CN111083081A - Data communication method based on dual-carrier modulation and related device - Google Patents

Data communication method based on dual-carrier modulation and related device Download PDF

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Publication number
CN111083081A
CN111083081A CN201811223866.3A CN201811223866A CN111083081A CN 111083081 A CN111083081 A CN 111083081A CN 201811223866 A CN201811223866 A CN 201811223866A CN 111083081 A CN111083081 A CN 111083081A
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data stream
low
order
modulated data
order modulated
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吴涛
陈特彦
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Priority to PCT/CN2019/111594 priority patent/WO2020078405A1/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2626—Arrangements specific to the transmitter only
    • H04L27/2627—Modulators
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/022—Site diversity; Macro-diversity
    • H04B7/024—Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/12—Frequency diversity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
    • H04L27/20—Modulator circuits; Transmitter circuits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/28—Systems using multi-frequency codes with simultaneous transmission of different frequencies each representing one code element

Abstract

The application provides a data communication method based on dual-carrier modulation and a related device, wherein a first network device sends a first high-order modulation data stream on a first subcarrier and sends a fourth high-order modulation data stream on a second subcarrier; the second and third higher order modulated data streams are transmitted by the cooperating second network device on the second and first subcarriers, respectively. The first high-order modulation data stream and the second high-order modulation data stream are obtained based on the first low-order modulation data stream and the second low-order modulation data stream; the third high-order modulated data stream and the fourth high-order modulated data stream are both obtained based on the third low-order modulated data stream and the fourth low-order modulated data stream; therefore, the first low-order modulation data stream to the fourth low-order modulation data stream can be transmitted on different subcarriers by different network equipment, so that space diversity and frequency diversity are realized, and the system performance is greatly improved.

Description

Data communication method based on dual-carrier modulation and related device
Technical Field
The present application relates to the field of communications technologies, and in particular, to a data communication method and a related apparatus based on dual carrier modulation.
Background
With the pursuit of high-speed networks and the interconnection of everything, many aspects such as system capacity, spectrum efficiency and the like in the mobile communication process also face huge challenges. For example, in order to improve the system throughput of the network, a multi-node cooperative communication method may be adopted, which not only can improve the system throughput, but also can solve the problem of interference between different nodes. However, how to further improve the system performance in the current multi-node cooperation scenario is an urgent problem to be solved.
Disclosure of Invention
The application provides a data communication method based on dual-carrier modulation and a related device, which can improve the system performance.
In a first aspect, the present application provides a data communication method based on dual carrier modulation, in which a first terminal device may receive, on a first subcarrier, a first high-order modulated data stream sent by a first network device and a third high-order modulated data stream sent by a second network device; the first terminal device further receives a second high-order modulation data stream sent by the second network device and a fourth high-order modulation data stream sent by the first network device on the second subcarrier respectively; the first high-order modulation data stream and the second high-order modulation data stream are both obtained by a first low-order modulation data stream and a second low-order modulation data stream based on a first matrix, and the third high-order modulation data stream and the fourth high-order modulation data stream are both obtained by a third low-order modulation data stream and a fourth low-order modulation data stream based on a second matrix; the first terminal device may demodulate the first high-order modulated data stream to the fourth high-order modulated data stream by using the first matrix and the second matrix, thereby obtaining a data stream of the first terminal device.
In this embodiment, the first high-order modulated data stream and the second high-order modulated data stream both include the first low-order modulated data stream and the second low-order modulated data stream, and are respectively transmitted by different network devices on the first subcarrier and the second subcarrier, so that both the first low-order modulated data stream and the second low-order modulated data stream realize frequency diversity and spatial diversity, and similarly, both the third low-order modulated data stream and the fourth low-order modulated data stream realize frequency diversity and spatial diversity, which greatly improves system performance.
In the embodiment of the present invention, the first matrix and the second matrix may be the same or different, and may be indicated by indication information in the downlink control information.
In an optional implementation manner, whether a transmission manner of cooperative dual carrier modulation is adopted may be predetermined between the terminal device and the network device. The transmission mode of cooperative dual carrier modulation is to transmit the data stream of the terminal device by adopting the modes of multi-network device cooperation and dual carrier modulation, so as to realize space diversity and frequency diversity. The implementation method does not need signaling interaction to inform the sending mode adopted by the terminal equipment, thereby saving signaling overhead. For the case of two network devices cooperating, the transmission mode of the cooperative dual carrier modulation may be: the first network equipment transmits the first high-order modulation data stream on a first subcarrier and transmits the fourth high-order modulation data stream on a second subcarrier; and the second network equipment transmits the third high-order modulation data stream on the first subcarrier and transmits the second high-order modulation data stream on the second subcarrier.
In another optional implementation manner, whether a transmission manner of cooperative dual carrier modulation is adopted may be indicated by a first indication in the downlink control information between the terminal device and the network device. For example, the first terminal device receives downlink control information, where the downlink control information includes a first instruction, and the first instruction is used to instruct whether the first high-order modulated data stream to the fourth high-order modulated data stream adopt a transmission manner of cooperative dual carrier modulation. According to the embodiment, the sending mode adopted by the terminal equipment can be flexibly notified through the downlink control information, so that the sending mode which is more matched with the channel state can be adopted by combining the channel state, and the system performance can be improved.
In this embodiment of the present invention, the first low-order modulated data stream to the fourth low-order modulated data stream may be data streams of a first terminal device, or may also be data streams of two terminal devices.
In a case that the first low-order modulated data stream to the fourth low-order modulated data stream are data streams of two terminal devices, the two terminal devices may include a first terminal device and a second terminal device. For example, the first low-order modulated data stream and the second low-order modulated data stream are data streams of one terminal device, and the third low-order modulated data stream and the fourth low-order modulated data stream are data streams of another terminal device. For another example, the first low-order modulated data stream and the third low-order modulated data stream are data streams of one terminal device, and the second low-order modulated data stream and the fourth low-order modulated data stream are data streams of another terminal device. Therefore, when the first network device and the second network device send the data streams of the first terminal device and the second terminal device, the frequency diversity effect and the space diversity effect can be achieved, so that the system performance is improved, and in this case, the first network device and the second network device can communicate with the two terminals in parallel, so that the communication efficiency is improved.
In this embodiment of the present invention, whether the first low-order modulation data stream to the fourth low-order modulation data stream are data streams of one terminal device or data streams of two terminal devices may be predetermined, or may be explicitly indicated or implicitly indicated by indication information. For example, in the display indication manner, the indication information carried in the downlink control information may be used to indicate whether the first to fourth low-order modulated data streams are data streams of one terminal device or data streams of two terminal devices. In the implicit indication mode, the number of identifiers of the terminal devices carried in the downlink control information may be used to determine whether the first to fourth low-order modulated data streams are data streams of one terminal device or data streams of two terminal devices.
In this embodiment of the present invention, when the first low-order modulated data stream to the fourth low-order modulated data stream are data streams of two terminal devices, in an optional implementation, the downlink control information further includes a second indication, where the second indication is used to indicate a correspondence relationship between the first low-order modulated data stream to the fourth low-order modulated data stream and the two terminal devices, and in this implementation, the second indication may also implicitly indicate that the first low-order modulated data stream to the fourth low-order modulated data stream are data streams of the two terminal devices. In another optional implementation manner, the downlink control information further includes identifiers of two terminal devices, and an order of the identifiers of the two terminal devices in the downlink control information is used to indicate a correspondence relationship between the first low-order modulated data stream to the fourth low-order modulated data stream obtained by the terminal device and the device identifiers of the two terminal devices. The corresponding relationship is used for determining terminal devices to which the first low-order modulation data stream to the fourth low-order modulation data stream belong respectively.
The first and second high-order modulated data streams are obtained by modulating the first and second low-order modulated data streams with the first matrix, and the third and fourth high-order modulated data streams are obtained by modulating the third and fourth low-order modulated data streams with the second matrix, so that the second indication may be directly used to indicate the correspondence between the first to fourth high-order modulated data streams and the two terminal devices, if the first and second low-order modulated data streams are both data streams of one terminal device and the third and fourth low-order modulated data streams are both data streams of another terminal device. Thus, since the third and fourth higher-order modulated data streams do not include the first and second lower-order modulated data streams, the first terminal device can directly discard the third and fourth higher-order modulated data streams when receiving the third and fourth higher-order modulated data streams, thereby avoiding the processing resources wasted by further demodulation.
Similarly, when the first and second low-order modulation data streams are both data streams of one terminal device, and the third and fourth low-order modulation data streams are both data streams of another terminal device, the terminal device may also determine the terminal devices to which the first to fourth high-order modulation data streams belong according to the sequence of the identifiers of the terminal devices in the downlink control information, thereby directly discarding the high-order modulation data streams that do not belong to the terminal device, and saving the processing resources of the terminal device.
In an optional implementation manner, when the first to fourth low-order modulated data streams are data streams obtained by Binary Phase Shift Keying (BPSK), the first to fourth high-order modulated data streams are data streams obtained by Quadrature Phase Shift Keying (QPSK). Wherein the first matrix and the second matrix are each one of the following Q:
Figure BDA0001835454630000031
Figure BDA0001835454630000032
Figure BDA0001835454630000033
Figure BDA0001835454630000034
in another optional embodiment, when the first to fourth low-order modulated data streams are data streams obtained by Quadrature phase shift keying QPSK Modulation, the first to fourth high-order modulated data streams are data streams obtained by 16Quadrature Amplitude Modulation (16 QAM). Wherein the first matrix and the second matrix are each one of the following Q:
Figure BDA0001835454630000035
Figure BDA0001835454630000036
Figure BDA0001835454630000037
Figure BDA0001835454630000038
in a second aspect, the present application further provides a data communication method based on dual carrier modulation, where the data communication method is described from a network device side, where a first network device or a second network device determines a first high-order modulated data stream to a fourth high-order modulated data stream, and sends the second and third high-order modulated data streams to the second network device or the first network device for sending. The first high-order modulation data stream and the second high-order modulation data stream are both obtained by a first low-order modulation data stream and a second low-order modulation data stream based on a first matrix, and the third high-order modulation data stream and the fourth high-order modulation data stream are both obtained by a third low-order modulation data stream and a fourth low-order modulation data stream based on a second matrix; the first network device transmits a first higher order modulated data stream on a first subcarrier and a fourth higher order modulated data stream on a second subcarrier, and the second higher order modulated data stream and the third higher order modulated data stream are transmitted by a cooperating second network device on the second subcarrier and the first subcarrier, respectively.
