WO2024012130A1

WO2024012130A1 - Reception method and sending method for reference signal, and communication devices

Info

Publication number: WO2024012130A1
Application number: PCT/CN2023/099953
Authority: WO
Inventors: 鲁照华; 肖华华; 李伦; 刘文丰
Original assignee: 中兴通讯股份有限公司
Priority date: 2022-07-15
Filing date: 2023-06-13
Publication date: 2024-01-18
Also published as: CN117439718A

Abstract

Provided in the embodiments of the present application are a reception method and sending method for a reference signal, and communication devices. The reception method comprises: receiving a reference signal resource element set; according to the reference signal resource set and a reference signal processing capacity, determining a first reference signal resource element set; and, according to the first reference signal resource element set, determining first channel information, wherein the reference signal resource element set comprises N resource elements, the first reference signal resource element set comprises M resource elements, N and M are positive integers, and N is greater than M.

Description

Reference signal reception method, transmission method and communication equipment

Cross-references to related applications

This application is filed based on a Chinese patent application with application number 202210830790.0 and a filing date of July 15, 2022, and claims the priority of the Chinese patent application. The entire content of the Chinese patent application is hereby incorporated by reference into this application.

Technical field

The present application relates to communication technology, and in particular, to a reference signal receiving method, a sending method and a communication device.

Background technique

In related technologies, the receiving end device usually performs channel estimation based on the received reference signal, that is, the reference signal is mapped to a resource element (Resource Element, RE). After receiving the reference signal resource element, the receiving end device estimates the channel based on the reference signal. The resource element estimates the channel information at the corresponding resource element position, and then obtains the channel information at all resource element positions through interpolation and other methods. In order to improve the accuracy of channel estimation, one way is to increase the overhead of reference signal resource elements used in the channel estimation process, but excessive reference signal overhead will affect data transmission efficiency. If the reference signal resource element overhead is too small, it will reduce the accuracy of channel estimation. How to achieve accurate channel estimation with a small overhead of reference signal resource elements and improve the robustness of channel estimation has become an urgent problem that needs to be solved.

Contents of the invention

The present application provides a reference signal receiving method, a sending method and a communication device, which are used to determine the reference signal resource element overhead through the reference signal processing capability of the receiving end to achieve accurate and efficient estimation of channel information.

In a first aspect, embodiments of the present application provide a method for receiving a reference signal, which is applied to a first communication device. The method includes:

Receive a set of reference signal resource elements;

Determine a first reference signal resource element set according to the reference signal resource set and the reference signal processing capability of the first communication device;

Determine the first channel information according to the first reference signal resource element set;

The reference signal resource element set includes N resource elements, the first reference signal resource element set includes M resource elements, and N and M are different positive integers.

In a second aspect, embodiments of the present application provide a method for sending a reference signal, which is applied to a second communication device. The method includes:

receive the first instruction information;

Determine the number N of resource elements in the reference signal resource element set according to the first indication information, and determine the reference signal resource element set according to the value of N, where N is a positive integer;

Send the set of reference signal resource elements.

In a third aspect, embodiments of the present application provide a first communication device, including:

processor and memory;

Program instructions are stored on the memory, and when executed by the processor, the program instructions cause the processor to perform the reference signal receiving method described in the first aspect above.

In a fourth aspect, embodiments of the present application provide a second communication device, including:

processor and memory;

Program instructions are stored on the memory, and when executed by the processor, the program instructions cause the processor to perform the reference signal sending method described in the second aspect above.

In a fifth aspect, embodiments of the present application provide a computer-readable storage medium that stores program instructions. When the program instructions are executed by a computer, they implement:

The reference signal receiving method as described in the first aspect above; or,

The reference signal sending method is as described in the second aspect above.

In a sixth aspect, embodiments of the present application provide a computer program product. The computer program product stores program instructions. When executed by a computer, the program instructions cause the computer to implement:

The reference signal sending method is as described in the second aspect above.

In this embodiment of the present application, the first communication device serves as the receiving end of the reference signal, receives the reference signal resource element set from the second communication device, and then determines the first reference signal resource element based on the reference signal resource element set and its own reference signal processing capability. collection, and then based on Determine first channel information in the first reference signal resource element set, so as to obtain channel information of all resource element positions through the first channel information. Wherein, the reference signal resource element set includes N resource elements, the first reference signal resource element set includes M resource elements, N and M are positive integers and N is greater than M. Through the solution of the embodiment of the present application, the transmitted reference signal resource element set includes the reference signal resource element set used for verification and the first reference signal resource element set used for channel estimation, so that the reference signal resource element set for verification can be well utilized. The signal resource element set determines the performance of channel estimation according to the first reference signal resource element set, so as to improve the robustness of the channel estimation.

Description of drawings

Figure 1 is an architectural schematic diagram of a communication system applicable to the embodiment of the present application;

Figure 2a is a schematic diagram of reference signal pattern configuration 1;

Figure 2b is a schematic diagram of reference signal pattern configuration 2;

Figure 3 is a schematic flowchart of a reference signal receiving method provided by an embodiment of the present application;

Figure 4a is a schematic diagram of an extended DMRS type 1 pattern provided by the embodiment of the present application;

Figure 4b is a schematic diagram of an extended DMRS type 2 pattern provided by the embodiment of the present application;

Figure 5 is a schematic diagram of a reference signal pattern provided by an embodiment of the present application;

Figure 6 is a schematic flowchart of a reference signal sending method provided by an embodiment of the present application;

Figure 7 is a schematic structural diagram of a first communication device provided by an embodiment of the present application;

Figure 8 is a schematic structural diagram of a second communication device provided by an embodiment of the present application.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present application more clear, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application and are not used to limit the present application.

It should be understood that in the description of the embodiments of the present application, if “first”, “second”, etc. are described, they are only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the intended purpose. The number of technical features indicated or the sequence relationship of the technical features indicated may be implicitly indicated. "At least one" means one or more, and "plurality" means two or more. "And/or" describes the relationship between related objects, indicating that there can be three relationships. For example, A and/or B can represent the existence of A alone, the existence of A and B at the same time, or the existence of B alone. Where A and B can be singular or plural. The character "/" generally indicates that the related objects are in an "or" relationship. “At least one of the following” and similar expressions refers to any group of these items, including any group of singular or plural items. For example, at least one of a, b and c can represent: a, b, c, a and b, a and c, b and c, or, a and b and c, where a, b, c can be a single , or multiple.

In addition, the technical features involved in the various embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

The reference signal receiving method and the sending method provided by the embodiments of the present application can be applied in various communication systems, such as in at least one of the following systems: Global System for Mobile Communications (GSM) or any other second Generation cellular communication system, Universal Mobile Telecommunications System (UMTS) based on basic Wideband Code Division Multiple Access (W-CDMA), High-Speed Packet Access (HSPA) ), Long Term Evolution (LTE), LTE-Advanced, systems based on the IEEE 802.11 specification, systems based on the IEEE 802.15 specification and/or fifth generation (5G) mobile or cellular communication systems; and future mobile communication systems. However, the embodiments are not limited to the systems given as examples above, but those skilled in the art can apply the solution to other communication systems with the necessary properties.

Referring to Figure 1, Figure 1 is a schematic architectural diagram of a communication system applicable to the embodiment of the present application. The communication system 100 in Figure 1 includes multiple communication devices, and the communication devices can use air interface resources to conduct wireless communication. The communication device includes at least one network device and at least one terminal device. In the example of FIG. 1 , the network device includes the network device 110 , and the terminal device includes the terminal device 120 , the terminal device 121 , and the terminal device 122 . Wireless communication between communication devices includes: wireless communication between network devices and terminal devices, wireless communication between network devices and network devices, or wireless communication between terminal devices and terminal devices.

