Signal transmission method, device and program product

Abstract

The present disclosure provides a signal transmission method, device and program product, relates to the technical field of communication, and is beneficial to reducing the interference between signals. The method comprises the following steps: determining a first transmission resource and a second transmission resource, transmitting reference signals corresponding to K1 ports on the first transmission resource, and transmitting data of K2 layers on the second transmission resource; wherein the first transmission resource comprises K3 resource element (RE) sets; each RE in the RE set is mapped onto the first transmission resource in a frequency domain first manner; at least one of time domain, frequency domain and code domain resources corresponding to the K1 ports is different.

Description

Technical Field

[0001] This disclosure relates to the field of communication technology, and in particular to a signal transmission method, apparatus, and program product. Background Technology

[0002] In wireless communication systems, the transmitter sends a reference signal to help the receiver obtain channel estimates for data decoding. Typically, the reference signal and data are transmitted on different time-frequency resource elements (REs) to avoid interference between them. However, with the increase in antenna ports in a multiple-input multiple-output (MIMO) system, the overhead of the reference signal increases, and the system's spectral efficiency decreases. To further reduce reference signal overhead, it is possible to transmit both the reference signal and data simultaneously on the same time-frequency resource. Therefore, how to transmit the reference signal and data simultaneously on the same time-frequency resource is a problem worthy of investigation. Summary of the Invention

[0003] This disclosure provides a signal transmission method, apparatus, and program product, which helps to reduce interference between signals. The technical solutions provided by this disclosure are as follows:

[0004] On the one hand, a signal transmission method is provided, applied to a first node, the method comprising:

[0005] A first transmission resource and a second transmission resource are determined. Reference signals corresponding to K1 ports are transmitted on the first transmission resource, and data of K2 layers are transmitted on the second transmission resource. The first transmission resource includes a set of K3 resource units (REs). Each RE in the RE set is mapped to the first transmission resource in a frequency-domain priority manner. At least one of the time-domain, frequency-domain, and code-domain resources corresponding to the K1 ports is different. K1, K2, and K3 are positive integers.

[0006] On the other hand, a signal transmission method is provided for application to a second node, the method comprising:

[0007] The reference signals corresponding to K1 ports are received on the first transmission resource, and the data of K2 layers are received on the second transmission resource; wherein, the first transmission resource includes a set of K3 resource elements RE; each RE in the RE set is mapped to the first transmission resource in a frequency-domain priority manner; at least one of the time-domain, frequency-domain, and code-domain resources corresponding to the K1 ports is different; wherein, K1, K2, and K3 are positive integers.

[0008] In another aspect, a communication device is provided for use in a first node, the device comprising:

[0009] The processing module is used to determine the first transmission resource and the second transmission resource;

[0010] The communication module is used to transmit reference signals corresponding to K1 ports on a first transmission resource and transmit data of K2 layers on a second transmission resource; wherein, the first transmission resource includes a set of K3 resource units (REs); each RE in the RE set is mapped to the first transmission resource in a frequency-domain priority manner; at least one of the time-domain, frequency-domain, and code-domain resources corresponding to the K1 ports is different; wherein, K1, K2, and K3 are positive integers.

[0011] In another aspect, a communication device is provided for use in a second node, the device comprising:

[0012] The communication module is used to receive reference signals corresponding to K1 ports on a first transmission resource and data from K2 layers on a second transmission resource; wherein, the first transmission resource includes a set of K3 resource elements RE; each RE in the RE set is mapped to the first transmission resource in a frequency-domain priority manner; at least one of the time-domain, frequency-domain, and code-domain resources corresponding to the K1 ports is different; wherein, K1, K2, and K3 are positive integers.

[0013] In another aspect, a communication device is provided, comprising: a memory and a processor; the memory and the processor are coupled; the memory is used to store computer program instructions executable by the processor; and the processor implements the signal transmission method of any of the above embodiments when executing the computer program instructions.

[0014] In another aspect, a computer-readable storage medium is provided, on which computer program instructions are stored, which, when executed on a computer (e.g., a communication device), implement the signal transmission method of any of the above embodiments.

[0015] In another aspect, a computer program product is provided, which includes computer program instructions that, when executed, implement the signal transmission method of any of the above embodiments.

[0016] The technical solution provided in this disclosure determines a first transmission resource and a second transmission resource; K1 reference signals corresponding to ports are transmitted on the first transmission resource, and K2 layer data are transmitted on the second transmission resource; wherein, the first transmission resource includes a set of K3 resource units (REs). Each RE in the RE set is mapped to the first transmission resource in a frequency-domain priority manner, thus supporting reference signals for more ports with fewer time-domain symbols, allowing the receiver to begin signal detection earlier and improving signal transmission efficiency. At least one of the time-domain, frequency-domain, and code-domain resources corresponding to the K1 ports is different, which can reduce mutual interference between signals transmitted from different ports and further improve signal transmission efficiency. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the architecture of a communication system provided in an embodiment of the present disclosure;

[0018] Figure 2 A flowchart of a signal transmission method provided in an embodiment of this disclosure;

[0019] Figure 3 This is a schematic diagram illustrating the distribution of an RE set according to an embodiment of the present disclosure;

[0020] Figure 4 A schematic diagram illustrating the distribution of another RE set provided in an embodiment of this disclosure;

[0021] Figure 5 A schematic diagram illustrating the distribution of another RE set provided in an embodiment of this disclosure;

[0022] Figure 6 A schematic diagram illustrating the distribution of another RE set provided in an embodiment of this disclosure;

[0023] Figure 7 This is a schematic diagram of time-frequency resource configuration provided in an embodiment of the present disclosure;

[0024] Figure 8 This is a schematic diagram of another time-frequency resource configuration provided in an embodiment of this disclosure;

[0025] Figure 9 This is another time-frequency resource configuration diagram provided in the embodiments of this disclosure;

[0026] Figure 10 This is another time-frequency resource configuration diagram provided in the embodiments of this disclosure;

[0027] Figure 11 This is another time-frequency resource configuration diagram provided in the embodiments of this disclosure;

[0028] Figure 12 This is another time-frequency resource configuration diagram provided in the embodiments of this disclosure;

[0029] Figure 13 This is another time-frequency resource configuration diagram provided in the embodiments of this disclosure;

[0030] Figure 14 This is another time-frequency resource configuration diagram provided in the embodiments of this disclosure;

[0031] Figure 15 This is another time-frequency resource configuration diagram provided in the embodiments of this disclosure;

[0032] Figure 16 This is another time-frequency resource configuration diagram provided in the embodiments of this disclosure;

[0033] Figure 17 This is another time-frequency resource configuration diagram provided in the embodiments of this disclosure;

[0034] Figure 18 This is another time-frequency resource configuration diagram provided in the embodiments of this disclosure;

[0035] Figure 19 This is another time-frequency resource configuration diagram provided in the embodiments of this disclosure;

[0036] Figure 20 This is another time-frequency resource configuration diagram provided in the embodiments of this disclosure;

[0037] Figure 21 This is another time-frequency resource configuration diagram provided in the embodiments of this disclosure;

[0038] Figure 22 This is another time-frequency resource configuration diagram provided in the embodiments of this disclosure;

[0039] Figure 23 This is another time-frequency resource configuration diagram provided in the embodiments of this disclosure;

[0040] Figure 24 This is another time-frequency resource configuration diagram provided in the embodiments of this disclosure;

[0041] Figure 25 This is another time-frequency resource configuration diagram provided in the embodiments of this disclosure;

[0042] Figure 26 This is another time-frequency resource configuration diagram provided in the embodiments of this disclosure;

[0043] Figure 27 This is another time-frequency resource configuration diagram provided in the embodiments of this disclosure;

[0044] Figure 28 This is another time-frequency resource configuration diagram provided in the embodiments of this disclosure;

[0045] Figure 29 This is another time-frequency resource configuration diagram provided in the embodiments of this disclosure;

[0046] Figure 30 A flowchart illustrating another signal transmission method provided in this disclosure embodiment;

[0047] Figure 31 This is a schematic diagram of the structure of a communication device provided in an embodiment of the present disclosure;

[0048] Figure 32 This is a schematic diagram of another communication device provided in an embodiment of the present disclosure;

[0049] Figure 33 This is a schematic diagram of the structure of another communication device provided in an embodiment of the present disclosure. Detailed Implementation

[0050] The technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments of this disclosure, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this disclosure.

[0051] In this disclosure, unless otherwise stated, " / " means "or," for example, A / B can mean A or B. "And / or" in this document is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, and B alone. Furthermore, "at least one" means one or more, and "multiple" means two or more. The terms "first," "second," etc., do not limit the quantity or order of execution, and "first," "second," etc., do not necessarily imply differences.

[0052] It should be noted that in this disclosure, the terms "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in this disclosure should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of terms such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner.

[0053] In wireless communication systems, the transmitter sends a reference signal to help the receiver obtain channel estimates for data decoding. Typically, the reference signal and data are transmitted on different time-frequency resource elements (REs) to avoid interference between them. However, with the increase in antenna ports in a multiple-input multiple-output (MIMO) system, the overhead of the reference signal increases, and the system's spectral efficiency decreases. To further reduce reference signal overhead, it is possible to transmit both the reference signal and data simultaneously on the same time-frequency resource. Therefore, how to transmit the reference signal and data simultaneously on the same time-frequency resource is a problem worthy of investigation.

[0054] In modern wireless communication systems, when data and reference signals are superimposed and transmitted on the same resources, the interference of data on the reference signal becomes increasingly significant with the increase in the number of transmission layers. Furthermore, reference signals between different antenna ports may also interfere with each other. This interference affects the accuracy of channel detection at the receiver, thus impacting the overall performance of the communication system. Therefore, how to rationally design the superposition mode of reference signal sequences and data at different antenna ports to reduce interference and ensure the accuracy of signal detection at the receiver has become a critical technical problem that urgently needs to be solved.

[0055] In view of this, this disclosure provides a signal transmission method, which includes: determining a first transmission resource and a second transmission resource; transmitting reference signals corresponding to K1 ports on the first transmission resource; and transmitting data from K2 layers on the second transmission resource. The first transmission resource includes a set of K3 resource units (REs). Each RE in the RE set is mapped to the first transmission resource in a frequency-domain priority manner, thus supporting reference signals from more ports with fewer time-domain symbols, allowing the receiver to begin signal detection earlier and improving signal transmission efficiency. At least one of the time-domain, frequency-domain, and code-domain resources corresponding to the K1 ports is different, which can reduce mutual interference between signals transmitted from different ports and further improve signal transmission efficiency.

[0056] In some embodiments, transmission in this disclosure includes sending or receiving. For example, sending data or signals, or receiving data or signals.