In this embodiment, it can be seen that, the first network device transmits the first higher-order modulated data stream on the first subcarrier, transmits the fourth higher-order modulated data stream on the second subcarrier, and the second network device transmits the third higher-order modulated data stream on the first subcarrier and transmits the second higher-order modulated data stream on the second subcarrier. Because the first high-order modulated data stream and the second high-order modulated data stream both comprise the first low-order modulated data stream and the second low-order modulated data stream, and are respectively transmitted by different network devices on the first subcarrier and the second subcarrier, the first low-order modulated data stream and the second low-order modulated data stream both realize frequency diversity and space diversity, and similarly, the third low-order modulated data stream and the fourth low-order modulated data stream both realize frequency diversity and space diversity, thereby greatly improving the system performance compared with a transmission mode which only adopts space diversity.
In the embodiment of the present invention, the transmission mode of whether the first to fourth higher-order modulated data streams adopt the cooperative dual carrier modulation may be predetermined, or may be determined by adopting a signaling mode.
For example, the first network device may transmit downlink control information, where the downlink control information may include a first indication, and the first indication is used to indicate whether the first to fourth higher-order modulated data streams adopt the transmission manner of the cooperative dual carrier modulation.
In this embodiment of the present invention, the first low-order modulation data stream to the fourth low-order modulation data stream may be all data streams of the first terminal device, or may be data streams of two terminal devices. The two terminal devices may be a first terminal device and a second terminal device. For example, when the first to fourth low-order modulated data streams are data streams of two terminal devices, the first low-order modulated data stream and the second low-order modulated data stream are data streams of the first terminal device, and the third low-order modulated data stream and the fourth low-order modulated data stream are data streams of the second terminal device; or, the first low-order modulated data stream and the third low-order modulated data stream are data streams of the first terminal device, and the second low-order modulated data stream and the fourth low-order modulated data stream are data streams of the second terminal device. In this way, the data streams of the first terminal device and the second terminal device can be transmitted on different subcarriers by different network devices, thereby realizing space diversity and frequency diversity and improving the performance of the system.
In the embodiment of the present invention, whether the first low-order modulation data stream to the fourth low-order modulation data stream are data streams of the first terminal device or data streams of two terminal devices may be notified to the terminal devices by a predetermined manner, an implicit indication manner or an explicit indication manner. In particular, reference may be made to the statements related to the above first aspect, which are not described in detail here.
In an alternative embodiment, when the first to fourth low-order modulated data streams are data streams obtained by using binary phase shift keying modulation BPSK, the first to fourth high-order modulated data streams are data streams obtained by using quadrature phase shift keying modulation QPSK. The specific optional matrices of the first matrix and the second matrix may refer to the content of the first aspect, and are not described in detail here.
In another alternative embodiment, when the first to fourth low-order modulated data streams are data streams obtained by quadrature phase shift keying QPSK modulation, the first to fourth high-order modulated data streams are data streams obtained by 16QAM using 16 QAM; the matrix that is specifically selectable for both the first matrix and the second matrix may refer to the content described in the above first aspect, and is not described in detail here.
In a third aspect, the present application further provides a data communication apparatus based on dual carrier modulation, where the data communication apparatus has a function of implementing the first terminal device in the foregoing method embodiment, and the function may be implemented by hardware, or may be implemented by hardware executing corresponding software. The hardware or software includes one or more templates corresponding to the above-described functions.
In one possible design, the data communication apparatus is applied to a terminal device, and may include a processor and a transceiver, for example, applied to a first terminal device, and the processor is configured to support the first terminal device to perform the corresponding functions in the method. The transceiver is used for supporting communication between the data communication device and the network equipment, and receiving the data stream, the downlink control information and the like involved in the method. The data communication device may also include a memory for coupling to the processor for storing program instructions and data necessary for the data communication device.
In another possible design, the data communication apparatus is applied to a terminal device, and may include a demodulation module, a receiving module, and the like, for example, applied to a first terminal device, and configured to perform corresponding functions of the first terminal device in the above method. For example, the receiving module is configured to receive, on a first subcarrier, a first high-order modulated data stream sent by a first network device and a third high-order modulated data stream sent by a second network device, respectively; receiving a second high-order modulation data stream sent by the second network device and a fourth high-order modulation data stream sent by the first network device on a second subcarrier respectively; a demodulation module, configured to demodulate the first high-order modulated data stream to the fourth high-order modulated data stream by using the first matrix and the second matrix, so as to obtain a data stream of the first terminal device.
In a fourth aspect, an embodiment of the present application further provides a data communication apparatus based on dual carrier modulation, where the data communication apparatus is applied in a network device, for example, in a first network device, and the data communication apparatus has a function of implementing the first network device in the foregoing method embodiment, where the function may be implemented by hardware, or may be implemented by hardware executing corresponding software. The hardware or software includes one or more templates corresponding to the above-described functions.
In one possible design, the data communication apparatus is applied to a network device and may include a processor and a transceiver, where, for example, the processor is applied to a first network device and is configured to support the first network device to perform the corresponding functions in the above method. The transceiver is used for supporting communication between the data communication device and the terminal equipment, and transmitting the data stream, the downlink control information and the like related in the method. The data communication device may also include a memory for coupling to the processor for storing program instructions and data necessary for the data communication device.
In another possible design, the data communication apparatus is applied to a network device, and may include a determining module, a sending module, and the like, for example, applied to a first network device, and configured to perform corresponding functions of the first network device in the above method. For example, the apparatus may include a determining module configured to determine a first high order modulated data stream to a fourth high order modulated data stream, a transmitting module configured to transmit the first high order modulated data stream on a first subcarrier, transmit the fourth high order modulated data stream on a second subcarrier, and so on.
In a fifth aspect, the present invention provides a communication system, where the system includes data communication apparatuses corresponding to at least two network devices in the above aspects, and data communication apparatuses corresponding to at least one terminal device, for example, the system may include two base stations and at least one terminal device in cellular communication; still alternatively, the system may include two access points AP and at least one terminal device in WIFI.
In a sixth aspect, an embodiment of the present application provides a computer-readable storage medium, where a computer program for the network device or the terminal device is stored in the computer-readable storage medium, where the computer program includes at least one code, and the at least one code is executable by a computer to control the computer to execute a program designed to operate the above aspects.
In a seventh aspect, an embodiment of the present application provides a computer program, which is configured to, when executed by a computer, perform the steps performed by the first terminal device or the first network device in the above first aspect. The computer program may be stored in whole or in part on a storage medium packaged with the processor, or in part or in whole on a memory not packaged with the processor.
In an eighth aspect, embodiments of the present application further provide a processor, where the processor includes at least one circuit configured to demodulate first to fourth higher order modulated data streams, and the processor further includes at least one circuit configured to receive the first to fourth higher order modulated data streams. The processor may be a chip, and may execute instructions or programs for implementing the functions related to the first terminal device or the second terminal device.
In a ninth aspect, this embodiment of the present application further provides another processor, where the processor includes at least one circuit configured to determine first to fourth higher-order modulated data streams, and the processor further includes at least one circuit configured to transmit the first and fourth higher-order modulated data streams, or to transmit the second and third higher-order modulated data streams. The processor may be a chip, and may execute instructions or programs for implementing the functions related to the first network device or the second network device.
In a tenth aspect, an embodiment of the present application further provides a chip system, where the chip system includes a processor, for example, where the processor is applied in a first terminal device or a first network device, and is configured to implement the functions related in the foregoing aspects, for example, to generate or process data and/or information related in the foregoing method. In one possible design, the system-on-chip further includes a memory for storing program instructions and data necessary to implement the functions of the first terminal device or the first network device. The chip system may be formed by a chip, or may include a chip and other discrete devices.
Drawings
Fig. 1A is a schematic structural diagram of a communication system according to an embodiment of the present application;
fig. 1B is a schematic structural diagram of a communication system according to an embodiment of the present application;
fig. 2A is a schematic diagram of a transmission method according to an embodiment of the present disclosure;
fig. 2B is a schematic diagram of another transmission method according to an embodiment of the present disclosure;
fig. 2C is a schematic diagram of another transmission method according to an embodiment of the present application;
fig. 3 is a schematic flowchart of a data communication method based on dual carrier modulation according to an embodiment of the present application;
fig. 4 is a schematic flowchart of another data communication method based on dual carrier modulation according to an embodiment of the present application;
fig. 5 is a schematic structural diagram of a data communication apparatus based on dual carrier modulation according to an embodiment of the present application;
fig. 6 is a schematic structural diagram of another data communication apparatus based on dual carrier modulation according to an embodiment of the present application;
fig. 7 is a schematic structural diagram of a network device according to an embodiment of the present application;
fig. 8 is a schematic structural diagram of a terminal device according to an embodiment of the present application.
Detailed Description
The terminology used in the description of the embodiments section of the present application is for the purpose of describing particular embodiments of the present application only and is not intended to be limiting of the present application.
In order to further improve the system performance in the communication system, the embodiment of the present application provides a data communication method based on dual carrier modulation based on the communication system shown in fig. 1A or fig. 1B, so as to further improve the system performance. As shown in fig. 1A and fig. 1B, the communication system provided in the embodiment of the present application may include at least two sending nodes and one receiving node. In the communication system shown in fig. 1A, two sending nodes send data to one receiving node in parallel; in the communication system shown in fig. 1B, two transmitting nodes transmit data in parallel for two receiving nodes.
In the embodiment of the present application, the communication System may be a Radio Access Technology (RAT) System, such as wifi or cellular communication System, and may also be a Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), frequency Division Multiple Access (frequency Division Multiple Access, FDMA), orthogonal frequency Division Multiple Access (orthogonal frequency Division Multiple Access, OFDMA), Wideband Code Division Multiple Access (WCDMA), Time Division-Synchronous Code Division Multiple Access (TD-SCDMA), Universal mobile telecommunications System (Universal mobile telecommunications System, UMTS), Long Term Evolution (UMTS), LTE, etc., and may also be developed as a New LTE System, such as a Radio Access network (LTE) System, or may be used in device to device (D2D) systems, machine to machine (M2M) systems, and so forth. The term "system" may be used interchangeably with "network". In addition, the system architecture and the service scenario described in the embodiment of the present application are for more clearly illustrating the technical solution of the embodiment of the present application, and do not constitute a limitation to the technical solution provided in the embodiment of the present application, and as a person of ordinary skill in the art knows that along with the evolution of the network architecture and the appearance of a new service scenario, the technical solution provided in the embodiment of the present invention is also applicable to similar technical problems.
