Communication method and apparatus, and storage medium and program product

Abstract

Provided in the present disclosure are a communication method and apparatus, and a storage medium and a program product. The communication method comprises: determining a reference signal pattern on the basis of channel state information, wherein the reference signal pattern comprises frequency domain description information and / or time domain description information for transmitting a reference signal on at least one layer; and on a transmission resource indicated by the reference signal pattern, sending the reference signal on the at least one layer and data on the at least one layer.

Description

Communication methods and devices, storage media, and software products

[0001] This disclosure claims priority to Chinese patent application No. 202411017428.7, filed on July 26, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This disclosure relates to the field of communication technology, and in particular to a communication method and apparatus, a storage medium, and a program product. Background Technology

[0003] As the demand for transmission rates in wireless communication systems continues to rise, larger-scale antenna arrays will be used in non-systematic systems. The use of large-scale antenna arrays increases spatial freedom, enabling wireless communication systems to support multiplexing of more data layers, thereby achieving more efficient transmission. Summary of the Invention

[0004] On the one hand, a communication method is provided, applied to the first node. This communication method includes:

[0005] The reference signal pattern is determined based on the channel state information. The reference signal pattern includes frequency domain description information and / or time domain description information for transmitting reference signals at at least one layer.

[0006] Transmit at least one layer of reference signal and at least one layer of data on the transmission resources indicated by the reference signal pattern.

[0007] On the other hand, a communication method is provided for use on a second node. This communication method includes:

[0008] Obtain a reference signal pattern, which includes frequency domain description information and / or time domain description information for transmitting reference signals at at least one layer. The reference signal pattern is determined based on channel state information.

[0009] Receive at least one layer of reference signal and at least one layer of data on the transmission resources indicated by the reference signal pattern.

[0010] On another front, a communication device is provided for use at a first node. This communication device includes a processing module and a communication module, wherein:

[0011] The processing module is used to determine a reference signal pattern based on channel state information. The reference signal pattern includes frequency domain description information and / or time domain description information for transmitting reference signals at at least one layer.

[0012] The communication module is used to transmit at least one layer of reference signal and at least one layer of data on the transmission resources indicated by the reference signal pattern.

[0013] On another front, a communication device is provided for use in a second node. This communication device includes a communication module, wherein:

[0014] The communication module is used to acquire a reference signal pattern, which includes frequency domain description information and / or time domain description information for transmitting reference signals at least one layer. The reference signal pattern is determined based on channel state information.

[0015] The communication module is also used to receive reference signals and data on at least one layer on the transmission resources indicated by the reference signal pattern.

[0016] In another aspect, a communication device is provided. The communication device includes: 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; the processor, when executing the computer program instructions, implements the communication method described in any of the preceding aspects.

[0017] 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 communication method described in any of the above aspects.

[0018] In another aspect, a computer program product is provided, which includes computer program instructions that, when executed, implement the communication method described in any of the preceding aspects. Attached Figure Description

[0019] Figure 1 is a schematic diagram of the structure of a communication system according to an embodiment of the present disclosure.

[0020] Figure 2 is a flowchart of a communication method according to an embodiment of the present disclosure.

[0021] Figure 3 is a schematic diagram of the index distribution of REs in two PRBs according to embodiments of the present disclosure.

[0022] Figure 4 is a schematic diagram of a reference signal pattern according to an embodiment of the present disclosure.

[0023] Figure 5 is a schematic diagram of another reference signal pattern according to an embodiment of the present disclosure.

[0024] Figure 6 is a schematic diagram of another reference signal pattern according to an embodiment of the present disclosure.

[0025] Figure 7 is a schematic diagram of another reference signal pattern according to an embodiment of the present disclosure.

[0026] Figure 8 is a schematic diagram of another reference signal pattern according to an embodiment of the present disclosure.

[0027] Figure 9 is a schematic diagram of another reference signal pattern according to an embodiment of the present disclosure.

[0028] Figure 10 is a schematic diagram of another reference signal pattern according to an embodiment of the present disclosure.

[0029] Figure 11 is a schematic diagram of another reference signal pattern according to an embodiment of the present disclosure.

[0030] Figure 12 is a flowchart of another communication method according to an embodiment of the present disclosure.

[0031] Figure 13 is a schematic diagram of a communication device according to an embodiment of the present disclosure.

[0032] Figure 14 is a schematic diagram of another communication device according to an embodiment of the present disclosure.

[0033] Figure 15 is a schematic diagram of the structure of another communication device according to an embodiment of the present disclosure. Detailed Implementation

[0034] To enable those skilled in the art to better understand the technical solutions of the embodiments of this disclosure, 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. All other embodiments obtained by those skilled in the art based on the embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0035] It should be understood that the specific implementations described herein are for interpreting this disclosure only and are not intended to limit this disclosure.

[0036] In the following description, the use of suffixes such as “module,” “part,” or “unit” to denote elements is solely for the purpose of illustrative purposes and has no particular meaning in itself. Therefore, “module,” “part,” or “unit” may be used interchangeably.

[0037] In the description of this disclosure, unless otherwise stated, the symbol " / " indicates an "or" relationship; for example, A / B can mean A or B. "And / or" in this document merely represents a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can mean: only A, only B, and A and B. 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 the terms "first," "second," etc., do not necessarily imply differences.

[0038] Unless the context otherwise requires, throughout the specification and claims, the term "comprise" and its other forms (e.g., the third-person singular "comprises" and the present participle "comprising") are interpreted as open-ended and encompassing, meaning "including, but not limited to." In the description of the specification, terms such as "one embodiment," "some embodiments," "exemplary embodiments," "example," "specific example," or "some examples" are intended to indicate that a particular feature, structure, material, or characteristic associated with that embodiment or example is included in at least one embodiment or example of this disclosure. The illustrative representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics mentioned may be included in any suitable manner in any one or more embodiments or examples.

[0039] The terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with terms such as "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this disclosure, unless otherwise stated, "a plurality of" means two or more.

[0040] In this disclosure, the terms "exemplarily" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design described as "exemplarily" or "for example" in this disclosure should not be construed as being more preferred or advantageous than other embodiments or designs. Rather, the use of the terms "exemplarily" or "for example" is intended to present the relevant concepts in a specific manner.

[0041] In addition, the use of “based on” implies openness and inclusivity, because processes, steps, calculations or other actions “based on” one or more of the stated conditions or values ​​may in practice be based on additional conditions or values ​​beyond those stated.

[0042] Multi-antenna technology, as a key means to improve the spectral efficiency of wireless communication, is widely used in various wireless communication systems. Multi-antenna technologies include, but are not limited to, multiple-input multiple-output (MIMO), joint transmission (JT), and high-frequency beamforming. To fully unleash the potential of multi-antenna technology and ensure that communication nodes can efficiently utilize these antenna resources and obtain relatively accurate channel information, it is particularly important. Through accurate channel estimation, communication nodes can more intelligently adjust transmission parameters, optimize signal transmission paths, and thus improve the overall transmission efficiency, coverage, and reliability of the system.

[0043] With the ever-increasing demand for transmission rates in mobile communication systems, the future is highly likely to see the deployment of larger-scale antenna arrays. The deployment of larger-scale antenna arrays not only greatly expands spatial freedom but also enables systems to reuse more layers of data for efficient transmission. However, the increase in the number of multiplexing layers also exacerbates the overhead of the reference signal (e.g., DMRS). To address this challenge, an innovative strategy is to transmit data and the reference signal together on the same layer within the same time-frequency resource block. This approach aims to transmit the reference signal without consuming additional time-frequency and spatial resources, thereby effectively improving the performance of the wireless communication system.

[0044] However, it is worth noting that reusing multiple layers of data and reference signals on the same time-frequency resources may lead to mutual interference between the data and reference signals, which may reduce the performance of the wireless communication system. How to reasonably design the transmission resources and other relationships between different layers of data and reference signals to minimize mutual interference between signals in order to perform better channel estimation and obtain better data decoding performance has become an urgent problem to be solved.

[0045] In view of this, this disclosure provides a communication method that determines a reference signal pattern based on channel state information. The reference signal pattern includes frequency domain description information and / or time domain description information for transmitting reference signals at at least one layer. The method then transmits reference signals and data at at least one layer on the transmission resources indicated by the reference signal pattern. In this way, even when a mixed signal of data and reference signals is transmitted at at least one layer, different reference signal patterns can be rationally designed according to different channel state information, allowing the reference signal resources of each layer to occupy different resource units based on the different channel state information. This makes the transmission of reference signals more adaptable to the current channel state information, helps reduce mutual interference between data and reference signals at different layers during transmission, and improves the reception quality of reference signals.

[0046] In contrast to some technologies where the transmission resources (time-frequency resources) of reference signals (such as DMRS) and data are orthogonal, i.e., they do not overlap, this disclosure transmits reference signals and data from one or more layers simultaneously on the transmission resources. In other words, reference signals and data from one or more layers are multiplexed. The transmission resources include, but are not limited to, at least one or more resources from the time domain, frequency domain, code domain, and spatial domain. In some instances, the resource units included in the transmission resources primarily refer to time-domain and / or frequency-domain resources.

[0047] The technical solutions provided in this disclosure can be applied to various mobile communication networks, such as 5G new radio (NR) mobile communication networks, future mobile communication networks (e.g., 6th-generation mobile communication technology, 6G), or multiple communication convergence systems, etc. This disclosure does not limit them.

[0048] In this embodiment of the disclosure, the mobile communication network may include network-side devices (e.g., including but not limited to base stations) and receiving-side devices (e.g., including but not limited to terminals). It should be understood that, in this example, for instance, in the downlink, the first communication node (also referred to as the first communication node device, the first node) may be a base station-side device, and the second communication node (also referred to as the second communication node device, the second node) may be a terminal-side device. In some embodiments, such as in the uplink, the first communication node may also be a terminal-side device, and the second communication node may also be a base station-side device. In some embodiments, such as when two communication nodes are in device-to-device communication, both the first and second communication nodes can be base stations or terminals. Therefore, whether the first and second nodes are base stations or terminals needs to be determined based on the context.

[0049] Figure 1 is a schematic diagram of a communication system provided in an embodiment of this disclosure. As shown in Figure 1, the communication system includes, but is not limited to, a first node 110 and a second node 120. The first node 110 and the second node 120 can transmit and receive wireless signals and perform related interactions.

[0050] In a wireless communication scenario, the first node 110 and the second node 120 communicate via a wireless channel. For example, the first node 110 may be a base station, and the second node 120 a terminal; the base station and the terminal communicate via a wireless channel. Alternatively, the first node 110 may be a wireless router, and the second node 120 a terminal; the wireless router and the terminal communicate via a wireless channel. Another example is that the first node 110 may be a first base station, and the second node 120 a second base station; the first base station and the second base station communicate via a wireless channel. Yet another example is that the first node 110 may be a first terminal, and the second node 120 a second terminal; the first terminal and the second terminal communicate via a wireless channel. Finally, the first node 110 may be a base station, and the second node 120 a repeater; the base station and the repeater communicate via a wireless channel. Finally, the first node 110 may be a repeater, and the second node 120 a terminal; the repeater and the terminal communicate via a wireless channel. For example, node 110 is a first repeater, and node 120 is a second repeater; the first repeater and the second repeater communicate via a wireless channel. Alternatively, node 110 can be a base station, and node 120 a satellite; the satellite and the base station communicate via a wireless channel. Another example: node 110 can be a satellite, and node 120 a base station; the base station and the satellite communicate via a wireless channel. Yet another example: node 110 can be a terminal, and node 120 a satellite; the satellite and the terminal communicate via a wireless channel. Again, node 110 can be a satellite, and node 120 a terminal; the terminal and the satellite communicate via a wireless channel. Finally, node 110 can be ground equipment, and node 120 can be an aircraft; the aircraft and the ground equipment communicate via a wireless channel. Finally, node 110 can be a first aircraft, and node 120 a second aircraft; the first aircraft and the second aircraft communicate via a wireless channel.

[0051] Unless otherwise specified, the terms "first" node, "second" node, "first" method, "second" method, "first" matrix, "second" matrix, "first" part, and "second" part in this disclosure are used for descriptive distinction only and do not represent a sequential or chronological order.

[0052] In this disclosure, the base station can be a base station device in a 4G network, a base station device in a 5G network, or a base station in a future communication system (such as 6G). The base station can include various macro base stations, micro base stations, home base stations (Femtocell or Home eNodeB), wireless remote devices, reconfigurable intelligent surfaces (RISs), routers, wireless fidelity (WIFI) devices, or various network-side devices such as primary cells and secondary cells.

