Information transmission method and device, related equipment, storage medium and computer program product

Abstract

The invention discloses an information transmission method and device, related equipment, a storage medium and a computer program product. The method comprises the following steps: determining a rank parameter of a channel by using first information sent by a terminal, and determining whether to start a first multiple-input multiple-output (MIMO) transmission mode; the first information comprises N pieces of second information, each piece of second information comprises third information and fourth information, the third information is used for indicating reference signal resources of a group of downlink receiving beams, the fourth information comprises signal quality related information and channel related information of the group of downlink receiving beams, and N is an integer greater than or equal to 1; in the first MIMO transmission mode, the terminal can switch beams in Q directions within a time period, and Q is an integer greater than or equal to 2.

Description

Technical Field

[0001] The present application relates to the field of wireless communications, and in particular to an information transmission method, apparatus, related equipment, storage medium, and computer program product. Background Art

[0002] Multiple-Input Multiple-Output (MIMO) technology is a key core technology in Long Term Evolution (LTE) and fifth-generation mobile communication (5G) systems. MIMO fully utilizes spatial resources, exponentially increasing system channel capacity and spectrum efficiency without increasing spectrum resources or antenna transmit power.

[0003] To meet the demand for higher system capacity in sixth-generation mobile communications (6G), a new type of MIMO system (also known as a virtual MIMO system) has been proposed. In this system, by changing the dimension of the transmission channel matrix, higher spatial multiplexing capabilities can be achieved in low-frequency bands (specifically, the Frequency Range (FR) 1 band), which is expected to significantly improve spectral efficiency.

[0004] However, in the scenario of applying the new MIMO system, there is currently no effective solution for how to accurately estimate the rank parameter of the channel and how to determine whether to enable the new MIMO transmission mode for MIMO transmission. Summary of the Invention

[0005] To solve related technical problems, the embodiments of the present application provide an information transmission method, apparatus, related equipment, storage medium and computer program product.

[0006] The technical solution of the embodiment of the present application is implemented as follows:

[0007] The present invention provides an information transmission method, which is applied to a network device and includes:

[0008] The first information sent by the terminal is used to determine the rank parameter of the channel and to determine whether to turn on the first MIMO transmission mode; the first information contains N second information, each second information contains third information and fourth information, the third information is used to indicate a reference signal resource of a group of downlink receiving beams, and the fourth information contains signal quality-related information and channel-related information of a group of downlink receiving beams, and N is an integer greater than or equal to 1; under the first MIMO transmission mode, the terminal can switch beams in Q directions within a time period, and Q is an integer greater than or equal to 2.

[0009] In the above solution, the signal quality related information and channel related information include signal strength and channel correlation measurement values;

[0010] The determining the rank parameter of the channel by using the first information sent by the terminal and determining whether to enable the first MIMO transmission mode includes:

[0011] Using the first information, determine one or more groups of downlink receive beams whose signal strengths meet a first threshold and whose channel correlation measurement values ​​meet a second threshold, and determine to enable the first MIMO transmission mode;

[0012] Selecting a group of downlink receive beams with the smallest channel correlation from the one or more groups of downlink receive beams;

[0013] Summing the rank parameters of each receiving beam direction in a selected set of downlink receiving beams to obtain the rank parameter of the channel;

[0014] The method further comprises:

[0015] Send fifth information to the terminal, where the fifth information is used to notify the terminal to enable the first MIMO transmission mode.

[0016] In the above solution, the signal quality related information and channel related information include signal strength and channel correlation measurement values;

[0017] The determining the rank parameter of the channel by using the first information sent by the terminal and determining whether to enable the first MIMO transmission mode includes:

[0018] Determining, using the first information, that channel correlation measurement values ​​of the N groups of receive beams do not meet a second threshold, and determining not to enable the first MIMO transmission mode;

[0019] Using the first information, select a group of downlink receiving beams from N groups of receiving beams whose signal strength meets the first threshold and whose channel correlation is minimized; use the minimum value of the rank parameters of the selected group of downlink receiving beam directions as the rank parameter of the channel; or use the minimum value of the rank parameters of the M reference signal resources configured by the network device for the terminal as the rank parameter of the channel, where M is an integer greater than or equal to 2.

[0020] In the above solution, the signal quality related information and channel related information include signal strength and channel information;

[0021] The determining the rank parameter of the channel by using the first information sent by the terminal and determining whether to enable the first MIMO transmission mode includes:

[0022] Determining channel correlation measurement values ​​for a set of downlink receive beams using the channel information;

[0023] Using the first information, determine one or more groups of downlink receive beams whose signal strengths meet a first threshold and whose channel correlation measurement values ​​meet a second threshold, and determine to enable the first MIMO transmission mode;

[0024] Selecting a group of downlink receive beams with the smallest channel correlation from the one or more groups of downlink receive beams;

[0025] Summing the rank parameters of each receiving beam direction in a selected set of downlink receiving beams to obtain the rank parameter of the channel;

[0026] The method further comprises:

[0027] Send fifth information to the terminal, where the fifth information is used to notify the terminal to enable the first MIMO transmission mode.

[0028] In the above solution, the signal quality related information and channel related information include signal strength and channel information;

[0029] The determining the rank parameter of the channel by using the first information sent by the terminal and determining whether to enable the first MIMO transmission mode includes:

[0030] Determining channel correlation measurement values ​​for a set of downlink receive beams using the channel information;

[0031] Determining, using the first information, that channel correlation measurement values ​​of the N groups of receive beams do not meet a second threshold, and determining not to enable the first MIMO transmission mode;

[0032] Using the first information, select a group of downlink receiving beams from N groups of receiving beams whose signal strength meets the first threshold and whose channel correlation is minimized; use the minimum value of the rank parameters of the selected group of downlink receiving beam directions as the rank parameter of the channel; or use the minimum value of the rank parameters of the M reference signals configured by the network device for the terminal as the rank parameter of the channel, where M is an integer greater than or equal to 2.

[0033] In the above solution, the method further includes:

[0034] Sending sixth information to the terminal, where the sixth information is used to instruct the terminal to estimate and send rank parameters respectively in a set of selected receive beam directions;

[0035] Receive seventh information sent by the terminal, where the seventh information includes rank parameters of a selected set of receive beam directions.

[0036] In the above solution, the method further includes:

[0037] Configuration information associated with M reference signals is sent to the terminal, where M is an integer greater than or equal to 2.

[0038] In the above solution, the method further includes:

[0039] Eighth information sent by the terminal is received, where the eighth information represents that the terminal can implement receiving beams in M ​​directions and can switch beams in Q directions within a time period.

[0040] The embodiment of the present application further provides an information transmission method, applied to a terminal, comprising:

[0041] Receive the fifth information sent by the network side, where the fifth information is used to notify the terminal to turn on the first MIMO transmission mode. Under the first MIMO transmission mode, the terminal can switch beams in Q directions within a time period, where Q is an integer greater than or equal to 2.

[0042] In the above solution, the method further includes:

[0043] Send first information to the network side, where the first information includes N second information, each second information includes third information and fourth information, the third information is used to indicate a reference signal resource of a group of downlink receive beams, and the fourth information includes signal quality-related information and channel-related information of a group of downlink receive beams, where N is an integer greater than or equal to 1.

[0044] In the above solution, the signal quality related information and channel related information include signal strength and channel correlation measurement values;

[0045] or,

[0046] The signal quality related information and channel related information include signal strength and channel information.

[0047] In the above solution, the method further includes:

[0048] receiving sixth information sent by the network side, where the sixth information is used to instruct the terminal to estimate and send rank parameters respectively in a set of receive beam directions;

[0049] Seventh information is sent to the network side, where the seventh information includes a rank parameter of an indicated set of receiving beam directions.

[0050] In the above solution, the method further includes:

[0051] receiving configuration information associated with M reference signals sent by the network side, where M is an integer greater than or equal to 2;

[0052] Using the configuration information, measurements associated with the first information are performed.

[0053] In the above solution, the method further includes:

[0054] Eighth information is sent to the network side, where the eighth information indicates that the terminal can realize receiving beams in M ​​directions and can switch beams in Q directions within a time period.

[0055] The present application also provides an information transmission device, including:

[0056] A determination unit is used to determine the rank parameter of the channel and determine whether to turn on the first MIMO transmission mode by using the first information sent by the terminal; the first information contains N second information, each second information contains third information and fourth information, the third information is used to indicate a reference signal resource of a group of downlink receiving beams, and the fourth information contains signal quality-related information and channel-related information of a group of downlink receiving beams, and N is an integer greater than or equal to 1; under the first MIMO transmission mode, the terminal can switch beams in Q directions within a time period, and Q is an integer greater than or equal to 2.

[0057] The present application also provides an information transmission device, including:

[0058] A receiving unit is used to receive the fifth information sent by the network side, where the fifth information is used to notify the terminal to turn on the first MIMO transmission mode. Under the first MIMO transmission mode, the terminal can switch beams in Q directions within a time period, where Q is an integer greater than or equal to 2.

[0059] The embodiment of the present application further provides a network device, comprising: a first processor and a first communication interface; wherein,

[0060] The first processor is used to determine the rank parameter of the channel and determine whether to turn on the first MIMO transmission mode by using the first information sent by the terminal; the first information contains N second information, each second information contains third information and fourth information, the third information is used to indicate a reference signal resource of a group of downlink receiving beams, and the fourth information contains signal quality-related information and channel-related information of a group of downlink receiving beams, and N is an integer greater than or equal to 1; under the first MIMO transmission mode, the terminal can switch beams in Q directions within a time period, and Q is an integer greater than or equal to 2.

[0061] The embodiment of the present application further provides a terminal, comprising: a second processor and a second communication interface; wherein,

[0062] The second communication interface is used to receive the fifth information sent by the network side, and the fifth information is used to notify the terminal to turn on the first MIMO transmission mode. In the first MIMO transmission mode, the terminal can switch beams in Q directions within a time period, and Q is an integer greater than or equal to 2.

[0063] An embodiment of the present application further provides a network device, comprising: a first processor and a first memory for storing a computer program that can be run on the processor,

[0064] Wherein, the first processor is used to execute the steps of any of the above-mentioned methods on the network device side when running the computer program.

[0065] An embodiment of the present application further provides a terminal, comprising: a second processor and a second memory for storing a computer program that can be run on the processor,

[0066] The second processor is configured to execute the steps of any of the above-mentioned terminal-side methods when running the computer program.

[0067] An embodiment of the present application also provides a storage medium on which a computer program is stored. When the computer program is executed by a processor, the computer program implements the steps of any of the above-mentioned methods on the network device side, or implements the steps of any of the above-mentioned methods on the terminal side.

[0068] An embodiment of the present application also provides a computer program product, including a computer program, which, when executed by a processor, implements the steps of any of the above-mentioned methods on the network device side, or implements the steps of any of the above-mentioned methods on the terminal side.