In this embodiment, the sending node in fig. 1A and fig. 1B is a device deployed in a wireless access network to provide a wireless communication function for a receiving node, and for example, may be an Access Point (AP) in WiFi or a base station in cellular communication. In addition, in this embodiment, a sending node is referred to as a network device, and the network device may be an entity used for sending or receiving information on a network side, for example, the network device may be a base station, a Transmission Point (TP), a Transmission and Reception Point (TRP), a relay device, or other network devices having a function of a base station, and the application is not limited. In fig. 1A and 1B, the sending node 1 is referred to as a first network device and is denoted as NE1, and the sending node 2 is referred to as a second network device and is denoted as NE2, where NE1 and NE2 may be different types of network devices or may be the same type of network devices.
Accordingly, the receiving node in fig. 1A and 1B is a communication device with a wireless transceiving function, and may be an entity that receives information, or may also be an entity that transmits and receives information, for example, the receiving node may be a WiFi-enabled station or a cellular communication-enabled device, such as a handheld device, a vehicle-mounted device, a wearable device, a computing device or other processing device connected to a wireless modem, and the like, which have a wireless communication function. The terminal devices in different networks may be called different names, for example: terminal equipment (terminal), User Equipment (UE), mobile station, subscriber unit, Relay (Relay), station, cellular telephone, personal digital assistant, wireless modem, wireless communication device, handheld device, laptop computer, cordless telephone, wireless local loop station, etc. In the embodiment of the present application, the receiving node 1 in fig. 1A is referred to as a first terminal device, which is denoted as TM1, and the receiving node 2 in fig. 1B is referred to as a second terminal device, which is denoted as TM 2.
In the scheme provided by the embodiment of the application, the first network device and the second network device can cooperate to transmit data on different subcarriers as the first terminal device, or the first terminal device and the second terminal device, so that space diversity and frequency diversity are realized, system performance can be greatly improved, and compared with the case that a single network device transmits data to a first terminal device in a dual-carrier modulation mode, transmission efficiency is improved.
Among them, Dual Carrier Modulation (DCM) is a method for improving transmission performance by using frequency diversity, as shown in fig. 2A to 2C, and low-order Modulation data stream s to be transmitted11、s12Combined to form a signal x11＝α11s11+β11s12，x12＝α12s11+β12s12The first subcarrier and the second subcarrier can be respectively sent out to achieve the effect of frequency diversity, and it can be understood that the first subcarrier and the second subcarrier are different; similarly, a low-order modulated data stream s to be transmitted21，s22Signals y that can be generated after combination11＝α21s21+β21s22，y12＝α22s21+β22s22The method can be respectively sent out on the first subcarrier and the second subcarrier so as to achieve the effect of frequency diversity. Wherein, in the dual carrier modulation mode,(s)11、s12) And (x)11，x12)，(s21，s22) And (y)11，y12) Are all points on a typical constellation diagram, as described below for the optional low order modulated data stream and the high order modulated data stream.
This scheme is explained in further detail below with reference to the accompanying drawings.
In the embodiment of the present application, in the communication systems shown in fig. 1A and 1B, the first terminal device may be in the first subcarrier f1Respectively receiving a first high-order modulated data stream x sent by a first network device11And a third high-order modulated data stream y transmitted by the second network device11In the second subcarrier f2Respectively receiving a fourth high-order modulated data stream y sent by the first network device12And a second high-order modulated data stream x transmitted by a second network device12For example, as shown in fig. 2A, fig. 2A is a schematic diagram of data communication based on dual carrier modulation according to an embodiment of the present application, wherein the higher order modulated data stream may be a combination of multiple lower order modulated data streams, such as a first higher order modulated data stream x11And a second higher order modulated data stream x12Is modulated by a first low order data stream s11And a second low order modulated data stream s12Based on a first matrix Q1Obtained, third, high-order modulated data stream y11And a fourth higher order modulated data stream y12Is modulated by a third low order data stream s21And a fourth low order modulated data stream s22Based on a second matrix Q2And (4) obtaining the product.
It can be seen that, since the first high-order modulated data stream and the second high-order modulated data stream both include the first low-order modulated data stream and the second low-order modulated data stream, and are respectively transmitted on the first subcarrier and the second subcarrier by different network devices, the first low-order modulated data stream and the second low-order modulated data stream serving as transmission signals both achieve frequency diversity and spatial diversity, and similarly, the third low-order modulated data stream and the fourth low-order modulated data stream serving as transmission signals both achieve frequency diversity and spatial diversity, thereby greatly improving system performance.
Wherein the first matrix Q1And a second matrix Q2May be the same or different matrices, the first matrix Q1And a second matrix Q2The terminal device may be notified by the network device. For example, the network device may inform the terminal device through the downlink control information that the high order modulated data stream is obtained by modulating the low order modulated data stream based on what matrix.
For example, assume a first matrix Q1And a second matrix Q2Respectively as follows:
Figure BDA0001835454630000071
the first higher order modulated data stream x11And a second higher order modulated data stream x12Are each modulated by a first low order data stream s11And a second low order modulated data stream s12Based on a first matrix Q1Obtaining, a third, higher order modulated data stream y11And a fourth higher order modulated data stream y12Are each modulated by a third low order data stream s21And a fourth low order modulated data stream s22Based on a second matrix Q2Obtained, can be respectively:
Figure BDA0001835454630000081
in an alternative embodiment, the first to fourth low-order modulated data streams may be data streams obtained by Binary Phase Shift Keying (BPSK) modulation, and the first to fourth high-order modulated data streams may be data streams obtained by Quadrature Phase Shift Keying (QPSK) modulation. Wherein the first matrix and the second matrix are each one of the following Q:
Figure BDA0001835454630000082
Figure BDA0001835454630000083
Figure BDA0001835454630000084
Figure BDA0001835454630000085
in another optional embodiment, when the first to fourth low-order modulated data streams are data streams obtained by Quadrature phase shift keying QPSK Modulation, the first to fourth high-order modulated data streams are data streams obtained by 16Quadrature Amplitude Modulation (16 QAM). Wherein the first matrix and the second matrix are each one of the following Q:
Figure BDA0001835454630000086
Figure BDA0001835454630000087
Figure BDA0001835454630000088
Figure BDA0001835454630000089
in the embodiment of the application, whether a transmission mode of cooperative dual carrier modulation is adopted between the terminal device and the network device may be predetermined, or may be flexibly notified by signaling. The transmission mode of cooperative dual carrier modulation is to transmit the data stream of the terminal device by adopting the multi-network device cooperation and dual carrier modulation modes, so as to realize space diversity and frequency diversity.
In an optional example, the terminal device and the network device may interact with downlink control information, where the downlink control information may include a first indication, and the first indication is used to indicate whether the first high-order modulation data stream to the fourth high-order modulation data stream adopt a transmission manner of cooperative dual carrier modulation.
In an optional implementation manner, the first low-order modulated data stream to the fourth low-order modulated data stream are all data streams of the first terminal device. For example, for the communication system of FIG. 1A, two transmitting nodes transmit data for one receiving node, as shown in FIG. 2A, s11、s12、s21、s22Are each a transmission signal or data stream to be transmitted to the first terminal device, where s11For a first low-order modulated data stream, s12Second low order modulated data stream, s21A third low-order modulated data stream,s22a fourth low order modulated data stream denoted as(s)11，s12，s21，s22)TM1I.e.(s)11，s12，s21，s22)TM1Denotes s11，s12，s21，s22Are data streams or signals to be sent to the first terminal device.
In addition, x11And x12Is based on s11，s12Obtained by a reaction of a compound of formula (I) wherein x11For modulating the data stream for the first higher order x12For modulating the data stream for the second higher order, i.e. denoted x11＝(s11，s12)，x12＝(s11，s12)；y11And y12Is based on s21，s22Obtained wherein y is11For the third, higher order modulated data stream, y12For modulating the data stream of the fourth higher order, i.e. y11＝(s21，s22)，y12＝(s21，s22). For example, x11＝(s11，s12)＝α11s11+β11s12，x12＝(s11，s12)＝α12s11+β12s12，y11＝(s21，s22)＝α21s21+β21s22，y12＝(s21，s22)＝α22s21+β22s22Thus, s11、s12、s21、s22Are both transmission signals or data streams to be transmitted to the first terminal device, which may also be denoted as (x)11，x12，y11，y12)TM1I.e. (x)11，x12，y11，y12)TM1Denotes x11，x12，y11，y12Are data streams or signals to be sent to the first terminal device.
It can be seen that, in the transmission mode shown in FIG. 2A, each transmission signal s is transmitted11、s12、s21、s22All the signals can be transmitted by different network devices on different subcarriers, thereby realizing space diversity and frequency diversity and improving the system performance.
In another optional implementation, the first low-order modulated data stream to the fourth low-order modulated data stream are data streams of two terminal devices, where the two terminal devices include a first terminal device and a second terminal device, and are denoted as(s)11，s12，s21，s22)(TM1，TM2)。
In a possible design, the first low-order modulated data stream and the second low-order modulated data stream are data streams of the first terminal device, and the third low-order modulated data stream and the fourth low-order modulated data stream are data streams of the second terminal device, as shown in fig. 2B, and are denoted as(s)11，s12)TM1，(s21，s22)TM2Similarly, it can also be written as (x)11，x12)TM1，(y11，y12)TM2(ii) a As can be seen, in this embodiment, the same high-order modulated data stream only includes a low-order modulated data stream of one terminal device, and therefore, the corresponding relationship may also be defined as: the first to second high-order modulated data streams are data streams of one terminal device, and the third and fourth high-order modulated data streams are data streams of another terminal device. Optionally, when obtaining the own data stream, TM1 and TM2 can directly separate (x) according to the high-order modulated data stream without demodulating to obtain the low-order modulated data stream11，x12)TM1，(y11，y12)TM2And the expense of the terminal equipment is saved. It is understood that TM1 and TM2 may also obtain their own low-order data stream after obtaining the low-order modulated data stream by demodulation.