The network equipment in the example in Figure 1 can also be called a base station. The base station can be an evolutionary base station (Evolutional Node B, eNB or eNodeB) in Long Term Evolution (LTE) or Long Term Evolution advanced (LTEA). , base station equipment in 5G networks, or base stations in future communication systems, etc. Base stations can include various macro base stations, micro base stations, home base stations, wireless remotes, routers, Reconfigurable Intelligent Surfaces (RISs), Wireless Fidelity (WIFI) equipment or various network side equipment such as primary cell (primary cell) and cooperative cell (secondary cell), or location management function (LMF) equipment. The embodiments of the present application are not limited to this.

The terminal device in the example in Figure 1 is a device with wireless transceiver functions that can be deployed on land, including indoors or outdoors, handheld, wearable or vehicle-mounted; it can also be deployed on water (such as ships, etc.); it can also be deployed in the air (Such as on airplanes, balloons, satellites, etc.). The terminal may be a mobile phone (mobile phone), a tablet computer (Pad), a computer with wireless transceiver functions, a virtual reality (Virtual Reality, VR) terminal, an augmented reality (Augmented Reality, AR) terminal, or an industrial control (industrial control) Wireless terminals in Wireless terminals in self-driving, wireless terminals in remote medical, wireless terminals in smart grid, wireless terminals in transportation safety, smart city ), wireless terminals in smart homes, etc. The embodiments of this application do not limit application scenarios. The terminal can sometimes also be called a user, user equipment (UE), access terminal, UE unit, UE station, mobile station, mobile station, remote station, remote terminal, mobile equipment, UE terminal, wireless communication equipment, UE Agent or UE device, etc. The embodiments of the present application are not limited to this.

It should be understood that the communication system described above is to more clearly illustrate the technical solutions of the embodiments of the present application, and does not constitute a limitation on the technical solutions provided by the embodiments of the present application. Those of ordinary skill in the art will know that as the system With the evolution of architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of this application are also applicable to similar communication systems.

It should be understood that wireless communication between communication devices includes reference signal transmission (including sending or receiving) between communication devices. When reference signals are transmitted between communication devices, the device that receives the reference signal may be called a receiving device (in this embodiment, the receiving device is called the first communication device), and the device that sends the reference signal may be called a sending device. (In this embodiment of the present application, the sending device is referred to as the second communication device).

It should be understood that when transmitting reference signals in the downlink, the first communication device (receiving end device) is the terminal device, and the second communication device (transmitting end device) is the network end device; when transmitting reference signals in the uplink During transmission, the first communication device (receiving device) is a network device, and the second communication device (sending device) is a terminal device; in some other embodiments, the first communication device and the second communication device can also be both Terminal equipment, or both network equipment.

It should be understood that in order to calculate channel state information or perform channel estimation, mobility management, positioning, etc., the base station or terminal needs to send a reference signal (RS, Reference Signal). The reference signal includes but is not limited to the channel state information reference signal (Channel -State Information reference signal, CSI-RS), which includes zero power CSI-RS (Zero Power CSI-RS, ZP CSI-RS) and non-zero power CSI-RS (Non-Zero Power CSI-RS, NZP CSI -RS), Channel-State Information-Interference Measurement (CSI-IM), Sounding reference signal (SRS), Positioning Reference Signal (PRS), Synchronization signal block ( Synchronization Signals Block (SSB), Physical Broadcast Channel (PBCH), NZP CSI-RS can be used to measure channels or interference, CSI-RS can also be used for tracking, called Tracking Reference Signal (CSI-RS for Tracking, TRS), while CSI-IM is generally used to measure interference, and SRS is used for channel estimation. In addition, the set of resource elements (Resource Elements, RE) 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 embodiment of the present application, the SSB includes a synchronization signal block and/or a physical broadcast channel.

It should be understood that in order to save signaling overhead, etc., multiple reference signal resources may be divided into multiple sets (such as CSI-RS resource set, CSI-IM resource set, SRS resource set). The reference signal resource set includes at least A reference signal resource, and multiple reference signal resource sets can all come from the same reference signal resource setting (such as CSI-RS resource setting, SRS resource setting, CSI-RS resource setting, where CSI-IM resource setting can be the same as CSI-IM Resource settings are merged, both called CSI-RS resource settings) to configure parameter information.

In some embodiments, the base station configures measurement resource information, and the measurement resource information is used to obtain channel state information. The measurement resource information includes C _N channel measurement resource (Channel Measurement Resource, CMR) information and C _M interference measurement resource (Interference Measurement Resource, IMR) information, where C _N and C _M are positive integers. The base station configures measurement resource information in a reporting configuration (report config) or reporting setting (reporting setting). The C _N pieces of CMR information are used to enable the terminal to measure the channel status of each beam, and the C _M pieces of IMR information are used to enable the terminal to measure the interference suffered by each beam.

In one example, the base station configures a reference signal of at least one port, and its pattern has two main forms, including reference signal pattern configuration 1 and reference signal pattern configuration 2. Among them, the form of reference signal pattern configuration 1 can be seen in Figure 2a. Reference signal pattern configuration 1 is a reference signal configuration based on interval frequency division multiplexing (Interval Freqeuncy Domaim MultipelxingIFDM). This reference signal configuration places frequency domain subcarriers at equal intervals. Divided into multiple combs, the reference signal of a port is only sent to one of the combs. The form of the reference signal pattern configuration 2 can be seen in Figure 2b. The reference signal pattern configuration 2 is a reference signal pattern based on the frequency domain-cover code (Frequency Domaim Orthogonal Cover Code, FD-OCC). This reference signal pattern combines adjacent The Nocc subcarrier is used to transmit reference signals, where the reference signals of different ports are distinguished by OCC, where Nocc is the sequence length of the OCC. It should be noted that pilot signals or pilots can also be called reference signals, signals used for channel measurement or channel estimation, including but not limited to Demodulation Reference Signal (DMRS), CSI-RS, SRS, etc. . One of the reference signal ports includes L resource elements (RE), where L is a positive integer. RE is a time-frequency resource, including a subcarrier in the frequency domain and a symbol in the time domain.

It should be understood that the time slot may be a time slot or a sub-slot mini slot. A slot or sub-slot includes at least one symbol. The symbol here refers to the time unit in a subframe or frame or time slot, for example, it can be an orthogonal frequency division multiplexing (Orthogonal Frequency Division Multiplexing, OFDM) symbol, single carrier frequency division multiplexing multiple access (Single- Carrier Frequency Division Multiple Access, SC-FDMA) symbols, Orthogonal Frequency Division Multiple Access, OFDMA) symbols.

It should be understood that channel status information needs to be used in scenarios such as CSI feedback, beam prediction, positioning, interference management, and user scheduling. Information, such as channel status information CSI, reference signal receiving power (RSRP), channel angle, or the channel H between the second communication device and the first communication device, etc., their acquisition is inseparable from the reference signal. Design and transmission, such as DMRS, CSI-RS, SRS or PRS, etc. Channel estimation is the process of obtaining channel information at a reference signal position through a received reference signal, and then estimating channel information at other positions based on the channel information at the reference signal position, thereby obtaining complete channel state information.

For example, in DMRS-based channel estimation, for the channel H from each transmitting antenna to each receiving antenna, it may be a C*S complex matrix, where C is the number of subcarriers of the resource for transmitting data, and S is The number of symbols corresponding to the resource for transmitting data. For example, the resource for transmitting data has 12 resource blocks (RB), then H is a 144*14 matrix. Taking Figure 2a as an example, on the OFMD symbol designed with DMRS, each symbol includes two combs, each comb corresponds to 6 REs, and each RE can distinguish 2 ports through OCC. Assuming there are 2 DMRS symbols, the channels on 6*2 REs can be used to estimate the channels of 12*14 REs on a physical resource block (Physical Resource Block, PRB). In some embodiments, a port may not need 6 REs, and the channel can be well estimated with 2 REs. That is to say, 2*2 REs can be used to estimate 12*14 REs on a PRB. channel.