[0069] The information transmission method, apparatus, related equipment, storage medium, and computer program product provided in the embodiments of the present application are as follows: a network device uses first information sent by a terminal to determine a channel rank parameter and determine whether to enable a first MIMO transmission mode; the first information includes N second information, each second information includes third information and fourth information, the third information is used to indicate a reference signal resource for a group of downlink receive beams, and the fourth information includes signal quality related information and channel related information for a group of downlink receive beams, where N is an integer greater than or equal to 1; in the first MIMO transmission mode, the terminal can switch beams in Q directions within a time period, where Q is an integer greater than or equal to 2. The solution provided in the embodiments of the present application is that the network device can accurately estimate the channel rank parameter in the first MIMO transmission mode based on one or more groups of reference signal resources and corresponding downlink receive beam signal quality related information and channel related information reported by the terminal, and determine whether to enable the first MIMO transmission mode, so that when the first MIMO transmission mode is enabled, the channel rank parameter is improved and the spectrum efficiency is also improved compared to when the first MIMO transmission mode is not enabled. BRIEF DESCRIPTION OF THE DRAWINGS

[0070] Figure 1 A flow chart of a traditional MIMO transmission mode;

[0071] Figure 2 A schematic diagram of a new MIMO transmission mode;

[0072] Figure 3 This is a flow chart of an information transmission method according to an embodiment of the present application;

[0073] Figure 4 This is a schematic diagram of a process of performing first information-related measurement using a configured reference signal by a terminal according to an embodiment of the present application;

[0074] Figure 5 This is a flow chart of another information transmission method according to an embodiment of the present application;

[0075] Figure 6 A flowchart illustrating a method for determining a channel rank parameter based on beam selection is provided as an example for the application of this application;

[0076] Figure 7 A flowchart illustrating another method for determining a channel rank parameter based on beam selection is provided as an example for the application of this application;

[0077] Figure 8 This is a structural diagram of an information transmission device according to an embodiment of the present application;

[0078] Figure 9This is a schematic diagram of the structure of another information transmission device according to an embodiment of the present application;

[0079] Figure 10 This is a schematic diagram of the network device structure according to an embodiment of the present application;

[0080] Figure 11 This is a schematic diagram of the terminal structure of an embodiment of the present application;

[0081] Figure 12 This is a schematic diagram of the information transmission system structure of an embodiment of the present application. DETAILED DESCRIPTION

[0082] The present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0083] MIMO technology configures multiple receiving antennas at the communication receiving end and multiple transmitting antennas at the communication transmitting end to form multiple signal transmission paths, thereby making full use of spatial resources and exponentially increasing the system channel capacity and spectrum utilization without increasing spectrum resources and antenna transmission power.

[0084] For example, Figure 1 As shown, in a traditional MIMO system, at the information transmitting end (also referred to as the transmitting end), information is sequentially encoded, modulated using quadrature phase shift keying (QPSK), layer mapped, digitally precoded, and modulated using orthogonal frequency division multiplexing (OFDM). The information is then precoded using an analog precoding matrix at the transmitting end, and the precoded signal is sent through multiple transmitting antennas. Correspondingly, at the information receiving end (also referred to as the receiving end), the signal is received through multiple receiving antennas, analog precoded using an analog precoding matrix at the receiving end, and then OFDM demodulation, inverse digital precoding, inverse layer mapping, QPSK demodulation, and decoding are sequentially performed to obtain the corresponding information.

[0085] In the related art, in a traditional MIMO system, a reference signal (such as a channel state information reference signal (CSI-RS, Channel State Information-Reference Signal)) can be used to estimate the characteristics of the channel of the traditional MIMO system; specifically, the reference signal received by the receiving end and the reference signal sent by the transmitting end can be used for estimation to obtain a channel matrix (also called a transmission channel matrix); wherein each item in the channel matrix can be called a channel parameter, which represents the relationship between the reference signal received by the receiving end and the reference signal sent by the transmitting end, and can also be understood as the characteristics of the channel. The size of the channel matrix is ​​related to the number of transmitting beam directions and the number of receiving beam directions.

[0086] For example, assuming that the number of transmit beam directions in a traditional MIMO system is 1 and the number of receive beam directions is 2, when using the reference signal to estimate the characteristics of the channel, a transmission model including the transmitted reference signal, the received reference signal, and the channel matrix can be constructed, as shown in formula (1):

[0087]

[0088] Where x represents the transmitted reference signal (i.e., the signal before OFDM modulation at the transmitting end), and y represents the received reference signal (i.e., the signal after OFDM demodulation at the receiving end). Represents the equivalent channel matrix. Each item in the equivalent channel matrix (also called channel parameter) represents the relationship between the reference signal sent by the transmitter and the reference signal received by the receiver. In this way, in a traditional MIMO system, a known reference signal can be sent by the transmitter, and the equivalent channel matrix can be determined by using the received reference signal at the receiver. Figure 1 As shown, the transmitting end can configure CSI-RS resources between digital precoding and OFDM modulation (which can also be understood as inserting CSI-RS) so that the receiving end can receive CSI-RS in the configured resources and determine the equivalent channel matrix using the received CSI-RS.

[0089] In related technologies, the equivalent channel can be estimated by using the simulated precoding matrix and the channel matrix to obtain the equivalent channel. Specifically, the downlink transmission equivalent channel of the traditional MIMO system can be estimated by formula (2):

[0090] H'=BF RX ·H·BF TX (2)

[0091] Where H represents the channel matrix of the wireless channel, H' represents the estimated equivalent channel matrix, BF TXrepresents the analog precoding matrix at the transmitter, BF RX Represents the analog precoding matrix at the receiving end.

[0092] In related technologies, the equivalent channel matrix can be subjected to singular value decomposition (SVD) to obtain the number of non-zero singular values, i.e., the rank parameter of the channel (also referred to as the channel rank parameter or the rank of the channel matrix, which can be expressed in English as rank or rank index). The rank parameter of the channel is related to the amount of data that can be transmitted simultaneously in parallel in the MIMO system (also referred to as the number of data streams or the number of data layers). The larger the rank parameter of the channel, the larger the amount of data that can be transmitted in parallel and the higher the spectrum utilization rate. Correspondingly, the smaller the rank parameter of the channel, the smaller the amount of data that can be transmitted in parallel and the lower the spectrum utilization rate. In other words, the rank parameter of the channel can be used to determine the relevant performance of the MIMO transmission mode, and the relevant performance can specifically include spectrum efficiency, etc.

[0093] In response to 6G's demand for higher system capacity, a new MIMO system, namely the virtual MIMO system, has been proposed. In this new MIMO system, by changing the dimension of the transmission channel matrix, it is possible to achieve higher spatial multiplexing capabilities in low frequency bands (specifically, the FR1 band), and is expected to achieve a significant improvement in spectrum efficiency. The MIMO transmission mode in the new MIMO system can be called a new MIMO transmission mode.

[0094] In the traditional MIMO transmission mode, the receiving beam direction of the signal receiving end (specifically, the terminal) remains unchanged within a symbol period (which can also be understood as the time length corresponding to a symbol). In the new MIMO transmission mode, the receiving end can switch to different receiving beam directions at different sampling points within a symbol period. In this way, the use of the new MIMO transmission mode can expand the dimension of the channel matrix, thereby improving the rank parameter of the channel (which can also be understood as increasing the number of ranks), so that the number of data streams that can be demodulated by the receiving end is not less than the number of physical channels of the MIMO system, and the spectrum efficiency is high.

[0095] Specifically, if Figure 2As shown, in the low frequency band scenario, in the new MIMO system, at the transmitting end, the information is sequentially encoded, QPSK modulated, layer mapped, digitally precoded, and OFDM modulated (specifically, upsampling may be included), and the transmitting end analog precoding matrix is ​​used for precoding, and the precoded signal is sent through multiple transmitting antennas; correspondingly, at the receiving end, the signal is received through multiple receiving antennas, and the receiving end analog precoding matrix (which may also be called an analog variable beam matrix in the new MIMO system) is used to virtualize two channels, so that the receiving beam direction can be switched when receiving the signal within one symbol period (such as Figure 2 Different samples are received on two RF chains (Radio Frequency Chain), and then OFDM demodulation (which may include downsampling), digital precoding inverse process, inverse layer mapping, QPSK demodulation and decoding are performed in sequence to obtain corresponding information.

[0096] In actual application, the rank parameter of the channel under the new MIMO transmission mode can be estimated to obtain the rank parameter of the channel under the new MIMO transmission mode, and the rank parameter of the channel under the new MIMO transmission mode can be compared with the rank parameter of the channel under the traditional MIMO transmission mode, and the comparison result can be used to determine whether the new MIMO transmission mode needs to be enabled. Specifically, when the rank parameter of the channel under the new MIMO transmission mode is greater than the rank parameter of the channel under the traditional MIMO transmission mode, the spectrum efficiency of the new MIMO transmission mode is improved compared with the traditional MIMO transmission mode (it can also be understood as high spectrum efficiency), and the new MIMO transmission mode can be enabled; when the rank parameter of the channel under the new MIMO transmission mode is less than or equal to the rank parameter of the channel under the traditional MIMO transmission mode, the spectrum efficiency of the new MIMO transmission mode is not improved compared with the traditional MIMO transmission mode, and the new MIMO transmission mode may not be enabled.

[0097] However, in the new MIMO transmission mode, when the receiving end switches the direction of the receiving beam within a symbol period, it is difficult to accurately estimate the rank parameter of the channel in the new MIMO transmission mode using the reference signal configured by the existing reference signal configuration scheme, and it is also impossible to determine whether to turn on (or whether it can be turned on) the new MIMO transmission mode.

[0098] For example, assume that the number of transmit beam directions in a new MIMO system is 1, the number of receive beam directions is 2, and the receiver switches the receive beam direction once within one symbol period. Based on the equivalent channel estimation scheme in the related art, formula (3) can be obtained:

[0099]

[0100] Where x represents the reference signal sent by the transmitter, y represents the reference signal received by the receiver, and h 11 and h 21 It represents the relationship between the reference signal sent by the transmitter and the reference signal received by the receiver before the direction of the receiving beam is switched. 12 and h 22 Indicates the relationship between the reference signal sent by the transmitter and the reference signal received by the receiver after the direction of the receive beam is switched.

[0101] In related technologies, the configured reference signal resources may correspond to one or more symbols. That is, within one symbol period, the same reference signal is used to estimate the channel parameters. However, in the new MIMO transmission mode, since the receiving beam direction switches within one symbol period, if the same reference signal is used to estimate the channel parameters before and after the receiving beam direction switches, the obtained channel parameters will be inaccurate. For example, in the above example, the channel parameters are estimated using x, and the obtained h 12 and h 22 Not applicable to the channel before the receiving beam direction is switched, h 11 and h 21 It is not applicable to the channel after the receiving beam direction is switched, which makes it difficult to use formula (3) to estimate the equivalent channel under the new MIMO transmission mode.

[0102] Based on this, in various embodiments of the present application, the network device can accurately estimate the rank parameter of the channel under the first MIMO transmission mode based on one or more groups of reference signal resources reported by the terminal and the signal quality-related information and channel-related information of the corresponding downlink receiving beam, and determine whether to turn on the first MIMO transmission mode. Therefore, when the first MIMO transmission mode is turned on, the rank parameter of the channel is improved and the spectrum efficiency is also improved compared to the case where the first MIMO transmission mode is not turned on.