In another possible design, the first low-order modulated data stream and the third low-order modulated data stream are data streams of the first terminal device, and the second low-order modulated data stream and the fourth low-order modulated data stream are data streams of the second terminal device, such asShown in FIG. 2C as(s)11，s21)TM1，(s12，s22)TM2In this embodiment, each higher-order modulated data stream includes lower-order modulated data streams of two terminal devices, so TM1 and TM2 need to demodulate the lower-order modulated data stream from the received higher-order modulated data stream before distinguishing their own data streams.
In this embodiment of the present application, explicit or implicit manners may be adopted to determine a correspondence between the first to fourth low-order modulated data streams and the terminal device, where the correspondence is used to determine the terminal devices to which the first to fourth low-order modulated data streams belong respectively. Based on the explicit or implicit indication manner, the terminal device may determine which of the first to fourth low-order modulated data streams are data streams belonging to itself and which are not data streams belonging to itself. Further, optionally, the terminal device may analyze or process the data stream belonging to itself, but not process the data stream not belonging to itself, so as to improve the processing efficiency of the receiving end and save the processing resource of the receiving end.
The explicit or implicit indication manner can be applied to the case where two network devices transmit data in parallel as two terminal devices, for example, the transmission manner shown in fig. 2B and fig. 2C.
For example, the step of agreeing correspondence between the first to fourth low-order modulation data streams and the two terminal devices includes: {(s)11，s12)TM1，(s21，s22)TM2And {(s) }, and11，s21)TM1，(s12，s22)TM2then the second indication may be a bit with an indicator of 1,0, the corresponding relationship indicated by the indicator 1 being {(s)11，s12)TM1，(s21，s22)TM2The corresponding relation indicated by the indication value 0 is {(s)11，s21)TM1，(s12，s22)TM2Therefore, the terminal device may determine the first to fourth low-order modulation data streams according to the indication value of the second indication in the downlink control information, respectivelyThe terminal equipment. For example, when the determined value of the second indication is 1, the first terminal device determines that the correspondence between the first to fourth low-order modulated data streams and the terminal device is {(s)11，s12)TM1，(s21，s22)TM2Then the first terminal device may only parse or process s11And s12Without processing s21And s22Alternatively, the first terminal device may only parse or process the inclusion(s)11，s12) Of higher order modulated data streams, e.g., (x)11，x12)TM1。
Optionally, the correspondence between the first to fourth low-order modulated data streams and the terminal device may also be other correspondence, for example, {(s)11，s12)TM2，(s21，s22)TM1}，{(s11，s21)TM2，(s12，s22)TM1And the terminal device and the network device may agree in advance about the optional correspondence under the cooperative dual carrier modulation condition, and an association indication relationship between an indication value of the second indication and the correspondence, where, in one possible example, the bit number of the second indication is related to the number of types of the indicated correspondence.
In another possible implementation, the second indication information may include 2 sub-indications, each sub-indication corresponding to one of the two terminal devices, and being used to indicate which of the first to fourth low-order modulated data streams belong to the terminal device to which the sub-indication corresponds. The sub-indication corresponding to each terminal device may include a bitmap, where the bitmap includes 4 bits, each of the bits corresponds to one of the first to fourth low-order modulated data streams, and is used to indicate whether the data stream corresponding to the bit belongs to the terminal device, for example, a value of the bit is 1 indicates that the data stream belongs to the terminal device, and a value of the bit is 0 indicates that the data stream does not belong to the terminal device. For example, the first sub-indicator corresponds to TM1, and a value of 1100 may indicate that the first and second low-order modulated data streams belong to TM 1; a value of 1010 may indicate that the first and third low-order data streams belong to TM 1; similarly, the second sub-indicator corresponds to TM2, and a value of 0011 may indicate that the third and fourth low-order data streams belong to TM 2; a value of 0101 may indicate that the second and fourth lower order data streams belong to TM 2.
In another possible implementation, the corresponding relationship between the first to fourth low-order modulated data streams and the two terminal devices is determined in an implicit manner, and the downlink control information further includes: the identifiers of the two terminal devices, the sequence of the identifiers of the two terminal devices in the downlink control information is used for indicating the corresponding relationship between the first low-order modulated data stream to the fourth low-order modulated data stream obtained by the terminal device and each of the two terminal devices; the corresponding relationship is used for determining terminal devices to which the first low-order modulation data stream to the fourth low-order modulation data stream respectively belong. Optionally, the identifier of the terminal device may be an Association Identifier (AID) of the terminal device, or an MAC address.
For example, two network devices and two terminal devices agree on the forward sequence of the identifiers of two terminal devices in the downlink control information and(s)11，s12)，(s21，s22) So that, assuming that the first terminal device and the second terminal device determine that the order of the identities of the two terminal devices in the downlink control information is (TM1, TM2), the first terminal device and the second terminal device can determine(s)11，s12)TM1，(s21，s22)TM2(ii) a Assuming that the first terminal device and the second terminal device determine that the order of the identities of the two terminal devices in the downlink control information is (TM2, TM1), the first terminal device and the second terminal device may determine(s)11，s12)TM2，(s21，s22)TM1.
For another example, two network devices and two terminal devices agree on the forward sequence and(s) of the identifiers of two terminal devices in the downlink control information11，s21)，(s12，s22) So that it is assumed that the first terminal device and the second terminal device doDetermining the sequence of the identifiers of the two terminal devices in the downlink control information as (TM1, TM2), the first terminal device and the second terminal device can determine(s)11，s21)TM1，(s12，s22)TM2(ii) a Assuming that the first terminal device and the second terminal device determine that the order of the identities of the two terminal devices in the downlink control information is (TM2, TM1), the first terminal device and the second terminal device may determine(s)11，s21)TM2，(s12，s22)TM1。
For another example, two network devices and two terminal devices agree on the reverse order of the identifiers of two terminal devices in the downlink control information and(s)11，s12)，(s21，s22) So that, assuming that the first terminal device and the second terminal device determine that the order of the identities of the two terminal devices in the downlink control information is (TM1, TM2), the first terminal device and the second terminal device can determine(s)11，s12)TM2，(s21，s22)TM1(ii) a Assuming that the first terminal device and the second terminal device determine that the order of the identities of the two terminal devices in the downlink control information is (TM2, TM1), the first terminal device and the second terminal device may determine(s)11，s12)TM1，(s21，s22)TM2。
For another example, two network devices and two terminal devices agree on the reverse order of the identifiers of two terminal devices in the downlink control information and(s)11，s21)，(s12，s22) So that, assuming that the first terminal device and the second terminal device determine that the order of the identities of the two terminal devices in the downlink control information is (TM1, TM2), the first terminal device and the second terminal device can determine(s)11，s21)TM2，(s12，s22)TM1(ii) a Assuming that the first terminal device and the second terminal device determine that the order of the identities of the two terminal devices in the downlink control information is (TM2, TM1), the first terminal device and the second terminal device may be configured toDetermining(s)11，s21)TM1，(s12，s22)TM2。
In the embodiment of the present application, the correspondence between the first to fourth low-order modulated data streams and the terminal device may include, but is not limited to, the following three types: 1. the first to fourth low-order modulated data streams belong to a terminal device, such as the transmission scheme shown in fig. 2A; 2. the first to fourth low-order modulated data streams belong to two terminal devices, for example, the first and second low-order modulated data streams belong to one terminal device, and the third and fourth low-order modulated data streams belong to one terminal device, as shown in fig. 2B, the transmission mode is shown; alternatively, the first and third low-order modulated data streams belong to a terminal device, and the second and fourth low-order modulated data streams belong to a terminal device, as shown in fig. 2C. Further, for the correspondence relationship of class 2, the terminal devices to which the first to fourth low-order modulation data streams belong may be further determined with reference to the second indication and the sequence of the terminal device identifiers in the downlink control information described in the foregoing embodiment.
In an optional implementation manner, the network device and the terminal device may notify the terminal device in an agreed manner, and the network device performs data transmission using which of the two types of correspondence.
In another optional implementation manner, the downlink control information may include a third indication, where the third indication is used to indicate one of the three types of corresponding relationships. For example, the third indication may comprise 1 bit indication bit, and the "different values" of the third indication are agreed to indicate one of the two types of correspondence relationships. When the terminal device determines that the correspondence is type 2 according to the value of the third indication, the terminal device to which the first to fourth low-order modulation data streams specifically belong may be determined according to the second indication in the downlink control information or the order of the identifiers of the terminal devices in the downlink control information.
For example, if the third indication is 0, the 1 st type correspondence is indicated; when the third indication is 1, indicating the type 2 correspondence, and after receiving the downlink control information, the terminal device may be configured to perform the following stepsThe type 2 corresponding relation indicated by the third indicated value being 1, and the corresponding relation indicated by the second indicated value being 0 is {(s)11，s21)TM1，(s12，s22)TM2}。
In another possible implementation manner, the network device uses which of the two types of correspondence relationships to perform data transmission, which may be determined according to the number of the identifiers of the terminal devices in the downlink control information. For example, if the downlink control information includes the first indication and includes an identifier of the terminal device, it indicates that the type 1 correspondence is adopted; the downlink control information includes a first indication, and the downlink control information includes the identifiers of the two terminal devices, which indicates that the 2 nd-type corresponding relationship is adopted.
In yet another possible implementation, the downlink control information includes a fourth indication, where the fourth indication is used to indicate whether the first to fourth low-order modulated data streams belong to one terminal device or belong to various specific corresponding relationships related to two terminal devices. For example,(s)11，s12，s21，s22)(TM1，TM2)、{(s11，s12)TM1，(s21，s22)TM2}、{(s11，s21)TM1，(s12，s22)TM2And the like, in an example, the number of bits of the fourth indication may be related to the number of the corresponding relationship, and different values of the fourth indication correspond to a specific corresponding relationship, that is, the terminal devices to which the first to fourth low-order data streams belong are determined. In this way, the terminal device may determine, according to the first indication and the fourth indication in the downlink control information, that the network device adopts the cooperative dual carrier modulation transmission method, and may determine the terminal devices to which the first to fourth low-order data streams belong.