[0053] In this disclosure, the terminal is a device with wireless transceiver capabilities, which can be deployed on land, including indoors or outdoors; on water (e.g., on ships); and in the air (e.g., on airplanes, balloons, and satellites). The terminal can be a mobile phone, tablet computer, computer with wireless transceiver capabilities, virtual reality (VR) terminal, augmented reality (AR) terminal, wireless terminal in industrial control, wireless terminal in self-driving, wireless terminal in remote medical care, wireless terminal in smart grid, wireless terminal in transportation safety, wireless terminal in smart city, wireless terminal in smart home, etc. The embodiments of this disclosure do not limit the application scenarios. The terminal may also be referred to as a 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 disclosed herein are not limited thereto.

[0054] In this disclosure, higher-layer signaling includes, but is not limited to, radio resource control (RRC), media access control control element (MAC CE), and other signaling other than physical layer signaling, such as LPP (LTE (Long Term Evolution) positioning protocol) higher-layer signaling, NRPPa (NR Positioning Protocol A) higher-layer signaling, and LPPa (LTE Positioning Protocol A) higher-layer signaling. Physical layer signaling can also be transmitted between the base station and the terminal, such as downlink physical layer signaling transmitted on the physical downlink control channel (PDCCH) or uplink physical layer signaling transmitted on the physical uplink control channel (PUCCH).

[0055] In this disclosure, the indicators for various resources, also referred to as indexes or identifiers (IDs), are completely equivalent concepts. For example, a resource identifier in a wireless system includes, but is not limited to, one of the following: reference signal resources, reference signal resource groups, reference signal resource configurations, channel state information (CSI) reports, CSI report sets, terminals, base stations, panels, neural network models, sub-neural network models, neural network layers, precoding matrices, beams, transmission methods, transmission methods, reception methods, modules, models, functional modules, functions, etc. The base station can send the identifier of one or a group of resources to the terminal through various higher-layer signaling and / or physical layer signaling. The terminal can send the identifier of one or a group of resources to the base station through various higher-layer signaling and / or physical layer signaling.

[0056] In some embodiments, the indicator or index can be an integer from 0 to D-1, or an integer from 1 to D, where D is the number of resources corresponding to the indicator or index, and D is an integer greater than or equal to 1. In subsequent sections, the starting point of the indicator is set to a minimum of 1, but the starting point of the indicator can be replaced by a minimum of 0.

[0057] In some embodiments, if a value needs to be assigned to an indicator or index iK, iK takes the minimum value of 1 when iK is less than 1. If a value needs to be assigned to an indicator or index i+K, i+K takes the maximum value of D when i+K is greater than D. Other examples or embodiments will not be elaborated upon further. Here, K is a non-negative integer.

[0058] In some embodiments, transmission includes sending or receiving, such as sending data or signals, or receiving data or signals.

[0059] In some embodiments, communication nodes need to transmit reference signals (RS) to calculate channel state information or perform channel estimation. Reference signals include, but are not limited to, channel state information reference signals (CSI-RS), channel state information-interference measurement (CSI-IM), sounding reference signals (SRS), synchronization signals block (SSB), physical broadcast channel (PBCH), synchronization signal block / physical broadcast channel (SSB / PBCH), and DMRS. NZP (non-zero power) CSI-RS can be used to measure channel or interference. CSI-RS can also be used for tracking, called tracking reference signals (CSI-RS for Tracking, TRS), while CSI-IM is generally used to measure interference, and SRS is used to measure uplink channels. Furthermore, the set of resource elements (REs) included in the time-frequency resources used to transmit reference signals is called reference signal resources, such as CSI-RS resource, SRS resource, CSI-IM resource, and SSB resource. In this document, SSB includes synchronization signal blocks and / or physical broadcast channels.

[0060] In some embodiments, a time instance represents a time period, such as a time slot, which can be a time slot, a mini-slot, or a group of symbols. A time slot or mini-slot includes at least one symbol. A symbol refers to a time unit within a subframe, frame, or time slot, and the unit can be milliseconds, microseconds, nanoseconds, seconds, etc. For example, a symbol can be an orthogonal frequency division multiplexing (OFDM) symbol, a single-carrier frequency division multiple access (SC-FDMA) symbol, an orthogonal frequency division multiple access (OFDMA) symbol, or symbols corresponding to various new waveforms in future communication systems. In some embodiments, the time slot used can also be replaced by a time instance.

[0061] In some embodiments, the smallest transmission unit carrying a modulation symbol is a resource element (RE), which includes a frequency domain subcarrier and a time-frequency resource on the symbol. A time-frequency resource consisting of multiple symbols and multiple subcarriers constitutes a physical resource block (PRB). A reference signal pattern includes at least one RE, and the reference signal is transmitted only on fixed REs pre-configured by the base station; this is called a pattern, such as a DMRS pattern.

[0062] In some embodiments, the reference signal pattern is time-domain and / or frequency-domain location description information of the transmission resources of the reference signal on a physical resource block.

[0063] In some embodiments, the set of resource elements used for transmitting reference signals on a physical resource block can also be called a reference signal pattern. The reference signal pattern is generally designed based on a physical resource block, with different physical resource blocks repeating the same reference signal pattern. In some instances, the reference signal pattern can also be designed based on a group of physical resource blocks, with different physical resource block groups including the same reference signal pattern. In some embodiments, reference signal patterns at different layers occupy the same time-frequency resources, but they are distinguished by different code domain resources. In some embodiments, reference signal patterns at different layers occupy different time-frequency resources.

[0064] In some embodiments, the information processing method can be a traditional information processing method or various advanced information processing methods, including but not limited to information processing methods based on artificial intelligence (AI).

[0065] In some embodiments, artificial intelligence (AI) includes devices, components, software, modules, models, functional modules, and functional functions that possess self-learning capabilities, such as machine learning (ML), deep learning, reinforcement learning, transfer learning, deep reinforcement learning, and meta-learning. In some embodiments, artificial intelligence is implemented through artificial intelligence networks (or neural networks).

[0066] In some embodiments, the antenna is a physical antenna. In some examples, the antenna is a logical antenna. In some examples, the concepts of port and antenna, antenna port, reference signal port, and pilot port are interchangeable. In some examples, the antenna is a transmitting antenna. In some examples, the antenna is a receiving antenna. In some examples, the antenna includes an antenna pair consisting of a transmitting antenna and a receiving antenna. In some examples, the antenna can be a uniform linear array. In some examples, the antenna is a uniform planar array, such as an array element / antenna comprising Ng rows and Mg columns, where Ng and Mg are positive integers.

[0067] In some examples, the reference signal is a DMRS. In other examples, the reference signal can be other types of reference signals, such as channel state information reference signal (CSI-RS), sounding reference signal (SRS), phase noise tracking reference signal (PTRS), positioning reference signal (PRS), etc., which are not limited in this disclosure.

[0068] In some embodiments, the sequence type of the reference signal includes, but is not limited to: m-sequence, gold sequence, chirp sequence, ZC sequence, pseudo-random sequence, sequence generated by nonlinear methods such as artificial intelligence, and sequence obtained by computer search.

[0069] In some embodiments, the modulation method includes, but is not limited to, one of the following: modulation order, modulation and coding scheme (MCS), modulation scheme (such as quadrature amplitude modulation (QAM), 16QAM, 64QAM, 256QAM, quadrature phase shift keying (QPSK), etc., including but not limited to various amplitude modulation schemes, phase modulation schemes, amplitude and phase modulation schemes), and can also be other irregular modulation schemes, such as modulation schemes generated based on artificial intelligence, etc., which are not limited here. "The first modulation scheme is greater than the second modulation scheme" means that the modulation order of the first modulation scheme is greater than the modulation order of the second modulation scheme, or that the number of constellation points in the constellation diagram of the first modulation scheme is greater than the number of constellation points in the constellation diagram of the second modulation scheme, or that the first modulation coding scheme is greater than the second modulation coding scheme.

[0070] It should be understood that Figure 1 is an exemplary structural diagram, and the number of devices included in the communication system shown in Figure 1 is not limited, for example, the number of first nodes and second nodes is not limited. Furthermore, in addition to the devices shown in Figure 1, the communication system shown in Figure 1 may also include other devices, and this is not limited.

[0071] In some examples, a wireless communication system includes one or more first nodes (e.g., base stations) and one or more second nodes (e.g., terminals). Each first node includes multiple antennas, and each second node may include one or more antennas. The first node transmits a reference signal, and the second node receives the reference signal and measures the reference signal to obtain channel information H. The channel information H can be one of the following: time-domain channel information or frequency-domain channel information.

[0072] In some embodiments, the transmission resources include, but are not limited to, at least one or more resources selected from time-domain resources, frequency-domain resources, and code-domain resources. In one example, the transmission resources may be used to transmit data. In one example, the transmission resources are used to transmit a reference signal. In one instance, the transmission resources are used to multiplex the transmission of the reference signal and data. Multiplexing here includes at least one of spatial multiplexing, time-domain multiplexing, frequency-domain multiplexing, and code-domain multiplexing. In one example, the transmission resources include one or more resource elements (REs), each resource element capable of transmitting a modulation symbol, including a time-frequency resource comprising a subcarrier and a symbol. In one example, the transmission resources include one or more physical resource blocks.

[0073] In some embodiments, the transmission resource description information includes, but is not limited to, information used to describe at least one of the following resources or a combination of resources occupied by the transmission resource: time-domain resources, frequency-domain resources, and code-domain resources. In some embodiments, the transmission resource description information includes, but is not limited to, at least one of the following: time-domain description information corresponding to the transmission resource, frequency-domain description information corresponding to the transmission resource, spatial-domain description information corresponding to the transmission resource, and code-domain description information corresponding to the transmission resource.

[0074] In one example, the time-domain description information corresponding to the transmission resource includes, but is not limited to, at least one of the following description parameters corresponding to the transmission resource: number of time-domain symbols, start index of time-domain symbols, end index of time-domain symbols, and start and length indicator value (SLIV) of time-domain symbols. Here, time-domain symbols can also be referred to as symbols.

[0075] In one example, the frequency domain description information corresponding to the transmission resource includes, but is not limited to, at least one of the following description parameters corresponding to the transmission resource: number of subcarriers, subcarrier start index, subcarrier cutoff index, and subcarrier start and length indicator value (SLIV). In other examples, the subcarrier here can be replaced by one of the following: physical resource block, physical resource block group, subband, or bandwidth part (BWP).

[0076] In one example, the spatial description information corresponding to the transmission resource includes, but is not limited to, at least one of the following description parameters corresponding to the transmission resource: reference signal port index, reference signal port group index, reference signal port type, and reference signal sequence. In other examples, the reference signal port here can be replaced by one of the following: port, DMRS port, CSI-RS port, transmit antenna, receive antenna, transmit beam, receive beam, and transmission layer.

[0077] In one example, the spatial description information corresponding to the transmission resource includes, but is not limited to, at least one of the following description parameters corresponding to the transmission resource: orthogonal cover codes (OCC), code division multiplexing (CDM), OCC length, OCC sequence, and OCC index / indicator.

[0078] In one example, the code field description information corresponding to the transmission resource includes, but is not limited to, at least one of the following description parameters corresponding to the transmission resource: orthogonal cover codes (OCC), CDM, OCC length, OCC sequence, and OCC index / indicator.

[0079] In one example, at least one of the following can be indicated by one or more higher-layer and / or physical-layer signaling: time-domain description information corresponding to the transmission resource, frequency-domain description information corresponding to the transmission resource, spatial-domain description information corresponding to the transmission resource, and code-domain description information corresponding to the transmission resource.

[0080] In some examples, a resource unit can be one of the following: a symbol, a subcarrier, or a RE. If a resource unit is a symbol, it includes all REs corresponding to different subcarriers on that symbol. If a resource unit is a subcarrier, it includes all REs corresponding to different symbols on that subcarrier. Generally, a resource unit here can refer to a resource unit on a physical resource block, a symbol is an RE on different subcarriers of the same symbol on a physical resource block, and a subcarrier is all REs corresponding to different symbols on that subcarrier on a physical resource block. In some instances, the number of resource units being L means that a physical resource block includes L resource units; this will not be elaborated further in other examples or embodiments.

[0081] In some examples, the time-frequency resources for transmitting the reference signal also transmit the data; that is, the data and the reference signal are transmitted in a mixed manner on the same time-frequency resources.

