WO2022077402A1

WO2022077402A1 - Method for determining transmission parameters, related apparatus and device, and readable storage medium

Info

Publication number: WO2022077402A1
Application number: PCT/CN2020/121327
Authority: WO
Inventors: 袁世通; 刘凤威
Original assignee: 华为技术有限公司
Priority date: 2020-10-15
Filing date: 2020-10-15
Publication date: 2022-04-21

Abstract

A method for determining transmission parameters, comprising: a first node, before using MIMO to transmit signals to a second node, must first report MIMO parameters in different working modes to a network device. The first node is a subordinate node of the second node. The network device configures a first resource set on the basis of the MIMO parameters reported by the first node, and sends the first resource set to the first node and information of the first resource set and information of the MIMO parameters to the second node. The second node sends indication information to the first node; and the first node selects a reference signal resource on the basis of the indication information, and sends a reference signal to the second node on the basis of configuration information in the reference signal resource. The second node generates control information on the basis of the reference signal and the MIMO parameter information, and sends same to the first node; and the first node selects an SRS resource on the basis of the control information, and transmits signals to the second node on the basis of a pre-coding matrix and configuration information in the SRS resource.

Description

Method and related apparatus and device for determining transmission parameters, and readable storage medium

technical field

The present invention relates to the technical field of determining transmission parameters, and in particular, to a method for determining transmission parameters, related apparatuses and devices, and computer-readable storage media.

Background technique

With the continuous development of mobile communication technology, spectrum resources are becoming increasingly scarce. In order to improve spectrum utilization, MIMO (multiple input multiple output, MIMO) technology is used in mobile communication to transmit and receive signals, which greatly improves the channel efficiency. capacity. A MIMO system is an antenna system in which multiple antennas are used at both the transmitting end and the receiving end, and multiple channels are formed between transmitting and receiving. MIMO technology is a complex antenna diversity technology, and the multipath effect will affect the signal quality. The MIMO system uses the multipath effect to improve the communication quality. In a MIMO system, the transmitter and the receiver use multiple antennas that can work at the same time to communicate. MIMO systems usually use complex signal processing techniques to significantly enhance reliability, transmission range, and throughput. The transmitter uses MIMO technology to transmit multiple RF signals at the same time, and the receiver recovers the data from these signals.

At present, in 5G NR, there are two main ways to use MIMO technology to transmit data in the uplink: one is the MIMO codebook-based uplink transmission, and a variety of codebooks are defined in the protocol. , which can support terminals with various hardware conditions to perform uplink transmission in various scenarios. Another way is that MIMO is based on non-codebook (Non-codebook) uplink transmission. The terminal no longer performs uplink transmission according to the codebook defined by the protocol, but according to the relevant channel state reference signal CSI-RS (Channel State Reference Signal). Information-Reference Signal, CIS-RS) adjusts the weight of the uplink channel by itself, and transmits the signal in the uplink.

However, regardless of whether it is a codebook-based uplink transmission method or a non-codebook-based uplink transmission method, since the access link and the backhaul link may use overlapping time and frequency resources. If the signal sent by the MT of the IAB relay node enters the receiver of the DU of the IAB relay node through leakage or reflection, it will cause serious interference to the normal uplink signal received by the IAB DU. In addition, the working modes of full duplex and space division multiplexing will limit MIMO transmission. For example, some ports and panels are unavailable, and the uplink MIMO transmission scheme of the existing protocol cannot support the uplink transmission of IAB MT in multiple transmission modes.

SUMMARY OF THE INVENTION

The embodiment of the present application proposes a method for determining transmission parameters, which solves the self-interference caused by the IAB relay node and the hardware problems of the IAB relay node in the scenario of MIMO based on space division transmission and uplink full-duplex transmission. MIMO transmission is limited.

In a first aspect, an embodiment of the present application provides a method for determining a transmission parameter, including:

The first node reports its MIMO parameters in different working modes to the network device;

The first node receives a first resource set sent by the network device; wherein the first resource set includes reference signal resources corresponding to different working modes respectively.

The working modes in the embodiments of the present application may include a time division multiplexing mode, a space division multiplexing mode, and a full-duplex mode; the full-duplex mode is optional, and may be further divided into uplink full-duplex and downlink full-duplex. The first node refers to a relay node in the mobile communication network, which can be called a node, a relay node, an IAB node, an IAB node, an IAB relay node, etc.; the network equipment refers to a base station and the like that can implement a wired communication network. A device for wireless signal transmission with wireless terminals.

In this embodiment of the present application, the first node needs to report multiple sets of MIMO parameters to the network device before using MIMO to transmit signals to the second node. The multiple sets of MIMO parameters reported correspond to different working modes. The MIMO parameters configure the corresponding SRS resources so that the first node can select the corresponding SRS resources when using MIMO to transmit signals to the second node, thus solving the problem that the IAB node is generated from the Interference, as well as IAB relay node equipment hardware problems lead to technical problems that limit MIMO transmission. Wherein, the second node is an upper-level node of the first node.

In a possible implementation manner, the MIMO parameters in the different working modes include:

The number of available ports in the different working modes, the relationship information between the available ports, and the number of available panels.

In this embodiment of the present application, a port refers to an antenna port, or port for short, which is a logical port. The MIMO parameters include the number of available ports, the relationship between the available ports, and the number of available panels. The above three pieces of information can explicitly or implicitly indicate the working mode corresponding to the MIMO parameters.

In this embodiment of the present application, the first node reports multiple sets of MIMO parameters to the network device, and the reported multiple sets of MIMO parameters correspond to different working modes. The network device configures multiple sets of SRS resources according to the multiple sets of reported MIMO parameters. According to an explicit instruction or a predefined rule, the first node uses the SRS resource corresponding to the working mode in which the first node is located, and uses the MIMO uplink transmission signal according to the configuration information in the selected SRS resource. In this way, multiple sets of MIMO parameters are reported to the network device, which is beneficial for the network device to configure the corresponding SRS resources, thereby solving the problem that the first node generates self-interference in the scenario of space division transmission and uplink full-duplex transmission. , and the technical problem that the MIMO transmission is limited due to the hardware problem of the first node device.

In a possible implementation manner, the first resource set is a set of multiple reference signal resources, and the sets of multiple reference signal resources respectively correspond to MIMO parameters in the different working modes; wherein each The set of reference signal resources includes multiple reference signal resources, and the reference signal resources in the same set of reference signal resources have the same function; or

The first resource set is a set of reference signal resources, the set of reference signal resources includes multiple types of reference signal resources, and the multiple types of reference signal resources are respectively related to the MIMO parameters in the different working modes. Corresponding; wherein, each type of reference signal resources includes one or more reference signal resources.

In this embodiment of the present application, the first resource set refers to a set of SRS resources configured by the network device for the IAB node. The SRS resources configured by the network device are divided into two types: one is that the first resource set is a plurality of reference signals. The set of resources, the set of reference signal resources refers to the SRS resource set, the multiple SRS resource sets are the SRS resources configured by the network equipment, and each SRS resource set has one or more reference signal resources, so The reference signal resource mentioned above refers to the SRS resource. The network device is configured with multiple SRS resource sets corresponding to the MIMO parameters in different working modes, which is beneficial for the first node to select the SRS resource in the SRS resource set corresponding to the corresponding working mode, and use the configuration information in the SRS resource to send the SRS resource set. The second node transmits signals, thereby solving the technical problems that the first node generates self-interference in the scenarios of space division transmission and uplink full-duplex transmission, and the MIMO transmission is restricted due to hardware problems of the first node.

The other is that the SRS resource refers to a set of reference signal resources, the set of reference signal resources refers to the SRS resource set, and the SRS resource set includes multiple reference signal resources, and the reference signal resource refers to the SRS resource, one or more SRS resources correspond to the same working mode, and the one or more SRS resources are SRS resources configured by the network device. The network equipment is configured with multiple SRS resources corresponding to the MIMO parameters in different working modes, which is helpful for the lower-level IAB node to select the SRS resource in the corresponding SRS resource in the corresponding working mode (one working mode may correspond to multiple SRS resources). , and use the configuration information in the SRS resource to transmit signals to the upper-level IAB node, thus solving the problem of self-interference caused by the IAB relay node in the scenario of space division transmission and uplink full-duplex transmission, and the hardware problem of the IAB node equipment causing MIMO transmission. Restricted technical issues.

In a possible implementation manner, after the first node receives the first resource set configured by the network device, the method further includes:

receiving, by the first node, the first indication information sent by the second node;

sending, by the first node, a first reference signal to the second node by using the first reference signal resource in the first resource set based on the first indication information;

The first node reports first information to the second node; wherein the first information is used to indicate the unavailable TPMI in the different working modes;

Wherein, the first node is a downstream node of the second node.

In this embodiment of the present application, the first indication information may be scheduling signaling sent by the second node to the first node, which is used to instruct the first node to select a corresponding SRS resource to send an SRS signal to the second node; A reference signal resource is an SRS resource selected according to scheduling signaling; the first reference signal may be an SRS signal sent by the first node to the second node.

In this embodiment of the present application, the second node sends scheduling signaling to the first node, which is used to instruct the first node to send an SRS signal to the second node. When the first node transmits a signal to the second node based on a codebook, After sending the SRS signal, the first node will send the unavailable TPMI to the second node, and the function of the TPMI is to indicate the precoding matrix. The first node provides a reference when the second node selects the precoding matrix from the codebook by sending the unavailable TPMI to the second node, so that the second node selects the precoding matrix to avoid those when using MIMO transmission for the first node. , a precoding matrix that may cause problems such as strong interference.

In a possible implementation manner, the first indication information includes indication information of the different working modes and indication information of the unavailable TPMI in the different working modes;

The indication information of the different working modes includes: the number of available ports in the different working modes, the relationship information between the available ports, and the number of available panels.

In this embodiment of the present application, the first indication information includes indication information of different working modes and indication information of unavailable TPMI in the different working modes. For the same TPMI, the precoding matrices indicated in the codebooks corresponding to different working modes may be different, and the indication information of the different working modes is used to indicate which working mode corresponds to the TPMI sent by the first node. codebook, avoiding the situation where one TPMI indicates precoding matrices in multiple codebooks.

In a possible implementation manner, the using the first reference signal resource in the first resource set includes:

The first reference signal resource in the first resource set is selected according to the first state information.

In this embodiment of the present application, after the first node receives the first indication information of the second node, the first indication information includes one or more SRIs, and the one or more SRIs are used to instruct the first node to use the first resource Select the corresponding SRS resource centrally. The first node will select the corresponding SRS resource according to the first state information, and select the corresponding SRS resource from the selected SRS resource according to the first indication information, and then send the SRS resource to the first node according to the configuration information in the selected SRS resource. Two nodes send SRS signals. The first state information implicitly or explicitly indicates the current working mode of the first node. Therefore, the SRS resource selected by the first node according to the first state information is the current working mode of the first node. The corresponding SRS resource. The first node selects the first reference signal resource through the first state information, so that the first node selects the SRS resource in its corresponding working mode, which can effectively avoid strong interference in the process of transmitting signals to the second node, etc. question.

In a possible implementation manner, the first state information is:

Uplink timing information corresponding to different working modes of the first node; or

Time-frequency resources and scheduling information of the DU function module and the MT function module of the first node.

In this embodiment of the present application, the first state information implicitly or explicitly indicates the current working mode of the first node, so that the first node selects the SRS resource corresponding to the working mode, avoiding that one SRI indicates multiple SRS resources Case.

receiving, by the first node, the second indication information and the first channel state reference signal sent by the second node;

The first node sends a second reference signal to the second node by using the first channel state reference signal and the second reference signal resource in the first resource set based on the second indication information;

The first node reports second information to the second node; wherein, the second information is used to indicate the unavailable SRI in the different working modes;

Wherein, the first node is a downstream node of the second node.

In this embodiment of the present application, the second indication information may be scheduling signaling sent by the second node to the first node, and used to instruct the first node to select a corresponding SRS resource to send an SRS signal to the second node; the second reference The signal resource is an SRS resource selected according to scheduling signaling; the first reference signal may be an SRS signal sent by the first node to the second node; the first channel state reference signal is a CSI-RS signal.

In this embodiment of the present application, the second node sends a scheduling signaling to the first node, which is used for the SRS signal sent by the first node to the second node. When the first node sends the SRS signal to the second node in a non-codebook based manner When transmitting a signal, in addition to sending a scheduling signaling to the first node, the second node also sends a CSI-RS signal to the first node, which is used by the first node to estimate the uplink channel, thereby obtaining a precoding matrix. In addition, after sending the SRS signal, the first node will send the unavailable SRI to the second node, and the role of the SRI is to indicate the SRS resource. By sending the unavailable SRI to the second node, the first node provides a reference when the second node selects the SRS resource, so that the second node can avoid the possibility of using MIMO transmission for the first node when selecting the SRS resource. SRS resource that brings problems such as strong interference.

In a possible implementation manner, the second indication information includes indication information of the different working modes and indication information of an unavailable SRI in the different working modes;

In this embodiment of the present application, the second indication information includes indication information of different working modes and indication information of unavailable SRIs in the different working modes. For the same SRI, if the working mode corresponding to the SRS resource is different, the indicated SRS resource may also be different. The indication information of different working modes in the second indication information is used to indicate the SRS resource corresponding to which working mode the SRI sent by the first node corresponds to, avoiding a situation where one SRI indicates multiple SRS resources.

In a possible implementation manner, the using the first channel state reference signal and the second reference signal resource in the first resource set includes:

using the first channel state reference signal, and selecting a second reference signal resource in the first resource set according to the second state information.

In this embodiment of the present application, after receiving the second indication information from the second node, the first node selects a corresponding SRS resource according to the second state information, and sends an SRS signal to the second node according to the configuration information in the SRS resource. The second state information implicitly or explicitly indicates the current working mode of the first node. Therefore, the SRS resource selected by the first node according to the second state information is the current working mode of the first node. The corresponding SRS resource. The first node selects the first reference signal resource through the second state information, so that the first node selects the SRS resource under its corresponding working mode, which can effectively solve problems such as strong interference in the process of transmitting signals to the second node. .

In a possible implementation manner, the second state information is:

The first state information implicitly or explicitly indicates the current working mode of the first node, so that the first node selects the SRS resource corresponding to the working mode, avoiding the situation that one SRI indicates multiple SRS resources.

In a possible implementation manner, the first node reports its MIMO parameters in different working modes to the network device, including:

reporting, by the first node, a second parameter to the network device; wherein, the second parameter is a MIMO parameter of the first node in the first working mode;

receiving, by the first node, the first request signaling sent by the network device;

The first node reports a third parameter to the network device based on the first request signaling; wherein, the third parameter is that the first node is in another working mode other than the first working mode MIMO parameters.

In this embodiment of the present application, the second parameter may be a MIMO parameter reported by the first node in a time-division multiplexing mode; the first working mode is a time-division multiplexing mode; the third parameter may be the first node according to The MIMO parameter reported by the first request signaling; the network device may refer to a device such as a base station that can implement wireless signal transmission between a wired communication network and a wireless terminal.

In this embodiment, there is another way for the first node to report the MIMO parameters to the network device, that is, the first node first reports a set of MIMO parameters to the network device, and the set of MIMO parameters corresponds to the MIMO in the time division multiplexing mode parameter. Then, the first node receives request signaling sent by the network device, where the first request signaling is used to instruct the first node to report one or more sets of MIMO parameters corresponding to other working modes. The first node sends the MIMO parameter to the network device according to the first request signaling, and then receives the SRS resource configured by the network device. When the first node uses MIMO to transmit signals to the superior node, it can select the corresponding SRS resource, thus solving the problem of self-interference generated by the IAB node and the hardware of the IAB relay node in the scenario of space division transmission and uplink full-duplex transmission. The problem causes a technical issue where MIMO transmission is limited.

In a possible implementation manner, the first node receives the first resource set sent by the network device, including:

receiving, by the first node, a set of first reference signal resources configured by the network device according to the second parameter; wherein, the set of first reference signal resources includes a plurality of reference signal resources with the same function;

sending, by the first node, a first request signaling to the network device;

The first node receives the resource set configured by the network device according to the third parameter.

In this embodiment of the present application, the second parameter is the MIMO transmission parameter of the first node in the time division multiplexing mode, and the set of the first reference signal resources is the MIMO transmission with the first node in the time division multiplexing mode The SRS resource set corresponding to the parameter; the resource set is the SRS resource configured by the network device according to the third parameter. The network device configuration resource set and the set of first reference signal resources are helpful for the lower-level IAB node to select the corresponding SRS resource in the corresponding working mode, and use the configuration information in the SRS resource to transmit signals to the upper-level IAB node, thereby solving the problem of space division In the scenario of transmission and uplink full-duplex transmission, the IAB relay node generates self-interference, and the hardware problem of the IAB node equipment causes the technical problem that the MIMO transmission is limited.

sending, by the first node, a first request signaling to the network device;

The first node receives the set of first reference signal resources configured by the network device according to the second parameter and the resource set configured by the network device according to the third parameter.

The network device configuration resource set and the set of first reference signal resources are helpful for the lower-level IAB node to select the corresponding SRS resource in the corresponding working mode, and use the configuration information in the SRS resource to transmit signals to the upper-level IAB node, thereby solving the problem of space division In the scenario of transmission and uplink full-duplex transmission, the IAB relay node generates self-interference, and the hardware problem of the IAB node equipment causes the technical problem that the MIMO transmission is limited.

In a possible implementation manner, the network device sends the first resource set to the first node, including:

sending, by the network device, first request signaling to the first node;

The network device configures the resource set according to the third parameter, and sends the resource set to the first node.

The network device configures the resource set, which helps the lower-level IAB node to select the corresponding SRS resource in the corresponding working mode, and uses the configuration information in the SRS resource to transmit signals to the upper-level IAB node, thus solving the problem of space division transmission and uplink full-duplex transmission. In the scenario, the IAB relay node generates self-interference, and the hardware problem of the IAB node equipment causes the technical problem that the MIMO transmission is limited.

In a possible implementation manner, the resource set includes a set of multiple reference signal resources; wherein, the set of multiple reference signal resources is configured based on the third parameter, and the one reference signal resource reference signal resources in the set of , with the same function; or

The resource set includes a set of reference signal resources, wherein the set of reference signal resources includes a plurality of reference signal resources correspondingly configured based on the third parameter.

In this embodiment of the present application, the resource set refers to a set of SRS resources configured by the network device for the first node, and the SRS resources configured by the network device are divided into two types: one is the resource set that is the resources of multiple reference signals. Set, the set of reference signal resources refers to the SRS resource set, the SRS resource set is the SRS resource configured by the network device, and each SRS resource set has one or more reference signal resources, and the reference signal resources refer to SRS resource. The network device is configured with multiple SRS resource sets corresponding to the MIMO parameters in different working modes, which is beneficial for the first node to select the SRS resource in the SRS resource set corresponding to the corresponding working mode, and use the configuration information in the SRS resource to send the SRS resource set. The upper-level IAB node transmits signals, thereby solving the technical problems that the IAB relay node generates self-interference in the scenario of space division transmission and uplink full-duplex transmission, and the hardware problem of the IAB node equipment causes the MIMO transmission to be limited.

The other is that the SRS resource refers to a set of reference signal resources, the set of reference signal resources refers to the SRS resource set, and the SRS resource set includes multiple reference signal resources, and the reference signal resource refers to the SRS resource, one or more SRS resources corresponding to MIMO parameters in the same working mode are SRS resources configured by the network device. The network equipment is configured with multiple SRS resources corresponding to the MIMO parameters in different working modes, which is helpful for the lower-level IAB node to select the SRS resource in the corresponding SRS resource in the corresponding working mode (one working mode may correspond to multiple SRS resources). , and use the configuration information in the SRS resource to transmit signals to the upper-level IAB node, thus solving the problem of self-interference caused by the IAB relay node in the scenario of space division transmission and uplink full-duplex transmission, and the hardware problem of the IAB node equipment causing MIMO transmission. Restricted technical issues.

