Communication method, communication device, storage medium, and program product

Abstract

This disclosure provides a communication method, communication device, storage medium, and program product, relating to the field of communication technology, and can solve the technical problems of low reliability and high latency in related technologies. The method is applied to a first node, and includes: receiving a first signaling from a second node; the first signaling instructs the acquisition of channel state information during a random access procedure or secondary cell activation process at the first node.

Description

Technical Field

[0001] This disclosure relates to the field of communication technology, and in particular to a communication method, communication device, storage medium, and program product. Background Technology

[0002] In communication networks, channel state information can be obtained to assist in initiating service transmission and improve the reliability of service transmission.

[0003] Currently, channel state information acquisition suffers from low reliability and high latency. Summary of the Invention

[0004] This disclosure provides a communication method, communication device, storage medium, and program product, which can solve the technical problems of low reliability and high latency in related technologies.

[0005] On the one hand, a communication method is provided, applied to the first node, the method including:

[0006] Receive the first signaling from the second node; the first signaling indicates that the acquisition of channel state information is triggered during the random access procedure or secondary cell activation procedure of the first node.

[0007] On the other hand, a communication device is provided, which includes a receiving module.

[0008] The receiving module is used to receive the first signaling from the second node; the first signaling indicates that the acquisition of channel state information is triggered during the random access procedure or secondary cell activation procedure of the first node.

[0009] On the other hand, a communication method is provided for application to a second node, the method including:

[0010] Send the first signaling to the first node; the first signaling indicates that the acquisition of channel state information is triggered during the random access process of the first node or during the activation process of the secondary cell.

[0011] In another aspect, a communication device is provided, comprising: a transmitting module;

[0012] The sending module is used to send a first signaling to the first node; the first signaling indicates that the acquisition of channel state information is triggered during the random access process of the first node or during the activation process of the secondary cell.

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

[0014] In another aspect, a computer-readable storage medium is provided, on which computer program instructions are stored, which, when executed by a processor, implement the method described in any of the above embodiments.

[0015] In another aspect, a computer program product is provided, the computer program product including computer program instructions that, when executed by a processor, implement the method described in any of the above embodiments.

[0016] This disclosure provides a communication method. By instructing a first signaling to trigger the acquisition of channel state information during the random access procedure or secondary cell activation procedure of a first node, the first node can perform related operations for acquiring channel state information during the random access procedure or secondary cell activation procedure, such as sending or receiving reference signals, measuring channel state information, and reporting channel state information. In this way, the communication network can acquire channel state information during the random access procedure or secondary cell activation procedure of the first node, reducing the latency of channel state information acquisition and enabling faster and more reliable assistance to subsequent communication. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in this disclosure, the accompanying drawings used in some embodiments of this disclosure will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings.

[0018] Figure 1 This disclosure provides a system architecture diagram of a communication system.

[0019] Figure 2 A flowchart illustrating a communication method provided in this disclosure;

[0020] Figure 3 This is a schematic diagram of a channel state information acquisition process provided in this disclosure;

[0021] Figure 4 This is a schematic diagram of another channel state information acquisition process provided in this disclosure;

[0022] Figure 5 This is a schematic diagram of another channel state information acquisition process provided in this disclosure;

[0023] Figure 6 A flowchart illustrating another communication method provided in this disclosure;

[0024] Figure 7 This is a schematic diagram of the reasoning process of an artificial intelligence model on the terminal side provided in this disclosure;

[0025] Figure 8 This is a schematic diagram of the internal structure of a model for CSI-RS resource prediction provided in this disclosure;

[0026] Figure 9 This is a schematic diagram of a typical MAC CE structure that simultaneously performs secondary cell activation and triggers channel state information acquisition, as provided in this disclosure.

[0027] Figure 10 This is a schematic diagram of a process for obtaining channel state information before secondary cell activation during random access, as provided in this disclosure.

[0028] Figure 11 This is a schematic diagram of a process for obtaining channel state information before cell handover during random access, as provided in this disclosure.

[0029] Figure 12 This is a schematic diagram of the structure of a communication device provided in this disclosure;

[0030] Figure 13 A schematic diagram of another communication device provided in this disclosure. Detailed Implementation

[0031] The technical solutions of this disclosure will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments of this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0032] It should be noted that, in this disclosure, the terms "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in this disclosure should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of terms such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner.

[0033] Hereinafter, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0034] In the description of this disclosure, unless otherwise stated, " / " means "or," for example, A / B can mean A or B. "And / or" in this document is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, and B alone. Furthermore, "at least one" means one or more, and "more than one" means two or more.

[0035] In some embodiments, the term "determine" may encompass a wide variety of actions. For example, "determine" may include calculation, processing, deduction, investigation, instruction, lookup (e.g., searching in a table, database, or other data structure), etc. Furthermore, "determine" may include sending (e.g., sending information), receiving (e.g., receiving information), accessing (e.g., accessing data in memory), etc. Additionally, "determine" may include resolving, selecting, establishing, etc.

[0036] In communication networks, channel state information can be obtained to assist in initiating service transmission and improve the reliability of service transmission.

[0037] Currently, channel state information acquisition suffers from low reliability and high latency.

[0038] Specifically, during random access, especially during the transition from idle or inactive to connected (RRC connected) state, fine-grained downlink or uplink channel state information cannot be obtained through Channel State Information Reference Signal (CSI-RS) or Sounding Reference Signal (SRS) measurements. Instead, coarse-grained downlink or uplink spatial filtering (beamforming) information can only be obtained using synchronization or preamble signals. Fine-grained channel state information can only be obtained based on CSI-RS or SRS measurements after entering the connected state. Furthermore, during secondary cell (Scell) activation, the terminal is unaware of the configuration information of the reference signal for the secondary cell to be activated. Therefore, fine-grained channel state information for the secondary cell cannot be obtained through measurement; fine-grained channel state information can only be obtained based on CSI-RS or SRS measurements after entering the connected state. During the above state transition or activation processes, the channel state information of the connected or pending cell cannot be obtained quickly. This results in slow convergence and significant latency in the acquisition of channel state information after link establishment, hindering the rapid initiation of stable service transmission. Therefore, it is necessary to consider reducing the latency of channel state information acquisition in the above scenarios.

[0039] To address the aforementioned technical problems, this disclosure provides a communication method. By instructing a first signaling signal to trigger the acquisition of channel state information during the random access procedure or secondary cell activation procedure of a first node, the first node can perform related operations for acquiring channel state information during the random access procedure or secondary cell activation procedure, such as transmitting or receiving reference signals, measuring channel state information, and reporting channel state information. In this way, the communication network can acquire channel state information during the random access procedure or secondary cell activation procedure of the first node, reducing the latency of channel state information acquisition and enabling faster and more reliable assistance to subsequent communication.

[0040] The communication method provided in this disclosure can be applied to systems with various communication standards. For example, the systems to which the communication method provided in this disclosure is applicable include, but are not limited to, long-term evolution (LTE) systems, various versions based on LTE evolution, 5G systems, future mobile communication networks (such as 6G mobile communication networks), or multiple converged communication systems. Furthermore, the communication method provided in this disclosure can also be applied to future-oriented communication systems.

[0041] For example, the above communication method can be applied to, for example, Figure 1 In the aforementioned communication system, such as Figure 1 As shown, the communication system includes: a first node 101 and a second node 102.

[0042] The first node 101 is used to receive a first signaling from the second node 102; the first signaling indicates that the acquisition of channel state information is triggered during the random access procedure or secondary cell activation procedure of the first node 101.

[0043] The second node 102 is used to send a first signaling to the first node 101; the first signaling indicates that the acquisition of channel state information is triggered during the random access process of the first node 101 or during the activation process of the secondary cell.

[0044] In some embodiments, the first node 101 can be a terminal and the second node 102 can be a base station.

[0045] In some embodiments, the terminal can be a device with wireless transceiver capabilities, which can be deployed on land, including indoors or outdoors, handheld, wearable, or vehicle-mounted; it can also be deployed on water (such as on ships); and it can also be deployed in the air (e.g., on airplanes, balloons, and satellites). The terminal can be a mobile phone, tablet computer, computer with wireless transceiver capabilities, virtual reality (VR) terminal, augmented reality (AR) terminal, wireless terminal in industrial control, wireless terminal in self-driving, wireless terminal in remote medical care, wireless terminal in smart grid, wireless terminal in transportation safety, wireless terminal in smart city, wireless terminal in smart home, etc. The embodiments of this application do not limit the application scenarios. The term "terminal" can sometimes also refer to a user, user equipment (UE), access terminal, UE unit, UE station, mobile station, mobile station, remote station, remote terminal, mobile device, UE terminal, wireless communication device, UE agent, or UE device, etc., but the embodiments of this application do not limit this to these terms.

[0046] In some embodiments, the base station may be a base station in Long Term Evolution (LTE), Long Term Evolution Advanced (LTEA), or an evolved Node B (eNB or eNodeB), a base station device in a 5G network, or a base station in a future communication system. The base station may include various macro base stations, micro base stations, home base stations, wireless remote extensions, reconfigurable intelligent surfaces (RISs), routers, wireless fidelity (WIFI) devices, or various network-side devices such as primary cells and secondary cells.

[0047] It should be noted that the integration of mobile communication systems with AI / ML (Artificial Intelligence (AI) / Machine Learning (ML)) is an inevitable trend for the future. For example, the integration of AI / ML technology with mobile communication systems has already been attempted in 5G (fifth generation) and 5G-A (5G-Advanced). In the future design of 6G mobile communication systems, AI / ML will be a key technology inherent in mobile communication systems.

[0048] Artificial intelligence (AI) encompasses self-learning devices, components, software, and modules such as machine learning, deep learning, reinforcement learning, transfer learning, deep reinforcement learning, and meta-learning. In some cases, AI is implemented through AI networks (or neural networks). A neural network consists of multiple layers, each containing at least one node. Typically, a 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 one of the following: fully connected layers, dense layers, convolutional layers, transposed convolutional layers, directly connected layers, activation functions, normalization layers, and pooling layers. In other cases, each layer of the neural network may include a sub-neural network, such as a residual network block (or ResNet block), a dense network (DenseNet block), or a recurrent neural network (RNN). AI networks include the neural network model and / or the corresponding neural network parameters. The neural network model can be simply referred to as the network model, and the neural network parameters can be simply referred to as network parameters. A network model defines the architecture of a neural network, including the number of layers, the size of each layer, the activation function, the connections, the convolutional kernels and strides, and the convolution type (e.g., 1D convolution, 2D convolution, 3D convolution, hollow convolution, transposed convolution, separable convolution, grouped convolution, expanded convolution, etc.). Network parameters are the weights and / or biases of each layer 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, such as training the neural network model by inputting at least one sample and label. A neural network model can correspond to multiple different neural network parameter values.

[0049] AI / ML (Artificial Intelligence / Machine Learning) is a promising direction for enhancing mobile communication systems. Introducing AI / ML technologies into mobile communication systems, such as 5G (fifth generation), 5G-A (5G-Advanced), and 6G (sixth generation), can improve system efficiency. For example, AI / ML inference and prediction can reduce reference signal overhead, reduce channel state information feedback overhead, or improve the accuracy of user interface (UE) positioning. Its benefits have been preliminarily verified or are currently being verified.

[0050] For communication systems employing AI / ML technology, in all parts of this application, the narrow definition of an AI / ML model is: a mathematical algorithm that applies machine learning techniques to generate a set of outputs based on a set of inputs. It may include metadata, which includes relevant information about the training model and the applicable operating environment. The AI / ML model can be managed, stored, and transmitted as an artifact, which may be a container, image, or proprietary file format.

[0051] In a broad sense, an AI / ML "model" is a general term used to describe a device's ability to perform processing methods, functions, features, or groups of features. A "model" can be a function, functional module, processing method, information processing method, implementation method, functional group, configuration, configuration set, dataset (e.g., for model training), or data-driven algorithm, etc.

[0052] In all parts of this application, the terms algorithm, function, algorithm function, or function algorithm may be used to describe the model, algorithm, function, algorithm function, or function algorithm, unless otherwise specified, and their connotations and meanings are the same.

[0053] In all parts of this application, when AI and ML are described separately, AI and ML are used interchangeably. AI / ML is equivalent to AI and ML used alone.

[0054] It should be noted that, Figure 1 This is just an example framework diagram. Figure 1 The number of devices included and the names of each device are unlimited.

[0055] The application scenarios of the embodiments disclosed herein are not limited. The system architecture and business scenarios described in the embodiments of this disclosure are for the purpose of more clearly illustrating the technical solutions of the embodiments of this disclosure, and do not constitute a limitation on the technical solutions provided by the embodiments of this disclosure. As those skilled in the art will know, with the evolution of network architecture and the emergence of new business scenarios, the technical solutions provided by the embodiments of this disclosure are also applicable to similar technical problems.

[0056] The communication method provided in the embodiments of this disclosure will now be described in detail with reference to the accompanying drawings.

