symbol includes a "data receiving end information symbol" and a "transmission method information symbol."

[0883] The data recipient information symbol is information about the recipient of the frame transmitted by node 1. For example, if node 1 transmits the frame to node 2, the data recipient information symbol indicates that the frame is transmitted to node 2.

[0884] The transmission method information symbol is a symbol used to transmit information related to the transmission method of the frame transmitted by the first node. Since this frame is a broadcast (or multicast) frame, the information that it is a multicast frame is included in the transmission method information symbol. Furthermore, if the transmitted frame is a unicast frame, this information may also be included. Information related to the transmission method, such as information on the error correction coding method / modulation scheme used when generating data symbols and the number of streams transmitted, may also be included.

[0885] A data symbol is a symbol including data carried by the frame. For example, a data symbol includes a "connection information symbol."

[0886] The connection information symbol is used to transmit information about the nodes to which the first node is connected. For example, if the first node is connected to the second node and the third node, the "connection information symbol" includes the information "The first node is connected to the second node" and "The first node is connected to the third node." Furthermore, this symbol may also include information unique to the identification of the first node, information unique to the identification of the second node, and information unique to the identification of the third node.

[0887] In the above example, a broadcast (multicast) frame is described. Therefore, the second node that receives the frame sends a connection information symbol to the other nodes. Furthermore, the third node also sends a connection information symbol to the other nodes.

[0888] That is, a node that receives a connection information symbol transmits a frame including the connection information symbol. However, as previously described, if a node that has received a connection information symbol once and then transmitted a frame including the connection information symbol receives a connection information symbol again, it will not transmit the frame including the connection information symbol.

[0889] In this way, each node can know the composition of the mesh network.

[0890] (2) Processing for forming a mesh network

[0891] Two methods for forming a mesh network are described below. The first method involves indoor gateway 4502 creating a route map for each MAP. The second method involves indoor gateway 4502 creating a route map for each MAP but not sharing the route map. These methods are described in detail below.

[0892] (2-1) The first method

[0893] In the first method, the indoor gateway 4502 creates a path map for each MAP. In addition, as a result of creating the path map, a mesh network is formed, for example, by Figure 51 Shown.

[0894] Indoor gateway 4502 creates a route map for MAP#1. This route map shows, for example, that (a) indoor gateway 4502 transmits data to MP*4, MP*4 transmits data to MP*5, MP*5 transmits data to MP*6, MP*6 transmits data to MP*7, and MP*7 transmits data to MAP#1, thereby enabling indoor gateway 4502 to transmit data to MAP#1. Furthermore, (b) MAP#1 transmits data to MP*7, MP*7 transmits data to MP*6, MP*6 transmits data to MP*5, MP*5 transmits data to MP*4, and MP*4 transmits data to indoor gateway 4502, thereby enabling MAP#1 to transmit data to indoor gateway 4502.

[0895] To share the route map with MAP#1, indoor gateway 4502 sends a frame containing the route map information to MAP#1. The frame containing the route map information includes information related to the node's route as control information. Each node forwarding the frame can refer to this control information to determine the frame's forwarding destination.

[0896] (3) Data packet transmission

[0897] When indoor gateway 4502 subsequently transmits information to MAP#1, it transmits data according to this routing diagram. Specifically, indoor gateway 4502 transmits control information related to the node's routing according to the routing diagram. Each node sequentially transmits frames based on this transmitted control information.

[0898] When MAP#1 transmits information to indoor gateway 4502, it transmits data according to the routing diagram. Specifically, MAP#1 transmits control information related to the node routing according to the routing diagram. Each node sequentially transmits frames based on the transmitted control information.

[0899] Figure 52 An example of a frame structure is shown. Figure 52 FIG. 4 shows an example of a frame structure in which the indoor gateway 4502 transmits information to MAP#1. Figure 52 , the horizontal axis is time.

[0900] For example, the indoor gateway 4502 sends a preamble. The preamble is a symbol used by MP*4 to perform time synchronization, frame synchronization, and frequency synchronization when receiving the modulated signal of the frame (it can also be used for signal detection).

[0901] The control information symbol includes a “node route information symbol” and a “transmission method information symbol.” The data symbol is a symbol including data for the indoor gateway 4502 to transmit to MAP#1.

[0902] The node's route information symbol is a symbol used to transmit information related to the "route map when the indoor gateway 4502 transmits the frame to MP*4."

[0903] The transmission method information symbol is a symbol used to transmit information related to the transmission method of frames transmitted by indoor gateway 4502. For example, the transmission method information symbol may include information such as "whether the data is broadcast or unicast," information about the error correction coding method / modulation scheme used to generate the modulated signal of the data symbol, and information related to the transmission method such as the number of streams to be transmitted.