[0082] In some examples, the transmission resource is at least one of a time-domain resource and a frequency-domain resource for transmitting reference signals and / or data. For example, a time-frequency resource for transmitting reference signals and / or data includes a set of one or more REs. The transmission resource is a time-frequency resource allocated by a first communication node to a second communication node for transmitting data and / or signals related to the second communication node; it may include one or more resource units. The first node instructs the second communication node on the transmission resource description information via higher-layer signaling and / or physical-layer signaling. In some embodiments, the transmission resource includes one or more physical resource blocks, each physical resource block having a time-frequency resource region consisting of L1 symbols and L2 subcarriers. L1 and L2 are positive integers, for example, L1 is a positive integer less than or equal to 14, and L2 is 12. Further descriptions of the transmission resource will not be repeated in other examples or embodiments.

[0083] In one example, in the downlink, a first communication node transmits reference signals and / or data to a second communication node on the transmission resource. The second communication node receives the reference signals and / or data transmitted by the first communication node on the transmission resource. In one example, in the uplink, the second communication node transmits reference signals and / or data to the first communication node on the transmission resource. The first communication node receives the reference signals and / or data transmitted by the second communication node on the transmission resource. That is, transmission includes both sending and receiving, and will not be elaborated further in other examples or embodiments.

[0084] In some examples, transmission layers can also be called layers. This refers to the ability of a communication node to transmit data or reference signals simultaneously and multiple times over the same time-frequency resources due to multiple ports or antennas. Each data stream is considered a "layer". The maximum number of layers can be determined based on the channel state, i.e., the channel rank, where the channel rank R can be a positive integer. Further details will not be provided in other examples or embodiments.

[0085] This disclosure provides a communication method. As shown in FIG2, applied to a first node, the method includes S101-S102.

[0086] S101. Determine a reference signal pattern based on channel state information. The reference signal pattern includes frequency domain description information and / or time domain description information for transmitting reference signals at at least one layer.

[0087] In this disclosure, data at at least one layer can also be understood as data at at least one port, that is, data is transmitted on the transmission resources corresponding to a layer or port. Reference signals at at least one layer can also be understood as reference signals at at least one port, that is, reference signals are transmitted on the transmission resources corresponding to a layer or port, i.e., the reference signal on the i-th layer corresponds to the reference signal on the i-th port, i = 1, ..., R, which will not be elaborated further.

[0088] In some embodiments, the channel state information includes at least one of the following: modulation order, modulation coding scheme, modulation scheme indication, channel rank, number of reference signal ports, and total number of transmission layers. This allows for the determination of reference signal patterns based on multiple types of channel state information, facilitating flexible configuration and transmission of reference signals and / or data at at least one layer in more scenarios.

[0089] Modulation methods may include: modulation order, MCS, modulation scheme (e.g., constellation diagrams related to different orders of QAM, PSK, and AI), and modulation scheme indication. The modulation scheme indication can also be called a modulation scheme index; for example, different modulation schemes are arranged, with each scheme corresponding to a modulation scheme index. The channel state information set can also be called a channel state information group, and each channel state information set includes at least one channel state information. Multiple possible channel state information is divided into multiple sets, each set including one or more channel state information items. Further details will not be elaborated in other examples or embodiments.

[0090] In some embodiments, determining a reference signal pattern based on channel state information includes: if the channel state information belongs to a first channel state information or a first set of channel state information, determining the reference signal pattern as a first reference signal pattern; or, if the channel state information belongs to a second channel state information or a second set of channel state information, determining the reference signal pattern as a second reference signal pattern; wherein the first channel state information and the second channel state information are two different channel state information, the first set of channel state information and the second set of channel state information are two different sets of channel state information, and the first reference signal pattern and the second reference signal pattern are two different reference signal patterns among N reference signal patterns, where N is an integer greater than 1. It is understood that the channel state information here can include more channel state information than the two types described above, and the set of channel state information can also include more sets of channel state information than the two types described above; correspondingly, the reference signal pattern can include more reference signal patterns than the two types described above. This disclosure does not limit this, and will not be elaborated further in other examples or embodiments.

[0091] For example, the channel state information includes the modulation scheme. If the modulation scheme is a first modulation scheme (or belongs to a set of first modulation schemes), the reference signal pattern is determined to be a first reference signal pattern; if the modulation scheme is a second modulation scheme (or belongs to a set of second modulation schemes), the reference signal pattern is determined to be a second reference signal pattern.

[0092] In one example, when the modulation scheme is QAM or BPSK, reference signals from different ports can be transmitted on the same time-frequency resources, or the reference signal patterns from different ports can use the same time-frequency resources, such as all time-frequency resources. In another example, when the modulation scheme is 64QAM or 256QAM, reference signals from different ports are transmitted on different time-frequency resources, or the reference signal patterns from different ports can use different time-frequency resources. This reduces interference between different reference signals because higher-order modulation schemes are more sensitive to interference; the same level of interference may cause a higher-order modulation scheme to fail to demodulate properly, while a lower-order modulation scheme can demodulate normally. In another example, when the modulation scheme is 64QAM or 256QAM, the reference signal of port group 1 is transmitted on the same first transmission resource, and the reference signal of port group 2 is transmitted on the same second transmission resource. Here, the first transmission resource is different from the second transmission resource; their corresponding resource units do not overlap, such as on different symbols, on different subcarrier sets, or on different REs. In one example, port group 1 consists of {port 1 and port 2}, and in another example, port group 2 consists of {port 3 and port 4}. Of course, in other examples, there are other different grouping methods for ports, and the number of port groups is a positive integer greater than 1. These will not be listed here.

[0093] In some examples, modulation schemes are grouped into at least two groups. In some embodiments, the modulation schemes are divided into two groups: the first group includes {1,2} and the second group includes {3,4}. In some embodiments, the modulation schemes are divided into two groups: the first group includes {1} and the second group includes {2}. In some embodiments, the modulation schemes are divided into two groups: the first group includes {1,2} and the second group includes {3}. In some embodiments, the modulation schemes are divided into two groups: the first group includes {1,2,3,4} and the second group includes {5,6,7,8}. In some embodiments, the modulation schemes are divided into three groups: the first group includes {1}, the second group includes {2}, and the third group includes {3}. In some embodiments, the modulation schemes are divided into three groups: the first group includes {1,2}, the second group includes {3}, and the third group includes {4}. In some embodiments, the modulation schemes are divided into three groups: the first group includes {1,2}, the second group includes {3,4}, and the third group includes at least one modulation scheme index from modulation schemes 5, 6, 7, and 8. In some embodiments, the modulation schemes are divided into four groups: the first group includes {1}, the second group includes {2}, the third group includes {3}, and the fourth group includes {4}. In some embodiments, the modulation schemes are divided into four groups: the first group includes {1,2}, the second group includes {3,4}, the third group includes {5,6}, and the fourth group includes {7,8}. In other examples, the modulation schemes may also have other grouping methods, which will not be listed here. In other examples, the modulation schemes may also be divided into more than four groups, which will not be listed here. In these examples, the numbers inside the curly braces {} are modulation scheme indices or modulation scheme indicators. In these examples, or other examples, the range of modulation scheme indices can be positive integers greater than 1, with the maximum value determined according to the transmission conditions or scenario of the communication system. These examples of modulation scheme grouping will not be elaborated upon further. In other examples, the modulation scheme can also be replaced with the modulation order, and the number inside the curly braces {} is the modulation order number. In other examples, the modulation scheme can also be replaced with the modulation coding scheme, and the number inside the curly braces {} is the modulation coding scheme index.In other examples, the modulation method here can also be replaced with a modulation scheme. The number inside the curly braces {} is the corresponding number of the modulation scheme, or it can be the type name of the modulation scheme, such as QAM, 16QAM, 64QAM, 256QAM, etc. For example, the first modulation scheme group is {QAM, 16QAM}, the second modulation scheme group is {64QAM, 256QAM}, etc. Of course, the modulation scheme can be phase modulation, amplitude modulation, or a combination of phase and amplitude modulation schemes, or various regular and irregular modulation schemes generated by artificial intelligence, etc. There are no restrictions here, and they will not be described in detail in other examples or embodiments.

[0094] In some examples, the modulation scheme is divided into at least two modulation scheme groups. When the modulation scheme currently used by the communication node belongs to different modulation scheme groups, the content transmitted on the transmission resource may differ. In one example, when the modulation scheme currently used by the communication node belongs to the first modulation scheme group, each layer on the transmission resource transmits the reference signal and data of that layer. In another example, when the modulation scheme currently used by the communication node belongs to the second modulation scheme group, some layers on the transmission resource transmit the reference signal and data of that layer, some layers transmit only the data of that layer, and some layers transmit only the reference signal of that layer. Further details will not be elaborated upon hereafter.

[0095] In some examples, the modulation scheme is divided into at least two modulation scheme groups. When the modulation scheme currently used by the communication node belongs to a different modulation scheme group, it corresponds to a different reference signal pattern. In one example, when the modulation scheme currently used by the communication node belongs to the first modulation scheme group, the reference signal is mapped to the reference signal resource using the method corresponding to reference signal pattern 1 for transmission. In another example, when the modulation scheme currently used by the communication node belongs to the second modulation scheme group, the reference signal is mapped to the reference signal resource using the method corresponding to reference signal pattern 2 for transmission. In yet another example, when the modulation scheme currently used by the communication node belongs to the third modulation scheme group, the reference signal is mapped to the reference signal resource using the method corresponding to reference signal pattern 3 for transmission. In these examples, the type of reference signal pattern is a positive integer greater than 1, and the number of modulation coding scheme groups is also an integer greater than 1. The first and second are used only to distinguish different modulation coding scheme groups, not for sorting. For example, reference signal pattern 1 and reference signal pattern 2 are only used to distinguish different reference signal patterns, not to specifically refer to any particular reference signal pattern. Further details will not be provided in other examples or embodiments.

[0096] For example, the channel state information includes the channel rank. If the channel rank belongs to a first set of channel ranks, the reference signal pattern is determined to be a first reference signal pattern; if the channel rank belongs to a second set of channel ranks, the reference signal pattern is determined to be a second reference signal pattern.

[0097] In some examples, the channel rank is divided into at least two channel rank groups. Different reference signal patterns correspond to different channel rank groups when the channel rank currently used by the communication node belongs to different channel rank groups. In one example, when the channel rank currently used by the communication node belongs to the first channel rank group, the reference signal is mapped to the reference signal resource for transmission using the method corresponding to reference signal pattern 1. In another example, when the channel rank currently used by the communication node belongs to the second channel rank group, the reference signal is mapped to the reference signal resource for transmission using the method corresponding to reference signal pattern 2. In yet another example, when the channel rank currently used by the communication node belongs to the third channel rank group, the reference signal is mapped to the reference signal resource for transmission using the method corresponding to reference signal pattern 3. Further details are omitted in other examples or embodiments.

[0098] In some embodiments, determining a reference signal pattern based on channel state information includes: if the channel state information is less than or equal to a first preset threshold, determining the reference signal pattern as a first reference signal pattern; or, if the channel state information is greater than the first preset threshold, determining the reference signal pattern as a second reference signal pattern; wherein the first reference signal pattern and the second reference signal pattern are two different reference signal patterns among N reference signal patterns, and N is an integer greater than 1.

[0099] For example, the channel state information includes the modulation scheme. If the modulation scheme is less than or equal to a threshold value, the reference signal pattern is determined to be a first reference signal pattern; if the modulation scheme is greater than the threshold value, the reference signal pattern is determined to be a second reference signal pattern.

[0100] For example, the channel state information includes the channel rank. If the channel rank is less than or equal to a threshold value, the reference signal pattern is determined to be a first reference signal pattern; if the channel rank is greater than the threshold value, the reference signal pattern is determined to be a second reference signal pattern.

[0101] In one example, when the channel rank is less than or equal to R1, reference signals from different ports can be transmitted on the same time-frequency resource, or the reference signal patterns from different ports can use the same time-frequency resource, such as all REs of the transmission resource. In another example, when the channel rank is greater than R1, reference signals from different ports are transmitted on different time-frequency resources, or the reference signal patterns from different ports can use different time-frequency resources. In one example, when the channel rank is greater than R1, the reference signals of port group 1 are transmitted on the same first transmission resource, and the reference signals of port group 2 are transmitted on the same second transmission resource. Here, R1 is a positive integer greater than 1, the first transmission resource is different from the second transmission resource, and their corresponding resource units have no overlap, such as on different symbols, on different subcarrier sets, or on different REs. In one example, port group 1 is {port 1 and port 2}, and in another example, port group 2 is {port 3 and port 4}. Of course, in other examples, there are other different grouping methods for port groups, and the number of port groups is a positive integer greater than 1. These will not be listed here.

[0102] In some embodiments, determining a reference signal pattern based on channel state information includes: generating physical layer signaling; and determining a reference signal pattern based on channel state information and physical layer signaling.