In the embodiment of the present application, the first and second high order modulated data streams are obtained by modulating the first and second low order modulated data streams with the first matrix, and the third and fourth high order modulated data streams are obtained by modulating the third and fourth low order modulated data streams with the second matrix, so that the first and second high order modulated data streams are obtained by modulating the third and fourth low order modulated data streams with the second matrix, and thus, in the embodiment of the present application, the first and second high order modulated data streams are obtained byIn the type 2 correspondence, if the first and second low-order modulated data streams are both data streams of one terminal device, and the third and fourth low-order modulated data streams are both data streams of another terminal device, the second indication may be further used to indicate the correspondence between the first to fourth high-order modulated data streams and the terminal device. For example {(s) indicated by the second indication11，s12)TM1，(s21，s22)TM2The correspondence may be replaced with an indication { (x)11，x12)TM1，(y11，y12)TM2The correspondence is such that the first terminal TM1 receives y11，y12Then, y can be directly indicated according to the second indication11，y12Discarded, thereby avoiding the processing resources wasted by further demodulation. Similarly, when the terminal device and the network device agree that the first and second low-order modulation data streams are both data streams of one terminal device, and the third and fourth low-order modulation data streams are both data streams of another terminal device, the terminal device may also determine the terminal devices to which the first to fourth high-order modulation data streams belong according to the sequence of the identifiers of the terminal devices in the downlink control information, thereby directly discarding the high-order modulation data streams that do not belong to the terminal device, and saving the processing resources of the terminal device.
In the above description of how the terminal devices to which the first to fourth low-order data streams belong notify the terminal devices, in conjunction with the communication systems shown in fig. 1A and 1B, it is assumed that the terminal devices to which the first to fourth low-order data streams belong include the following three corresponding relationships, and the data communication method based on dual carrier modulation according to the embodiment of the present application is described in detail in conjunction with the three corresponding relationships.
With respect to the communication system shown in fig. 1A, the first to fourth low-order modulated data streams all belong to a data stream of the first terminal device, and as shown in fig. 2A, the data streams sent by the first network device NE1 and the second network device NE2 are all data streams of the first terminal device TM1, which is denoted as(s)11，s12，s21，s22)TM1(ii) a Corresponding relation two, with respect to FIG. 1BIn the illustrated communication system, the first to fourth low-order modulated data streams belong to data streams of two terminal devices, as shown in fig. 2B, the first and second low-order modulated data streams belong to the first terminal device, and the third and fourth low-order modulated data streams belong to the second terminal device, denoted by(s)11，s12)TM1，(s21，s22)TM2(ii) a Corresponding relation three, for the communication system shown in fig. 1B, the first and third low-order modulated data streams are data streams of the first terminal device, and the second and fourth low-order modulated data streams are data streams of the second terminal device, as shown in fig. 2C, and are denoted as(s)11，s21)TM1，(s12，s22)TM2。
With reference to fig. 3 and fig. 4, the data communication method based on dual carrier modulation provided in the embodiment of the present application is described in conjunction with the three optional correspondences.
In the embodiment shown in fig. 3 and 4, NE1 is at f1Up-sending x11NE2 at f1On send y11(ii) a NE1 at f2On send y12NE2 at f2Up-sending x12(ii) a Assuming that NE1, NE2 each have two receiving antennas, the first to fourth high order data streams or signals received by the first terminal device and/or the second terminal device may include:
Figure BDA0001835454630000121
wherein:
Figure BDA0001835454630000122
for receiving antenna n at subcarrier f1To the received signal or signals of the received signal,
Figure BDA0001835454630000123
for receiving antenna n at subcarrier f2An upper received signal;
Figure BDA0001835454630000124
for receiving antenna n from network device NEm to terminal device at subcarrier f1The channel(s) on the channel(s),
Figure BDA0001835454630000125
for receiving antenna n from network device NEm to terminal device at subcarrier f2Where n is 1,2, i.e. respectively representing a receiving antenna 1 and a receiving antenna 2 of the terminal device; m is 1 and 2, i.e. NE1 and NE2, respectively.
In one example, according to the above formula (3), the signal received by the first terminal device and/or the second terminal device can be represented as:
Figure BDA0001835454630000126
further, with the above equations (1) and (2), equation (4) can also be expressed as:
Figure BDA0001835454630000131
it can be seen that, the first terminal device and/or the second terminal device may solve the first to fourth higher-order modulated data streams included in the transmission signals of the first network device and the second network device from the above equation (4), and then solve the first to fourth lower-order modulated data streams, i.e. s, according to equations (1) and (2)11、s12、s21、s22. The first to fourth low-order modulated data streams included in the transmission signals of the first network device and the second network device may also be directly solved according to the formula (5).
Referring to fig. 3, fig. 3 is a flowchart illustrating a data communication method based on dual carrier modulation according to an embodiment of the present application, where the data communication method shown in fig. 3 may be applied to the communication system shown in fig. 1A, and the transmission scheme shown in fig. 2A is that two network devices both transmit data to a terminal device NE1, where a first network device NE1 is capable of transmitting downlink control information for TM1, for example, NE1 may establish Radio Resource Control (RRC) connection with TM1 to transmit the downlink control information. As shown in fig. 3, the data communication method may include the steps of:
301. NE1 and NE2 determine the first to fourth higher order modulated data streams.
Wherein the first high order modulated data stream x11And said second high order modulated data stream x12Are each modulated by a first low-order data stream s11And a second low order modulated data stream s12Obtained based on the first matrix; the third high-order modulated data stream y11And said fourth higher order modulated data stream y12Are each provided with a third low-order modulated data stream s21And a fourth low order modulated data stream s22And obtaining based on the second matrix. For example, the above formula (1) and formula (2) show.
In one possible implementation, NE1 may transmit the determined first to fourth higher order modulated data streams to NE2, so that NE2 may transmit the second and third higher order modulated data to the first terminal device and/or the second terminal device on the second subcarrier and the first subcarrier, respectively.
In another possible implementation, NE1 may send the first to fourth low order modulated data streams to NE2 and inform NE2 of the first matrix and/or the second matrix, so that NE2 can modulate the first and second low order modulated data streams with the first matrix to obtain first and second high order modulated data streams and modulate the third and fourth low order modulated data streams with the second matrix to obtain third and fourth high order modulated data streams.
302. NE1 transmits x on first subcarrier f111Y is sent on a second subcarrier f212(ii) a NE2 transmits y on first subcarrier f111Sending x on a second subcarrier f212；
It can be understood that NE1 and NE2 may also use other manners to interact with data streams that need to be sent to the terminal device, and may also use other manners to negotiate downlink control information, and this application does not specifically limit the manner of network device interaction and negotiation.
Optionally, for the communication systems shown in fig. 1A and fig. 1B, the first network device and the second network device may notify the first terminal device, or the first terminal device and the second terminal device adopt a cooperative dual carrier modulation transmission manner, and therefore, the data communication method may include step 303;
303. NE1 sends downlink control information to TM 1;
the downlink control information includes the first indication as described in the above embodiment to notify TM1 or notify TM1 and TM2 whether the transmission method of cooperative dual carrier modulation is adopted. The downlink control information further includes indication information of the first matrix and/or the second matrix, such that TM1, or TM1 and TM2, determines the first matrix and/or the second matrix, and the first subcarrier and the second subcarrier.
Accordingly, TM1 receives first higher-order modulated data stream x transmitted by the first network device on the first sub-carrier respectively11And a third high-order modulated data stream y transmitted by the second network device11(ii) a Respectively receiving a second high-order modulation data stream x sent by the second network equipment on a second subcarrier12And a fourth higher order modulated data stream y transmitted by said first network device12Step 304 may be performed.
304. TM1 is in the first sub-carrier f according to the downlink control information1X sent by up-receiving NE111In the second subcarrier f2Y sent by up-receiving NE112(ii) a In the first subcarrier f1Y sent by up-receiving NE211In the second subcarrier f2X sent by up-receiving NE212(ii) a And demodulating the first to fourth higher order modulated data streams using the first matrix and the second matrix to obtain a TM1 data stream.
Wherein TM1 finds the first to fourth low order modulated data streams, i.e., s11、s12、s21、s22Can refer to the above formulas (1) to (5), and will not be described in detail here.
In the embodiment of the present application, NE1 may use protocol agreement, implicit indication or explicit indication with TM1The mode of formula indication informs the TM1 which of the three above-mentioned embodiments is adopted for data transmission, so that the TM1 transmits data from s11、s12、s21、s22To determine the data stream belonging to itself.
In the case of implicit indication, the TM1 may be determined according to the number of identifiers of terminal devices in the downlink control information, for example, for the communication system in fig. 1A, the number of identifiers of terminal devices in the downlink control information is 1. If explicitly indicated, TM1 may determine whether the first to fourth low-order modulated data streams belong to a data stream of one terminal device or a data stream of two terminal devices according to a third indication in the downlink control information. For example, if the TM1 determines that the first to fourth low-order modulated data streams are data streams of two terminal devices according to the third indication in the downlink control information, the terminal device to which each low-order modulated data stream belongs may be further determined according to the second indication in the downlink control information or the order of the identifiers of the terminal devices in the downlink control information. Various implementations of protocol conventions, implicit or explicit indications have been described in detail in the foregoing embodiments and are not described in detail herein.
For example, in the communication system shown in fig. 1A, TM1 determines that the first to fourth low-order modulated data streams all belong to its own data stream according to the convention or the downlink control information, so in step 304, TM1 finds the first to fourth low-order modulated data streams, i.e., s, using equation (4)11、s12、s21、s22And are both TM1 data streams.
It should be noted that the execution order of the steps described in the embodiment of the present application is not exclusive, for example, the steps 302 and 303 may be performed in parallel on different frequency domain resources. Step 303 may also be before step 301 or step 302, that is, NE1 may send downlink control information first, and then send a data stream; the downlink control information sent in step 303 may also be carried in the same data unit with the data stream sent in step 302, and sent to the terminal device.
In one example, step 303 is also not included. For example, a first network device and a first network deviceThe terminal device adopts a protocol agreed mode, that is, the data stream received by the first terminal device by default is the data stream sent to the first terminal device by two network devices in a dual carrier modulation mode, and the first network device may not send the downlink control information. Then step 303 may not be included in the procedure, and then step 304 is that the terminal device is in the first sub-carrier f1X sent by up-receiving NE111In the second subcarrier f2Y sent by up-receiving NE112(ii) a In the first subcarrier f1Y sent by up-receiving NE211In the second subcarrier f2X sent by up-receiving NE212(ii) a And demodulating the first to fourth higher order modulated data streams using the first matrix and the second matrix to obtain a TM1 data stream.
Referring to fig. 4, fig. 4 is a flowchart illustrating another data communication method based on dual carrier modulation according to an embodiment of the present application, where the data communication method shown in fig. 4 may be applied to the communication system shown in fig. 1B, and the transmission manners shown in fig. 2B and fig. 2C may be adopted, that is, two network devices (i.e., NE1 and NE2) transmit data for two terminal devices (i.e., TM1 and TM2) in parallel, and accordingly, the data transmitted by the two network devices both include data of the two terminal devices. Wherein NE1 can transmit downlink control information for TM1, and NE2 can transmit downlink control information for TM 2.