In a second aspect, an embodiment of the present application provides a method for determining a transmission parameter, including:

The network device receives the MIMO parameters in different working modes reported by the first node;

The network device configures a first resource set, and sends the first resource set to the first node; wherein the first resource set includes reference signal resources corresponding to different working modes respectively.

In this embodiment of the present application, after receiving multiple sets of MIMO parameters reported by the first node, the network device configures corresponding SRS resources for it. In this way, when the first node uses MIMO to transmit signals to the second node, it can select the corresponding SRS resources. , to effectively avoid problems such as strong interference. The network device refers to a device such as a base station that can realize wireless signal transmission between a wired communication network and a wireless terminal.

In this embodiment of the present application, a port refers to an antenna port, or port for short, which is a logical port. The MIMO parameters include the number of available ports, the relationship between the available ports, and the number of available panels, and the working mode corresponding to the MIMO parameters can be explicitly or implicitly reflected through the above three pieces of information.

In this embodiment of the present application, the first node reports multiple sets of MIMO parameters to the network device, and the reported multiple sets of MIMO parameters correspond to different working modes. The network device configures multiple sets of SRS resources according to the multiple sets of reported MIMO parameters. According to an explicit instruction or a predefined rule, the first node uses the corresponding configuration of SRS resources in different working modes, and uses MIMO uplink transmission signals. In this way, it is beneficial for the network device to configure the corresponding SRS resources. When transmitting signals to the second node, the first node can use the SRS resources adapted to the working mode in which it is located, and use the configuration information in the selected SRS resources to The second node transmits signals, thereby solving the technical problems that the first node generates self-interference in the scenarios of space division transmission and uplink full-duplex transmission, and the hardware problem of the IAB node equipment causes the MIMO transmission to be limited.

The first resource set is a set of reference signal resources, the set of reference signal resources includes multiple types of reference signal resources, and the multiple types of reference signal resources are respectively related to the MIMO parameters in the different working modes. Corresponding respectively; each type of reference signal resource includes one or more reference signal resources.

In this embodiment of the present application, the first resource set refers to a set of SRS resources configured by the network device for the IAB node. The SRS resources configured by the network device are divided into two types: one is that the first resource set is a plurality of reference signals. The set of resources, the set of reference signal resources refers to the SRS resource set, the SRS resource set is the SRS resource, and there is one or more reference signal resources in each SRS resource set, and the reference signal resource refers to the SRS resource. The network device is configured with multiple SRS resource sets corresponding to the MIMO parameters in different working modes, which is beneficial for the first node to select the SRS resource in the SRS resource set corresponding to the corresponding working mode, and use the configuration information in the SRS resource to send the SRS resource set. The second node transmits signals, thereby solving the technical problems that the first node generates self-interference in the scenarios of space division transmission and uplink full-duplex transmission, and the MIMO transmission is restricted due to hardware problems of the first node.

The other is that the SRS resource refers to a set of reference signal resources, the set of reference signal resources refers to the SRS resource set, and multiple reference signal resources in the SRS resource set, and the reference signal resource refers to the SRS resource, one or more SRS resources correspond to the same working mode, and the one or more SRS resources are SRS resources configured by the network device. The network device is configured with multiple SRS resources corresponding to the MIMO parameters in different working modes, which is beneficial for the first I node to select the SRS resource suitable for the working mode in which it is located (one working mode may correspond to multiple SRS resources) and use the configuration information in the selected SRS resource to transmit signals to the second node, thus solving the problem that in the scenario of space division transmission and uplink full-duplex transmission, the first node generates self-interference, and the first node generates self-interference. A technical problem in which the MIMO transmission is limited due to hardware problems of the node equipment.

In a possible implementation manner, configuring the first resource set by the network device further includes:

If the first resource set is a set of multiple reference signal resources, the network device configures corresponding identifiers for the sets of multiple reference signal resources in the first resource set respectively;

If the first resource set is a set of reference signal resources, the network device configures corresponding identifiers for a plurality of reference signal resources in the first resource set respectively.

In this embodiment of the present application, if the first resource set is a set of multiple reference signal resources, that is, when the first resource set is a set of multiple SRS resource sets, the network device configures a corresponding identifier for each SRS resource set; if When the first resource set is a set of reference signal resources, the network device will configure an identifier for each SRS resource. The configuration identifier can effectively distinguish each SRS resource.

In a possible implementation manner, after configuring the first resource set, the network device further includes:

The network device sends the information of the first resource set to the second node.

In the embodiment of the present application, the information of the first resource set includes the information of the MIMO parameter reported by the first node and the information of the SRS resource configured by the network device. After configuring the SRS resources, the network device will send the information of the SRS resources and the information of the MIMO parameters reported by the first node to the second node (the second node is the upper-level node of the first node), so that the second node is the first node Select resources such as SRS resource.

In a possible implementation manner, the network device receives MIMO parameters in different working modes reported by the first node, including:

receiving, by the network device, the second parameter reported by the first node; wherein the second parameter is the MIMO parameter of the first node in the first working mode;

sending, by the network device, first request signaling to the first node;

The network device receives a third parameter reported by the first node based on the first request signaling; wherein the third parameter is a parameter of another mode other than the first working mode.

In this embodiment of the present application, there is another way for the network device to receive the MIMO parameters reported by the first node. The network device first receives the MIMO parameters in the corresponding time division multiplexing mode reported by the first node. Then, the network device sends first request signaling to the first node, where the first request signaling is used to instruct the first node to report one or more sets of MIMO parameters corresponding to other working modes. The network device receives the MIMO parameters and configured SRS resources reported by the first node according to the first request signaling.

In this embodiment of the present application, the second parameter may be a MIMO parameter in a time division multiplexing mode reported by the first node; the first working mode is a time division multiplexing mode; the third parameter may be the first The MIMO parameter reported by the node according to the first request signaling; the network device may refer to a device such as a network device that can implement wireless signal transmission between a wired communication network and a wireless terminal.

The network device configures a set of first reference signal resources according to the second parameter, and sends the set of first reference signal resources to the first node; wherein the set of first reference signal resources Including multiple reference signal resources with the same function;

sending, by the network device, first request signaling to the first node;

The network device configures a resource set based on the third parameter, and sends the resource set to the first node.

In this embodiment of the present application, the second parameter is the MIMO transmission parameter of the first node in the time division multiplexing mode, and the set of the first reference signal resources is the MIMO transmission with the first node in the time division multiplexing mode The SRS resource set corresponding to the parameter; the resource set is the SRS resource configured by the network device according to the third parameter. The network equipment configuration resource set and the set of the first reference signal resources are helpful for the first node to select the SRS resource most suitable for the current working mode, and use the configuration information in the selected SRS resource to transmit signals to the second node, Therefore, in the scenario of space division transmission and uplink full-duplex transmission, the self-interference of the IAB relay node and the technical problems of the limited MIMO transmission caused by the hardware problem of the IAB node equipment are solved.

The network device configures a set of first reference signal resources according to the second parameter; wherein, the set of first reference signal resources includes a plurality of reference signal resources with the same function;

sending, by the network device, first request signaling to the first node;

The network device configures a resource set based on the third parameter, and sends the resource set and the set of the first reference signal to the first node.

In this embodiment of the present application, the network device configuration resource set and the first reference signal resource set are helpful for the lower-level IAB node to select the corresponding SRS resource in the corresponding working mode, and use the configuration information in the SRS resource to transmit signals to the upper-level IAB node, thereby It solves the technical problems that the IAB relay node generates self-interference in the scenario of space division transmission and uplink full-duplex transmission, and the hardware problem of the IAB node equipment causes the MIMO transmission to be limited.

sending, by the network device, first request signaling to the first node;

In the embodiment of the present application, the network device configures the resource set, which is helpful for the first node to select the corresponding SRS resource in the corresponding working mode, and use the configuration information in the SRS resource to transmit signals to the second node, thereby solving the problem of space division transmission and uplink transmission. In the scenario of full-duplex transmission, the first node generates self-interference, and the hardware problem of the first node causes the technical problem that the MIMO transmission is limited.

In this embodiment of the present application, the resource set refers to a set of SRS resources configured by the network device for the first node, and the SRS resources configured by the network device are divided into two types: one is the resource set that is the resources of multiple reference signals. Set, the set of reference signal resources refers to the SRS resource set, the SRS resource set is the SRS resource configured by the network device, and each SRS resource set has one or more reference signal resources, and the reference signal resources refer to SRS resource. The network device is configured with multiple SRS resource sets corresponding to MIMO parameters in different working modes, which is beneficial for the first node to select the SRS resource set in the SRS resource set that is most suitable for the current working mode, and use the SRS resource set in the SRS resource set. The configuration information transmits signals to the second node, thereby solving the technical problems of self-interference generated by the first node and limited MIMO transmission caused by hardware problems of the first node in the scenarios of space division transmission and uplink full-duplex transmission.

The other is that the SRS resource refers to a set of reference signal resources, the set of reference signal resources refers to the SRS resource set, and the SRS resource set includes multiple reference signal resources, and the reference signal resource refers to the SRS resource, one or more SRS resources correspond to the same working mode, and the one or more SRS resources are SRS resources configured by the network device. The network device is configured with multiple SRS resources corresponding to the MIMO parameters in different working modes, which is beneficial for the lower-level IAB node to select the SRS resource most suitable for its working mode (one working mode may correspond to multiple SRS resources). SRS resource, and use the configuration information in the SRS resource to transmit signals to the second node, thus solving the problem that the first node generates self-interference in the scenario of space division transmission and uplink full-duplex transmission, and the hardware problem of the first node equipment causes MIMO Technical issues where transmission is restricted.

sending, by the network device, first indication information to the first node;

receiving, by the network device, a first reference signal sent by the first node using the first reference signal resource in the first resource set based on the first indication information;

The network device receives the first information reported by the first node; wherein the first information is used to indicate the unavailable TPMI in the different working modes.

In this embodiment of the present application, the first indication information is a scheduling signaling sent by the network device to the first node, and is used to instruct the first node to select a corresponding SRS resource to send an SRS signal to the network device; the first reference signal resource is: The SRS resource selected according to the scheduling signaling; the first reference signal is the SRS signal sent by the first node to the network device.

If the network device is the upper-level node of the first node, and when the first node transmits signals to the network device based on the codebook, the first node will send the unavailable TPMI to the network device after sending the SRS signal, and the TPMI of the TPMI will be sent to the network device. The role is used to indicate the precoding matrix. By sending the unavailable TPMI to the network device, the first node provides a reference when the network device selects the precoding matrix from the codebook, so that the network device can avoid those when using MIMO transmission for the first node when selecting the precoding matrix. , a precoding matrix that may cause problems such as strong interference.

The network device sends the second indication information and the first channel state reference signal to the first node;

receiving, by the network device, a second reference signal sent by the first node using the first channel state reference signal and second reference signal resources in the first resource set based on the second indication information;

The network device receives the second information reported by the first node; wherein the second information is used to indicate the unavailable SRI in the different working modes.

In this embodiment of the present application, the second indication information is a scheduling signaling sent by the network device to the first node, and is used to instruct the first node to select a corresponding SRS resource to send the SRS signal to the network device; the second reference signal resource is: The SRS resource selected according to the scheduling signaling; the first reference signal is the SRS signal sent by the first node to the network device; the first channel state reference signal is the CSI-RS signal.

If the network device is the upper-level node of the first node, the network device sends a scheduling signaling to the first node, which is used to let the first node send the SRS signal to the network device. When the network device transmits a signal, in addition to sending a scheduling signaling to the first node, the network device also sends a CSI-RS signal to the first node for the first node to estimate an uplink channel, thereby obtaining a precoding matrix. In addition, after sending the SRS signal, the first node will send the unavailable SRI to the network device, and the role of the SRI is to indicate the SRS resource. By sending the unavailable SRI to the network device, the first node can give the network device a reference when selecting the SRS resource, so that the network device can avoid those using MIMO transmission for the first node when selecting the SRS resource. SRS resource for problems such as strong interference.

In a third aspect, an embodiment of the present application provides a method for determining a transmission parameter, which is characterized by comprising:

The second node sends the first indication information to the first node;

receiving, by the second node, a first reference signal sent by the first node using the first reference signal resource in the first resource set based on the first indication information;

receiving, by the second node, the first information reported by the first node; wherein the first information is used to indicate the unavailable TPMI in the different working modes;

Wherein, the first node is a downstream node of the second node.

In this embodiment of the present application, the first indication information is scheduling signaling sent by the second node to the first node, and is used to instruct the first node to select a corresponding SRS resource to send an SRS signal to the second node; the first reference signal The resource is the SRS resource selected according to the scheduling signaling; the first reference signal is the SRS signal sent by the first node to the second node.

When the first node transmits a signal to the second node based on the codebook, the first node sends an unavailable TPMI to the second node after sending the SRS signal, and the function of the TPMI is to indicate the precoding matrix. By sending the unavailable TPMI to the second node, the first node can give the second node a reference when selecting a precoding matrix in the codebook, so that the second node can avoid those problems that may affect the first node when selecting a precoding matrix. When using MIMO transmission, a precoding matrix that may cause problems such as strong interference.

In a possible implementation manner, the first indication information includes indication information of the different working modes and indication information of an unavailable TPMI in the different working modes;

In the embodiment of this application, a port refers to an antenna port, abbreviated as a port, which is a logical port; the first indication information includes indication information of different working modes and indication information of unavailable TPMI under the different working modes. For the same TPMI, the precoding matrices indicated in the codebooks corresponding to different working modes may be different, and the indication information of the different working modes is used to indicate which working mode corresponds to the TPMI sent by the first node. codebook, avoiding the situation where one TPMI indicates precoding matrices in multiple codebooks.

In a possible implementation manner, before the second node sends the first indication information to the first node, the method further includes:

The second node receives the information of the first resource set sent by the network device.

In a fourth aspect, an embodiment of the present application provides a method for determining a transmission parameter, including:

The second node sends the second indication information and the first channel state reference signal to the first node;

receiving, by the second node, a second reference signal sent by the first node based on the second indication information using the first channel state reference signal and second reference signal resources in the first resource set;

receiving, by the second node, the second information reported by the first node; wherein the second information is used to indicate the unavailable SRI in the different working modes;

Wherein, the first node is a downstream node of the second node.

In this embodiment of the present application, the second indication information is scheduling signaling sent by the second node to the first node, and is used to instruct the first node to select a corresponding SRS resource to send an SRS signal to the second node; the second reference signal The resource is the SRS resource selected according to the scheduling signaling; the first reference signal is the SRS signal sent by the first node to the second node; the first channel state reference signal is the CSI-RS signal.

When the first node transmits signals to the second node in a non-codebook-based manner, the second node will not only send a scheduling signaling to the first node, but also send a CSI-RS signal to the first node for The first node estimates the uplink channel, thereby obtaining a precoding matrix. In addition, after sending the SRS signal, the first node will send the unavailable SRI to the second node, and the role of the SRI is to indicate the SRS resource. By sending the unavailable SRI to the second node, the first node can give the second node a reference when selecting the SRS resource, so that the second node can avoid those using MIMO transmission for the first node when selecting the SRS resource. SRS resource that may cause problems such as strong interference.

In the embodiment of this application, the port refers to an antenna port, referred to as a port, which is a logical port; the second indication information includes indication information of different working modes and indication information of unavailable SRIs under the different working modes. For the same SRI, if the working mode corresponding to the SRS resource is different, the indicated SRS resource may also be different. The indication information of the different working modes is used to indicate the SRS resource corresponding to which working mode the SRI sent by the first node corresponds to, avoiding the problem that one SRI indicates multiple SRS resources.

In a possible implementation manner, before the second node sends the second indication information and the first channel state reference signal to the first node, the method further includes:

In the embodiment of the present application, the information of the first resource set includes the information of the MIMO parameter reported by the first node and the information of the SRS resource configured by the network device. Before sending the scheduling signaling to the first node, the second node will accept the information of the first resource set sent by the network device, so that the second node can select resources such as SRS resource for the first node.

In a fifth aspect, an embodiment of the present application provides a device for determining transmission parameters, wherein the device for determining transmission parameters is a first node, including:

a reporting unit, used to report the MIMO parameters in different working modes to the network device;

A receiving unit, configured to receive a first resource set sent by the network device; wherein the first resource set includes reference signal resources corresponding to different working modes respectively.

In a possible implementation manner, the device for determining transmission parameters further includes:

a first indication information receiving unit, configured to receive the first indication information sent by the second node after the receiving unit receives the first resource set sent by the network device;

a first reference signal resource calling unit, configured to use the first reference signal resource in the first resource set based on the first indication information;

a first reference signal sending unit, configured to send a first reference signal to the second node;

The first information reporting unit is configured to report the first information to the second node; wherein the first information is used to indicate the unavailable TPMI in the different working modes.

In a possible implementation manner, the first reference signal resource invoking unit further includes:

A first reference signal resource selection unit, configured to select a first reference signal resource in the first resource set according to the first state information.

a second indication information receiving unit, configured to receive the second indication information sent by the second node;

a first channel state reference signal receiving unit, configured to receive the first channel state reference signal;

a first channel state reference signal calling unit, configured to use the first channel state reference signal;

a second reference signal resource calling unit, configured to use the second reference signal resource in the first resource set based on the second indication information;

The second information reporting unit is configured to report the second information to the second node; wherein the second information is used to indicate the unavailable SRI in the different working modes.

In a possible implementation manner, the second reference signal resource invoking unit further includes:

The second reference signal resource selection unit is configured to select the first reference signal resource in the first resource set according to the second state information.

In a sixth aspect, an embodiment of the present application provides an apparatus for determining transmission parameters, wherein the apparatus for determining transmission parameters is a network device, including:

a receiving unit, configured to receive MIMO parameters in different working modes reported by the first node;

a resource configuration unit, used to configure the first resource set;

A sending unit, configured to send the first resource set to the first node; wherein the first resource set includes reference signal resources corresponding to different working modes respectively.

In a possible implementation manner, the resource configuration unit further includes:

an identification configuration unit, configured to respectively configure corresponding identifications for the sets of multiple reference signal resources in the first resource set if the first resource set is a set of multiple reference signal resources;

If the first resource set is a set of reference signal resources, corresponding identifiers are respectively configured for multiple reference signal resources in the first resource set.

An information sending unit, configured to send the information of the first resource set to the second node after the resource configuration unit configures the first resource set.

In a seventh aspect, an embodiment of the present application provides a device for determining transmission parameters, wherein the device for determining transmission parameters is a second node, including:

a first indication information sending unit, configured to send the first indication information to the first node;

a first reference signal receiving unit, configured to receive a first reference signal sent by the first node using the first reference signal resource in the first resource set based on the first indication information;

A first information receiving unit, configured to receive the first information reported by the first node; wherein the first information is used to indicate the unavailable TPMI in the different working modes.

An information receiving unit, configured to receive the information of the first resource set sent by the network device.

In an eighth aspect, an embodiment of the present application provides a device for determining transmission parameters, wherein the device for determining transmission parameters is a second node, including:

a second indication information sending unit, configured to send the second indication information to the first node;

a first channel state reference signal sending unit, configured to send the first channel state reference signal to the first node;

The second reference signal receiving unit is configured to receive the second reference signal sent by the first node based on the second indication information using the first channel state reference signal and the second reference signal resources in the first resource set. reference signal;

The second information receiving unit is configured to receive the second information reported by the first node; wherein the second information is used to indicate the unavailable SRI in the different working modes.