[0904] The data symbol is a symbol including data for the indoor gateway to transmit to MAP#1, and is a symbol sent by the indoor gateway to MP*4.

[0905] The same frame structure is used when MP*4 sends a modulation signal to MP*5, when MP*5 sends a modulation signal to MP*6, when MP*6 sends a modulation signal to MP*7, and when MP*7 sends a modulation signal to MAP#1. Therefore, the data sent by the indoor gateway 4502 can be transmitted to MAP#1.

[0906] In addition, this frame structure can also be considered as a frame in which MAP#1 transmits information to the indoor gateway 4502.

[0907] For example, MAP#1 transmits a preamble. The preamble is a symbol used for time synchronization, frame synchronization, and frequency synchronization when MP*7 receives the modulated signal of the frame (it can also be used for signal detection).

[0908] The control information symbol includes a “node route information symbol” and a “transmission method information symbol.” The data symbol is a symbol including data for MAP#1 to transmit to the indoor gateway 4502 .

[0909] The node route information symbol is a symbol for transmitting information on a "route map when MAP#1 transmits the frame to MP*7".

[0910] The transmission method information symbol is used to transmit information related to the transmission method of the frame transmitted by MAP #1. For example, the transmission method information symbol may include information such as whether the data is broadcast or unicast, the error correction coding method / modulation scheme used to generate the modulated signal of the data symbol, and information related to the transmission method such as the number of streams to be transmitted.

[0911] The data symbol is a symbol including data for MAP#1 to transmit to the indoor gateway 4502, and is a symbol sent by MAP#1 to MP*7.

[0912] The same frame structure is used when MP*7 sends a modulated signal to MP*6, when MP*6 sends a modulated signal to MP*5, when MP*5 sends a modulated signal to MP*4, and when MP*4 sends a modulated signal to the indoor gateway. Accordingly, the data sent by MAP#1 can be transmitted to the indoor gateway 4502.

[0913] (2-2) The second method

[0914] In the second method, the indoor gateway 4502 creates a route map for each MAP, but does not share it.

[0915] Figure 53 An example of the structure of an indoor network is shown. In addition, as a result of creating a path map, a mesh network is formed, for example, by Figure 53 Shown.

[0916] Indoor gateway 4502 creates a route map for MAP#1. This route map shows, for example, (a) data is transmitted from indoor gateway 4502 to MP*4, which then transmits data to MP*5, which then transmits data to MP*6, which then transmits data to MP*7, which then transmits data to MAP#1. Furthermore, (b) data is transmitted from MAP#1 to MP*7, which then transmits data to MP*6, which then transmits data to MP*5, which then transmits data to MP*5, which then transmits data to MP*4, which then transmits data to the indoor gateway. This allows MAP#1 to transmit data to indoor gateway 4502.

[0917] (3) Data packet transmission

[0918] The indoor gateway 4502 transmits information based on the information in the route map. When transmitting this information, the indoor gateway 4502 also transmits control information including information related to the node's route. Therefore, each node can know the frame's destination based on the control information it receives.

[0919] Similarly, MAP#1 creates a routing map for indoor gateway 4502. MAP#1 then transmits information based on the information in this routing map. When transmitting this information, MAP#1 also transmits control information including information about the node's route. Therefore, each node can determine the frame's destination based on the transmitted control information.

[0920] Regarding the frame structure and working example, Figure 52 Same as the instructions in .

[0921] As described above, wireless communication between the indoor gateway 4502 and the terminal can be achieved, thereby providing an indoor environment with minimal wiring for data transmission. Furthermore, wireless data communication can also be achieved between the indoor network and the outdoor network, thereby providing an environment with minimal wiring for data transmission.

[0922] Next, two cases of timing for executing the above-mentioned operation (1), namely, case 1 and case 2, will be described (see Figure 54 Case 1 is a case where operations (1) and (2) are executed at a certain time interval. Case 2 is a case where operation (1) is executed again when an MP or MAP is added to the indoor network.

[0923] Case 1 has already been described. Now, Case 2 will be described.

[0924] Here, consider Figure 55 The network configuration shown changes to Figure 56 In addition, for Figure 55 The network structure has been explained, so the description is omitted. Figure 56 The network structure shown is in Figure 55 The network structure shown has MP*100 added. And the structure of the indoor network 4504 after the addition of MP*100 is as follows: Figure 57 Shown.

[0925] For the processing when MP*100 is added to the indoor network 4504, refer to Figure 58 Provide explanation.

[0926] First, MP* 100 notifies the nodes in the in-home network 4504 of the status of joining the in-home network 4504. At this time, the "notice of joining the in-home network" is broadcast (multicast).