[0103] In some embodiments, determining a reference signal pattern based on channel state information and physical layer signaling includes one of the following: if the physical layer signaling takes a first value, the channel state information belongs to a first channel state information, or the channel state information belongs to a first set of channel state information, or the channel state information is less than or equal to a first preset threshold, the reference signal pattern is determined to be a first reference signal pattern; if the physical layer signaling takes a first value, the channel state information belongs to a second channel state information, or the channel state information belongs to a second set of channel state information, or the channel state information is greater than the first preset threshold, the reference signal pattern is determined to be a second reference signal pattern; if the physical layer signaling takes a second value, the channel state information belongs to the first channel state information, or the channel state information belongs to a first set of channel state information, or the channel state information is less than or equal to the first preset threshold, the reference signal pattern is determined to be a third reference signal pattern; if the physical layer signaling takes a second value, the channel state information belongs to the second channel state information, or the channel state information belongs to a second set of channel state information, or the channel state information is greater than the first preset threshold, the reference signal pattern is determined to be a fourth reference signal pattern.

[0104] The first reference signal pattern, the second reference signal pattern, the third reference signal pattern, and the fourth reference signal pattern are each one of N reference signal patterns, wherein at least the first and second reference signal patterns are different, and the third and fourth reference signal patterns are different. In other examples, when the physical layer signaling takes the second value, the reference signal pattern is determined to be the third reference signal pattern. That is, when the physical layer signaling takes the second value, the reference signal pattern is determined only based on the physical layer signaling.

[0105] In these embodiments, the first or second value of the physical layer signaling or higher layer signaling is two different values, which can be integers, 0 or positive integers, Boolean values, strings, or characters.

[0106] It is understood that the physical layer signaling values ​​here may have other values ​​besides the first and second values ​​described above, and this disclosure does not impose any restrictions on this.

[0107] For example, the channel state information includes the modulation scheme. The physical layer signaling takes a first value, the modulation scheme is a first modulation scheme, and the reference signal pattern is determined to be a first reference signal pattern; the modulation scheme is a second modulation scheme, and the reference signal pattern is determined to be a second reference signal pattern.

[0108] The physical layer signaling takes the second value, the modulation method is the first modulation method, and the reference signal pattern is determined to be the third reference signal pattern; the modulation method is the second modulation method, and the reference signal pattern is determined to be the fourth reference signal pattern.

[0109] In some examples, modulation schemes are divided into at least two modulation scheme groups. When the modulation scheme currently used by a communication node belongs to different modulation scheme groups, the same physical layer signaling may correspond to different reference signal patterns. Although the physical layer signaling value used to indicate the reference signal pattern is always the first value, the reference signal pattern indicated by the physical layer signaling can be different for different modulation schemes or modulation scheme groups. For example, in one example, when the modulation scheme currently used by the communication node belongs to the first modulation scheme group, the reference signal is mapped to the reference signal resource using the method corresponding to reference signal pattern 1 for transmission. In another example, when the modulation scheme currently used by the communication node belongs to the second modulation scheme group, the reference signal is mapped to the reference signal resource using the method corresponding to reference signal pattern 2 for transmission. In yet another example, when the modulation scheme currently used by the communication node belongs to the third modulation scheme group, the reference signal is mapped to the reference signal resource using the method corresponding to reference signal pattern 3 for transmission. In these examples, the type of reference signal pattern is a positive integer greater than 1, and the number of modulation scheme groups is also an integer greater than 1.

[0110] For example, the channel state information includes the channel rank. If the physical layer signaling takes a first value, the channel rank belongs to a first channel rank set, and the reference signal pattern is determined to be a first reference signal pattern; if the physical layer signaling takes a first value, the channel rank belongs to a second channel rank set, and the reference signal pattern is determined to be a second reference signal pattern.

[0111] If the physical layer signaling takes the second value, the channel rank belongs to the first channel rank set, and the reference signal pattern is determined to be the third reference signal pattern; if the physical layer signaling takes the second value, the channel rank belongs to the second channel rank set, and the reference signal pattern is determined to be the fourth reference signal pattern.

[0112] In some examples, the channel rank is divided into at least two channel rank groups. When the channel rank currently used by the communication node belongs to different channel rank groups, the same signaling indicating a reference signal pattern may correspond to different reference signal patterns. Although the physical layer signaling value is always the first value, the reference signal pattern indicated by the signaling can be different in different channel ranks or channel rank groups. For example, in one example, when the channel rank currently used by the communication node belongs to the first channel rank group, the reference signal is mapped to the reference signal resource for transmission using the method corresponding to reference signal pattern 1. In another example, when the channel rank currently used by the communication node belongs to the second channel rank group, the reference signal is mapped to the reference signal resource for transmission using the method corresponding to reference signal pattern 2. In yet another example, when the channel rank currently used by the communication node belongs to the third channel rank group, the reference signal is mapped to the reference signal resource for transmission using the method corresponding to reference signal pattern 3. In these examples, the type of reference signal pattern is a positive integer greater than 1, and the number of channel rank groups is also an integer greater than 1.

[0113] In some embodiments, the reference signal pattern includes at least a first reference signal pattern and a second reference signal pattern, wherein one of the following conditions exists:

[0114] In the first reference signal pattern, the reference signal on each layer occupies all the resource units of the transmission resource, while in the second reference signal pattern, the reference signal on each layer occupies a portion of the resource units; or, in the first reference signal pattern, the reference signal on each layer occupies L0 resource units of the transmission resource, while in the second reference signal pattern, the reference signal on each layer occupies L0+1 resource units, where L0 is floor(L / R), floor() represents the round-down operation, L is the number of resource units of the transmission resource, and R is the channel rank or the total number of transmission layers; or, in the first reference signal pattern, the number of resource units occupied on odd-numbered physical resource blocks of the transmission resource is greater than the number of resource units occupied on even-numbered physical resource blocks, while in the second reference signal pattern, the number of resource units occupied on odd-numbered physical resource blocks of the transmission resource is less than the number of resource units occupied on even-numbered physical resource blocks.

[0115] In some examples, the reference signal ports can be divided into R groups, each group including one or more reference signal ports. Multiple reference signal ports within each group occupy the same RE (Reference Context), but they occupy different layers and are distinguished using different spatial division or code division techniques. The design of the REs occupied between different reference signal port groups is similar to the design of a single reference signal port described above. For example, the i-th reference signal port or the reference signal on the i-th layer can be replaced by the i-th reference signal port group, where i = 1, ..., R. Further details will not be elaborated here.

[0116] In some embodiments, the reference signal resources on each layer of the reference signal pattern are L0 resource units with consecutive resource indices.

[0117] For example, each reference signal port corresponds to at least L0 resource units, wherein the i-th reference signal port (or the reference signal on the i-th layer) corresponds to the (i-1)*L0+1 to (i-1)*L0+L0 resource units, i = 1, ..., R.

[0118] In some embodiments, the reference signal resources on each layer of the reference signal pattern are L0 resource units with resource unit indices separated by T, where T is an integer greater than 1.

[0119] For example, each reference signal port corresponds to at least L0 resource units, wherein the i-th reference signal port (or the reference signal on the i-th layer) corresponds to the (j-1)*L0+i-th resource unit, j=1,…,L0, i=1,…,R.

[0120] In some embodiments, the resource units occupied by the reference signal on each layer of the reference signal pattern are determined according to the time domain priority principle; or, the resource units occupied by the reference signal on each layer of the reference signal pattern are determined according to the frequency domain priority principle.

[0121] In one example, within a PRB, the RE index can be frequency-domain prioritized, meaning REs on different subcarriers of the first symbol are indexed first, then REs on different subcarriers of the second symbol, and so on, until all symbols are indexed, as shown in Figure 3(a). In another example, within a PRB, the RE index can be time-domain prioritized, meaning REs on different symbols of the first subcarrier are indexed first, then REs on different symbols of the second subcarrier, and so on, until all subcarriers are indexed, as shown in Figure 3(b). The sorting of RE indices will not be discussed further here.

[0122] In one example, assume that the reference signal resources on each layer consist of L0 REs, and the reference signal resources on each layer can occupy L0 REs in a PRB in the order of their indexes.

[0123] S102. Transmit at least one layer of reference signal and at least one layer of data on the transmission resources indicated by the reference signal pattern.

[0124] In some embodiments, the reference signal on at least one layer includes reference signals on R layers, and the transmission resources include a first transmission resource and a second transmission resource; wherein, the first transmission resource includes L0*R resource units corresponding to the reference signals on R layers, and the second transmission resource includes resource units on the transmission resources other than the first transmission resource, L0 is floor(L / R), floor() represents the round-down operation, L is the number of resource units of the transmission resource, and R is the channel rank or the total number of transmission layers.

[0125] In some embodiments, the second transmission resource is used to transmit data, wherein one of the following conditions exists: the total data transmission power on the first transmission resource is different from the total data transmission power on the second transmission resource; the data transmission power of different layers on the first transmission resource is different; the data transmission power of different layers on the second transmission resource is different; the ratio of the total data transmission power on the first transmission resource to the power of the reference signal is different from the ratio of the total data transmission power on the second transmission resource to the power of the reference signal.

[0126] In one example, the transmission resources comprise L resource units, where each resource unit can be one of a symbol, subcarrier, RE, etc. If L is not divisible by R, then the transmission resources for each reference signal occupy L0 = floor(L / R) resource units, and R reference signals occupy R*L0 resource units, referred to as the first transmission resource. The first transmission resource is used at least for transmitting reference signals, and can also transmit a mixed signal of reference signals and data at at least one layer. The resource units other than the first transmission resource are referred to as the second transmission resource, comprising the remaining LR*L0 resource units. The second transmission resource can be used only for transmitting data, in which case the total transmission power of the data on the first transmission resource is different from the total transmission power of the data on the second transmission resource. Alternatively, the ratio of the total transmission power of the data on the first transmission resource to the power of the reference signal is different from the ratio of the total transmission power of the data on the first transmission resource to the power of the reference signal. In other examples, the total transmission power of the data on the first transmission resource is the same as the total transmission power of the data on the second transmission resource. Alternatively, the ratio of the total transmission power of the data on the first transmission resource to the power of the reference signal is the same as the ratio of the total transmission power of the data on the first transmission resource to the power of the reference signal.

[0127] In some embodiments, the second transport resource is used to transmit reference signals on selected L1 layers, wherein the selected L1 layers of reference signals include one of the following: the reference signal on the L1 layer with the smallest layer index (or reference signal port index); the reference signal on the L1 layer with the largest layer index (or reference signal port index); the reference signal on the default or agreed L1 layers; or the reference signal on the L1 layers indicated by higher layer and / or physical layer signaling; wherein L1 is the number of resource units included in the second transport resource.

[0128] In one example, when the second transmission resource is used to transmit reference signals, the reference signals on each layer are multiplexed to transmit the data on that layer, and the reference signals of different layers occupy different resource units. In one example, among the reference signals on the L1 selected layers, the reference signal of the i-th selected layer is transmitted on the i-th resource unit, while the other layers on the i-th resource unit only transmit the data corresponding to that layer, i = 1, ..., L1.

[0129] In some embodiments, the transmission resources include at least a first resource block (PRB) and a second resource block, wherein the reference signal pattern on the first resource block is different from the reference signal pattern on the second resource block. Here, the first resource block and the second resource block can be two different resource blocks from C resource blocks, each resource block can be a physical resource block or a group of physical resource blocks, wherein a group of physical resource blocks includes one or more physical resource blocks, and C is a positive integer greater than 1.

[0130] In some embodiments, transmitting a reference signal and at least one layer of data on a transmission resource indicated by a reference signal pattern includes one of the following: transmitting a reference signal on one layer and data on R-1 layers in R transmission layers of the transmission resource; transmitting a reference signal and data on the first r transmission layers of the transmission resource and transmitting data on the last Rr transmission layers of the transmission resource; transmitting data corresponding to the target transmission layer on the target transmission layer of the transmission resource; transmitting a reference signal and data corresponding to the target transmission layer on the target transmission layer of the transmission resource and transmitting data corresponding to other transmission layers on other transmission layers besides the target transmission layer; wherein R is the value of the channel rank or the total number of transmission layers, and r is less than R.

[0131] In some embodiments, signaling is transmitted, which is higher-layer and / or physical-layer signaling carrying a reference signal pattern.

[0132] The solutions involved in this disclosure are described below with examples.

[0133] In one example, at least one reference signal on a port and at least one layer of data are transmitted on the transport resource. In some embodiments, the reference signal on the at least one layer includes at least one of the following: reference signal P1, ..., reference signal P K Reference signal P i Let be the reference signal on the i-th layer, where i = 1, ..., K, and K is a positive integer. In some embodiments, the data on at least one layer includes at least one of the following: data D1, ..., data D K Data D i K represents the data transmitted on the i-th layer, where K is an integer greater than 1.