In a ninth aspect, an embodiment of the present application provides an apparatus for determining transmission parameters, including a processor and a memory;

The memory is used for storing program codes, and the processor is used for calling the program codes stored in the memory to execute the method for determining transmission parameters in the first aspect and various possible implementation manners thereof.

In a tenth aspect, an embodiment of the present application provides an apparatus for determining transmission parameters, including a processor and a memory;

Wherein, the memory is used for storing program codes, and the processor is used for calling the program codes stored in the memory to execute the method for determining transmission parameters in the second aspect and various possible implementation manners thereof.

In an eleventh aspect, an embodiment of the present application provides an apparatus for determining transmission parameters, including a processor and a memory;

Wherein, the memory is used to store program codes, and the processor is used to call the program codes stored in the memory to execute the methods for determining transmission parameters in the third aspect and the fourth aspect and various possible implementation manners thereof.

In a twelfth aspect, an embodiment of the present application provides a computer-readable storage medium, where the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, enables a first node to implement the first aspect and the The method for determining transmission parameters in various possible implementations thereof, or the method for determining transmission parameters in the above-mentioned second aspect and various possible implementations by the network device, or the second node implementing the above-mentioned third aspect and the first. Methods for determining transmission parameters in the four aspects and various possible implementations thereof.

In a thirteenth aspect, embodiments of the present application provide a computer program, where the computer program includes instructions, when the computer program is executed by a computer, so that the first node can execute the above-mentioned first aspect and various possible implementation manners thereof The process performed by the first node or the network device may perform the process performed by the network device in the second aspect and its various possible implementations, or the second node may perform the third aspect and the fourth aspect and Processes executed by the second node in various possible implementation manners thereof.

In a fourteenth aspect, an embodiment of the present application provides a chip system, where the chip system includes a processor configured to support the first node to implement the functions involved in the methods in the first aspect and its various possible manners, or network devices The functions involved in the method in the second aspect and its various possible manners are implemented, or the second node implements the functions involved in the methods in the third aspect and the fourth aspect and the methods in its various possible manners.

In a possible design, the chip system further includes a memory for storing necessary program instructions and data of the first node or the network device or the second node. The chip system may be composed of chips, or may include chips and other discrete devices.

Description of drawings

FIG. 1 is a schematic diagram of data flow mapping on a single panel of an antenna provided by an embodiment of the present application;

FIG. 2 is a schematic diagram of an antenna multi-panel data stream mapping provided by an embodiment of the present application;

FIG. 3 is a schematic diagram of a system architecture for backhaul parameter transmission provided by an embodiment of the present application;

4 is a flowchart of a MIMO codebook-based uplink transmission method provided by an embodiment of the present application;

5 is a schematic diagram of a codebook provided by an embodiment of the present application;

6 is a schematic diagram of an SRS resource provided by an embodiment of the present application;

7 is a flowchart of a MIMO non-codebook-based uplink transmission provided by an embodiment of the present application;

FIG. 8 is an architecture diagram of a signal transmission system of a MIMO uplink provided by this embodiment;

9 is a structural diagram of an IAB node device provided by an embodiment of the present application;

10 is a flowchart of another MIMO codebook-based uplink transmission method provided by an embodiment of the present application;

11 is a flowchart of another MIMO codebook-based uplink transmission method provided by an embodiment of the present application;

12 is a flowchart of another MIMO non-codebook-based uplink transmission method provided by an embodiment of the present application;

FIG. 13 is a transmission flowchart of a MIMO uplink provided by an embodiment of the present application;

14 is a schematic structural diagram of an apparatus for determining transmission parameters provided by an embodiment of the present application;

FIG. 15 is a schematic structural diagram of an apparatus for determining transmission parameters provided by an embodiment of the present application;

16 is a schematic structural diagram of an apparatus for determining transmission parameters provided by an embodiment of the present application;

17 is a schematic structural diagram of an apparatus for determining transmission parameters provided by an embodiment of the present application;

18 is a schematic structural diagram of an apparatus for determining transmission parameters provided by an embodiment of the present application;

FIG. 19 is a schematic structural diagram of an apparatus for determining transmission parameters provided by an embodiment of the present application;

FIG. 20 is a schematic structural diagram of an apparatus for determining transmission parameters provided by an embodiment of the present application;

FIG. 21 is a schematic structural diagram of an apparatus for determining transmission parameters provided by an embodiment of the present application.

Detailed ways

The embodiments of the present application will be described below with reference to the accompanying drawings in the embodiments of the present application.

Obviously, the described embodiments are only a part of the embodiments of the present application, but not all of the embodiments. Reference herein to an "embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present embodiment application. The appearances of this phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are they separate or alternative embodiments that are mutually exclusive with other embodiments. Those skilled in the art will understand, both explicitly and implicitly, that the embodiments described herein may be combined with other embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

The terms "first", "second", "third", etc. in the description and claims of the present application and the drawings are used to distinguish different objects, and are not used to describe a specific order. Furthermore, the terms "comprising" and "having", and any variations thereof, are intended to cover non-exclusive inclusion. For example, a series of steps or units are included, or optionally, steps or units not listed, or optionally other steps or units inherent to the process, method, product, or apparatus are included.

The drawings show only some but not all of the content related to the present application. Before discussing the exemplary embodiments in greater detail, it should be mentioned that some of the exemplary embodiments are described as processes or methods depicted as flowcharts. Although a flowchart depicts various operations (or steps) as a sequential process, many of the operations may be performed in parallel, concurrently, or concurrently. Additionally, the order of operations can be rearranged. The process may be terminated when its operation is complete, but may also have additional steps not included in the figures. The processes may correspond to methods, functions, procedures, subroutines, subroutines, and the like.

The terms "component," "module," "system," "unit," etc. used in this specification are used to refer to a computer-related entity, hardware, firmware, a combination of hardware and software, software, or software in execution. For example, an element may be, but is not limited to, a process running on a processor, a processor, an object, an executable, a thread of execution, a program, and/or distributed between two or more computers. In addition, these units can execute from various computer readable media having various data structures stored thereon. A unit may, for example, be based on a signal with one or more data packets (eg, data from a second unit interacting with another unit between local systems, distributed systems, and/or networks. For example, the Internet interacting with other systems via signals) Communicate through local and/or remote processes.

First, some terms in the embodiments of the present application are explained so as to be understood by those skilled in the art.

(1) The Physical Uplink Share Channel (PUSCH) is used to carry data from the transmission channel (Uplink Shared Channel, USCH). The so-called sharing means that the same physical channel can be used by multiple users in time-sharing, or the channel have a shorter duration.

(2) In-band relay. In-band relay is a relay scheme in which the backhaul link and the access link share the same frequency band. Since no additional spectrum resources are used, in-band relay has high spectral efficiency and low deployment cost. and other advantages, in-band relays generally have half-duplex constraints.

(3) Integrated Access and Backhaul (IAB), the in-band relay scheme of NR is called Integrated Access and Backhaul (IAB), and the relay node is called IAB node. When the IAB node is working normally, the access link and the backhaul link perform resource multiplexing by time division, space division or frequency division. Taking a time division multiplexing (TDM) scenario as an example, the backhaul link and the access link work at different times, so the IAB node needs to switch between the transmission and reception of the backhaul link and the transmission and reception of the access link. When the backhaul and access links are switched without interval, that is, when the symbols of the access link and the symbol backhaul link are consecutive, the IAB node has the highest resource utilization rate. However, in implementation, due to various factors such as switching time of the power amplifier, transmission distance, and non-ideal synchronization, the backhaul link and the access link cannot be switched without interval. At this point, the IAB node needs to determine the set of available/unavailable symbols for the backhaul link and the access link. The IAB node receives the configuration information of the network device, which may be received by the MT of the IAB node or by the DU of the IAB node. Exemplarily, the configuration information received by the IAB node MT is carried by RRC signaling, and the configuration information received by the IAB node DU is carried by F1-AP interface signaling. Generally speaking, the lower-level IAB node receives the configuration sent by the network device for sending, such as SRS resource and SRS resource set configuration, which is realized by the IAB MT receiving RRC signaling; the upper-level IAB node receives the transmission from the network device and is used to receive the lower The configuration of the signal sent by the node or the configuration information used to schedule the subordinate node is realized by the IAB DU receiving the F1-AP interface signaling.

(4) Sounding Reference Signal (SRS), which is used to estimate uplink channel frequency domain information for frequency selective scheduling.

(5) Downlink Control Information (DCI), carried by the Downlink Physical Control Channel (PDCCH), the downlink control information sent by the base station to the terminal, including transmission format, resource allocation, HARQ information, power control Wait.

(6) Channel State Information-Reference Signal (CSI-RS), which is mainly used to obtain channel state information in the 5G NR system for scheduling, link adaptation, and MIMO-related transmission settings; It is used for beam management, and the acquisition of beam shaping weights at the terminal and base station sides is used to support the beam management process.

(7) Transmitted Precoding Matrix Indicator (TPMI) is used to indicate the precoding matrix in the codebook.

(8) Sounding Reference Signal Resource Indicator (SRS Resource Indicator, SRI), used to indicate the SRS resource in the SRS resource set.

The network equipment described in the claims and description of the present application refers to equipment such as base stations that can realize wireless signal transmission between wired communication networks and wireless terminals or relay nodes; wherein the base stations also include host base stations.

Please refer to FIG. 1. FIG. 1 is a schematic diagram of data flow mapping on a single panel of an antenna provided by an embodiment of the present application. The panel generally refers to the antenna panel panel. In practice, the directivity of a single antenna is limited. In order to be suitable for applications in various occasions, two or more single antennas operating at the same frequency will be used according to certain It is required to carry out feeding and spatial arrangement to form an antenna array. The antenna radiating element that constitutes the antenna array is called an array element, and there are multiple antenna array elements on one panel. In practical applications, base stations and terminals use panels to improve their electromagnetic wave transmission capabilities.

In a MIMO system, the upper-layer service streams are channel-coded to form codewords, which are used to distinguish different data streams, so that MIMO can transmit multiple data streams and realize spatial multiplexing. But in general, the number of codewords is inconsistent with the number of transmitting antennas, and the codeword stream needs to be mapped to different transmitting antennas, so layer mapping and precoding need to be used. Layer mapping and precoding are actually "mapping codewords to transmitting antennas" Two sub-processes of the "Antenna" process.

Layer mapping is to remap the codeword stream to multiple layers according to certain rules (there is only one layer in Figure 1), and then map the data stream on the layer to the logical ports AP0~AP3 of the antenna through precoding. OFDM signals are generated, and then the OFDM symbols are mapped one-to-one to the antenna elements through the respective transceiver units TXRU.

In Figure 1, it is the transmission of data from one layer to four antenna ports AP0-AP3, wherein the antenna ports AP0-AP3 are logical ports. If the port of the antenna corresponds to the same panel, and there is no delay between the ports of the antenna, coherent transmission (joint precoding) can be performed, that is, the layer can map the data stream to the data stream on the same panel through the precoding matrix. The antenna port is connected to the port, and corresponding weights are assigned to the OFDM signal on the port. In this way, when MIMO is used to transmit signals to the upper node, the strength of the transmitted signal can be enhanced and the transmission efficiency can be improved.

Please refer to FIG. 2. FIG. 2 is a schematic diagram of data flow mapping of an antenna multi-panel provided by an embodiment of the present application. Figure 2 shows the transmission of a layer mapping data stream to four ports. In practical applications, the terminal often has multiple antenna panels, which can be configured at different positions of the terminal, so that the signal has more diversity in transmission time and transmission space. One aspect of this design is that there are multiple antenna panels, giving the terminal more space options for transmitting signals. For example, when a user uses a smartphone to make a call, the user's palm covers an antenna panel installed on the smartphone, which affects the antenna's transmission of signals. If the antenna panel is also installed at other locations on the smartphone, the smartphone can pass The antenna panel transmits the signal so that the quality of the communication is not affected. On the other hand, the terminal has a beamforming design, that is, by adjusting the phase between multiple antennas, the communication signals are concentrated in a certain direction, and the strength of the signal received by the base station in a certain direction is enlarged. However, in this way, the coverage of the signal is often insufficient. Therefore, through the multi-panel design, the terminals can be in different locations and transmit signals in different directions, reducing the problem of insufficient spatial coverage caused by beamforming. .

In Figure 2, different antenna ports can be transmitted on different panels, logical ports port AP0 and port AP2 are on panel 1, and logical ports port AP1 and port AP3 are on panel 2. One logical port port of an antenna corresponds to multiple physical antennas, and the signal transmitted by the antenna corresponding to one logical port port only has an offset in phase, and other characteristics are the same. In addition, when the signal is transmitted between different panels, the transmission delay between the panels is caused by hardware reasons. Therefore, the antenna logical port ports between different panels cannot be coherently transmitted, that is, cannot be jointly precoded. In Figure 2, the codeword stream is mapped to a layer through layer mapping. Since Figure 2 is a multi-panel, the layer maps the data stream to the antenna logical port ports AP0~AP3 through two precoding, and then The OFDM signal is generated by digital beamforming and mapping of resource particles, and the generated OFDM signal is sent to the transceiver unit TXRU, and the transceiver unit performs analog beamforming on the OFDM signal received by the transceiver unit, that is, the logic is given by the precoding matrix. The weight of the OFDM signal on the port, the phase shifter is used to complete the adjustment of the antenna phase, and then the signal is transmitted.

Referring to FIG. 3 , FIG. 3 is a schematic diagram of a system architecture for backhaul parameter transmission provided by an embodiment of the present application. IAB is divided into a mobile terminal MT (Mobile-Termination, MT) module and a distributed unit DU (Distributed Unit, DU) module: The function of the MT module is defined as a UE-like component, which can be understood as the IAB node accesses the upper level through the MT Node/Network. The DU function is relative to the centralized unit CU (Centralized Unit, CU) function. In 5G NR, the base station function is divided into two parts called CU-DU separation. From the perspective of the protocol stack, the CU includes the RRC layer and the PDCP layer of the original LTE base station, and the DU includes the RLC layer, the MAC layer, and the PHY physical layer. In the deployment of ordinary 5G base stations, CU and DU can be physically connected by optical fiber, and there is a specially defined F1 interface logically for communication between CU and DU. From a functional point of view, CU is mainly responsible for radio resource control and configuration, cross-cell mobility management, bearer management, etc.; DU is mainly responsible for scheduling resources configured by CU, and generating and sending physical signals.

As shown in Figure 3, the second node is the upper-level node of the first node. Before the first node uses MIMO to transmit signals to the second node, the MT of the first node should report the MIMO parameters in the time division multiplexing mode to the second node. the data package. The DU of the second node receives the data packet of the MIMO parameter reported by the MT of the first node, and sends the data packet of the MIMO parameter to the CU of the second node through the F1 interface. The CU of the second node configures an SRS resource set corresponding to the time division multiplexing mode according to the MIMO parameters, and then sends the data packet of the SRS resource set to the DU of the second node through the F1 interface. The DU of the second node passes the data packets of the SRS resource set configured by the CU of the second node through the air interface (in a mobile communication network, the air interface is the interface between the base station and the mobile terminal, and the communication between the mobile phone or the wireless modem and the base station is the interface between the base station and the mobile terminal. interface) to the MT of the first node. After the MT of the first node receives the data packet of the SRS resource set, it is processed at the MT adaptation layer of the second node, and the processed data packet is forwarded to the DU module of the second node for processing, and finally passes through the DU module. Parse out the data packet of the SRS resource set. The second node sends an indication message to the first node through its DU module, where the indication message is used to instruct the first node to send an SRS signal to the second node. After receiving the indication information, the MT of the first node sends the processed indication information to the DU of the first node through the F1 interface, and parses it. The MT of the first node selects a corresponding SRS resource in the SRS resource set according to the parsed indication information, and sends an SRS signal to the second node according to the configuration information in the selected SRS resource. After receiving the SRS signal, the DU of the second node parses the SRS signal, and sends the parsed information to the CU of the second node through the F1 interface. The information of the signal generates control information, the control information is used to instruct the MT of the first node to select the corresponding SRS resource, the DU of the second node sends the control information to the MT of the first node, and the MT of the first node is based on the control The information selects the corresponding SRS resource, and transmits a signal to the DU of the second node according to the configuration information and the precoding matrix in the selected SRS resource.

Referring to FIG. 4, FIG. 4 is a flowchart of a MIMO codebook-based uplink transmission method provided by an embodiment of the present application. In mobile communication, several precoding matrices can be used to form a codebook, and the content of this codebook is known by both the UE and the gNB (base station). The protocol defines a variety of codebooks, and a codebook is a collection of multiple precoding matrices, which can support UEs with various hardware conditions to perform uplink transmission in various scenarios. For example, there are three main relationships between the MIMO antenna ports of the UE, namely: all antenna ports are non-coherent (Non coherence), some antenna ports are coherent (Partical coherence), and all antenna ports are coherent (Full coherence). As shown in FIG. 5 , FIG. 5 lists the codebooks defined by some protocols and the relationship of the corresponding transmission schemes implicitly behind them. In Figure 5, if the relationship between the MIMO antenna ports of the UE is Non coherence, then the gNB can only select a precoding matrix with TPMI 0; if the relationship between the MIMO antenna ports of the UE is Partical coherence, then the gNB can choose from If the TPMI is 0~2, the precoding matrix suitable for UE MIMO uplink transmission data is selected; if the relationship between the MIMO antenna ports of the UE is Full coherence, then the gNB can select the suitable UE MIMO from TPMI 0~4. Precoding matrix for uplink transmission data. Then, after the UE reports the relationship between the antenna ports to the gNB, the gNB can determine the range of the corresponding precoding matrix, thereby narrowing the range of the precoding matrix selected by the gNB.

When the gNB receives the SRS signal sent by the terminal, it can estimate the uplink channel and obtain the information of the uplink channel. Based on the information of the uplink channel and the MIMO parameters reported by the terminal, the gNB can select the appropriate precoding matrix from the codebook for the terminal, and Relevant information such as the precoding matrix is sent to the terminal, and the terminal performs uplink data transmission according to the instruction of the information sent by the gNB. As shown in Figure 4, the process of uplink transmission in UE's MIMO based on a codebook is as follows:

Step S401: The UE reports a set of MIMO parameters to the gNB.

Specifically, before the UE transmits the uplink signal to the gNB using MIMO, it needs to report its MIMO parameters to the gNB. The MIMO parameters specifically include: the number of available ports of the antenna, the relationship between the antenna ports, and information such as available panels. Generally, the MIMO parameters reported by the UE to the gNB are the MIMO parameters when the UE is in a time division multiplexing mode. The UE reports MIMO parameters to the gNB, so that the gNB can know its MIMO related information, configure SRS resources for the UE according to its MIMO parameters, and schedule the codebook required by the UE for uplink transmission.

Step S402: The gNB configures SRS resources according to the MIMO parameters reported by the UE, and sends the configured SRS resources to the UE.

Specifically, after receiving the MIMO parameters sent by the UE, the gNB configures SRS resources for the UE. The SRS resource is an SRS resource set. The SRS resource set is a collection of multiple SRS resources. Since the UE has multiple panels, or the signals are transmitted in multiple directions after beamforming, there may be multiple SRS resources in one SRS resource set. In terms of physical meaning, an SRS resource set can be regarded as a functional unit. This functional unit can only have one purpose of use. Multiple SRS resources in an SRS resource set have the same purpose of use. For the SRS resource in the codebook-based transmission method, the number of ports configured by the SRS resource in an SRS resource set is the same. When multiple SRS resources exist in an SRS resource set, an SRI is configured for each SRS resource, which is used by the gNB to indicate which SRS resource the UE should use.

