Wireless communication method and device

Abstract

The embodiment of the present application provides a wireless communication method and device, which can realize the measurement and feedback of reference signals supporting multiple downlink channel transmissions. The method includes: a terminal device measures multiple reference signals; the terminal device determines, based on the measurement results, reporting information including a rank indication corresponding to each reference signal in the multiple reference signals; the terminal device sends the reporting information including a rank indication corresponding to each reference signal to the network side.

Description

Technical Field

[0001] The present application relates to the field of communications, and more specifically, to a wireless communication method and device. Background Art

[0002] In the current New Radio (NR) system, multiple transmitting nodes can jointly send a Physical Downlink Control Channel (PDCCH) or a Physical Downlink Shared Channel (PDSCH) to a terminal device.

[0003] Therefore, how to measure and feedback reference signals to support transmission of multiple downlink channels is an urgent problem to be solved. Summary of the invention

[0004] The embodiments of the present application provide a wireless communication method and device, which can realize the measurement and feedback of reference signals supporting transmission of multiple downlink channels.

[0005] In a first aspect, a wireless communication method is provided, comprising:

[0006] The terminal device measures a plurality of reference signals;

[0007] The terminal device determines, according to the measurement result, reporting information including a rank indication corresponding to each reference signal in the multiple reference signals;

[0008] The terminal device sends reporting information including a rank indication corresponding to each reference signal to the network side.

[0009] In combination with the first aspect, in a possible implementation manner of the first aspect, the multiple reference signals come from multiple transmitting nodes or multiple downlink transmit beams that jointly serve the terminal device.

[0010] In combination with the first aspect or any one of the foregoing possible implementation manners, in another possible implementation manner of the first aspect, the terminal device sends, to the network side, reporting information including a rank indication corresponding to each reference signal, including:

[0011] The terminal devices respectively send reporting information including a rank indication corresponding to the reference signal itself to the transmitter of the reference signal.

[0012] In combination with the first aspect or any one of the above possible implementations, in another possible implementation of the first aspect, the value of the rank indication in the reporting information corresponding to each reference signal is less than or equal to the value corresponding to the capability of the terminal device, and / or less than or equal to the port quantity value corresponding to each reference signal configured for the terminal device.

[0013] In combination with the first aspect or any one of the above possible implementations, in another possible implementation of the first aspect, the sum of the values ​​of the rank indications in the reporting information corresponding to the multiple reference signals is less than or equal to the value corresponding to the capability of the terminal device.

[0014] In combination with the first aspect or any one of the foregoing possible implementation manners, in another possible implementation manner of the first aspect, the terminal device sends, to the network side, reporting information including a rank indication corresponding to each reference signal, including:

[0015] Sending a first message to a transmitter of at least one first reference signal among the multiple reference signals, where the first message includes reporting information corresponding to the first reference signal including a rank indication;

[0016] The first message further includes: a rank indication included in reporting information corresponding to at least one second reference signal among the multiple reference signals.

[0017] In combination with the first aspect or any one of the above possible implementations, in another possible implementation of the first aspect, the sum of the values ​​of the rank indications in the reporting information corresponding to the multiple reference signals is greater than the value corresponding to the capability of the terminal device.

[0018] In combination with the first aspect or any of the foregoing possible implementations, in another possible implementation of the first aspect, the value of the rank indication in the reporting information corresponding to each reference signal is less than or equal to the maximum value of the rank indication in the respective corresponding reporting information; or,

[0019] A sum of the values ​​of the rank indicators in the reporting information corresponding to the multiple reference signals is less than or equal to a maximum value of the sum of the values ​​of the rank indicators in the reporting information corresponding to the multiple reference signals.

[0020] In combination with the first aspect or any one of the foregoing possible implementations, in another possible implementation of the first aspect, the terminal device determines, according to the measurement result, reporting information including a rank indication corresponding to each reference signal in the multiple reference signals, including:

[0021] The terminal device determines, according to its own capability, a maximum value of the rank indication in the reporting information corresponding to each reference signal;

[0022] According to the maximum value of the rank indication in the reporting information corresponding to each reference signal and the measurement result, the reporting information including the rank indication corresponding to each reference signal is determined.