In related technologies, channel estimation methods mainly include two channel estimation methods: The first channel estimation method is channel estimation implemented by artificial intelligence (AI). The channel information at the reference signal is first estimated based on the reference signal, and then the channel estimation method is used. The reference signal estimates the channel information at the reference signal and inputs it into the neural network used to estimate the channel information. Of course, in some examples, the received reference signal can also be directly input into the neural network. The output result of the neural network is the channel at all locations. information. The second channel estimation method is to use interpolation to estimate the channel. First, the channel information at the reference signal is estimated based on the reference signal, and then the channel estimation value at the reference signal is used to perform interpolation calculation to obtain the channel information at other locations. Here, the interpolation algorithm includes But it is not limited to linear interpolation algorithm or linear minimum mean square error interpolation algorithm. It should be noted that in the broad definition, all channel estimation methods other than the second channel estimation method are classified as the first channel estimation method, and are not limited to AI-based channel estimation methods.

Artificial intelligence (AI) includes machine learning (ML), deep learning, reinforcement learning, transfer learning, deep reinforcement learning, meta-learning and other devices, components, software, and modules with self-learning. In some embodiments, artificial intelligence is implemented through an artificial intelligence network (or neural network). The neural network includes multiple layers, each layer includes at least one node. In one example, the neural network includes an input layer, an output layer, and at least One hidden layer, each layer of the neural network includes but is not limited to using at least a fully connected layer, a dense layer, a convolutional layer, a transposed convolutional layer, a direct connection layer, an activation function, a normalization layer, a pooling layer, etc. one. In some embodiments, each layer of the neural network may include a sub-neural network, such as a residual block (Residual Networkblock, or Resnet block), a dense network (Densenet Block), a recurrent network (Recurrent Neural Network, RNN), etc. The artificial intelligence network includes a neural network model and/or neural network parameters corresponding to the neural network model, where the neural network model may be referred to as a network model, and the neural network parameters may be referred to as network parameters. A network model defines the number of layers of the neural network, the size of each layer, activation function, link status, convolution kernel and convolution step size, convolution type (such as 1D convolution, 2D convolution, 3D convolution, hollow convolution, transposed convolution, separable convolution, grouped convolution, expanded convolution, etc.), and the network parameters are the weights and/or biases of each layer of the network in the network model and their values . A network model can correspond to multiple sets of different neural network parameter values to adapt to different scenarios. The values of network parameters can be obtained through offline training and/or online training. A neural network model can correspond to multiple different neural network parameter values. Obtain the parameters of the neural network through online training or offline training. For example, by inputting at least one sample and a label, the neural network model is trained to obtain neural network parameters.

It should be understood that the overhead of reference signal resource elements used in the channel estimation process will have an impact on the real-time performance and accuracy of the channel estimation. In order to improve the accuracy of channel estimation, one way is to increase the overhead of reference signal resource elements used in the channel estimation process, but excessive reference signal overhead will affect data transmission efficiency. If the reference signal resource element overhead is too small, it will reduce the accuracy of channel estimation. How to achieve accurate channel estimation with a small overhead of reference signal resource elements and improve the robustness of channel estimation has become an urgent problem that needs to be solved.

In view of this, embodiments of the present application provide a reference signal receiving method, a sending method and a communication device, which are used to determine the reference signal resource element overhead through the reference signal processing capability of the receiving end to achieve accurate and efficient estimation of channel information.

Referring to Figure 3, Figure 3 is a schematic flowchart of a reference signal receiving method provided by an embodiment of the present application. The method includes but is not limited to the following steps S110-S130:

S110: The first communication device receives the reference signal resource element set from the second communication device;

S120: The first communication device determines a first reference signal resource element set according to the reference signal resource set and the reference signal processing capability of the first communication device;

S130: The first communication device determines the first channel information according to the first reference signal resource element set.

The reference signal resource element set includes N resource elements, the first reference signal resource element set includes M resource elements, N and M are positive integers, and N is greater than M.

In some examples, the resource elements in the reference signal resource element set are resource elements carrying the reference signal. Specifically, the reference signal may include one of the following: DMRS, CSI-RS, SRS or PRS. Of course, other types of reference signals may also be used, and the embodiments of this application do not limit the specific types of reference signals.

The reference signal processing capabilities described in the embodiments of this application include K reference signal processing capability levels, K is a positive integer greater than 1, and one reference signal processing capability level corresponds to the value of the number of resource elements in a first reference signal resource element set. , such as the i-th reference letter The number of resource elements in the first reference signal resource element set corresponding to the number processing capability level is _Mi , where _Mi is a positive integer, i=1,...,K. In one example M _i <M _j ,i<j,j,i=1,...,K.

In some examples, different first communication devices have different computing capabilities due to different costs, different uses, and may implement different algorithms for channel estimation, thus requiring different numbers of reference signal REs to estimate channels of other REs. , to meet the system requirements. This embodiment of the present application divides first communication devices with different reference signal processing capabilities into different reference signal processing capability levels. Generally speaking, a first communication device with strong reference signal processing capabilities can estimate all resources based on fewer reference signal REs. The element's channel information.

In some examples, first communication devices with different reference signal processing capability levels have different numbers of resource elements in the corresponding first reference signal resource element set. The values of M corresponding to the K reference signal processing capability levels are respectively M1, M1,...,MK. For example, for a first communication device with a reference signal processing capability level of 1, the corresponding first reference signal resource element set includes 4 resource elements (ie, M=4); for a first communication device with a reference signal processing capability level of 2 Equipment, the corresponding first reference signal resource element set includes 6 resource elements (that is, M=6).

In some examples, the reference signal processing capability level of the first communication device can be obtained according to the signaling issued by the second communication device; or, it can be obtained according to the agreement between the first communication device and the second communication device; or, the first communication device The reference signal processing capability level is obtained by the first communication device and reported to the second communication device through signaling.

During the specific implementation process, K reference signal patterns can also be set for K reference signal processing capability levels. In the i-th reference signal pattern, each port includes Li REs. Here, K is a positive integer greater than 1, Li is a positive integer, i=1,...,K. In one example, the reference signal is DMRS type1, and there are K DMRS type1 patterns for DMRS type1. Each port corresponding to each DMRS type1 pattern includes a different number of REs. See Figure 4a, which is one of the extended DMRS type1 patterns. The pattern includes 4 ports, and each port includes 3 REs. In one example, the reference signal is DMRS type2, and there are K DMRS type2 patterns for DMRS type2. Each port corresponding to each DMRS type2 pattern includes a different number of REs. See Figure 4b. Figure 4b is one of the extended DMRS type2 patterns. The pattern includes 6 ports, and each port includes 2 REs. In one example, the reference signal is SRS, and there are K types of SRS patterns for SRS. Each port corresponding to each SRS pattern includes a different number of REs. In one example, the reference signal is CSI-RS. There are K types of CSI-RS patterns for CSI-RS, and each port corresponding to each CSI-RS pattern includes a different number of REs. It should be noted that the reference signal may also be a positioning reference signal PRS, a tracking reference signal TRS, a synchronization broadcast block SSB, etc.