In addition, the SRS resource is actually a configured time-frequency resource. As shown in FIG. 6, FIG. 6 is a structural diagram of an SRS resource provided by an embodiment of the present application. When the purpose of use of the SRS resource set is codebook-based uplink transmission, only two SRS resources can be configured at most. The resource can be configured with up to 4 antenna ports. In the 5G NR system, the configuration of the SRS resource includes:

(1) Number of antenna ports: NR SRS can be configured with up to 4 antenna ports;

(2) Number of OFDM symbols: NR SRS can be configured with up to 4 OFDM symbols;

(3) Time domain location: NR SRS can be located in 1, 2, and 4 consecutive symbols in the last 6 symbols in a slot time slot;

(4) Frequency domain location: The frequency domain location of the NR SRS is related to the partial bandwidth of the UE.

Step S403: the gNB sends indication information to the UE.

Specifically, before sending the SRS signal to the gNB, the UE will receive an indication message sent by the gNB, where the indication message includes one or more SRIs. The role of the SRI is to instruct the UE to use a certain SRS resource in the SRS resource set. As described in step S402, since signals are transmitted in multiple directions after the UE beamforming, and the UE is installed with multiple panels, there may be multiple SRS resources in one SRS resource set. When there may be multiple SRS resources in an SRS resource set, the gNB may only send one SRI to instruct the UE to call the SRS resource corresponding to the SRI, and the UE sends a sounding signal to the gNB based on the SRS resource; or , the gNB may also send multiple SRIs to instruct the UE to invoke multiple SRS resources corresponding to the multiple SRIs, and the UE sends SRS signals to the gNB respectively based on the multiple SRS resources.

Step S404: The UE receives the indication information sent by the gNB, and uses the selected SRS resource to send an SRS signal to the gNB.

Specifically, after the UE receives the indication information sent by the gNB, the UE selects a corresponding SRS resource in the SRS resource set according to the SRI in the indication information, and sends an SRS signal to the gNB based on the configuration information in the SRS resource. As described in step S403, there may be one or multiple SRIs in the indication information. When there are multiple SRIs in the indication information, the UE selects the SRS resource corresponding to the SRI from the SRS resource set, respectively, And based on the configuration information in the selected SRS resource, the SRS signal is respectively sent to the gNB, for example, the SRS signal is sent to the gNB according to the port configured in the selected SRS resource.

Step S405: The gNB generates a DCI signal according to the SRS signal and MIMO parameters sent by the UE, and sends the DCI signal to the UE.

Specifically, the gNB obtains the status information of the uplink channel according to the SRS signal sent by the UE, and the gNB selects a prediction suitable for the UE MIMO uplink transmission data from the codebook by analyzing the status information of the uplink channel and the MIMO parameters reported by the UE. encoding matrix. According to the multi-channel SRS signal sent by the UE (multiple ports may be configured in the SRS resource selected by the UE), the number Rank of the ports that call the UE is determined. In addition, when the indication information sent by the gNB contains multiple SRIs, the gNB will receive multiple SRS signals. In this case, the gNB will also select a suitable UE based on the status information of the uplink channel and the MIMO parameters reported by the UE. SRS resource for MIMO uplink transmission data.

The gNB sends information such as the TPMI of the selected precoding matrix, the indication information RI of the Rank, and the SRI of the SRS resource to the UE through a DCI signal. The TPMI is used to instruct the UE to use the precoding matrix selected by the gNB, the RI is used to indicate which ports the UE uses to transmit the SRS signal, and the SRI is used to instruct the UE to invoke the SRS resource selected by the gNB.

Step S406: The UE receives the DCI signal, and transmits the signal through the uplink using MIMO based on the DCI signal.

Specifically, after the UE receives the DCI signal, it transmits the uplink signal through the information in the DCI signal. The specific process is as follows: the UE selects the corresponding SRS resource in the SRS resource set through the SRI in the DCI signal; The TPMI selects the corresponding precoding matrix in the codebook. The UE assigns the corresponding weight to the signal to be sent by the precoding matrix it selects, and sends the signal to the gNB based on the configuration information (such as the configured port) in the SRS resource.

This embodiment introduces a MIMO codebook-based uplink transmission method. The UE first reports its corresponding MIMO parameters in the time division multiplexing mode to the gNB, so that the gNB configures the corresponding SRS resources according to the reported MIMO parameters, that is, the gNB configuration An SRS resource set, an SRS resource set contains one or more SRS resources with the same function. The gNB sends the configured SRS resource set to the UE, and then sends an indication message for the UE to send the SRS signal to the gNB. After receiving the indication information, the UE selects a corresponding SRS resource from the SRS resource set according to the SRI in the indication information, and sends an SRS signal to the gNB according to the configuration information in the selected SRS resource. The gNB can obtain the information of the uplink channel through the SRS signal, and select the appropriate precoding matrix from the codebook for the UE based on the information of the uplink channel and the MIMO parameters reported by the UE, determine the Rank, and SRI and other information, and pass this information through the DCI The signal is sent downlink to the UE. After receiving the DCI signal, the UE sends the signal to the gNB according to the TPMI, SRI and other information therein. The UE uses MIMO to transmit uplink signals by means of a codebook, which can reduce the influence of interference caused by the signals in the uplink transmission process, and greatly improve the capacity of the MIMO system.

Referring to FIG. 7 , FIG. 7 is a flowchart of MIMO non-codebook-based uplink transmission provided by an embodiment of the present application. The method of MIMO non-codebook-based uplink transmission is: UE no longer transmits uplink signals according to the codebook defined by the protocol, but calculates the precoding matrix according to the relevant CSI-RS, so as to adjust the weight of the uplink channel. value. As shown in Figure 7, the process of using MIMO for the UE to perform uplink transmission based on the non-codebook mode is as follows:

Step S701: The UE reports a set of MIMO parameters to the gNB.

Specifically, before using MIMO to transmit signals to the gNB in a non-codebook manner, the UE shall report its corresponding MIMO parameters in the time division multiplexing mode to the gNB. The MIMO parameters specifically include: the number of available ports of the antenna, the relationship between the antenna ports, and information such as available panels. The UE transmits the MIMO parameters to the gNB so that the gNB can know the relevant information of the MIMO parameters of the UE, and then configures the relevant SRS resources for the UE.

Step S702: The gNB configures SRS resources and CSI-RS signals according to the MIMO parameters reported by the UE, and sends the configured SRS resources and CSI-RS signals to the UE.

After receiving the MIMO parameters sent by the UE, the gNB configures SRS resources for the UE. The SRS resource is an SRS resource set. The SRS resource set is a collection of multiple SRS resources. Since the UE has multiple panels, or the signals are transmitted in multiple directions after beamforming, there may be multiple SRS resources in one SRS resource set. In terms of physical meaning, an SRS resource set can be regarded as a functional unit. This functional unit can only have one purpose of use. Multiple SRS resources in an SRS resource set have the same purpose of use. When the SRS resource set is used for non-codebook-based uplink transmission, one SRS resource set contains at most four SRS resources, and each SRS resource can only be configured with one port. The gNB uses the SRS resource set as the unit to configure the corresponding CSI-RS signal. The role of the CSI-RS signal is to allow the UE to estimate the downlink channel. When multiple SRS resources exist in an SRS resource set, an SRI is configured for each SRS resource, which is used by the gNB to indicate which SRS resource the UE should use.

The gNB sends its configured SRS resource and CSI-RS to the UE.

Step S703: the gNB sends indication information to the UE.

Specifically, before sending the SRS signal to the gNB, the UE will receive an indication message sent by the gNB, and the indication message includes the SRI corresponding to all the SRS resources in the SRS resource set. The role of the SRI is to instruct the UE to use the SRS resource in the SRS resource set. As described in step S702, since signals are transmitted in multiple directions after the UE beamforming, and the UE is installed with multiple panels, there may be multiple SRS resources in one SRS resource set.

Step S704: The UE estimates the downlink channel according to the received CSI-RS signal, obtains the downlink channel matrix, determines the information of the uplink channel matrix according to the downlink channel matrix, and obtains a precoding matrix H by performing operation processing on the uplink channel matrix.

Specifically, after receiving the CSI-RS signal, the UE estimates the downlink channel, obtains the information of the downlink channel, and obtains a downlink channel matrix according to the obtained information of the downlink channel. AP3 sends a CSI-RS signal to the UE, and there are four antenna ports BP0-BP3 on the UE side to receive the CSI-RS signal. Then a 4x4 downlink channel matrix can be obtained:

After obtaining the downlink channel matrix, the UE can obtain the uplink channel matrix according to the obtained downlink channel matrix. It is assumed that the uplink channel matrix and the downlink channel matrix are in a transposed relationship, that is:

Then the upstream channel matrix is:

The UE converts the uplink channel matrix

After arithmetic processing, such as eigenvalue decomposition (SVD decomposition), the weight of the SRS sent by the UE uplink is calculated, and a precoding matrix H is obtained. The calculation process of the SRS weight is as follows:

Each element in the above precoding matrix represents the weight of the SRS uplink transmission. Taking element d ₁₂ as an example, d ₁₂ represents that if port1 of the UE sends SRS to the gNB, port2 of the gNB receives the SRS, and the UE gives the SRS when sending the SRS. The weight of the SRS is d ₁₂ .

Step S705: The UE receives the indication information sent by the gNB, and sends an SRS signal to the gNB based on the SRS resource and the precoding matrix H.

Specifically, after receiving the indication information sent by the gNB, the UE selects the corresponding SRS resource in the SRS resource set according to the SRI of the UE in the indication information, and sends the SRS signal to the gNB respectively based on the configuration port in the SRS resource. In addition, before sending the SRS signal to the gNB, the UE will assign a corresponding weight to the SRS signal to be sent based on the precoding matrix H.

Step S706: The gNB generates a DCI signal based on the SRS signal and MIMO parameters sent by the UE, and sends the DCI signal to the UE.

Specifically, the gNB obtains the status information of the uplink channel according to the multi-channel SRS signals sent by the UE, and the gNB determines the incoherent multi-channel SRS signals by analyzing the status information of the uplink channel and the MIMO parameters reported by the UE, and calculates the MIMO channel matrix (The rank of the channel matrix represents the number of incoherent signals in the multi-channel signals sent by the UE to the gNB), and the number of DMRS ports to call the UE is determined according to the status of the uplink channel. In this embodiment, the channel corresponding to the antenna 1 that transmits the SRS is not ideal, the noise or interference is large, and it is not suitable for uplink transmission. Therefore, the gNB only schedules ports 0, 2, and 3, that is, SRI=0, 2, 3 ; DMRS port indicator = 0, 2, 3. At this point, the precoding matrix invoked by the UE is:

The gNB sends the RI of the rank of the channel matrix, the RI of the SRS resource, the DMRS port indictor and other information to the UE through a DCI signal. Among them, RI is used to indicate the effective data layer number of the MIMO channel, SRI is used to indicate that the UE invokes the SRS resource selected by the gNB, and the DMRS port indicator is used to indicate the DMRS port.

Step S707: The UE receives the DCI signal, and transmits the signal through the uplink using MIMO according to the DCI signal and the precoding matrix H.

Specifically, after receiving the DCI signal, the UE sends an uplink signal to the gUE by using the information in the DCI signal and using the precoding matrix and the corresponding port.

In this embodiment, before using MIMO to send an uplink signal to the gNB, the UE needs to report its MIMO parameters to the gNB. The gNB configures corresponding SRS resources and CSI-RS signals for the UE according to the reported MIMO parameters. Different from the codebook-based transmission method of MIMO, in the non-codebook-based method for uplink signal transmission, the UE needs to estimate the downlink channel according to the CSI-RS signal configured by the gNB, and according to the difference between the downlink channel and the uplink channel. The uplink channel is determined by the relationship, the information of the channel matrix of the uplink channel is obtained, and the precoding matrix is calculated according to the channel matrix of the uplink channel. After receiving the indication information of the gNB, the UE selects the SRS resource indicated by the indication information, assigns the corresponding weight to the SRS signal to be sent based on the precoding matrix, and assigns the weighted value based on the port and other information configured in the selected SRS resource. The SRS signal is sent to the gNB. The gNB obtains the information of the uplink channel through the SRS signal, calls the antenna port of the UE based on the information of the uplink channel and MIMO parameters, and sends the information such as SRI, RI, and DMRS port indicator to the UE through the DCI signal. The UE transmits the uplink signal through MIMO through the indication in the DCI signal. MIMO performs uplink signal transmission based on a non-codebook, and the UE can obtain a precoding matrix according to the CSI-RS signal, which gives the UE great flexibility.

Compared with the embodiments in FIG. 4 and FIG. 7 , before the UE transmits signals to the network device using MIMO, it can only report one set of MIMO parameters to the network device. The embodiment of the present application provides another method of MIMO uplink signal transmission. The method is shown in FIG. 8 , which is an architectural diagram of a MIMO uplink signal transmission system provided in this embodiment. The system architecture includes a network device, a first node, a second node, and two terminal devices UE, wherein the first node and the second node may be an IAB relay node, and the second node is an upper-level node of the first node. FIG. 8 takes two IAB relay nodes and two UEs as examples for description. In the following, this embodiment is described by taking the network device as the base station, the first node as the IAB node 1, and the second node as the IAB node 2 as an example.

The process of IAB node 1 using the MIMO technology to perform uplink signal transmission to its superior node IAB node 1 is as follows:

1. Before the IAB node 2 uses MIMO for uplink signal transmission, it reports multiple sets of MIMO parameters in different working modes to the base station respectively.

2. The base station configures the first resource set according to the multiple sets of MIMO parameters it receives, and sends the configured first resource set to the IAB node 1; the base station also configures the related information of the first resource set and/or the IAB The information of the multiple sets of MIMO parameters reported by the node 1 is sent to the IAB node 2.

3. The IAB node 2 sends indication information to the IAB node 1 to instruct the IAB node 1 to send the SRS signal to it.

4. The state information sent by the IAB node 1 selects the corresponding SRS resource from the first resource set, and selects the corresponding SRS resource from the selected SRS resource according to the indication information, and then according to the configuration in the selected SRS resource The information sends the SRS signal to the IAB node 2.

5. The IAB node 2 generates a DCI signal according to the SRS signal sent by the IAB node 1 and the information of the multiple sets of MIMO parameters reported by the IAB node 1, which is used to instruct the IAB node 1 to transmit signals to the IAB node 2 using MIMO.

6. The IAB node 1 receives the DCI signal, and uses MIMO to transmit the signal to the IAB node 2 according to the indication information in the DCI signal.

In this embodiment, before the lower-level IAB node transmits signals to the upper-level IAB node through MIMO, it must first report multiple sets of MIMO parameters in different working modes to the base station, and the base station configures corresponding SRS resources according to the reported multiple sets of MIMO parameters. The SRS resource is then sent to the subordinate IAB node. When the lower-level IAB node wants to transmit a signal to the upper-level IAB node through MIMO, the lower-level IAB node can select the corresponding SRS resource according to the different working modes it is currently in, and transmit the signal based on the selected SRS resource; When the IAB node needs to schedule the lower-level IAB node to perform uplink transmission through MIMO, the upper-level IAB node can generate a DCI signal according to the different working modes it is currently in, and instruct the lower-level IAB node to perform MIMO transmission parameters.

The structure of the IAB node in this embodiment is shown in FIG. 9 , which is a structural diagram of an IAB node device provided by an embodiment of the present application. As shown in FIG. 9 , the IAB node device includes two functional modules, DU and MT, where the MT is the UE functional module of the IAB node device, that is, the IAB node communicates with the upper-level node through the MT. The DU is the base station functional module of the IAB node, that is, the IAB node communicates with the subordinate nodes and the UE through the DU. Both the DU and MT modules of the IAB node have complete modules for receiving and sending, and there is an interface between them. It is worth noting that both MT and DU are logical modules, and in practice, they can share some sub-modules, for example, can share transceiver antennas, baseband processing modules, and so on.

Referring to FIG. 10, FIG. 10 is a flowchart of another MIMO codebook-based uplink transmission method provided by an embodiment of the present application. Before the first node transmits signals to the second node through MIMO, it first transmits MIMO parameters in different working modes to the network device, and the network device configures a first resource set according to the multiple sets of MIMO parameters received by the network device. A set includes multiple SRS resources. The network device sends the first resource set to the first node, and then the first node selects the corresponding SRS resource and precoding matrix, and uses MIMO to the second node according to the configuration information and precoding matrix in the selected SRS resource. Transmission signal. Figure 10 takes the first node as IAB node 1, the second node as IAB node 2, and the network device as a base station as an example, as shown in Figure 10, another MIMO codebook-based method for uplink transmission is as follows:

Step S1001: The IAB node 1 reports its MIMO parameters in different working modes to the base station.

Specifically, before the IAB node 1 transmits a signal to the IAB node 2 using MIMO, the MT of the IAB node 1 first sends multiple sets of MIMO parameters to the base station, and the multiple sets of MIMO parameters correspond to different working modes respectively. Wherein, the different working modes include full duplex mode (FD), time division multiplexing mode (TDM) and space division multiplexing mode (SDM). The relationship between the sent multiple sets of MIMO parameters and different working modes is an explicit relationship or an implicit relationship. When the relationship between the multiple sets of MIMO parameters reported by the MT of the IAB node 1 and the different working modes is explicit, the protocol specifies the MIMO parameter information corresponding to the different working modes, and the multiple sets of MIMO parameters reported by the IAB node 1 to the base station have different The identification of the working mode, when the base station receives multiple sets of MIMO parameters reported by the MT of the IAB node 1, it can know which different working mode the MIMO parameters correspond to through the identification. When the relationship between the multiple sets of MIMO parameters reported by the MT of IAB node 1 and different working modes is implicit, the information in the multiple sets of MIMO parameters reported by the MT of IAB node 1 (the number of available ports, the relationship between ports and the number of available panels) and the relationship between different working modes to determine different working modes corresponding to MIMO parameters, for example: when the number of available ports for one set of MIMO parameters reported by the MT of IAB node 1 is 4, The relationship between ports is partial correlation, then according to the provisions of the protocol, it can be judged that the mode corresponding to this set of MIMO parameters is not full-duplex mode; if the number of available ports of another set of MIMO parameters transmitted is 4, the If the relationship is full correlation, and panel 1 is unavailable, then, according to the protocol, it can be determined that the mode corresponding to this set of MIMO parameters is the full-duplex mode and/or the space-division multiplexing mode.

In a possible implementation manner, when the relationship between multiple sets of MIMO parameters reported by the MT of IAB node 1 to the base station and different working modes is an explicit relationship, the MT of IAB node 1 reports multiple sets of MIMO parameters to the base station respectively. There are two ways, namely: the MT of IAB node 1 reports the MIMO parameters in the time division multiplexing mode and the MIMO parameters in the non-time division multiplexing mode respectively; the MT of the IAB node 1 reports the MIMO parameters in the time division multiplexing mode, MIMO parameters in space division multiplexing mode and MIMO parameters in full duplex mode.

In a possible implementation manner, when the relationship between multiple sets of MIMO parameters reported by the MT of IAB2 to the base station and different working modes is an implicit relationship, the MT of IAB node 1 reports multiple sets of MIMO parameters to the base station respectively. There are two types, namely: the MT of the IAB node 1 reports the MIMO parameters that are implicitly related to the time-division multiplexing mode, the space-division multiplexing mode and the full-duplex mode; the MT of the IAB node 1 reports the restricted and MIMO parameters corresponding to the two unrestricted transmission modes. The relationship between the MIMO parameters corresponding to the unrestricted transmission mode and the time division multiplexing mode is implicit, and the relationship between the MIMO parameters corresponding to the restricted transmission mode and the non-time division multiplexing mode is implicit.