[0057] The communication method provided in this disclosure can be applied to... Figure 1 The first node 101 in the communication system shown. Figure 2 A flowchart of a communication method is shown, such as... Figure 2 As shown, the communication method includes the following S201:

[0058] S201, Receive the first signaling from the second node.

[0059] The first signaling instruction indicates that the acquisition of channel state information is triggered during the random access procedure or secondary cell activation procedure of the first node.

[0060] It should be noted that since the first signaling can instruct the acquisition of channel state information during the random access procedure or secondary cell activation procedure of the first node, the first node can perform relevant operations for acquiring channel state information during the random access procedure or secondary cell activation procedure, such as sending or receiving reference signals, measuring channel state information, and reporting channel state information. In this way, the communication network can acquire channel state information during the random access procedure or secondary cell activation procedure of the first node, reducing the latency of acquiring channel state information and enabling subsequent communication to be assisted more quickly and reliably.

[0061] In some embodiments, the first signaling is carried in a first message; the first message is at least one of the following: message 4 (Msg4) of a four-step random access procedure, message B (MsgB) of a two-step random access procedure, a system message, or a Medium Access Control Control Element (MAC CE); the system message includes at least a Master Information Block (MIB) and / or a System Information Block (SIB, or denoted as SIB1 / x). That is, in one possible implementation, channel state information acquisition can be indicated in the transmission of the fourth step message 4 of a conventional four-step random access procedure or in the second step message B of a two-step random access procedure.

[0062] For example, assuming the first node is a terminal UE and the second node is a base station, such as... Figure 3The diagram illustrates a process for obtaining channel state information according to an embodiment of this disclosure. It shows the process of triggering the measurement / channel state information reference signal and reporting the channel state information through message 4. In this process, during the four-step random access initiated by the terminal UE when switching from an idle / inactive state to a Radio Resource Control (RRC) connected state, it first receives a Synchronization Signal Block (SSB), obtains synchronization from the Synchronization Signal (SS), and obtains important system messages from the MIB. Then, it receives the Control Channel (PDCCH) and the Physical Downlink Shared Channel (PDSCH) scheduled by the Physical Downlink Control Channel (PDCCH). The PDSCH carries SIB1 / x, which indicates more basic system messages to the terminal UE for initial access. The terminal UE then sends Msg1 (carried on the Physical Random Access Channel) to the Physical Random Access Channel (PRAN). The terminal initiates the initial access procedure on the PRACH channel and receives the base station's response message to Msg1 from Msg2. The response message confirms the successful reception of the preamble contained in Msg1 and schedules resources for Msg3PUSCH. The terminal sends Msg3 to the base station to transmit signaling such as the Common Control Channel (CCCH). Afterwards, the terminal receives Msg4 to handle conflict resolution. Once the conflict is resolved, the terminal sends Msg5 to the base station to confirm the successful reception of Msg4. Then, after a series of bidirectional RRC signaling handshakes, it enters the RRC connection state. If it is necessary to reduce the delay time of obtaining channel state information after the random access procedure, a trigger signaling for obtaining channel state information can be indicated during the random access procedure. The signaling can indicate actions such as triggering SRS transmission, CSI-RS measurement, or CSI reporting. This trigger signaling can be carried by Msg4. When the terminal UE receives the triggered SRS indication carried in Msg4, it sends SRS; when it receives the triggered CSI-RS measurement indication, it performs CSI-RS measurement; when it receives the triggered CSI report (which can be scheduled by downlink control information on the physical uplink shared channel), it reports the CSI-RS measurement results (sent on the physical uplink shared channel). Since the report is based on the measurement, the triggered CSI report is essentially based on the triggered CSI-RS measurement indication.

[0063] In one possible implementation, during the two-step random access process, when the MsgB contains a Success Random Access Response (successRAR) message, the MsgB can instruct signaling actions such as SRS transmission, CSI-RS measurement, or CSI reporting. When the MsgB contains a Fallback Random Access Response (FallbackRAR) message, the signaling instruction for triggering channel state information acquisition is deferred and carried in Msg4.

[0064] In some embodiments, when the first message is at least one of message 4 of a four-step random access procedure, message B of a two-step random access procedure, or a system information block.

[0065] The first signaling is carried in the downlink control information of the first message; or,

[0066] The first signaling is carried in the physical shared channel of the downlink control information scheduling of the first message.

[0067] In some embodiments, the first signaling includes at least one of the following: channel state information reporting triggering signaling, channel state information reference signal measurement resource indication information, probe reference signal triggering signaling, signal configuration information for measuring channel state information, and channel state information reporting configuration information. Specifically, the channel state information reporting triggering signaling can trigger the first node to send a channel state information report, so that the second node can obtain the channel state information report and thus obtain channel state information. The channel state information reference signal measurement resource indication information can indicate the resources that the first node needs to detect / measure when receiving / measuring the channel state information reference signal. The probe reference signal triggering signaling can trigger the first node to send a probe reference signal. The channel state information reporting configuration information can configure the resources required by the first node when reporting the channel state information report.

[0068] In some embodiments, the measurement resources of the channel state information reference signal are determined based on a set of measurement resources and an index that identifies the measurement resources in the set of measurement resources; or, the measurement resources of the channel state information reference signal are determined based on indication information that indicates the measurement resources. Wherein, the measurement resources of the channel state information reference signal are determined based on a set of measurement resources and an index that identifies the measurement resources in the set of measurement resources, that is, the first node can determine from the set of measurement resources the second node needs to transmit the channel state reference signal, or in other words, the resources required to receive / detect the channel state reference signal, by using the index. Thus, the first signaling can indicate the measurement resources of the channel state information reference signal using only the index, which can reduce the resource overhead of the first signaling.

[0069] In some embodiments, the triggering signaling for a channel state information report includes at least one of the following: the triggering state of the channel state information, the type of the channel state information report, the format of the channel state information report, and the reporting resources for the channel state information report.

[0070] In some embodiments, the measurement resources of the channel state information reference signal are included in the triggering signaling of the channel state information report. That is, the measurement resources of the channel state information reference signal indicated in the first signaling can be combined with the triggering signaling of the channel state information report.

[0071] In some embodiments, there are one or more trigger states for channel state information reporting; each trigger state corresponds to a channel state information reporting configuration and a measurement resource for a channel state information reference signal; the channel state information reporting configuration includes at least one of a channel state information report type, a channel state information report format, and a channel state information report reporting resource. Thus, the trigger state can indicate / determine whether the channel state information reporting configuration and the measurement resource for the channel state information reference signal corresponding to the trigger state have been triggered, thereby allowing the first node to know whether to perform the transmission / reporting of a channel state information report based on the channel state information reporting configuration and the measurement resource for the channel state information reference signal corresponding to the trigger state.

[0072] In some embodiments, the triggering signaling for the probe reference signal includes at least one of the following: a probe reference signal resource set indicator, a probe reference signal resource indicator, a second probe reference signal resource indicator, a probe reference signal request (dynamically instructing the UE to trigger the reporting of an aperiodic or semi-persistent SRS resource set), or a probe reference signal offset (or probe reference signal offset indicator). The probe reference signal offset can specify the offset of the starting time slot of the SRS transmission relative to the time slot where the DCI is located.

[0073] In some embodiments, the first node has the capability to process compressed channel state information reports using artificial intelligence; the signaling that triggers the channel state information report is the signaling related to the artificial intelligence processing of the compressed channel state information report. Thus, the first node can report compressed channel state information reports processed by artificial intelligence, thereby reducing the resource overhead required for reporting channel state information reports.

[0074] In some embodiments, the triggering signaling for a channel state information (CSO) report includes at least one of the following: compression type, target channel state information, quantization codebook configuration, whether a one-sided or two-sided model is used, the index of the artificial intelligence (AI) model, whether joint source channels supporting CSO reports are supported, and the compression method of modulation and coding. In one possible implementation, the target CSO can be an input to the AI ​​model, representing the target channel state information, which can be understood as the label information required for training the AI ​​model. It originates from measurements, specifically the channel matrix H obtained based on a reference signal measurement or precoding obtained based on H. This measurement may have undergone some quantization (with some quantization loss) before being used as the label input to the model. The base station trains a model based on this label and other datasets, as a two-sided model. The terminal side also needs to train a corresponding model, so this label, as part of the dataset, needs to be configured or transmitted to the terminal. In one possible implementation, whether a one-sided or two-sided model is used—that is, whether the CSO report generation uses a one-sided or two-sided model—is used in the triggering signaling to notify the first node whether the CSO report generation uses a one-sided model, a two-sided model, or neither. In one possible implementation, whether a joint source channel for channel state information reporting is supported, used to notify the first node whether the channel state report uses the joint source channel technique, so that the first node can perform the corresponding processing.

[0075] In some embodiments, the cyclic redundancy check (CRRC) of the downlink control information is scrambled based on the Temporary Cell Radio Network Temporary Identifier (TC-RNTI) corresponding to the first message or the Radio Network Temporary Identifier (MsgB-RNTI) of message B. For example, the CRRC is scrambled based on the TC-RNTI corresponding to message 4. This allows the downlink control information to be identified as being for the first node, avoiding interference with the random access process of other nodes in the communication network.

[0076] In some embodiments, the method further includes: sending capability information of the first node to the second node; the capability information indicates the first node's ability to trigger channel state information acquisition during random access (or, in other words, the capability information indicates information related to the first node's ability to trigger channel state information acquisition during random access). By indicating the capability information, the second node can configure the first node based on its capabilities, ensuring that the first node can reliably trigger channel state information acquisition.

[0077] In some embodiments, capability information is carried in message 3; or, capability information is carried in message A. In one possible implementation, capability information can be carried in message 3 during a four-step random access process. During a two-step random access process, capability information can be carried in message A.

[0078] In some embodiments, capability information includes or is used to indicate at least one of the following of the first node (or to indicate the capabilities corresponding to at least one of the following of the first node; or to indicate at least one of the following that the first node can support): the number of antenna ports of the channel state information reference signal, the density of measurement resources of the channel state information reference signal, the type of the channel state information reference signal, the processing capability of the channel state information reference signal, the transmit antenna switching capability of the probe reference signal, the number of time-domain symbols corresponding to the probe reference signal, the bandwidth of the probe reference signal, the comb structure of the probe reference signal, and the capability of artificial intelligence processing to compress channel state information reports. Wherein, the comb structure of the probe reference signal is a comb structure that the first node can support, and the comb structure of the probe reference signal is that the probe reference signal uses equally spaced sparse subcarrier mapping in the frequency domain. The capability of artificial intelligence processing to compress channel state information reports is used to indicate the first node's ability to process compressed channel state information reports using artificial intelligence, so that the second node can compress the channel state information reports in an appropriate manner.

[0079] In some embodiments, the method further includes: receiving a system message; the system message includes a set of configuration information for acquiring channel state information, the set of configuration information corresponding to the capability to acquire channel state information. This can be understood as the set of configuration information including configuration information corresponding to various acquisition capabilities, allowing each terminal / node in the communication system to select configuration information that matches its own capabilities.

[0080] In some embodiments, the first signaling further instructs the acquisition of configuration information corresponding to the capabilities of the first node from a set of configuration information; the method further includes: based on the first signaling, acquiring configuration information corresponding to the capabilities of the first node from a set of configuration information obtained from channel state information. Thus, the first node can directly determine the configuration information corresponding to its own capabilities from a pre-configured set of configuration information, reducing the amount of information that the first signaling needs to indicate and reducing the resource overhead of the first signaling.

[0081] In some embodiments, the first signaling indicates that channel state information is acquired during the secondary cell activation process; the first signaling is carried in a media access control control cell for activating the secondary cell.

[0082] It should be noted that secondary cell activation is used for long-term energy-saving management of terminals and is suitable for activating secondary cells when services arrive during idle periods at hourly / minutely levels. Generally, secondary cell activation controls the full activation or deactivation of the secondary cell's radio frequency link through MAC CE (SCell Activation / Deactivation MAC CE) signaling. When activated, the terminal turns on the radio frequency within the cell, allowing data transmission; when deactivated, the radio frequency is turned off, and all transmit and receive operations cease, including typical channel state information acquisition behaviors such as reference signal measurement. To reduce the delay in acquiring channel state information during secondary cell activation, rather than after activation is complete, the terminal can be triggered to send SRS signals, perform CSI-RS measurements, or report CSI data in the secondary cell via the MAC CE signaling during activation.