[0134] In one example, transmitting reference signals and data on a transport resource includes transmitting reference signals P1, ..., reference signals P1 on a portion or all of the REs of the first transport resource. K At least one of them, and the transmitted data D1, ..., data D K At least one of them, where K is an integer greater than 1. Here, the reference signal P i For the reference signal on the i-th reference signal port, the data D i This represents the data transmitted on the i-th layer. i = 1, ..., K, where K is a positive integer.

[0135] In some examples, the reference signal on the i-th reference signal port can also be called the reference signal transmitted on the i-th layer or the reference signal on the i-th layer, denoted as reference signal P. i Or P i The data transmitted on the i-th layer can also be called the data corresponding to the i-th layer, denoted as data D. i Or D i The reference signal P transmitted on the i-th layer i and data D i It can also be called the reference signal P transmitted on the i-th layer. i and data D i The mixed signal. i = 1, ..., K, where K is a positive integer. Further details will not be provided in other examples or embodiments.

[0136] In some examples, the first node uses a multi-antenna system and multiplexes multiple layers, meaning multiple data or reference signals can be transmitted simultaneously. In this case, advanced signal processing methods can be used for channel estimation, such as nonlinear signal processing methods represented by artificial intelligence. Therefore, one or more reference signals and / or data from one or more layers can be transmitted simultaneously and multiplexed on all or part of the transmission resources (REs).

[0137] In some examples, for the i-th transport layer, one of the following can be transmitted: transmit the reference signal P.i Data transmission D i Transmission reference signal P i and data D i Here, i = 1, ..., K, where K is the maximum number of layers that the transmission node can currently transmit. Furthermore, across all layers, at least one port's reference signal and one layer's data are transmitted.

[0138] In some diagrams, P i / D i This indicates that the reference signal P from layer i has been transmitted on the corresponding RE. i and / or data D i In some diagrams, P i +D i This indicates that the reference signal P from the i-th layer has been transmitted on the corresponding RE. i and data D i The mixed signal. In some illustrations, P i This indicates that the reference signal P from the i-th layer has been transmitted on the corresponding RE. i In some diagrams, D i This indicates that the corresponding RE has transmitted data D from the i-th layer. i Here, i is a positive integer greater than 1, less than or equal to the maximum number of layers that the wireless communication system can transmit, i.e., the channel rank R. In these examples, different REs may all be labeled Pi and / or Di, which only indicates that they transmit reference signals and data on the i-th transmission layer, and does not mean that different REs transmit the same reference signals and data. The reference signals and / or data on each RE, even on the same layer, can have different values. Further details will not be provided in other examples or embodiments.

[0139] In some examples, the transmission content of any two layers can have multiple different possible combinations. As shown in Figure 4, taking the i-th and j-th layers as examples, combinations of reference signals and / or data from any two layers are given, where i and j are different positive integers. It should be noted that the transmission combinations can be extended to any number of layers, such as three or four. In some embodiments, the i-th layer transmits the reference signal P corresponding to the i-th layer on all or part of the specified transmission resources RE. i and / or data D i In some embodiments, the reference signal P corresponding to layer j is transmitted on layer j of all or part of the specified transport resources RE. j and / or data D j In one example, no reference signal and data are transmitted on layer i of all or part of the specified transport resources (REs), but the reference signal P corresponding to layer j is transmitted on layer j. j and / or data D jIn one example, no reference signal and data are transmitted on layer j of all or part of the specified transport resource (RE), but the reference signal P corresponding to layer i is transmitted on layer i. i and / or data D i In some examples, the communication nodes determine the content transmitted at each layer, such as data and / or reference signals, using default methods. In other examples, the communication nodes indicate the content transmitted at each layer, such as data and / or reference signals, through signaling. Further details will not be provided in other examples or embodiments.

[0140] In one example, the communication node includes a first transport layer and a second transport layer. The first transport layer transmits a reference signal, and the second transport layer transmits data. The first and second transport layers correspond to different transport layers, and the layer indicator takes a value between 1 and R, where R is the channel rank or the total number of transport layers. That is, on the same time-frequency resources, different layers either transmit reference signals or data.

[0141] In one example, the communication node has only one transport layer, which transmits data and reference signals on a specified transport resource. In another example, the communication node has two transport layers; on a specified transport resource, the first transport layer transmits data and reference signals, and the second transport layer transmits data and / or reference signals. In another example, the communication node has three transport layers; on a specified transport resource, the first transport layer transmits data and reference signals, the second transport layer transmits data and / or reference signals, and the third transport layer transmits only data or reference signals. In yet another example, the communication node has four transport layers; on a specified transport resource, the first transport layer transmits data and reference signals, the second transport layer transmits data and / or reference signals, the third transport layer transmits data and / or reference signals, and the fourth transport layer transmits either data or reference signals. Here, the specified transport resource can be the transport resource corresponding to the reference signal pattern.

[0142] In some examples, the transport layer is grouped into at least two groups. In some embodiments, the transport layer is divided into two groups, with the first group comprising {1,2} and the second group comprising {3,4}. In some embodiments, the transport layer is divided into two groups, with the first group comprising {1} and the second group comprising {2}. In some embodiments, the transport layer is divided into two groups, with the first group comprising {1,2} and the second group comprising {3}. In some embodiments, the transport layer is divided into two groups, with the first group comprising {1,2,3,4} and the second group comprising {5,6,7,8}. In some embodiments, the transport layer is divided into three groups, with the first group comprising {1}, the second group comprising {2}, and the third group comprising {3}. In some embodiments, the transport layer is divided into three groups, with the first group comprising {1,2}, the second group comprising {3}, and the third group comprising {4}. In some embodiments, the transport layer is divided into three groups: the first group includes {1,2}, the second group includes {3,4}, and the third group includes at least one layer index from transport layers 5, 6, 7, and 8. In some embodiments, the transport layer is divided into four groups: the first group includes {1}, the second group includes {2}, the third group includes {3}, and the fourth group includes {4}. In some embodiments, the transport layer is divided into four groups: the first group includes {1,2}, the second group includes {3,4}, the third group includes {5,6}, and the fourth group includes {7,8}. In other examples, the transport layer may have other grouping methods, which will not be listed here. In other examples, the transport layer may be divided into more than four groups, which will not be listed here. In this example, the numbers inside the curly braces {} are transport layer indices or transport layer indicators. The range of transport layer indices can be positive integers greater than 1, with the maximum value determined according to the conditions or scenario of the communication system's transmission. These examples of transport layer packetization will not be elaborated upon further. In other examples, the transport layer can be replaced with a port, and the number inside the curly braces {} is the port index. In other examples, the transport layer can also be replaced with the channel rank, and the number inside the curly braces {} is the size of the channel rank. Further details will not be provided in other examples or embodiments.

[0143] In some examples, the transport layer is divided into at least two transport layer groups, with layers in different transport layer groups transmitting different content. For example, some transport layer groups transmit both data and reference signals, some transmit only data, and some transmit only reference signals. In some embodiments, if a transport layer belongs to a first transport layer group, it transmits both reference signals and data. In some embodiments, if a transport layer belongs to a second transport layer group, it transmits reference signals. In some embodiments, if a transport layer belongs to a second transport layer group, it transmits data. In some embodiments, if a transport layer belongs to a third transport layer group, it transmits either data or reference signals. In some embodiments, if a transport layer belongs to a fourth transport layer group, it transmits either data or reference signals. In other embodiments, the content transmitted by layers in each transport layer group can also vary, and these will not be listed here. In some examples, the communication node determines the content transmitted by layers in each layer group, such as data and / or reference signals, using a default method. In some examples, the communication nodes indicate the content transmitted by each layer group through signaling, such as data and / or reference signals, which will not be elaborated further here.

[0144] In some examples, the transmission resources corresponding to reference signals on different ports or on different layers are different. It should be noted that one or more layers of data are transmitted on the transmission resource corresponding to each reference signal. The transmission resource location (including indices of one or more symbols and / or indices of one or more subcarriers) used to indicate or identify reference signals on different layers can also be called a reference signal pattern. Each reference signal pattern includes one or more REs, or one or more symbols, or one or more subcarriers. Unless otherwise specified, the reference signal pattern refers to the set of REs on the same physical resource block. The set of REs on different physical resource blocks is the same. Of course, in some examples, different reference signal patterns may exist on different physical resource blocks. The description of the reference signal pattern will not be repeated in other examples or embodiments.

[0145] In some examples, the channel rank during the current transmission is R, where R is a positive integer. A Physical Resource Block (PRB) has S symbols used for transmitting data and reference signals, and C subcarriers, resulting in a total of L RE numbers, where L = S * C, and S, C, and R are all positive integers. In these examples, the maximum transport layer that a communication node (which can be a terminal or a base station, where a terminal can be a second communication node and a base station can be a first communication node) can transmit at is R, requiring R reference signal ports, i.e., P1, ..., P2. R The number of data streams or transmission layers transmitted is R, i.e., D1, ..., D2. R .

[0146] In some examples, at least two reference signals are multiplexed and transmitted over the same time-frequency resources (including a set of REs) through different transport layers (or ports). In these embodiments, for each RE used to transmit the reference signal, at least one layer of data is multiplexed and transmitted. That is, for any RE used to transmit the reference signal, a mixed signal of the reference signal and data is transmitted on at least one transport layer.

[0147] In some examples, the current transmission channel rank R is at least 2, meaning that at least two port reference signals and / or two transport layer data can be transmitted. Furthermore, the reference signals on different transport layers are transmitted on different resource units, i.e., either on different symbols, on different subcarriers, or on different REs.

[0148] In one example, the number of symbols S on a PRB is divisible by R, and each reference signal occupies S / R symbols, where S / R represents S divided by R. Without loss of generality, as shown in Figure 5, the transmission resources of the PRB for transmitting data and reference signals include S = 6 symbols (i.e., symbols 1, 2, 3, 4, 5, 6 from left to right in the figure), C = 6 subcarriers (i.e., subcarriers 1, 2, 3, 4, 5, 6 from top to bottom in the figure), and R = 2. Therefore, the transmission resources for reference signal P1 on the first layer include 3 symbols, and the transmission resources for reference signal P2 on the second layer also include 3 symbols. The transmission resources for the reference signals on the first layer are all REs on symbols 1, 2, and 3 (one RE in this example occupies a small square in the figure), and the transmission resources for the reference signals on the second layer are all REs on symbols 4, 5, and 6. On symbols 1, 2, and 3, P1+D1 is transmitted on the first transmission layer, and D2 is transmitted on the second layer. On symbols 4, 5, and 6, D1 is transmitted on the first transport layer, and P2+D2 is transmitted on the second layer. Of course, reference signals P1 and P2 can also have other reference signal patterns, such as reference signal P1 occupying odd-numbered symbols and reference signal P2 occupying even-numbered symbols. These will not be listed here. In other examples, the number of symbols in a physical resource block can be other numbers, the number of subcarriers can be other numbers, and the number of ports can be more than two; all can be handled similarly. Further details will not be elaborated in other examples or embodiments.

[0149] In one example, as shown in Figure 6, a PRB includes S = 7 symbols (i.e., symbols 1, 2, 3, 4, 5, 6, and 7 from left to right in the figure) and C = 6 subcarriers (i.e., subcarriers 1, 2, 3, 4, 5, and 6 from top to bottom in the figure). S is not divisible by R. The transmission resources for the reference signal P1 on the first layer are all REs on symbols 1, 2, and 3 (one RE in this example occupies a small square in the figure). The transmission resources for the reference signal P2 on the second layer are all REs on symbols 4, 5, and 6. On the 7th symbol, the reference signal P1 can be transmitted on the first layer, while data D2 can be transmitted on the second layer; or the data D1 can be transmitted on the first layer, while the reference signal P2 can be transmitted on the second layer; or the first layer is used to transmit data D1, and the second layer is used to transmit data D2. In other examples, the number of symbols in a physical resource block can be other numbers, not limited to 7, and the number of subcarriers is not limited to 6; it can be other numbers. Further details will not be provided in other examples or embodiments. In other examples, the number of symbols in a physical resource block can be other numbers, the number of subcarriers can be other numbers, and the number of ports can be more than 2; all can be handled similarly. Further details will not be provided in other examples or embodiments.