In some examples, the first communication device includes K types of reference signal patterns, where the i-th reference signal pattern includes Ci ports, and each port includes L REs, where K is a positive integer greater than 1, Ci is a positive integer, i=1,...,K. As an example, the reference signal can be any one of DMRS type1, DMRS type2, SRS, CSI-RS, PRS, and TRS. It should be understood that due to different costs and uses, different terminals have different computing capabilities and may implement channel estimation algorithms differently. Therefore, different numbers of ports are needed to estimate channels to meet system requirements. Therefore, terminals need to be divided into different levels of capabilities, that is, reference signal processing capabilities. Generally speaking, users with strong reference signal processing capabilities can estimate channels of more ports based on fewer ports. In some examples, the reference signal processing capability of the terminal is divided into K reference signal processing capability levels. The k-th reference signal processing capability level corresponds to estimating the channels of a*Ak ports using the channels of a ports, where Ak is greater than 1. Number and can make a*Ak an integer, such as 2, 3, 4, 6, k = 1,...,K, K is a positive integer greater than or equal to 1. Referring to Figure 5, in the example of Figure 5, channels of 8 ports are estimated through channels of 4 ports.

In some embodiments, before step S110, the following step is also included: the first communication device feeds back first indication information to the second communication device, the first indication information is used by the second communication device to determine the resources of the reference signal resource element set. The number of elements is N.

The first indication information includes one of the following: a field in physical layer signaling, a field in higher layer signaling or higher layer signaling, or a field carried in a CSI report. In some examples, the first indication information maps the reference signal processing capability of the first device and can be used to determine the number N of resource elements of the reference signal resource element set. Specifically, the number N of resource elements in the reference signal resource element set indicates that the reference signal processing capability can be directly determined based on the first indication information, or indirectly determined through the reference signal processing capability or M, and one reference signal processing capability corresponds to one first The value of the number M of elements in the reference signal resource element set is used to determine the number N of resource elements in the reference signal resource element set. In some examples, the first indication information is used to determine the number N of resource elements of the reference signal resource element set. In some examples, the first indication information is used to determine the number M of resource elements in the first reference signal resource element set, and determine the number N of resource elements in the reference signal resource element set based on the M. In some examples it is a non-negative integer.

In some examples, the first communication device feeds back its own reference signal processing capability to the second communication device, and the second communication device configures reference signal parameters according to the reference signal processing capability fed back by the first communication device, and transmits the reference signal according to the reference signal parameters. . The first communication device receives the reference signal sent by the second communication device, and calls a corresponding algorithm according to its own reference signal processing capability to obtain channel information.

In some examples, the reference signal may be DMRS type 1. The reference signal processing capability has 4 levels. Each port in the reference signal pattern corresponding to level 4 includes 6 REs, and each port in the reference signal pattern corresponding to level 3 includes 4 REs, each port in the reference signal pattern corresponding to level 2 includes 3 REs, and each port in the reference signal pattern corresponding to level 1 includes 2 REs. Assume that the reference signal processing capability of the terminal device 21 in the example of Figure 1 is level 2. The terminal device 21 feeds back its reference signal processing capability to the network device 10 through the uplink control information. The network device 10 responds to the reference signal processing capability fed back by the terminal device 21. , at least one DMRS symbol is configured, and the port on each DMRS symbol includes 4 REs, thereby obtaining a first reference signal resource element set to be sent. Of course, terminals with other reference signal processing capabilities perform similar operations to obtain reference signal configurations corresponding to their reference signal processing capabilities.

In some examples, the reference signal may be DMRS type2, and the reference signal processing capability has 2 levels. Each port in the reference signal pattern corresponding to level 2 includes 4 REs, and each port in the reference signal pattern corresponding to level 1 includes 2 RE. Assume that the reference signal processing capability of the terminal device 21 in the example of Figure 1 is level 2. The terminal device 21 feeds back its reference signal processing capability to the network device 10 through the uplink control information. The network device 10 responds to the reference signal processing capability fed back by the terminal device 21. , at least one DMRS symbol is configured, and the port on each DMRS symbol includes 2 REs, thereby obtaining a first reference signal resource element set to be sent. Of course, terminals with other reference signal processing capabilities perform similar operations to obtain reference signal configurations corresponding to their reference signal processing capabilities.

In some examples, the reference signal may be SRS. The reference signal processing capability has 4 levels. Each port in the reference signal pattern corresponding to level 4 includes 6 REs, and each port in the reference signal pattern corresponding to level 3 includes 4 REs. RE, each port in the reference signal pattern corresponding to level 2 includes 3 REs, and each port in the reference signal pattern corresponding to level 1 includes 2 REs. Assume that the reference signal processing capability of the terminal device 21 in the example of Figure 1 is level 2. The terminal device 21 feeds back its reference signal processing capability to the network device 10 through the uplink control information. The network device 10 responds to the reference signal processing capability fed back by the terminal device 21. , at least one SRS symbol is configured, and the port on each SRS symbol includes 4 REs, thereby obtaining a set of reference signal resource elements to be sent. Of course, terminals with other reference signal processing capabilities perform similar operations to obtain reference signal configurations corresponding to their reference signal processing capabilities.

In some examples, the reference signal may be CSI-RS, and the reference signal processing capability has 4 levels. Level 4 indicates the ability to estimate 2*a ports through a port, and level 3 indicates the ability to estimate 3*a ports through a port. Port capabilities, level 2 indicates the capability of estimating 4*a ports through a port, and level 1 indicates the capability of estimating 8*a ports through a port. Assume that the reference signal processing capability of the terminal device 21 in the example of Figure 1 is level 2. The terminal device 21 feeds back its reference signal processing capability to the network device 10 through the uplink control information. The network device 10 responds to the reference signal processing capability fed back by the terminal device 21. , at least one SRS symbol is configured, each SRS symbol includes 4 CSI-RS ports, each port includes L REs, and L is a positive integer. Of course, terminals with other reference signal processing capabilities perform similar operations to obtain reference signal configurations corresponding to their reference signal processing capabilities. Here, c is a positive integer and can be 1, 2, 4, 6, 8, 12, 14, 16 wait.

In some examples, in order to facilitate the first communication device to verify whether the channel estimation method used by it meets the requirements, the second communication device may additionally configure the corresponding reference signal RE according to the reference signal processing capability fed back by the first communication device. Configure some reference signals RE for verifying the performance of the channel estimation method.

In some examples, the reference signal processing capability of the first communication device may include a first reference signal processing capability level and a second reference signal processing capability level, where the first reference signal processing capability level is used to indicate a first reference signal resource element. The number of resource elements in the set is M1, and the second reference signal processing capability level is used to indicate that the number of resource elements in the first reference signal resource element set is M2, and M2 is greater than M1.

Correspondingly, determining the first reference signal resource element set according to the reference signal resource set and the reference signal processing capability of the first communication device includes:

When N is less than M2 and greater than M1, determine M1 as the number M of resource elements in the first reference signal resource element set;

When N is greater than M2, M2 is determined as the number M of resource elements in the first reference signal resource element set.

In some examples, a first communication device may be configured with two or more reference signal processing capability levels. Taking the first communication device as the terminal device 21 in Figure 1 as an example, the terminal device 21 has two reference signal processing capability levels: level 1 and level 2. The value of M corresponding to level 1 is 6, and the value of M corresponding to level 2 is The value is 4. Assume that the number of resource elements in the reference signal resource element set received by the terminal equipment 21 is 5, then it is determined that the number of resource elements in the first reference signal resource element set is 4; assuming that the number of resource elements in the reference signal resource element set received by the terminal equipment 21 is If the number of resource elements is 8, then it is determined that the number of resource elements of the first reference signal resource element set is 6.

In some examples, the value of N and the value of M may have a one-to-one correspondence. For example, the value of N can be determined by the value of M and the offset parameter C, such as N=M+C, where N, M and C are positive integers.