[0083] For example, suppose the first node is a terminal and the second node is a network (or a network-side node), such as... Figure 4The diagram illustrates another channel state information acquisition process provided in this disclosure. It shows the process of triggering the measurement of the sounding reference signal / channel state information reference signal / channel state information reporting by activating the media access control control cell of the secondary cell. In the process of triggering channel state information acquisition during the activation of the secondary cell, firstly, RRC parameters are pre-configured in the RRC connected state. The network generally sends the frequency point, bandwidth, time division duplexing (TDD) frame structure and other parameters of the secondary cell through the RRC reconfiguration message of the primary cell (PCell). The UE stores the configuration but does not enable the radio frequency on the secondary cell. Then, the network sends the MAC control unit (CE) to activate the secondary cell. This signaling indicates the secondary cell activation bitmap (1 bit / SCell). The bitmap indicates whether each secondary cell is activated. The MAC CE also indicates the triggering of SRS transmission, CSI-RS measurement or CSI reporting. After receiving the MAC CE, the UE activates the secondary cell radio frequency link within a specified time and immediately performs SRS transmission, CSI-RS measurement or CSI reporting according to the triggering signaling. It's important to note that the immediate acquisition of channel state information (CSA) after activating the radio frequency (RF) via MAC CE is based on the scenario where the secondary cell has been previously activated and its configuration is retained. If the secondary cell is activating for the first time, before acquiring CSA, it's still necessary to scan the Synchronization Signal Block (SSB), capture the Physical Cell Identifier (PCI), obtain cell timing and frequency synchronization, and decode the MIB. This requires the terminal to first receive the SSB configured by the Scell, not the CSI-RS. If the secondary cell is not activating for the first time, time or frequency drift can be calibrated through the CSA process, such as receiving CSI-RS. In other words, after activating the RF, the terminal can perform the following steps:

[0084] Receive SSB from the secondary cell; send Channel State Information Report (CSI report on PUCCH) to the primary cell via the Physical Uplink Control Channel; send SRS; perform CSI-RS measurement (CSI-RS is sent by the secondary cell); receive downlink control information from the primary cell, which is used to schedule the Physical Uplink Shared Channel, and send Channel State Information Report (CSI report on PUSCH) to the secondary cell on the Physical Uplink Shared Channel.

[0085] In some embodiments, the media access control control cell satisfies at least one of the following:

[0086] When a channel state information reference signal measurement is triggered, the media access control control cell indicates the index of the measurement resource for the channel state information reference signal, or the media access control control cell indicates the index of the measurement resource set and the index of the measurement resource for the channel state information reference signal determined in the measurement resource set;

[0087] When a channel state information report is triggered, the media access control control cell indicates the configuration index of the channel state information report, the index of the resource set for the channel state information report, and the index of the resource for determining the channel state information report in the resource set; or, when a channel state information report is triggered, the media access control control cell indicates the configuration index of the channel state information report and the index of the measurement resource of the channel state information reference signal; or, when a channel state information report is triggered, the media access control control cell indicates the subset corresponding to the enabled channel state information trigger state.

[0088] When the transmission of a probe reference signal is triggered, the Media Access Control (MAC) control cell indicates the index of the resource set of the probe reference signal and the index of the resource in the resource set that determines the probe reference signal, or the MAC control cell indicates the index of the resource of the probe reference signal.

[0089] In some embodiments, when a channel state information (CSI) report is triggered, the media access control (MAC) control cell enables a subset corresponding to the CSI trigger state. This subset, along with the CSI request field in the downlink control information format, jointly triggers the CSI report. This allows the downlink control information and the MAC control cell to jointly trigger the CSI report, reducing the resource overhead of the MAC control cell. It should be noted that the downlink control information format contains multiple bit fields (each bit field includes at least one bit, which can be understood as a bit segment), including the CSI request field, which can jointly trigger the CSI report with the subset corresponding to the CSI trigger state.

[0090] In some embodiments, the first signaling indicates that the acquisition of channel state information is triggered in the case of a random access procedure at the first node and the existence of the first procedure;

[0091] The first process includes at least one of the following: secondary cell activation, band transfer, cell transfer, or bandwidth part (BWP) transfer.

[0092] The first signaling bearer is in any one or a combination of at least two of the following: the main information block, the system information block, message 2 in the random access procedure, and message 4 in the random access procedure.

[0093] It should be noted that during the random access process from idle / inactive state to active state, if secondary cell activation, frequency band transfer, cell transfer, or partial bandwidth transfer occurs simultaneously, channel state information acquisition must be triggered before the access process is completed, secondary cell activation, frequency band transfer, cell transfer, or partial bandwidth transfer.

[0094] For example, taking frequency band transfer as an example, assuming the first node is the terminal, such as... Figure 5 The diagram illustrates another channel state information acquisition process provided by this embodiment. It shows the process of triggering the measurement of the probe reference signal / channel state information reference signal / channel state information reporting when a frequency band transfer (e.g., from a base station corresponding to frequency band A to a base station corresponding to frequency band B) occurs simultaneously during random access transition from idle / inactive state to active state. Before the frequency band transfer, the terminal is unaware of any synchronization information in the new frequency band B. Therefore, it needs to trigger the transmission of the SSB of the new frequency band B during the random access process. The triggering signaling is indicated by the MIB, SIB1 / x, Msg2, or Msg4 in the SSB of frequency band A. The triggering signaling indicates the necessary information for the terminal to receive and detect the SSB in the new frequency band, such as the SSB's frequency point, time, pattern, period, and sequence. Synchronization is then acquired, which includes at least one or more of the following actions: scanning synchronization signal blocks, capturing physical cell identifiers, acquiring cell timing and frequency synchronization, decoding system information, or calibrating time or frequency drift. Specifically, the terminal performs the following steps:

[0095] The system receives an SSB (Secondary Subscriber Block) sent by the base station corresponding to frequency band A, which includes an SS (Secondary Subscriber Block) and a MIB (Middle Subscriber Block). Optionally, it receives an SSB sent by the base station corresponding to frequency band B, which is used to respond to a trigger in the MIB sent by the base station corresponding to frequency band A. It also receives the Physical Downlink Shared Channel (PHS) sent by the base station corresponding to frequency band A; receives SIB1 / x sent by the base station corresponding to frequency band A; optionally, it receives an SSB sent by the base station corresponding to frequency band B, which is used to respond to the SIB1 / x sent by the base station corresponding to frequency band A; sends message 1 to the base station corresponding to frequency band A; receives message 2 sent by the base station corresponding to frequency band A; optionally, it receives an SSB sent by the base station corresponding to frequency band B, which is used to respond to message 2 sent by the base station corresponding to frequency band A; sends message 3 to the base station corresponding to frequency band A; receives message 4 sent by the base station corresponding to frequency band A; optionally, it receives an SSB sent by the base station corresponding to frequency band B, which is used to respond to message 4 sent by the base station corresponding to frequency band A. to trigger in Msg4).

[0096] In some embodiments, the first signaling also instructs a first procedure.

[0097] In some embodiments, the first signaling also instructs the third node to have any one or a combination of at least two of the following: a synchronization signal block, measurement resources for a channel state information reference signal, a channel state information report, a probe reference signal, a configuration of a signal for measuring channel state information, and a configuration of a channel state information report.

[0098] In some embodiments, the method further includes: reporting the measurement of the synchronization signal block to the second node; the reception information of the synchronization signal block is carried in message 3 of the four-step random access procedure. Since the measurement of the synchronization signal block can reflect the channel environment information between the first node and the second node, reporting the measurement of the synchronization signal block can assist the second node in adjusting the first signaling based on the channel environment information, completing the transmission of the first signaling, and improving the reliability of the first signaling transmission.

[0099] In some embodiments, the received information of the synchronization signal block includes at least one of the following: the index of the synchronization signal block, and the measured value of the received power of the reference signal corresponding to the synchronization signal block.

[0100] In some embodiments, the synchronization signal block has the same quasi-co-address attributes as at least one of the following signals: the channel corresponding to message 4 of the four-step random access procedure, the demodulation reference signal of message 4 of the four-step random access procedure, the channel state information reference signal transmitted by the second node, and the synchronization signal block or channel state information reference signal transmitted by the third node. That is, the aforementioned channel / signal can use the synchronization signal block as a quasi-co-address reference source to complete the transmission.

[0101] In some embodiments, the method further includes: reporting prediction information to a second node; the prediction information is information about the channel state information reference signal resources that the second or third node predicts to be sent by the first node; the prediction information is carried in message 3 of the four-step random access procedure.

[0102] In some embodiments, the second node and the third node satisfy one of the following:

[0103] The second and third nodes are the primary and secondary cells, respectively.

[0104] The second and third nodes are different cells;

[0105] The second and third nodes correspond to different frequency bands under the same node;

[0106] The second and third nodes correspond to different portions of the bandwidth under the same node;

[0107] The second and third nodes correspond to different sub-bands under the same node.

[0108] In some embodiments, the prediction information is obtained by prediction based on the measurement of the synchronization signal block.

[0109] In some embodiments, the first node assumes that the received channel state information reference signal resource and the reported predicted channel state information reference signal resource have the same quasi-co-address attributes.

[0110] In some embodiments, the method further includes: receiving a system message; the system message includes information indicating at least one of the following:

[0111] Whether the quasi-co-address attribute of the demodulation reference signal in message 4 of the four-step random access procedure received by the first node is based on the quasi-co-address attribute corresponding to the synchronization signal block reported by the first node; accordingly, the first node can report the measurement of the synchronization signal block;

[0112] Whether the quasi-co-address attribute of the demodulation reference signal in message 4 of the four-step random access procedure received by the first node is based on the quasi-co-address attribute corresponding to the prediction information reported by the first node; the prediction information is the information of the channel state information reference signal resource predicted by the first node for the second node; accordingly, the first node can report the prediction information.

[0113] Whether the quasi-co-address attribute of the demodulation reference signal of message 4 received by the first node in the four-step random access procedure is based on the quasi-co-address attribute corresponding to the synchronization signal block associated with the random access channel;

[0114] Whether the quasi-co-address attribute of the demodulation reference signal of message 4 of the four-step random access procedure received by the first node is based on the quasi-co-address attribute corresponding to the demodulation reference signal of message 2 of the four-step random access procedure;

[0115] The question is whether the quasi-co-address attribute of the demodulation reference signal for message 4 of the four-step random access procedure received by the first node is the same as the historically assumed quasi-co-address attribute. Here, the historically assumed quasi-co-address attribute refers to the quasi-co-address attribute that the first node previously relied upon, such as the quasi-co-address attribute of the downlink signal or channel prior to message 4. The question here also concerns whether the quasi-co-address attribute is the same as the historically assumed quasi-co-address attribute, meaning whether the second node still uses the previously used quasi-co-address attribute when sending the demodulation reference signal.

[0116] Does the quasi-co-address attribute of the demodulation reference signal in message 4 of the four-step random access procedure received by the first node allow for change compared to the historically assumed quasi-co-address attribute?

[0117] In some embodiments, the type of information indicated in the system message is related to the type or capability of the first node. For example, if the first node has the capability to report the aforementioned prediction information, the system message may indicate whether the quasi-co-address attribute of the demodulation reference signal of message 4 in the four-step random access procedure received by the first node is based on the quasi-co-address attribute corresponding to the prediction information reported by the first node. For example, if the first node is a node with strong capabilities, the system message may include information types corresponding to the capabilities of the first node.

[0118] The communication method provided in this disclosure can be applied to... Figure 1 The second node 102 in the communication system shown. Figure 6 A flowchart illustrating another communication method is shown, such as... Figure 6 As shown, the communication method includes the following S601:

[0119] S601, Send the first signaling to the first node.

[0120] The first signaling instruction indicates that the acquisition of channel state information is triggered during the random access process of the first node or during the activation process of the secondary cell.

[0121] In some embodiments, the first signaling is carried in the first message;

[0122] The first message is at least one of the following:

[0123] Messages in the four-step random access procedure; Messages in the two-step random access procedure; System messages; Media access control control cells;

[0124] System messages include at least a main information block and / or a system information block.

[0125] In some embodiments, when the first message is at least one of message 4 of a four-step random access procedure, message B of a two-step random access procedure, or a system information block.

[0126] The first signaling is carried in the downlink control information of the first message; or, the first signaling is carried in the physical shared channel scheduled by the downlink control information of the first message.

[0127] In some embodiments, the first signaling includes at least one of the following: a triggering signaling for channel state information reporting, an indication of measurement resources for channel state information reference signals, a triggering signaling for probe reference signals, configuration information of signals for measuring channel state information, and configuration information for channel state information reporting.

[0128] In some embodiments, the measurement resources of the channel state information reference signal are determined based on a set of measurement resources and an index that identifies the measurement resources in the set of measurement resources; or, the measurement resources of the channel state information reference signal are determined based on indication information that indicates the measurement resources.

[0129] In some embodiments, the triggering signaling for a channel state information report includes at least one of the following: the triggering state of the channel state information, the type of the channel state information report, the format of the channel state information report, and the reporting resources for the channel state information report.

[0130] In some embodiments, the measurement resources of the channel state information reference signal are included in the triggering signaling of the channel state information report.

[0131] In some embodiments, there are one or more trigger states for channel state information reporting; each trigger state corresponds to a channel state information reporting configuration and a measurement resource for a channel state information reference signal; the channel state information reporting configuration includes at least one of a channel state information reporting type, a channel state information reporting format, and a channel state information reporting resource.

[0132] In some embodiments, the triggering signaling for the probe reference signal includes at least one of the following: probe reference signal resource set, probe reference signal resource indication, second probe reference signal resource indication, probe reference signal request, and probe reference signal offset.