Step S1002: the base station receives the MIMO parameters in different working modes reported by the IAB node 1, configures a first resource set according to the MIMO parameters, and sends the first resource set to the IAB node 1; The information of the first resource set and the MIMO parameter information are sent to the IAB node 2.

Specifically, after the base station receives multiple sets of MIMO parameters sent by the MT of IAB node 1, no matter whether the relationship between the MIMO parameters and different working modes is implicit or explicit, the base station, according to the information in the MIMO parameters, Configure the first resource set.

In a possible implementation manner, the first resource set configured by the base station according to the multiple sets of MIMO parameters reported by the MT of the IAB node 1 includes a set of multiple reference signal resources, and the set of reference signal resources is an SRS resource set, The multiple SRS resource sets are respectively corresponding to the MIMO parameters under the different working modes, and the multiple SRS resource sets are the SRS resources configured by the base station and corresponding to the MIMO parameters under the different working modes respectively. For example, if the MT of IAB node 1 reports MIMO parameters that have an explicit or implicit relationship with the full-duplex mode, time-division multiplexing mode, and space-division multiplexing mode, the base station will configure the SRS resources of these three different working modes respectively. set. Among them, the functions of SRS resources in the same SRS resource set are the same, that is: if there are multiple SRS resources in the same SRS resource set, then the number of ports configured by these multiple SRS resources is the same, and the relationship between ports is also Identical (coherent, partially coherent, fully coherent).

When the base station configures multiple SRS resource sets, it will configure an identifier for each SRS resource set. There are three main ways to configure the identifier. relationship, that is: the new field {SDM} in the SRS resource set is used to indicate that the SRS resource set corresponds to the SRS resource in the space division multiplexing mode, and the SRS resource set is explicitly indicated by the method of adding a new field. The second method is that the base station numbers the configured SRS resource set (starting from 0), and specifies a protocol to specify the function corresponding to each number, wherein the protocol is known by the base station and the IAB node. For example, the protocol stipulates that the SRS resource set numbered 0 is the SRS resource set used for TDM transmission; the third method is that the base station numbers the configured SRS resource set (starting from 0), when the IAB node 2 sends the IAB When the MT of the node 1 sends the indication information, it will send the third indication information to the MT of the IAB node 1, and the third indication information is used to indicate different working modes corresponding to the numbers of the SRS resource set; wherein, the third indication information It is generated according to the information that the numbers correspond to different working modes sent by the base station to the IAB node 2 . Through the first and second methods above, when the MT of IAB node 1 receives the SRS resource set, it will know which different working mode the SRS resource set corresponds to through the identifier in it; through the third method above, the base station The SRS resource set is only numbered to distinguish the SRS resource set.

The base station sends its configured first resource set, that is, the configured multiple SRS resource sets to the IAB node 1, and sends the information of the multiple SRS resource sets and the MIMO parameter information reported by the IAB node 1 to the IAB node 2.

In a possible implementation manner, the first resource set configured by the base station according to the multiple sets of MIMO parameters reported by the MT of the IAB node 1 includes a set of reference signal resources, and the set of reference signal resources is the SRS resource set. There are multiple reference signal resources in the SRS resource set, the multiple reference signal resources are multiple SRS resources, the multiple SRS resources correspond to the MIMO parameters in the different working modes, and the multiple SRS resources SRS resources configured for the base station and corresponding to the MIMO parameters in the different working modes respectively. Among them, one or more SRS resources are allowed to correspond to a working mode.

When the base station configures multiple SRS resources, it will configure an identifier for each SRS resource. There are mainly three ways to configure the identifier. The first method is that the base station explicitly configures the relationship between the SRS resource and different working modes. For example, a new field {SDM} is added in the SRS resource to indicate that the SRS resource corresponds to the SRS resource in the space division multiplexing mode, and the function of the SRS resource is explicitly indicated by the method of adding a new field; the second The method is that the base station numbers the configured SRS resources (starting from 0), and specifies a protocol to specify the function corresponding to each number, wherein the protocol is known by the base station and the IAB node, for example: the protocol specifies the number The SRS resource of 0 is the SRS resource used for TDM transmission; the third method is that the base station numbers the configured SRS resource (starting from 0), when the IAB node 2 sends the instruction information to the MT of the IAB node 1, it will Additional third indication information to the MT of the IAB node 1, the third indication information is used to indicate different working modes corresponding to the number of the SRS resource; wherein, the third indication information is corresponding to the number sent by the base station to the IAB node 2 generated from the information of different working modes. Through the first and second methods above, when the MT of the IAB node 1 receives the SRS resource, it will know which different working mode the SRS resource is configured for through the identifier; SRS resources are only numbered to distinguish SRS resources.

The base station sends its configured first resource set to the IAB node 1, and sends the information of the first resource set and the information of the multiple sets of MIMO parameters uploaded by the IAB node 1 to the IAB node 2.

In a possible implementation manner, after receiving the MIMO parameters in different working modes reported by the IAB node 1, the base station will not configure SRS resources for it immediately, only when the base station receives the SRS resource configuration request message sent by the IAB node 1 After the command, the base station configures SRS resources for it. In order to facilitate the understanding of the SRS resource configuration request signaling by those skilled in the art, this embodiment illustrates the SRS resource configuration request signaling as an example. For example, the IAB node 1 sends five sets of MIMO parameters to the base station respectively. If the IAB node 1 needs the base station to configure the SRS resources of the first four sets of MIMO parameters, the IAB node 1 sends the SRS resource configuration request signaling to the base station. The resource configuration request signaling includes a request to configure the SRS resources of the first four sets of MIMO parameters. After receiving the SRS resource configuration request signaling, the base station will configure the first four correspondingly according to the content of the SRS resource configuration request signaling. SRS resource set of MIMO parameters. For the process of configuring the SRS resource set, refer to the configuration process of the SRS resource set in the first possible implementation manner in step S1002, which will not be repeated here.

The base station sends its configured first resource set, that is, the configured SRS resource set, to the IAB node 1, and sends the information of the SRS resource set and the information of the multiple sets of MIMO parameters reported by the IAB node 1 to the IAB node 2.

It should be noted that, when the first resource set configured by the base station only includes one SRS resource set, the SRS resource set includes multiple SRS resources, and the multiple SRS resources correspond to different working modes. For example, there are three SRS resources in the SRS resource set, and these three SRS resources correspond to the three working modes of full duplex, time division and space division respectively. In addition, there are also situations where multiple SRS resources correspond to one working mode. For example, there are 5 SRS resources in the SRS resource set, three of which correspond to the space division working mode, and the other two correspond to time division and full Duplex working mode; when there are multiple SRS resources corresponding to one working mode, the number of ports configured by these multiple SRS resources is the same.

Step S1003: the IAB node 2 sends the first indication information to the IAB node 1

Specifically, the IAB node 2 sends first indication information to the IAB node 1, where the first indication information is used to instruct the IAB node 1 to send the SRS signal to the IAB node 2; wherein, the first indication information includes one or more SRIs , used to instruct the IAB node 1 to select the corresponding SRS resource, and transmit the SRS signal to the IAB node 2 according to the configuration information in the selected SRS resource.

Step S1004: Based on the first indication information, the IAB node 1 sends the first reference signal to the IAB node 2 by using the first reference signal resource in the first resource set.

Specifically, after receiving the first indication information sent by the IAB node 2, the IAB node 1 selects the SRS resource corresponding to the current working mode of the IAB node 1 according to the first state information; and according to the SRI in the first indication information, An SRS resource is selected from the selected SRS resources, and then a first reference signal is sent to the IAB node 1 according to the configuration information in the selected SRS resource, where the first reference signal is an SRS signal. The first state information includes: uplink timing information of the IAB node 1 or time-frequency resource configuration information of the DU module and CU module of the IAB node 1 or resource configuration of the MT/DU of the IAB node 1 and scheduling information or some definitions binding agreement.

The IAB node 1 mainly selects the SRS resource according to the first state information in the following four ways:

In a possible implementation manner, if the MT of the IAB node 1 adopts uplink timings corresponding to different working modes, then the IAB node 1 uses the SRS resources corresponding to the working modes. For example, if the MT of the IAB node 1 determines the uplink timing in the space division transmission mode, the IAB node 1 uses the SRS resources in the space division multiplexing mode.

In a possible implementation manner, the IAB node 2 determines the SRS resource that should be used by the MT of the IAB node 1 according to the time domain resource configuration information of the DU and the MT of the IAB node 1, and sends an SRI indication to it.

In a possible implementation manner, the MT of the IAB node 1 determines the SRS resource corresponding to which working mode it selects according to the resource configuration of its MT/DU and the information of the scheduling situation. For example, if the IAB node 2 schedules the MT of the IAB node 1 to transmit the uplink signal at the location of the resource received by the DU uplink of the IAB node 1, it means that the IAB node 1 may be in the full-duplex working mode, then the IAB node 1 selects the full-duplex working mode The SRS resource corresponding to the duplex mode; if the IAB node 2 schedules the MT of the IAB node 2 to transmit the uplink signal at the location of the resource sent by the DU downlink of the IAB node 1, it means that the IAB node 1 may be in the working mode of space division transmission, then , the IAB node 1 selects the SRS resource corresponding to the space division multiplexing mode; if the IAB node 2 schedules the MT of the IAB node 1 to transmit the uplink signal at the location of the resource of the DU NA of the IAB node 1, it means that the current location of the IAB node 2 If the working mode is the time division multiplexing mode, then the IAB node 1 selects the SRS resource corresponding to the time division multiplexing mode.

In a possible implementation manner, the SRS resource corresponding to the working mode is selected by defining constraints (without other indication or signaling). It can only instruct IAB node 1 to use the SRS resource set corresponding to the full-duplex mode; or, for the DU resources of IAB node 1 in the opposite transmission direction, IAB node 2 can only instruct IAB node 1 to use the SRS resource set corresponding to the space division multiplexing mode. .

After selecting the corresponding SRS resource according to the first state information, the IAB node 1 will select the corresponding SRS resource according to the SRI in the first indication information, and the selection methods mainly include the following two methods:

In a possible implementation, if the SRS resources received by the IAB node 1 are multiple SRS resource sets configured by the base station, the multiple SRS resource sets correspond to MIMO parameters in different working modes respectively, and the SRS When the configuration method of the identifier of the resource set is the first method in step S1002, the IAB node 1 selects the SRS resource set of the corresponding field according to the first state information, and selects the corresponding SRS resource set according to the SRI in the first indication information , and then send the SRS signal to the IAB node 2 according to the configuration information in the selected SRS resource.

If the SRS resources received by the IAB node 1 are multiple SRS resource sets configured by the base station, the multiple SRS resource sets correspond to MIMO parameters in different working modes respectively, and the configuration methods of the identifiers of the SRS resource sets are steps In the second method in S1002, the IAB node 1 selects the SRS resource set of the corresponding number according to the first state information, and selects the corresponding SRS resource set from the selected SRS resource set according to the SRI in the first indication information SRS resource, and then send the SRS signal to the IAB node 2 according to the configuration information in the selected SRS resource.

If the SRS resources received by the IAB node 1 are multiple SRS resource sets configured by the base station, the multiple SRS resource sets correspond to MIMO parameters in different working modes respectively, and the configuration methods of the identifiers of the SRS resource sets are steps In the third manner in S1002, the IAB node 2 sends a third indication information to the IAB node 1, where the third indication information is used to indicate the difference between the number of the SRS resource set in the first resource set and the different working modes corresponding relationship. The IAB node 1 selects the SRS resource set of the corresponding number according to the third indication information and the first state information, and selects the corresponding SRS resource set in the selected SRS resource set according to the SRI in the first indication information, and then according to the selected SRS resource set The configuration information in the SRS resource, send the SRS signal to the IAB node 2.

In a possible implementation, if the SRS resource received by the IAB node 1 is an SRS resource set, there are multiple SRS resources in the SRS resource set, and the multiple SRS resources are related to MIMO parameters in different working modes When corresponding respectively, and the configuration mode of the identifier of the SRS resource is the first mode in step S1002, the IAB node 1 selects the SRS resource of the corresponding field according to the first state information, and according to the first indication information Select the corresponding SRS resource from the SRS resource of the selected field, and then send the SRS signal to the IAB node 2 according to the configuration information in the selected SRS resource.

If the SRS resource received by the IAB node 1 is an SRS resource set, there are multiple SRS resources in the SRS resource set, and the multiple SRS resources correspond to MIMO parameters in different working modes respectively, and the SRS resource When the configuration mode of the identification is the second mode in step S1002, the IAB node 1 selects the SRS resource of the corresponding number according to the first state information, and according to the SRI in the first indication information, selects the corresponding numbered SRS resource. Select the corresponding SRS resource in the SRS resource, and then send the SRS signal to the IAB node 2 according to the configuration information in the selected SRS resource.

If the SRS resource received by the IAB node 1 is an SRS resource set, there are multiple SRS resources in the SRS resource set, and the multiple SRS resources correspond to MIMO parameters in different working modes respectively, and the SRS resource When the configuration mode of the identification is the third mode in step S1002, the IAB node 2 sends the third indication information to the IAB node 1. According to the third indication information, the third indication information is used to indicate the correspondence between the numbers of the SRS resource sets in the first resource set and different working modes. The IAB node 1 selects the SRS resource of the corresponding number according to the third indication information and the first state information, and according to the SRI in the first indication information, the selected SRS resource (the same working mode may correspond to multiple Select the corresponding SRS resource in the SRS resource), and then send the SRS signal to the IAB node 2 according to the configuration information in the selected SRS resource.

Step S1005: The IAB node 1 reports the first information to the IAB node 2.

Specifically, the IAB node 1 selects the SRS resource according to the first indication information and the first state information, and after sending the SRS signal to the IAB node 2 according to the configuration information in the selected SRS resource, reports the first information to the IAB node 2, so The first information is used to indicate the unavailable TPMI in the different working modes. The first indication information includes indication information of the different working modes and indication information of unavailable TPMI in the different working modes. The precoding matrix indicated by the indication information of the unavailable TPMI may cause problems such as strong interference when the IAB node 1 in the current working mode transmits the uplink signal to the IAB node 2. By sending the indication information of the unavailable TPMI to the IAB node 2, it is referred to the IAB node 2, that is, the IAB node 2 selects the precoding matrix from the codebook without considering the precoding matrix indicated by the indication information of the TPMI. To a certain extent, the scope of searching the precoding matrix by the IAB node 2 is also reduced.

In different working modes, the number of available ports is different, and for different numbers of ports, the precoding matrix corresponding to TPMI is also different. For example, if the space division multiplexing mode of the IAB node is compared with the time division multiplexing mode, the number of available ports is different, and the understanding of the same TPMI is also different. Please refer to Table 1 and Table 2. Table 1 and Table 2 respectively correspond to a codebook with 4 available ports and a codebook with 2 available ports.

Table 1

Table 2

From Table 1 and Table 2, we can know that the number of available ports is different, and the precoding matrix corresponding to TPMI will also be different. For example, for the precoding matrix indicated by TPMI 0, when the number of available ports is 4, the There are four elements of the precoding matrix indicated by the TPMI; when the number of available ports is 2, there are two elements of the precoding matrix indicated by the TPMI, and these two matrices are obviously not the same matrix.

It is worth noting that it is stipulated in the protocol that different available port numbers have different codebooks. For the same TPMI, the precoding matrices indicated in different codebooks are different. Therefore, through the first indication information The indication information of different working modes may indicate the precoding matrix in the codebook under which working mode the indication information of the TPMI corresponds to.

Step S1006 : the IAB node 2 generates a DCI signal based on the information of the first reference signal and the MIMO parameter, and sends the DCI signal to the IAB node 1 .

Specifically, the IAB node 2 receives the first reference signal sent by the IAB node 1, where the first reference signal is an SRS signal sent by the IAB node 1, and estimates the uplink channel through the SRS signal to obtain the information of the uplink channel. After configuring the SRS resources, the base station sends the information of the configured SRS resources and the information of the multiple sets of MIMO parameters reported by the IAB node 1 to the IAB node 2, and the IAB node 2 obtains the uplink channel information and MIMO parameters based on it. The most suitable precoding matrix is selected for IAB node 2 in the codebook. If in step S1003, the number of SRIs in the indication information sent by the IAB node 2 is multiple, the IAB node 2 selects the most suitable SRS resource for the IAB node 1. Then the IAB node 2 puts information such as the TPMI corresponding to the selected precoding matrix and the SRI corresponding to the SRS resource in the DCI signal, and transmits the DCI signal to the IAB node 1.

Step S1007: IAB node 1 transmits a signal to IAB node 2 using MIMO based on the DCI signal.

Specifically, after receiving the DCI signal, the IAB node 1 selects the SRS resource and precoding matrix corresponding to the current working mode of the IAB node 1 according to the SRI and TPMI in the DCI signal, and according to the selected SRS resource For the configured port, IAB node 1 selects the corresponding port. According to the selected precoding matrix, IAB node 1 adds a weight to the signal sent by the selected port, and transmits the weighted signal to IAB node 2 through the selected port. The transmission of signals to the IAB node 2 using MIMO is implemented.

In step S1004, when the IAB node 1 receives the first indication information sent by the IAB node 2, the IAB node 1 selects the corresponding SRS resource according to the first state information, and selects from the selected SRS resource according to the SRI in the first indication information The corresponding SRS resource is similar. After receiving the TPMI in the DCI signal, the IAB node 1 uses the current working mode of the IAB node 1 or the relevant parameters in combination with the working mode, from the codebook of the corresponding working mode, according to the The above TPMI selects the precoding matrix. There are mainly three ways to achieve this:

In a possible implementation manner, if the MT of the IAB node 1 adopts the uplink timing corresponding to different working modes, the TPMI indication received by the IAB node 1 is the number of ports supported by the transmission of the corresponding working mode and the corresponding codebook. the precoding matrix. For example, if the MT of the IAB node 1 determines the uplink timing using the space division transmission mode, the MT of the IAB node 1 understands that the received TPMI indicates the number of ports supported by the space division multiplexing transmission, the number of ports in the corresponding codebook precoding matrix.

In a possible implementation manner, for the working modes of space division and full duplex, if the MT of the IAB node 1 receives a corresponding power control command, the power control command implicitly indicates the location where the IAB node 1 is located. In the working mode, the MT of the IAB node 1 understands that the TPMI indication it receives is the number of ports supported by the transmission in the corresponding working mode and the precoding matrix in the corresponding codebook.

In a possible implementation manner, the MT of the IAB node 1 understands, according to the resource configuration and scheduling of its MT/DU, the number of ports and the corresponding codebook that the TPMI it receives indicates which working mode transmission supports. The precoding matrix in . For example, if the IAB node 2 schedules the MT of the IAB node 1 to transmit the uplink signal at the location of the resource received by the DU uplink of the IAB node 1, it means that the IAB node 1 may be in the full-duplex working mode, then the IAB node 1 understands that The received TPMI indicates the number of ports supported by the full-duplex working mode transmission and the precoding matrix in the corresponding codebook; if the IAB node 2 schedules the IAB node 2 at the location of the resources sent by the DU downlink of the IAB node 1 The MT transmits the uplink signal, which means that the IAB node 1 may be in the working mode of space division transmission. Then, the IAB node 1 understands that the TPMI it receives indicates the number of ports supported by the space division working mode transmission and the corresponding code. The precoding matrix in this book; if the IAB node 2 schedules the MT of the IAB node 1 to transmit the uplink signal at the resource position of the DU NA of the IAB node 1, it means that the current working mode of the IAB node 2 is the time division multiplexing mode, Then, the IAB node 1 understands that the received TPMI indicates the number of ports supported by the time division multiplexing mode transmission and the precoding matrix in the corresponding codebook.