[0927] In fact, the above notification is only notified to the neighboring nodes of MP*100. Figure 57 As shown, since the adjacent nodes of MP*100 are the indoor gateway and MP*6, the above notification is received by the indoor gateway 4502 and MP*6.

[0928] In response, MP* 100 broadcasts (multicasts) the "reset request for in-home network configuration." The "reset request for in-home network configuration" is received by the in-home gateway and MP* 6 in the same manner as described above.

[0929] Next, the indoor gateway 4502 and MP*6 broadcast (or multicast) the "notification of joining the indoor network" and the "reset request for the indoor network configuration." After this, other nodes also broadcast (or multicast) the "notification of joining the indoor network" and the "reset request for the indoor network configuration." The example of the broadcast (or multicast) transmission rules is the same as that previously described.

[0930] In the above example, an MP is added to the in-home network 4504, but a MAP may also be added. In this case, the above description of the MP operation can be replaced with the MAP operation to achieve the same result.

[0931] After that, the operations (1) and (2) are performed, so that the operation (3) can be performed.

[0932] As described above, by configuring a network capable of adding new MPs or MAPs to the in-home network 4504, the indoor communication environment can be improved, thereby achieving an effect of improving data transmission quality and data transmission speed.

[0933] In addition, although the above description mentions "indoor network", indoor gateway 4502, MP*1, etc., and MAP#1, etc. can also be installed outdoors. In other words, the installation location of indoor gateway 4502, MP*1, etc., and MAP#1, etc. is not limited to indoors.

[0934] Furthermore, although MP*1 and the like have a relay function (data transmission function), MP*1 and the like may also have an access point function for communicating with the terminal. Similarly, the indoor gateway 4502 may also have an access point function for communicating with the terminal.

[0935] Furthermore, the indoor gateway 4502, MP*1, etc., and MAP#1, etc. may also include devices that generate data from cameras or sensors. Furthermore, the indoor gateway 4502, MP*1, etc., and MAP#1, etc. may include interfaces for connecting to devices that generate data from cameras or sensors, and may use the relay function (data transmission function) described in this embodiment to transmit data generated by these devices to the terminal or indoor gateway 4502.

[0936] (Supplement A1)

[0937] exist Figure 45 In the embodiment, the indoor gateway 4502 receives power from an AC (Alternating Current) power supply or a DC (Direct Current) power supply via a power receiving unit 4502c, for example, via a wired connection. This allows the indoor gateway 4502 to be supplied with more stable power.

[0938] Furthermore, if the outdoor gateway 4501 does not have a power receiving unit that receives power from an AC or DC power source via a wired connection, a possible configuration, as shown in the figure, is to receive power from the indoor gateway 4502 via wireless power supply. More specifically, power is wirelessly supplied (transmitted) from the wireless power supply unit 4502d of the indoor gateway 4502 to the wireless power receiving unit 4501c of the outdoor gateway 4501. This configuration reduces the possibility of short circuits in the power receiving unit that receives power from an AC or DC power source via a wired connection, even in rainy or snowy conditions, thereby achieving a water droplet protection effect.

[0939] Figure 45 、 Figure 46 or Figure 47 Indoor gateway 4502 and outdoor gateway 4501, Figure 46 Wi-Fi AP and repeater in Figure 47 The MP and MAP in the UE may have a wireless communication function in one frequency band or in two or more frequency bands.

[0940] Here, “having a wireless communication function in one frequency band” may be, for example, “having a wireless communication function only in the 60 GHz band”.

[0941] Furthermore, “having wireless communication functions in more than two frequency bands” can be, for example, “having wireless communication functions in the 2.4 GHz frequency band and wireless communication functions in the 60 GHz frequency band”, or “having wireless communication functions in the 5 GHz frequency band and wireless communication functions in the 60 GHz frequency band”, or “having wireless communication functions in the 2.4 GHz frequency band and wireless communication functions in the 5 GHz frequency band, and wireless communication functions in the 60 GHz frequency band”.

[0942] Furthermore, the phrase "having wireless communication capabilities in two or more frequency bands" is not limited to the above. For example, it can also be "having wireless communication capabilities in frequency band A (Hz) and wireless communication capabilities in frequency band B (Hz). Here, A is a real number greater than 0, B is a real number greater than 0, and A≠B holds."

[0943] And it may also be another case, "having wireless communication function of frequency band A (Hz), wireless communication function of frequency band B (Hz), and wireless communication function of frequency band C (Hz). Here, A is a real number greater than 0, B is a real number greater than 0, C is a real number greater than 0, A≠B, A≠C, and B≠C hold."