[0057] The signal transmission method provided in this disclosure can be applied to systems with various communication standards. For example, the systems to which the signal transmission method provided in this disclosure can be applied include, but are not limited to, MIMO systems, New Radio (NR) systems, Long Term Evolution (LTE) systems, various versions based on LTE evolution, 5th generation (5G) communication systems, wireless fidelity (Wi-Fi) systems, 3GPP-related communication systems, ambient internet of things (Ambient IoT) systems, or systems integrating multiple systems. In addition, the signal transmission method provided in this disclosure can also be applied to future-oriented communication systems (such as 6G and 7G communication systems), and this disclosure does not limit this application.

[0058] In this embodiment of the disclosure, the network architecture of the mobile communication network (including but not limited to 3G, 4G, 5G, and future mobile communication networks) may include at least a first communication node and a second communication node. In the uplink, the first communication node may be a terminal-side device (e.g., including but not limited to a terminal), and the second communication node may be a network-side device (e.g., including but not limited to a base station). In the downlink, the second communication node may be a terminal-side device (e.g., including but not limited to a terminal), and the first communication node may be a network-side device (e.g., including but not limited to a base station). The first communication node may be referred to as the first node, and the second communication node may be referred to as the second node.

[0059] For example, taking the first node as the base station and the second node as the terminal, Figure 1 The diagram illustrates an architecture of a communication system according to an embodiment of this disclosure. The communication system includes a terminal 10 and a base station 20. The terminal 10 is communicatively connected to the base station 20. There can be one or more terminals 10 and base stations 20; the number is not limited.

[0060] Among them, terminal 10 can be terminal-side equipment (such as, but not limited to, terminals, IoT devices), etc., and base station 20 can be network-side equipment (such as, but not limited to, access network equipment (such as base stations)), relays, auxiliary communication nodes, etc.

[0061] In some embodiments, the base station 20 transmits control signals to the terminal 10 based on a signal transmission mode. The control signals include reference signals and data signals. The signal transmission mode includes a normal mode and at least one enhanced mode.

[0062] In some embodiments, terminal 10 detects control signals sent by base station 20, wherein the signal transmission mode of the control signals includes a normal mode and at least one enhanced mode.

[0063] In some embodiments, the terminal may be a traditional terminal, a 5G lightweight user terminal (RedCap terminal), etc.

[0064] In some embodiments, a terminal can be a device with wireless transceiver capabilities. A terminal can be a passive device, an ambient IoT device, a mobile phone, a tablet computer, a computer with wireless transceiver capabilities, a virtual reality (VR) terminal, an augmented reality (AR) terminal, a wireless terminal in industrial control, a wireless terminal in self-driving, a wireless terminal in remote medical care, a wireless terminal in a smart grid, a wireless terminal in transportation safety, a wireless terminal in a smart city, a wireless terminal in a smart home, etc. The embodiments of this disclosure do not limit the application scenarios. A terminal may also be referred to as a tag, user, user equipment (UE), access terminal, UE unit, UE station, mobile station, mobile station, remote station, remote terminal, mobile device, UE terminal, wireless communication device, UE agent, or UE device, etc., and the embodiments of this disclosure do not limit these terms.

[0065] In some embodiments, the base station may be a base station in Long Term Evolution (LTE), Long Term Evolution Advanced (LTEA), or an evolved Node B (eNB or eNodeB), a base station device in a 5G network, or a base station in a future communication system, etc. The base station may include various macro base stations, micro base stations, home base stations, wireless remote extensions, reconfigurable intelligent surfaces (RISs), routers, relays, transmit receive points (TRPs), wireless fidelity (WIFI) devices, UEs, and other network-side devices. This disclosure does not limit this aspect.

[0066] It should be noted that, Figure 1 This is just an example framework diagram. Figure 1 The number of devices included and the names of each device are unlimited, except for... Figure 1 In addition to the devices shown, the communication system may also include other devices, such as core network equipment, and this disclosure does not impose any restrictions on this.

[0067] The application scenarios of the embodiments disclosed herein are not limited. The system architecture and business scenarios described in the embodiments of this disclosure are for the purpose of more clearly illustrating the technical solutions of the embodiments of this disclosure, and do not constitute a limitation on the technical solutions provided by the embodiments of this disclosure. As those skilled in the art will know, with the evolution of network architecture and the emergence of new business scenarios, the technical solutions provided by the embodiments of this disclosure are also applicable to similar technical problems.

[0068] This disclosure provides a signal transmission method applied to a first node. For example... Figure 2 As shown, the method includes the following steps:

[0069] S101. Determine the first transmission resource and the second transmission resource.

[0070] S102. Transmit the reference signals corresponding to K1 ports on the first transmission resource, and transmit the data of K2 layers on the second transmission resource.

[0071] The first transmission resource includes a set of K3 resource units (REs).

[0072] Each RE in the RE set is mapped to the first transport resource in a frequency-domain priority manner.

[0073] At least one of the time-domain, frequency-domain, and code-domain resources corresponding to the K1 ports is different. Wherein, K1, K2, and K3 are positive integers.

[0074] The ports in this disclosure may include antenna ports or channel state information-reference signal (CSI-RS) ports.

[0075] The data in this disclosure includes uplink traffic channel data (physical uplink shared channel) and downlink traffic channel data (physical downlink shared channel).

[0076] The reference signals in this disclosure include pilot reference signals, demodulation reference signals (DMRS), and CSI-RS.

[0077] In some embodiments, the RE set is the smallest hourly frequency resource unit that supports the transmission of reference signals corresponding to K1 ports. The RE set includes N1 subcarriers in the frequency domain and N2 time-domain symbols in the time domain, where N1 is less than or equal to K (e.g., 24), N2 is less than or equal to M (e.g., 4), and K and M are positive integers.

[0078] The time-domain symbols in this disclosure include orthogonal frequency division multiplexing (OFDM) symbols.

[0079] The RE set in this disclosure may have other names, such as overlay basic unit, basic transport resource, DMRS pattern, and this disclosure does not limit it.

[0080] In some embodiments, the frequency-domain-first mapping method involves mapping the REs in the RE set first to the N1 subcarriers of the i-th symbol, and then to the N1 subcarriers of the (i+1)-th symbol, where i is a non-negative integer. This allows for the transmission of reference signals to more ports with fewer time-domain symbols, enabling the receiver to begin the signal detection process earlier.

[0081] In some embodiments, the RE set is mapped onto the first transmission resource K4 consecutive times in the frequency domain, where K4 is an integer and N1*K4 equals the total number of subcarriers occupied by the first transmission resource. For example, if the total number of subcarriers occupied by the first transmission resource is N... schedule Therefore, the RE set needs to be continuously mapped N in the frequency domain of the first transmission resource. schedule / N1 times, in order to cover the entire bandwidth of the first transmission resource to cope with the multipath delay spread of different channels.

[0082] In some embodiments, the distribution density of RE sets in the time domain is determined jointly by a preset configuration table and first indication information. The preset configuration table includes a correspondence between at least two of the following: the number of symbols occupied by each RE set in the time domain, the time domain density indication value, and the symbol positions occupied by each RE set in the time domain. The first indication information is carried in the control information. The first indication information is used to determine the time domain density indication value. The index information of the preset configuration table may also be configured in the control information.

[0083] For example, layer 1-N data (represented as Layer 1-N Data in the diagram) and port 1-N (represented as Port 1-N DMRS in the diagram) are transmitted in superimposed form, with the RE set used to transmit the reference signal for port 1-N. In high-speed scenarios, the RE set needs to have a higher distribution density in the time domain to track channel changes over time, such as... Figure 3 As shown in (a) of the diagram. In low-speed scenarios, the channel changes more slowly in the time domain, and the distribution density of the RE set in the time domain can be lower, such as... Figure 3 As shown in (b) of the diagram.

[0084] For example, the preset configuration table can be defined as shown in Table 1, where l0 is the starting symbol index of the current data transmission. When an RE set occupies 1 symbol in the time domain, there are 6 preset distribution densities of the RE set in the time domain, each corresponding to a different time domain density indication value; when an RE set occupies 2 symbols in the time domain, there are 4 preset distribution densities of the RE set in the time domain, each corresponding to a different time domain density indication value; when an RE set occupies 4 symbols in the time domain, there are 3 preset distribution densities of the RE set in the time domain (i.e., 3 preset time domain densities), each corresponding to a different time domain density indication value.

[0085] Table 1

[0086]

[0087]

[0088] For example, Figure 4 The figure shows six preset time-domain densities corresponding to a RE set occupying 1 symbol in the time domain when the number of data transmission symbols is 14 (i.e., symbols 0-13 in the time domain (t) in the figure) and the starting symbol l0 is 0.

[0089] Figure 5 The figure shows four preset time-domain densities when the number of data transmission symbols is 14 (i.e., symbols 0-13 in the time domain (t) in the figure) and the starting symbol l0 is 0, corresponding to 2 symbols occupied by an RE set in the time domain.

[0090] Figure 6 The figure shows three preset time-domain densities when the number of data transmission symbols is 14 (i.e., symbols 0-13 in the time domain (t) in the figure) and the starting symbol l0 is 0, corresponding to 4 symbols in the time domain of an RE set.

[0091] In some embodiments, a new field is added to the downlink control information (DCI) to determine the time-domain density indication value. The transmitter selects the location of the RE set mapped on the time-frequency resource from a preset configuration table based on the actual number of symbols transmitted, the starting symbol, the time-domain density indication value, and the number of symbols occupied by each RE set in the time domain. For example, when the number of data transmission symbols is 5 and the starting symbol l0 = 2, the number of symbols occupied by each RE set in the time domain is 1, and the time-domain density indication value is 2, then 2 RE sets need to be transmitted in the time domain, occupying symbol indices l0 = 2 and l0 + 3 = 2 + 3 = 5.

[0092] In some embodiments, when the distribution density of the K3 RE sets in the time domain is greater than a preset value, a second indication information is sent. The second indication information is used to indicate that the phase tracking reference signal PT-RS should be stopped. The second indication information is carried in the control information.

[0093] For example, when the Superimposed Pilot mode for data and reference signals is activated, as shown in Table 1, the DCI needs to send a second indication message when the following conditions are met:

[0094] Each RE set occupies 1 symbol in the time domain and has a time domain density indicator value of 0-3;

[0095] Each RE set occupies 2 symbols in the time domain and has a time domain density indicator value of 0-2;

[0096] Each RE set occupies 4 symbols in the time domain and has a time domain density indicator value of 0.

[0097] In some embodiments, the first transmission resource and the second transmission resource partially or completely overlap, the second transmission resource occupies the same number of subcarriers as the first transmission resource, and the second transmission resource occupies a number of symbols greater than or equal to the first transmission resource.

[0098] The reference signals for K1 ports are transmitted on each RE set in a manner that can be sent to the second node in a radio resource control (RRC) message.