C described above can be determined in any of the following ways:

First, C is an agreed value, that is, the first communication device and the second communication device agree on the value of C in advance;

Second, C is the default value, that is, the default value of C is preset on the first communication device and the second communication device;

Third, C is determined based on the received first signaling, that is, the value of C can be obtained by the second communication device, and then sent to the first communication device through the first signaling;

The fourth method is to determine C based on the value of M, such as C=floor(M*b), where floor is an upper or lower rounding function, N, M is a positive integer, b is a positive real number, and b is preferably greater than 0 is a real number less than 1;

In the fifth method, C is determined according to the reference signal processing capability level of the first communication device, that is, the value of C has a corresponding relationship with the reference signal processing capability level of the first communication device, for example: N=M+Ci, Ci is determined according to the first communication device The reference signal processing capability of the device is determined. The number of reference signal RE corresponding to the i-th reference signal processing capability is Ci, Ci is a positive integer, i=1,...,K; the value of Ci can be determined by the second communication device and passed The first signaling is sent to the first communication device, or is an agreed value or a default value;

Sixth, C is determined based on the value of M and the preset reference signal pattern, that is, the reference signal pattern contains (M+C) reference signals RE. The value of C can be determined based on the value of M.

In some examples, the value of N may be determined according to a preset reference signal pattern and the reference signal processing capability of the first communication device. The reference signal pattern has a one-to-one correspondence with the reference signal processing capability of the first communication device. According to the reference signal processing capability of the first communication device The ability can determine the reference signal pattern, and the value of N can be determined based on the reference signal pattern.

In some examples, there are K levels corresponding to the reference signal processing capabilities, the reference signal patterns may include K reference signal patterns, the i-th reference signal pattern corresponds to Ni reference signal resource elements, and the reference signal processing capabilities include K reference signals Processing capability level, K is a positive integer greater than 1, and i is a positive integer less than or equal to K. For example, the reference signal processing capability of the first communication device is level 1, and the corresponding first reference signal pattern contains 12 reference signal resource elements, that is, the value of N is 12.

In one example, different symbol groups correspond to different reference signal patterns. In another example, different symbol groups correspond to the same reference signal pattern. The symbol group includes at least one symbol. The symbols described here may be OFDM, OFDMA or SC-FDM symbols.

In some examples, different sets of reference signal resource elements may correspond to different reference signal patterns.

In some examples, M and N are not equal, generally speaking M < N.

When M is less than N, determining the first channel information based on the first reference signal resource element set specifically includes: determining the first channel information based on the first channel estimation method and the first reference signal resource element set.

Specifically, the first channel estimation method may be to obtain channel information through nonlinear processing, such as obtaining channel information through neural network processing, inputting the first reference signal resource element set into the neural network, and obtaining the first channel through neural network processing. information.

In some examples, the AI included in the terminal requires a larger estimated channel of M reference signal resources as input, and all reference signal patterns of the base station do not have reference signals exceeding M reference signal resource elements. At this time, when M Greater than or equal to N, it is necessary to degenerate to a non-artificial intelligence channel estimation method. For example, determining the first channel information based on the first reference signal resource element set, specifically including: determining based on the second channel estimation method and the first reference signal resource element set. First channel information.

Specifically, the second channel estimation method may be to obtain channel information through linear processing. Such as linear interpolation, minimum mean square error interpolation, etc.

In some examples, determining the first channel information according to the first channel estimation method and the first reference signal resource element set specifically includes the following steps:

S210: Determine the second channel information according to the first reference signal resource element set;

S220: Determine the first channel information according to the second channel information and the first channel estimation method, where the dimension of the first channel information is greater than the dimension of the second channel information.

In some examples, the first reference signal resource element includes M REs, the second channel information indicates channel information at the M REs, and then the second channel information is input to a pre-trained neural network, through which the second channel information is input based on the second The channel information is used for channel estimation and the first channel information is output. The dimension of the first channel information output by the neural network is greater than the dimension of the second channel information input to the neural network, that is, the channel information of more REs is estimated through the channel information of less REs. In an example, the channel information of c*a ports can be estimated based on the RE channel information of a port. c is a positive integer greater than 1, and a is a positive integer. In one example, for the channel information on each sending port and receiving port, the channel information on G REs can be estimated through AI based on the channel information on M REs. Generally speaking, M<G here.

In some examples, after determining the first reference signal resource element set according to the reference signal resource set and the reference signal processing capability of the first communication device, the following steps are further included:

S310: Determine the second reference signal resource element set according to the reference signal resource set and the first reference signal resource element set;

S320: Determine the third channel information according to the second reference signal resource element set.

In some examples, the first channel information and the third channel information are the same type of channel information, and the channel information includes any of the following: channel state information CSI, reference signal received power RSRP, channel angle, or second communication device to Channel H between first communication devices.

In some examples, AI-based methods for channel estimation can reduce reference signal RE overhead. However, AI parameters are trained based on data in certain scenarios, and this set of parameters may only be used for channel estimation in specific scenarios. , when the scene changes, the performance of channel estimation may degrade. However, the first communication device does not know that its estimated channel performance is not good, so some additional reference signals need to be added to help the first communication device instantly determine whether the channel estimated through AI meets the requirements.

Specifically, determining the second reference signal resource element set according to the reference signal resource set and the first reference signal resource element set may include: determining that the difference set between the resource element set and the first reference signal resource element set is the A second set of reference signal resource elements. In some examples, (N-M) resource elements that do not belong to the first reference signal resource element set are determined to be the second reference signal resource element set from the N resource elements included in the resource element set.

In some examples, when N is greater than M, after determining M REs among the N REs in the reference signal resource element set to construct the first reference signal resource element set, the remaining (N-M) REs are used to construct the second reference signal. Collection of resource elements.

In some examples, after determining the third channel information according to the second reference signal resource element set, the following steps are also included:

S330: Determine the location information of the third channel information;

S340: Determine the fourth channel information based on the location information of the third channel information and the first channel information;

S350: Determine the second indication information according to the third channel information and the fourth channel information.

The location information of the third channel information is the index of the third channel information in the first channel information.

In some examples, the position information of the third channel information represents the reference signal position corresponding to each RE in the second reference signal resource element set, for example, the position of the third channel information in the first channel information, and then obtained from the neural network Extract phase from the first channel information The channel information at the time-frequency position is obtained to obtain the fourth channel information, and then the second information information and the fourth channel information are compared to obtain the second indication information. The position here can also be an index, such as the index of an array.

It should be understood that the second indication information in the embodiment of the present application is used to indicate the channel estimation method of the communication node. That is, the second indication information is used to instruct the communication node to use the first channel estimation method or the second channel estimation method to perform channel estimation. The second indication information includes one of the following: physical layer signaling, a field in the physical layer signaling, high layer signaling, a field in the high layer signaling, or a field carried in the CSI report. When the second indication information takes the first value, the communication node uses the first channel estimation method to perform channel estimation. When the second indication information takes a second value, the communication node uses the second channel estimation method to perform channel estimation. The first value and the second value here may be Boolean values, or integer values, or real values. In a specific example the first value is FALSE and the second value is TRUE. In a specific example the first value is 0 and the second value is non-zero. In a specific example, the first value is TRUE and the second value is FLASE. In a specific example the first value is a non-zero value and the second value is 0. Of course, the second indication information may also take other values, as long as at least two channel estimation methods can be distinguished.

In some examples, the method of determining the location information of the third channel information may be any of the following:

The first method is to determine the location information of the third channel information according to the received second signaling. The location information of the third channel information can be determined by the second communication device and sent to the first communication device through the second signaling;

Second, determine the location information of the third channel information according to an agreed method.

In some examples, determining the second indication information according to the third channel information and the fourth channel information includes: determining the second indication according to the similarity or distance between the third channel information and the fourth channel information. information.