[0944] Figure 45 、 Figure 46 or Figure 47 Indoor gateway 4502 and outdoor gateway 4501, Figure 46 Wi-Fi AP and repeater in Figure 47 The MP and MAP in the embodiment may also have optical communication functions, and the mesh network (multi-hop network) described in this specification can be constructed by optical communication to relay frames. This method can also achieve the same effects as described above.

[0945] And, in Figure 45 Between the indoor gateway 4502 and the outdoor gateway 4501, there may be an object that allows light to pass through, such as a glass window (for example, a glass plate), and optical communication can be used in the communication between the indoor gateway 4502 and the outdoor gateway 4501.

[0946] For example, in a WTTH network formed using outdoor gateway 4501, wireless communication is performed via radio waves, and in indoor network 4504 formed using indoor gateway 4502, wireless communication is also performed via radio waves. In this case, communication between indoor gateway 4502 and outdoor gateway 4501 can be optical communication, wireless communication via radio waves, or communication in which the communication status is switched between optical communication and wireless communication via radio waves. Furthermore, communication in which the optical communication and wireless communication via radio waves are switched depending on the materials of the indoor and outdoor gateways can also be performed.

[0947] (Implementation A2)

[0948] Figure 59 Shown Figure 47 An example of the composition of the nodes in (i.e., indoor gateway 4502, MP*1, etc., and MAP#1, etc.). Figure 59 The illustrated configuration shows functions related to transmission and reception of frames among functions possessed by the node.

[0949] First transceiver 1505 is a transceiver for a first wireless communication method using a frequency band A (Hz). Second transceiver 1514 is a transceiver for a second wireless communication method using a frequency band B (Hz). Here, A is a real number greater than or equal to 0, B is a real number greater than or equal to 0, and A>B. For example, the first wireless communication method uses a frequency band of 60 GHz (A=60 GHz), and the second wireless communication method uses a frequency band of 2.4 GHz (B=2.4 GHz).

[0950] In addition, Figure 59 Although an example of a node configuration using two frequency bands is shown, a node may use three or more frequency bands. In this case, the node is equipped with a transceiver required for communication in the three or more frequency bands.

[0951] First transceiver 1505 receives received signal 1502 received by antenna 1501, performs demodulation, error correction decoding, and other processing, and outputs received data 1506. Received signal 1502 is a signal of the first wireless communication method in the frequency band A (Hz).

[0952] Furthermore, the first transceiver 1505 takes the received signal 1502 as input, estimates the communication environment, and outputs a reception status signal 1599 .

[0953] First transceiver 1505 receives transmit data 1507 as input, performs processing such as error correction coding, mapping, and frequency conversion, and generates and outputs transmit signal 1504. Antenna 1503 outputs transmit signal 1504 as a radio wave. Transmit signal 1504 is a signal of the first wireless communication method in the frequency band of A (Hz).

[0954] The shared information generating unit 1508 receives the received data 1506 and the reception status signal 1599 as input, generates and outputs information 1509 for sharing. This will be described later.

[0955] Second transceiver 1514 receives received signal 1511 received by antenna 1510, performs demodulation, error correction decoding, and other processing, and outputs received data 1515. Received signal 1511 is a signal of the second wireless communication method in the B (Hz) frequency band.

[0956] Second transceiver 1514 receives transmit data 1516 and shared information 1509 as input, performs error correction coding, mapping, frequency conversion, and other processing, and generates and outputs transmit signal 1513. Antenna 1512 then outputs transmit signal 1513 as radio waves. Transmit signal 1513 is a signal of the second wireless communication method in the B (Hz) frequency band.

[0957] Figure 60 Shown Figure 47 An example of communication between MP*3 and MP*4 in the example. In addition, MP*3 and MP*4 are Figure 59 The device of the structure shown.

[0958] exist Figure 60 Graph 1651 shows the communication flow of MP*3's first transceiver 1505. Graph 1652 shows the communication flow of MP*3's second transceiver 1514. Graph 1661 shows the communication flow of MP*4's first transceiver 1505. Graph 1662 shows the communication flow of MP*4's second transceiver 1514. In graphs 1651, 1652, 1661, and 1662, the horizontal axis represents time.

[0959] like Figure 60 As shown, first, the first transceiver 1505 of MP*3 sends a frame 1601. In addition, an example of the structure of the frame 1601 is as follows: Figure 48 Furthermore, frame 1601 is a frame of the "first wireless communication method of the frequency band A (Hz)".

[0960] For example, first transceiver 1505 of MP*4 receives frame 1601. After receiving frame 1601, first transceiver 1505 of MP*4 estimates the reception state of first transceiver 1505 of MP*3 when it transmitted the modulated signal. Furthermore, first transceiver 1505 of MP*4 obtains device identification information from the device identification information symbol, thereby recognizing that it was MP*3 that transmitted the modulated signal.