[0099] In some embodiments, the signal sequence of the reference signal is determined based on a base sequence or based on a base sequence and an orthogonal code, and the base sequence is determined based on a pseudo-random sequence, the value of which is related to the initial value of the pseudo-random sequence.

[0100] In some embodiments, the initial value of the pseudo-random sequence is determined based on reference signal configuration parameters, which include at least one of the following: dynamic indicator, static indicator, time slot index, symbol index, code division multiplexing group index, and port index.

[0101] The configuration parameters of the reference signals for the K1 ports vary depending on the method of transmission on each RE set.

[0102] The reference signals of K1 ports can be transmitted on each RE set in a way that the reference signals of all K1 ports are code-division multiplexed in each RE set.

[0103] In some embodiments, the reference signals for all ports of K1 ports employ orthogonal codewords of length H1 in the frequency domain and orthogonal codewords of length H2 in the time domain, where H1 is a positive integer, H2 is a non-negative integer, and H1 is greater than or equal to H2. The values ​​of H1 and H2 are associated with K1. In this way, by using longer orthogonal codewords in the frequency domain, the reference signals can support more ports with fewer time-domain symbols, facilitating the early initiation of signal detection at the receiving end.

[0104] In some embodiments, the length of the orthogonal codeword used in the frequency domain for the reference signals of all K1 ports is determined based on the maximum number of ports supported by the system. Different orthogonal codeword lengths are used depending on the maximum number of ports supported by the system.

[0105] For example, when the maximum number of ports supported by the system is 4 or 6, the RE set occupies 4 or 6 subcarriers in the frequency domain, and all ports are supported only by frequency domain orthogonal codes.

[0106] When the maximum number of ports supported by the system is 8, 12, 16, 24, 32, or 48, the RE set occupies 2 consecutive symbols in the time domain and 4, 6, 8, 12, 16, or 24 subcarriers in the frequency domain. It uses frequency and time domain orthogonal codes to support all ports. In this way, it supports all ports. In the time domain, it only uses orthogonal codes of length 2 in 2 consecutive symbols, and in the frequency domain, it uses orthogonal codes of length 4, 6, 8, 12, 16, or 24.

[0107] When the maximum number of ports supported by the system is 64 or 96, the RE set occupies 4 consecutive symbols in the time domain and 16 or 24 subcarriers in the frequency domain. It also uses orthogonal codes in the frequency and time domains to support all ports. In the time domain, only the 4 consecutive symbols use orthogonal codes of length 4, and in the frequency domain, it uses orthogonal codes of length 16 or 24.

[0108] Specifically, when the maximum number of ports is 16 / 48 / 96, the number of transmission resource blocks (RBs) must be an even number. When the maximum number of ports is 32 / 64, the number of transmission resource blocks must be a multiple of 4. This ensures the transmission of reference signals when the maximum number of ports is 16 / 48 / 96.

[0109] The following section, with reference to the accompanying diagram, describes the specific implementation methods for transmitting reference signals and data when the maximum number of ports supported by the system varies.

[0110] For example, such as Figure 7As shown, when the maximum number of ports supported by the system is 4 or 6, 4 or 6 consecutive adjacent subcarriers in the frequency domain form a RE set. The reference signals of the 4 or 6 ports in this RE set (denoted as Layer1-4DMRS or Layer1-6DMRS in the figure) adopt frequency domain OCC orthogonal codes (multiplexed with orthogonal codewords of length 4 or 6), and then are superimposed with the data of 4 or 6 layers (denoted as Layer1-4 Data or Layer1-6 Data in the figure) for transmission.

[0111] For example, such as Figure 8 As shown, when the maximum number of ports supported by the system is 8, 12, or 24, a RE set contains two adjacent OFDM symbols in the time domain (represented as symbols n to n+1 in the figure) and four, six, or 12 consecutive subcarriers in the frequency domain. The reference signals of the 8, 12, or 24 ports in this RE set (denoted as Layer1-8DMRS, Layer1-12DMRS, and Layer1-24DMRS in the figure, respectively) are multiplexed using a combination of frequency domain OCC orthogonal codes (using orthogonal codewords of length 4, 6, or 12) and time domain OCC orthogonal codes (using orthogonal codewords of length 2). Then, they are superimposed and transmitted with the data of the 8, 12, or 24 layers (denoted as Layer1-8 Data, Layer1-12 Data, and Layer1-24 Data in the figure, respectively).

[0112] For example, such as Figure 9 As shown, when the maximum number of ports supported by the system is 16 or 48, a RE set contains two adjacent OFDM symbols in the time domain (represented as symbols n to n+1 in the figure) and 8 or 24 consecutive subcarriers in the frequency domain. The reference signals for the 16 or 48 ports in this RE set (denoted as Layer1-16 DMRS and Layer1-48 DMRS in the figure, respectively) are multiplexed using a combination of frequency-domain OCC orthogonal codes (using orthogonal codewords of length 8 or 24) and time-domain OCC orthogonal codes (using orthogonal codewords of length 2), and then superimposed with the data from the 16 or 48 layers (denoted as Layer1-16 Data and Layer1-48 Data in the figure, respectively) for transmission. At this time, the number of current transmission resource blocks must be even to satisfy the transmission of reference signals and data corresponding to the maximum number of ports.

[0113] For example, such as Figure 10As shown, when the system supports a maximum of 32 ports, a RE set contains two adjacent OFDM symbols in the time domain (represented as symbols n to n+1 in the figure) and 16 consecutive subcarriers in the frequency domain. The reference signals for the 32 ports in this RE set (denoted as Layer 1-32 DMRS in the figure) are multiplexed using a combination of frequency-domain OCC orthogonal codes (using orthogonal codewords of length 16) and time-domain OCC orthogonal codes (using orthogonal codewords of length 2), and then superimposed with the data from 32 layers (denoted as Layer 1-32 Data in the figure) for transmission. Since the length of the frequency-domain orthogonal codeword is 16, the number of current transmission resource blocks must be a multiple of 4.

[0114] For example, such as Figure 11 As shown, when the system supports a maximum of 64 ports, a RE set contains four adjacent OFDM symbols in the time domain (represented as symbols n to n+3 in the figure) and 16 consecutive adjacent subcarriers in the frequency domain. The reference signals for the 64 ports in this RE set (denoted as Layer 1-64 DMRS in the figure) are multiplexed using a combination of frequency-domain OCC orthogonal codes (using orthogonal codewords of length 16) and time-domain OCC orthogonal codes (using orthogonal codewords of length 4), and then superimposed with the data from 64 layers (denoted as Layer 1-64 Data in the figure) for transmission. Since the length of the frequency-domain orthogonal codeword is 16, the number of current transmission resource blocks must be a multiple of 4.

[0115] For example, such as Figure 12 As shown, when the system supports a maximum of 96 ports, a RE set contains four adjacent OFDM symbols in the time domain (represented as symbols n to n+3 in the figure) and 24 consecutive subcarriers in the frequency domain. The reference signals for the 96 ports in this RE set (denoted as Layer 1-96 DMRS in the figure) are multiplexed using a combination of frequency-domain OCC orthogonal codes (using orthogonal codewords of length 24) and time-domain OCC orthogonal codes (using orthogonal codewords of length 4), and then superimposed with the data from 96 layers (denoted as Layer 1-96 Data in the figure) for transmission. Since the length of the frequency-domain orthogonal codeword is 24, the number of current transmission resource blocks must be even.

[0116] In some embodiments, the reference signal configuration parameters include at least one of the following: dynamic indication, static indication, time slot index, and symbol index.

[0117] For example, the basis sequence r(n) of the reference signal is determined by the following formula:

[0118]

[0119] Where c(i) is a pseudo-random sequence, which is based on the initial value c. init Determined, initial value c init Determined by the following formula:

[0120]

[0121] in, This indicates the number of symbols in each slot. is the time slot index where the reference signal is located within the wireless frame, and l is the OFDM symbol index where the reference signal is located within the time slot. When data and reference signals are transmitted in superimposed form, the value of l may be any OFDM symbol within the time slot. and It can be generated according to the relevant protocol. The dynamic indication in the configuration parameters of the reference signal sequence refers to... Static indication refers to

[0122] The K1-port reference signals can be transmitted on each RE set in another way: the K1-port reference signals are divided into L code division multiplexing (CDM) groups in each RE set. Reference signals within the same CDM group are multiplexed on the same time-frequency resources in the RE set using frequency-domain orthogonal codes, or frequency-domain and time-domain orthogonal codes. Reference signals from different CDM groups occupy different time-frequency resources in the RE set. Here, L is a positive integer.

[0123] In some embodiments, the reference signals within the same code division multiplexing group in the L code division multiplexing groups support K1 ports in the frequency domain using orthogonal codewords of H3, where H3 is a positive integer and K1 is equal to the product of L and H3. The reference signals within the same code division multiplexing group in the L code division multiplexing groups support K1 ports using orthogonal codewords of H3 in the frequency domain and orthogonal codewords of H4 in the time domain, where H3 and H4 are positive integers and K1 is equal to the product of L, H3, and H4.

[0124] In some embodiments, H3 is greater than H4, so that reference signals within the same code division multiplexing group preferentially use longer orthogonal codewords in the frequency domain, and then multiplex them on the same time-frequency resources in the form of time-domain orthogonal codewords.

[0125] In some embodiments, the length of the orthogonal codeword used in the frequency domain for the reference signal within the same code division multiplexing group is determined based on the maximum number of ports supported by the system. Different orthogonal codeword lengths are used depending on the maximum number of ports supported by the system.

[0126] For example, Table 2 shows the correspondence between the resources occupied by the RE set, the number of CDM groups, the length of the frequency domain orthogonal codeword, and the length of the time domain orthogonal codeword when the maximum number of ports is different.

[0127] Table 2

[0128]

[0129]

[0130] Specifically, when the maximum number of ports is 8 / 16 / 32 / 96, the number of transmission resource blocks must be an even number. When the maximum number of ports is 64, the number of transmission resource blocks must be a multiple of 4 to satisfy the transmission of reference signals and data corresponding to the maximum number of ports.

[0131] In some embodiments, for each RE set, the frequency domain resources occupied by the reference signal within the same code division multiplexing group in the RE set include multiple subcarriers, which are either consecutive or spaced apart in the frequency domain.

[0132] In some embodiments, for each RE set, the reference signal within the same code division multiplexing group occupies one or more consecutive time-domain symbols in the time domain of the RE set.

[0133] The following section, with reference to the accompanying diagram, describes the specific implementation methods for transmitting reference signals and data when the maximum number of ports supported by the system varies.