Specifically, the cosine similarity between the third channel information and the fourth channel information can be calculated, and when the cosine similarity is greater than the first threshold, the second indication information takes the first value, indicating that the communication node can use the first channel estimation method. to estimate the channel. Otherwise, the second indication information takes the second value, and the second channel estimation method is used to estimate the channel. Or, the matrix distance or the minimum mean square error value of the third channel information and the fourth channel information can be calculated. When the matrix distance or the minimum mean square error is less than the second threshold, the second indication information takes the first value, indicating The communication node may estimate the channel using the first channel estimation method. Otherwise, the second indication information takes the second value, and the second channel estimation method is used to estimate the channel. Here the first threshold and the second threshold are real numbers greater than 0.

In some examples, after determining the second indication information, it may also include: the current first channel estimation method does not meet the requirements, calculating the second channel information according to the second channel estimation method to obtain the fifth channel information, and the fifth channel The dimension of the information is equal to the dimension of the first channel information; wherein the second channel estimation method includes a linear interpolation algorithm or a linear minimum mean square error interpolation algorithm.

In some examples, after the first channel information is obtained based on the AI channel estimation method, the second indication information is obtained based on the above steps S310-S350.

If the cosine similarity is greater than or equal to the preset cosine similarity threshold, it means that the current channel estimation method meets the system requirements, and the second indication information takes the first value; if the cosine similarity is less than the preset threshold, it means the current channel estimation method If the system requirements are not met, the linear interpolation algorithm or the linear minimum mean square error interpolation algorithm needs to be used for channel estimation, and the second indication information takes the second value.

If the matrix distance is less than or equal to the preset distance threshold, it means that the current channel estimation method meets the system requirements, and the second indication information takes the first value; if the matrix distance is greater than the preset distance threshold, it means that the current channel estimation method does not meet the system requirements. According to the requirement, a linear interpolation algorithm or a linear minimum mean square error interpolation algorithm needs to be used for channel estimation, and the second indication information takes the second value.

If the minimum mean square error value is less than or equal to the preset variance threshold, it means that the current channel estimation method meets the system requirements, and the second indication information takes the first value; if the matrix distance is greater than the preset variance threshold, it means the current channel estimation method If the system requirements are not met, the linear interpolation algorithm or the linear minimum mean square error interpolation algorithm needs to be used for channel estimation, and the second indication information takes the second value.

Referring to Figure 6, Figure 6 shows another reference signal sending method provided by an embodiment of the present application. The method includes but is not limited to the following steps:

S410: The second communication device receives the first indication information from the first communication device;

S420: The second communication device determines the number N of resource elements in the reference signal resource element set according to the first indication information, and determines the reference signal resource element set according to the value of N, where N is a positive integer;

S430: The second communication device sends the reference signal resource element set to the first communication device, so that the first communication device determines the first reference signal resource element set according to the reference signal resource element set and the reference signal processing capability of the first communication device.

In some examples, determining the number N of resource elements of the reference signal resource element set according to the first indication information includes:

S421: The second communication device determines the number M of resource elements in the first reference signal resource element set according to the first indication information, and M is less than N;

S422: The second communication device determines the value of N according to the value of M, and determines N resource elements in the physical resource block to construct a reference signal resource element set.

In some examples, the first reference signal resource element set indicates the number of reference signal resource elements required by the first communication device to estimate the channel, and the value of N and the value of M have a one-to-one correspondence.

In some examples, the value of N is determined by the value of M and the offset parameter C, which is a positive integer.

In a specific example, N=M+C, where N, M and C are positive integers, and C can be determined in any of the following ways:

Third, C is determined based on the received third signaling, that is, the value of C can be obtained by the first communication device and then sent to the second communication device through the third signaling;

In some examples, the first indication information includes at least one reference signal processing capability level, and one reference signal processing capability level corresponds to a value of resource element M of the first reference signal resource element set.

In some examples, the signal carried by the resource element in the reference signal resource element set includes one of the following: demodulation reference signal DMRS, channel information reference signal CSI-RS, sounding reference signal SRS or positioning reference signal PRS.

Taking the first communication device as the terminal and the second communication device as the base station as an example, the solution of the embodiment of the present application will be described in detail through some specific examples.

In order to facilitate the terminal to verify whether the channel estimation method used meets the requirements, the base station sends some additional references for verification of the performance of the channel estimation method in addition to the number of REs corresponding to the reference signal corresponding to the reference signal processing capability fed back by the terminal. RE corresponding to the signal. In one example, the REs corresponding to the reference signals used to estimate the channel are called the first reference signal RE set of reference signals, and the reference signal REs used to verify the algorithm performance are called the second reference signal RE set. In one example, the number of REs in the first reference signal RE set is M, which is determined based on the reference signal processing capability of the terminal. The number of REs in the second reference signal RE set is C. Then the base station needs to transmit a total of reference signals. The number of REs corresponding to the signal is N=M+C, where N, M, and C are all positive integers.

In a specific example, the base station determines that the number of REs in the first reference signal RE set is M and that the number of REs in the second reference signal RE set is C based on the reference signal processing capability fed back by the terminal. The base station configures reference signals corresponding to N=M+C REs and transmits the corresponding reference signals through the N REs. The terminal receives reference signals corresponding to N REs, determines the first reference signal RE set based on the reference signal processing capability, estimates the channel information H1 based on the first reference signal RE set, inputs the channel information H1 into the neural network, and obtains the output of the neural network. Channel information H2, where the dimension of the channel information H2 is greater than the dimension of the channel information H1. For example, H1 includes channels on N1 REs, H2 includes channels on N2 REs, and N2>N1>=1. In one example, the terminal removes the reference signals corresponding to the N REs and the REs of the first reference signal RE set as the second reference signal RE set, and obtains the corresponding channel information H3 according to the second reference signal RE set. In one example, the base station and the terminal agree on the positions of the REs of the second reference signal RE set in the PRB. In one example, the base station configures and transmits the location information of the second reference signal RE set, and the terminal receives the location information of the second reference signal RE set configured by the base station. The terminal determines the channel information H4 of H2 at the RE position of the second reference signal RE set based on the position information P and H2 of the second reference signal RE set. Finally, the second instruction information is determined by comparing H4 and H3 to determine whether the corresponding neural network meets the requirements.

In a specific example, D is the matrix distance or minimum mean square error value of H3 and H4. When D is greater than the threshold T, the neural network does not meet the requirements and needs to fall back to the traditional interpolation algorithm to estimate the channel. When D is less than or equal to the threshold T, the neural network meets the requirements.

In a specific example, D is the cosine similarity of H3 and H4. When D is less than the threshold T, the neural network does not meet the requirements and needs to fall back to the traditional interpolation algorithm to estimate the channel. When D is greater than or equal to the threshold T, the neural network meets the requirements.

In a specific example, the base station configures reference signals of N REs. Different N values of the reference signals of N REs correspond to different reference signal patterns. In one example, different symbols correspond to different reference signal patterns. For example, the reference signal pattern in one symbol carrying the reference signal includes L1 REs per port, and the reference signal pattern in another symbol carrying the reference signal includes each port. A port includes L2 REs, and L1 is not equal to L2, and L1 and L2 are positive integers.

In a specific example, the base station determines that the number of REs in the first reference signal RE set is M and the number of REs in the second reference signal RE set is 0 based on the reference signal processing capability fed back by the terminal. The base station configures reference signals corresponding to N=M REs and transmits reference signals corresponding to N REs. The terminal receives reference signals corresponding to N REs, determines a first reference signal RE set based on the reference signal processing capability, and estimates channel information H1 based on the first reference signal RE set. Since N<=M, the terminal cannot obtain the channel for calibration, and the terminal uses traditional channel estimation methods by default, such as linear interpolation method or linear minimum mean square error interpolation method to obtain H2. The dimension corresponding to H2 is larger than the dimension of H1.