[0150] In one example, as shown in Figure 7, a PRB includes S = 7 symbols (i.e., symbols 1, 2, 3, 4, 5, 6, and 7 from left to right in the figure) and C = 6 subcarriers (i.e., subcarriers 1, 2, 3, 4, 5, and 6 from top to bottom in the figure). S is not divisible by R. The transmission resources for the reference signal P1 on the first layer are all REs on symbols 1, 3, and 5 (one RE in this example occupies a small square in the figure). The transmission resources for the reference signal P2 on the second layer are all REs on symbols 2, 4, and 6. On the 7th symbol, the reference signal P1 can be transmitted on the first layer, while data D2 can be transmitted on the second layer; or the data D1 can be transmitted on the first layer, while the reference signal P2 can be transmitted on the second layer; or the first layer is used to transmit data D1, and the second layer is used to transmit data D2. In other examples, the number of symbols in a physical resource block can be other numbers, the number of subcarriers can be other numbers, and the number of ports can be more than 2, all of which can be handled similarly. Other examples or embodiments will not be described in detail.

[0151] In one example, the number of subcarriers C on a PRB is divisible by R, and each reference signal occupies C / R subcarriers, where C / R represents C divided by R. Without loss of generality, as shown in Figure 8, the transmission resources of the PRB used for transmitting data and reference signals include S = 6 symbols (i.e., symbols 1, 2, 3, 4, 5, 6 from left to right in the figure), C = 6 subcarriers (i.e., subcarriers 1, 2, 3, 4, 5, 6 from top to bottom in the figure), and R = 2. Therefore, the transmission resources of the reference signal P1 on the first layer include 3 subcarriers, and the transmission resources of the reference signal P2 on the second layer also include 3 subcarriers. The transmission resources of the reference signal P1 on the first layer are all REs on subcarriers 1, 2, and 3 (one RE in this example occupies a small square in the figure), and the transmission resources of the reference signal P2 on the second layer are all REs on subcarriers 4, 5, and 6. On subcarriers 1, 2, and 3, P1+D1 is transmitted on the first transport layer, and D2 is transmitted on the second layer. On subcarriers 4, 5, and 6, D1 is transmitted on the first transport layer, and P2+D2 is transmitted on the second layer. Of course, reference signals P1 and P2 can also have other reference signal patterns, such as reference signal P1 occupying an odd number of subcarriers and reference signal P2 occupying an even number of subcarriers. These will not be listed here. In other examples, the number of symbols in a physical resource block can be other numbers, the number of subcarriers can be other numbers, and the number of ports can be more than two; all can be handled similarly. Further details will not be elaborated in other examples or embodiments.

[0152] In one example, as shown in Figure 9, a PRB includes S = 6 symbols (i.e., symbols 1, 2, 3, 4, 5, and 6 from left to right in the figure) and C = 5 subcarriers (i.e., subcarriers 1, 2, 3, 4, and 5 from top to bottom in the figure). C is not divisible by R. The transmission resources for the reference signal on the first layer are all REs on subcarriers 1 and 2 (one RE in this example occupies a small square in the figure), and the transmission resources for the reference signal on the second layer are all REs on subcarriers 3 and 4. On the fifth subcarrier, the reference signal P1 can be transmitted on the first layer, while data D2 can be transmitted on the second layer; or the data D1 can be transmitted on the first layer, while the reference signal P2 can be transmitted on the second layer; or the first layer is used to transmit data D1, and the second layer is used to transmit data D2. In other examples, the number of symbols in a physical resource block can be other numbers, the number of subcarriers can be other numbers, and the number of ports can be more than 2, all of which can be handled similarly. Other examples or embodiments will not be described in detail.

[0153] In one example, as shown in Figure 10, a PRB includes S = 6 symbols (i.e., symbols 1, 2, 3, 4, 5, and 6 from left to right in the figure) and C = 5 subcarriers (i.e., subcarriers 1, 2, 3, 4, and 5 from top to bottom in the figure). C is not divisible by R. The transmission resources for the reference signal on the first layer are all REs on subcarriers 1 and 3 (one RE in this example occupies a small square in the figure), and the transmission resources for the reference signal on the second layer are all REs on subcarriers 2 and 4. On the fifth subcarrier, the reference signal P1 can be transmitted on the first layer, while data D2 can be transmitted on the second layer; or the data D1 can be transmitted on the first layer, while the reference signal P2 can be transmitted on the second layer; or the first layer is used to transmit data D1, and the second layer is used to transmit data D2. In other examples, the number of symbols in a physical resource block can be other numbers, the number of subcarriers can be other numbers, and the number of ports can be more than 2, all of which can be handled similarly. Further details will not be provided in other examples or embodiments.

[0154] In one example, as shown in Figure 11, a PRB includes S = 7 symbols (i.e., symbols 1, 2, 3, 4, 5, 6, and 7 from left to right in the figure) and 6 subcarriers, so Figure 11 includes 2 PRBs. S is not divisible by R. The transmission resources for the reference signal on the first layer of a PRB are all REs on symbols 1, 2, and 3 (one RE in this example occupies a small square in the figure), and the transmission resources for the reference signal on the second layer are all REs on symbols 4, 5, and 6. Alternatively, the transmission resources for the reference signal on the first layer are all REs on symbols 1, 3, and 5, and the transmission resources for the reference signal on the second layer are all REs on symbols 2, 4, and 6; no further diagram is provided here. However, the 7th symbol will transmit either reference signal P1 or reference signal P2, resulting in different numbers of resources occupied by the reference signals on different layers. One solution is to combine multiple PRBs, such as two PRBs. For the 7th symbol, on odd-numbered PRBs (i.e., the 1st to 6th REs from top to bottom of the 7th symbol in the diagram), the first layer is used to transmit P1+D1, and the second layer is used to transmit D2. On even-numbered PRBs (i.e., the 7th to 12th REs from top to bottom of the 7th symbol in the diagram), the first layer is used to transmit D1, and the second layer is used to transmit P2+D2. In other examples, the number of symbols in a physical resource block can be other numbers, the number of subcarriers can be other numbers, and the number of ports can be more than two numbers. Furthermore, more than two PRBs can be combined for a joint design, all handled similarly. Further details in other examples or embodiments will not be elaborated upon.

[0155] In one example, a PRB consists of S = 7 symbols and 5 subcarriers, where C is not divisible by R. On a PRB, the transmission resources for the reference signal on layer 1 are all REs on subcarriers 1 and 2, and the transmission resources for the reference signal on layer 2 are all REs on subcarriers 3 and 4. Alternatively, the transmission resources for the reference signal on layer 1 are all REs on subcarriers 1 and 3, and the transmission resources for the reference signal on layer 2 are all REs on subcarriers 2 and 4. However, the 5th subcarrier transmits either reference signal P1 or reference signal P2, resulting in different resource allocations for reference signals on different layers. One solution is to combine multiple PRBs, such as two PRBs. For the 5th subcarrier, on odd-numbered PRBs, layer 1 is used to transmit P1+D1, and layer 2 to transmit D2; on even-numbered PRBs, layer 1 is used to transmit D1, and layer 2 to transmit P2+D2. In other examples, the number of symbols in a physical resource block can be other numbers, the number of subcarriers can be other numbers, and the number of ports can be more than 2; all can be handled similarly. Other examples or embodiments will not be described in detail.

[0156] In some examples, a PRB includes S symbols and C carriers, where at least one of S and C is not divisible by R. This results in different REs being used by reference signals on different layers; some layers have more REs used, while others have fewer. Reference signal patterns can be designed based on RE-level resource units, i.e., configuring the set of REs used by reference signals on each port (or each layer). In one example, a PRB includes L = S * C REs. If L is divisible by R, then the reference signal on each layer occupies L0 = L / R REs. In one example, the reference signal on the i-th layer is transmitted on REs (i-1) * L0 + 1 to (i-1) * L0 + L0, where i = 1, ..., R. In another example, the reference signal on the i-th layer is transmitted on REs (j-1) * L0 + i, where j = 1, ..., L0, i = 1, ..., R.

[0157] In some embodiments, if L is not divisible by R, then the reference signal on each layer occupies L0 = floor(L / R) REs. In one example, the reference signal on the i-th layer is transmitted on the (i-1)*L0+1 to (i-1)*L0+L0 REs, i = 1, ..., R. In another example, the reference signal on the i-th layer is transmitted on the (j-1)*L0+i REs, j = 1, ..., L0, i = 1, ..., R. Here, floor(x) represents the floor function of x, where x is a positive real number. The remaining L-L0 REs can be used for transmitting data and / or reference signals, respectively. In other examples, multiple PRBs can be combined for reference signal pattern design, which will not be listed here.

[0158] In some embodiments, as long as the resource unit L is not divisible by R, the portion of R*L0 can be called the first transmission resource, which is used to transmit at least the reference signal. The remaining L1 = LR*L0 resource units, excluding the first transmission resource, constitute the transmission resource, which can be used to transmit data or to transmit reference signals on selected L1 layers. When the reference signal of the i-th layer is transmitted on a resource unit, the other layers on that resource unit are only used to transmit the data on the corresponding layer. That is, on the same resource unit, only one layer transmits the reference signal and data, and the other layers are only used to transmit the data on the layer.

[0159] Based on this, a reference signal pattern is determined according to channel state information. This reference signal pattern includes frequency domain description information and / or time domain description information for transmitting reference signals at at least one layer. Reference signals and data at at least one layer are transmitted on the transmission resources indicated by the reference signal pattern. In this way, even when a mixed signal of data and reference signals is transmitted at at least one layer, different reference signal patterns are rationally designed according to different channel state information, allowing the reference signal resources of each layer to occupy different resource units based on the different channel state information. This makes the transmission of reference signals more adaptable to the current channel state information, helps reduce mutual interference between data and reference signals at different layers during transmission, and improves the reception quality of reference signals.

[0160] This disclosure provides a communication method applied to a second node. As shown in Figure 12, the method includes steps S201-S202.

[0161] S201. Obtain a reference signal pattern, the reference signal pattern including frequency domain description information and / or time domain description information for transmitting reference signals on at least one layer.

[0162] The reference signal pattern is determined based on the channel state information.

[0163] In some embodiments, obtaining a reference signal pattern includes: receiving signaling and determining a reference signal pattern based on the signaling, wherein the signaling is higher-layer and / or physical-layer signaling carrying the reference signal pattern.

[0164] In some embodiments, the channel state information includes at least one of the following: modulation order, modulation coding scheme, modulation scheme indication, channel rank, number of reference signal ports, and total number of transmission layers.

[0165] In some embodiments, if the channel state information belongs to a first channel state information or a first set of channel state information, the reference signal pattern is a first reference signal pattern; or, if the channel state information belongs to a second channel state information or a second set of channel state information, the reference signal pattern is a second reference signal pattern.

[0166] The first channel state information and the second channel state information are two different channel state information. The first channel state information set and the second channel state information set are two different channel state information sets. The first reference signal pattern and the second reference signal pattern are two different reference signal patterns among N reference signal patterns, where N is an integer greater than 1.

[0167] In some embodiments, if the channel state information is less than or equal to a first preset threshold, the reference signal pattern is a first reference signal pattern; or, if the channel state information is greater than the first preset threshold, the reference signal pattern is a second reference signal pattern; wherein, the first reference signal pattern and the second reference signal pattern are two different reference signal patterns among N reference signal patterns, and N is an integer greater than 1.

[0168] In some embodiments, the reference signal pattern is determined based on channel state information, including: the reference signal pattern is determined based on channel state information and physical layer signaling.

[0169] In some embodiments, determining a reference signal pattern based on channel state information and physical layer signaling includes one of the following: if the physical layer signaling takes a first value, the channel state information belongs to a first channel state information, or the channel state information belongs to a first set of channel state information, or the channel state information is less than or equal to a first preset threshold, the reference signal pattern is determined to be a first reference signal pattern; if the physical layer signaling takes a first value, the channel state information belongs to a second channel state information, or the channel state information belongs to a second set of channel state information, or the channel state information is greater than the first preset threshold, the reference signal pattern is determined to be a second reference signal pattern; if the physical layer signaling takes a second value, the channel state information belongs to the first channel state information, or the channel state information belongs to a first set of channel state information, or the channel state information is less than or equal to the first preset threshold, the reference signal pattern is determined to be a third reference signal pattern; if the physical layer signaling takes a second value, the channel state information belongs to the second channel state information, or the channel state information belongs to a second set of channel state information, or the channel state information is greater than the first preset threshold, the reference signal pattern is determined to be a fourth reference signal pattern.