[0103] The present application embodiment provides an information transmission method, such as Figure 3 As shown, applied to a network device, the method includes:

[0104] Step 301: Use the first information sent by the terminal to determine the rank parameter of the channel and determine whether to turn on the first MIMO transmission mode; the first information contains N second information, each second information contains third information and fourth information, the third information is used to indicate a reference signal resource of a group of downlink receiving beams, and the fourth information contains signal quality-related information and channel-related information of a group of downlink receiving beams, and N is an integer greater than or equal to 1; under the first MIMO transmission mode, the terminal can switch beams in Q directions within a time period, and Q is an integer greater than or equal to 2.

[0105] In actual applications, the network device may be a base station, such as a gNB. This embodiment of the present application does not limit the name of the network device, as long as its functionality is implemented. The terminal may be referred to as a UE, terminal device, device, or user, etc., and this embodiment of the present application does not limit this.

[0106] In actual application, the first MIMO transmission mode refers to the MIMO transmission mode, which can also be called a virtual MIMO transmission mode.

[0107] The terminal may report the first information to the network device via RRC signaling or MAC CE, etc. That is, the terminal may send RRC signaling or MAC CE, etc. to the network device, where the RRC signaling or MAC CE, etc. includes the first information.

[0108] Based on this, in one embodiment, before step 301, the method may further include:

[0109] Step 300: Receive first information sent by a terminal.

[0110] Here, before step 300, the terminal capable of enabling the first MIMO transmission mode may perform measurement associated with the first information, thereby determining the first information.

[0111] In actual application, a terminal capable of enabling the first MIMO transmission mode can report capability information related to the first MIMO transmission mode to the network device, so that the network device can configure corresponding reference signal resources for the terminal based on the capability information reported by the terminal. The terminal can use the reference signal resources to perform measurements associated with the first information, thereby determining the first information.

[0112] Specifically, in one embodiment, before step 300, the method may further include:

[0113] Receive eighth information sent by the terminal, where the eighth information indicates that the terminal can realize receiving beams in M ​​directions and can switch beams in Q directions within a time period, where M is an integer greater than or equal to 2.

[0114] Here, in actual application, the one time period may specifically include one symbol period, and the eighth information may specifically include: how many times the terminal can switch the direction of different receiving beams within one symbol period (which can also be understood as the number of beam directions in different directions that can be switched), and how many receiving beam directions the terminal has in total (which can also be understood as the number of beams in different directions that can be achieved). Among them, the number of receiving beam directions of the terminal may include the number of receiving beam directions that the terminal can achieve within a preset angle range. The preset angle range can be set according to actual needs, such as 120°, and the embodiments of the present application are not limited to this.

[0115] The terminal may report the eighth information to the network device through radio resource control (RRC) signaling or a media access control element (MAC CE). That is, the terminal may send RRC signaling or a MAC CE to the network device, where the RRC signaling or the MAC CE includes the eighth information.

[0116] In actual application, after receiving the eighth information, the network device may use the eighth information to configure corresponding reference signal resources for the terminal, so that the terminal can use the reference signal resources to perform measurements associated with the first information.

[0117] Based on this, in one embodiment, the method may further include:

[0118] Configuration information associated with M reference signals is sent to the terminal, where M is an integer greater than or equal to 2.

[0119] Here, in actual application, the reference signal may specifically be a CSI-RS, and the configuration information may specifically include configuration information of a reference signal resource.

[0120] In actual applications, in order to accurately determine the rank parameter of the channel in the first MIMO transmission mode, the network device can configure the reference signal using time division multiplexing (TDM) to enable the terminal to perform channel estimation for different receive beam directions, thereby obtaining an equivalent channel. Each of the M reference signals has the same transmission direction but different transmission times, which can also be understood as the M reference signals being transmitted in a fixed direction using TDM.

[0121] For example, assume that the number of transmit beam directions of the network device is 1, the number of receive beam directions of the terminal is 2, and the terminal can switch beams in two directions within a time period. The network device can send two reference signals to the terminal in a TDM manner in a fixed direction; accordingly, the terminal receives the two reference signals and uses the two reference signals to estimate the equivalent channel before and after the receive beam direction is switched. Specifically, the transmission model can be expressed as formula (4):

[0122]

[0123] Where y represents the reference signal received by the terminal, x1 represents the reference signal used to estimate the equivalent channel before the receiving beam direction is switched, x2 represents the reference signal used to estimate the equivalent channel after the receiving beam direction is switched, and h 11 and h 21 It represents the relationship between the reference signal sent by the network device and the reference signal received by the terminal before the direction of the receiving beam is switched. 12 and h 22 It represents the relationship between the reference signal sent by the network device and the reference signal received by the terminal after the direction of the receiving beam is switched. In this way, the terminal can first use x1 to determine h 11 and h 21 , and then use x2 to determine h 12 and h 22 , thereby obtaining the corresponding channel information.

[0124] The network device may send the configuration information to the terminal via RRC signaling, MAC CE, or downlink control information (DCI), etc. That is, the network device may send RRC signaling, MAC CE, or DCI, etc. to the terminal, and the RRC signaling, MAC CE, or DCI, etc. may include the configuration information.

[0125] In actual application, the terminal can perform measurements associated with the first information based on the received configuration information to obtain measurement results; determine the first information using the measurement results, and report the first information to the network device. The measurement associated with the first information can specifically include: the terminal receives the M reference signal resources in M ​​achievable receiving beam directions (which can also be understood as polling M receiving beams), each reference signal resource corresponds to a receiving beam direction, and uses the M reference signal resources for pairing to obtain one or more reference signal resource identifiers (also known as reference signal resource flags or reference signal resource indications) groups, each reference signal resource identifier group corresponds to two or more reference signal resources (which can also be understood as reference signal resources corresponding to a group of downlink receiving beams), and the terminal measures (specifically, the measurement can be performed in a low-frequency scenario) the signal quality related information and channel related information of the downlink receiving beam for each reference signal resource identifier group to obtain the measurement results.

[0126] Specifically, the terminal may measure the signal strength and channel information for each reference signal resource identification group in the one or more reference signal resource identification groups. The signal strength may specifically include reference signal received power (RSRP, Reference Signal Receiving Power), etc., and the channel information may specifically include channel parameters of equivalent channels, etc. If the channel correlation measurement value is determined by the network device, the measurement result may include signal strength and channel information; if the channel correlation measurement value is determined by the terminal, the measurement result may include signal strength and channel correlation measurement value. The terminal may select N reference signal resource identification groups from the one or more reference signal resource identification groups, determine the second information using each reference signal resource identification group in the N reference signal resource identification groups and the corresponding measurement results, determine the first information using the second information, and report the first information to the network device. Among them, the value of N can be specifically configured by the network device and notified to the terminal, and the embodiment of the present application does not limit this; the selection method (which can also be understood as the selection strategy) of selecting N reference signal resource identification groups from the one or more reference signal resource identification groups can be set according to actual needs. For example, when the measurement results can include signal strength and channel correlation measurement values, the N reference signal resource identification groups with the smallest corresponding channel correlation measurement values ​​are selected. The embodiment of the present application does not limit this.

[0127] In step 301, if the channel correlation measurement value is determined by the network device, then the signal quality-related information and channel-related information may include signal strength and channel information. At this time, the network device may first determine the channel correlation measurement value of a set of downlink receiving beams, and use the determined channel correlation measurement value and signal strength to determine the rank parameter of the channel, and determine whether to enable the first MIMO transmission mode.

[0128] Based on this, in one embodiment, the signal quality related information and channel related information include signal strength and channel information; when executing step 301, the method may further include:

[0129] The channel information is used to determine channel correlation measurement values ​​for a group of downlink receive beams.

[0130] Here, in actual application, the channel information may specifically include the channel parameters of the equivalent channel estimated by the terminal using the reference signal resources received from a set of downlink receiving beams. The network device may use the channel parameters to perform calculations to obtain calculation results, and determine the calculation results as the channel correlation measurement values ​​of the set of downlink receiving beams.

[0131] For example, Figure 4 As shown, it is assumed that the terminal can realize 4-directional receiving beams (i.e., M=4) in the first MIMO transmission mode, namely beam A, beam B, beam C, and beam D, and the terminal can switch beams in 2 directions within a time period (i.e., Q=2). At the same time, the network device is a base station, and the base station configures 4 CSI-RS resources in the CSI-RS resource set for the terminal, namely CSI-RS1, CSI-RS 2, CSI-RS 3, and CSI-RS 4. Each CSI-RS resource can be represented by corresponding CSI-RS resource indicator (CRI, CSI-RS Resource Indicator) information, namely CRI1, CRI2, CRI3, and CRI4. The base station can send each of the 4 CSI-RS resources in a fixed direction at different times (which can also be understood as sending CSI-RS resources using TDM, or sending TDMed CSI-RS resources). At this time, 6 CSI-RS resource identification groups (also called CSI-RS group resource indication information, that is, the reference signal resources of the above-mentioned group of downlink receiving beams, which can be expressed as CRI_GROUP in English) can be determined (that is, N=6). As shown in Table 1, each CSI-RS resource identification group contains two CRIs, and each CSI-RS resource identification group corresponds to a receiving beam group (also called a receiving beam group), and each receiving beam group contains two beam directions for receiving the two CRIs.

[0132] CSI-RS resource identification group Receive beam group CRI_GROUP1 = {CRI1, CRI2} {beam A, beam B} CRI_GROUP2 = {CRI1, CRI3} {beam A, beam C} CRI_GROUP3 = {CRI1, CRI4} {beam A, beam D} CRI_GROUP4 = {CRI2, CRI3} {beam B, beam C} CRI_GROUP5 = {CRI2, CRI4} {beam B, beam D} CRI_GROUP6 = {CRI3, CRI4} {beam C, beam D}

[0133] Table 1

[0134] For each CSI-RS resource identifier group, the terminal can use the received CSI-RS resources to estimate the channel parameters of the corresponding equivalent channel (i.e., the above-mentioned channel information). For example, for CRI_GROUP2 = {CRI1, CRI3}, the corresponding received beam group is {beam A, beam C}. In this case, the channel model can be expressed by formula (5):

[0135]

[0136] Where y represents the received reference signal, x1 represents the transmitted reference signal corresponding to CRI1, and x3 represents the transmitted reference signal corresponding to CRI3. The equivalent channel formed by the two directions corresponding to beam A and beam C can also be expressed as formula (6):

[0137]

[0138] Where H' represents the equivalent channel matrix corresponding to CRI_GROUP2, h'1 represents the equivalent channel matrix parameters of the reference signal resource corresponding to CRI1 received by the terminal through beam A, and h'3 represents the equivalent channel matrix parameters of the reference signal resource corresponding to CRI3 received by the terminal through beam C.

[0139] The terminal can use h′1 and h′3 to determine the channel information corresponding to CRI_GROUP2 and report the channel information to the base station. The base station can use the received channel information to determine the channel correlation measurement value corresponding to CRI_GROUP2 (also known as selection correlation, which can be expressed as L1-correction in English). Specifically, the base station can use the channel information corresponding to CRI_GROUP2 to determine h1' and h3', and perform calculations (also known as correlation operations) in combination with formula (7) to obtain a calculation result, and use the calculation result as the channel correlation measurement value corresponding to CRI_GROUP2:

[0140] L1-correction=f(h′1,h′3)=|h′1·h′3| (7)

[0141] Here, L1-correction represents the channel correlation measurement value corresponding to CRI_GROUP2, and |h′1·h′3| represents the inner product of h′1 and h′3. In this way, the base station can use the channel information corresponding to each CSI-RS resource identifier group reported by the terminal to determine the corresponding channel correlation measurement value. Furthermore, the channel correlation measurement value and signal strength can be used to determine the channel rank parameter and whether to enable the first MIMO transmission mode.