In this embodiment, the subordinate node (IAB node 1) reports multiple sets of MIMO parameters to the base station before transmitting the uplink signal to the superior node (IAB node 2) using MIMO, and the multiple sets of MIMO parameters correspond to different working modes. After receiving the MIMO parameters reported by the subordinate node, the base station configures multiple sets of SRS resources, and the SRS resources respectively correspond to different working modes. The base station sends the SRS resource to the lower node, and sends the information of the SRS resource and the information of the MIMO parameter to the upper node. The upper-level node sends the first indication information to the lower-level node, and the lower-level node selects the corresponding SRS resource according to the first state information, and selects the corresponding SRS resource in the selected SRS resource according to the SRI in the first indication information, and According to the configuration information in the selected SRS resource, the SRS signal is sent to the upper node. After sending the signal to the higher-level node, the lower-level node sends the first information to the upper-level node for reference in selecting a precoding matrix from the codebook corresponding to the working mode for the upper-level node. The upper-level node estimates the uplink channel according to the SRS signal sent by the lower-level node, obtains the information of the uplink channel, sends the DCI signal to the lower-level node based on the information of the uplink channel, SRS resources and MIMO parameters, and the downlink node selects the SRS resource according to the information in the DCI signal. and precoding matrix, and based on the configuration information and precoding matrix in the SRS resource, use MIMO to transmit signals to the upper node. The subordinate node reports multiple sets of MIMO parameters to the base station and obtains multiple sets of SRS resources. When the subordinate node is in other working modes, it selects the SRS resources and precoding matrix of the corresponding working mode, and uses MIMO to transmit signals to the superior node. Problems such as self-interference caused when the subordinate node is in other working modes (for example, the subordinate node is in the time division multiplexing mode and then transmits the signal in the space division multiplexing mode) is avoided, and the transmission quality of the signal is improved.

In addition, in this embodiment, the lower-level IAB node can report the indication information of the unavailable TPMI in different duplex multiplexing modes to the upper-level IAB node, so as to avoid the situation when the lower-level IAB node is in the space division multiplexing mode or the full-duplex mode. , the upper-level IAB node schedules the lower-level IAB node to use the TPMI that causes strong interference. At the same time, the IAB node and the base station have different understandings of TPMI in different working modes. In order to prevent the same TPMI indication information from indicating precoding matrices in multiple codebooks, the first information also includes indications of different working modes. information, so that the precoding matrix indicated by the indication information of the unavailable TPMI in the different working modes is unique.

Referring to FIG. 11 , FIG. 11 is a flowchart of another MIMO codebook-based uplink transmission method provided by an embodiment of the present application. Before transmitting the signal to the second node through MIMO, the first node first sends the MIMO parameters in the time division multiplexing mode to the network device. Then the network device sends a request signaling to the first node, requesting it to upload other MIMO parameters. The first node reports one or more sets of MIMO parameters to the network device based on the content of the request command, and the network device configures a first resource set after receiving the MIMO parameters, the first resource set includes multiple SRS resources, and the network device configures a first resource set. The device sends the first resource set to the first node. The first node selects the corresponding SRS resource and precoding matrix, and uses MIMO to transmit signals to the second node according to the configuration information and precoding matrix in the selected SRS resource. FIG. 11 takes as an example that the first node is IAB node 1, the second node is IAB node 2, and the network device is a base station. As shown in Figure 11, another MIMO codebook-based uplink transmission process is as follows:

Step S1101: The IAB node 1 reports the second parameter to the base station.

Specifically, the second parameter is the MIMO parameter of the first node in the first working mode, and the second parameter is the MIMO parameter reported by the first node and corresponding to the time division multiplexing mode; the first The working mode is time division multiplexing mode.

Step S1102: The base station receives the second parameter sent by the IAB node 1, and sends the first request signaling to the IAB node 1.

Specifically, after receiving the MIMO parameters corresponding to the time-division multiplexing mode reported by the IAB node 1, the base station will send the first request signaling to the IAB node 1, and the first request signaling is used for the IAB node 1 to report the time division multiplexing mode. One or more sets of MIMO parameters other than the multiplexing mode. After the base station receives the MIMO parameters in the time division multiplexing mode reported by the IAB node 1, there are the following three processing methods:

In a possible implementation manner, the base station configures a set of first reference signal resources for it according to the MIMO parameters corresponding to the time division multiplexing mode reported by the IAB node 1, where the set of first reference signal resources is time division multiplexed The SRS resource set corresponding to the mode, the SRS resource set is the SRS resource configured by the base station, and the base station sends the configured SRS resource and the first request signaling to the IAB node 1.

In a possible implementation manner, after receiving the MIMO parameter corresponding to the time division multiplexing mode reported by the IAB node 1, the base station configures the set of first reference signal resources corresponding to the MIMO parameter corresponding to the time division multiplexing mode, Send the first request signaling to the IAB node 1.

In a possible implementation manner, after receiving the MIMO parameter corresponding to the time division multiplexing mode reported by the IAB node 1, the base station sends the first request signaling to the IAB node 1.

Step S1103: The IAB node 1 reports the third parameter to the base station according to the first request signaling.

Specifically, in the first request signaling sent by the base station to the IAB node 1, the IAB node 1 is required to report a third parameter, where the third parameter includes one or more sets of MIMO parameters other than the time division multiplexing mode. When the IAB node 1 reports the third parameter to the base station according to the first request signaling, refer to step S1001, which is not repeated here.

Step S1104: The base station receives the third parameter, configures the reference signal resource, sends the configured reference signal resource to the IAB node 1, and sends the information of the reference signal resource and the information of the second parameter and the third parameter to the IAB node 2. information.

Specifically, after receiving the third parameter reported by the IAB node 1, there are the following four processing methods for sending the configured reference signal resources to the IAB node 1:

In a possible implementation manner, if the processing method after the base station receives the MIMO parameters in the time division multiplexing mode reported by the IAB node 1 is the first method in step S1102, the base station receives the IAB node 1 according to the After reporting the third parameter through the first request signaling, configure the corresponding resource set for it, and send the configured resource set to the IAB node 1 . Wherein, the resource set includes a set of multiple reference signals, and the set of multiple reference signals is multiple SRS resource sets; wherein, the multiple SRS resource sets respectively correspond to different working modes in the third parameter MIMO parameters, and the functions of the reference signal resources in the one SRS resource set are the same, and the reference signal resources are SRS resources; or the resource set includes a set of reference signal resources, and the set of the reference signal resources is SRS resource set, wherein the SRS resource set includes multiple reference signal resources, the multiple reference signal resources are multiple SRS resources, and the multiple SRS resources respectively correspond to the MIMO under different working modes in the third parameter parameter.

In a possible implementation manner, if the processing method after the base station receives the MIMO parameters in the time division multiplexing mode reported by the IAB node 1 is the second method in step S1102, the base station receives the IAB node 1 based on the After the third parameter reported by the first request signaling, the base station configures a resource set for it. Wherein, the resource set includes a set of multiple reference signals, and the set of multiple reference signals is multiple SRS resource sets; wherein, the multiple SRS resource sets respectively correspond to different working modes in the third parameter MIMO parameters, and the functions of the reference signal resources in the one SRS resource set are the same, and the reference signal resources are SRS resources; or the resource set includes a set of reference signal resources, and the set of the reference signal resources is SRS resource set, wherein the SRS resource set includes multiple reference signal resources, the multiple reference signal resources are multiple SRS resources, and the multiple SRS resources respectively correspond to the MIMO under different working modes in the third parameter parameter. Then, the base station sends its configured resource set and the first reference signal resource set to the IAB node 1 .

In a possible implementation manner, if the processing method after the base station receives the MIMO parameters in the time division multiplexing mode reported by the IAB node 1 is the third method in step S1102, the base station receives the IAB node 1 according to the After the third parameter reported by the first request signaling, the base station configures the resource set according to the arithmetic third parameter, and sends the configured resource set to the IAB node 1 .

In a possible implementation manner, if the processing method after the base station receives the MIMO parameters in the time division multiplexing mode reported by the IAB node 1 is the third method in step S1102, the base station receives the IAB node 1 according to the After the third parameter reported by the first request signaling, the base station configures the resource set according to the third parameter, configures the first reference signal resource set according to the second parameter, and sends the configured resource set and the first reference signal resource set to the IAB node 1.

Steps S1105 to S1109 refer to steps S1003 to S1007 respectively, which will not be repeated here.

This embodiment provides another way for the IAB node to report the MIMO parameters to the base station, that is: the IAB node reports the MIMO parameters corresponding to the time division multiplexing mode to the base station, and after the base station receives the reported MIMO parameters, the base station sends the first MIMO parameter to the IAB node. A request signaling is used to instruct the IAB node to send one or more sets of MIMO parameters corresponding to the time division multiplexing mode, and then configure corresponding SRS resources. In this way, the base station configures the SRS resources of the MIMO parameters required to be reported in the first request signaling, which avoids waste of SRS resources to a certain extent.

Referring to FIG. 12, FIG. 12 is a flowchart of another MIMO non-codebook-based uplink transmission method provided by an embodiment of the present application. Before the first node transmits signals to the second node through MIMO, it first reports multiple sets of MIMO parameters in different working modes to the network device, and the network device obtains the first resource set according to the multiple sets of MIMO parameters received. The first node calculates the precoding matrix of the current working mode according to the first channel state reference signal sent by the second node. Then, the first node transmits the uplink signal to the second node through MIMO according to the calculated precoding matrix and the configuration information in the reference signal resource selected according to the second indication information and the second state information. Figure 12 takes the first node as IAB node 1, the second node as IAB node 2, and the network device as a base station as an example, as shown in Figure 12, another MIMO-based non-codebook-based uplink transmission process is as follows :

Step S1201: The IAB node 1 reports its MIMO parameters in different working modes to the base station.

Specifically, in this embodiment, the process and operation of the IAB node 1 reporting multiple sets of MIMO parameters in different working modes to the base station are similar to step S1001, please refer to step S1001, which will not be repeated here.

Step S1202: The base station receives the MIMO parameters in different working modes reported by the IAB node 1, configures a first resource set according to the MIMO parameters, and sends the first resource set to the IAB node 1; The information of the first resource set and the MIMO parameter information are sent to the IAB node 2.

In a possible implementation manner, the first resource set configured by the base station according to the multiple sets of MIMO parameters reported by the MT of the IAB node 1 includes a set of multiple reference signal resources, and the set of reference signal resources is a set of SRS resource set Set, each of the multiple SRS resource sets corresponds to different MIMO parameters corresponding to the different working modes respectively, and the multiple SRS resource sets are configured by the base station and correspond to the MIMO parameters under the different working modes respectively. SRS resources. For example, if the MT of IAB node 1 reports MIMO parameters that have an explicit or implicit relationship with the full-duplex mode, time-division multiplexing mode, and space-division multiplexing mode, the base station will configure the SRS resources of these three different working modes respectively. set. Different from the SRS resource in the codebook-based transmission method, the number of SRS resources in an SRS resource set does not exceed 4, and each SRS resource can only be configured with one port. At the same time, the base station also uses the SRS resource set or SRS resource as a unit to configure a corresponding channel state reference signal for it, and the channel state reference signal is a CSI-RS signal.

When the base station configures multiple SRS resource sets, it will configure an identifier for each SRS resource set. There are three main ways to configure the identifier. For example, a new field {SDM} is added in the SRS resource set to indicate that the SRS resource set corresponds to the SRS resource in the space division multiplexing mode, and the SRS resource set is explicitly indicated by the method of adding a new field. The second method is that the base station numbers the configured SRS resource set (starting from 0), and specifies a protocol to specify the function corresponding to each number, wherein the protocol is known by the base station and the IAB node. For example, the protocol stipulates that the SRS resource set numbered 0 is the SRS resource set used for TDM transmission; the third method is that the base station numbers the configured SRS resource set (starting from 0), when the IAB node 2 sends the IAB When the MT of the node 1 sends the indication information, it will send the third indication information to the MT of the IAB node 1, and the third indication information is used to indicate different working modes corresponding to the numbers of the SRS resource set; wherein, the third indication information It is generated according to the information that the numbers correspond to different working modes sent by the base station to the IAB node 2 . Through the first and second methods above, when the MT of IAB node 1 receives the SRS resource set, it will know which different working mode the SRS resource set corresponds to through the identifier in it; through the third method above, the base station The SRS resource set is only numbered to distinguish the SRS resource set.

The base station sends its configured first resource set, that is, the configured multiple SRS resource sets, to the IAB node 1, and sends the information of the multiple SRS resource sets, the information of the multiple sets of MIMO parameters reported by the IAB node 1, and the configured The CSI-RS signal is sent to the IAB node 2.

In a possible implementation manner, the first resource set configured by the base station according to the multiple sets of MIMO parameters reported by the MT of the IAB node 1 includes a set of reference signal resources, and the set of reference signal resources is an SRS resource set. There are multiple reference signal resources in the SRS resource set, the multiple reference signal resources are multiple SRS resources, and the multiple SRS resources respectively correspond to different working modes and the MIMO parameters under the different working modes respectively correspond , the multiple SRS resources are the SRS resources configured by the base station and corresponding to the MIMO parameters in the different working modes respectively. Each SRS resource can only be configured with one port, and multiple SRS resources correspond to different working modes. Among them, one or more SRS resources are allowed to correspond to a working mode. At the same time, the base station also configures corresponding CSI-RS signals according to different working modes.

When the base station configures multiple SRS resources, it will configure an identifier for each SRS resource. There are mainly three ways to configure the identifier. The first method is that the base station explicitly configures the relationship between the SRS resource and different working modes. For example, a new field {SDM} is added in the SRS resource to indicate that the SRS resource corresponds to the SRS resource in the space division multiplexing mode, and the function of the SRS resource is explicitly indicated by the method of adding a new field; the second The method is that the base station numbers the configured SRS resources (starting from 0), and specifies a protocol to specify the function corresponding to each number, wherein the protocol is known by the base station and the IAB node, for example: the protocol specifies the number The SRS resource of 0 is the SRS resource used for TDM transmission; the third method is that the base station numbers the configured SRS resource (starting from 0), when the IAB node 2 sends the instruction information to the MT of the IAB node 1, it will Send the third indication information to the MT of the IAB node 1, where the third indication information is used to indicate different working modes corresponding to the number of the SRS resource; wherein, the third indication information is based on the number corresponding to the number sent by the base station to the IAB node 2 generated from the information of different working modes. Through the first and second methods above, when the MT of the IAB node 1 receives the SRS resource, it will know which different working mode the SRS resource is configured for through the identifier; SRS resources are only numbered to distinguish SRS resources.

The base station sends its configured first resource set to IAB node 1, and sends the information of the first resource set, the information of multiple sets of MIMO parameters uploaded by IAB node 1, and the configured CSI-RS signal to IAB node 2 .

In a possible implementation manner, after receiving the MIMO parameters in different working modes reported by the IAB node 1, the base station will not configure SRS resources for it immediately, only when the base station receives the SRS resource configuration request message sent by the IAB node 1 After the command, the base station configures SRS resources for it. In order to facilitate the understanding of the SRS resource configuration request signaling by those skilled in the art, this embodiment illustrates the SRS resource configuration request signaling as an example. For example, the IAB node 1 sends five sets of MIMO parameters to the base station respectively. If the IAB node 1 needs the base station to configure the SRS resources of the first four sets of MIMO parameters, the IAB node 1 sends the SRS resource configuration request signaling to the base station. The resource configuration request signaling includes a request to configure the SRS resources of the first four sets of MIMO parameters. After receiving the SRS resource configuration request signaling, the base station will configure the first four correspondingly according to the content of the SRS resource configuration request signaling. SRS resource set of MIMO parameters. At the same time, the base station also uses the SRS resource set as a unit to configure the corresponding CSI-RS signal for it. For the process of configuring the SRS resource set, refer to the configuration process of the SRS resource set in the first possible implementation manner in step S1202, which will not be repeated here.

The base station sends its configured first resource set, that is, the configured SRS resource set, to the IAB node 1, and sends the information of the SRS resource set, the information of the multiple sets of MIMO parameters uploaded by the IAB node 1, and the configured CSI-RS signal to the IAB node 1. IAB node 2.

It should be noted that when the first resource set configured by the base station only includes one SRS resource set, the SRS resource set includes multiple SRS resources, and the multiple SRS resources may correspond to different working modes. For example, there are three SRS resources in the SRS resource set, and these three SRS resources correspond to the three working modes of full duplex, time division and space division respectively. In addition, there are also situations where multiple SRS resources correspond to one working mode. For example, there are 5 SRS resources in the SRS resource set, three of which correspond to the space division working mode, and the other two correspond to time division and full Duplex working mode; only one port can be configured for each SRS resource.

Step S1203: The IAB node 2 sends the second indication information and the first channel state reference signal to the IAB node 1.

Specifically, the IAB node 2 sends second indication information to the IAB node 1, where the second indication information is used to instruct the IAB node 1 to send the SRS signal to the IAB node 2; wherein, the second indication information includes one or more SRIs , used to instruct IAB node 1 to select the corresponding SRS resouce. At the same time, the IAB node 2 sends the first channel state reference signal corresponding to the working mode of the IAB node 1 to the IAB node 1 according to the working mode of the IAB node 1, and the first channel state reference signal is a CSI-RS signal, Used for IAB node 1 to estimate the downlink channel.

Step S1204: The IAB node 1 estimates the downlink channel based on the first channel state reference signal, obtains the downlink channel information, determines the uplink channel information according to the downlink channel information, and obtains the uplink channel matrix. The IAB node 1 performs arithmetic processing on the uplink channel matrix to obtain a precoding matrix. The IAB node 1 selects the second reference signal resource according to the second indication information and the second state information, and sends the SRS signal to the IAB node 2 according to the configuration information and the precoding matrix in the second reference signal resource.

Specifically, the IAB node 1 receives the first state reference signal, and the first state reference signal is a CSI-RS signal corresponding to the current working mode of the IAB node 1. After the IAB node 1 receives the CSI-RS signal, it is based on The CSI-RS signal obtains the information of the uplink channel, and obtains a channel matrix of the uplink channel according to the obtained information of the uplink channel, and the specific process is: if the IAB node 2 sends the CSI- RS signal, IAB node 1 has four ports BP0~BP4 to receive the CSI-RS signal, then a 4x4 downlink channel matrix can be obtained according to the transceiver port:

Each element in the above channel matrix represents the probability of signal transmission. Taking element h ₁₂ as an example, h ₁₂ represents the probability that port AP0 sends a signal and port BP1 receives a signal.

After obtaining the downlink channel matrix, the IAB node 1 can obtain the uplink channel matrix according to the obtained downlink channel matrix. It is assumed that the uplink channel matrix and the downlink channel matrix are in a transposed relationship, that is:

Then the upstream channel matrix is:

IAB node 1 converts the uplink channel matrix

After operation processing, such as eigenvalue decomposition (SVD decomposition), the weight of the SRS sent by IAB node 1 in the uplink is calculated, and the precoding matrix is obtained. The calculation process of the precoding matrix is as follows:

Each element in the above precoding matrix represents the weight when the IAB node 1 transmits the SRS signal in the uplink. Taking element d ₁₂ as an example, d ₁₂ represents that if the port BP0 of the IAB node 1 sends the SRS signal to the IAB node 1, the IAB node The port AP1 of 2 receives the SRS signal, and the weight of the transmitted SRS signal is d ₁₂ .