In a specific example, the base station determines that the number of REs in the first reference signal RE set is M based on the reference signal processing capability fed back by the terminal. The base station configures reference signals corresponding to N REs and transmits reference signals corresponding to N REs. In one example, N and M have a corresponding relationship, for example, one N corresponds to one M, N and M are positive integers, and N>M. In one example, N and M have a corresponding relationship, such as N=M+C, N, C and M are positive integers, where C is the value agreed between the base station and the terminal, and the location information corresponding to C REs is based on the agreement between the terminal and the base station. Sure. In one example, N and M have a corresponding relationship, such as N=M+C, where N, C and M are positive integers, where C is determined by the base station, and the location information of C REs needs to be indicated to the terminal. In one example, N and M have a corresponding relationship, and the size of N is determined according to the size of M. For example, N=M+C, C=floor(M*b), where floor is an upper or lower rounding function, N and M are positive integers, and b is a real number greater than 0 and less than 1, where C is determined by the base station, and the location information of C REs needs to be indicated to the terminal. In one example, N and M have a corresponding relationship, and the size of N is determined based on the size of M and the reference signal processing capability of the terminal. For example, N=M+Ci, Ci is determined based on the reference signal processing capability of the terminal, and the number of reference signal REs corresponding to the i-th reference signal processing capability is Ci, where floor is the upper or lower rounding function, N, M is a positive integer, Ci is a positive integer, i=1,...,K, K is an integer greater than 1. In one example, Ci, i=1,...,K are determined by the base station, and the location information of C REs needs to be indicated to the terminal. In one example, Ci, i=1,...,K are agreed between the base station and the terminal. value.

In a specific example, the base station determines that the number of REs in the first reference signal RE set is M1 and the number of REs in the second reference signal RE set is C based on the reference signal processing capability fed back by the terminal. The base station configures reference signals corresponding to N=M+C REs and transmits reference signals corresponding to N REs. The terminal receives reference signals corresponding to N REs. The terminal corresponds to at least two reference signal processing capabilities, in which the number of REs corresponding to reference signal processing capability 1 is M1, and the number of REs corresponding to reference signal processing capability 2 is M2. And M2>M1>=1. For each reference signal processing capability, there is a corresponding AI neural network network corresponding to it. The terminal determines which AI neural network to use based on the relationship between N, M1, and M2. In one example, M2>N>M1, the terminal determines to use the neural network 1 corresponding to the reference signal processing capability 1. The first reference signal RE set is determined based on the reference signal processing capability 1, and the channel information H1 is estimated based on the first reference signal RE set. Input H1 into neural network 1, and neural network 1 outputs H2, where the corresponding dimension of H2 is greater than the dimension of H1. And use the channel H3 corresponding to the remaining N-M1 REs to verify the performance of neural network 1.

In one example, N>M2>M1, the terminal determines to use the neural network 2 corresponding to the reference signal processing capability 2, determines the first reference signal RE set based on the reference signal processing capability 2, and estimates the channel information based on the first reference signal RE set. H1, input H1 into neural network 2, and neural network 2 outputs H2. Among them, the dimension corresponding to H2 is larger than the dimension of H1, and the channel H3 corresponding to the remaining (N-M2) REs is used to verify the performance of neural network 2.

In one example, N>M2>=M1, and the first reference signal RE set is determined according to the reference signal processing capability 2, the channel information H1 is estimated according to the first reference signal RE set, H1 is input to the neural network 1, and the neural network 1 outputs H2, input H1 into neural network 2, and neural network 2 outputs H2', where the corresponding dimensions of H2 and H2' are larger than the dimensions of H1. And use the channels H3 and H2 corresponding to the remaining (N-M2) REs to verify the performance D1 of neural network 1, and H3 and H2' to verify the performance D2 of neural network 2. In the end, whichever neural network has better performance will be used to estimate the channel.

It should be noted that in the above-mentioned embodiments, the description of each embodiment has its own emphasis. For parts that are not detailed or documented in a certain embodiment, please refer to the relevant descriptions of other embodiments.

This embodiment of the present application also provides a first communication device. As shown in Figure 7, the first communication device 800 includes but is not limited to:

Processor 810 and memory 820;

Program instructions are stored on the memory 820, and when executed by the processor 810, the program instructions cause the processor 810 to perform the information processing method described in any of the above embodiments.

In some examples, the above-mentioned processor 810 and memory 820 may be connected through a bus or other means.

In some examples, the processor 810 may use a central processing unit (Central Processing Unit, CPU). The processor can also be other general-purpose processors, Digital Signal Processor (DSP), Application Specific Integrated Circuit (ASIC), Field Programmable Gate Array (FPGA) or other Programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or the processor may be any conventional processor, etc. Or the processor 810 uses one or more integrated circuits to execute relevant programs to implement the technical solutions provided by the embodiments of this application.

As a non-transitory computer-readable storage medium, the memory 820 can be used to store non-transitory software programs and non-transitory computer executable programs, such as the reference signal receiving method described in any embodiment of this application. The processor 810 implements the above reference signal receiving method by running non-transient software programs and instructions stored in the memory 820 .

The memory 820 may include a storage program area and a storage data area, wherein the storage program area may store an operating system and an application program required for at least one function; the storage data area may store a method for receiving the above-mentioned reference signal or training of a spectrum sensing model. method. In addition, memory 820 may include high-speed random access memory, and may also include non-transitory memory, such as at least one disk storage device, flash memory device, or other non-transitory solid-state storage device. In some embodiments, the memory 820 optionally includes memory located remotely relative to the processor 810, and these remote memories may be connected to the processor 810 through a network. Examples of the above-mentioned networks include but are not limited to the Internet, intranets, local area networks, mobile communication networks and combinations thereof.

The non-transitory software programs and instructions required to implement the above reference signal receiving method are stored in the memory 820. When executed by one or more processors 810, the reference signal receiving method provided by any embodiment of the present application is executed.

This embodiment of the present application also provides a second communication device. As shown in Figure 8, the second communication device 900 includes but is not limited to:

Processor 910 and memory 920;

Program instructions are stored on the memory 920, and when executed by the processor 910, the program instructions cause the processor 910 to perform the reference signal sending method described in any of the above embodiments.

In some examples, the above-mentioned processor 910 and memory 920 may be connected through a bus or other means.

In some examples, the processor 910 may employ a central processing unit (Central Processing Unit, CPU). The processor also It can be other general-purpose processors, digital signal processors (Digital Signal Processor, DSP), application specific integrated circuits (Application Specific Integrated Circuit, ASIC), field programmable gate arrays (Field Programmable Gate Array, FPGA) or other programmable logic devices , discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or the processor may be any conventional processor, etc. Or the processor 910 uses one or more integrated circuits to execute relevant programs to implement the technical solutions provided by the embodiments of this application.

As a non-transitory computer-readable storage medium, the memory 920 can be used to store non-transitory software programs and non-transitory computer executable programs, such as reference signals executed on the second communication device side described in any embodiment of the present application. Send method. The processor 910 implements the above reference signal sending method by running non-transient software programs and instructions stored in the memory 920 .

The memory 920 may include a storage program area and a storage data area, wherein the storage program area may store an operating system and an application program required for at least one function; the storage data area may store a method for transmitting a reference signal or training of a spectrum sensing model. method. In addition, memory 920 may include high-speed random access memory, and may also include non-transitory memory, such as at least one magnetic disk storage device, flash memory device, or other non-transitory solid-state storage device. In some embodiments, the memory 920 optionally includes memory located remotely relative to the processor 910, and these remote memories may be connected to the processor 910 through a network. Examples of the above-mentioned networks include but are not limited to the Internet, intranets, local area networks, mobile communication networks and combinations thereof.

The non-transitory software programs and instructions required to implement the above reference signal transmission method are stored in the memory 920. When executed by one or more processors 910, the reference signal transmission method provided by any embodiment of the present application is executed.