[0142] In addition, if the channel correlation measurement value is determined by the terminal, then the signal quality-related information and channel-related information may include signal strength and channel correlation measurement values, and the network device may directly use the signal strength and channel correlation measurement values ​​reported by the terminal to determine the rank parameter of the channel and determine whether to enable the first MIMO transmission mode.

[0143] In actual application, when the signal strength of the reference signal received by the terminal is too low, it can be considered that the terminal and the network device cannot communicate normally. At this time, priority should be given to improving the communication environment of the terminal. The network device does not need to determine the rank parameter of the channel for the terminal, nor does it need to determine whether to turn on the first MIMO transmission mode; when the signal strength of the reference signal received by the terminal meets the minimum requirement, the network device can use the channel correlation measurement value to determine whether to turn on the first MIMO transmission mode.

[0144] Specifically, the network device can use the group of downlink receiving beams with the smallest channel correlation among the N groups of downlink receiving beams reported by the terminal to make a judgment, which may include: when the channel correlation measurement value of the group of downlink receiving beams is close to zero, it can be considered that the beams in the group of downlink receiving beams are not correlated. At this time, the rank parameters of the directions of the various receiving beams in the group of downlink receiving beams can be summed as the rank parameters of the channel. That is to say, in the first MIMO transmission mode, the terminal can effectively increase the rank parameter of the channel by switching the direction corresponding to the group of downlink receiving beams within a time period. Therefore, the first MIMO transmission mode can be turned on. transmission mode, thereby effectively improving the spectrum efficiency; accordingly, when the channel correlation measurement value of the group of downlink receiving beams is large, it can be considered that the beams in the group of downlink receiving beams are correlated. At this time, the minimum value of the rank parameters corresponding to the group of downlink receiving beams can be used as the rank parameter of the channel. That is to say, under the first MIMO transmission mode, it is difficult for the terminal to effectively increase the rank parameter of the channel by switching the direction corresponding to the group of downlink receiving beams within a time period (it can also be understood that there is a correlation limit on the improvement of the rank parameter of the channel). Therefore, it is difficult to effectively improve the spectrum efficiency, and the first MIMO transmission mode is not enabled.

[0145] Based on this, when there are one or more groups of downlink receive beam signal strength and channel correlation measurement values ​​that meet the relevant requirements for effectively increasing the rank parameter of the channel, in one embodiment, using the first information sent by the terminal to determine the rank parameter of the channel and determine whether to enable the first MIMO transmission mode, including:

[0146] Using the first information, determine one or more groups of downlink receive beams whose signal strengths meet a first threshold and whose channel correlation measurement values ​​meet a second threshold, and determine to enable the first MIMO transmission mode;

[0147] Selecting a group of downlink receive beams with the smallest channel correlation from the one or more groups of downlink receive beams;

[0148] The rank parameter of each receiving beam direction in a selected set of downlink receiving beams is summed to obtain the rank parameter of the channel.

[0149] When the signal strength of one or more groups of downlink receive beams meets the relevant requirements for effectively increasing the rank parameter of the channel, but the channel correlation measurement values ​​of all groups of downlink receive beams do not meet the relevant requirements for effectively increasing the rank parameter of the channel, in one embodiment, the first information sent by the terminal is used to determine the rank parameter of the channel and determine whether to enable the first MIMO transmission mode, including:

[0150] Determining, using the first information, that channel correlation measurement values ​​of the N groups of receive beams do not meet a second threshold, and determining not to enable the first MIMO transmission mode;

[0151] Using the first information, select a group of downlink receiving beams from N groups of receiving beams whose signal strength meets the first threshold and whose channel correlation is minimized; use the minimum value of the rank parameters of the selected group of downlink receiving beam directions as the rank parameter of the channel; or use the minimum value of the rank parameters of the M reference signal resources configured by the network device for the terminal as the rank parameter of the channel, where M is an integer greater than or equal to 2.

[0152] The first threshold and the second threshold can be pre-set according to actual needs, and the embodiment of the present application does not limit this.

[0153] Exemplarily, assuming that the network device can use the first information sent by the terminal to determine the signal strength and channel correlation measurement values ​​corresponding to the two groups of receiving beams, when the signal strength of the two groups of receiving beams meets the first threshold and the channel correlation measurement values ​​of the two groups of receiving beams do not meet the second threshold, it can be considered that turning on the first MIMO transmission mode cannot improve the rank parameter of the channel, and it is determined not to turn on the first MIMO transmission mode, and the minimum value of the rank parameters of the group of receiving beam directions with smaller channel correlation measurement values ​​is used as the rank parameter of the channel; when the signal strength of the two groups of receiving beams meets the first threshold, and the channel correlation measurement value of one group of receiving beams meets the second threshold, It can be considered that in the first MIMO transmission mode, using a group of receiving beams that meet the second threshold for reception can improve the rank parameter of the channel, and it is determined to turn on the first MIMO transmission mode, and the minimum value of the rank parameters of the group of receiving beam directions that meet the second threshold is used as the rank parameter of the channel; when the signal strength of the two groups of receiving beams meets the first threshold, and the channel correlation measurement values ​​of the two groups of receiving beams both meet the second threshold, it can be considered that turning on the first MIMO transmission mode can improve the rank parameter of the channel, and it is determined to turn on the first MIMO transmission mode, and the minimum value of the rank parameters of the group of receiving beam directions with smaller channel correlation measurement values ​​is used as the rank parameter of the channel. In this way, the network device can use the first information to determine whether to turn on the first MIMO transmission mode to achieve related performance improvement of the first MIMO transmission mode.

[0154] In actual application, the network device can send indication information to the terminal, instructing the terminal to report the rank parameters of a set of receiving beam directions selected by the network device when determining the rank parameters of the channel, so that the network device can use the reported rank parameters of each beam direction to accurately determine the rank parameters of the channel.

[0155] Based on this, in one embodiment, the method may further include:

[0156] Sending sixth information to the terminal, where the sixth information is used to instruct the terminal to estimate and send rank parameters respectively in a set of selected receive beam directions;

[0157] Receive seventh information sent by the terminal, where the seventh information includes rank parameters of a selected set of receive beam directions.

[0158] Among them, when the network device determines that turning on the first MIMO transmission mode can effectively improve the rank parameter of the channel, and determines to turn on the first MIMO transmission mode, the network device can select a group of downlink receiving beam directions with the smallest channel correlation from the one or more groups of downlink receiving beams, and send the sixth information to the terminal. At this time, the sixth information instructs the terminal to estimate the rank parameters in the group of downlink receiving beam directions with the smallest channel correlation and send the seventh information containing the estimated rank parameters, so that the network device can sum the reported rank parameters of each beam direction to determine the rank parameter of the channel.

[0159] When the network device determines that turning on the first MIMO transmission mode cannot effectively improve the rank parameter of the channel, and determines not to turn on the first MIMO transmission mode, the network device can select a group of downlink receiving beam directions whose signal strength meets the first threshold and whose channel correlation is minimum from the N groups of receiving beams, and send the sixth information to the terminal. At this time, the sixth information instructs the terminal to estimate the rank parameter in the group of downlink receiving beam directions whose signal strength meets the first threshold and whose channel correlation is minimum, and send the seventh information containing the estimated rank parameter, so that the network device can use the minimum value of the rank parameters of each reported beam direction as the rank parameter of the channel; or, the network device can select all M downlink receiving beam directions that the terminal can implement, and send the sixth information to the terminal. At this time, the sixth information instructs the terminal to estimate the rank parameter in all M downlink receiving beam directions, and send the seventh information containing the estimated rank parameter, so that the network device can use the minimum value of the rank parameters of the reported M beam directions as the rank parameter of the channel. Wherein, the M beam directions correspond one to one to the M reference signals.

[0160] In actual application, the network device may send the sixth information to the terminal via RRC signaling, MAC CE, or DCI, etc. That is, the network device may send RRC signaling, MAC CE, or DCI, etc. to the terminal, and the RRC signaling, MAC CE, or DCI, etc. may include the sixth information.

[0161] The terminal may report the seventh information to the network device via RRC signaling or MAC CE, etc. That is, the terminal may send RRC signaling or MAC CE, etc. to the network device, where the RRC signaling or MAC CE, etc. includes the seventh information.

[0162] In actual application, when the network device determines to enable the first MIMO transmission mode, it may send notification information to the terminal to notify (also can be understood as instructing) the terminal to enable the first MIMO transmission mode.

[0163] Based on this, in one embodiment, the method may further include:

[0164] Send fifth information to the terminal, where the fifth information is used to notify the terminal to enable the first MIMO transmission mode.

[0165] Here, in actual application, the network device may send the fifth information to the terminal via RRC signaling, MAC CE, or DCI, etc. That is, the network device may send RRC signaling, MAC CE, or DCI, etc. to the terminal, and the RRC signaling, MAC CE, or DCI, etc. include the fifth information.

[0166] Accordingly, the embodiment of the present application also provides an information transmission method, which is applied to a terminal, such as Figure 5 As shown, the method includes:

[0167] Step 501: Receive the fifth information sent by the network side, where the fifth information is used to notify the terminal to turn on the first MIMO transmission mode. In the first MIMO transmission mode, the terminal can switch beams in Q directions within a time period, where Q is an integer greater than or equal to 2.

[0168] Here, the network side may send the fifth information to the terminal via RRC signaling, MAC CE, or DCI, etc. That is, the network side may send RRC signaling, MAC CE, or DCI, etc. to the terminal, and the RRC signaling, MAC CE, or DCI, etc. may include the fifth information.

[0169] In actual application, before step 501, the terminal can report to the network side the relevant information used to determine the rank parameters of the channel and determine whether to enable the first MIMO transmission mode, so that the network side can use the relevant information to determine the rank parameters of the channel and determine whether to enable the first MIMO transmission mode.

[0170] Based on this, in one embodiment, before step 501, the method may further include:

[0171] Step 500: Send first information to the network side, where the first information includes N second information, each second information includes third information and fourth information, the third information is used to indicate a reference signal resource of a group of downlink receiving beams, and the fourth information includes signal quality-related information and channel-related information of a group of downlink receiving beams, where N is an integer greater than or equal to 1.

[0172] Here, in actual application, the terminal may report the first information to the network side via RRC signaling or MAC CE, etc. That is, the terminal may send RRC signaling, etc. to the network side, and the RRC signaling, etc. includes the first information.

[0173] In actual application, before step 500, the terminal may perform a measurement associated with the first information to determine the first information. Specifically, the terminal capable of enabling the first MIMO transmission mode may report capability information related to the first MIMO transmission mode to the network side, so that the network side can determine the rank parameter of the channel based on the capability information reported by the terminal.

[0174] Based on this, in one embodiment, the method may further include:

[0175] Eighth information is sent to the network side, where the eighth information indicates that the terminal can realize receiving beams in M ​​directions and can switch beams in Q directions within a time period.