[0134] For example, such as Figure 13 As shown in (a), when the maximum number of ports supported by the system is 4, one RE set occupies 4 consecutive subcarriers in the frequency domain, including 2 CDM groups (represented as CDM group#0 and CDM group#1 in the figure). The reference signal of each CDM group is multiplexed using orthogonal codewords of length 2 and occupies 2 subcarriers. These 2 subcarriers can be 2 subcarriers spaced 1 subcarrier apart (such as the nth subcarrier and the (n+2)th subcarrier), or as shown in (a). Figure 13 As shown in (b), these two subcarriers are two consecutive adjacent subcarriers (such as the nth subcarrier and the (n+1)th subcarrier), and are then overlaid with the data from the four layers (referred to as Layer1-4 Data in the figure) for transmission.

[0135] For example, when the maximum number of ports supported by the system is 6, a set of REs occupies 6 consecutive subcarriers in the frequency domain, which includes reference signals of 2 CDM groups or 3 CDM groups.

[0136] like Figure 14As shown in (a), an RE set contains two CDM groups (represented as CDM group#0 and CDM group#1 in the figure). The reference signal of each CDM group uses an orthogonal codeword of length 3 and occupies 3 subcarriers. These 3 subcarriers can be 3 subcarriers spaced 1 subcarrier apart (such as the nth subcarrier, the (n+2)th subcarrier, and the (n+4)th subcarrier), or as shown in (a). Figure 14 As shown in (b), these three subcarriers are three consecutive adjacent subcarriers (e.g., the nth subcarrier, the (n+1)th subcarrier, and the (n+2)th subcarrier), and are then overlaid and transmitted with the data from the six layers (referred to as Layer1-6 Data in the figure).

[0137] like Figure 15 As shown in (a), an RE set contains reference signals for three CDM groups (represented as CDMgroup#0, CDM group#1, and CDM group#2 in the figure). The reference signal of each CDM group uses an orthogonal codeword of length 2 and occupies 2 subcarriers. These 2 subcarriers can be 2 subcarriers spaced 2 subcarriers apart (such as the nth subcarrier and the (n+3)th subcarrier), or as shown in (a). Figure 15 As shown in (b), these two subcarriers are two consecutive adjacent subcarriers (such as the nth subcarrier and the (n+1)th subcarrier), and are then superimposed and transmitted with the data from the six layers (referred to as Layer1-6Data in the figure).

[0138] For example, when the maximum number of ports supported by the system is 8, a RE set occupies 8 consecutive subcarriers in the frequency domain, which includes 2 CDM groups or 4 CDM groups (in which case the number of transmission resource blocks must be even).

[0139] like Figure 16 As shown, when an RE set contains two CDM groups (represented as CDM group#0 and CDM group#1 in the diagram), each CDM group uses an orthogonal codeword of length 4 and occupies 4 subcarriers, which are then overlaid and transmitted with data from 8 layers (referred to as Layer1-8 Data in the diagram). The interval between any two adjacent subcarriers is 1 subcarrier (e.g., the nth subcarrier, the (n+2)th subcarrier, the (n+4)th subcarrier, and the (n+6)th subcarrier); these 4 subcarriers can also be 4 consecutive adjacent subcarriers (e.g., the nth subcarrier, the (n+1)th subcarrier, the (n+2)th subcarrier, and the (n+3)th subcarrier); these 4 subcarriers can also be 2 groups of subcarriers, each group consisting of 2 adjacent subcarriers, with a 2-subcarrier interval between these 2 groups (e.g., one group consists of the nth and (n+1)th subcarriers, and the other group consists of the (n+4)th and (n+5)th subcarriers).

[0140] like Figure 17 As shown, when an RE set contains four CDM groups (represented as CDM group#0, CDM group#1, CDM group#2, and CDM group#3 in the diagram), each CDM group uses an orthogonal codeword of length 2 and occupies two subcarriers, which are then overlaid and transmitted with data from eight layers (referred to as Layer 1-8 Data in the diagram). This can be illustrated as follows: Figure 17 As shown in (a), these two subcarriers are two subcarriers spaced three subcarriers apart (such as the nth subcarrier and the (n+4th)th subcarrier); or as shown in... Figure 17 As shown in (b), these two subcarriers can be two consecutive adjacent subcarriers (e.g., the nth subcarrier and the (n+1)th subcarrier). If the number of transmission resource blocks is not limited, then an RE set can also contain two consecutive OFDM symbols in the time domain and four consecutive adjacent subcarriers in the frequency domain. In this case, an RE set contains two CDM groups, each CDM group using a frequency domain OCC orthogonal code of length 2 and a time domain OCC orthogonal code of length 2. The two frequency domain subcarriers in each CDM group can be two consecutive adjacent subcarriers (e.g., the nth subcarrier and the (n+1)th subcarrier), or two subcarriers spaced one subcarrier apart (e.g., the nth subcarrier and the (n+2)th subcarrier).

[0141] For example, when the maximum number of ports supported by the system is 12, a set of REs occupies 12 consecutive subcarriers in the frequency domain, which includes 2 CDM groups, 3 CDM groups, 4 CDM groups, or 6 CDM groups.

[0142] like Figure 18 As shown, when an RE set contains two CDM groups (represented as CDM group#0 and CDM group#1 in the figure), each CDM group uses an orthogonal codeword of length 6 and occupies 6 subcarriers, which are then superimposed and transmitted with the data of 12 layers (referred to as Layer1-12 Data in the figure). These 6 subcarriers can be 6 subcarriers spaced 1 subcarrier apart (e.g., the nth subcarrier, the (n+2)th subcarrier, the (n+4)th subcarrier, the (n+6)th subcarrier, the (n+8)th subcarrier, and the (n+10)th subcarrier); these 6 subcarriers can also be 2 groups of adjacent subcarriers, each group consisting of 3 subcarriers, with a 3-subcarrier interval between the 2 groups (e.g., one group consists of the nth subcarrier, the (n+1)th subcarrier, and the (n+2)th subcarrier, and the other group consists of the (n+6)th subcarrier, the (n+7)th subcarrier, and the (n+8)th subcarrier); these 6 subcarriers can also be 6 consecutive adjacent subcarriers (e.g., the nth subcarrier, the (n+1)th subcarrier, the (n+2)th subcarrier, the (n+3)th subcarrier, the (n+4)th subcarrier, and the (n+5)th subcarrier).

[0143] like Figure 19 As shown, when an RE set contains 3 CDM groups (represented as CDM group#0, CDM group#1, and CDM group#2 in the figure), each CDM group uses an orthogonal codeword of length 4 and occupies 4 subcarriers, which are then superimposed and transmitted with the data of 12 layers (referred to as Layer1-12 Data in the figure). These 4 subcarriers can be 4 subcarriers spaced 2 subcarriers apart (e.g., the nth subcarrier, the (n+3)th subcarrier, the (n+6)th subcarrier, and the (n+9)th subcarrier); these 4 subcarriers can also be 2 groups of 2 adjacent subcarriers, with a 4-subcarrier interval between these 2 groups (e.g., one group consists of the nth and (n+1)th subcarriers, and the other group consists of the (n+6)th and (n+7)th subcarriers); these 4 subcarriers can also be 4 consecutive adjacent subcarriers (e.g., the nth subcarrier, the (n+1)th subcarrier, the (n+2)th subcarrier, and the (n+3)th subcarrier).

[0144] like Figure 20 As shown, when an RE set contains 4 CDM groups (represented as CDM group#0, CDM group#1, CDM group#2, and CDM group#3 in the figure), each CDM group uses an orthogonal codeword of length 3 and occupies 3 subcarriers, which are then superimposed and transmitted with the data of 12 layers (referred to as Layer1-12 Data in the figure). These 3 subcarriers can be 4 subcarriers spaced 3 subcarriers apart (such as the nth subcarrier, the (n+4th)th subcarrier, and the (n+8th)th subcarrier), or they can be 3 consecutive adjacent subcarriers (such as the nth subcarrier, the (n+1th)th subcarrier, and the (n+2th)th subcarrier).

[0145] like Figure 21 As shown, when an RE set contains 6 CDM groups (represented as CDM group#0, CDM group#1, CDM group#2, CDM group#3, CDM group#4, and CDM group#5 in the figure), each CDM group uses an orthogonal codeword of length 2 and occupies 2 subcarriers, which are then superimposed and transmitted with the data of 12 layers (referred to as Layer1-12Data in the figure). These 2 subcarriers can be two adjacent consecutive subcarriers (e.g., the nth subcarrier and the (n+1)th subcarrier), or two subcarriers with an interval of 5 (e.g., the nth subcarrier and the (n+6)th subcarrier).

[0146] For example, when the system supports a maximum of 12 ports, an RE set can also contain six consecutive subcarriers in the frequency domain on two adjacent OFDM symbols in the time domain, including two or three CDM groups. When an RE set contains two CDM groups, each CDM group uses a time-domain OCC of length 2 and a frequency-domain OCC of length 3. The frequency subcarriers occupied by each CDM group are as follows... Figure 14 The same applies, so it will not be repeated here. When an RE set contains 3 CDM groups, each CDM group uses a time-domain OCC of length 2 and a frequency-domain OCC of length 2. The frequency-domain subcarriers occupied by each CDM group are the same as those in the previous case. Figure 15 The same applies, so I won't go into details here.

[0147] For example, when the system supports a maximum of 16 ports, a single RE set can also contain eight consecutive subcarriers in the frequency domain and two adjacent OFDM symbols in the time domain, including two or four CDM groups. In this case, the number of transmission resource blocks must be even. When an RE set contains two CDM groups, each CDM group uses a time-domain OCC of length 2 and a frequency-domain OCC of length 4. The frequency subcarriers occupied by each CDM group are as follows... Figure 16 The same applies, so it will not be repeated here. When an RE set contains 3 CDM groups, each CDM group uses a time-domain OCC of length 2 and a frequency-domain OCC of length 2. The frequency-domain subcarriers occupied by each CDM group are the same as those in the previous case. Figure 17 The same applies, so I won't go into details here.

[0148] For example, when the system supports a maximum of 24 ports, an RE set can also contain 12 consecutive subcarriers in the frequency domain on two adjacent OFDM symbols in the time domain, including 2, 3, 4, or 6 CDM groups. When an RE set contains 2 CDM groups, each CDM group uses a time-domain OCC of length 2 and a frequency-domain OCC of length 6. The frequency subcarrier configuration of each CDM group is as follows... Figure 18 The same applies, so it will not be repeated here. When an RE set contains 3 CDM groups, each CDM group uses a time-domain OCC of length 2 and a frequency-domain OCC of length 4. The frequency-domain subcarriers occupied by each CDM group are the same as those in the previous case. Figure 19 The same applies, so it will not be repeated here. When an RE set contains 4 CDM groups, each CDM group uses a time-domain OCC of length 2 and a frequency-domain OCC of length 3. The frequency-domain subcarriers occupied by each CDM group are the same as those in the previous case. Figure 20 The same applies, so it will not be repeated here. When an RE set contains 6 CDM groups, each CDM group uses a time-domain OCC of length 2 and a frequency-domain OCC of length 2. The frequency-domain subcarriers occupied by each CDM group are the same as those in the previous case. Figure 21 The same applies, so I won't go into details here.