[0961] Then, the second transceiver 1514 of MP*4 transmits the frame 1602. Note that the frame 1602 is a frame of the "second wireless communication method in the frequency band of B (Hz)".

[0962] An example of the structure of frame 1602 is Figure 61 In addition, the horizontal axis represents time. For example, the structure of frame 1602 is considered to include a preamble, a control information codeword, and a data codeword.

[0963] Figure 61 The preamble in the communication is a symbol used by the communicating party for time synchronization and frequency synchronization, for example. (Signal detection may also be performed.) In this description, the communicating party is considered to be one or more, or two or more, devices. Here, the devices are indoor gateway 4502, MP#1, etc., MAP*1, etc.

[0964] exist Figure 61 The control information symbols in the include a transmission method information symbol. This transmission method information symbol includes information indicating whether frame 1602 is a broadcast (multicast) frame or a unicast frame. Furthermore, frame 1602 is a broadcast (multicast) frame. Furthermore, it may include information about the error correction coding method / modulation scheme used when generating data symbols, and information related to the transmission method, such as the number of streams to be transmitted.

[0965] Figure 61 The data codewords include information codewords for sharing. Figure 60 In the case of the communication shown, the information symbols for sharing include the following information: "an estimate of the reception state when the first transceiver 1505 of MP*3 transmits the modulated signal" and "MP*3 transmits the modulated signal".

[0966] Then, the frame 1602 transmitted by the second transceiver 1514 of MP*4 is received by one or more or two or more devices, and these devices obtain information on "the estimated reception state when the first transceiver 1505 of MP*3 transmitted the modulated signal" and "the one that transmitted the modulated signal is MP*3". Figure 47 , frame 1602 is received by indoor gateway 4502, MP*1, MP*2, MP*3, MP*5, MP*6, MP*7, MP*8, MAP#1, MAP#2, MAP#3 and MAP#4.

[0967] These can be easily achieved by A>B. This is because radio waves with relatively low frequencies have a longer communication distance.

[0968] This allows one or more devices, or two or more devices, to easily monitor the communication status of MP*3 and MP*4. This also allows the mesh network configuration of each node to be easily understood, and a path map within the mesh network to be easily created.

[0969] In addition, although the description here is about a method of sharing the communication status between MP*3 and MP*4, the same can be performed for sharing the communication status between devices other than "the communication status between MP*3 and MP*4".

[0970] Furthermore, for example, the first wireless communication method may use a 60 GHz (A=60G) frequency band, and the second wireless communication method may use a 5 GHz (B=5G) frequency band. However, the present invention is not limited to this example.

[0971] Furthermore, although the indoor environment is used as an example in this description, it is not limited thereto. Figure 47 The indoor gateway 4502 in the example can perform the same operations as the outdoor gateway 4501 and achieve the same effects as described above.

[0972] Furthermore, the information contained in the information symbols for sharing is not limited to the examples described in this embodiment. For example, a configuration that can be considered is that, based on the formation of a mesh network (multi-hop network), the information required for sharing can also be included in the information symbols for sharing.

[0973] (Implementation A3)

[0974] Figure 62 Shown Figure 47 An example of the configuration of the indoor gateway 4502, MP*1, etc., and MAP#1, etc. The first transceiver 1505 is a transceiver of the first wireless communication method for optical communication, and the second transceiver 1514 is a transceiver of the second wireless communication method for the frequency band B (Hz), where B is a real number greater than 0. In addition, Figure 62 Although two transceivers are shown as an example, a configuration including three or more transceivers may be used.

[0975] The first transceiver 1505 receives the received signal 1502 received by the light receiving unit 1801, performs demodulation, error correction decoding, and other processing, and outputs received data 1506. The light receiving unit 1801 can be implemented, for example, as a photodiode, a CMOS (Complementary Metal Oxide Semiconductor) image sensor, or an organic CMOS image sensor.

[0976] Furthermore, the first transceiver 1505 takes the received signal 1502 as input, estimates the communication environment, and outputs a reception status signal 1599 .

[0977] First transceiver 1505 receives transmit data 1507 as input, performs processing such as error correction coding, mapping, and frequency conversion, and generates and outputs transmit signal 1504. Light emitting unit 1803 then outputs transmit signal 1504 as radio waves. Light emitting unit 1803 can be implemented, for example, by an LED (Light Emitting Diode).

[0978] The shared information generating unit 1508 receives the received data 1506 and the reception status signal 1599 as input, generates and outputs information 1509 for sharing. This will be described later.

[0979] Second transceiver 1514 receives received signal 1511 received by antenna 1510, performs demodulation, error correction decoding, and other processing, and outputs received data 1515. Received signal 1511 is a signal of the second wireless communication method in the B (Hz) frequency band.