Among them, the data communication method shown in fig. 4 is different from the data communication method shown in fig. 3 in that,
step 303 further comprises: NE2 sends downlink control information to TM 2;
step 304 further comprises: TM2 receives x transmitted by NE1 on the first sub-carrier f1 according to the downlink control information11Y transmitted by NE1 is received on a second subcarrier f212(ii) a Receiving y transmitted by NE2 on a first subcarrier f111Receiving x transmitted by NE2 on a second subcarrier f212(ii) a And demodulating the first to fourth higher order modulated data streams using the first matrix and the second matrix to obtain a TM2 data stream.
Wherein TM2 obtains s11、s12、s21、s22Reference may be made to the explanations of the above formulas (1) to (5), and details thereof are not described here.
In regard to the correspondence between the first to fourth low-order modulated data streams and the terminal device according to the first to third embodiments, if a pre-agreed notification method is adopted, the TM1 and the TM2 may determine the respective data streams according to the agreed correspondence during the step 304. If the third indication and the second indication in the downlink control information in the above embodiment are adopted, the TM1 and the TM2 may determine their respective data streams according to the values of the third indication and the second indication in the downlink control information during the step 304. If the third indication in the downlink control information and the sequence of the terminal device identifier in the downlink control information are adopted in the above embodiment, the TM1 and the TM2 may determine the data streams according to the sequence of the third indication in the downlink control information and the terminal device identifier in the downlink control information during the step 304. If the fourth indication manner in the downlink control information in the above embodiment is adopted, the TM1 and the TM2 may determine the data streams according to the value of the fourth indication manner in the downlink control information during the step 304.
TM1 and TM2 respectively determine that the first and second low-order modulated data streams belong to a TM1 data stream according to their received downlink control information or convention, and when the third and fourth low-order modulated data streams belong to a TM2 data stream, that is, in the transmission mode shown in fig. 2B, TM1 may drop the third and fourth low-order modulated data streams, and TM2 may drop the first and second low-order modulated data streams.
Since the first and second higher order modulated data streams each comprise first and second lower order modulated data streams, the third and fourth higher order modulated data streams each comprise third and fourth lower order modulated data streams, in one possible embodiment, therefore, TM1 and TM2 may also be used to demodulate the first through fourth higher order modulated data streams, when it is determined that the first and second low-order modulated data streams belong to the TM1 data stream, and the third and fourth low-order modulated data streams belong to the TM2 data stream according to the downlink control information or convention received by itself, in step 304, TM1 may directly discard the third and fourth higher-order modulated data streams and demodulate only the received first and second higher-order modulated data streams, and similarly, TM2 may directly discard the first and second higher-order modulated data streams and demodulate only the received third and fourth higher-order modulated data streams, thereby saving processing resources of the terminal device.
It should be noted that, in an example, one of the two network devices that cooperate with each other may also send the downlink control information to the two terminal devices; similarly, step 303 may also be before step 301 or step 302, that is, the network device may transmit the downlink control information first and then transmit the data stream; the downlink control information sent in step 303 may also be carried in the same data unit with the data stream sent in step 302, and sent to the terminal device. In one example, step 303 is also not included. For example, if the network device and the terminal device adopt a protocol agreed mode, that is, the data stream received by the terminal device by default is the data stream sent to the two terminal devices by the two network devices in a dual carrier modulation mode, and s is defaulted by default11And s12Data stream, s, for TM121And s22For TM2 data flow, the network device may not send the downlink control information. Then step 303 may not be included in the procedure, and then step 304 is that the terminal device is in the first sub-carrier f1X sent by up-receiving NE111In the second subcarrier f2Y sent by up-receiving NE112(ii) a In the first subcarrier f1Y sent by up-receiving NE211In the second subcarrier f2X sent by up-receiving NE212(ii) a And demodulating the first to fourth higher order modulated data streams using the first matrix and the second matrix to obtain a TM1 data stream.
Referring to fig. 5, fig. 5 is a schematic structural diagram of a data communication apparatus according to an embodiment of the present application, where the data communication apparatus shown in fig. 5 may be applied to a first terminal device or a second terminal device in the foregoing method embodiment, and may be the terminal device, or may be a chip in the terminal device. The data communication device is taken as the first terminal device or a chip in the first terminal device as an example for explanation in the embodiment of the present application. As shown in fig. 5, the data communication apparatus may include:
a receiving module 501, configured to receive, on a first subcarrier, a first higher-order modulated data stream x11 sent by a first network device and a third higher-order modulated data stream y11 sent by a second network device, respectively; receiving a second high-order modulated data stream x12 sent by the second network device and a fourth high-order modulated data stream y12 sent by the first network device, respectively, on a second subcarrier; for example, the data stream transmitted in step 302 is received. Wherein the first higher order modulated data stream x11 and the second higher order modulated data stream x12 are both obtained by a first lower order modulated data stream S11 and a second lower order modulated data stream S12 based on a first matrix;
the third higher order modulated data stream y11 and the fourth higher order modulated data stream y12 are both obtained based on a second matrix from a third lower order modulated data stream and a fourth lower order modulated data stream;
a demodulating module 502, configured to demodulate the first higher-order modulated data stream to the fourth higher-order modulated data stream by using the first matrix and the second matrix, so as to obtain a data stream of the first terminal device. For example, step 304 is performed.
In this embodiment of the present application, the receiving module 501 is further configured to receive downlink control information, where the downlink control information includes a first indication, and the first indication is used to indicate whether the first to fourth high-order modulated data streams adopt a cooperative dual carrier modulation transmission mode. For example, the downlink control information transmitted in step 303 is received.
Optionally, the data communication apparatus further includes a processing module 503, where the processing module may implement scheduling of the apparatus, processing signaling or information, and the like, for example, the processing module may control the data communication apparatus to receive relevant information, such as first to fourth higher-order modulated data streams, through the receiving module 501, and call the demodulating module 502 to demodulate, so as to obtain a data stream of the first terminal device.
The data communication apparatus may be further configured to perform the processing procedure of the first terminal device or the second terminal device related to fig. 3 and 4, and/or other procedures used in the techniques described herein, such as determining, according to convention, explicit indication or implicit indication, which data stream belongs to the first to fourth low-order modulated data streams. Or, according to the first indication and other indication information in the downlink control information, controlling the receiving module to respectively receive the high-order data streams sent by different network devices on the first subcarrier and the second subcarrier, and so on.
Referring to fig. 6, fig. 6 is a schematic structural diagram of another data communication apparatus provided in the embodiment of the present application, where the data communication apparatus shown in fig. 6 may be applied to the first network device or the second network device in the foregoing method embodiment, and may also be a network device, a chip in the network device, and the like. As shown in fig. 6, the data communication apparatus may include:
a determining module 601, configured to determine a first high-order modulation data stream to a fourth high-order modulation data stream; for example, step 301 is performed.
The first high-order modulation data stream and the second high-order modulation data stream are both obtained by a first low-order modulation data stream and a second low-order modulation data stream based on a first matrix;
the third high-order modulated data stream and the fourth high-order modulated data stream are both obtained by a third low-order modulated data stream and a fourth low-order modulated data stream based on a second matrix;
a sending module 602, configured to send the first higher-order modulated data stream on a first subcarrier, and send the fourth higher-order modulated data stream on a second subcarrier; for example, step 302 is performed.
Wherein the second high-order modulated data stream and the third high-order modulated data stream are transmitted on the second subcarrier and the first subcarrier, respectively, by a cooperating second network device.
In this embodiment of the application, the sending module 602 is further configured to send downlink control information, where the downlink control information includes a first indication, and the first indication is used to indicate whether the first to fourth higher-order modulated data streams adopt a cooperative dual carrier modulation sending manner. For example, step 303 is performed.
Optionally, the data communication apparatus further includes a processing module 603, which is configured to implement processing of control, signaling, or information of the apparatus, scheduling of each module of the apparatus, and the like, where the processing module may invoke the determining module 601 to determine relevant information to be sent by the data communication apparatus, for example, invoke the determining module 601 to determine first to fourth higher-order modulated data streams, and invoke the sending module 602 to send higher-order modulated data streams.
The data communication apparatus may also be configured to perform the processing procedure of the first network device or the second network device as referred to in fig. 3 and 4, and/or other procedures used in the techniques described herein, such as transmitting the first and fourth higher-order modulated data streams or transmitting the second and third higher-order data streams according to convention, explicit indication or implicit indication. Or, the terminal device is informed of the transmission mode of the data stream according to the first indication and other indication information in the downlink control information, and so on.
Fig. 7 is a schematic structural diagram of a terminal device according to an embodiment of the present application. The terminal device may be the first terminal device or the second terminal device in this embodiment. For convenience of explanation, fig. 7 shows only main components of the terminal device. As shown in fig. 7, the terminal device includes a processor, a memory, a control circuit, an antenna, and an input-output device. The processor is mainly configured to process the communication protocol and the communication data, control the entire terminal device, execute a software program, and process data of the software program, for example, to support the terminal device to perform the actions described in the first terminal device or the second terminal device in the related embodiment of the data communication method. The memory is mainly used for storing software programs and data, such as various corresponding relations and the like. The control circuit is mainly used for converting baseband signals and radio frequency signals and processing the radio frequency signals. The control circuit and the antenna together, which may also be called a transceiver, are mainly used for transceiving radio frequency signals in the form of electromagnetic waves. Input and output devices, such as touch screens, display screens, keyboards, etc., are used primarily for receiving data input by a user and for outputting data to the user.
When the terminal device is turned on, the processor can read the software program in the storage unit, interpret and execute the instruction of the software program, and process the data of the software program. When data needs to be sent wirelessly, the processor outputs a baseband signal to the radio frequency circuit after performing baseband processing on the data to be sent, and the radio frequency circuit performs radio frequency processing on the baseband signal and sends the radio frequency signal outwards in the form of electromagnetic waves through the antenna. When data is sent to the terminal equipment, the radio frequency circuit receives radio frequency signals through the antenna, converts the radio frequency signals into baseband signals and outputs the baseband signals to the processor, and the processor converts the baseband signals into the data and processes the data.