[0133] In some embodiments, the first node has the capability to process compressed channel state information reports using artificial intelligence; the signaling that triggers the channel state information report is the signaling related to the processing of compressed channel state information reports using artificial intelligence.

[0134] In some embodiments, the signaling that triggers a channel state information report includes at least one of the following corresponding to the channel state information report: compression type, target channel state information, configuration of quantization codebook, whether a one-sided or two-sided model is used, index of the artificial intelligence model, whether a joint source channel for channel state information reporting is supported, and compression method of modulation and coding.

[0135] In some embodiments, the cyclic redundancy check of downlink control information is based on the temporary cell radio network temporary identifier corresponding to the first message or the radio network temporary identifier of message B scrambling.

[0136] In some embodiments, the method further includes: receiving capability information from a first node; the capability information indicates whether the first node has the capability to trigger channel state information acquisition during random access;

[0137] The capability information is carried in message 3; or, the capability information is carried in message A.

[0138] In some embodiments, capability information includes or is used to indicate at least one of the following for the first node: the number of antenna ports of the channel state information reference signal, the density of measurement resources of the channel state information reference signal, the type of the channel state information reference signal, the processing capability of the channel state information reference signal, the transmit antenna switching capability of the probe reference signal, the number of time-domain symbols corresponding to the probe reference signal, the bandwidth of the probe reference signal, the comb structure of the probe reference signal, and the ability to process compressed channel state information reports using artificial intelligence.

[0139] In some embodiments, the method further includes:

[0140] Send a system message; the system message includes a set of configuration information for obtaining channel state information, and the set of configuration information corresponds to the ability to obtain channel state information.

[0141] In some embodiments, the first signaling further instructs the first node to obtain configuration information corresponding to the capabilities of the first node from the configuration information set.

[0142] In some embodiments, the first signaling indicates that channel state information is acquired during the secondary cell activation process; the first signaling is carried in a media access control control cell for activating the secondary cell.

[0143] In some embodiments, the media access control control cell satisfies at least one of the following:

[0144] When a channel state information reference signal measurement is triggered, the media access control control cell indicates the index of the measurement resource for the channel state information reference signal, or the media access control control cell indicates the index of the measurement resource set and the index of the measurement resource for the channel state information reference signal determined in the measurement resource set;

[0145] When a channel state information report is triggered, the media access control control cell indicates the configuration index of the channel state information report, the index of the resource set for the channel state information report, and the index of the resource for determining the channel state information report in the resource set; or, when a channel state information report is triggered, the media access control control cell indicates the configuration index of the channel state information report and the index of the measurement resource of the channel state information reference signal; or, when a channel state information report is triggered, the media access control control cell indicates the subset corresponding to the enabled channel state information trigger state.

[0146] When the transmission of a probe reference signal is triggered, the Media Access Control (MAC) control cell indicates the index of the resource set of the probe reference signal and the index of the resource in the resource set that determines the probe reference signal, or the MAC control cell indicates the index of the resource of the probe reference signal.

[0147] In some embodiments, when a channel state information report is triggered, the media access control control cell enables a subset of the channel state information triggering state, and the subset of the channel state information triggering state, together with the channel state information request field in the downlink control information format, triggers the channel state information report.

[0148] In some embodiments, the first signaling indicates that the acquisition of channel state information is triggered in the case of a random access procedure at the first node and the existence of the first procedure;

[0149] The first process includes at least one of the processes of secondary cell activation, frequency band transfer, cell transfer, or partial bandwidth transfer.

[0150] The first signaling bearer is in any one or a combination of at least two of the following: the main information block, the system information block, message 2 in the random access procedure, and message 4 in the random access procedure.

[0151] In some embodiments, the first signaling also instructs a first procedure.

[0152] In some embodiments, the first signaling also instructs the third node to have any one or a combination of at least two of the following: a synchronization signal block, measurement resources for a channel state information reference signal, a channel state information report, a probe reference signal, a configuration of a signal for measuring channel state information, and a configuration of a channel state information report.

[0153] In some embodiments, the method further includes:

[0154] The measurement of the synchronization signal block reported by the first node is received; the received information of the synchronization signal block is carried in message 3 of the four-step random access procedure.

[0155] In some embodiments, the received information of the synchronization signal block includes at least one of the following:

[0156] The index of the synchronization signal block and the measured value of the reference signal received power corresponding to the synchronization signal block.

[0157] In some embodiments, the synchronization signal block has the same quasi-co-address attribute as at least one of the following signals: the channel corresponding to message 4 of the four-step random access procedure, the demodulation reference signal of message 4 of the four-step random access procedure, the channel state information reference signal sent by the second node, and the synchronization signal block or channel state information reference signal sent by the third node.

[0158] In some embodiments, the method further includes: receiving prediction information reported by a first node; the prediction information is information about the channel state information reference signal resources that the first node predicts for the second or third node to send; the prediction information is carried in message 3 of the four-step random access procedure.

[0159] In some embodiments, the second node and the third node satisfy one of the following:

[0160] The second and third nodes are the primary and secondary cells, respectively.

[0161] The second and third nodes are different cells;

[0162] The second and third nodes correspond to different frequency bands under the same node;

[0163] The second and third nodes correspond to different portions of the bandwidth under the same node;

[0164] The second and third nodes correspond to different sub-bands under the same node.

[0165] In some embodiments, the prediction information is obtained by prediction based on the measurement of the synchronization signal block.

[0166] In some embodiments, the first node assumes that the received channel state information reference signal resource and the reported predicted channel state information reference signal resource have the same quasi-co-address attributes.

[0167] In some embodiments, the method further includes: sending a system message; the system message includes information indicating at least one of the following:

[0168] Whether the quasi-co-address attribute of the demodulation reference signal of message 4 received by the first node in the four-step random access procedure is based on the quasi-co-address attribute corresponding to the synchronization signal block reported by the first node;

[0169] Whether the quasi-co-address attribute of the demodulation reference signal in message 4 of the four-step random access procedure received by the first node is based on the quasi-co-address attribute corresponding to the prediction information reported by the first node; the prediction information is the information of the channel state information reference signal resources sent by the second node as predicted by the first node.

[0170] Whether the quasi-co-address attribute of the demodulation reference signal of message 4 received by the first node in the four-step random access procedure is based on the quasi-co-address attribute corresponding to the synchronization signal block associated with the random access channel;

[0171] Whether the quasi-co-address attribute of the demodulation reference signal of message 4 of the four-step random access procedure received by the first node is based on the quasi-co-address attribute corresponding to the demodulation reference signal of message 2 of the four-step random access procedure;

[0172] Does the quasi-co-address attribute of the demodulation reference signal of message 4 received by the first node in the four-step random access procedure have the same quasi-co-address attribute as historically assumed?

[0173] Does the quasi-co-address attribute of the demodulation reference signal in message 4 of the four-step random access procedure received by the first node allow for change compared to the historically assumed quasi-co-address attribute?

[0174] In some embodiments, the type of information indicated in the system message is related to the type or capability of the first node.

[0175] It should be noted that it is applied to Figure 1 The explanation of an embodiment of the communication method of the second node 102 in the communication system shown can be found in the following reference. Figure 1 Explanation of an embodiment of the communication method of the first node 101 in the communication system shown.

[0176] The following are exemplary descriptions provided by embodiments of this disclosure:

[0177] Assume the first node is a terminal and the second node is a base station, or the second node and the third node satisfy one of the following: they are the primary cell and the secondary cell, respectively; they are different cells; they correspond to different frequency bands under the same node; they correspond to different portions of the bandwidth under the same node; they correspond to different sub-bands under the same node.

[0178] Example 1: Channel state information acquisition is triggered during random access.

[0179] Example 1-1: Msg4 (Message 4) triggered signaling design.

[0180] A terminal capable of responding to channel state information acquisition signaling during random access is an enhanced terminal. To maintain backward compatibility in network access, this type of terminal needs to report its capability to the network device, i.e., the base station, during random access in order to receive downlink signaling adapted to its own capabilities. Capability reporting during random access can be identified by the base station via PRACH (Msg1) to send resource partitions, or it can be reported in the Msg3 signaling payload. In both methods, the base station acquires the capability before the Msg4 signaling is triggered and then sends an enhanced Msg4 adapted to the terminal's capabilities. The capability mentioned must at least include whether the terminal has the ability to respond to channel state information acquisition signaling during random access, such as using a 1-bit Boolean value for capability reporting. Besides whether it supports this capability, capability reporting may also include more detailed capability reporting, which will be described in subsequent specific examples.

[0181] During random access, in response to the Msg3 PUSCH scheduled by the uplink RAR, an enhanced terminal attempts to detect the downlink control information format (DCIformat) 1_1. The CRC of this format is scrambled by the corresponding TC-RNTI, which is generated during the random access process. A PDSCH carrying this downlink control information format is scheduled, containing an identifier for the terminal to resolve collisions, thus completing the entire random access process. This downlink control information format, or its scheduled PDSCH, indicates the signaling that triggers CSI reporting, CSI-RS measurement, or SRS transmission. This downlink control information format, or its scheduled PDSCH, is considered a component of the enhanced Msg4, which triggers channel state information acquisition during random access. It should be noted that the index 1_1 of this downlink control information format is merely a marker and can be replaced by other indices, such as DCI format X_Y, where X and Y are positive integers, to achieve the same function.

[0182] One possible trigger signaling is carried by the PDSCH scheduled in Msg4, including trigger instructions for CSI reports, measurement resources for CSI-RS, and transmission resources for SRS.

[0183] One possible triggering signaling is carried in the downlink control information format of Msg4, which includes triggering instructions for CSI reporting, measurement resources for CSI-RS, and transmission resources for SRS.

[0184] A similar possible triggering signaling is carried by both the downlink control information format in Msg4 and its scheduled PDSCH.

[0185] When the trigger signaling load is high, due to the limited load capacity of the downlink control information format or the PDSCH scheduling it has, a portion of the trigger signaling or the auxiliary information required for the trigger signaling can be decomposed into the downlink signaling configuration or indication before Msg4. The downlink signaling before Msg4 may include system message configuration signaling such as MIB or SIB1 / x, which is obtained from the base station before the terminal initiates the transmission of Msg1 or Msg3.

[0186] The Msg4 carries information indicating the trigger for obtaining channel state information. It is mainly used for the conventional four-step random access procedure, as well as scenarios where the two-step random access procedure is back to the four-step random access procedure.

[0187] In the two-step random access process, the information indicating the triggering of channel state information acquisition is carried by the MsgB. Specifically, when the MsgB contains a success RAR (successRAR) message, it can indicate signaling to trigger SRS transmission, CSI-RS measurement, or CSI measurement reporting. Similarly, in the two-step random access process, in response to the MsgA (PRACH and associated PUSCH, requiring the PUSCH to have available time-frequency resources), an enhanced terminal attempts to detect the downlink control information format (DCIformat)1_1. The CRC of this format is scrambled by the corresponding MsgB-RNTI, which is generated during the random access process. A PDSCH is scheduled carrying this downlink control information format. This downlink control information format or its scheduled PDSCH indicates signaling to trigger CSI reporting, CSI-RS measurement, or SRS transmission. This downlink control information format or its scheduled PDSCH is considered a component of the enhanced MsgB that completes the function of triggering channel state information acquisition during the random access process. It should be noted that the index 1_1 of this downlink control information format is just a marker and can be completely replaced by other indices, such as DCI format X_Y, where X and Y are positive integers, to accomplish the same function.

[0188] When MsgB contains a FallbackRAR message, the signaling signaling that triggers the acquisition of channel state information is postponed to be carried in Msg4 during the fallback process.

[0189] Furthermore, if the enhanced terminal's reporting capability is not effectively acquired by the base station, the base station may still send downlink control information format 1_0 instead of downlink control information format 1_1. In this case, the terminal needs to detect downlink control information format 1_0 at the same time as detecting downlink control information format 1_1; or if downlink control information format 1_1 is not detected within the Msg4 or MsgB reception time window, it should fall back to the mode of detecting downlink control information format 1_0.

[0190] Example 1-2: CSI report or CSI-RS measurement trigger.

[0191] Since a base station must first trigger a CSI-RS measurement to obtain the measurement results before it can report a valid CSI, triggering a CSI report can be considered a prerequisite for triggering a CSI-RS measurement. In some cases, the indication for triggering a CSI report includes the indication for triggering a CSI-RS measurement. Therefore, the triggering of CSI reports and CSI-RS measurements are described separately in the same example.