[0149] For example, when the system supports a maximum of 32 ports, a RE set can also contain 4 adjacent OFDM symbols in the time domain and 8 consecutive adjacent subcarriers in the frequency domain, including 2 or 4 CDM groups. In this case, the number of transmission resource blocks must be even. When an RE set contains 2 CDM groups, each CDM group uses a time-domain OCC of length 4 and a frequency-domain OCC of length 4. The frequency subcarriers occupied by each CDM group are as follows... Figure 16 The same applies, so it will not be repeated here. When an RE set contains 4 CDM groups, each CDM group uses a time-domain OCC of length 4 and a frequency-domain OCC of length 2. The frequency-domain subcarriers occupied by each CDM group are the same as those in the previous case. Figure 17 The same applies, so I won't go into details here.

[0150] For example, when the system supports a maximum of 48 ports, an RE set can also contain 12 consecutive subcarriers in the frequency domain and 4 adjacent OFDM symbols in the time domain, including 2, 3, 4, or 6 CDM groups. When an RE set contains 2 CDM groups, each CDM group uses a time-domain OCC of length 4 and a frequency-domain OCC of length 6. The frequency subcarrier configuration of each CDM group is as follows... Figure 18 The same applies, so it will not be repeated here. When an RE set contains 3 CDM groups, each CDM group uses a time-domain OCC of length 4 and a frequency-domain OCC of length 4. The frequency-domain subcarriers occupied by each CDM group are the same as those in the previous case. Figure 19 The same applies, so it will not be repeated here. When an RE set contains 4 CDM groups, each CDM group uses a time-domain OCC of length 4 and a frequency-domain OCC of length 3. The frequency-domain subcarriers occupied by each CDM group are the same as those in the previous case. Figure 20 The same applies, so it will not be repeated here. When an RE set contains 6 CDM groups, each CDM group uses a time-domain OCC of length 4 and a frequency-domain OCC of length 2. The frequency-domain subcarriers occupied by each CDM group are the same as those in the previous case. Figure 21 The same applies, so I won't go into details here.

[0151] For example, when the system supports a maximum of 64 ports, a single RE set can also contain 16 consecutive subcarriers in the frequency domain and 4 adjacent OFDM symbols in the time domain, including 2, 4, or 8 CDM groups. In this case, the number of transmission resource blocks must be a multiple of 4. When an RE set contains 2 CDM groups, each CDM group uses a time-domain OCC of length 4 and a frequency-domain OCC of length 8. The 8 frequency-domain subcarriers occupied by each CDM group can be 8 consecutive adjacent subcarriers (e.g., the nth, n+1th, n+2th, ..., n+7th subcarriers), or 8 subcarriers spaced by 1 subcarrier (e.g., the nth, n+2th, n+4th, ..., n+14th subcarriers), or 2 groups of 4 adjacent subcarriers. These two groups are separated by 4 subcarriers (for example, one group consists of subcarriers n, n+1, n+2, and n+3, and the other group consists of subcarriers n+8, n+9, n+10, and n+11). Alternatively, there can be 4 groups of 2 adjacent subcarriers separated by 2 subcarriers (for example, one group consists of subcarriers n and n+1, the second group consists of subcarriers n+4 and n+5, the third group consists of subcarriers n+8 and n+9, and the fourth group consists of subcarriers n+12 and n+13). When an RE set contains 4 CDM groups, each CDM group uses a time-domain OCC of length 4 and a frequency-domain OCC of length 4. The 4 frequency-domain subcarriers occupied by each CDM group can be 4 consecutive adjacent subcarriers (e.g., the nth, n+1th, n+2th, and n+3rd subcarriers), or 4 subcarriers spaced 3 subcarriers apart (e.g., the nth, n+4th, n+8th, and n+12th subcarriers), or 2 groups of 2 adjacent subcarriers spaced 6 subcarriers apart (e.g., one group is the nth and n+1st subcarriers, and the other group is the n+8th and n+9th subcarriers). When an RE set contains 8 CDM groups, each CDM group uses a time-domain OCC of length 4 and a frequency-domain OCC of length 2. The two frequency-domain subcarriers occupied by each CDM group can be two adjacent consecutive subcarriers (such as the nth and n+1th subcarriers) or two subcarriers with an interval of 7 (such as the nth and n+8th subcarriers).

[0152] For example, when the maximum number of ports supported by the system is 96, a RE set can also contain 24 consecutive subcarriers in the frequency domain and 4 adjacent OFDM symbols in the time domain, including 2, 3, 4, 6, 8, or 12 CDM groups. In this case, the number of transmission resource blocks must be even. When an RE set contains two CDM groups, each CDM group uses a time-domain OCC of length 4 and a frequency-domain OCC of length 12. The 12 frequency-domain subcarriers occupied by each CDM group can be two consecutive adjacent subcarriers (e.g., the nth, n+1, n+2, ..., n+11th subcarriers), or 12 subcarriers spaced one subcarrier apart (e.g., the nth, n+2, n+4, ..., n+22nd subcarriers), or three groups of four adjacent subcarriers spaced four subcarriers apart (e.g., one group is the nth, n+1, n+2, n+3rd subcarriers, the second group is the n+8th, n+9th, n+10th, n+11th subcarriers, and the third group is the n+16th, n+17th, n+18th, n+11th subcarriers). It can be 9 subcarriers), or 4 groups of 3 adjacent subcarriers, with 3 subcarriers between these 4 groups (for example, the first group is the nth, n+1, n+2th subcarriers, the second group is the n+6th, n+7th, n+8th subcarriers, the third group is the n+12th, n+13th, n+14th subcarriers, and the fourth group is the n+18th, n+19th, n+20th subcarriers). It can also be 6 groups of 2 adjacent subcarriers, with 2 subcarriers between these 6 groups (for example, the first group is the nth, n+1th subcarriers, the second group is the n+4th, n+5th subcarriers, the third group is the n+8th, n+9th subcarriers, the fourth group is the n+12th, n+13th subcarriers, the fifth group is the n+16th, n+17th subcarriers, and the sixth group is the n+20th, n+21st subcarriers). When an RE set contains 3 CDM groups, each CDM group uses a time-domain OCC of length 4 and a frequency-domain OCC of length 8. The 8 frequency-domain subcarriers occupied by each CDM group can be 8 consecutive adjacent subcarriers (e.g., the nth, n+1th, n+2th, ..., n+7th subcarriers), or 8 subcarriers spaced 2 subcarriers apart (e.g., the nth, n+3rd, n+6th, ..., n+21st subcarriers), or 2 groups of 4 adjacent subcarriers. These two groups are separated by 8 subcarriers (for example, one group consists of subcarriers n, n+1, n+2, and n+3, and the second group consists of subcarriers n+12, n+13, n+14, and n+15). Alternatively, there can be 4 groups of 2 adjacent subcarriers, separated by 4 subcarriers (for example, one group consists of subcarriers n and n+1, the second group consists of subcarriers n+6 and n+7, the third group consists of subcarriers n+12 and n+13, and the fourth group consists of subcarriers n+18 and n+19).When an RE set contains 4 CDM groups, each CDM group uses a time-domain OCC of length 4 and a frequency-domain OCC of length 6. The 6 frequency-domain subcarriers occupied by each CDM group can be 6 consecutive adjacent subcarriers (e.g., the nth, n+1th, n+2th, ..., n+5th subcarriers), or 6 subcarriers with a spacing of 3 subcarriers (e.g., the nth, n+4th, n+8th, ..., n+20th subcarriers), or 2 groups of 3 adjacent subcarriers with a spacing of 9 subcarriers between them (e.g., one group is the nth, n+1th, n+2th subcarriers, and the second group is the n+12th, n+13th, n+14th subcarriers). When an RE set contains 6 CDM groups, each CDM group uses a time-domain OCC of length 4 and a frequency-domain OCC of length 4. The 4 frequency-domain subcarriers occupied by each CDM group can be 4 consecutive adjacent subcarriers (e.g., the nth, n+1th, n+2th, and n+3rd subcarriers), or 4 subcarriers with an interval of 5 (e.g., the nth, n+6th, n+12th, and n+18th subcarriers), or 2 groups of 2 adjacent subcarriers with an interval of 10 subcarriers between them (e.g., one group is the nth and n+1st subcarriers, and the second group is the n+12th and n+13th subcarriers). When an RE set contains 8 CDM groups, each CDM group uses a time-domain OCC of length 4 and a frequency-domain OCC of length 3. The 3 frequency-domain subcarriers occupied by each CDM group can be three consecutive adjacent subcarriers (e.g., the nth, n+1th, and n+2th subcarriers) or three subcarriers spaced 7 apart (e.g., the nth, n+8th, and n+16th subcarriers). When an RE set contains 12 CDM groups, each CDM group uses a time-domain OCC of length 4 and a frequency-domain OCC of length 2. The 2 frequency-domain subcarriers occupied by each CDM group can be three consecutive adjacent subcarriers (e.g., the nth and n+1th subcarriers) or two subcarriers spaced 11 apart (e.g., the nth and n+12th subcarriers).

[0153] In some embodiments, when at least one set of REs is mapped onto the time domain of the first transmission resource, the reference signals within the same code division multiplexing group occupy the same or different indices of the subcarriers in adjacent RE sets in the time domain.

[0154] For example, if, based on service requirements, the density of RE sets needs to be increased in the time domain on the first transmission resource (i.e., at least one RE set is mapped to the time domain of the first transmission resource), the subcarrier index occupied by each port in the (n+1)th RE set in the time domain can be the same as or different from the subcarrier index occupied by the same port in the nth RE set. For instance, the subcarrier indices occupied by multiple CDM groups in the (n+1)th RE set can be interchanged with those occupied by multiple CDM groups in the nth RE set, resulting in an interleaved distribution in the time domain. This facilitates better tracking of channel changes in the frequency domain.

[0155] For example, such as Figure 22 As shown, when the system supports a maximum of 4 ports, the 4 subcarriers in the frequency domain form one RE set. The subcarrier indices occupied by the two CDM groups (denoted as CDM group#0 and CDM group#1 in the diagram) in the RE set of the (n+1)th symbol in the time domain can be interchanged with the subcarrier indices occupied by the two CDM groups in the RE set of the nth symbol, resulting in an interleaved distribution across different symbols. For example... Figure 23 As shown in Figure 24, when the maximum number of ports supported by the system is 6, the 6 subcarriers in the frequency domain form a RE set. The subcarrier indices occupied by 2 or 3 CDM groups in the RE set of the (n+1)th symbol in the time domain can be swapped with the subcarrier indices occupied by 2 or 3 CDM groups in the RE set of the nth symbol (denoted as CDM group#0, CDM group#1 and CDMgroup#2 in the figure), and are distributed alternately on different symbols.