Those skilled in the art will appreciate that fig. 7 shows only one memory and processor for ease of illustration. In an actual terminal device, there may be multiple processors and memories. The memory may also be referred to as a storage medium or a storage device, and the like, which is not limited in this respect in the embodiment of the present invention.
As an alternative implementation manner, the processor may include a baseband processor and a central processing unit, where the baseband processor is mainly used to process a communication protocol and communication data, and the central processing unit is mainly used to control the whole terminal device, execute a software program, and process data of the software program. The processor in fig. 7 integrates the functions of the baseband processor and the central processing unit, and those skilled in the art will understand that the baseband processor and the central processing unit may also be independent processors, and are interconnected through a bus or the like. Those skilled in the art will appreciate that the terminal device may include a plurality of baseband processors to accommodate different network formats, the terminal device may include a plurality of central processors to enhance its processing capability, and various components of the terminal device may be connected by various buses. The baseband processor can also be expressed as a baseband processing circuit or a baseband processing chip. The central processing unit can also be expressed as a central processing circuit or a central processing chip. The function of processing the communication protocol and the communication data may be built in the processor, or may be stored in the storage unit in the form of a software program, and the processor executes the software program to realize the baseband processing function.
For example, in the embodiment of the present invention, the antenna and the control circuit having the transceiving function may be regarded as the transceiving unit 701 of the terminal device, and the processor having the processing function may be regarded as the processing unit 702 of the terminal device. As shown in fig. 7, the terminal device includes a transceiving unit 701 and a processing unit 702. A transceiver unit may also be referred to as a transceiver, a transceiving device, etc. Alternatively, a device for implementing a receiving function in the transceiving unit 701 may be regarded as a receiving unit, and a device for implementing a transmitting function in the transceiving unit 701 may be regarded as a transmitting unit, that is, the transceiving unit 701 includes a receiving unit and a transmitting unit, the receiving unit may also be referred to as a receiver, a receiving circuit, and the like, and the transmitting unit may be referred to as a transmitter, a transmitting circuit, and the like.
In this embodiment of the application, the transceiver, that is, the transceiver unit 701, is configured to receive, on a first subcarrier, a first high-order modulated data stream sent by a first network device and a third high-order modulated data stream sent by a second network device, respectively; and receiving a second high-order modulation data stream sent by the second network device and a fourth high-order modulation data stream sent by the first network device on a second subcarrier respectively.
The first high-order modulation data stream 1 and the second high-order modulation data stream are both obtained by a first low-order modulation data stream and a second low-order modulation data stream based on a first matrix; the third high-order modulated data stream and the fourth high-order modulated data stream are both obtained by a third low-order modulated data stream and a fourth low-order modulated data stream based on a second matrix;
a processor, i.e. the processing unit 702, is configured to demodulate the first higher order modulated data stream to the fourth higher order modulated data stream by using the first matrix and the second matrix, so as to obtain a data stream of the first terminal device.
The transceiver, that is, the transceiver unit 701, may further be configured to receive downlink control information, where the downlink control information includes a first indication, and the first indication is used to indicate whether the first to fourth higher-order modulated data streams adopt a cooperative dual carrier modulation transmission mode.
Referring to fig. 8, fig. 8 is a schematic structural diagram of a network device according to an embodiment of the present disclosure, such as a schematic structural diagram of a base station or other access point. As shown in fig. 8. The network device may be the first network device or the second network device in the above method. The network device may include one or more radio frequency circuits such as a far-end radio frequency circuit 840 and one or more baseband circuits (also referred to as digital units, DUs) 830. The radio frequency circuit 840 may be referred to as a transceiver unit, transceiver, transceiving circuit, or transceiver, etc., which may include at least one antenna 850 and the radio frequency circuit 840. The rf circuit 840 is mainly used for transceiving rf signals and converting rf signals to baseband signals. The baseband circuit 830 is mainly used for baseband processing. The rf circuit 840 and the baseband circuit 830 may be physically disposed together or may be physically disposed separately, i.e., distributed base stations. The baseband circuit 830 is mainly used for performing baseband processing functions, such as channel coding, multiplexing, modulation, spreading, and the like.
In an example, the baseband circuit 830 may be formed by one or more boards, and the multiple boards may jointly support a radio access network (e.g., an LTE network) of a single access system, or may respectively support radio access networks of different access systems. The baseband circuit 830 also includes a memory 820 and a processor 810. The memory 820 is used to store the necessary instructions and data. For example, the memory 820 stores the mapping relationships in the above embodiments. The processor 810 is configured to control the network device to perform necessary actions, for example, to control the network device to execute the operation flows of the above method embodiments with respect to the network device. The memory 820 and processor 810 may serve one or more boards. That is, the memory and processor may be provided separately on each board. Multiple boards may share the same memory and processor. In addition, each single board can be provided with necessary circuits.
The circuits or devices may be connected by a bus 860.
A processor 810 configured to determine a first high order modulated data stream to a fourth high order modulated data stream;
the first high-order modulation data stream and the second high-order modulation data stream are both obtained by a first low-order modulation data stream and a second low-order modulation data stream based on a first matrix;
the third high-order modulated data stream and the fourth high-order modulated data stream are both obtained by a third low-order modulated data stream and a fourth low-order modulated data stream based on a second matrix;
a transceiver, i.e., rf circuit 840, configured to transmit the first high-order modulated data stream on a first subcarrier and transmit the fourth high-order modulated data stream on a second subcarrier;
wherein the second high-order modulated data stream and the third high-order modulated data stream are transmitted on the second subcarrier and the first subcarrier, respectively, by a cooperating second network device.
The transceiver is further configured to send downlink control information, where the downlink control information includes a first indication, and the first indication is used to indicate whether the first to fourth higher-order modulated data streams adopt a cooperative dual carrier modulation sending manner.
It should be understood that in the embodiments of the present application, the processor may be a Central Processing Unit (CPU), and the processor may also be other general-purpose processors, Digital Signal Processors (DSP), Application Specific Integrated Circuits (ASIC), Field Programmable Gate Arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, and so on. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The memory may include both read-only memory and random access memory, and provides instructions and data to the processor. The portion of memory may also include non-volatile random access memory.
The bus system may include a power bus, a control bus, a status signal bus, and the like, in addition to the data bus. For clarity of illustration, however, the various buses are labeled as a bus system in the figures.
In implementation, the steps of the above method may be performed by integrated logic circuits of hardware in a processor or instructions in the form of software. The steps of a method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware processor, or may be implemented by a combination of hardware and software modules in a processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in a memory, and a processor reads information in the memory and completes the steps of the method in combination with hardware of the processor. To avoid repetition, it is not described in detail here.
According to the method provided by the embodiment of the present application, the embodiment of the present application further provides a communication system, which includes the aforementioned two network devices and one or more terminal devices.
The apparatus to which embodiments of the present application relate may also be a general purpose processing system, such as that commonly referred to as a chip, including one or more microprocessors that provide processor functionality; and an external memory providing at least a portion of the storage medium, all connected together with other supporting circuitry through an external bus architecture.
It should also be understood that reference herein to first, second, third, fourth, and various numerical designations is made merely for convenience in description and is not intended to limit the scope of embodiments of the invention.
It should be understood that, in the various embodiments of the present application, the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of the processes should be determined by their functions and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.
Those of ordinary skill in the art will appreciate that the various illustrative logical blocks and steps (step) described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the procedures or functions described in accordance with the present application are generated, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by wire (e.g., coaxial cable, fiber optic, digital subscriber line) or wirelessly (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that incorporates one or more of the available media. The usable medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., Solid state disk), among others.

Claims (32)

1. A data communication method based on dual carrier modulation, comprising:
the first network equipment determines a first high-order modulation data stream to a fourth high-order modulation data stream;
the first high-order modulation data stream and the second high-order modulation data stream are both obtained by a first low-order modulation data stream and a second low-order modulation data stream based on a first matrix;
the third high-order modulated data stream and the fourth high-order modulated data stream are both obtained by a third low-order modulated data stream and a fourth low-order modulated data stream based on a second matrix;
the first network device sends the first high-order modulated data stream on a first subcarrier and sends the fourth high-order modulated data stream on a second subcarrier;
wherein the second high-order modulated data stream and the third high-order modulated data stream are transmitted on the second subcarrier and the first subcarrier, respectively, by a cooperating second network device.
2. The method of claim 1, further comprising:
the first network device sends downlink control information, where the downlink control information includes a first indication, and the first indication is used to indicate whether the first to fourth higher-order modulated data streams adopt a cooperative dual carrier modulation sending mode.
3. The method according to claim 1 or 2, wherein the first to fourth low order modulated data streams are all data streams of a first terminal device.
4. The method according to claim 1 or 2, wherein the first to fourth low-order modulated data streams are data streams of two terminal devices, respectively, the two terminal devices including the first terminal device and a second terminal device;
the first low-order modulated data stream and the second low-order modulated data stream are data streams of the first terminal device, and the third low-order modulated data stream and the fourth low-order modulated data stream are data streams of the second terminal device; alternatively, the first and second electrodes may be,
the first low-order modulated data stream and the third low-order modulated data stream are data streams of the first terminal device, and the second low-order modulated data stream and the fourth low-order modulated data stream are data streams of the second terminal device.
5. The method according to claim 4, wherein the downlink control information further includes a second indication indicating a correspondence relationship between the first to fourth low-order modulated data streams and the two terminal devices,
the corresponding relationship is used for determining terminal devices to which the first low-order modulation data stream to the fourth low-order modulation data stream respectively belong.
6. The method of claim 4, wherein the downlink control information further includes identities of the two terminal devices;
the sequence of the identifiers of the two terminal devices in the downlink control information is used for indicating the corresponding relationship between the first low-order modulation data stream to the fourth low-order modulation data stream and the two terminal devices; the corresponding relationship is used for determining terminal devices to which the first low-order modulation data stream to the fourth low-order modulation data stream respectively belong.