[0192] To trigger CSI-RS measurements (this section only describes triggering CSI-RS measurements, not triggering subsequent CSI reports), the base station needs to configure or instruct the terminal on the relevant CSI-RS resources available for measurement. CSI-RS resources can be directly indicated by the base station to the terminal, with the indication signaling carried by Msg4 or MsgB, specifically by the downlink control information format of Msg4 or MsgB or its scheduled PDSCH. CSI-RS resources can also be indirectly indicated by the base station to the terminal through a two-level signaling approach. The first-level signaling provides the configuration of the CSI-RS resource set, where a resource set contains multiple resources; the second-level signaling indicates the index of the resources available for measurement within the resource set. Both levels of signaling can be carried by Msg4 or MsgB, similar to the direct signaling indication method, specifically by the downlink control information format of Msg4 or MsgB or its scheduled PDSCH. The two levels of signaling can also be indicated by system messages such as MIB or SIB1 / x preceding Msg4 / MsgB, and by Msg4 / MsgB itself. For example, the first level of signaling can be indicated by system messages such as MIB or SIB1 / x, and the second level of signaling by Msg4 / MsgB. Since the first level of signaling is configured by system messages such as MIB or SIB1 / x, and the second level of signaling is indicated by Msg4 / MsgB, naturally, the first level of signaling precedes the second level of signaling.

[0193] To trigger a CSI report, a CSI-RS measurement can be triggered first, as described above. Then, the CSI report can be triggered. In this segmented triggering method, the two triggering signaling instructions are independently sent to the terminal. The instructions for triggering the CSI-RS measurement are as described above and will not be repeated. Triggering a CSI report can use downlink control information format or the CSI request field carried in the PDSCH. This field can directly indicate CSI report-related information, such as report type, format, and report resources, using the CSI report configuration (CSI-ReportConfig) signaling element; or it can point to an index of CSI-ReportConfig, while the specific configuration of CSI-ReportConfig is indicated by system messages such as MIB or SIB1 / x.

[0194] To trigger a CSI report, CSI-RS measurement and CSI reporting can be triggered simultaneously within a single signaling setup. This simultaneous triggering of CSI-RS measurement and CSI reporting can utilize an embedded downlink control information format or a CSI request field carried within the PDSCH. This CSI request field differs slightly in meaning from the terminology in the previous paragraph, requiring the addition of a CSI-RS measurement indication. When using a direct indication method, the request field must at least indicate the available CSI-RS resources for measurement and CSI report-related information, such as report type, format, and report resources. This can be achieved using the CSI report configuration signaling element CSI-ReportConfig, similar to the behavior in the previous two paragraphs. When using a two- or multi-level indirect indication method, the request field must at least indicate the resource index of the available CSI-RS resources in the measurement resource set and the index of the CSI report signaling element CSI-ReportConfig. The specific configuration of the measurement resource set and CSI-ReportConfig is indicated by system messages such as MIB or SIB1 / x prior to the indication trigger. A more specific example is that request fields in two- or multi-level indication signaling are mapped to a CSI aperiodic trigger state list (CSI-AperiodicTriggerStateList) indicated by system messages. Each trigger state (TriggerState) is associated with a set of CSI report configurations (CSI-ReportConfig) and corresponding CSI resource configurations (CSI-ResourceConfig). The mapping behavior refers to indicating the index of a list element in the trigger state list, i.e., the index of the trigger state. A trigger state index corresponds to a set of CSI report configuration (CSI-ReportConfig) indices and corresponding CSI resource configuration (CSI-ResourceConfig) indices.

[0195] The terminal can send a CSI report via a PUCCH following Msg4 / MsgB, with the PUCCH resource indicated by Msg4 / MsgB. Alternatively, the CSI report can be carried by a PUSCH following Msg4 / MsgB, with the PUSCH resource scheduling signaling indicated by the downlink control information format following Msg4 / MsgB.

[0196] Preferably, under FDD standard, the CSI report type is aperiodic wideband CSI Single-Panel codebook; under TDD standard, it is a PMI-free CSI report.

[0197] Example 1-3: SRS transmission trigger.

[0198] To trigger the terminal to send SRS, the indication signaling for triggering SRS transmission can be carried by downlink control information format or PDSCH. The relevant fields for triggering SRS transmission indicate at least one or more of the following information: SRS resource set indicator, SRS resource indicator, second SRS resource indicator, SRS request (dynamically instructing the UE to trigger the reporting of aperiodic or semi-persistent SRS resource sets), or SRS offset indicator (specifying the starting timeslot offset of SRS transmission relative to the timeslot where the DCI is located), etc.

[0199] The signaling signaling that triggers SRS transmission can be directly sent from the base station to the terminal. This signaling is carried by Msg4 or MsgB, specifically by the downlink control information format of Msg4 or MsgB or its scheduled PDSCH. Alternatively, related signaling can be indirectly sent from the base station to the terminal via a two-level signaling approach. For example, the first-level signaling provides an SRS resource set containing multiple resources; the second-level signaling indicates the index of the SRS resources available for transmission within the resource set. Both levels of signaling can be carried by Msg4 or MsgB, specifically by the downlink control information format of Msg4 or MsgB or its scheduled PDSCH. The two levels of signaling can also be indicated separately by system messages such as MIB or SIB1 / x preceding Msg4 / MsgB, and by Msg4 / MsgB itself. For example, the first-level signaling might be indicated by system messages such as MIB or SIB1 / x, and the second-level signaling by Msg4 / MsgB. Since the first-level signaling is configured by system messages such as MIB or SIB1 / x, and the second-level signaling is indicated by Msg4 / MsgB, naturally, the first-level signaling is indicated before the second-level signaling.

[0200] Example 1-4: Terminal capability reporting.

[0201] Terminals have different levels of CSI-RS measurement capabilities, which may vary in the number of antenna ports, measurement resource density, measurement type, and CPU (CSI process unit) processing power.

[0202] Supported antenna port counts include, but are not limited to, the following capabilities: support for 1 / 2 / 4 / 8 / 12 / 16 / 24 / 32 ports, etc.

[0203] Support for measuring resource density includes, but is not limited to, supporting the configuration of 1 or 3 CSI-RS REs per PRB.

[0204] Supported measurement types include, but are not limited to, support for periodic measurements, semi-continuous measurements, and non-periodic measurements. It should be noted that because this CSI-RS measurement is triggered during random access and is a one-time measurement indication, the terminal must have non-periodic measurement capabilities.

[0205] Supported CPU processing capabilities include, but are not limited to, the upper limit of parallel processing and different processing latencies.

[0206] Within the same cell, there may be multiple terminals with different capability levels. The base station needs to broadcast relevant CSI-RS measurement configuration information, such as CSI-RS resource sets, to all terminals of all capability levels via RRC signaling (MIB or SIB1 / x system messages, etc.). When the base station receives various capabilities reported by the terminal via Msg3, such as the number of antenna ports, measurement resource density, measurement type, and CPU processing power, it selects the appropriate information to trigger CSI-RS measurement based on the terminal's available capabilities. For example, based on the number of antenna ports, measurement resource density, measurement type, and CPU processing power, it indicates in Msg4 / MsgB information that the CSI-RS resources suitable for / matching the terminal's capability level. The higher the number of supported measurement ports, the more CSI-RS resources are required.

[0207] Similarly, since CSI reports are based on CSI-RS measurements, the terminal capabilities related to CSI reports are basically similar to those measured by CSI-RS, including different supported antenna port numbers, measurement resource densities, measurement types, CPU processing capabilities, etc. Capability reporting is still preferably done via Msg3 signaling. Within the same cell, there are multiple terminals that may have different capability levels. The base station needs to broadcast relevant CSI report configuration information to all terminals of all capability levels via RRC signaling (MIB or SIB1 / x system messages, etc.). When the base station receives the various CSI reporting capabilities reported by a terminal via Msg3, it selects the appropriate information to trigger a CSI report based on the terminal's available capabilities. For example, based on the number of antenna ports, measurement resource density, measurement type, and CPU processing capabilities, it indicates in Msg4 / MsgB the appropriate / matching CSI report type, format, and report resources for the terminal's capability level.

[0208] Furthermore, when the terminal possesses certain AI processing capabilities, such as the ability to compress CSI report information through AI processing, this capability can be explicitly reported via Msg3 signaling or implicitly via Msg1 partition resources. Msg4 / MsgB can then instruct on appropriate / matching signaling related to CSI report information compression that is suitable for / matches the terminal's AI processing capabilities. This includes, but is not limited to, CSI report compression type (spatial compression, frequency compression, time compression, or hybrid spatial-temporal-frequency compression), target CSI, quantization codebook configuration (scalar / vector quantization configuration), whether to use a one-sided or two-sided model, or AI model index (which can distinguish AI model structure, parameters, dataset, and applicable scenarios), and can even indicate whether the joint source channel and modulation coding compression method of the CSI report is supported.

[0209] Terminals have different levels of SRS transmission capabilities, which may vary in antenna switching capability, number of time-domain symbols supported, bandwidth support capability, and comb structure support capability.

[0210] Antenna switching capabilities include, but are not limited to, the following: 1T2R, 1T4R, 1T8R, 2T2R, 2T4R or 2T8R, etc. Here, T represents the supported transmit antenna and R represents the supported receive antenna. For example, 1T2R means that one transmit antenna corresponds to two receive antennas, and two SRS resources are needed to achieve switching transmission.

[0211] Support for the number of time-domain symbols includes, but is not limited to, supporting the transmission of SRS with 1, 2, or 4 time-domain symbols.

[0212] Supported bandwidth capabilities include, but are not limited to, 4, 8, 12, 16, 20, 24, 28, and 32, with a maximum bandwidth not exceeding 272 RB.

[0213] Supported combo structure capabilities include, but are not limited to, support for Comb-2 (alternating 1 subcarrier), Comb-4 (alternating 3 subcarriers), Comb-8 (alternating 7 subcarriers), or Comb-16 (alternating 15 subcarriers).

[0214] Within the same cell, there may be multiple terminals with different capability levels. The base station needs to broadcast relevant SRS configuration information, such as SRS resource sets, to all terminals of all capability levels via RRC signaling (MIB or SIB1 / x system messages, etc.). When the base station receives various capabilities reported by the terminal via Msg3, such as antenna switching capability, supported time-domain symbol quantity capability, supported bandwidth capability, and supported combinatorial capability, it selects the appropriate indication to trigger SRS transmission information based on the available capabilities of the terminal. For example, based on the terminal's supported antenna switching capability, supported time-domain symbol quantity capability, supported bandwidth capability, and supported combinatorial capability, it indicates the appropriate SRS resources in Msg4 / MsgB. The higher the transmit / receive ratio, the more SRS resources are required.

[0215] Regardless of the method of acquiring information status information, when a terminal receives a trigger signaling indication from Msg4, it is preferred to report it via Msg3. When a terminal receives a trigger signaling indication from MsgB, it is preferred to report it implicitly via the resource partition of PRACH.

[0216] Example 1-5: Prediction of CSI-RS resources.

[0217] During random access, the primary purpose of triggering CSI reports or CSI-RS measurements via Msg4 / MsgB indications is to expedite the understanding of channel state information before entering the connected state, thereby reducing latency in subsequent service initiation. Whether the CSI-RS resources indicated by Msg4 / MsgB are suitable for terminal measurement is a key factor affecting latency. When the spatial filtering information of the configured CSI-RS resources does not match the terminal's channel conditions, measuring and reporting the CSI using this CSI-RS may not contribute to quickly establishing a subsequent service transmission channel.

[0218] The terminal can choose to report the reception status of previously measured SSBs in Msg3, including but not limited to one or more SSB indices with better reception quality (RSRP value). If necessary, it can also report the RSRP measurement value for the corresponding SSB index. After receiving the relevant SSB index or corresponding RSRP measurement value, the base station can determine a suitable CSI-RS resource based on quasi-co-location properties (QCL), configure and send this CSI-RS, and the base station needs to indicate this CSI-RS resource via Msg4. Alternatively, the base station can use a pre-trained artificial intelligence model to perform model inference based on the relevant SSB index or corresponding RSRP measurement value, output the CSI-RS resource, and have it indicated by Msg4. The terminal assumes that the DMRS of Msg4PDCCH or PDSCH has the same quasi-co-location (QCL) properties as the reported SSB. Identical quasi-co-location (QCL) relationships are equivalent to consistent spatial filtering.

[0219] If the AI ​​model processing unit is located on the terminal side, the terminal can perform model inference based on the measurement results of one or more measurable SSBs, using a pre-trained AI model to output a CSI-RS resource index, which is then reported to the base station via Msg3. When receiving subsequent Msg4, the terminal can assume that the DMRS of the Msg4 PDCCH or PDSCH has the same QCL attribute as the reported CSI-RS resource index. Correspondingly, the base station needs to configure the QCL attribute or spatial filtering of Msg4 before the terminal receives it, based on the reported CSI-RS resource index. Furthermore, the terminal needs to assume that the received CSI-RS used for measurement has the same quasi-co-location (QCL) attribute as the reported predicted CSI-RS resources. Prediction can be based on terminal-side AI model inference. For example, ... Figure 7The diagram illustrates the reasoning process of an artificial intelligence model on the terminal side according to an embodiment of this disclosure. It shows the process by which the artificial intelligence model (referred to as the Channel State Information Reference Signal Model in the diagram) predicts the CSI-RS resource index from SSB measurements. The input to the artificial intelligence model is one or more SSB measurement results, including at least the SSB index and, optionally, the RSRP of the SSB. The output is one or more CSI-RS resource indices.