[0980] Second transceiver 1514 receives transmit data 1516 and shared information 1509 as input, performs error correction coding, mapping, frequency conversion, and other processing, and generates and outputs transmit signal 1513. Antenna 1512 then outputs transmit signal 1513 as radio waves. Transmit signal 1513 is a signal of the second wireless communication method in the B (Hz) frequency band.

[0981] Figure 60 Shown Figure 47 This is an example of communication between MP*3 and MP*4. Figure 62 The device that constitutes the .

[0982] exist Figure 60 Graph 1651 shows the communication flow of MP*3's first transceiver 1505. Graph 1652 shows the communication flow of MP*3's second transceiver 1514. Graph 1661 shows the communication flow of MP*4's first transceiver 1505. Graph 1662 shows the communication flow of MP*4's second transceiver 1514. In graphs 1651, 1652, 1661, and 1662, the horizontal axis represents time.

[0983] like Figure 60 As shown, first, the first transceiver 1505 of MP*3 sends a frame 1601. In addition, an example of the structure of the frame 1601 is as follows: Figure 48 Also, frame 1601 is a frame of the optical communication method.

[0984] For example, MP*4's first transceiver 1505 receives frame 1601. After receiving frame 1601, MP*4's first transceiver 1505 estimates the reception state when MP*3's first transceiver 1505 transmitted the modulated signal. Furthermore, MP*4's first transceiver 1505 obtains device identification information from the device identification information symbol, thereby recognizing that MP*3 transmitted the modulated signal.

[0985] In this manner, the second transceiver 1514 of MP*4 transmits the frame 1602. Note that the frame 1602 is a frame of the "second wireless communication method in the frequency band of B (Hz)".

[0986] An example of the structure of frame 1602 is Figure 61 . In addition, the horizontal axis represents time. For example, the structure of frame 1602 includes a preamble, a control information codeword, and a data codeword.

[0987] Figure 61 The preamble in is a code element used by the communicating party to perform time synchronization and frequency synchronization. In this description, the communicating party is one or more or two or more devices. In this case, the devices are indoor gateway 4502, MP#1, MAP*1, etc.

[0988] exist Figure 61 The control information symbols in the include a transmission method information symbol. This transmission method information symbol includes information indicating whether frame 1602 is a broadcast (multicast) frame or a unicast frame. Furthermore, frame 1602 is a broadcast (multicast) frame. Furthermore, it may include information on the error correction coding method / modulation scheme used when generating data symbols, and information related to the transmission method, such as the number of streams to be transmitted.

[0989] exist Figure 61 The data symbols in the , include information symbols for sharing. Figure 60 In the case of the communication shown, the information symbols for sharing include information on "an estimate of the reception state when the first transceiver 1505 of MP*3 transmits a modulated signal" and information on "MP*3 transmitted the modulated signal."

[0990] Furthermore, the frame 1602 transmitted by the second transceiver 1514 of MP*4 is received by one or more or two or more devices, and these devices obtain information on "the estimated reception state when the first transceiver 1505 of MP*3 transmitted the modulated signal" and "the one that transmitted the modulated signal is MP*3". Figure 47, frame 1602 is received by indoor gateway 4502, MP*1, MP*2, MP*3, MP*5, MP*6, MP*7, MP*8, MAP#1, MAP#2, MAP#3 and MAP#4.

[0991] In this case, the second wireless communication method in the B (Hz) frequency band can be easily realized by using radio waves. This is because optical communication takes into account the linearity of light and therefore has a limited range of communication.

[0992] This allows one or more devices, or two or more devices, to easily monitor the communication status of MP*3 and MP*4. This also allows the mesh network configuration of each node to be easily understood, and a path map within the mesh network (multi-hop network) to be easily created.

[0993] In addition, although the description herein focuses on a method for sharing the communication status between MP*3 and MP*4, the same method can be applied to sharing the communication status between devices other than the communication status between MP*3 and MP*4.

[0994] Furthermore, although the indoor environment is used as an example in this description, it is not limited thereto. Figure 47 The indoor gateway 4502 in the example can be used as the outdoor gateway 4501 to perform the instructions so far and can achieve the same effect.

[0995] In addition, the information for sharing included in the information code element for sharing is not limited to the example described in this embodiment. For example, a configuration that can be considered is that the information required for sharing is included in the information code element for sharing based on the formation of a mesh network (multi-hop network).