[0156] In some embodiments, the reference signal configuration parameters include at least one of the following: dynamic indication, static indication, time slot index, symbol index, and CDM group index, wherein the static indication value is related to the CDM group index.

[0157] For example, the basis sequence r(n) of the reference signal is generated by the following formula:

[0158]

[0159] Where c(i) is a pseudo-random sequence, which is based on the initial value c. init Determined, initial value c init Determined by the following formula:

[0160]

[0161] in, This indicates the number of symbols in each slot. `l` is the slot index of the intra-frame reference signal, and `l` is the OFDM symbol index of the reference signal within the slot. When data and reference signals are transmitted in superimposed form, the value of `l` can be any OFDM symbol within the slot. The dynamic indicator in the configuration parameters of the reference signal sequence only refers to... Static indication refers to It is a CDM index. and It can be generated according to the current protocol, but and The value of needs to be constrained, as follows:

[0162] If the high-level parameter dmrs-Downlink is provided in DMRS-DownlinkConfig IE:

[0163]

[0164] In this disclosure, the value of λ may belong to the set {0,1,2,3,4,5,6,7,8,9,10,11}.

[0165] The reference signals of K1 ports can also be transmitted on each RE set in another way, where the reference signal of each of the K1 ports occupies one RE in each RE set, and the reference signals of different ports are interleaved in the RE set.

[0166] In some embodiments, for each set of REs, the reference signals of all ports in the K1 ports occupy N1 subcarriers in the frequency domain, and K1 equals N1; or, for each set of REs, the reference signals of all ports in the K1 ports occupy N1 subcarriers and N2 time-domain symbols in the frequency domain, and K1 equals the product of N1 and N2.

[0167] For example, such as Figure 25 As shown, when the system supports a maximum of 4 or 6 ports, the RE set consists of 4 or 6 subcarriers in the frequency domain. Each port (represented as Layer 1-4DMRS or each LayerDMRS in Layer 1-6DMRS in the diagram) occupies one RE. A consecutive set of 4 or 6 subcarriers (i.e., the RE within a bold black box in the diagram) constitutes a RE set, with different numbers indicating the REs occupied by different ports. This set is then overlaid and transmitted with data from 4 or 6 layers (i.e., Layer 1-4DATA or Layer 1-6DATA in the diagram).

[0168] For example, such as Figure 26 As shown, when the system supports a maximum of 8 or 12 ports, the RE set occupies 2 consecutive symbols in the time domain and 4 or 6 subcarriers in the frequency domain. Each port occupies one RE (that is, each Layer DMRS in Layer 1-8 or Layer 1-12 DMRS in the figure occupies one RE). The RE in a black bold box in the figure is a RE set, and different numbers inside indicate the RE occupied by different ports. Then it is superimposed and transmitted with the data of 8 or 12 layers (that is, Layer 1-8DATA or Layer 1-12DATA in the figure).

[0169] For example, such as Figure 27As shown, when the system supports a maximum of 16 or 24 ports, the RE set occupies two consecutive symbols in the time domain and 8 or 12 subcarriers in the frequency domain. Each port (i.e., each Layer DMRS in Layer 1-16 or Layer 1-24 DMRS in the figure) occupies one RE. An RE within a bold black box in the figure represents a RE set, with different numbers indicating the REs occupied by different ports. This data is then overlaid and transmitted with the data from 16 or 24 layers (i.e., Layer 1-16 DATA or Layer 1-24 DATA in the figure).

[0170] For example, such as Figure 28 As shown, when the system supports a maximum of 32 or 48 ports, the RE set occupies two consecutive symbols in the time domain and 16 or 24 subcarriers in the frequency domain. Each port (i.e., each Layer DMRS in Layer 1-32 or Layer 1-28 DMRS in the figure) occupies one RE. An RE within a bold black box in the figure represents a RE set, with different numbers indicating the REs occupied by different ports. This data is then overlaid and transmitted with the data from 32 or 48 layers (i.e., Layer 1-32 DATA or Layer 1-28 DATA in the figure).

[0171] For example, such as Figure 29 As shown, when the system supports a maximum of 64 or 96 ports, the RE set occupies 4 consecutive symbols in the time domain and 16 or 24 subcarriers in the frequency domain. Each port (i.e., each Layer DMRS in Layer 1-64 or Layer 1-96 DMRS in the figure) occupies one RE. The RE in the bold black box is a set of REs, and different numbers within it indicate the REs occupied by different ports. This data is then overlaid and transmitted with the data from 64 or 96 layers (i.e., Layer 1-64 DATA or Layer 1-96 DATA in the figure).

[0172] In some embodiments, when at least one set of REs is mapped onto the time domain of the first transmission resource, the reference signals of the same port occupy the same or different subcarrier indices in REs with adjacent time domain indices.

[0173] For example, if the density of RE sets needs to be increased in the time domain according to service requirements on the first transmission resource (i.e., at least one RE set is mapped to the time domain of the first transmission resource), the subcarrier index occupied by each port in the (n+1)th RE set in the time domain can be the same as or different from the subcarrier index occupied by the same port in the nth RE set. For example, the subcarrier indices occupied by multiple ports in the (n+1)th RE set can be interchanged with the subcarrier indices occupied by multiple ports in the nth RE set, and distributed interleaved in the time domain. This is beneficial for better tracking of channel changes in the frequency domain.

[0174] In some embodiments, the reference signal configuration parameters include at least one of the following: dynamic indication, static indication, time slot index, symbol index, and port index.

[0175] For example, the basis sequence r(n) of the reference signal is generated by the following formula:

[0176]

[0177] Where c(i) is a pseudo-random sequence, which is based on the initial value c. init Determined, initial value c init Determined by the following formula:

[0178]

[0179] in, This indicates the number of symbols in each slot. is the time slot index where the reference signal is located within the wireless frame, and l is the OFDM symbol index where the reference signal is located within the time slot. When data and reference signals are transmitted in superimposed form, the value of l may be any OFDM symbol within the time slot. and It is related to a certain port index, and the value is obtained in the following way:

[0180] or Indicated in DCI;

[0181] and The possible values ​​are as follows:

[0182] If the high-level parameter dmrs-Downlink is provided in DMRS-DownlinkConfig IE:

[0183]

[0184] c generated by the reference signal sequence init Add to value This is to make the reference signal base sequence different on different ports, thereby reducing the peak-to-average power ratio (PAPR).

[0185] In some embodiments, the type of orthogonal matrix corresponding to the orthogonal codeword used in the reference signal is determined based on the length of the orthogonal codeword, and the type of orthogonal matrix includes discrete Fourier transform (DFT) orthogonal matrix and / or Hadamard orthogonal matrix.

[0186] In some embodiments, when the length of the orthogonal codeword is a power of the first value, the type of the orthogonal matrix corresponding to the orthogonal codeword is a DFT orthogonal matrix or a Hadamard orthogonal matrix; when the length of the orthogonal codeword is not a power of the first value, the type of the orthogonal matrix corresponding to the orthogonal codeword is a DFT orthogonal matrix.

[0187] For example, the orthogonal codewords above can be obtained using a mathematically complete orthogonal code generation algorithm, with different orthogonal codewords selected depending on the codeword length. Specifically, for codewords of length k where k is not a power of 2, the orthogonal codeword can be obtained from a k×k DFT orthogonal matrix; for codewords of length k where k is a power of 2, the orthogonal codeword can be obtained from a k×k Hadamard orthogonal matrix or a DFT matrix.

[0188] The orthogonal codewords used in this disclosure have lengths of 2, 3, 4, 6, 8, and 12, and their corresponding orthogonal codewords are as follows:

[0189] Orthogonal codewords of length 2: [1 1], [1 -1].

[0190] Orthogonal codeword of length 3: [1 1 1],

[0191] Orthogonal codewords of length 4: [1 1 1 1], [1 -1 1 -1], [1 1 -1-1], [1 -1-1 1]; or [1 11 1], [1j-1-j], [1 -1 1 -1], [1-j-1j].

[0192] The orthogonal codeword of length 6 is:

[0193]

[0194] The orthogonal codeword of length 8 is:

[0195] or

[0196] The orthogonal codeword of length 12 is:

[0197]

[0198] This disclosure provides a signal transmission method applied to a second node. For example... Figure 30 As shown, the method includes the following steps:

[0199] S201. Receive reference signals corresponding to K1 ports on the first transmission resource, and receive data from K2 layers on the second transmission resource.

[0200] The first transmission resource includes a set of K3 resource elements (REs); each RE in the RE set is mapped to the first transmission resource in a frequency-domain priority manner; at least one of the time-domain, frequency-domain, and code-domain resources corresponding to the K1 ports is different. K1, K2, and K3 are positive integers.

[0201] In some embodiments, the RE set is the smallest hourly frequency resource unit that supports the transmission of reference signals corresponding to K1 ports. The RE set includes N1 subcarriers in the frequency domain and N2 time-domain symbols in the time domain, where N1 is less than or equal to K, N2 is less than or equal to M, and K and M are positive integers.

[0202] In some embodiments, the frequency-domain-first mapping method is that the REs in the RE set are first mapped to the N1 subcarriers of the i-th symbol, and then mapped to the N1 subcarriers of the (i+1)-th symbol, where i is a non-negative integer.

[0203] In some embodiments, the RE set is mapped onto the first transmission resource K4 times consecutively in the frequency domain, where K4 is an integer and N1*K4 equals the total number of subcarriers occupied by the first transmission resource.

[0204] In some embodiments, the distribution density of RE sets in the time domain is determined jointly by a preset configuration table and first indication information. The preset configuration table includes the correspondence between at least two of the following: the number of symbols occupied by each RE set in the time domain, the time domain density indication value, and the symbol positions occupied by each RE set in the time domain. The first indication information is carried in the control information.

[0205] In some embodiments, the first transmission resource and the second transmission resource partially or completely overlap, the second transmission resource occupies the same number of subcarriers as the first transmission resource, and the second transmission resource occupies a number of symbols greater than or equal to the first transmission resource.

[0206] In some embodiments, for each RE set, the reference signals of all ports in the K1 ports are code-division multiplexed in the RE set.

[0207] In some embodiments, for each RE set, the reference signals of K1 ports are divided into L code division multiplexing groups. The reference signals within the same code division multiplexing group are multiplexed on the same time-frequency resources in the RE set using frequency-domain orthogonal codes, or frequency-domain and time-domain orthogonal codes. The reference signals within different code division multiplexing groups occupy different time-frequency resources in the RE set. Here, L is a positive integer.