7. The method according to any of claims 1 to 6, wherein when the first to the fourth low order modulated data streams are data streams obtained by Binary Phase Shift Keying (BPSK) modulation, the first to the fourth high order modulated data streams are data streams obtained by Quadrature Phase Shift Keying (QPSK) modulation;
the first matrix and the second matrix are each one Q of the following matrices:
Figure FDA0001835454620000021
Figure FDA0001835454620000022
Figure FDA0001835454620000023
Figure FDA0001835454620000024
8. the method according to any of claims 1 to 6, wherein when the first to the fourth low order modulated data streams are data streams obtained by QPSK modulation, the first to the fourth high order modulated data streams are data streams obtained by 16QAM with 16 QAM;
the first matrix and the second matrix are each one Q of the following matrices:
Figure FDA0001835454620000025
Figure FDA0001835454620000026
Figure FDA0001835454620000027
Figure FDA0001835454620000028
9. a data communication method based on dual carrier modulation, comprising:
the first terminal equipment receives a first high-order modulation data stream sent by the first network equipment and a third high-order modulation data stream sent by the second network equipment on the first subcarrier respectively; receiving a second high-order modulation data stream sent by the second network device and a fourth high-order modulation data stream sent by the first network device on a second subcarrier respectively;
the first high-order modulation data stream and the second high-order modulation data stream are both obtained by a first low-order modulation data stream and a second low-order modulation data stream based on a first matrix;
the third high-order modulated data stream and the fourth high-order modulated data stream are both obtained by a third low-order modulated data stream and a fourth low-order modulated data stream based on a second matrix;
and the first terminal device demodulates the first high-order modulation data stream to the fourth high-order modulation data stream by using the first matrix and the second matrix to obtain the data stream of the first terminal device.
10. The method of claim 9, further comprising:
the first terminal device receives downlink control information, where the downlink control information includes a first indication, and the first indication is used to indicate whether the first to fourth higher-order modulated data streams adopt a transmission mode of cooperative dual carrier modulation.
11. The method according to claim 9 or 10, wherein the first to fourth low order modulated data streams are all data streams of the first terminal device.
12. The method according to claim 9 or 10, wherein the first to fourth low-order modulated data streams are data streams of two terminal devices, respectively, the two terminal devices comprising the first terminal device and a second terminal device;
the first low-order modulated data stream and the second low-order modulated data stream are data streams of the first terminal device, and the third low-order modulated data stream and the fourth low-order modulated data stream are data streams of the second terminal device; alternatively, the first and second electrodes may be,
the first low-order modulated data stream and the third low-order modulated data stream are data streams of the first terminal device, and the second low-order modulated data stream and the fourth low-order modulated data stream are data streams of the second terminal device.
13. The method of claim 12,
the downlink control information further includes a second indication, where the second indication is used to indicate a correspondence relationship between the first low-order modulated data stream to the fourth low-order modulated data stream and the two terminal devices; the corresponding relationship is used for determining terminal devices to which the first low-order modulation data stream to the fourth low-order modulation data stream respectively belong.
14. The method of claim 12, wherein the downlink control information further comprises: the sequence of the identifiers of the two terminal devices in the downlink control information is used to indicate a correspondence between the first to fourth low-order modulated data streams and the two terminal devices, where the correspondence is used to determine the terminal devices to which the first to fourth low-order modulated data streams belong respectively.
15. The method according to any of claims 9 to 14, wherein when the first to the fourth low order modulated data streams are data streams obtained by binary phase shift keying modulation BPSK, the first to the fourth high order modulated data streams are data streams obtained by quadrature phase shift keying modulation QPSK;
the first matrix and the second matrix are each one Q of the following matrices:
Figure FDA0001835454620000031
Figure FDA0001835454620000032
Figure FDA0001835454620000033
Figure FDA0001835454620000034
16. the method according to any of claims 9 to 14, wherein when the first to the fourth low order modulated data streams are data streams obtained by quadrature phase shift keying QPSK modulation, the first to the fourth high order modulated data streams are data streams obtained by 16QAM with 16quadrature amplitude modulation;
the first matrix and the second matrix are each one Q of the following matrices:
Figure FDA0001835454620000035
Figure FDA0001835454620000041
Figure FDA0001835454620000042
Figure FDA0001835454620000043
17. a data communication apparatus based on dual carrier modulation, applied in a first network device, comprising:
the determining module is used for determining a first high-order modulation data stream to a fourth high-order modulation data stream;
the first high-order modulation data stream and the second high-order modulation data stream are both obtained by a first low-order modulation data stream and a second low-order modulation data stream based on a first matrix;
the third high-order modulated data stream and the fourth high-order modulated data stream are both obtained by a third low-order modulated data stream and a fourth low-order modulated data stream based on a second matrix;
a sending module, configured to send the first high-order modulated data stream on a first subcarrier, and send the fourth high-order modulated data stream on a second subcarrier;
wherein the second high-order modulated data stream and the third high-order modulated data stream are transmitted on the second subcarrier and the first subcarrier, respectively, by a cooperating second network device.
18. The apparatus of claim 17,
the sending module is further configured to send downlink control information, where the downlink control information includes a first indication, and the first indication is used to indicate whether the first to fourth higher-order modulated data streams adopt a cooperative dual-carrier modulation sending manner.
19. The apparatus according to claim 17 or 18, wherein the first to fourth low order modulated data streams are all data streams of a first terminal device.
20. The apparatus according to claim 17 or 18, wherein the first to fourth low-order modulated data streams are data streams of two terminal devices, respectively, the two terminal devices including the first terminal device and the second terminal device;
the first low-order modulated data stream and the second low-order modulated data stream are data streams of the first terminal device, and the third low-order modulated data stream and the fourth low-order modulated data stream are data streams of the second terminal device; alternatively, the first and second electrodes may be,
the first low-order modulated data stream and the third low-order modulated data stream are data streams of the first terminal device, and the second low-order modulated data stream and the fourth low-order modulated data stream are data streams of the second terminal device.
21. The apparatus of claim 20, wherein the downlink control information further includes a second indication indicating a correspondence between the first to fourth low-order modulated data streams and the two terminal devices,
the corresponding relationship is used for determining terminal devices to which the first low-order modulation data stream to the fourth low-order modulation data stream respectively belong.
22. The apparatus of claim 20, wherein the downlink control information further comprises identities of the two terminal devices;
the sequence of the identifiers of the two terminal devices in the downlink control information is used for indicating the corresponding relationship between the first low-order modulation data stream to the fourth low-order modulation data stream and the two terminal devices; the corresponding relationship is used for determining terminal devices to which the first low-order modulation data stream to the fourth low-order modulation data stream respectively belong.
23. The apparatus according to any of claims 17 to 22, wherein when the first to the fourth low order modulated data streams are data streams obtained by Binary Phase Shift Keying (BPSK) modulation, the first to the fourth high order modulated data streams are data streams obtained by Quadrature Phase Shift Keying (QPSK) modulation;
the first matrix and the second matrix are each one Q of the following matrices:
Figure FDA0001835454620000051
Figure FDA0001835454620000052
Figure FDA0001835454620000053
Figure FDA0001835454620000054
24. the apparatus according to any of claims 17 to 22, wherein when the first to the fourth low order modulated data streams are data streams obtained by quadrature phase shift keying QPSK modulation, the first to the fourth high order modulated data streams are data streams obtained by 16QAM with 16quadrature amplitude modulation;
the first matrix and the second matrix are each one Q of the following matrices:
Figure FDA0001835454620000055
Figure FDA0001835454620000056
Figure FDA0001835454620000057
Figure FDA0001835454620000058
25. a data communication apparatus based on dual carrier modulation, applied in a first terminal device, comprising:
a receiving module, configured to receive, on a first subcarrier, a first high-order modulated data stream sent by a first network device and a third high-order modulated data stream sent by a second network device, respectively; receiving a second high-order modulation data stream sent by the second network device and a fourth high-order modulation data stream sent by the first network device on a second subcarrier respectively;
the first high-order modulation data stream and the second high-order modulation data stream are both obtained by a first low-order modulation data stream and a second low-order modulation data stream based on a first matrix;
the third high-order modulated data stream and the fourth high-order modulated data stream are both obtained by a third low-order modulated data stream and a fourth low-order modulated data stream based on a second matrix;
a demodulation module, configured to demodulate the first high-order modulated data stream to the fourth high-order modulated data stream by using the first matrix and the second matrix, so as to obtain a data stream of the first terminal device.
26. The apparatus of claim 25, further comprising:
a receiving module, configured to receive downlink control information, where the downlink control information includes a first indication, and the first indication is used to indicate whether the first to fourth higher-order modulated data streams adopt a transmission manner of cooperative dual carrier modulation.
27. The apparatus according to claim 25 or 26, wherein the first to fourth low-order modulated data streams are all data streams of the first terminal device.
28. The apparatus according to claim 25 or 26, wherein the first to fourth low-order modulated data streams are data streams of two terminal devices, respectively, the two terminal devices comprising the first terminal device and a second terminal device;
the first low-order modulated data stream and the second low-order modulated data stream are data streams of the first terminal device, and the third low-order modulated data stream and the fourth low-order modulated data stream are data streams of the second terminal device; alternatively, the first and second electrodes may be,
the first low-order modulated data stream and the third low-order modulated data stream are data streams of the first terminal device, and the second low-order modulated data stream and the fourth low-order modulated data stream are data streams of the second terminal device.
29. The apparatus of claim 28,
the downlink control information further includes a second indication, where the second indication is used to indicate a correspondence relationship between the first low-order modulated data stream to the fourth low-order modulated data stream and the two terminal devices; the corresponding relationship is used for determining terminal devices to which the first low-order modulation data stream to the fourth low-order modulation data stream respectively belong.
30. The apparatus of claim 28,
the downlink control information further includes: the sequence of the identifiers of the two terminal devices in the downlink control information is used to indicate a correspondence between the first to fourth low-order modulated data streams and the two terminal devices, where the correspondence is used to determine the terminal devices to which the first to fourth low-order modulated data streams belong respectively.
31. The apparatus of any one of claims 25 to 30,
when the first to fourth low-order modulated data streams are data streams obtained by using binary phase shift keying modulation BPSK, the first to fourth high-order modulated data streams are data streams obtained by using quadrature phase shift keying modulation QPSK;
the first matrix and the second matrix are each one Q of the following matrices:
Figure FDA0001835454620000061
Figure FDA0001835454620000062
Figure FDA0001835454620000063
Figure FDA0001835454620000071
32. the apparatus of any one of claims 25 to 30,
when the first to fourth low-order modulated data streams are data streams obtained by Quadrature Phase Shift Keying (QPSK) modulation, the first to fourth high-order modulated data streams are data streams obtained by 16QAM modulation;
the first matrix and the second matrix are each one Q of the following matrices:
Figure FDA0001835454620000072
Figure FDA0001835454620000073
Figure FDA0001835454620000074
Figure FDA0001835454620000075
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