[0996] (Implementation A4)

[0997] In embodiment A2, Figure 59 for Figure 47 The composition of the nodes (i.e., indoor gateway 4502, MP*1, etc., and MAP#1, etc.) is as follows: the first transceiver 1505 is a transceiver of the first wireless communication method for the frequency band A (Hz), the second transceiver 1514 is a transceiver of the second wireless communication method for the frequency band B (Hz), A is a real number greater than 0, B is a real number greater than 0, and A>B.

[0998] At this point, the communication method of the first transceiver 1505 and the communication method of the second transceiver 1514 will be described.

[0999] Examples of multiplexing methods include time division multiplexing (TDM), frequency division multiplexing (FDM), carrier sense multiple access (CSMA), and carrier sense multiple access with collision avoidance (CSMA / CA).

[1000] Figure 63 An example of allocation of time resources when TDM is performed is shown. Figure 63 , the horizontal axis is time.

[1001] like Figure 63 As shown, at the first time, a modulated signal is considered to be transmitted by the first communication device 1901. At the second time, a modulated signal is considered to be transmitted by the second communication device 1902. At the third time, a modulated signal is considered to be transmitted by the third communication device 1903. At the fourth time, a modulated signal is considered to be transmitted by the first communication device 1904.

[1002] In this way, the sender of the modulated signal (frame) is switched by the time slot. In particular, a method of communicating with multiple communication devices by changing the time is called TDMA (Time Division Multiple Access).

[1003] Figure 64 An example of frequency resource allocation when performing FDM is shown. Figure 64 In the figure, the horizontal axis is frequency.

[1004] like Figure 64 As shown, in the first frequency band, a modulated signal is considered to be transmitted by the first communication device 2001. In the second frequency band, a modulated signal is considered to be transmitted by the second communication device 2002. At a third time, a modulated signal is considered to be transmitted by the third communication device 2003. At a fourth time, a modulated signal is considered to be transmitted by the first communication device 2004.

[1005] In this way, the modulated signal (frame) is switched by the frequency slot. In particular, the method of communicating with multiple communication devices by changing the frequency is called FDMA (Frequency Division Multiple Access).

[1006] Figure 65 An example of a frame in the time axis when CSMA is executed is shown. Figure 65 , the horizontal axis is time.

[1007] like Figure 65 As shown in FIG. 2 , there is a section where no radio waves exist. The first communication device confirms the section where no radio waves exist and transmits a modulated signal 2101 .

[1008] Thus, a communication device that wishes to initiate communication must first check whether nearby communication devices are transmitting radio waves before starting communication. In particular, CSMA with collision avoidance is called CSMA / CA (Carrier Sense Multiple Access with Collision Avoidance). To avoid collisions, it waits for a certain period of time whenever a nearby communication device transmits radio waves. When no radio waves are emitted from the surrounding area, it then transmits radio waves at a random time.

[1009] As described in Embodiment A2, MP*4 will Figure 54 Frame 1602 is shown as being transmitted to multiple communication devices. In this case, frame 1602 can be a CSMA or CSMA / CA frame. This is because, considering that the timing of frame 1602 transmission is not a fixed period and that frame 1602 is a broadcast (multicast) frame, frame 1602 is transmitted using CSMA or CSMA / CA, allowing multiple communication devices to reliably receive frame 1602. Furthermore, this eliminates the need for a communication device for controlling FDM or FDMA, or TDM or TDMA.

[1010] Furthermore, communications over a mesh network (multi-hop network) can use any of FDM or FDMA, TDM or TDMA, CSMA, or CSMA / CA. In mesh network communications, using FDM or FDMA, or TDM or TDMA, can achieve the effect of discontinuous data transmission. For example, these methods are suitable for discontinuously relaying modulated signals.

[1011] In communications over a mesh network (multi-hop network), when CSMA or CSMA / CA is employed, each communication device can reduce power consumption because the modulated signal is transmitted only when data transmission is required.

[1012] So, for example, in Figure 47In the mesh network, FDM or FDMA, or TDM or TDMA is used in the first wireless communication method, and CSMA or CSMA / CA is used in the second wireless communication method (that is, frame 1602 is sent in CSMA or CSMA / CA mode), thereby achieving the above-mentioned effect.

[1013] And, as another method, for example, Figure 47 In the mesh network, the first wireless communication method and the second wireless communication method can both adopt CSMA or CSMA / CA.

[1014] Moreover, for example in Figure 47 In a mesh network (multi-hop network), the preferred method is selected as the first wireless communication method based on the communication conditions, propagation environment, or communication form, from "FDM or FDMA, or TDM or TDMA" and "CSMA or CSMA / CA." As the second wireless communication method, CSMA or CSMA / CA is used (i.e., frame 1602 is transmitted using CSMA or CSMA / CA), thereby achieving the aforementioned effects. In particular, in the first wireless communication method, the preferred method is selected as the first wireless communication method based on the communication conditions, propagation environment, or communication form, thereby achieving the effect of constructing an optimal mesh network (multi-hop network) according to the communication conditions, propagation environment, or communication form.