[0208] In some embodiments, for each set of REs, the reference signal of each of the K1 ports occupies one RE, and the reference signals of different ports are interleaved in the set of REs.

[0209] In some embodiments, when the distribution density of the K3 RE sets in the time domain is greater than a preset value, a second indication information is sent. The second indication information is used to indicate that the phase tracking reference signal should be stopped, and the second indication information is carried in the control information.

[0210] For a more detailed description of S201 above, as well as a more detailed description of each technical feature therein, and a description of the beneficial effects, please refer to the description in the above embodiments or examples, which will not be repeated here.

[0211] The foregoing primarily describes the solutions of the embodiments of this disclosure from a methodological perspective. A communication device is also illustrated below for executing the signal transmission methods in any of the above embodiments and their possible implementations. It is understood that the communication device, in order to implement the signal transmission methods, includes hardware structures and / or software modules corresponding to the execution of various functions. Those skilled in the art should readily recognize that, in conjunction with the algorithm steps of the various examples described in the embodiments of this disclosure, this disclosure can be implemented in hardware or a combination of hardware and computer software. Whether a function is executed in hardware or by computer software driving hardware depends on the target application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each target application, but such implementation should not be considered beyond the scope of this disclosure.

[0212] This disclosure embodiment can divide the communication device into functional modules according to the above method embodiment. For example, each function can be divided into a separate functional module, or two or more functions can be integrated into one functional module. The integrated module can be implemented in hardware or software. It should be noted that the module division in this disclosure embodiment is illustrative and only represents one logical functional division. In actual implementation, there may be other division methods. The following description uses the example of dividing each functional module according to each function.

[0213] Figure 31This is a communication device provided in an embodiment of the present disclosure, applied to a first node. The communication device 30 includes a processing module 31 and a communication module 32.

[0214] Processing module 31 is used to determine the first transmission resource and the second transmission resource;

[0215] The communication module 32 is used to transmit reference signals corresponding to K1 ports on the first transmission resource and transmit data of K2 layers on the second transmission resource; wherein, the first transmission resource includes a set of K3 resource units (REs); each RE in the RE set is mapped to the first transmission resource in a frequency-domain priority manner; at least one of the time-domain, frequency-domain, and code-domain resources corresponding to the K1 ports is different; wherein, K1, K2, and K3 are positive integers.

[0216] In some embodiments, the RE set is the smallest hourly frequency resource unit that supports the transmission of reference signals corresponding to K1 ports. The RE set includes N1 subcarriers in the frequency domain and N2 time-domain symbols in the time domain, where N1 is less than or equal to K, N2 is less than or equal to M, and K and M are positive integers.

[0217] In some embodiments, the frequency-domain-first mapping method is that the REs in the RE set are first mapped to the N1 subcarriers of the i-th symbol, and then mapped to the N1 subcarriers of the (i+1)-th symbol, where i is a non-negative integer.

[0218] In some embodiments, the RE set is mapped onto the first transmission resource K4 times consecutively in the frequency domain, where K4 is an integer and N1*K4 equals the total number of subcarriers occupied by the first transmission resource.

[0219] In some embodiments, the distribution density of RE sets in the time domain is determined by a preset configuration table and first indication information. The preset configuration table includes the correspondence between at least two of the following: the number of symbols occupied by each RE set in the time domain, the time domain density indication value, and the symbol positions occupied by each RE set in the time domain. The first indication information is carried in the control information.

[0220] In some embodiments, the first transmission resource and the second transmission resource partially or completely overlap, the second transmission resource occupies the same number of subcarriers as the first transmission resource, and the second transmission resource occupies a number of symbols greater than or equal to the first transmission resource.

[0221] In some embodiments, for each RE set, reference signal code division multiplexing is performed on all ports in K1 ports.

[0222] In some embodiments, the reference signals of all ports in K1 ports are orthogonal codewords of length H1 in the frequency domain and orthogonal codewords of length H2 in the time domain, where H1 is a positive integer, H2 is a non-negative integer, and H1 is greater than or equal to H2, wherein the values ​​of H1 and H2 are associated with K1.

[0223] In some embodiments, for each RE set, the reference signals of K1 ports are divided into L code division multiplexing groups. The reference signals in the same code division multiplexing group are multiplexed on the same time-frequency resources in the RE set using frequency domain orthogonal codes, or frequency domain and time domain orthogonal codes. The reference signals of different code division multiplexing groups occupy different time-frequency resources in the RE set; where L is a positive integer.

[0224] In some embodiments, the reference signal within the same code division multiplexing group in the L code division multiplexing groups supports K1 ports in the frequency domain using an orthogonal codeword of H3, where H3 is a positive integer and K1 is equal to the product of L and H3; the reference signal within the same code division multiplexing group in the L code division multiplexing groups supports K1 ports using an orthogonal codeword of H3 in the frequency domain and an orthogonal codeword of H4 in the time domain, where H3 and H4 are positive integers and K1 is equal to the product of L, H3 and H4.

[0225] In some embodiments, for each RE set, the frequency domain resources occupied by the reference signal within the same code division multiplexing group in the RE set include multiple subcarriers, which are either consecutive or spaced apart in the frequency domain.

[0226] In some embodiments, for each RE set, the reference signal within the same code division multiplexing group occupies one or more consecutive time-domain symbols in the time domain of the RE set.

[0227] In some embodiments, when at least one set of REs is mapped onto the time domain of the first transmission resource, the reference signals within the same code division multiplexing group occupy the same or different indices of the subcarriers in adjacent RE sets in the time domain.

[0228] In some embodiments, the type of orthogonal matrix corresponding to the orthogonal codeword used in the reference signal is determined based on the length of the orthogonal codeword, and the type of orthogonal matrix includes Discrete Fourier Transform (DFT) orthogonal matrix and / or Hadamard orthogonal matrix.

[0229] In some embodiments, when the length of the orthogonal codeword is a power of the first value, the type of the orthogonal matrix corresponding to the orthogonal codeword is a DFT orthogonal matrix or a Hadamard orthogonal matrix; when the length of the orthogonal codeword is not a power of the first value, the type of the orthogonal matrix corresponding to the orthogonal codeword is a DFT orthogonal matrix.

[0230] In some embodiments, for each set of REs, the reference signal of each of the K1 ports occupies one RE, and the reference signals of different ports are interleaved in the set of REs.

[0231] In some embodiments, when at least one set of REs is mapped onto the time domain of the first transmission resource, the reference signals of the same port occupy the same or different subcarrier indices in REs with adjacent time domain indices.

[0232] In some embodiments, for each set of REs, the reference signals of all ports in the K1 ports occupy N1 subcarriers in the frequency domain, and K1 equals N1; or, for each set of REs, the reference signals of all ports in the K1 ports occupy N1 subcarriers and N2 time-domain symbols in the frequency domain, and K1 equals the product of N1 and N2.

[0233] In some embodiments, the signal sequence of the reference signal is determined based on a base sequence or based on a base sequence and an orthogonal code, and the base sequence is determined based on a pseudo-random sequence, the value of which is related to the initial value of the pseudo-random sequence.

[0234] In some embodiments, the initial value of the pseudo-random sequence is determined based on reference signal configuration parameters, which include at least one of the following: dynamic indicator, static indicator, time slot index, symbol index, code division multiplexing group index, and port index.

[0235] In some embodiments, the communication module 32 is used to send a second indication information when the distribution density of the K3 RE sets in the time domain is greater than a preset value. The second indication information is used to indicate that the phase tracking reference signal should be stopped. The second indication information is carried in the control information.

[0236] For a more detailed description of the processing module 31 and the communication module 32, as well as a more detailed description of their respective technical features and beneficial effects, please refer to the corresponding method embodiment section above, which will not be repeated here.

[0237] Figure 32 This is a communication device provided in an embodiment of the present disclosure, applied to a second node. The communication device 40 includes: a communication module 41.

[0238] The communication module 41 is used to receive reference signals corresponding to K1 ports on the first transmission resource and to receive data from K2 layers on the second transmission resource; wherein, the first transmission resource includes a set of K3 resource elements RE; each RE in the RE set is mapped to the first transmission resource in a frequency-domain priority manner; at least one of the time-domain, frequency-domain, and code-domain resources corresponding to the K1 ports is different; wherein, K1, K2, and K3 are positive integers.

[0239] For a more detailed description of the communication module 41, its various technical features, and its beneficial effects, please refer to the corresponding method embodiment section above, which will not be repeated here.

[0240] It should be noted that, Figure 31 , Figure 32 Modules in a module can also be called units; for example, a communication module can be called a communication unit. Additionally, in... Figure 31 , Figure 32 In the embodiments shown, the names of the modules may not be the same as those shown in the figures. For example, the communication module may also be called the sending module or the receiving module.

[0241] Figure 31 , Figure 32 If the various units or modules in the present disclosure are implemented as software functional modules and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solutions of the embodiments of this disclosure, or the parts that contribute to related technologies, or all or part of the technical solutions, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) or processor to execute all or part of the steps of the methods of the various embodiments of this disclosure. Storage media for storing computer software products include various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0242] In implementing the functions of the integrated modules described above using hardware, this disclosure also provides a possible structure for a communication device used to execute the signal transmission method provided in this disclosure. Figure 33 As shown, the communication device 500 includes a communication interface 503, a processor 502, and a bus 504. Optionally, the communication device may also include a memory 501.

[0243] Processor 502 may implement or execute various exemplary logic blocks, modules, and circuits described in conjunction with embodiments of this disclosure. Processor 502 may be a central processing unit, a general-purpose processor, a digital signal processor, an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It may implement or execute various exemplary logic blocks, modules, and circuits described in conjunction with embodiments of this disclosure. Processor 502 may also be a combination that implements computing functions, such as including one or more microprocessor combinations, a combination of a DSP and a microprocessor, etc.

[0244] Communication interface 503 is used to connect to other devices via a communication network. This communication network can be Ethernet, wireless access network, wireless local area network (WLAN), etc.

[0245] The memory 501 may be a read-only memory (ROM) or other type of static storage device capable of storing static information and instructions, random access memory (RAM) or other type of dynamic storage device capable of storing information and instructions, or electrically erasable programmable read-only memory (EEPROM), disk storage medium or other magnetic storage device, or any other medium capable of carrying or storing desired program code in the form of instructions or data structures and accessible by a computer, but is not limited thereto.

[0246] In one possible implementation, the memory 501 can exist independently of the processor 502. The memory 501 can be connected to the processor 502 via a bus 504 and is used to store instructions or program code. When the processor 502 calls and executes the instructions or program code stored in the memory 501, it can implement the signal transmission method provided in the embodiments of this disclosure.

[0247] In another possible implementation, the memory 501 can also be integrated with the processor 502.