[0220] For example, such as Figure 8 The diagram shown is an internal structure diagram of a model for CSI-RS resource prediction provided in an embodiment of this disclosure, consisting of three ResNet layers and four Convolutional (Conv) layers.

[0221] Example 1-6: Switching the QCL properties of Msg2 and Msg4.

[0222] When the terminal reports the SSB measurement result or the CSI-RS resource index predicted by the artificial intelligence model in Msg3, there may be a mismatch or inconsistency between the reported result and the QCL attribute or spatial filtering based on the previous base station's transmission of Msg2. Normally, before transmitting the random access signal Msg1, the terminal selects an SSB index based on the measured SSB result and, based on channel reciprocity, selects an uplink spatial filter reciprocal with this SSB for transmitting Msg1. Subsequently, when receiving Msg2 and Msg4, the terminal assumes that the DMRS of the received PDCCH or PDSCH has the same QCL attribute as the initially selected SSB index, i.e., the same spatial filtering. However, since the enhanced terminal can report SSB measurement results or CSI-RS resource indexes inferred by the artificial intelligence model in Msg3, when the SSB index in the reported SSB measurement does not match the initially selected SSB index, or when the reported CSI-RS resource index and the initially selected SSB index do not have the same QCL attribute, there is a possibility that the QCL attribute expected by the terminal in Msg4 may not match or be misaligned with the initially selected QCL attribute. To guide the terminal and the base station to have a common understanding, the base station can configure or instruct the terminal, during random access, especially after Msg3 reports the SSB index or CSI-RS resource index, whether to assume that the QCL attribute of DMRS is based on the QCL attribute of the SSB / CSI-RS resource index reported in Msg3, or to keep the QCL attribute corresponding to the initially selected SSB index unchanged. Keeping the attribute unchanged is equivalent to continuing to use the QCL attribute of Msg2. This configuration or indication can be found in the MIB or SIB1 / x system message. A 1-bit Boolean value indicates whether the terminal assumes Msg4, specifically its DMRS QCL attribute is based on the SSB index or CSI-RS resource index reported in Msg3, or whether it remains unchanged, equivalent to the QCL attribute based on Msg2. For example, if the terminal selects the PRACH resource mapped to SSB1 before initiating random access Msg1, but reports an index of SSB3 in Msg3, the terminal will assume Msg4 based on the 1-bit configuration in the MIB or SIB1 / x system message, specifically whether its DMRS QCL attribute is based on SSB3 reported in Msg3, or whether it remains unchanged and continues to use SSB1. In other words, it determines whether the QCL attribute of Msg4 is allowed to switch based on the report in Msg3. It should be noted that the QCL attributes of the SSB index or CSI-RS resource index reported by Msg3 are allowed to be the same as the QCL attributes of the SSB index or Msg2 initially selected by the terminal. In this case, the indication of this Boolean value can be ignored by the terminal. The term "attribute" in QCL mentioned in this invention can also be equivalent to property, characteristic, feature, etc.

[0223] In summary: From the terminal's perspective, the terminal receives system message configuration information that indicates whether the QCL attribute of the DMRS is assumed to be based on the QCL attribute corresponding to the SSB / CSI-RS resource reported by Msg3 when receiving Msg4; or whether the configuration information indicates whether the QCL attribute of the DMRS is assumed to be based on the SSB used to associate PRACH occasion when receiving Msg4; or whether the configuration information indicates whether the QCL attribute of the DMRS is assumed to be based on the QCL attribute of the DMRS assumed when receiving Msg2; or whether the configuration information indicates whether the QCL attribute of the DMRS is assumed to be unchanged from the QCL attribute of the DMRS assumed in the previous process when receiving Msg4; or whether the configuration information indicates whether the QCL attribute of the DMRS is allowed to change from the QCL attribute of the DMRS assumed in the previous process when receiving Msg4.

[0224] The configuration or indication in the MIB or SIB1 / x system message can specify one of the five possible configuration directions mentioned in the previous paragraph of the Msg4 QCL attribute, based on the terminal type or terminal capability classification. For example, for mobile internet type terminals, because the terminal may be mobile and the QCL attribute may change, the configuration or indication of the Msg4 QCL attribute for this type of terminal is based on the SSB index or CSI-RS resource index reported by Msg3. For large-scale IoT terminals, since the terminals have basically no mobility requirements, the configuration or indication of the Msg4 QCL attribute for this type of terminal is based on the QCL attribute inherited from Msg2. If the terminal type reporting is based on the resource partition of Msg1, it is equivalent to the resource sent by Msg1 determining whether the QCL attribute of Msg4 is based on the SSB index or CSI-RS resource index reported by Msg3, or whether it still inherits the QCL attribute of Msg2.

[0225] Example 2: Channel state information acquisition is triggered during the activation process of the secondary cell.

[0226] Triggering channel state information (CSS) acquisition during secondary cell activation, rather than after activation, can reduce the latency of CSS acquisition during the secondary cell activation process. CSS acquisition can be triggered simultaneously with the activation of a secondary cell in the MAC CE signaling during secondary cell activation, such as when the terminal sends an SRS signal, measures CSI-RS, or reports a CSI in the secondary cell.

[0227] For example, such as Figure 9The diagram shown is a typical structural diagram of a MAC CE that simultaneously performs secondary cell activation and triggers channel state information acquisition according to an embodiment of this disclosure. It includes secondary cell ID activation / deactivation status, CSI-RS resource set identifier, CSI-RS resource identifier, CSI report configuration identifier, CSI trigger state subset enable (Ti), SRS resource set identifier, and SRS resource identifier.

[0228] Here, Ci is the activation or deactivation status indicator of secondary cell index i. When Ci = 1, it indicates that secondary cell i should be activated; when Ci = 0, it indicates that secondary cell i should be deactivated. The secondary cell id in MAC CE is a required element.

[0229] The element that triggers the acquisition of channel state information (CSE) in the MAC CE is optional and is selected based on the type of CSE acquisition. The elements of the MAC CE mentioned in this example can also be understood as fields or domains of the MAC CE.

[0230] When a CSI-RS measurement is triggered, the MAC CE must contain either a CSI-RS resource set index and a CSI-RS resource index within the resource set, or only a CSI-RS resource index. When a secondary cell i is activated, it must contain at least one set of CSI-RS resource set index and a CSI-RS resource index within the resource set, or only one set of CSI-RS resource indexes. When multiple secondary cells are activated, the element order of the CSI-RS resource set index and the CSI-RS resource index within the resource set is associated with the order of the secondary cell index i.

[0231] When a CSI report is triggered, the MAC CE must include one of two elements. The first option is to include a CSI report configuration index, which indicates a CSI report configuration. However, this requires both a CSI-RS resource set index associated with the configuration index and a CSI-RS resource index within the resource set, or it must include a CSI-RS resource index. This is because the CSI report configuration index does not configure related measurement resources. The number of CSI report configuration index elements is related to the number of secondary cells activated. The second option is to enable a subset of CSI trigger states and combine this with the CSI request field of the DCI in the downlink control information format to indicate triggering. The RRC signaling pre-configures a set of CSI trigger states. Tj in the MAC CE selects a subset of this set. When Tj = 1, state j in the set is enabled; when Tj = 0, state j in the set is deenabled. All enabled states are sequentially combined and mapped to codepoints in the CSI request field of the DCI. The mapping code point is determined by the ordinal position of all trigger states where element Tj is 1. That is, the first non-periodic trigger state with element Tj of 1 is mapped to code point value 1, the second to code point value 2, and so on. The number of elements enabled in the subset of CSI trigger states is related to the number of secondary cells activated.

[0232] When SRS transmission is triggered, the MAC CE must contain an SRS resource set index and an SRS resource index within the resource set, or only an SRS resource index. When a secondary cell i is activated, it must contain at least one SRS resource set index and an SRS resource index within the resource set, or only one SRS resource index. When multiple secondary cells are activated, the element order of the SRS resource set index and the SRS resource index within the resource set is associated with the order of the secondary cell index i. Furthermore, the MAC CE may also contain at least one or more of the following information, such as: a second SRS resource indication, an SRS request, or an SRS offset indication, etc.

[0233] Example 3: Channel state information acquisition is triggered during random access procedures and concurrent secondary cell activation, frequency band transfer, cell transfer, or partial bandwidth (BWP) transfer.

[0234] During random access transitions from idle / inactive to active states, if secondary cell activation, frequency band transfer, cell transfer, or partial bandwidth (BWP) transfer occurs simultaneously, to reduce activation, handover, and transfer latency, it's necessary to consider acquiring channel state information triggered by secondary cell activation, frequency band transfer, cell transfer, or BWP transfer before the random access process is completed. An example of random access accompanied by frequency band transfer has already been provided in the overall approach. This example further provides instances of random access accompanied by secondary cell activation and random access accompanied by cell transfer, such as... Figure 10 , 11 As shown:

[0235] Figure 10 This is a schematic diagram illustrating the process of obtaining channel state information before secondary cell activation during random access, as provided in an embodiment of this disclosure.

[0236] Before the random process ends, signaling indicating secondary cell activation can be used during the access process, simultaneously triggering the acquisition of channel state information. Activating the secondary cell and triggering channel state information acquisition are indicated by MIB, SIB1 / x, Msg2, or Msg4 in the PCell's SSB. The triggering information indicates the necessary information for the terminal to receive and detect SSB / CSI-RS in the secondary cell, such as the SSB / CSI-RS frequency, time, pattern, period, and sequence. Similarly, SRS transmission and CSI reporting can also be indicated and triggered using the same signaling.

[0237] Specifically, the terminal can perform the following steps: receiving an SSB sent by the primary cell, the SSB including an SS and a MIB; optionally, receiving an SSB / CSI sent by the secondary cell, the SSB / CSI being used to reply / respond to the MIB sent by the primary cell (SSB / CSI responding to MIB); receiving a physical downlink control channel sent by the primary cell; receiving SIB1 / x sent by the primary cell; optionally, receiving an SSB / CSI sent by the secondary cell, the SSB / CSI being used to reply / respond to the SIB1 / x sent by the primary cell (SSB / CSI responding to SIB1 / x); sending message 1 to the primary cell; receiving message 2 sent by the primary cell; optionally, receiving an SSB / CSI sent by the secondary cell, the SSB / CSI being used to reply / respond to message 2 sent by the primary cell (SSB / CSI responding to SIB1 / x); sending message 1 to the primary cell; receiving message 2 sent by the primary cell; optionally, receiving an SSB / CSI sent by the secondary cell, the SSB / CSI being used to reply / respond to message 2 sent by the primary cell (SSB / CSI responding to SIB1 / x). Msg2); Send message 3 to the primary cell; Receive message 4 sent by the primary cell; Optionally, receive SSB / CSI sent by the secondary cell, which is used to reply to / respond to message 4 sent by the primary cell (SSB / CSI responding to Msg4); After activation, send message 5 to the primary cell; Optionally, send SRS; Optionally, receive downlink control information sent by the primary cell, which is used to schedule the Physical Uplink Shared Channel (DCI Schedule PUSCH); Send CSI report on PUSCH on the Physical Uplink Shared Channel (CSIreport on PUSCH).

[0238] Similar to the CSI-RS prediction in Examples 1-5, during the random access process and secondary cell activation process, the optimal SSB / CSI-RS of the secondary cell SCell can be predicted from the SSB measurement results of the primary cell PCell, so as to obtain synchronization as soon as possible and speed up the secondary cell activation process.

[0239] The terminal can choose to report the reception status of previously measured SSBs in Msg3, including but not limited to one or more SSB indices with better reception quality (RSRP value). If necessary, it can also report the RSRP measurement value for the corresponding SSB index. After receiving the relevant SSB index or corresponding RSRP measurement value, the base station can determine the appropriate SSB / CSI-RS resources for the secondary cell based on quasi-co-location properties (QCL), configure and transmit them. The base station needs to indicate the SSB / CSI-RS resources of this secondary cell via Msg4. Alternatively, the base station can use a pre-trained artificial intelligence model to perform model inference based on the relevant SSB index or corresponding RSRP measurement value, output the SSB / CSI-RS resources of the secondary cell, and have Msg4 indicate these resources. The terminal assumes that the DMRS of the Msg4 PDCCH or PDSCH has the same quasi-co-location (QCL) attributes as the reported SSB. The difference from Example 1-5 is that the prediction input and output of Example 1-5 are for the same cell, while this example is for predicting the reference signal index of the secondary cell based on the measurement of the primary cell.

[0240] If the AI ​​model processing unit is located on the terminal side, the terminal can perform model inference based on the measurement results of one or more measurable SSBs, using a pre-trained AI model to output the SSB / CSI-RS resource index of the secondary cell, which is then reported by Msg3. When receiving SSB / CSI-RS resources from the secondary cell, the terminal can assume that the received SSB / CSI-RS and the reported SSB / CSI-RS resource index have the same QCL attribute. The base station should also configure itself to send SSB / CSI-RS in the secondary cell according to the reported SSB / CSI-RS resource index.