[1015] In addition, Figure 60 In the transmission of frame 1602, if there is a communication device for controlling FDM or FDMA, or TDM or TDMA, FDM or FDMA, or TDM or TDMA can also be used for transmission.

[1016] Furthermore, although the indoor environment is used as an example in this description, it is not limited thereto. Figure 47 The indoor gateway 4502 in the example can also perform the same operations as the outdoor gateway 4501 and obtain the same effects as described above.

[1017] (Implementation A5)

[1018] As shown in Embodiment A3, the first wireless communication method may be an optical communication method, and the second wireless communication method may be a communication method using radio waves in the B (Hz) frequency band.

[1019] At this time, Figure 47In a mesh network (multi-hop network), by using CSMA or CSMA / CA in the second wireless communication method (i.e., sending frame 1602 in CSMA or CSMA / CA mode), the effect of reducing power consumption of each communication device can be achieved.

[1020] In addition, Figure 60 In the transmission of frame 1602, if there is a communication device for controlling FDM or FDMA, or TDM or TDMA, FDM or FDMA, or TDM or TDMA can also be used for transmission.

[1021] Furthermore, although the indoor environment is used as an example in this description, it is not limited thereto. Figure 47 The indoor gateway 4502 in the example can perform the same operations as the outdoor gateway 4501 and achieve the same effects as described above.

[1022] (Supplement A2)

[1023] In this specification, particularly when wireless communication is performed via radio waves, the number of antennas transmitting the modulated signal may be one or more. Similarly, the number of antennas receiving the modulated signal may be one or more. Therefore, when there are two or more antennas transmitting the modulated signal, a MIMO (Multiple-Input Multiple-Output) scheme, which uses multiple antennas to transmit multiple modulated signals, can be employed. Therefore, the various embodiments of this specification can be implemented even when the MIMO scheme is employed, and the same effects can be achieved.

[1024] (Implementation A6)

[1025] In this embodiment, an access control method using the network described in this specification will be described.

[1026] Figure 66 The system co...

Claims

1. A transmission system for multiple TRPs, wherein: The TRP is a sending and receiving point, and the sending system includes: A first transmitting device; a second transmitting device; and processor, The processor is composed of: Controlling the first sending device and the second sending device to send information to a user terminal, wherein the information indicates whether simultaneous communication is supported; controlling the first transmitting device to perform a first transmission of a first PDSCH in a first frequency channel, the PDSCH being a physical downlink shared channel; and controlling the second transmitting device to perform a second transmission of a second PDSCH in a second frequency channel different from the first frequency channel, wherein: When the information indicates that the simultaneous communication is supported, the processor controls the first transmission to partially overlap with the second transmission in the time domain, and When the information indicates that the simultaneous communication is not supported, the processor controls the first transmission to not overlap with the second transmission in the time domain.

2. The transmission system according to claim 1, wherein: The first information in the first PDSCH is the same as the second information in the second PDSCH.

3. The transmission system according to claim 1, wherein: When the information indicates that the simultaneous communication is supported, the processor selects whether to control the first transmission of the first PDSCH in the first frequency channel to completely overlap with the second transmission of the second PDSCH in the second frequency channel in the time domain, or to control the first transmission of the first PDSCH in the first frequency channel to partially overlap with the second transmission of the second PDSCH in the second frequency channel in the time domain.

4. A user terminal for multiple TRPs, wherein: The TRP is a transmission and reception point, and the user terminal includes a receiver and a processor, The receiver is configured to receive: information from the first transmitting device and the second transmitting device, the information indicating whether simultaneous communication is supported; a first PDSCH from the first transmitting device in a first frequency channel, the PDSCH being a physical downlink shared channel; and a second PDSCH from said second transmitter in a second frequency channel different from said first frequency channel, The processor is configured to control the receiver to receive at least one of the first PDSCH and the second PDSCH according to the information, wherein: When the information indicates that the simultaneous communication is supported, the receiver is further configured to receive the first PDSCH and the second PDSCH transmitted in a partially overlapping manner in the time domain, and When the information indicates that the simultaneous communication is not supported, the receiver is further configured to receive the first PDSCH and the second PDSCH transmitted in a non-overlapping manner in the time domain.

5. The user terminal according to claim 4, wherein: When the information indicates that the simultaneous communication is supported, the receiver is further configured to receive the first PDSCH and the second PDSCH sent in a manner that completely overlaps in the time domain, or to receive the first PDSCH and the second PDSCH sent in a manner that partially overlaps in the time domain.

Images