After IAB node 1 receives the second indication information sent by IAB node 2, there are mainly the following four ways to select SRS resources:

In a possible implementation manner, the IAB node 2 determines the SRS resource that should be used by the MT of the IAB node 1 according to the time domain resource configuration information of the DU and the MT of the IAB node 1 .

After selecting the corresponding SRS resource according to the second state information, the IAB node 1 will select the corresponding SRS resource according to the SRI in the second indication information, and the selection methods mainly include the following two methods:

In a possible implementation, if the SRS resources received by the IAB node 1 are multiple SRS resource sets configured by the base station, the multiple SRS resource sets correspond to MIMO parameters in different working modes respectively, and the SRS When the configuration method of the identifier of the resource set is the first method in step S1202, the IAB node 1 selects the SRS resource set of the corresponding field according to the second state information, and selects the corresponding SRS resource set according to the SRI in the second indication information , and then send SRS signals with weights to the IAB node 2 according to the configuration information and the precoding matrix in the selected SRS resource.

If the SRS resources received by the IAB node 1 are multiple SRS resource sets configured by the base station, the multiple SRS resource sets correspond to MIMO parameters in different working modes respectively, and the configuration methods of the identifiers of the SRS resource sets are steps In the second method in S1202, the IAB node 1 selects the SRS resource set of the corresponding number according to the second state information, and selects the corresponding SRS resource set from the selected SRS resource set according to the SRI in the second indication information SRS resource, and send SRS signals with weights to IAB node 2 based on the precoding matrix and the configuration information in the selected SRS resource.

If the SRS resources received by the IAB node 1 are multiple SRS resource sets configured by the base station, the multiple SRS resource sets correspond to MIMO parameters in different working modes respectively, and the configuration methods of the identifiers of the SRS resource sets are steps In the third method in S1202, the IAB node 2 sends a fourth indication information to the IAB node 1, where the fourth indication information is used to indicate the difference between the number of the SRS resource set in the first resource set and the different working modes corresponding relationship. The IAB node 1 selects the SRS resource set of the corresponding number according to the fourth indication information and the second state information, and selects the corresponding SRS resource set in the selected SRS resource set according to the SRI in the second indication information, and then according to the precoding The configuration information in the matrix and the selected SRS resource respectively sends the SRS signal with the weight to the IAB node 2.

It should be noted that there is one or more SRS resources in the SRS resource set selected by the IAB node 1 according to the fourth indication information and the second state information, and each SRS resource can only be configured with one port and the configured port numbers are different . IAB node 1 will send SRS signals with weights to IAB node 2 based on the precoding matrix and the configuration information in the SRS resource in the selected SRS resource set. For example, IAB node 1 selects the SRS resource set corresponding to the time-division multiplexing mode. There are 4 SRS resources in the SRS resource set, and the ports configured for these 4 SRS resources are BP0 to BP3 respectively. SRS signals with weights will be sent to IAB node 2 through ports BP0~BP3 respectively.

In a possible implementation, if the SRS resource received by the IAB node 1 is an SRS resource set, there are multiple SRS resources in the SRS resource set, and the multiple SRS resources are related to MIMO parameters in different working modes corresponding respectively, and when the configuration mode of the identifier of the SRS resource is the first mode in step S1202, the IAB node 1 selects the SRS resource of the corresponding field according to the second state information, and according to the second indication information In the SRS resource of the selected corresponding field, select the corresponding SRS resource, and then send the SRS signal with the weight to the IAB node 2 according to the configuration information and precoding in the selected SRS resource.

If the SRS resource received by the IAB node 1 is an SRS resource set, there are multiple SRS resources in the SRS resource set, and the multiple SRS resources correspond to MIMO parameters in different working modes respectively, and the SRS resource When the configuration mode of the identification is the second mode in step S1202, the IAB node 1 selects the SRS resource corresponding to the number according to the SRS resource corresponding to the second state information, and according to the SRI in the second indication information. In the resource, select the corresponding SRS resource, and then send the SRS signal with the weight to the IAB node 2 according to the precoding matrix and the configuration information in the selected SRS resource.

If the SRS resource received by the IAB node 1 is an SRS resource set, there are multiple SRS resources in the SRS resource set, and the multiple SRS resources correspond to MIMO parameters in different working modes respectively, and the SRS resource When the configuration mode of the identification is the third mode in step S1202, the IAB node 2 sends the fourth indication information to the IAB node 1, and the fourth indication information is used to indicate that the number of the SRS resource set in the first resource set is the same as the number of the SRS resource set. Correspondence between different working modes. The IAB node 1 selects the SRS resource of the corresponding number according to the fourth indication information and the second state information, and selects the SRS resource of the corresponding number according to the SRI in the second indication information (the same working mode may correspond to multiple Select the corresponding SRS resource in the SRS resource), and then send the SRS signal with the weight to the IAB node 2 according to the precoding matrix and the configuration information in the selected SRS resource.

It should be noted that, for the SRS resource selected by the IAB node 1 according to the second state information, one working mode may correspond to multiple SRS resources, and each SRS resource can only be configured with one port and the configured port numbers are different. IAB node 1 will send SRS signals with weights to IAB node 2 according to the information of each selected SRS resource and the calculated precoding matrix (for example, sending SRS signals through different ports).

Step S1205: The IAB node 1 reports the second information to the IAB node 2.

Specifically, after sending the SRS signal to IAB node 2 according to the second indication information and the first channel state reference signal, IAB node 1 will report second information to IAB node 2, where the second information is used to indicate the different work mode, SRI not available. The second indication information includes indication information of the different working modes and indication information of an unavailable SRI in the different working modes. When using the configuration information in the SRS resource indicated by the unavailable SRI to transmit the uplink signal to the IAB node 2, problems such as strong interference will occur. By sending the indication information of the unavailable SRI to the IAB node 2, it is referred to the IAB node 2, that is, the IAB node 2 selects the corresponding SRS resource from the SRS resource set, regardless of the SRS resource indicated by the indication information of the SRI, in the To a certain extent, it also narrows the scope of IAB node 2 to find SRS resources.

In different working modes, the number of available ports is different, and the SRS resource indicated by SRI is also different for different port numbers. For example, when the space division multiplexing mode of an IAB node is compared with the time division multiplexing mode, the number of available ports is different, and the understanding of the same SRI is also different. In order to avoid that the same SRI indication information indicates precoding matrices in multiple codebooks, the first information also includes indication information of different working modes, so that the indication information of SRIs that are unavailable in the different working modes indicates SRS resource is unique.

Step S1206 : the IAB node 2 generates a DCI signal based on the information of the second reference signal and the MIMO parameter, and sends the DCI signal to the IAB node 1 .

Specifically, the IAB node 2 receives the second reference signal sent by the IAB node 1, and the second reference signal is a multi-channel SRS signal sent by the IAB node 1, which is used to estimate the uplink channel and obtain the information of the uplink channel. According to the The information of the uplink channel and multiple sets of MIMO parameters select the DMRS port and SRS resource of IAB node 1. The IAB node 2 places the information such as the DMRS port indicator corresponding to the DMRS port and the SRI corresponding to the SRS resource in the DCI signal, and transmits the DCI signal to the IAB node 1.

Step S1207: IAB node 1 transmits a signal to IAB node 2 using MIMO based on the DCI signal and the precoding matrix.

Specifically, after receiving the DCI signal, the IAB node 1 selects the corresponding SRS resource and port according to the SRI and DMRS port indicator in the DCI signal, and uses the port to transmit the signal to the IAB node 2. Then, according to the precoding matrix, the IAB node 1 assigns the weight of the uplink signal to be sent to the selected port, and sends the signal to the IAB node 2, thus realizing the use of MIMO uplink transmission of the signal with the weight.

In this embodiment, the subordinate node (IAB node 1) sends multiple sets of MIMO parameters to the base station before transmitting the uplink signal to the superior node (IAB node 2) using MIMO, and the multiple sets of MIMO parameters correspond to different working modes. After receiving the MIMO parameters sent by the subordinate node, the base station configures multiple sets of SRS resources, and the SRS resources respectively correspond to different working modes. The base station sends the SRS resource to the lower node, and sends the information of the SRS resource and the information of the MIMO parameter to the upper node. The upper-level node sends a scheduling instruction to the lower-level node, and the lower-level node calculates the precoding matrix according to the CSI-RS signal in the scheduling instruction, and then selects the SRS resource in the SRS resource corresponding to its current working mode according to the SRI in the instruction information, and according to The configuration information in the selected SRS resource sends an SRS signal to the upper node. After sending the signal to the upper node, the lower node sends the unavailable SRI corresponding to the current working mode to the upper node. The upper-level node estimates the uplink channel according to the SRS signal sent by the lower-level node, obtains the information of the uplink channel, sends the DCI signal to the lower-level node based on the information of the uplink channel, SRS resources and MIMO parameters, and the downlink node selects the port and the lower-level node according to the information in the DCI signal. SRS resource, and based on the configuration information and precoding matrix in the SRS resource, use MIMO to transmit signals to the upper node.

In addition, in this embodiment, the lower-level IAB node can report the unavailable SRIs in different working modes to the upper-level IAB node, so as to avoid the upper-level IAB node scheduling the lower-level IAB node when the lower-level IAB node is in the space division multiplexing mode or the full-duplex mode. IAB nodes use SRS resources that cause strong interference. At the same time, IAB nodes and base stations have different understandings of SRI in different working modes.

Referring to FIG. 13 , FIG. 13 is a flowchart of a MIMO uplink transmission provided by an embodiment of the present application. FIG. 13 is a method for a first node to perform uplink transmission using MIMO provided by an embodiment of the present application. Different from the embodiments of FIG. 10 , FIG. 11 and FIG. 12 , the upper node of the first node is a network device. Figure 13 takes the first node as the IAB node 1 and the network device as the base station as an example. The IAB node 1 uses MIMO to perform uplink transmission to the base station as follows:

Step S1301: The IAB node 1 reports its MIMO parameters in different working modes to the base station.

Specifically, similar to the embodiments in FIGS. 11 and 12 , before using MIMO to transmit signals to the base station, the IAB node 1 needs to report multiple sets of MIMO parameters in different working modes to the base station, so that the base station can configure the base station according to the multiple sets of MIMO parameters reported by it. Corresponding SRS resource.

Step S1302: The base station receives the MIMO parameters in different working modes reported by the IAB node 1, configures a first resource set according to the MIMO parameters, and sends the first resource set to the IAB node 1; The information of the first resource set and the MIMO parameter information are sent to the IAB node 2.

Specifically, when the IAB node 1 uses MIMO for uplink transmission based on a codebook, the base station configures the first resource set according to the MIMO parameters reported by the IAB node 1 . For the process of configuring the first resource set by the base station, please refer to step S1002, which will not be repeated here.

In a possible implementation manner, when the IAB node 1 uses MIMO for uplink transmission based on a non-codebook manner, the base station configures the first resource set according to the MIMO parameters reported by the IAB node 1 . For the process of configuring the first resource set by the base station, please refer to step S1202, which will not be repeated here.

Step S1303: The base station sends indication information to the IAB node 1.

Specifically, when the IAB node 1 uses MIMO for uplink transmission based on a codebook, the base station sends the first indication information to the IAB node 1, which is used to instruct the IAB node 1 to send the SRS signal to the base station; An indication message includes one or more SRIs, and is used to instruct the IAB node 1 to select the corresponding SRS resouce to send the SRS signal.

In a possible implementation manner, when the IAB node 1 uses MIMO for uplink transmission based on a non-codebook manner, the base station sends second indication information to the IAB node 1, where the second indication information includes one or more Each SRI and the base station send a first channel state reference signal corresponding to the working mode of the IAB node 1 to the IAB node 1 according to the working mode of the IAB node 1, where the first channel state reference signal is a CSI-RS signal. Wherein, the SRI is used to instruct the IAB node 1 to select the corresponding SRS resource to send the SRS signal to the base station; the CSI-RS signal is used for the IAB node 1 to estimate the downlink channel.

Step S1304: The IAB node 1 sends a reference signal to the base station according to the indication information.

Specifically, when the IAB node 1 uses MIMO for uplink transmission based on a codebook, the reference signal is the first reference signal, and the indication information received by the IAB node 1 from the base station is the first indication information, and the base station receives the first indication information. After reaching the first indication information, select the corresponding SRS resource according to the first state information of the IAB node 1, and select the corresponding SRS resource from the selected SRS resources according to the SRI in the first indication information, and select the corresponding SRS resource according to the selected SRS resource. The configuration information in the SRS resource sends an SRS signal to the base station. The IAB node 1 selects the SRS resource according to the first state information, and selects the corresponding SRS resource according to the first indication information, and then sends the SRS signal to the base station according to the configuration information in the selected SRS resource. Please refer to step S1004, here is not Repeat.

In a possible implementation, when the IAB node 1 uses MIMO for uplink transmission based on a non-codebook manner, the reference signal is the second reference signal, and the indication information received by the IAB node 1 from the base station is: For the second indication information, after receiving the second indication information, the base station estimates the downlink channel according to the CSI-RS signal in the indication information to obtain downlink channel information, and determines the uplink channel information according to the downlink channel information to obtain the uplink channel matrix. The IAB node 1 performs arithmetic processing on the uplink channel matrix to obtain a precoding matrix. The IAB node 1 selects the corresponding SRS resource according to the second state information, selects the corresponding SRS resource from the selected SRS resource according to the second indication information, and then sends to the base station according to the configuration information and the precoding matrix in the selected SRS resource SRS signal with weights. The IAB node 1 calculates the precoding matrix and selects the corresponding SRS resource according to the second state information, selects the corresponding SRS resource from the selected SRS resources according to the second indication information, and selects the corresponding SRS resource according to the precoding matrix and the selected SRS resource. The configuration information in the SRS resource sends the SRS signal with the weight to the base station, please refer to step S1024, which will not be repeated here.

Step S1305: The IAB node 1 reports information to the base station.

Specifically, when the IAB node 1 uses MIMO for uplink transmission based on a codebook, the information reported by the IAB node 1 to the base station is the first information, and the first information is used to indicate that in the different working modes, Unavailable TPMI. The first indication information includes indication information of the different working modes and indication information of unavailable TPMI in the different working modes. The precoding matrix indicated by the first indication information may cause strong interference to the uplink signal transmitted by the IAB node 1 in the current working mode to the base station. By sending the indication information of the unavailable TPMI to the base station for reference, that is, the base station selects the precoding matrix from the codebook without considering the precoding matrix indicated by the indication information of the TPMI, which reduces the size of the base station to a certain extent. Find the range of the precoding matrix. For the related introduction of the first information, please refer to step S1005, which will not be repeated here.

In a possible implementation manner, when the IAB node 1 uses MIMO for uplink transmission based on a non-codebook manner, the information reported by the IAB node 1 to the base station is second information, and the second information is used to indicate SRIs that are not available in the different working modes. The second indication information includes indication information of the different working modes and indication information of an unavailable SRI in the different working modes. The configuration information in the SRS resource indicated by the unavailable SRI will cause problems such as strong interference when transmitting the uplink signal to the IAB node 2. By sending the indication information of the unavailable SRI to the IAB node 2, it is referred to the IAB node 2, that is, the IAB node 2 selects the corresponding SRS resource from the SRS resource set, regardless of the SRS resource indicated by the indication information of the SRI, in the To a certain extent, it also narrows the scope of IAB node 2 to find SRS resources. For the related introduction of the second information, please refer to step S1205, which will not be repeated here.

Step S1306 : the base station generates a DCI signal according to the information of the reference signal and the MIMO parameter, and sends the DCI signal to the IAB node 1 .

Specifically, when the IAB node 1 uses MIMO for uplink transmission based on the codebook, after receiving the SRS signal sent by the IAB node 1, the base station estimates the uplink channel through the SRS signal, and obtains the information of the uplink channel. After the base station configures the SRS resources, it sends the information of the configured SRS resources and the information of the multiple sets of MIMO parameters reported by the IAB node 1 to the base station. suitable precoding matrix. If in step S1003, there are multiple SRIs in the indication information sent by the base station, the base station selects the most suitable SRS resource for the IAB node 1. Then the base station puts information such as the TPMI corresponding to the selected precoding matrix and the SRI corresponding to the SRS resource in the DCI signal, and transmits the DCI signal to the IAB node 1.

In a possible implementation, when the IAB node 1 uses MIMO for uplink transmission based on a non-codebook method, the base station receives the multi-channel SRS signal sent by the IAB node 1, which is used to estimate the uplink channel and obtain the uplink Channel information, select the DMRS port and SRS resource of IAB node 1 according to the uplink channel information and multiple sets of MIMO parameters. The base station places the information such as the DMRS port indicator corresponding to the DMRS port and the SRI corresponding to the SRS resource in the DCI signal, and transmits the DCI signal to the IAB node 1.

Step S1307: The IAB node 1 transmits the signal to the base station uplink by using MIMO according to the DCI signal.

Specifically, when the IAB node 1 uses MIMO for uplink transmission based on the codebook, after receiving the DCI signal, the IAB node 1 selects the current job of the IAB node 1 according to the SRI and TPMI in the DCI signal. The SRS resource and precoding matrix corresponding to the mode, and according to the port configured in the selected SRS resource, the IAB node 1 selects the corresponding port, and according to the selected precoding matrix, the IAB node 1 adds the signal sent by the selected port. With the upper weight value, the weighted signal is transmitted to the base station through the selected port, which realizes the use of MIMO to transmit the signal to the base station. For the specific process of the IAB node 1 transmitting the signal to the base station, please refer to step S1007, which will not be repeated here.

In a possible implementation, when the IAB node 1 uses MIMO for uplink transmission based on a non-codebook manner, after the IAB node 1 receives the DCI signal, the Select the corresponding SRS resource and port. Then, according to the precoding matrix, the IAB node 1 assigns the weight of the uplink signal to be sent to the selected port, and sends the signal to the base station, thereby realizing the use of MIMO uplink transmission signal. For the specific process of the IAB node 1 transmitting the signal to the base station, please refer to step S1207, which will not be repeated here.

In this embodiment, when the upper-level node of the IAB node 1 is a base station, similar to the embodiments in FIG. 10 and FIG. 12 , before using MIMO to transmit signals to the base station, the IAB node 1 must first report multiple sets of MIMO parameters to the base station. The multiple sets of MIMO parameters correspond to different working modes respectively. After receiving the multiple sets of MIMO parameters reported by the IAB node 1, the base station configures corresponding SRS resources. The IAB node 1 selects the corresponding SRS resource according to the current working mode, and uses the selected SRS resource to transmit a signal to the base station by using MIMO. With the method described in this embodiment, the IAB node 1 selects the corresponding SRS resource according to the current working mode, which effectively avoids problems such as strong interference and unavailability of some panels, and improves the signal transmission quality.

In a possible implementation manner, the IAB node reports its own hardware capability or status, including, for example, the number of available antennas in different modes, the number of antenna ports, the number of panels, and the relationship between antennas and/or panels. In addition, the IAB MT reports the MIMO parameters in the time division multiplexing mode. The base station determines the corresponding resource sets of the IAB node in different working modes according to the hardware capability or state reported by the IAB and the MIMO parameters in the time division multiplexing mode, which are used for MIMO transmission in different modes. The method for determining/indicating reference signal resources used in different modes is similar to other embodiments of the present application, and details are not described herein again.

The methods of the embodiments of the present application are described in detail above, and the related apparatuses of the present embodiments are provided below.

Please refer to FIG. 14. FIG. 14 is a schematic structural diagram of an apparatus for determining transmission parameters provided by an embodiment of the present application. The apparatus for determining transmission parameters 14 may be the first node in the above method embodiments, and the apparatus for determining transmission parameters 14 It may include a reporting unit 1401 and a receiving unit 1402, wherein the detailed description of each unit is as follows:

A reporting unit 1401, configured to report MIMO parameters in different working modes to a network device;

The receiving unit 1402 is configured to receive a first resource set sent by the network device, wherein the first resource set includes reference signal resources corresponding to different working modes respectively.