[0176] Here, the terminal may report the eighth information to the network side via RRC signaling or MAC CE, etc. That is, the terminal may send RRC signaling or MAC CE, etc. to the network side, wherein the RRC signaling or MAC CE, etc. includes the eighth information.

[0177] In actual application, after receiving the eighth information, the network side can use the eighth information to configure corresponding reference signal resources for the terminal, so that the terminal can use the reference signal resources to perform measurements associated with the first information.

[0178] Based on this, in one embodiment, the method may further include:

[0179] receiving configuration information associated with M reference signals sent by the network side, where M is an integer greater than or equal to 2;

[0180] Using the configuration information, measurements associated with the first information are performed.

[0181] Here, in actual application, the reference signal may specifically be a CSI-RS, and the configuration information may specifically include a reference signal resource.

[0182] The network side may send the configuration information to the terminal via RRC signaling, MAC CE, or DCI, etc. That is, the network side may send RRC signaling, MAC CE, or DCI, etc. to the terminal, and the RRC signaling, MAC CE, or DCI, etc. may include the configuration information.

[0183] In practical applications, to accurately determine the channel rank parameter in the first MIMO transmission mode, the network side can configure reference signals using a time-division multiplexing (TDM) approach, enabling the terminal to perform channel estimation for different receive beam directions, thereby obtaining an equivalent channel. Each of the M reference signals has the same transmission direction but different transmission time resources, which can also be understood as the M reference signals being transmitted in a fixed direction using TDM.

[0184] In actual application, the terminal can perform measurements associated with the first information based on the received configuration information to obtain measurement results. The first information is then determined using the measurement results, and the first information is reported to the network device. The measurement associated with the first information may specifically include: the terminal receives the M reference signal resources, uses the M reference signal resources to determine one or more reference signal resource identification groups, each reference signal resource identification group corresponds to two or more reference signal resources, and the terminal measures (specifically, the measurement can be performed in a low-frequency scenario) the signal quality related information and channel related information of the downlink receive beam for each reference signal resource identification group to obtain the measurement result.

[0185] Specifically, the terminal may measure signal strength and channel information for each reference signal resource identifier group in the one or more reference signal resource identifier groups. The signal strength may specifically include RSRP, etc., and the channel information may specifically include channel parameters of an equivalent channel, etc. When the terminal does not use channel information to determine a channel correlation measurement value, the measurement result may include signal strength and channel information; when the terminal uses channel information to determine a channel correlation measurement value, the measurement result may include signal strength and channel correlation measurement value.

[0186] Based on this, in one embodiment, the signal quality related information and channel related information include signal strength and channel correlation measurement values;

[0187] or,

[0188] The signal quality related information and channel related information include signal strength and channel information.

[0189] After determining the signal quality related information and channel related information, the terminal can select N reference signal resource identification groups from the one or more reference signal resource identification groups, where N is an integer greater than or equal to 1, and use each reference signal resource identification group in the N reference signal resource identification groups and the corresponding measurement result to determine the second information, and then use the second information to determine the first information and report the first information to the network device. Among them, the selection method (which can also be understood as a selection strategy) for selecting N reference signal resource identification groups from the one or more reference signal resource identification groups can be set according to actual needs. For example, when the measurement results can include signal strength and channel correlation measurement values, select N reference signal resource identification groups with the smallest corresponding channel correlation measurement values. This embodiment of the present application does not limit this.

[0190] In actual application, the network side can use the first information reported by the terminal to determine the rank parameter of the channel and determine whether to turn on the first MIMO transmission mode. When it is determined to turn on the first MIMO transmission mode, step 501 is executed to notify (which can also be understood as instructing) the terminal to turn on the first MIMO transmission mode.

[0191] At the same time, when determining the rank parameter of the channel, the network side may select a set of receive beam directions according to a preset strategy, and use the rank parameters of the selected set of receive beam directions to determine the rank parameter of the channel. At this time, the network side may send an instruction to the terminal, instructing the terminal to report the rank parameters of the selected set of receive beam directions.

[0192] Based on this, in one embodiment, the method may further include:

[0193] receiving sixth information sent by the network side, where the sixth information is used to instruct the terminal to estimate and send rank parameters respectively in a set of receive beam directions;

[0194] Seventh information is sent to the network side, where the seventh information includes a rank parameter of an indicated set of receiving beam directions.

[0195] Here, in actual application, the network side may send the sixth information to the terminal via RRC signaling, MAC CE, or DCI, etc. That is, the network side may send RRC signaling, MAC CE, or DCI, etc. to the terminal, and the RRC signaling, MAC CE, or DCI, etc. may include the sixth information.

[0196] The terminal may report the seventh information to the network side via RRC signaling or MAC CE, etc. That is, the terminal may send RRC signaling or MAC CE, etc. to the network side, wherein the RRC signaling or MAC CE, etc. includes the seventh information.

[0197] In the information transmission method provided by the embodiment of the present application, a network device uses first information sent by a terminal to determine the rank parameter of a channel and determine whether to enable a first MIMO transmission mode; the first information includes N second information, each second information includes third information and fourth information, the third information is used to indicate a reference signal resource of a group of downlink receive beams, and the fourth information includes signal quality related information and channel related information of a group of downlink receive beams, where N is an integer greater than or equal to 1; in the first MIMO transmission mode, the terminal can switch beams in Q directions within a time period, where Q is an integer greater than or equal to 2. In the scheme provided by the embodiment of the present application, the network device can accurately estimate the rank parameter of the channel in the first MIMO transmission mode based on one or more groups of reference signal resources and corresponding downlink receive beam signal quality related information and channel related information reported by the terminal, and determine whether to enable the first MIMO transmission mode, so that when the first MIMO transmission mode is enabled, the channel rank parameter is improved and the spectrum efficiency is also improved compared to when the first MIMO transmission mode is not enabled.

[0198] The present application is described in further detail below with reference to application examples.

[0199] In the application example of the present application, a channel rank parameter determination method based on beam selection is provided, in which the base station can determine the receiving beam direction that meets the preset conditions in the virtual MIMO system (which can also be understood as the optimal receiving beam direction), and then determine the channel rank parameter corresponding to the receiving beam direction that meets the preset conditions, and determine whether virtual MIMO (that is, the above-mentioned first MIMO transmission mode) transmission can be performed.

[0200] In the virtual MIMO transmission mode, the direction of the receiving beam can be switched within a symbol period. When the correlation between the channel information before switching and the channel information after switching is determined by the terminal, such as Figure 6 As shown, the process of the channel rank parameter determination method based on beam selection includes:

[0201] Step 601: The terminal reports capability information (i.e., the eighth information) to the base station;

[0202] In actual application, the capability information includes the number Q of receiving beams in different directions that the terminal can switch out within one symbol period, and the number M of receiving beams in different directions that can be achieved, where Q is an integer greater than or equal to 2, and M is an integer greater than or equal to 2.

[0203] Step 602: The base station configures and sends M reference signal resources according to the capability information reported by the terminal;

[0204] Specifically, the base station can send M different reference signals in a fixed direction via TDM, where the reference signals can specifically include CSI-RS. It should be noted that configuring M reference signal resources can also be understood as configuring corresponding reference signal resources for each achievable receive beam of each terminal, that is, each reference signal resource corresponds to a receive beam in one direction.

[0205] For example, in a low-frequency scenario, when the base station configures M CSI-RS resources, a field can be added to the NZP-CSI-RS-ResourceSet field in the RRC signaling. The field can be specifically called the "PMIMO-for-BM" field, and the value of the field can be configured as "on" or "off". When the field is configured to "on", the CSI-RS resource set can be used for beam management in the virtual MIMO transmission mode, and the downlink transmission direction that meets the preset conditions is determined by TDM (it can also be understood as a downlink transmission direction group, that is, a group of receiving beam directions selected above).

[0206] Step 603: The terminal performs RSRP measurement and correlation measurement using the M reference signal resources to obtain measurement results;

[0207] In actual application, the terminal can use the capability information to group the received beams to obtain W groups, each of which contains Q beams and corresponds to Q reference signal resources, where W is an integer greater than or equal to one. The Q reference signal resources can also be understood as a reference signal resource identification group. Each reference signal resource can be identified by CRI, and each reference signal resource identification group can be identified by CSI-RS group resource indication information (CRI_GROUP). In this way, the terminal can perform measurements for each reference signal resource identification group.

[0208] Specifically, for each reference signal resource identification group, the measurement result of the RSRP measurement includes the RSRP value corresponding to the reference signal resource identification group, and the RSRP value can also be called the L1-RSRP value (that is, the above-mentioned signal strength). The specific implementation of the RSRP measurement can be understood in accordance with the relevant technology, and the embodiment of the present application is not limited to this; the measurement result of the correlation measurement includes the inner product operation of the equivalent channel parameters estimated by the receiving beam direction corresponding to the reference signal resource identification group, and the operation result obtained (that is, the above-mentioned channel correlation measurement value), and the operation result can also be called the L1-correction value.

[0209] Step 604: The terminal reports the measurement result and the corresponding reference signal resource identifier group to the base station;

[0210] In actual application, the terminal may use a preset selection strategy to select N reference signal resource identification groups from the W reference signal resource identification groups, and report the measurement results corresponding to the N reference signal resource identification groups, where N is an integer greater than or equal to 1 and may be configured by the base station and notified to the terminal. The preset selection strategy may be set according to actual needs, and may include, for example, selecting the N reference signal resource identification groups with the largest L1-RSRP values, or selecting the N reference signal resource groups with the smallest L1-correction values.

[0211] Step 605: The base station receives the measurement result reported by the terminal and determines whether the measurement result meets the threshold requirement; selects a reference signal resource group based on the determination result, and determines whether to enable the virtual MIMO transmission mode;

[0212] In actual application, the base station can separately determine whether the L1-RSRP value meets the threshold requirement corresponding to the RSRP value (i.e., the above-mentioned first threshold), and whether the L1-correction value meets the threshold requirement corresponding to the correlation (i.e., the above-mentioned second threshold);

[0213] Specifically, when the L1-RSRP values ​​corresponding to all reference signal resource groups do not meet the requirements, it can be considered that the base station and the terminal cannot communicate normally, and the communication environment needs to be improved first, and the subsequent steps will not be executed; when there are one or more reference signal resource groups whose corresponding L1-RSRP values ​​meet the requirements, but the L1-correction values ​​corresponding to all reference signal resource groups do not meet the requirements, it is determined not to enable the virtual MIMO transmission mode, and select the reference signal resource group with the smallest L1-correction value, or select the reference signal resource group composed of all reference signal resources as the selected reference signal resource group; when there are one or more reference signal resource groups whose corresponding L1-RSRP values ​​meet the requirements, and at the same time, the corresponding L1-correction values ​​do not meet the requirements, it is determined to enable the virtual MIMO transmission mode, and select the reference signal resource group with the smallest L1-correction value.

[0214] Step 606: The base station notifies the terminal to enable or disable the virtual MIMO transmission mode, and measures the rank parameter of the beam corresponding to the selected reference signal resource group;

[0215] Step 607: The terminal measures the rank parameter of the beam corresponding to the selected reference signal resource group and reports it to the base station;

[0216] In actual application, the selected reference signal resource group corresponds to multiple beams. The terminal can perform equivalent channel estimation on each of the multiple beams to obtain equivalent channel parameters, and then use the equivalent parameters to determine the rank parameter of the beam.