[0170] In some embodiments, the reference signal pattern includes at least a first reference signal pattern and a second reference signal pattern, wherein one of the following conditions exists: in the first reference signal pattern, the reference signal on each layer occupies all the resource units of the transmission resource, and in the second reference signal pattern, the reference signal on each layer occupies a portion of the resource units; or, in the first reference signal pattern, the reference signal on each layer occupies L0 resource units of the transmission resource, and in the second reference signal pattern, the reference signal on each layer occupies L0+1 resource units, where L0 is floor(L / R), floor() represents the round-down operation, L is the number of resource units of the transmission resource, and R is the channel rank or the total number of transmission layers; or, in the first reference signal pattern, the number of resource units occupied on odd-numbered physical resource blocks of the transmission resource is greater than the number of resource units occupied on even-numbered physical resource blocks, and in the second reference signal pattern, the number of resource units occupied on odd-numbered physical resource blocks of the transmission resource is less than the number of resource units occupied on even-numbered physical resource blocks.

[0171] In some embodiments, the reference signal resources on each layer of the reference signal pattern are L0 resource units with consecutive resource indices.

[0172] In some embodiments, the reference signal resources on each layer of the reference signal pattern are L0 resource units with resource unit indices separated by T, where T is an integer greater than 1.

[0173] In some embodiments, the resource units occupied by the reference signal on each layer of the reference signal pattern are determined according to the time domain priority principle; or, the resource units occupied by the reference signal on each layer of the reference signal pattern are determined according to the frequency domain priority principle.

[0174] S202, Receive at least one layer of reference signal and at least one layer of data on the transmission resources indicated by the reference signal pattern.

[0175] In some embodiments, the reference signal on at least one layer includes reference signals on R layers, and the transmission resources include a first transmission resource and a second transmission resource; wherein, the first transmission resource includes L0*R resource units corresponding to the reference signals on R layers, and the second transmission resource includes resource units on the transmission resources other than the first transmission resource, L0 is floor(L / R), floor() represents the round-down operation, L is the number of resource units of the transmission resource, and R is the channel rank or the total number of transmission layers.

[0176] In some embodiments, the second transmission resource is used to transmit data, wherein one of the following conditions exists: the total data transmission power on the first transmission resource is different from the total data transmission power on the second transmission resource; the data transmission power of different layers on the first transmission resource is different; the data transmission power of different layers on the second transmission resource is different; the ratio of the total data transmission power on the first transmission resource to the power of the reference signal is different from the ratio of the total data transmission power on the second transmission resource to the power of the reference signal.

[0177] In some embodiments, the second transport resource is used to transmit reference signals on selected L1 layers, wherein the selected reference signals on selected L1 layers include one of the following: reference signals on the L1 layers with the smallest layer index; reference signals on the L1 layers with the largest layer index; reference signals on the default or agreed-upon L1 layers; reference signals on the L1 layers indicated by higher layer and / or physical layer signaling; and L1 is the number of resource units included in the second transport resource.

[0178] In some embodiments, the transmission resources include at least a first resource block and a second resource block, wherein the reference signal pattern on the first resource block is different from the reference signal pattern on the second resource block.

[0179] In some embodiments, receiving a reference signal and data on at least one layer on a transmission resource indicated by a reference signal pattern includes one of the following: receiving a reference signal on one layer and data on R-1 layers in R transmission layers of the transmission resource; receiving a reference signal and data on the first r transmission layers of the transmission resource and receiving data on the last Rr transmission layers of the transmission resource; receiving data corresponding to a target transmission layer on a target transmission layer of the transmission resource; receiving a reference signal and data corresponding to a target transmission layer on a target transmission layer of the transmission resource and receiving data corresponding to other transmission layers on other transmission layers besides the target transmission layer; wherein R is the value of the channel rank or the total number of transmission layers, and r is less than R.

[0180] Furthermore, for a detailed description of S201-S202, please refer to the relevant descriptions of S101-S102 above, which will not be repeated here.

[0181] In some embodiments, since a mixed signal of reference signal and data is transmitted on at least one layer, advanced receivers are required, such as AI-based receivers, for demodulation, channel estimation, deMIMO, and other operations. Further details are omitted in other embodiments.

[0182] Based on this, the second node acquires a reference signal pattern and, by receiving reference signals and data from at least one layer on the transmission resources indicated by the reference signal pattern, achieves accurate reception of both data and reference signals. The reference signal pattern includes frequency domain description information and / or time domain description information for transmitting reference signals from at least one layer, and is determined based on channel state information. When data and reference signals are mixed and transmitted on different layers of the same time-frequency resource block, this approach effectively utilizes limited spectrum resources while better addressing channel differences, achieving more accurate channel estimation and compensation. It also helps reduce mutual interference between data and reference signals on different layers during transmission, improving the reception quality of the reference signal.

[0183] The following also illustrates a communication device for executing the communication methods in any of the above embodiments and their possible implementations. It is understood that, in order to implement the communication methods, this communication device 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 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 specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this disclosure.

[0184] 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.

[0185] Figure 13 is a schematic diagram of a communication device provided in an embodiment of this disclosure, applied to a first node. The communication device 300 includes a processing module 301 and a communication module 302.

[0186] Processing module 301 is used to determine a reference signal pattern based on channel state information. The reference signal pattern includes frequency domain description information and / or time domain description information for transmitting reference signals at least one layer. Communication module 302 is used to transmit reference signals at least one layer and data at least one layer on the transmission resources indicated by the reference signal pattern.

[0187] In some embodiments, the processing module 301 is configured to: if the channel state information belongs to a first channel state information or a first channel state information set, determine the reference signal pattern as a first reference signal pattern; or, if the channel state information belongs to a second channel state information or a second channel state information set, determine the reference signal pattern as a second reference signal pattern; wherein the first channel state information and the second channel state information are two different channel state information, the first channel state information set and the second channel state information set are two different channel state information sets, and the first reference signal pattern and the second reference signal pattern are two different reference signal patterns among N reference signal patterns, where N is an integer greater than 1.

[0188] In some embodiments, the processing module 301 is configured to: determine the reference signal pattern as a first reference signal pattern if the channel state information is less than or equal to a first preset threshold; or determine the reference signal pattern as a second reference signal pattern if the channel state information is greater than the first preset threshold; wherein the first reference signal pattern and the second reference signal pattern are two different reference signal patterns among N reference signal patterns, and N is an integer greater than 1.

[0189] In some embodiments, the processing module 301 is configured to: generate physical layer signaling; and determine a reference signal pattern based on channel state information and physical layer signaling.

[0190] In some embodiments, the processing module 301 is configured to: determine a reference signal pattern as a first reference signal pattern if the physical layer signaling takes a first value, the channel state information belongs to a first channel state information, or the channel state information belongs to a first channel state information set, or the channel state information is less than or equal to a first preset threshold; determine a reference signal pattern as a second reference signal pattern if the physical layer signaling takes a first value, the channel state information belongs to a second channel state information, or the channel state information belongs to a second channel state information set, or the channel state information is greater than the first preset threshold; determine a reference signal pattern as a third reference signal pattern if the physical layer signaling takes a second value, the channel state information belongs to a first channel state information, or the channel state information belongs to a first channel state information set, or the channel state information is less than or equal to the first preset threshold; and determine a reference signal pattern as a fourth reference signal pattern if the physical layer signaling takes a second value, the channel state information belongs to a second channel state information, or the channel state information belongs to a second channel state information set, or the channel state information is greater than the first preset threshold.

[0191] In some embodiments, the channel state information includes at least one of the following: modulation order, modulation coding scheme, modulation scheme indication, channel rank, number of reference signal ports, and total number of transmission layers.

[0192] In some embodiments, the reference signal pattern includes at least a first reference signal pattern and a second reference signal pattern, wherein one of the following conditions exists: in the first reference signal pattern, the reference signals on each layer occupy all the resource units of the transmission resource, and in the second reference signal pattern, the reference signals on each layer occupy a portion of the resource units; or, in the first reference signal pattern, the reference signals on each layer occupy L0 resource units of the transmission resource, and in the second reference signal pattern, the reference signals on each layer occupy L0+1 resource units, where L0 is floor(L / R), floor() represents the round-down operation, L is the number of resource units of the transmission resource, and R is the channel rank or the total number of transmission layers; or...

[0193] The first reference signal pattern occupies more resource units on odd-numbered physical resource blocks than on even-numbered physical resource blocks, while the second reference signal pattern occupies fewer resource units on odd-numbered physical resource blocks than on even-numbered physical resource blocks.

[0194] In some embodiments, the reference signal resources on each layer of the reference signal pattern are L0 resource units with consecutive resource indices.

[0195] In some embodiments, the reference signal resources on each layer of the reference signal pattern are L0 resource units with resource unit indices separated by T, where T is an integer greater than 1.

[0196] In some embodiments, the resource units occupied by the reference signal on each layer of the reference signal pattern are determined according to the time domain priority principle; or, the resource units occupied by the reference signal on each layer of the reference signal pattern are determined according to the frequency domain priority principle.

[0197] In some embodiments, the reference signal on at least one layer includes reference signals on R layers, and the transmission resources include a first transmission resource and a second transmission resource; wherein, the first transmission resource includes L0*R resource units corresponding to the reference signals on R layers, and the second transmission resource includes resource units on the transmission resources other than the first transmission resource, L0 is floor(L / R), floor() represents the round-down operation, L is the number of resource units of the transmission resource, and R is the channel rank or the total number of transmission layers.

[0198] In some embodiments, the second transmission resource is used to transmit data, wherein one of the following conditions exists: the total data transmission power on the first transmission resource is different from the total data transmission power on the second transmission resource; the data transmission power of different layers on the first transmission resource is different; the data transmission power of different layers on the second transmission resource is different; the ratio of the total data transmission power on the first transmission resource to the power of the reference signal is different from the ratio of the total data transmission power on the second transmission resource to the power of the reference signal.

[0199] In some embodiments, the second transport resource is used to transmit reference signals on selected L1 layers, wherein the selected reference signals on selected L1 layers include one of the following: reference signals on the L1 layers with the smallest layer index; reference signals on the L1 layers with the largest layer index; reference signals on the default or agreed-upon L1 layers; and reference signals on the L1 layers indicated by higher layer and / or physical layer signaling; wherein L1 is the number of resource units included in the second transport resource.

[0200] In some embodiments, the transmission resources include at least a first resource block and a second resource block, wherein the reference signal pattern on the first resource block is different from the reference signal pattern on the second resource block.

[0201] In some embodiments, the communication module 302 is configured to: transmit a reference signal on one layer and data on R-1 layers in the R transmission layers of the transmission resource; transmit the reference signal and data on the first r transmission layers of the transmission resource, and transmit data on the last Rr transmission layers of the transmission resource; transmit data corresponding to the target transmission layer on the target transmission layer of the transmission resource; transmit the reference signal and data corresponding to the target transmission layer on the target transmission layer of the transmission resource, and transmit data corresponding to other transmission layers on the other transmission layers besides the target transmission layer; wherein R is the value of the channel rank, and r is less than R.

[0202] In some embodiments, the communication module 302 is further configured to transmit signaling, which is higher-layer and / or physical-layer signaling carrying a reference signal pattern.

[0203] For a more detailed description of the processing module 301, the communication module 302, and the various technical features thereof, as well as the description of their beneficial effects, please refer to the corresponding method embodiment section above, which will not be repeated here.

[0204] Figure 14 is a schematic diagram of another communication device provided in an embodiment of this disclosure, applied to a second node. The communication device 400 includes: a communication module 401.

[0205] In some embodiments, the communication module 401 is configured to acquire a reference signal pattern, the reference signal pattern including frequency domain description information and / or time domain description information for transmitting reference signals on at least one layer, the reference signal pattern being determined based on channel state information.

[0206] The communication module 401 is further configured to receive a reference signal on at least one layer and data on at least one layer on the transmission resources indicated by the reference signal pattern; in some embodiments, the communication module 401 is configured to receive signaling and determine the reference signal pattern based on the signaling, wherein the signaling is higher layer and / or physical layer signaling carrying the reference signal pattern.

[0207] In some embodiments, the communication module 401 is configured to: receive a reference signal on one layer and data on R-1 layers in the R transmission layers of the transmission resource; receive the reference signal and data on the first r transmission layers of the transmission resource, and receive data on the last Rr transmission layers of the transmission resource; receive data corresponding to the target transmission layer on the target transmission layer of the transmission resource; receive the reference signal and data corresponding to the target transmission layer on the target transmission layer of the transmission resource, and receive data corresponding to other transmission layers on the other transmission layers besides the target transmission layer; wherein R is the value of the channel rank, and r is less than R.

[0208] For a more detailed description of the communication module 401, its various technical features, and its beneficial effects, please refer to the corresponding method embodiment section above, which will not be repeated here.

[0209] It should be noted that the modules in Figure 13 or Figure 14 can also be called units; for example, a communication module can be called a communication unit. Furthermore, in the embodiments shown in Figure 13 or Figure 14, the names of the modules may not be those shown in the figures; for example, a communication module can also be called a transmitting module or a receiving module.