In a possible implementation manner, the device 14 for determining transmission parameters further includes:

It can be understood that, the description of each unit in the transmission parameter determining apparatus 14 may also correspond to the execution steps of the first node in the embodiment of the transmission parameter determining method, which will not be described in detail here.

Please refer to FIG. 15. FIG. 15 is a schematic structural diagram of an apparatus for determining transmission parameters provided by an embodiment of the present application. The apparatus for determining transmission parameters 15 may be the network equipment in the above method embodiments, and the apparatus for determining transmission parameters 15 may be It includes a receiving unit 1501, a resource configuration unit 1502 and a sending unit 1503, wherein the detailed description of each unit is as follows:

A receiving unit 1501, configured to receive the MIMO parameters reported by the first node under different working modes;

a resource configuration unit 1502, configured to configure a first resource set;

The sending unit 1503 is configured to send the first resource set to the first node, wherein the first resource set includes reference signal resources corresponding to different working modes respectively.

In a possible implementation manner, the resource configuration unit 1502 further includes:

In a possible implementation manner, the device 15 for determining transmission parameters further includes:

It can be understood that the description of each unit in the transmission parameter determining apparatus 15 may also correspond to the execution steps of the network device in the embodiment of the transmission parameter determining method, which will not be described in detail here.

Please refer to FIG. 16. FIG. 16 is a schematic structural diagram of an apparatus for determining transmission parameters provided by an embodiment of the present application. The apparatus for determining transmission parameters 16 may be the second node in the above method embodiments. The apparatus for determining transmission parameters 16 It may include a first indication information sending unit 1601, a first reference signal receiving unit 1602 and a first information receiving unit 1603, wherein the detailed description of each unit is as follows:

a first indication information sending unit 1601, configured to send the first indication information to the first node;

a first reference signal receiving unit 1602, configured to receive a first reference signal sent by the first node using the first reference signal resource in the first resource set based on the first indication information;

The first information receiving unit 1603 is configured to receive the first information reported by the first node; wherein the first information is used to indicate the unavailable TPMI in the different working modes.

It can be understood that, the description of each unit in the apparatus for determining transmission parameters 16 may also correspond to the execution steps of the second node in the embodiment of the method for determining transmission parameters, which will not be described in detail here.

Please refer to FIG. 17 . FIG. 17 is a schematic structural diagram of an apparatus for determining transmission parameters provided by an embodiment of the present application. The apparatus for determining transmission parameters 17 may be the second node in the above method embodiments, and the apparatus for determining transmission parameters 17 It may include a second indication information sending unit 1701, a first channel state reference signal sending unit 1702, a second reference signal receiving unit 1703 and a second information receiving unit 1704, wherein the detailed description of each unit is as follows:

The second indication information sending unit 1701 is configured to send the second indication information to the first node;

a first channel state reference signal sending unit 1702, configured to send a first channel state reference signal to the first node;

The second reference signal receiving unit 1703 is configured to receive, based on the second indication information, the first channel state reference signal sent by the first node using the first channel state reference signal and the second reference signal resources in the first resource set. Two reference signals;

The second information receiving unit 1704 is configured to receive the second information reported by the first node, wherein the second information is used to indicate the unavailable SRI in the different working modes.

It can be understood that, the description of each unit in the apparatus for determining transmission parameters 17 may also correspond to the execution steps of the second node in the embodiment of the method for determining transmission parameters, which will not be described in detail here.

Please refer to FIG. 18. FIG. 18 is a schematic structural diagram of an apparatus for determining transmission parameters provided by an embodiment of the present application. The apparatus for determining transmission parameters may be the first node in the above method embodiments, and the apparatus for determining transmission parameters 18 may be It includes a memory 1801, a communication module 1802 and a processor 1803, wherein the detailed description of each unit is as follows:

The memory 1801 is used to store program codes.

The communication module 1802 is used to perform the following steps:

Report the MIMO parameters in different working modes to the network device;

A first resource set sent by the network device is received; wherein the first resource set includes reference signal resources corresponding to different working modes respectively.

In a possible implementation manner, the communication module 1802 is further configured to: after receiving the first resource set configured by the network device, further include:

The first indication information sent by the second node is received.

In a possible implementation manner, the communication module 1802 is further configured to: after the processor 1803 uses the first reference signal resource in the first resource set based on the first indication information, send a message to the second node A first reference signal is sent.

In a possible implementation manner, the communication module 1802 is further configured to: after sending the first reference signal to the second node, report the first information to the second node; wherein the first information is used for Indicates the unavailable TPMI in the different working modes.

The second indication information and the first channel state reference signal sent by the second node are received.

In a possible implementation manner, the communication module 1802 is further configured to: use the first channel state reference signal and the second reference signal in the first resource set in the processor 1803 based on the second indication information After the resource, a second reference signal is sent to the second node.

In a possible implementation manner, the communication module 1802 is further configured to: after sending the second reference signal to the second node, report second information to the second node; wherein the second information is used for Indicates the unavailable SRI in the different working modes.

The processor 1803 is configured to call the program code stored in the memory to perform the following steps:

After the communication module 1802 receives the first indication information sent by the second node, the first reference signal resource in the first resource set is used based on the first indication information.

In a possible implementation manner, the processor 1802 is further configured to: after the communication module 1802 receives the second indication information and the first channel state reference signal sent by the second node, based on the second indication information, Using the first channel state reference signal and second reference signal resources in the first resource set.

It can be understood that, the description of each unit in the apparatus for determining transmission parameters 18 may also correspond to the execution steps of the first node in the embodiment of the method for determining transmission parameters, which will not be described in detail here.

Please refer to FIG. 19. FIG. 19 is a schematic structural diagram of an apparatus for determining transmission parameters provided by an embodiment of the present application. The apparatus for determining transmission parameters may be a network device in the above method embodiments, and the apparatus for determining transmission parameters 19 may include a memory 1901. , the communication module 1902 and the processor 1903, wherein the detailed description of each unit is as follows:

The memory 1901 is used to store program codes.

The communication module 1902 is used to perform the following steps:

Receive MIMO parameters in different working modes reported by the first node.

In a possible implementation manner, the communication module 1902 is further configured to: after the processor 1903 configures the first resource set, send the first resource set to the first node; wherein the first resource A set includes reference signal resources corresponding to different operating modes respectively.

In a possible implementation manner, the communication module 1902 is further configured to: after the processor 1903 configures the first resource set, send the information of the first resource set to the second node.

The processor 1903 is configured to call the program code stored in the memory to perform the following steps:

After the communication module 1902 receives the MIMO parameters in different working modes reported by the first node, the first resource set is configured.

In a possible implementation manner, configuring the first resource set by the processor 1903 further includes: if the first resource set is a set of multiple reference signal resources, a set of multiple reference signal resources in the first resource set Sets are configured with corresponding identifiers respectively;

It can be understood that, the description of each unit in the apparatus for determining transmission parameters 19 may also correspond to the execution steps of the network equipment in the embodiment of the method for determining transmission parameters, which will not be described in detail here.

Please refer to FIG. 20. FIG. 20 is a schematic structural diagram of an apparatus for determining transmission parameters provided by an embodiment of the present application. The apparatus for determining transmission parameters 20 may be the second node in the above method embodiments, and the apparatus for determining transmission parameters 20 may include a memory 2001. , the communication module 2002 and the processor 2003, wherein the detailed description of each unit is as follows:

The memory 2001 is used to store program codes.

The communication module 2002 is used to perform the following steps:

Information about the first resource set sent by the network device is received.

In a possible implementation manner, the communication module 2002 is further configured to: after receiving the information of the first resource set sent by the network device, send the first indication information to the first node.

In a possible implementation manner, the communication module 2002 is further configured to: after sending the first indication information to the first node, receive the first reference signal sent by the first node.

In a possible implementation manner, the communication module 2002 is further configured to: after receiving the first reference signal, receive first information reported by the first node; wherein the first information is used to indicate the different TPMI not available in work mode.

The processor 2003 is configured to call the program code stored in the memory to perform the following steps:

After the communication module 2002 receives the information of the first resource set sent by the network device, it generates first indication information.

It can be understood that the description of each unit in the apparatus 20 for determining transmission parameters may also correspond to the execution steps of the second node in the embodiment of the method for determining transmission parameters, which will not be described in detail here.

Please refer to FIG. 21. FIG. 21 is a schematic structural diagram of an apparatus for determining transmission parameters provided by an embodiment of the present application. The apparatus for determining transmission parameters 21 may be the second node in the above method embodiments, and the apparatus for determining transmission parameters 21 may include a memory 2101. , the communication module 2102 and the processor 2103, wherein the detailed description of each unit is as follows:

The memory 2101 is used to store program codes.

The communication module 2102 is used to perform the following steps:

In a possible implementation manner, the communication module 2102 is further configured to: after receiving the information of the first resource set sent by the network device, send the second indication information and the first channel state reference signal to the first node.

In a possible implementation manner, the communication module 2102 is further configured to: after sending the second indication information and the first channel state reference signal to the first node, receive the second reference signal sent by the first node.

In a possible implementation manner, the communication module 2102 is further configured to: after receiving the second reference signal, receive the first information reported by the first node; wherein the first information is used to indicate the Unavailable TPMI in different working modes.

The processor 2103 is configured to call the program code stored in the memory to perform the following steps:

After the communication module 2002 receives the information of the first resource set sent by the network device, second indication information is generated.

It can be understood that, the description of each unit in the apparatus for determining transmission parameters 21 may also correspond to the execution steps of the second node in the embodiment of the method for determining transmission parameters, which will not be described in detail here.

An embodiment of the present application provides a computer-readable storage medium, where the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, implements the network in the foregoing embodiment and various possible implementation manners thereof Data measurement methods.

The embodiments of the present application provide a computer program, the computer program includes instructions, when the computer program is executed by a computer, so that the network device of the collection point can execute the network device of the collection point in the above embodiment and its various possible implementation manners The executed process, or the second network device can execute the process executed by the second network device in the foregoing embodiment and its various possible implementations, so that the server can execute the server in the foregoing embodiment and its various possible implementations. the process performed.

An embodiment of the present application provides a chip system, where the chip system includes a processor, configured to support a network device of a collection point to implement the functions involved in the methods in the foregoing embodiments and various possible manners, or a second network device to implement the foregoing The functions involved in the methods in the embodiments and their various possible manners, or the server implements the functions involved in the methods in the above-mentioned embodiments and their various possible manners.

In a possible design, the chip system further includes a memory, and the memory is used for storing necessary program instructions and data of the network device of the collection point or the second network device or the server. The chip system may be composed of chips, or may include chips and other discrete devices.

It should be noted that the memory in the above-mentioned embodiments may be a read-only memory (read-only memory, ROM) or other types of static storage devices that can store static information and instructions, a random access memory (random access memory, RAM) or Other types of dynamic storage devices that can store information and instructions, and can also be Electrically Erasable Programmable Read-Only Memory (EEPROM), Compact Disc Read-Only Memory, CD-ROM ) or other optical disc storage, optical disc storage (including compact disc, laser disc, optical disc, digital versatile disc, blu-ray disc, etc.), magnetic disk storage medium or other magnetic storage device, or capable of carrying or storing data in the form of instructions or data structures desired program code and any other medium that can be accessed by a computer, but is not limited thereto. The memory may exist independently and be connected to the processor through a bus. The memory can be integrated with the processor.

The processor in the above-mentioned embodiment may be a general-purpose central processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits for controlling the execution of the above program programs. circuit.

For the foregoing method embodiments, for the sake of simple description, they are all expressed as a series of action combinations, but those skilled in the art should know that the present application is not limited by the described action sequence, because according to the present application, Certain steps may be performed in other orders or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present application. In the several embodiments provided in this application, it should be understood that the disclosed apparatus may be implemented in other manners. For example, the device embodiments described above are only illustrative. For example, the division of the above-mentioned units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated. to another system, or some features can be ignored, or not implemented.

The units described above as separate components may or may not be physically separated, and components shown as units may or may not be physical units, and may be located in one place or distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware, or may be implemented in the form of software functional units.

If the above-mentioned integrated units are implemented in the form of software functional units and sold or used as independent products, they may be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application can be embodied in the form of software in essence, or the part that contributes to the prior art, or all or part of the technical solution, and the computer software product is stored in a storage medium, including Several instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc., specifically a processor in the computer device) to execute all or part of the steps of the foregoing methods in various embodiments of the present application. Wherein, the aforementioned storage medium may include: U disk, mobile hard disk, magnetic disk, optical disk, read-only memory (read-only memory, ROM) or random access memory (random access memory, RAM) and other various programs that can store program codes medium.

As mentioned above, the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: The technical solutions described in the embodiments are modified, or some technical features thereof are equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions in the embodiments of the present application.

Claims

A method for determining transmission parameters, comprising:

The first node reports its MIMO parameters in different working modes to the network device;

The first node receives a first resource set sent by the network device; wherein, the first resource set includes reference signal resources corresponding to different working modes respectively.
The method of claim 1, wherein the MIMO parameters in different working modes include:

The number of available ports in the different working modes, the relationship information between the available ports, and the number of available panels.
The method according to claim 1, wherein the first resource set is a set of multiple reference signal resources, and the set of multiple reference signal resources corresponds to the MIMO parameters in the different working modes respectively; Wherein, each set of reference signal resources includes multiple reference signal resources, and the reference signal resources in the same set of reference signal resources have the same function; or

The first resource set is a set of reference signal resources, the set of reference signal resources includes multiple types of reference signal resources, and the multiple types of reference signal resources are respectively related to the MIMO parameters in the different working modes. Corresponding; wherein, each type of reference signal resources includes one or more reference signal resources.
The method according to any one of claims 1-3, wherein after the first node receives the first resource set configured by the network device, the method further comprises:

receiving, by the first node, the first indication information sent by the second node;

sending, by the first node, a first reference signal to the second node by using the first reference signal resource in the first resource set based on the first indication information;

The first node reports first information to the second node; wherein the first information is used to indicate the unavailable TPMI in the different working modes;

The first node is a downstream node of the second node.
The method of claim 4, wherein the using the first reference signal resources in the first resource set comprises:

The first reference signal resource in the first resource set is selected according to the first state information.
The method of claim 5, wherein the first state information is:

Uplink timing information corresponding to different working modes of the first node; or

Time-frequency resources and scheduling information of the DU function module and the MT function module of the first node.
The method according to any one of claims 1-3, wherein after the first node receives the first resource set configured by the network device, the method further comprises:

receiving, by the first node, the second indication information and the first channel state reference signal sent by the second node;

The first node sends a second reference signal to the second node by using the first channel state reference signal and the second reference signal resource in the first resource set based on the second indication information;

The first node reports second information to the second node; wherein, the second information is used to indicate the unavailable SRI in the different working modes;

The first node is a downstream node of the second node.
The method of claim 7, wherein the using the first channel state reference signal and the second reference signal resource in the first resource set comprises:

using the first channel state reference signal, and selecting a second reference signal resource in the first resource set according to the second state information.
The method of claim 8, wherein the second state information is:

Uplink timing information corresponding to different working modes of the first node; or

Time-frequency resources and scheduling information of the DU function module and the MT function module of the first node.
A method for determining transmission parameters, comprising:

The network device receives the MIMO parameters in different working modes reported by the first node;

The network device configures a first resource set, and sends the first resource set to the first node; wherein the first resource set includes reference signal resources corresponding to different working modes respectively.
The method of claim 10, wherein the MIMO parameters in different working modes include:

The number of available ports in the different working modes, the relationship information between the available ports, and the number of available panels.
The method according to claim 10, wherein the first resource set is a set of multiple reference signal resources, and the set of multiple reference signal resources corresponds to the MIMO parameters in the different working modes respectively; Wherein, each set of reference signal resources includes multiple reference signal resources, and the reference signal resources in the same set of reference signal resources have the same function; or

The first resource set is a set of reference signal resources, the set of reference signal resources includes multiple types of reference signal resources, and the multiple types of reference signal resources are respectively related to the MIMO parameters in the different working modes. Corresponding respectively; each type of reference signal resource includes one or more reference signal resources.
The method according to any one of claims 10-12, wherein configuring the first resource set by the network device further comprises:

If the first resource set is a set of multiple reference signal resources, the network device configures corresponding identifiers for the sets of multiple reference signal resources in the first resource set respectively;

If the first resource set is a set of reference signal resources, the network device configures corresponding identifiers for a plurality of reference signal resources in the first resource set respectively.
The method according to any one of claims 10-13, wherein after the network device configures the first resource set, the method further comprises:

The network device sends the information of the first resource set to the second node.
A method for determining transmission parameters, comprising:

The second node sends the first indication information to the first node;

receiving, by the second node, a first reference signal sent by the first node using the first reference signal resource in the first resource set based on the first indication information;

receiving, by the second node, the first information reported by the first node; wherein the first information is used to indicate the unavailable TPMI in the different working modes;

The first node is a downstream node of the second node.
The method according to claim 4 or 15, wherein the first indication information comprises indication information of the different working modes and indication information of unavailable TPMI in the different working modes;

The indication information of the different working modes includes: the number of available ports in the different working modes, the relationship information between the available ports, and the number of available panels.
The method according to claim 15, wherein before the second node sends the first indication information to the first node, the method further comprises:

The second node receives the information of the first resource set sent by the network device.
A method for determining transmission parameters, comprising:

The second node sends the second indication information and the first channel state reference signal to the first node;

receiving, by the second node, a second reference signal sent by the first node based on the second indication information using the first channel state reference signal and second reference signal resources in the first resource set;

receiving, by the second node, the second information reported by the first node; wherein the second information is used to indicate the unavailable SRI in the different working modes;

The first node is a downstream node of the second node.
The method according to claim 7 or 18, wherein the second indication information comprises indication information of the different working modes and indication information of an unavailable SRI in the different working modes;

The indication information of the different working modes includes: the number of available ports in the different working modes, the relationship information between the available ports, and the number of available panels.
The method according to claim 18, wherein before the second node sends the second indication information and the first channel state reference signal to the first node, the method further comprises:

The second node receives the information of the first resource set sent by the network device.
A device for determining transmission parameters, characterized in that the device for determining transmission parameters is a first node, comprising a unit for executing the method according to any one of claims 1-9 or claim 16 or claim 19 .
A device for determining transmission parameters, characterized in that the device for determining transmission parameters is a network device, comprising a unit for executing the method according to any one of claims 10-14.
A device for determining transmission parameters, characterized in that the device for determining transmission parameters is a second node, comprising a unit for executing the method according to any one of claims 15-20.
A device for determining transmission parameters, characterized in that the device for determining transmission parameters is a first node, comprising a processor and a memory;

Wherein, the memory is used for storing program codes, and the processor is used for calling the program codes stored in the memory to execute the method according to any one of claims 1-9 or claim 16 or claim 19 .
A device for determining transmission parameters, characterized in that the device for determining transmission parameters is network equipment, comprising a processor and a memory;

Wherein, the memory is used for storing program codes, and the processor is used for calling the program codes stored in the memory to execute the method according to any one of claims 10-14.
A device for determining transmission parameters, characterized in that the device for determining transmission parameters is network equipment, comprising a processor and a memory;

Wherein, the memory is used for storing program codes, and the processor is used for calling the program codes stored in the memory to execute the method according to any one of claims 15-20.
A computer-readable storage medium, characterized in that the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, implements the method according to any one of claims 1-20.