[0217] Step 608: The base station determines the rank parameter of the channel using the rank parameter of the beam reported by the terminal.

[0218] Specifically, when there are one or more reference signal resource groups whose corresponding L1-RSRP values ​​meet the requirements, but the L1-correction values ​​corresponding to all reference signal resource groups do not meet the requirements, the base station can use the minimum value of the rank parameters of the beam reported by the terminal as the rank parameter of the channel; when there are one or more reference signal resource groups whose corresponding L1-RSRP values ​​meet the requirements, and at the same time, the corresponding L1-correction values ​​do not meet the requirements, the base station can use the sum of the rank parameters of the beam reported by the terminal as the rank parameter of the channel.

[0219] When the correlation between the channel information before switching and the channel information after switching is determined by the base station, such as Figure 7 As shown, the process of the channel rank parameter determination method based on beam selection includes:

[0220] Step 701: The terminal reports capability information to the base station;

[0221] Step 702: The base station configures and sends M reference signal resources according to the capability information reported by the terminal;

[0222] Step 703: The terminal performs RSRP measurement and channel information measurement using the M reference signal resources to obtain measurement results;

[0223] Specifically, for each reference signal resource identification group, the measurement result of the RSRP measurement includes the RSRP value corresponding to the reference signal resource identification group, which can also be called the L1-RSRP value (that is, the above-mentioned signal strength). The specific implementation of the RSRP measurement can be understood according to the relevant technology, and the embodiment of the present application is not limited to this; the measurement result of the channel information measurement includes the equivalent channel parameters (that is, the above-mentioned channel information) estimated by the receiving beam direction corresponding to the reference signal resource identification group.

[0224] Step 704: The terminal reports the measurement result and the corresponding reference signal resource identifier group to the base station;

[0225] In actual application, the terminal may use a preset selection strategy to select N reference signal resource identifier groups from the W reference signal resource identifier groups, and report the measurement results corresponding to the N reference signal resource identifier groups, where N is an integer greater than or equal to 1 and may be configured by the base station and notified to the terminal. The preset selection strategy may be set according to actual needs, and may, for example, include selecting the N reference signal resource identifier groups with the largest L1-RSRP values.

[0226] Step 705: The base station receives the measurement result reported by the terminal and determines whether the measurement result meets the threshold requirement; selects a reference signal resource group based on the determination result, and determines whether to enable the virtual MIMO transmission mode;

[0227] In actual applications, the base station can first use the equivalent channel parameters to perform an inner product operation to obtain the operation result, use the operation result as the L1-correction value, and then determine whether the L1-RSRP value meets the threshold requirement corresponding to the RSRP value and whether the L1-correction value meets the threshold requirement corresponding to the correlation.

[0228] Specifically, when the L1-RSRP values ​​corresponding to all reference signal resource groups do not meet the requirements, it can be considered that the base station and the terminal cannot communicate normally, and the communication environment needs to be improved first, and the subsequent steps will not be executed; when there are one or more reference signal resource groups whose corresponding L1-RSRP values ​​meet the requirements, but the L1-correction values ​​corresponding to all reference signal resource groups do not meet the requirements, it is determined not to enable the virtual MIMO transmission mode, and select the reference signal resource group with the smallest L1-correction value, or select the reference signal resource group composed of all reference signal resources as the selected reference signal resource group; when there are one or more reference signal resource groups whose corresponding L1-RSRP values ​​meet the requirements, and at the same time, the corresponding L1-correction values ​​do not meet the requirements, it is determined to enable the virtual MIMO transmission mode, and select the reference signal resource group with the smallest L1-correction value.

[0229] Step 706: The base station notifies the terminal to enable or disable the virtual MIMO transmission mode, and measures the rank parameter of the beam corresponding to the selected reference signal resource group;

[0230] Step 707: The terminal measures the rank parameter of the beam corresponding to the selected reference signal resource group and reports it to the base station;

[0231] Step 708: The base station determines the rank parameter of the channel using the rank parameter of the beam reported by the terminal.

[0232] Among them, the specific implementation of steps 701-702 and steps 706-708 can be understood according to steps 601-602 and steps 606-608, and will not be repeated here.

[0233] The channel rank parameter determination method based on beam selection provided in the application example of the present application includes an information transmission scheme, in which the base station configures the reference signal resources by means of TDM according to the capability information reported by the terminal, and the terminal uses the reference signal resources to perform measurements and report the measurement results, so that the base station can determine whether turning on the virtual MIMO transmission mode can effectively improve the rank parameters of the channel (that is, whether it can effectively improve the spectrum efficiency) based on whether the measurement results reported by the terminal meet the preset threshold, and then determine whether to turn on the virtual MIMO transmission mode, and select a group of receiving beam directions that best meet the preset conditions (that is, the L1-RSRP value is as large as possible and the L1-correction value is as small as possible), and notify the terminal to measure the rank parameters of the selected group of receiving beam directions under the corresponding MIMO transmission mode, so that the base station can use the rank parameters of the selected group of receiving beam directions reported by the terminal to determine the rank parameters under the corresponding MIMO transmission mode as the rank parameters of the channel. In this way, the base station can accurately estimate the rank parameter of the channel under the virtual MIMO transmission mode and determine whether to turn on the virtual MIMO transmission mode. As a result, when the virtual MIMO transmission mode is turned on, the rank parameter of the channel is improved and the spectrum efficiency is also improved compared to when the virtual MIMO transmission mode is not turned on.

[0234] In order to implement the method of the network device side of the embodiment of the present application, the embodiment of the present application also provides an information transmission device, which is set on the network device, such as Figure 8 As shown, the device includes:

[0235] Determination unit 801 is used to determine the rank parameter of the channel and determine whether to turn on the first MIMO transmission mode by using the first information sent by the terminal; the first information includes N second information, each second information includes third information and fourth information, the third information is used to indicate a reference signal resource of a group of downlink receiving beams, and the fourth information includes signal quality-related information and channel-related information of a group of downlink receiving beams, and N is an integer greater than or equal to 1; under the first MIMO transmission mode, the terminal can switch beams in Q directions within a time period, and Q is an integer greater than or equal to 2.

[0236] In one embodiment, the device may further include:

[0237] The first receiving unit 802 is configured to receive first information sent by the terminal.

[0238] In one embodiment, the signal quality related information and the channel related information include signal strength and channel correlation measurement values, and the determining unit 801 is specifically configured to:

[0239] Using the first information, determine one or more groups of downlink receive beams whose signal strengths meet a first threshold and whose channel correlation measurement values ​​meet a second threshold, and determine to enable the first MIMO transmission mode;

[0240] Selecting a group of downlink receive beams with the smallest channel correlation from the one or more groups of downlink receive beams;

[0241] Summing the rank parameters of each receiving beam direction in a selected set of downlink receiving beams to obtain the rank parameter of the channel;

[0242] The device may also include:

[0243] The first sending unit is configured to send fifth information to the terminal, where the fifth information is used to notify the terminal to enable the first MIMO transmission mode.

[0244] In one embodiment, the signal quality related information and the channel related information include signal strength and channel correlation measurement values, and the determining unit 801 is specifically configured to:

[0245] Determining, using the first information, that channel correlation measurement values ​​of the N groups of receive beams do not meet a second threshold, and determining not to enable the first MIMO transmission mode;

[0246] Using the first information, select a group of downlink receiving beams from N groups of receiving beams whose signal strength meets the first threshold and whose channel correlation is minimized; use the minimum value of the rank parameters of the selected group of downlink receiving beam directions as the rank parameter of the channel; or use the minimum value of the rank parameters of the M reference signal resources configured by the network device for the terminal as the rank parameter of the channel, where M is an integer greater than or equal to 2.

[0247] In one embodiment, the signal quality related information and channel related information include signal strength and channel information, and the determining unit 801 is specifically configured to:

[0248] Determining channel correlation measurement values ​​for a set of downlink receive beams using the channel information;

[0249] Using the first information, determine one or more groups of downlink receive beams whose signal strengths meet a first threshold and whose channel correlation measurement values ​​meet a second threshold, and determine to enable the first MIMO transmission mode;

[0250] Selecting a group of downlink receive beams with the smallest channel correlation from the one or more groups of downlink receive beams;

[0251] Summing the rank parameters of each receiving beam direction in a selected set of downlink receiving beams to obtain the rank parameter of the channel;

[0252] The first sending unit is configured to send fifth information to the terminal, where the fifth information is used to notify the terminal to enable the first MIMO transmission mode.

[0253] In one embodiment, the signal quality related information and channel related information include signal strength and channel information, and the determining unit 801 is specifically configured to:

[0254] Determining channel correlation measurement values ​​for a set of downlink receive beams using the channel information;

[0255] Determining, using the first information, that channel correlation measurement values ​​of the N groups of receive beams do not meet a second threshold, and determining not to enable the first MIMO transmission mode;

[0256] Using the first information, select a group of downlink receiving beams from N groups of receiving beams whose signal strength meets the first threshold and whose channel correlation is minimized; use the minimum value of the rank parameters of the selected group of downlink receiving beam directions as the rank parameter of the channel; or use the minimum value of the rank parameters of the M reference signals configured by the network device for the terminal as the rank parameter of the channel, where M is an integer greater than or equal to 2.

[0257] In one embodiment, the first sending unit is further configured to:

[0258] Sending sixth information to the terminal, where the sixth information is used to instruct the terminal to estimate and send rank parameters respectively in a set of selected receive beam directions;

[0259] The first receiving unit 802 is configured to receive seventh information sent by the terminal, where the seventh information includes rank parameters of a selected set of receiving beam directions.

[0260] In one embodiment, the first sending unit is further configured to:

[0261] Configuration information associated with M reference signals is sent to the terminal, where M is an integer greater than or equal to 2.

[0262] In one embodiment, the first receiving unit 802 is further configured to:

[0263] Eighth information sent by the terminal is received, where the eighth information represents that the terminal can implement receiving beams in M ​​directions and can switch beams in Q directions within a time period.

[0264] In actual application, the first receiving unit 802 and the first sending unit can be implemented by a communication interface in the information transmission device, and the determining unit 801 can be implemented by a processor in the information transmission device.

[0265] In order to implement the method on the terminal side of the embodiment of the present application, the embodiment of the present application also provides an information configuration device, which is set on the terminal, such as Figure 9 As shown, the device includes:

[0266] The second receiving unit 901 is used to receive the fifth information sent by the network side, where the fifth information is used to notify the terminal to turn on the first MIMO transmission mode. In the first MIMO transmission mode, the terminal can switch beams in Q directions within a time period, where Q is an integer greater than or equal to 2.

[0267] In one embodiment, the device may further include:

[0268] The second sending unit 902 is used to send first information to the network side, where the first information includes N second information, each second information includes third information and fourth information, the third information is used to indicate a reference signal resource of a group of downlink receiving beams, and the fourth information includes signal quality-related information and channel-related information of a group of downlink receiving beams, and N is an integer greater than or equal to 1.