[0241] Figure 11 This is a schematic diagram illustrating a process for triggering channel state information acquisition before cell switching during random access, as provided in this embodiment of the disclosure. Similar to secondary cell activation, before the random process ends, signaling indicating cell switching is sent during access, simultaneously triggering the acquisition of channel state information. Cell switching and triggering channel state information acquisition are indicated by MIB, SIB1 / x, Msg2, or Msg4 in the SSB of Cell1. The triggering information indicates the necessary information for the terminal to receive and detect SSB / CSI-RS in Cell2, such as the frequency, time, pattern, period, and sequence of the SSB / CSI-RS. Similarly, SRS transmission and CSI reporting can also be indicated and triggered using the same signaling.

[0242] Specifically, the terminal can perform the following steps: receiving an SSB sent by cell 1, the SSB including SS and MIB; optionally, receiving an SSB / CSI sent by cell 2, the SSB / CSI being used to reply to / respond to the MIB sent by cell 1 (SSB / CSI responding to MIB); receiving a physical downlink control channel sent by cell 1; receiving SIB1 / x sent by cell 1; optionally, receiving an SSB / CSI sent by cell 2, the SSB / CSI being used to reply to / respond to the SIB1 / x sent by cell 1 (SSB / CSI responding to SIB1 / x); sending message 1 to cell 1; receiving message 2 sent by cell 1; optionally, receiving an SSB / CSI sent by cell 2, the SSB / CSI being used to reply to / respond to message 2 sent by cell 1 (SSB / CSI responding to SIB1 / x); sending message 1 to cell 1; receiving message 2 sent by cell 1; optionally, receiving an SSB / CSI sent by cell 2, the SSB / CSI being used to reply to / respond to message 2 sent by cell 1 (SSB / CSI responding to SIB1 / x). To Msg2); Send message 3 to cell 1; Receive message 4 sent by cell 1; Optionally, receive SSB / CSI sent by cell 2, which is used to reply to / respond to message 4 sent by cell 1 (SSB / CSI responding to Msg4); After activation, send message 5 to cell 1; Optionally, send SRS; Optionally, receive downlink control information sent by cell 1, which is used to schedule the physical uplink shared channel (DCI Schedule PUSCH); Send CSI report on PUSCH on the physical uplink shared channel (CSIreport on PUSCH).

[0243] In the random access and cell transfer process, the optimal SSB / CSI-RS of cell 2 can be predicted from the SSB measurement results of cell 1, facilitating faster synchronization and accelerating the secondary cell activation process. This prediction can be implemented using an artificial intelligence model, which can be located at either the base station or the terminal. If the prediction is located at the base station, the terminal reports the measured SSBs in Msg3, including but not limited to one or more SSB indices and their RSRP measurement values. If the prediction is located at the terminal, the terminal predicts and reports the SSB / CSI-RS resource index of the target cell in Msg3.

[0244] The scenario of random access and initiating partial bandwidth (BWP) transfer is similar to the frequency band transfer method. Similarly, artificial intelligence models can be used to predict SSB / CSI-RS at the base station or terminal.

[0245] The disclosed embodiments can divide the communication device into functional modules according to the above method embodiments. For example, each function can be divided into a separate functional module, or two or more functions can be integrated into one functional module. The integrated module can be implemented in hardware or software. It should be noted that the module division in this disclosed embodiment is illustrative and only represents one logical functional division. In actual implementation, there may be other division methods. The following description uses the example of dividing each functional module according to each function.

[0246] Figure 12 This is a schematic diagram of a communication device provided in an embodiment of this disclosure. The communication device can execute the communication method provided in the above-described method embodiments. Figure 12 As shown, the communication device includes: a receiving module 1201, a transmitting module 1202, and a processing module 1203.

[0247] The communication module is deployed on the first node.

[0248] The receiving module 1201 is used to receive a first signaling from the second node; the first signaling indicates that the acquisition of channel state information is triggered during the random access procedure or secondary cell activation procedure of the first node.

[0249] In some embodiments, the first signaling is carried in the first message;

[0250] The first message is at least one of the following:

[0251] Messages in the four-step random access procedure; Messages in the two-step random access procedure; System messages; Media access control control cells;

[0252] System messages include at least a main information block and / or a system information block.

[0253] In some embodiments, when the first message is at least one of message 4 of a four-step random access procedure, message B of a two-step random access procedure, or a system information block.

[0254] The first signaling is carried in the downlink control information of the first message; or,

[0255] The first signaling is carried in the physical shared channel of the downlink control information scheduling of the first message.

[0256] In some embodiments, the first signaling includes at least one of the following:

[0257] The triggering signaling for channel state information reporting, the indication information for measurement resources of channel state information reference signals, the triggering signaling for probe reference signals, the configuration information of signals for measuring channel state information, and the configuration information for channel state information reporting.

[0258] In some embodiments, the measurement resources of the channel state information reference signal are determined based on a set of measurement resources and an index that identifies the measurement resources within the set; or,

[0259] The measurement resources for the channel state information reference signal are determined based on the indication information indicating the measurement resources.

[0260] In some embodiments, the signaling that triggers a channel state information report includes at least one of the following:

[0261] The triggering state of channel state information, the type of channel state information report, the format of channel state information report, and the report resources for channel state information reports.

[0262] In some embodiments, the measurement resources of the channel state information reference signal are included in the triggering signaling of the channel state information report.

[0263] In some embodiments, one or more trigger states exist for channel state information reporting;

[0264] A trigger state corresponds to a channel state information report configuration and a channel state information reference signal measurement resource; the channel state information report configuration includes at least one of a channel state information report type, a channel state information report format, and a channel state information report report resource.

[0265] In some embodiments, the triggering signaling for probing the reference signal includes at least one of the following:

[0266] Detection reference signal resource set, detection reference signal resource indication, second detection reference signal resource indication, detection reference signal request, detection reference signal offset.

[0267] In some embodiments, the first node has the capability to process compressed channel state information reports using artificial intelligence; the signaling that triggers the channel state information report is the signaling related to the processing of compressed channel state information reports using artificial intelligence.

[0268] In some embodiments, the signaling that triggers a channel state information report includes at least one of the following:

[0269] Compression type, target channel state information, quantization codebook configuration, whether to use a one-sided or two-sided model, index of artificial intelligence model, whether to support joint source channel for channel state information reporting, and compression method of modulation and coding.

[0270] In some embodiments, the cyclic redundancy check of downlink control information is based on the temporary cell radio network temporary identifier corresponding to the first message or the radio network temporary identifier of message B scrambling.

[0271] In some embodiments, the sending module 1202 is configured to send capability information of the first node to the second node; the capability information indicates the first node's ability to trigger channel state information acquisition during random access.

[0272] The capability information is carried in message 3; or,

[0273] The capability information is carried in message A.

[0274] In some embodiments, capability information includes or is used to indicate at least one of the following for the first node:

[0275] The number of antenna ports of the channel state information reference signal, the density of measurement resources of the channel state information reference signal, the type of channel state information reference signal, the processing capability of the channel state information reference signal, the transmitting antenna switching capability of the probe reference signal, the number of time-domain symbols corresponding to the probe reference signal, the bandwidth of the probe reference signal, the comb structure of the probe reference signal, and the ability of artificial intelligence to process and compress channel state information reports.

[0276] In some embodiments, the receiving module 1201 is further configured to receive system messages; the system messages include a set of configuration information for acquiring channel state information, the set of configuration information corresponding to the capability to acquire channel state information.

[0277] In some embodiments, the first signaling further instructs the acquisition of configuration information corresponding to the capabilities of the first node from the configuration information set; the processing module 1203 is configured to acquire the configuration information corresponding to the capabilities of the first node from the configuration information set obtained from the channel state information based on the first signaling.

[0278] In some embodiments, the first signaling instruction triggers the acquisition of channel state information during the secondary cell activation process;

[0279] The first signaling is carried in the media access control control cell used to activate the secondary cell.

[0280] In some embodiments, the media access control control cell satisfies at least one of the following:

[0281] When a channel state information reference signal measurement is triggered, the media access control control cell indicates the index of the measurement resource for the channel state information reference signal, or the media access control control cell indicates the index of the measurement resource set and the index of the measurement resource for the channel state information reference signal determined in the measurement resource set;

[0282] When a channel state information report is triggered, the media access control control cell indicates the configuration index of the channel state information report, the index of the resource set for the channel state information report, and the index of the resource for determining the channel state information report in the resource set; or, when a channel state information report is triggered, the media access control control cell indicates the configuration index of the channel state information report and the index of the measurement resource of the channel state information reference signal; or, when a channel state information report is triggered, the media access control control cell indicates the subset corresponding to the enabled channel state information trigger state.

[0283] When the transmission of a probe reference signal is triggered, the Media Access Control (MAC) control cell indicates the index of the resource set of the probe reference signal and the index of the resource in the resource set that determines the probe reference signal, or the MAC control cell indicates the index of the resource of the probe reference signal.

[0284] In some embodiments, when a channel state information report is triggered, the media access control control cell enables a subset of the channel state information trigger states.

[0285] The subset of the channel state information triggering state, together with the channel state information request field in the downlink control information format, triggers the channel state information report.

[0286] In some embodiments,

[0287] The first signaling instruction indicates that the acquisition of channel state information is triggered in the case of a random access procedure at the first node and the existence of a first procedure;

[0288] The first process includes at least one of the processes of secondary cell activation, frequency band transfer, cell transfer, or partial bandwidth transfer.

[0289] The first signaling bearer is in any one or a combination of at least two of the following: the main information block, the system information block, message 2 in the random access procedure, and message 4 in the random access procedure.

[0290] In some embodiments, the first signaling also instructs a first procedure.

[0291] In some embodiments, the first signaling also instructs the third node to have any one or a combination of at least two of the following: a synchronization signal block, measurement resources for a channel state information reference signal, a channel state information report, a probe reference signal, a configuration of a signal for measuring channel state information, and a configuration of a channel state information report.

[0292] In some embodiments, the sending module 1202 is further configured to report the measurement of the synchronization signal block to the second node; the reception information of the synchronization signal block is carried in message 3 of the four-step random access procedure.

[0293] In some embodiments, the received information of the synchronization signal block includes at least one of the following:

[0294] The index of the synchronization signal block and the measured value of the reference signal received power corresponding to the synchronization signal block.

[0295] In some embodiments, the synchronization signal block has the same quasi-co-address attribute as at least one of the following signals: the channel corresponding to message 4 of the four-step random access procedure, the demodulation reference signal of message 4 of the four-step random access procedure, the channel state information reference signal sent by the second node, and the synchronization signal block or channel state information reference signal sent by the third node.

[0296] In some embodiments, the sending module 1202 is further configured to report prediction information to the second node; the prediction information is information about the channel state information reference signal resources that the second or third node predicts to be sent by the first node; the prediction information is carried in message 3 of the four-step random access procedure.

[0297] In some embodiments, the second node and the third node satisfy one of the following:

[0298] The second and third nodes are the primary and secondary cells, respectively.

[0299] The second and third nodes are different cells;

[0300] The second and third nodes correspond to different frequency bands under the same node;

[0301] The second and third nodes correspond to different portions of the bandwidth under the same node;

[0302] The second and third nodes correspond to different sub-bands under the same node.

[0303] In some embodiments, the prediction information is obtained by prediction based on the measurement of the synchronization signal block.

[0304] In some embodiments, the first node assumes that the received channel state information reference signal resource and the reported predicted channel state information reference signal resource have the same quasi-co-address attributes.

[0305] In some embodiments, the receiving module 1201 is further configured to receive a system message; the system message includes information indicating at least one of the following:

[0306] Whether the quasi-co-address attribute of the demodulation reference signal of message 4 received by the first node in the four-step random access procedure is based on the quasi-co-address attribute corresponding to the synchronization signal block reported by the first node;

[0307] Whether the quasi-co-address attribute of the demodulation reference signal in message 4 of the four-step random access procedure received by the first node is based on the quasi-co-address attribute corresponding to the prediction information reported by the first node; the prediction information is the information of the channel state information reference signal resources sent by the second node as predicted by the first node.

[0308] Whether the quasi-co-address attribute of the demodulation reference signal of message 4 received by the first node in the four-step random access procedure is based on the quasi-co-address attribute corresponding to the synchronization signal block associated with the random access channel;

[0309] Whether the quasi-co-address attribute of the demodulation reference signal of message 4 of the four-step random access procedure received by the first node is based on the quasi-co-address attribute corresponding to the demodulation reference signal of message 2 of the four-step random access procedure;

[0310] Does the quasi-co-address attribute of the demodulation reference signal of message 4 received by the first node in the four-step random access procedure have the same quasi-co-address attribute as historically assumed?

[0311] Does the quasi-co-address attribute of the demodulation reference signal in message 4 of the four-step random access procedure received by the first node allow for change compared to the historically assumed quasi-co-address attribute?

[0312] In some embodiments, the type of information indicated in the system message is related to the type or capability of the first node.

[0313] The communication device is deployed on the second node.