[0210] If the various units or modules in Figure 13 or Figure 14 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, in essence, or the parts that contribute to the prior art, 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.

[0211] In implementing the functions of the integrated modules described above in hardware, this disclosure also provides a structure for a communication device used to execute the communication method provided in this disclosure. As shown in FIG15, the communication device 500 includes: a memory 501, a processor 502, a communication interface 503, and a bus 504.

[0212] The memory 501 may be a read-only memory (ROM) or other type of static storage device capable of storing static information and instructions; it may be a random access memory (RAM) or other type of dynamic storage device capable of storing dynamic information and instructions; it may also be an electrically erasable programmable read-only memory (EEPROM), a 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.

[0213] Processor 502 may be a logic block, module, or circuit that implements or performs the various exemplary methods 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. Processor 502 may also implement or perform the various exemplary logic blocks, modules, and circuits described in conjunction with embodiments of this disclosure. Processor 502 may also be a combination that implements computational functions, such as a combination of one or more microprocessors, a combination of a DSP (digital signal processor) and a microprocessor, etc.

[0214] 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.

[0215] In some implementations, the memory 501 may 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 communication method provided in the embodiments of this disclosure.

[0216] In some implementations, memory 501 can also be integrated with processor 502.

[0217] 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, only one thick line is used to represent bus 504 in Figure 15, but this does not mean that there is only one bus or one type of bus.

[0218] 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 the communication method as described in any of the above embodiments.

[0219] In one embodiment, the computer may be the aforementioned communication device, and this disclosure does not limit the form of the computer.

[0220] 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 disks (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 for storing information and / or other machine-readable storage media. 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.

[0221] This disclosure provides a computer program product containing instructions that, when run on a computer, cause the computer to perform the communication method described in any of the above embodiments.

[0222] 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

A communication method applied to a first node, wherein, The method comprises: determining a reference signal pattern according to channel state information, the reference signal pattern comprising frequency domain description information and / or time domain description information for transmitting a reference signal on at least one layer; transmitting the reference signal on the at least one layer and data on at least one layer on transmission resources indicated by the reference signal pattern. The method of claim 1, wherein, The determining of the reference signal pattern according to the channel state information comprises: if the channel state information belongs to first channel state information or a first channel state information set, determining the reference signal pattern as a first reference signal pattern; or if the channel state information belongs to second channel state information or a second channel state information set, determining the reference signal pattern as a second reference signal pattern; wherein the first channel state information and the second channel state information are two different channel state information, the first channel state information set and the second channel state information set are two different channel state information sets, the first reference signal pattern and the second reference signal pattern are two different reference signal patterns in N reference signal patterns, and N is an integer greater than 1. The method of claim 1, wherein, The determining of the reference signal pattern according to the channel state information comprises: if the channel state information is less than or equal to a first preset threshold, determining the reference signal pattern as a first reference signal pattern; or if the channel state information is greater than the first preset threshold, determining the reference signal pattern as a second reference signal pattern; wherein the first reference signal pattern and the second reference signal pattern are two different reference signal patterns in N reference signal patterns, and N is an integer greater than 1. The method of claim 1, wherein, The determining of the reference signal pattern according to the channel state information comprises: generating physical layer signaling; determining the reference signal pattern according to the channel state information and the physical layer signaling. The method of claim 4, wherein, The determining of the reference signal pattern according to the channel state information and the physical layer signaling comprises one of: if the physical layer signaling takes a first value, the channel state information belongs to first channel state information, or the channel state information belongs to a first channel state information set, or the channel state information is less than or equal to a first preset threshold, determining the reference signal pattern as a first reference signal pattern; if the physical layer signaling takes the first value, the channel state information belongs to second channel state information, or the channel state information belongs to a second channel state information set, or the channel state information is greater than the first preset threshold, determining the reference signal pattern as a second reference signal pattern; if the physical layer signaling takes a second value, the channel state information belongs to first channel state information, or the channel state information belongs to a first channel state information set, or the channel state information is less than or equal to a first preset threshold, determining the reference signal pattern as a third reference signal pattern; or If the physical layer signaling takes the second value, the channel state information belongs to a second channel state information, or the channel state information belongs to a second channel state information set, or the channel state information is greater than a first preset threshold, the reference signal pattern is determined as a fourth reference signal pattern. The method of claim 1, wherein, The channel state information comprises at least one of the following: Modulation order, modulation and coding scheme, modulation scheme indication, channel rank, reference signal port number, total transmission layer number. The method of claim 1, wherein, The reference signal pattern comprises at least a first reference signal pattern and a second reference signal pattern, wherein one of the following conditions exists: In the first reference signal pattern, the reference signal on each layer occupies all resource units of the transmission resource, and in the second reference signal pattern, the reference signal on each layer occupies part of the resource units; or, In the first reference signal pattern, the reference signal on each layer occupies L0 resource units of the transmission resource, and in the second reference signal pattern, the reference signal on each layer occupies L0+1 resource units, wherein the L0 is floor(L / R), floor() represents a floor operation, L is the number of resource units of the transmission resource, and R is the channel rank or the total transmission layer number; or, The number of resource units occupied by the first reference signal pattern on the odd physical resource blocks of the transmission resource is greater than the number of resources occupied on the even physical resource blocks, and the number of resource units occupied by the second reference signal pattern on the odd physical resource blocks of the transmission resource is less than the number of resources occupied on the even physical resource blocks. The method of claim 1, wherein, The reference signal resource on each layer in the reference signal pattern is L0 resource units with consecutive resource indexes. The method of claim 1, wherein, The reference signal resource on each layer in the reference signal pattern is L0 resource units with indexes separated by T, wherein T is an integer greater than 1. The method of claim 1, wherein, The reference signal of each layer in the reference signal pattern is determined according to the time domain priority principle; or the reference signal of each layer in the reference signal pattern is determined according to the frequency domain priority principle. The method of claim 1, wherein, The reference signal on the at least one layer comprises reference signals on R layers, and the transmission resource comprises a first transmission resource and a second transmission resource; wherein the first transmission resource comprises L0*R resource units corresponding to the reference signals on the R layers, and the second transmission resource comprises resource units other than the first transmission resource on the transmission resource, L0 is floor(L / R), floor() represents a floor operation, L is the number of resource units of the transmission resource, and R is the channel rank or the total transmission layer number. The method of claim 11, wherein, The second transmission resource is used for transmitting data, wherein one of the following conditions exists: The total data transmission power on the first transmission resource is different from the total data transmission power on the second transmission resource; The data transmission power of different layers on the first transmission resource is different; The data transmission power of different layers on the second transmission resource is different; A ratio of a total data transmission power and a power of a reference signal on the first transmission resource is different from a ratio of a total data transmission power and a power of a reference signal on the second transmission resource. The method of claim 11, wherein, The second transmission resource is used to transmit reference signals on selected L1 layers, wherein the reference signals on the selected L1 layers include one of the following: reference signals on L1 layers with the smallest layer index; reference signals on L1 layers with the largest layer index; reference signals on L1 layers by default or convention; reference signals on L1 layers indicated by high-layer and / or physical-layer signaling; wherein the L1 is a number of resource units included in the second transmission resource. The method of claim 1, wherein, The transmission resource includes at least a first resource block and a second resource block, and a reference signal pattern on the first resource block is different from a reference signal pattern on the second resource block. The method of claim 1, wherein, The transmitting the reference signals on the at least one layer and the data on the at least one layer on the transmission resource indicated by the reference signal pattern includes one of the following: transmitting reference signals on one layer and data on R-1 layers in R transmission layers of the transmission resource; transmitting reference signals and data on the first r transmission layers of the transmission resource and transmitting data on the last R-r transmission layers of the transmission resource; transmitting data corresponding to the target transmission layer on the target transmission layer of the transmission resource; transmitting reference signals and data corresponding to the target transmission layer on the target transmission layer of the transmission resource and transmitting data corresponding to other transmission layers on the other transmission layers except the target transmission layer; wherein R is a value of a channel rank and r is less than R. The method of claim 1 further includes: transmitting signaling carrying the reference signal pattern. A communication method applied to a second node, wherein, The method includes: obtaining a reference signal pattern including frequency domain description information and / or time domain description information for transmitting reference signals on at least one layer, wherein the reference signal pattern is determined according to channel state information; receiving the reference signals on the at least one layer and the data on the at least one layer on a transmission resource indicated by the reference signal pattern. The method of claim 17, wherein, The obtaining the reference signal pattern includes: receiving signaling according to which the reference signal pattern is determined, wherein the signaling is high-layer and / or physical-layer signaling carrying the reference signal pattern. The method of claim 17, wherein the channel state information belongs to first channel state information or a first set of channel state information, and the reference signal pattern is a first reference signal pattern; or the channel state information belongs to second channel state information or a second set of channel state information, and the reference signal pattern is a second reference signal pattern; wherein the first channel state information and the second channel state information are two different channel state information, the first set of channel state information and the second set of channel state information are two different sets of channel state information, and the first reference signal pattern and the second reference signal pattern are two different reference signal patterns in N reference signal patterns, wherein N is an integer greater than 1. The method of claim 17, wherein, if the channel state information is less than or equal to a first preset threshold, the reference signal pattern is a first reference signal pattern; or if the channel state information is greater than the first preset threshold, the reference signal pattern is a second reference signal pattern; wherein the first reference signal pattern and the second reference signal are two different reference signal patterns in N reference signal patterns, and N is an integer greater than 1. The method of claim 17, wherein, The reference signal pattern is determined according to channel state information, comprising: The reference signal pattern is determined according to the channel state information and physical layer signaling. The method of claim 17, wherein, The channel state information comprises at least one of: modulation order, modulation and coding scheme, modulation scheme indication, channel rank, reference signal port number, total transmission layer number. The method of claim 17, wherein, The reference signal pattern at least includes a first reference signal pattern and a second reference signal pattern, wherein one of the following conditions exists: In the first reference signal pattern, the reference signal on each layer occupies all resource units of the transmission resource, and in the second reference signal pattern, the reference signal on each layer occupies part of the resource units; or, In the first reference signal pattern, the reference signal on each layer occupies L0 resource units of the transmission resource, and in the second reference signal pattern, the reference signal on each layer occupies L0+1 resource units, wherein L0 is floor(L / R), floor() represents a floor operation, L is the number of resource units of the transmission resource, and R is the channel rank or the total transmission layer number; or, The first reference signal pattern occupies more resource units on odd physical resource blocks of the transmission resource than on even physical resource blocks, and the second reference signal pattern occupies fewer resource units on odd physical resource blocks of the transmission resource than on even physical resource blocks. The method of claim 17, wherein, The reference signal resource on each layer in the reference signal pattern is L0 resource units with consecutive resource indexes. The method of claim 17, wherein, The reference signal resource on each layer in the reference signal pattern is L0 resource units with resource unit indexes separated by T, where T is an integer greater than 1. The method of claim 17, wherein, The reference signal on the at least one layer includes reference signals on R layers, and the transmission resource includes a first transmission resource and a second transmission resource; wherein the first transmission resource includes L0*R resource units corresponding to the reference signals on the R layers, and the second transmission resource includes resource units of the transmission resource other than the first transmission resource, L0 is floor(L / R), floor() represents a floor operation, L is the number of resource units of the transmission resource, and R is the channel rank or the total transmission layer number. The method of claim 17, wherein, The transmission resource at least includes a first resource block and a second resource block, and the reference signal pattern on the first resource block is different from the reference signal pattern on the second resource block. The method of claim 17, wherein, The receiving the reference signal on the at least one layer and the data on the at least one layer on the transmission resource indicated by the reference signal pattern comprises one of: receive a reference signal on one layer and data on R-1 layers in the R transmission layers of the transmission resource; receive a reference signal and data on the first r transmission layers of the transmission resource, and receive data on the last R-r transmission layers of the transmission resource; receive data corresponding to the target transmission layer on the target transmission layer of the transmission resource; receive a reference signal and data corresponding to the target transmission layer on the target transmission layer of the transmission resource, and receive data corresponding to other transmission layers on the other transmission layers except the target transmission layer; wherein R is a value of a channel rank, and r is less than R. A communication device comprising: a memory and a processor; wherein the memory and the processor are coupled; the memory is configured to store instructions executable by the processor; and the processor is configured to execute the instructions to perform the method according to any one of claims 1 to 28. A computer-readable storage medium, wherein, The computer readable storage medium stores computer instructions, and when the computer instructions run on the communication device, the communication device executes the method according to any one of claims 1 to 28. A computer program product, wherein, When the computer program product is executed, the method according to any one of claims 1 to 28 is implemented.

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