[0269] In one embodiment, the second receiving unit 901 is further configured to:

[0270] receiving sixth information sent by the network side, where the sixth information is used to instruct the terminal to estimate and send rank parameters respectively in a set of receive beam directions;

[0271] The second sending unit 902 is further configured to send seventh information to the network side, where the seventh information includes a rank parameter indicating a set of receiving beam directions.

[0272] In one embodiment, the second receiving unit 901 is further configured to:

[0273] receiving configuration information associated with M reference signals sent by the network side, where M is an integer greater than or equal to 2;

[0274] The device may also include:

[0275] A measuring unit is configured to perform measurement associated with the first information using the configuration information.

[0276] In one embodiment, the second sending unit 902 is further configured to:

[0277] Eighth information is sent to the network side, where the eighth information indicates that the terminal can realize receiving beams in M ​​directions and can switch beams in Q directions within a time period.

[0278] In actual application, the second receiving unit 901 and the second sending unit 902 can be implemented by a communication interface in the information transmission device, and the measuring unit can be implemented by a processor in the information transmission device.

[0279] It should be noted that the information transmission device provided in the above embodiment is only illustrated by the division of the above-mentioned program units when performing information transmission. In actual applications, the above-mentioned processing can be assigned to different program units as needed, that is, the internal structure of the device can be divided into different program units to complete all or part of the above-mentioned processing. In addition, the information transmission device provided in the above embodiment and the information transmission method embodiment are based on the same concept. The specific implementation process is detailed in the method embodiment and will not be repeated here.

[0280] Based on the hardware implementation of the above program modules, and in order to implement the method of the network device side of the embodiment of the present application, the embodiment of the present application also provides a network device, such as Figure 10 As shown, the network device 1000 includes:

[0281] The first communication interface 1001 is capable of exchanging information with the terminal;

[0282] The first processor 1002 is connected to the first communication interface 1001 to implement information interaction with the terminal, and is used to execute the method provided by one or more technical solutions on the network device side when running a computer program; the computer program is stored in the first memory 1003.

[0283] Specifically, the first processor 1002 is configured to:

[0284] The first information sent by the terminal is used to determine the rank parameter of the channel and to determine whether to turn on the first MIMO transmission mode; the first information contains N second information, each second information contains third information and fourth information, the third information is used to indicate a reference signal resource of a group of downlink receiving beams, and the fourth information contains signal quality-related information and channel-related information of a group of downlink receiving beams, and N is an integer greater than or equal to 1; under the first MIMO transmission mode, the terminal can switch beams in Q directions within a time period, and Q is an integer greater than or equal to 2.

[0285] In one embodiment, the first communication interface 1001 is used to:

[0286] Receive first information sent by the terminal.

[0287] In one embodiment, the signal quality related information and the channel related information include signal strength and channel correlation measurement values, and the first processor 1002 is specifically configured to:

[0288] Using the first information, determine one or more groups of downlink receive beams whose signal strengths meet a first threshold and whose channel correlation measurement values ​​meet a second threshold, and determine to enable the first MIMO transmission mode;

[0289] Selecting a group of downlink receive beams with the smallest channel correlation from the one or more groups of downlink receive beams;

[0290] Summing the rank parameters of each receiving beam direction in a selected set of downlink receiving beams to obtain the rank parameter of the channel;

[0291] The first communication interface 1001 is used to send fifth information to the terminal, where the fifth information is used to notify the terminal to enable the first MIMO transmission mode.

[0292] In one embodiment, the signal quality related information and the channel related information include signal strength and channel correlation measurement values, and the first processor 1002 is specifically configured to:

[0293] Determining, using the first information, that channel correlation measurement values ​​of the N groups of receive beams do not meet a second threshold, and determining not to enable the first MIMO transmission mode;

[0294] Using the first information, select a group of downlink receiving beams from N groups of receiving beams whose signal strength meets the first threshold and whose channel correlation is minimized; use the minimum value of the rank parameters of the selected group of downlink receiving beam directions as the rank parameter of the channel; or use the minimum value of the rank parameters of the M reference signal resources configured by the network device for the terminal as the rank parameter of the channel, where M is an integer greater than or equal to 2.

[0295] In one embodiment, the signal quality related information and the channel related information include signal strength and channel information, and the first processor 1002 is specifically configured to:

[0296] Determining channel correlation measurement values ​​for a set of downlink receive beams using the channel information;

[0297] Using the first information, determine one or more groups of downlink receive beams whose signal strengths meet a first threshold and whose channel correlation measurement values ​​meet a second threshold, and determine to enable the first MIMO transmission mode;

[0298] Selecting a group of downlink receive beams with the smallest channel correlation from the one or more groups of downlink receive beams;

[0299] Summing the rank parameters of each receiving beam direction in a selected set of downlink receiving beams to obtain the rank parameter of the channel;

[0300] The first communication interface 1001 is used to send fifth information to the terminal, where the fifth information is used to notify the terminal to enable the first MIMO transmission mode.

[0301] In one embodiment, the signal quality related information and the channel related information include signal strength and channel information, and the first processor 1002 is specifically configured to:

[0302] Determining channel correlation measurement values ​​for a set of downlink receive beams using the channel information;

[0303] Determining, using the first information, that channel correlation measurement values ​​of the N groups of receive beams do not meet a second threshold, and determining not to enable the first MIMO transmission mode;

[0304] Using the first information, select a group of downlink receiving beams from N groups of receiving beams whose signal strength meets the first threshold and whose channel correlation is minimized; use the minimum value of the rank parameters of the selected group of downlink receiving beam directions as the rank parameter of the channel; or use the minimum value of the rank parameters of the M reference signals configured by the network device for the terminal as the rank parameter of the channel, where M is an integer greater than or equal to 2.

[0305] In one embodiment, the first communication interface 1001 is further configured to:

[0306] Sending sixth information to the terminal, where the sixth information is used to instruct the terminal to estimate and send rank parameters in a selected set of receiving beam directions respectively; and receiving seventh information sent by the terminal, where the seventh information includes the rank parameters in the selected set of receiving beam directions.

[0307] In one embodiment, the first communication interface 1001 is further configured to:

[0308] Configuration information associated with M reference signals is sent to the terminal, where M is an integer greater than or equal to 2.

[0309] In one embodiment, the first communication interface 1001 is further configured to:

[0310] Eighth information sent by the terminal is received, where the eighth information represents that the terminal can implement receiving beams in M ​​directions and can switch beams in Q directions within a time period.

[0311] It should be noted that the specific processing process of the first processor 1002 and the first communication interface 1001 can be understood by referring to the above method.

[0312] Of course, in actual application, the various components in the network device 1000 are coupled together through the bus system 1004. It is understood that the bus system 1004 is used to realize the connection and communication between these components. In addition to the data bus, the bus system 1004 also includes a power bus, a control bus, and a status signal bus. However, for the sake of clarity, Figure 10 Various buses are labeled as bus system 1004.

[0313] The first memory 1003 in the embodiment of the present application is used to store various types of data to support the operation of the network device 1000. Examples of such data include: any computer program used to operate on the network device 1000.

[0314] The methods disclosed in the above embodiments of the present application can be applied to the first processor 1002 or implemented by the first processor 1002. The first processor 1002 may be an integrated circuit chip with signal processing capabilities. During implementation, each step of the above method can be completed by hardware integrated logic circuits in the first processor 1002 or instructions in software form. The above first processor 1002 may be a general-purpose processor, a digital signal processor (DSP), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The first processor 1002 can implement or execute the various methods, steps, and logic block diagrams disclosed in the embodiments of the present application. A general-purpose processor may be a microprocessor or any conventional processor, etc. The steps of the methods disclosed in the embodiments of the present application can be directly embodied as being executed by a hardware decoding processor, or by a combination of hardware and software modules in the decoding processor. The software module can be located in a storage medium located in the first memory 1003. The first processor 1002 reads the information in the first memory 1003 and completes the steps of the above method in combination with its hardware.

[0315] In an exemplary embodiment, the network device 1000 may be implemented by one or more application-specific integrated circuits (ASICs), DSPs, programmable logic devices (PLDs), complex programmable logic devices (CPLDs), field-programmable gate arrays (FPGAs), general-purpose processors, controllers, microcontrollers (MCUs), microprocessors, or other electronic components to perform the aforementioned method.

[0316] Based on the hardware implementation of the above program modules, and in order to implement the method of the terminal side of the embodiment of the present application, the embodiment of the present application also provides a terminal, such as Figure 10 As shown, the terminal 1100 includes:

[0317] The second communication interface 1101 is capable of exchanging information with network devices;

[0318] The second processor 1102 is connected to the second communication interface 1101 to realize information interaction with the network device, and is used to execute the method provided by one or more technical solutions on the terminal side when running the computer program; the computer program is stored in the second memory 1103.

[0319] Specifically, the second communication interface 1101 is used to:

[0320] Receive the fifth information sent by the network side, where the fifth information is used to notify the terminal to turn on the first MIMO transmission mode. Under the first MIMO transmission mode, the terminal can switch beams in Q directions within a time period, where Q is an integer greater than or equal to 2.

[0321] In one embodiment, the second communication interface 1101 is also used to send first information to the network side, where the first information includes N second information, each second information includes third information and fourth information, the third information is used to indicate a reference signal resource of a group of downlink receiving beams, and the fourth information includes signal quality-related information and channel-related information of a group of downlink receiving beams, and N is an integer greater than or equal to 1.

[0322] In one embodiment, the second communication interface 1101 is further used to receive sixth information sent by the network side, and the sixth information is used to instruct the terminal to estimate and send rank parameters respectively in a set of receiving beam directions; and send seventh information to the network side, and the seventh information includes the rank parameters in the indicated set of receiving beam directions.

[0323] In one embodiment, the second communication interface 1101 is further configured to receive configuration information associated with M reference signals sent by the network side, where M is an integer greater than or equal to 2;

[0324] In one embodiment, the second processor 1102 is configured to utilize the configuration information to perform measurements associated with the first information.

[0325] In one embodiment, the second communication interface 1101 is further used to send eighth information to the network side, where the eighth information indicates that the terminal can realize receiving beams in M ​​directions and can switch beams in Q directions within a time period.

[0326] It should be noted that the specific processing process of the second processor 1102 and the second communication interface 1101 can be understood by referring to the above method.

[0327] Of course, in actual application, the various components in the terminal 1100 are coupled together through the bus system 1104. It is understood that the bus system 1104 is used to realize the connection and communication between these components. In addition to the data bus, the bus system 1104 also includes a power bus, a control bus, and a status signal bus. However, for the sake of clarity, Figure 10 Various buses are labeled as bus system 1104.

[0328] The second memory 1103 in the embodiment of the present application is used to store various types of data to support the operation of the terminal 1100. Examples of such data include: any computer program used to operate on the terminal 1100.

[0329] The methods disclosed in the above embodiments of the present application can be applied to or implemented by the second processor 1102. The second processor 1102 may be an integrated circuit chip with signal processing capabilities. During implementation, each step of the above method can be completed by hardware integrated logic circuits or software instructions in the second processor 1102. The above second processor 1102 may be a general-purpose processor, a DSP, or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, etc. The second processor 1102 can implement or execute the various methods, steps, and logic block diagrams disclosed in the embodiments of the present application. A general-purpose processor may be a microprocessor or any conventional processor. The steps of the methods disclosed in the embodiments of the present application can be directly implemented and executed by a hardware decoding processor, or by a combination of hardware and software modules in the decoding processor. The software module may be located in a storage medium located in the second memory 1103. The second processor 1102 reads the information in the second memory 1103 and, in conjunction with its hardware, completes the steps of the above method.