Embodiments of the present application also provide a computer-readable storage medium. The computer-readable storage medium stores program instructions. When the program instructions are executed by the computer, the reference signal receiving method described in any of the above embodiments is implemented, or any of the above implementations are implemented. The example describes the sending method of the reference signal.

In a specific embodiment, the above-mentioned computer-readable storage medium can be used to implement various steps of the method for receiving the reference signal corresponding to the first communication device in the above-mentioned method embodiment.

In another specific embodiment, the above-mentioned computer-readable storage medium can be used to implement various steps of the method for sending the reference signal corresponding to the second communication device in the above-mentioned method embodiment.

The computer storage medium in the embodiment of the present application may be any combination of one or more computer-readable media. The computer-readable medium may be a computer-readable signal medium or a computer-readable storage medium. The computer-readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or device, or any combination thereof. More specific examples (non-exhaustive list) of computer readable storage media include: electrical connections having one or more conductors, portable computer disks, hard drives, random access memory (RAM), read only memory (ROM), Erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination of the above. As used herein, a computer-readable storage medium may be any tangible medium that contains or stores a program for use by or in connection with an instruction execution system, apparatus, or device.

A computer-readable signal medium may include a data signal propagated in baseband or as part of a carrier wave carrying computer-readable program code therein. Such propagated data signals may take many forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above. A computer-readable signal medium may also be any computer-readable medium other than a computer-readable storage medium that can send, propagate, or transmit a program for use by or in connection with an instruction execution system, apparatus, or device .

Program code embodied on a computer-readable medium may be transmitted using any suitable medium, including, but not limited to, wireless, wire, optical cable, RF, etc., or any suitable combination of the foregoing.

Computer program code for performing the operations of the present application may be written in one or more programming languages, including object-oriented programming languages such as Java, Smalltalk, C++, and conventional procedural programming languages, or a combination thereof. Programming language—such as "C" or a similar programming language. The program code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In situations involving remote computers, the remote computer can be connected to the user's computer through any kind of network, including a local area network (LAN) or a wide area network (WAN), or it can be connected to an external computer (such as an Internet service provider through the Internet). connect).

Embodiments of the present application provide a computer program product. The computer program product stores program instructions. When the program instructions are run on a computer, the computer implements the reference signal receiving method described in any of the above embodiments, or implements the method described in any of the above embodiments. Reference signal transmission method.

In a specific embodiment, the above computer program product can be used to implement each step of the method for receiving the reference signal corresponding to the first communication device in the above method embodiment.

In another specific embodiment, the above-mentioned computer program product can be used to implement each step of the method for sending the reference signal corresponding to the second communication device in the above-mentioned method embodiment.

The above is a detailed description of several implementations of the present application, but the present application is not limited to the above-mentioned implementations. Those skilled in the art can also make various equivalent modifications or substitutions without violating the scope of the present application. Equivalent variations or substitutions are included in within the scope of this application.

Claims

A method for receiving reference signals, applied to a first communication device, the method includes:

Receive a set of reference signal resource elements;

Determine a first reference signal resource element set according to the reference signal resource set and reference signal processing capabilities;

Determine the first channel information according to the first reference signal resource element set;

The reference signal resource element set includes N resource elements, the first reference signal resource element set includes M resource elements, N and M are positive integers and N is greater than M.
The method according to claim 1, wherein the reference signal processing capability includes K reference signal processing capability levels, and one reference signal processing capability level corresponds to a number M of resource elements in a first reference signal resource element set. Value, K is a positive integer.
The method according to claim 2, wherein the reference signal processing capability includes a first reference signal processing capability level and a second reference signal processing capability level, and the first reference signal processing capability level corresponds to the first reference signal The number of resource elements in the resource element set is M1, the second reference signal processing capability level corresponds to the number of resource elements in the first reference signal resource element set is M2, M1 and M2 are positive integers, and M2 is greater than M1.
The method according to claim 3, wherein determining the first reference signal resource element set according to the reference signal resource set and the reference signal processing capability includes:

When the N is smaller than the M2 and larger than the M1, determine that the number of resource elements of the first reference signal resource element set is M1;

When the N is greater than the M2, the number of resource elements in the first reference signal resource element set is determined to be M2.
The method of claim 1, further comprising:

Feed back first indication information, where the first indication information is used to determine the number N of resource elements of the reference signal resource element set.
The method according to claim 1, wherein the value of N and the value of M have a one-to-one correspondence.
The method according to claim 6, wherein the value of N is determined by the value of M and the offset parameter C, and C is a positive integer.
The method according to claim 1, wherein the value of N is determined according to a preset reference signal pattern and the reference signal processing capability.
The method of claim 8, wherein the reference signal pattern includes K reference signal patterns, wherein the i-th reference signal pattern corresponds to the i-th reference signal processing capability, and the i-th reference signal pattern includes N i reference signal resource elements, i=1,...,K, K is a positive integer greater than 1.
The method according to claim 1, wherein the determining the first channel information according to the first reference signal resource element set includes:

The first channel information is determined according to the first channel estimation method and the first reference signal resource element set.
The method according to claim 10, wherein the determining the first channel information according to the first channel estimation method and the first reference signal resource element set includes:

Determine the second channel information according to the first reference signal resource element set;

The first channel information is determined according to the second channel information and the first channel estimation method, wherein the dimension of the first channel information is greater than the dimension of the second channel information.
The method of claim 10, wherein the method further includes:

Determine a second reference signal resource element set according to the reference signal resource element set and the first reference signal resource element set;

The third channel information is determined according to the second reference signal resource element set.
The method according to claim 12, wherein the determining a second reference signal resource element set according to the reference signal resource element set and the first reference signal resource element set includes:

The difference set between the reference signal resource element set and the first reference signal resource element set is determined to be the second reference signal resource element set.
The method of claim 12, further comprising:

Determine the location information of the third channel information;

Determine fourth channel information according to the location information of the third channel information and the first channel information;

Second indication information is determined according to the third channel information and the fourth channel information.
The method according to claim 14, wherein the determining the location information of the third channel information includes one of the following:

Determine the location information of the third channel information according to the received second signaling; or,

The location information of the third channel information is determined according to an agreed method.
The method according to claim 14, wherein the determining the second indication information according to the third channel information and the fourth channel information includes:

The second indication information is determined according to the third channel information and the fourth channel information.
The method of claim 16, wherein the method further includes:

When the second indication information takes a second value, fifth channel information is determined according to the second channel estimation method and the second channel information, and the dimension of the fifth channel information is equal to the dimension of the first channel information. , the second channel information is determined based on the first reference signal resource element set.
A method for sending a reference signal, applied to a second communication device, the method includes:

receive the first instruction information;

Determine the number N of resource elements in the reference signal resource element set according to the first indication information, and determine the reference signal resource element set according to the value of N, where N is a positive integer;

Send the reference signal corresponding to the reference signal resource element set.
The method according to claim 18, wherein determining the number N of resource elements of the reference signal resource element set according to the first indication information includes:

Determine the number M of resource elements in the first reference signal resource element set according to the first indication information, and the M is smaller than the N;

The value of N is determined based on the value of M.
A first communication device, including:

processor and memory;

Program instructions are stored on the memory, and when executed by the processor, the program instructions cause the processor to perform the reference signal receiving method according to any one of claims 1-17.
A second communication device, including:

processor and memory;

Program instructions are stored on the memory, and when executed by the processor, the program instructions cause the processor to perform the reference signal sending method according to any one of claims 18-19.
A computer-readable storage medium that stores program instructions, wherein when the program instructions are executed by a computer, they achieve:

The reference signal receiving method according to any one of claims 1-17; or,

The reference signal sending method according to any one of claims 18-19.
A computer program product storing program instructions, wherein the program instructions, when executed by a computer, cause the computer to implement:

The reference signal receiving method according to any one of claims 1-17; or,

The reference signal sending method according to any one of claims 18-19.