[0314] The sending module 1202 is used to send a first signaling to the first node; the first signaling indicates that the acquisition of channel state information is triggered during the random access process of the first node or during the activation process of the secondary cell.

[0315] In implementing the functionality of the integrated modules described above using hardware, this disclosure provides another possible structure for the communication device involved in the above embodiments. For example... Figure 13 As shown, the communication device includes a processor 1302 and a bus 1304. Optionally, the communication device may also include a memory 1301; alternatively, the communication device may also include a communication interface 1303.

[0316] Processor 1302 may implement or execute various exemplary logic blocks, modules, and circuits described in conjunction with embodiments of this disclosure. Processor 1302 may be a central processing unit, a general-purpose processor, a digital signal processor, an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It may implement or execute various exemplary logic blocks, modules, and circuits described in conjunction with embodiments of this disclosure. Processor 1302 may also be a combination of computing functions, such as including one or more microprocessor combinations, a combination of a DSP and a microprocessor, etc.

[0317] The communication interface 1303 is used to connect to other devices via a communication network. This communication network can be Ethernet, wireless access network, wireless local area network (WLAN), etc.

[0318] The memory 1301 may be a read-only memory (ROM) or other type of static storage device capable of storing static information and instructions, random access memory (RAM) or other type of dynamic storage device capable of storing information and instructions, or electrically erasable programmable read-only memory (EEPROM), disk storage medium or other magnetic storage device, or any other medium capable of carrying or storing desired program code in the form of instructions or data structures and accessible by a computer, but is not limited thereto.

[0319] As one possible implementation, the memory 1301 can exist independently of the processor 1302. The memory 1301 can be connected to the processor 1302 via a bus 1304 and is used to store instructions or program code. When the processor 1302 calls and executes the instructions or program code stored in the memory 1301, it can implement the method provided in the embodiments of this disclosure.

[0320] In another possible implementation, the memory 1301 can also be integrated with the processor 1302.

[0321] The 1304 bus can be an extended industry standard architecture (EISA) bus, etc. The 1304 bus can be divided into address bus, data bus, control bus, etc. For ease of representation, Figure 13 The bus is represented by a single thick line, but this does not mean that there is only one bus or one type of bus.

[0322] Some embodiments of this disclosure provide a computer-readable storage medium (e.g., a non-transitory computer-readable storage medium) storing computer program instructions that, when executed on a computer, cause the computer to perform the methods described in any of the above embodiments.

[0323] For example, the computer-readable storage media described above may include, but are not limited to: magnetic storage devices (e.g., hard disks, floppy disks, or magnetic tapes), optical disks (e.g., compact disks (CDs), digital versatile disks (DVDs), etc.), smart cards, and flash memory devices (e.g., erasable programmable read-only memory (EPROMs), cards, sticks, or key drives, etc.). The various computer-readable storage media described in this disclosure may represent one or more devices and / or other machine-readable storage media for storing information. The term "machine-readable storage medium" may include, but is not limited to, wireless channels and various other media capable of storing, containing, and / or carrying instructions and / or data.

[0324] This disclosure provides a computer program product containing instructions that, when run on a computer, cause the computer to perform the methods described in any of the above embodiments.

[0325] The above description is merely a specific embodiment of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any changes or substitutions within the technical scope disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A communication method, characterized in that, Applied to the first node, the method includes: Receive a first signaling from the second node; the first signaling indicates that channel state information acquisition is triggered during the random access procedure or secondary cell activation procedure of the first node.

2. The method according to claim 1, characterized in that, The first signaling is carried in the first message; The first message is at least one of the following: Messages in the four-step random access procedure; Messages in the two-step random access procedure; System messages; Media access control control cells; The system message includes at least a main information block and / or a system information block.

3. The method according to claim 1, characterized in that, The first signaling is carried in a first message, wherein the first message is a combination of at least one of the following: message 4 of a four-step random access procedure, message B of a two-step random access procedure, and a system information block. The first signaling is carried in the downlink control information of the first message; or, The first signaling is carried in the physical shared channel of the downlink control information scheduling of the first message.

4. The method according to claim 2, characterized in that, The first signaling includes at least one of the following: The triggering signaling for channel state information reporting, the indication information for measurement resources of channel state information reference signals, the triggering signaling for probe reference signals, the configuration information of signals for measuring channel state information, and the configuration information for channel state information reporting.

5. The method according to claim 4, characterized in that, The measurement resources of the channel state information reference signal are determined based on a set of measurement resources and an index in which the measurement resources are identified within that set; or, The measurement resources of the channel state information reference signal are determined based on indication information indicating the measurement resources.

6. The method according to claim 4, characterized in that, The triggering signaling for the channel state information report includes at least one of the following: The triggering state of the channel state information, the type of the channel state information report, the format of the channel state information report, and the report resources of the channel state information report.

7. The method according to claim 6, characterized in that, The measurement resources of the channel state information reference signal are included in the triggering signaling of the channel state information report.

8. The method according to claim 7, characterized in that, One or more trigger states exist for the channel state information report; A trigger state corresponds to a channel state information report configuration and a measurement resource for the channel state information reference signal; the channel state information report configuration includes at least one of a channel state information report type, a channel state information report format, and a channel state information report report resource.

9. The method according to claim 4, characterized in that, The triggering signaling for the detection reference signal includes at least one of the following: Detection reference signal resource set, detection reference signal resource indication, second detection reference signal resource indication, detection reference signal request, detection reference signal offset.

10. The method according to claim 4, characterized in that, The first node has the capability to process compressed channel state information reports using artificial intelligence; the triggering signaling for the channel state information report is the relevant signaling for processing compressed channel state information reports using artificial intelligence.

11. The method according to claim 10, characterized in that, The triggering signaling for the channel state information report includes at least one of the following: Compression type, target channel state information, quantization codebook configuration, whether to use a one-sided or two-sided model, index of artificial intelligence model, whether to support joint source channel for channel state information reporting, and compression method of modulation and coding.

12. The method according to claim 3, characterized in that, The cyclic redundancy check of the downlink control information is based on the temporary cell radio network temporary identifier corresponding to the first message or the radio network temporary identifier of message B, which is scrambled.

13. The method according to claim 2, characterized in that, The method further includes: Send the capability information of the first node to the second node; the capability information indicates the first node's ability to trigger channel state information acquisition during random access. The capability information is carried in message 3; or... The capability information is carried in message A.

14. The method according to claim 13, characterized in that, The capability information includes or is used to indicate at least one of the following for the first node: The number of antenna ports of the channel state information reference signal, the density of measurement resources of the channel state information reference signal, the type of channel state information reference signal, the processing capability of the channel state information reference signal, the transmitting antenna switching capability of the probe reference signal, the number of time-domain symbols corresponding to the probe reference signal, the bandwidth of the probe reference signal, the comb structure of the probe reference signal, and the ability of artificial intelligence to process and compress channel state information reports.

15. The method according to claim 1, characterized in that, The method further includes: Receive system messages; the system messages include a set of configuration information for acquiring channel state information, the set of configuration information corresponding to the capability to acquire the channel state information.

16. The method according to claim 15, characterized in that, The first signaling also instructs the retrieval of configuration information corresponding to the capabilities of the first node from the configuration information set; the method further includes: Based on the first signaling, configuration information corresponding to the capabilities of the first node is obtained from the set of configuration information obtained from the channel state information.

17. The method according to claim 1, characterized in that, The first signaling instruction indicates that channel state information is acquired during the secondary cell activation process; The first signaling is carried in a media access control control cell used to activate the secondary cell.

18. The method according to claim 17, characterized in that, The media access control control cell satisfies at least one of the following: When a channel state information reference signal measurement is triggered, the media access control control cell indicates the index of the measurement resource for the channel state information reference signal, or the media access control control cell indicates the index of the measurement resource set and the index of the measurement resource for the channel state information reference signal determined in the measurement resource set; When a channel state information report is triggered, the media access control control element indicates the configuration index of the channel state information report, the index of the resource set of the channel state information report, and the index of the resource in the resource set that determines the channel state information report; or, when a channel state information report is triggered, the media access control control element indicates the configuration index of the channel state information report and the index of the measurement resource of the channel state information reference signal; or, when a channel state information report is triggered, the media access control control element indicates the subset corresponding to the enabled channel state information trigger state. When the transmission of a probe reference signal is triggered, the media access control control cell indicates the index of the resource set of the probe reference signal and the index of the resource in the resource set that determines the probe reference signal, or the media access control control cell indicates the index of the resource of the probe reference signal.

19. The method according to claim 18, characterized in that, When a channel state information report is triggered, the media access control control cell enables the subset corresponding to the channel state information trigger state. The subset corresponding to the channel state information trigger state, together with the channel state information request field in the downlink control information format, triggers the channel state information report.

20. The method according to claim 1, characterized in that, The first signaling indicates that channel state information is triggered during the random access process of the first node and in the presence of a first process; The first process includes at least one of the following: secondary cell activation, frequency band transfer, cell transfer, or partial bandwidth transfer. The first signaling is carried in any one or a combination of at least two of the following: a master information block, a system information block, message 2 in the random access procedure, and message 4 in the random access procedure.

21. The method according to claim 20, characterized in that, The first signaling also instructs the first procedure.

22. The method according to claim 20, characterized in that, The first signaling also instructs the third node to have any one or at least a combination of the following: a synchronization signal block, measurement resources for channel state information reference signals, channel state information reports, a probe reference signal, a configuration of signals for measuring channel state information, and a configuration of channel state information reports.

23. The method according to claim 1, characterized in that, The method further includes: The measurement of the synchronization signal block is reported to the second node; the reception information of the synchronization signal block is carried in message 3 of the four-step random access procedure.

24. The method according to claim 23, characterized in that, The received information of the synchronization signal block includes at least one of the following: The index of the synchronization signal block and the measured value of the reference signal received power corresponding to the synchronization signal block.

25. The method according to claim 23, characterized in that, The synchronization signal block has the same quasi-co-address attribute as at least one of the following signals: the channel corresponding to message 4 of the four-step random access procedure, the demodulation reference signal of message 4 of the four-step random access procedure, the channel state information reference signal sent by the second node, and the synchronization signal block or channel state information reference signal sent by the third node.

26. The method according to claim 1, characterized in that, The method further includes: The prediction information is reported to the second node; the prediction information is the information of the channel state information reference signal resources sent by the second or third node as predicted by the first node; the prediction information is carried in message 3 of the four-step random access procedure.

27. The method according to any one of claims 22, 25, or 26, characterized in that, The second node and the third node satisfy one of the following: The second node and the third node are the primary cell and the secondary cell, respectively; The second node and the third node are different cells; The second node and the third node correspond to different frequency bands under the same node; The second node and the third node correspond to different portions of the bandwidth under the same node; The second node and the third node correspond to different sub-bands under the same node.

28. The method according to claim 26, characterized in that, The prediction information is obtained through prediction based on the measurement of the synchronization signal block.

29. The method according to claim 26, characterized in that, The first node assumes that the received channel state information reference signal resource and the reported predicted channel state information reference signal resource have the same quasi-co-address attribute.

30. The method according to claim 1, characterized in that, The method further includes: Receive system messages; the system messages include information indicating at least one of the following: Whether the quasi-co-address attribute of the demodulation reference signal of message 4 in the four-step random access procedure received by the first node is based on the quasi-co-address attribute corresponding to the synchronization signal block reported by the first node; Whether the quasi-co-address attribute of the demodulation reference signal of message 4 in the four-step random access procedure received by the first node is based on the quasi-co-address attribute corresponding to the prediction information reported by the first node; the prediction information is the information of the channel state information reference signal resource predicted by the first node for the second node to send; Whether the quasi-co-address attribute of the demodulation reference signal of message 4 in the four-step random access procedure received by the first node is based on the quasi-co-address attribute corresponding to the synchronization signal block associated with the random access channel; Whether the quasi-co-address attribute of the demodulation reference signal of message 4 of the four-step random access procedure received by the first node is based on the quasi-co-address attribute corresponding to the demodulation reference signal of message 2 of the four-step random access procedure; Whether the quasi-co-address attribute of the demodulation reference signal of message 4 in the four-step random access procedure received by the first node is the same as the historically assumed quasi-co-address attribute; Whether the quasi-co-address attribute of the demodulation reference signal of message 4 in the four-step random access procedure received by the first node is allowed to change compared with the historically assumed quasi-co-address attribute.

31. The method according to claim 30, characterized in that, The type of information indicated in the system message is related to the type or capability of the first node.

32. A communication method, characterized in that, Applied to the second node, the method includes: Send a first signaling message to the first node; the first signaling message indicates that the acquisition of channel state information is triggered during the random access process of the first node or during the activation process of the secondary cell.

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

34. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions that, when executed in a computer, cause the computer to perform the method as described in any one of claims 1-31, or to perform the method as described in claim 32.

35. A computer program product, characterized in that, The computer program product includes computing technology program instructions, which, when executed by a processor, implement the method as described in any one of claims 1-31, or perform the method as described in claim 32.

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