[0330] In an exemplary embodiment, the terminal 1100 may be implemented by one or more ASICs, DSPs, PLDs, CPLDs, FPGAs, general-purpose processors, controllers, MCUs, Microprocessors, or other electronic components to perform the aforementioned methods.

[0331] It can be understood that the memory (first memory 1003, second memory 1103) of the embodiment of the present application can be a volatile memory or a non-volatile memory, and can also include both volatile and non-volatile memories. Among them, the non-volatile memory can be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), a magnetic random access memory (FRAM), a flash memory, a magnetic surface memory, an optical disc, or a compact disc read-only memory (CD-ROM); the magnetic surface memory can be a magnetic disk memory or a tape memory. The volatile memory can be a random access memory (RAM), which is used as an external cache. By way of example and not limitation, many forms of RAM are available, such as static random access memory (SRAM), synchronous static random access memory (SSRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDRSDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct rambus random access memory (DRRAM).The memories described in the embodiments of this application are intended to include, but are not limited to, these and any other suitable types of memories.

[0332] In an exemplary embodiment, the present application also provides a storage medium, namely a computer storage medium, specifically a computer-readable storage medium, which includes, for example, a first memory 1003 storing a computer program, which can be executed by the first processor 1002 of the network device 1000 to complete the steps of the aforementioned network device-side method. Another example includes a second memory 1103 storing a computer program, which can be executed by the second processor 1102 of the terminal 1100 to complete the steps of the aforementioned terminal-side method. The computer-readable storage medium can be a memory such as FRAM, ROM, PROM, EPROM, EEPROM, Flash Memory, magnetic surface storage, optical disk, or CD-ROM.

[0333] In an exemplary embodiment, the embodiment of the present application also provides a computer program product, including a computer program, which can be executed by the first processor 1002 of the network device 1000 to complete the steps described in the aforementioned network device side method, or the computer program can be executed by the second processor 1102 of the terminal 1100 to complete the steps described in the aforementioned terminal side method.

[0334] In order to implement the method of the embodiment of the present application, the embodiment of the present application also provides an information transmission system, such as Figure 12 As shown, the system includes: a network device 1201 and a terminal 1202.

[0335] Here, it should be noted that the specific processing procedures of the network device 1201 and the terminal 1202 have been described in detail above and will not be repeated here.

[0336] It should be noted that: "first", "second", etc. are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0337] In addition, the technical solutions described in the embodiments of the present application can be arbitrarily combined without conflict.

[0338] The above description is merely a preferred embodiment of the present application and is not intended to limit the scope of protection of the present application.

Claims

1. An information transmission method, characterized in that: Applicable to network equipment, including: The first information sent by the terminal is used to determine the rank parameter of the channel and to determine whether to turn on the first multiple-input multiple-output MIMO transmission mode; the first information contains N second information, each second information contains third information and fourth information, the third information is used to indicate a reference signal resource of a group of downlink receiving beams, and the fourth information contains signal quality-related information and channel-related information of a group of downlink receiving beams, and N is an integer greater than or equal to 1; under the first MIMO transmission mode, the terminal can switch beams in Q directions within a time period, and Q is an integer greater than or equal to 2.

2. The method according to claim 1, characterized in that The signal quality related information and channel related information include signal strength and channel correlation measurement values; The determining the rank parameter of the channel by using the first information sent by the terminal and determining whether to enable the first MIMO transmission mode includes: Using the first information, determine one or more groups of downlink receive beams whose signal strengths meet a first threshold and whose channel correlation measurement values ​​meet a second threshold, and determine to enable the first MIMO transmission mode; Selecting a group of downlink receive beams with the smallest channel correlation from the one or more groups of downlink receive beams; Summing the rank parameters of each receiving beam direction in a selected set of downlink receiving beams to obtain the rank parameter of the channel; The method further comprises: Send fifth information to the terminal, where the fifth information is used to notify the terminal to enable the first MIMO transmission mode.

3. The method according to claim 1, characterized in that The signal quality related information and channel related information include signal strength and channel correlation measurement values; The determining the rank parameter of the channel by using the first information sent by the terminal and determining whether to enable the first MIMO transmission mode includes: Determining, using the first information, that channel correlation measurement values ​​of the N groups of receive beams do not meet a second threshold, and determining not to enable the first MIMO transmission mode; Using the first information, select a group of downlink receiving beams from N groups of receiving beams whose signal strength meets the first threshold and whose channel correlation is minimized; use the minimum value of the rank parameters of the selected group of downlink receiving beam directions as the rank parameter of the channel; or use the minimum value of the rank parameters of the M reference signal resources configured by the network device for the terminal as the rank parameter of the channel, where M is an integer greater than or equal to 2.

4. The method according to claim 1, wherein The signal quality related information and channel related information include signal strength and channel information; The determining the rank parameter of the channel by using the first information sent by the terminal and determining whether to enable the first MIMO transmission mode includes: Determining channel correlation measurement values ​​for a set of downlink receive beams using the channel information; Using the first information, determine one or more groups of downlink receive beams whose signal strengths meet a first threshold and whose channel correlation measurement values ​​meet a second threshold, and determine to enable the first MIMO transmission mode; Selecting a group of downlink receive beams with the smallest channel correlation from the one or more groups of downlink receive beams; Summing the rank parameters of each receiving beam direction in a selected set of downlink receiving beams to obtain the rank parameter of the channel; The method further comprises: Send fifth information to the terminal, where the fifth information is used to notify the terminal to enable the first MIMO transmission mode.

5. The method according to claim 1, wherein The signal quality related information and channel related information include signal strength and channel information; The determining the rank parameter of the channel by using the first information sent by the terminal and determining whether to enable the first MIMO transmission mode includes: Determining channel correlation measurement values ​​for a set of downlink receive beams using the channel information; Determining, using the first information, that channel correlation measurement values ​​of the N groups of receive beams do not meet a second threshold, and determining not to enable the first MIMO transmission mode; Using the first information, select a group of downlink receiving beams from N groups of receiving beams whose signal strength meets the first threshold and whose channel correlation is minimized; use the minimum value of the rank parameters of the selected group of downlink receiving beam directions as the rank parameter of the channel; or use the minimum value of the rank parameters of the M reference signals configured by the network device for the terminal as the rank parameter of the channel, where M is an integer greater than or equal to 2.

6. The method according to any one of claims 2 to 5, characterized in that The method further comprises: Sending sixth information to the terminal, where the sixth information is used to instruct the terminal to estimate and send rank parameters respectively in a set of selected receive beam directions; Receive seventh information sent by the terminal, where the seventh information includes rank parameters of a selected set of receive beam directions.

7. The method according to any one of claims 1 to 5, characterized in that The method further comprises: Configuration information associated with M reference signals is sent to the terminal, where M is an integer greater than or equal to 2.

8. The method according to claim 7, characterized in that The method further comprises: Eighth information sent by the terminal is received, where the eighth information indicates that the terminal can implement receiving beams in M ​​directions and can switch beams in Q directions within a time period.

9. An information transmission method, characterized in that: Applied to terminals, including: Receive the fifth information sent by the network side, where the fifth information is used to notify the terminal to turn on the first MIMO transmission mode. Under the first MIMO transmission mode, the terminal can switch beams in Q directions within a time period, where Q is an integer greater than or equal to 2.

10. The method according to claim 9, characterized in that The method further comprises: Send first information to the network side, where the first information includes N second information, each second information includes third information and fourth information, the third information is used to indicate a reference signal resource of a group of downlink receive beams, and the fourth information includes signal quality-related information and channel-related information of a group of downlink receive beams, where N is an integer greater than or equal to 1.

11. The method according to claim 10, characterized in that The signal quality related information and channel related information include signal strength and channel correlation measurement values; or, The signal quality related information and channel related information include signal strength and channel information.

12. The method according to claim 10, characterized in that The method further comprises: receiving sixth information sent by the network side, where the sixth information is used to instruct the terminal to estimate and send rank parameters respectively in a set of receive beam directions; Seventh information is sent to the network side, where the seventh information includes a rank parameter of an indicated set of receiving beam directions.

13. The method according to any one of claims 10 to 12, characterized in that The method further comprises: receiving configuration information associated with M reference signals sent by the network side, where M is an integer greater than or equal to 2; Using the configuration information, measurements associated with the first information are performed.

14. The method according to claim 13, characterized in that The method further comprises: Eighth information is sent to the network side, where the eighth information indicates that the terminal can realize receiving beams in M ​​directions and can switch beams in Q directions within a time period.

15. An information transmission device, characterized in that: include: a determining unit, configured to determine a rank parameter of a channel by using the first information sent by the terminal, and determine whether to enable the first MIMO transmission mode; The first information includes N second information, each second information includes third information and fourth information, the third information is used to indicate the reference signal resources of a group of downlink receiving beams, and the fourth information includes signal quality-related information and channel-related information of a group of downlink receiving beams, and N is an integer greater than or equal to 1; under the first MIMO transmission mode, the terminal can switch beams in Q directions within a time period, and Q is an integer greater than or equal to 2.

16. An information transmission device, characterized in that: include: A receiving unit is used to receive the fifth information sent by the network side, where the fifth information is used to notify the terminal to turn on the first MIMO transmission mode. Under the first MIMO transmission mode, the terminal can switch beams in Q directions within a time period, where Q is an integer greater than or equal to 2.

17. A network device, characterized in that: include: A first processor and a first communication interface; wherein, The first processor is used to determine the rank parameter of the channel and determine whether to turn on the first MIMO transmission mode by using the first information sent by the terminal; the first information contains N second information, each second information contains third information and fourth information, the third information is used to indicate a reference signal resource of a group of downlink receiving beams, and the fourth information contains signal quality-related information and channel-related information of a group of downlink receiving beams, and N is an integer greater than or equal to 1; under the first MIMO transmission mode, the terminal can switch beams in Q directions within a time period, and Q is an integer greater than or equal to 2.

18. A terminal, characterized in that: include: A second processor and a second communication interface; wherein, The second communication interface is used to receive the fifth information sent by the network side, and the fifth information is used to notify the terminal to turn on the first MIMO transmission mode. In the first MIMO transmission mode, the terminal can switch beams in Q directions within a time period, and Q is an integer greater than or equal to 2.

19. A network device, characterized in that: include: a first processor and a first memory for storing a computer program capable of being executed on the processor, Wherein, when the first processor is used to run the computer program, it executes the steps of the method according to any one of claims 1 to 8.

20. A terminal, characterized in that: include: a second processor and a second memory for storing a computer program capable of being executed on the processor, Wherein, when the second processor is used to run the computer program, it executes the steps of the method according to any one of claims 9 to 14.

21. A storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 8 are implemented, or the steps of the method according to any one of claims 9 to 14 are implemented.

22. A computer program product comprising a computer program, characterized in that When the computer program is executed by a processor, the computer program implements the steps of the method according to any one of claims 1 to 8, or implements the steps of the method according to any one of claims 9 to 14.

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