[0248] Bus 504 can be an extended industry standard architecture (EISA) bus, etc. Bus 504 can be divided into address bus, data bus, control bus, etc. For ease of representation, Figure 33 The bus is represented by a single thick line, but this does not mean that there is only one bus or one type of bus.

[0249] Some embodiments of this disclosure provide a computer-readable storage medium (e.g., a non-transitory computer-readable storage medium) storing computer program instructions that, when executed on a computer, cause the computer to perform a signal transmission method as described in any of the above embodiments.

[0250] In one exemplary embodiment, the computer may be the aforementioned communication device, and this disclosure does not limit the specific form of the computer.

[0251] In some examples, the aforementioned computer-readable storage media may include, but are not limited to: magnetic storage devices (e.g., hard disks, floppy disks, or magnetic tapes), optical discs (e.g., compact disks (CDs), digital versatile disks (DVDs), etc.), smart cards, and flash memory devices (e.g., erasable programmable read-only memory (EPROMs), cards, sticks, or key drives, etc.). The various computer-readable storage media described in this disclosure may represent one or more devices and / or other machine-readable storage media for storing information. The term "machine-readable storage media" may include, but is not limited to, wireless channels and various other media capable of storing, containing, and / or carrying instructions and / or data.

[0252] This disclosure provides a computer program product containing instructions that, when run on a computer, cause the computer to perform the signal transmission method described in any of the above embodiments.

[0253] The above description is merely a specific embodiment of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any changes or substitutions within the technical scope disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A signal transmission method, characterized in that, Applied to the first node, the method includes: Determine the first transmission resource and the second transmission resource; Reference signals corresponding to K1 ports are transmitted on the first transmission resource, and data of K2 layers are transmitted on the second transmission resource; wherein, the first transmission resource includes a set of K3 resource units (REs); each RE in the set is mapped to the first transmission resource in a frequency-domain priority manner; at least one of the time-domain, frequency-domain, and code-domain resources corresponding to the K1 ports is different; wherein, K1, K2, and K3 are positive integers.

2. The method according to claim 1, characterized in that, The RE set is the minimum hourly frequency resource unit that supports the transmission of reference signals corresponding to K1 ports. The RE set includes N1 subcarriers in the frequency domain and N2 time-domain symbols in the time domain, wherein N1 is less than or equal to K, N2 is less than or equal to M, and K and M are positive integers.

3. The method according to claim 1, characterized in that, The frequency-domain-first mapping method is that the REs in the RE set are first mapped to the N1 subcarriers of the i-th symbol, and then mapped to the N1 subcarriers of the (i+1)-th symbol, where i is a non-negative integer.

4. The method according to claim 2, characterized in that, The RE set is mapped onto the first transmission resource K4 times consecutively in the frequency domain, where K4 is an integer and N1*K4 is equal to the total number of subcarriers occupied by the first transmission resource.

5. The method according to claim 1, characterized in that, The distribution density of the RE set in the time domain is determined by a preset configuration table and a first indication information. The preset configuration table includes the correspondence between at least two of the following: the number of symbols occupied by each RE set in the time domain, the time domain density indication value, and the symbol positions occupied by each RE set in the time domain. The first indication information is carried in the control information.

6. The method according to claim 1, characterized in that, The first transmission resource and the second transmission resource partially or completely overlap, the second transmission resource occupies the same number of subcarriers as the first transmission resource, and the second transmission resource occupies a number of symbols greater than or equal to the first transmission resource.

7. The method according to claim 1, characterized in that, For each set of REs, the reference signal code division multiplexing is performed on all ports in the K1 ports.

8. The method according to claim 7, characterized in that, The reference signals of all ports in the K1 ports are orthogonal codewords of length H1 in the frequency domain and orthogonal codewords of length H2 in the time domain, where H1 is a positive integer, H2 is a non-negative integer, and H1 is greater than or equal to H2. The values ​​of H1 and H2 are associated with K1.

9. The method according to claim 1, characterized in that, For each set of REs, the reference signals of the K1 ports are divided into L code division multiplexing groups. The reference signals in the same code division multiplexing group are multiplexed on the same time-frequency resources in the set of REs using frequency domain orthogonal codes or frequency domain and time domain orthogonal codes. The reference signals of different code division multiplexing groups occupy different time-frequency resources in the set of REs; where L is a positive integer.

10. The method according to claim 9, characterized in that, The reference signals within the same code division multiplexing group in the L code division multiplexing groups support K1 ports in the frequency domain using orthogonal codewords of H3, where H3 is a positive integer and K1 is equal to the product of L and H3; the reference signals within the same code division multiplexing group in the L code division multiplexing groups support K1 ports using orthogonal codewords of H3 in the frequency domain and orthogonal codewords of H4 in the time domain, where H3 and H4 are positive integers and K1 is equal to the product of L, H3 and H4.

11. The method according to claim 9, characterized in that, For each set of REs, the frequency domain resources occupied by the reference signal in the same code division multiplexing group in the set of REs include multiple subcarriers, which are either continuous or spaced apart in the frequency domain.

12. The method according to claim 9, characterized in that, For each RE set, the reference signal within the same code division multiplexing group occupies one or more consecutive time-domain symbols in the time domain of the RE set.

13. The method according to claim 9, characterized in that, When at least one of the RE sets is mapped to the time domain of the first transmission resource, the reference signals within the same code division multiplexing group occupy the same or different subcarrier indices in RE sets with adjacent time domain indices.

14. The method according to claim 7 or 9, characterized in that, The type of orthogonal matrix corresponding to the orthogonal codeword used in the reference signal is determined based on the length of the orthogonal codeword, and the type of the orthogonal matrix includes Discrete Fourier Transform (DFT) orthogonal matrix and / or Hadamard orthogonal matrix.

15. The method according to claim 14, characterized in that, When the length of the orthogonal codeword is a power of the first value, the orthogonal matrix corresponding to the orthogonal codeword is of type DFT orthogonal matrix or Hadamard orthogonal matrix; If the length of the orthogonal codeword is not a power of the first value, the orthogonal matrix corresponding to the orthogonal codeword is of type DFT orthogonal matrix.

16. The method according to claim 1, characterized in that, For each set of REs, the reference signal of each of the K1 ports occupies one RE, and the reference signals of different ports are interleaved in the set of REs.

17. The method according to claim 16, characterized in that, When at least one of the RE sets is mapped to the time domain of the first transmission resource, the reference signals of the same port occupy the same or different subcarrier indices in RE sets with adjacent time domain indices.

18. The method according to claim 16, characterized in that, For each set of REs, the reference signals of all ports in the K1 ports occupy N1 subcarriers in the frequency domain, and K1 equals N1; or, for each set of REs, the reference signals of all ports in the K1 ports occupy N1 subcarriers and N2 time-domain symbols in the frequency domain, and K1 equals the product of N1 and N2.

19. The method according to claim 1, characterized in that, The signal sequence of the reference signal is determined based on a base sequence or based on a base sequence and an orthogonal code, and the base sequence is determined based on a pseudo-random sequence, the value of which is related to the initial value of the pseudo-random sequence.

20. The method according to claim 19, characterized in that, The initial value of the pseudo-random sequence is determined based on reference signal configuration parameters, which include at least one of the following: dynamic indicator, static indicator, time slot index, symbol index, code division multiplexing group index, and port index.

21. The method according to claim 1, characterized in that, The method further includes: If the distribution density of the K3 RE sets in the time domain is greater than a preset value, a second indication message is sent. The second indication message is used to indicate that the phase tracking reference signal should be stopped. The second indication message is carried in the control information.

22. A signal transmission method, characterized in that, Applied to the second node, the method includes: The system receives reference signals corresponding to K1 ports on a first transmission resource and data from K2 layers on a second transmission resource. The first transmission resource includes a set of K3 resource elements (REs). Each RE in the set is mapped to the first transmission resource in a frequency-domain priority manner. At least one of the time-domain, frequency-domain, and code-domain resources corresponding to the K1 ports is different. K1, K2, and K3 are positive integers.

23. The method according to claim 22, characterized in that, The RE set is the minimum hourly frequency resource unit that supports the transmission of reference signals corresponding to K1 ports. The RE set includes N1 subcarriers in the frequency domain and N2 time-domain symbols in the time domain, wherein N1 is less than or equal to K, N2 is less than or equal to M, and K and M are positive integers.

24. The method according to claim 22, characterized in that, The frequency-domain-first mapping method is that the REs in the RE set are first mapped to the N1 subcarriers of the i-th symbol, and then mapped to the N1 subcarriers of the (i+1)-th symbol, where i is a non-negative integer.

25. The method according to claim 23, characterized in that, The RE set is mapped onto the first transmission resource K4 times consecutively in the frequency domain, where K4 is an integer and N1*K4 is equal to the total number of subcarriers occupied by the first transmission resource.

26. The method according to claim 22, characterized in that, The distribution density of the RE set in the time domain is determined by a preset configuration table and a first indication information. The preset configuration table includes the correspondence between at least two of the following: the number of symbols occupied by each RE set in the time domain, the time domain density indication value, and the symbol positions occupied by each RE set in the time domain. The first indication information is carried in the control information.

27. The method according to claim 22, characterized in that, The second transmission resource occupies the same number of subcarriers as the first transmission resource, the second transmission resource occupies a number of symbols greater than or equal to the first transmission resource, and the first transmission resource and the second transmission resource partially or completely overlap.

28. The method according to claim 22, characterized in that, For each of the RE sets, the reference signals of all ports in the K1 ports are code-division multiplexed in the RE set.

29. The method according to claim 22, characterized in that, For each set of REs, the reference signals of the K1 ports are divided into L code division multiplexing groups. The reference signals in the same code division multiplexing group are multiplexed on the same time-frequency resources in the set of REs using frequency domain orthogonal codes or frequency domain and time domain orthogonal codes. The reference signals in different code division multiplexing groups occupy different time-frequency resources in the set of REs; where L is a positive integer.

30. The method according to claim 22, characterized in that, For each set of REs, the reference signal of each of the K1 ports occupies one RE, and the reference signals of different ports are interleaved in the set of REs.

31. The method according to claim 22, characterized in that, The method further includes: If the distribution density of the K3 RE sets in the time domain is greater than a preset value, a second indication message is sent. The second indication message is used to indicate that the phase tracking reference signal should be stopped. The second indication message is carried in the control information.

32. A communication device, characterized in that, include: Memory and processor; Memory and processor are coupled; The memory is used to store instructions that can be executed by the processor; When the processor executes the instructions, it performs the method as described in any one of claims 1 to 31.

33. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions that, when executed on a communication device, cause the communication device to perform the method as described in any one of claims 1 to 31.

34. A computer program product, characterized in that, When the computer program product is executed, it implements the method as described in any one of claims 1 to 31.

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