[0023] In combination with the first aspect or any one of the above possible implementations, in another possible implementation of the first aspect, the maximum value of the rank indication in the reporting information corresponding to each reference signal is equal to: the lower integer of the value obtained by dividing the value corresponding to the capability of the terminal device by the number of the multiple reference signals.

[0024] In combination with the first aspect or any of the foregoing possible implementations, in another possible implementation of the first aspect, the method further includes:

[0025] The terminal device receives first configuration information from a network side, where the first configuration information is used to indicate:

[0026] the maximum value of the rank indication in the reporting information corresponding to each reference signal; and / or,

[0027] The maximum value of the sum of the values ​​of the rank indicators in the reporting information corresponding to the multiple reference signals.

[0028] In combination with the first aspect or any one of the foregoing possible implementations, in another possible implementation of the first aspect, the first configuration information of different reference signals is distinguished by an index of the reference signal.

[0029] In combination with the first aspect or any one of the above possible implementations, in another possible implementation of the first aspect, the first configuration information is carried in the setting configuration of the reference signal, or is carried in a trigger signal that triggers the terminal device to measure the reference signal, or is carried in downlink control information DCI dedicated to the first configuration information.

[0030] In combination with the first aspect or any one of the foregoing possible implementations, in another possible implementation of the first aspect, the first configuration information of different reference signals is distinguished by an index of the reported information.

[0031] In combination with the first aspect or any one of the above possible implementations, in another possible implementation of the first aspect, the first configuration information is carried in the setting configuration of the reporting information, or is carried in a trigger signal that triggers the terminal device to report, or is carried in a DCI dedicated to the first configuration information.

[0032] In combination with the first aspect or any of the foregoing possible implementations, in another possible implementation of the first aspect, the method further includes:

[0033] The terminal device receives second configuration information from the network side, where the second configuration information includes the number of ports configured for each reference signal, and the sum of the number of ports configured for the multiple reference signals is less than or equal to a value corresponding to the capability of the terminal device.

[0034] In combination with the first aspect or any of the foregoing possible implementations, in another possible implementation of the first aspect, the method further includes:

[0035] The terminal device receives third configuration information from the network side, where the third configuration information is used to indicate that the reference signals that need to be measured are the multiple reference signals.

[0036] In a second aspect, a wireless communication method is provided, including:

[0037] The first transmitting node receives a first message sent by a terminal device, where the first message includes reporting information including a rank indication corresponding to a reference signal sent by the first transmitting node, and includes the rank indication included in reporting information corresponding to a reference signal sent by a second transmitting node;

[0038] According to the first message, the first transmitting node determines the number of transmission layers for sending downlink signals to the terminal device.

[0039] In combination with the second aspect, in a possible implementation manner of the second aspect, the first transmitting node determining, according to the first message, the number of transmission layers of the downlink signal sent to the terminal device includes:

[0040] According to the priority ranking of the first transmitting node and the second transmitting node and the first message, the first transmitting node determines the number of transmission layers for sending the downlink signal to the terminal device.

[0041] In combination with the second aspect or any one of the foregoing possible implementations, in another possible implementation of the second aspect, the determining, by the first transmitting node according to the priority sorting of the first transmitting node and the second transmitting node and the first message, the number of transmission layers of the downlink signal sent to the terminal device includes:

[0042] When the priority of the first transmitting node is higher than the priority of the second transmitting node, the value of the rank indication in the reporting information corresponding to the reference signal of the first transmitting node is determined as the number of the transmission layer for the first transmitting node to send the downlink signal to the terminal device.

[0043] In combination with the second aspect or any one of the foregoing possible implementations, in another possible implementation of the second aspect, the first transmitting node determining, according to the priority sorting of the first transmitting node and the second transmitting node and the first message, the number of transmission layers of the downlink signal sent to the terminal device, includes:

[0044] When the priority of the first transmitting node is lower than that of the second transmitting node, the difference between the maximum number of transmission layers supported by the terminal device and the value of the rank indication in the reporting information corresponding to the reference signal of the first transmitting node is determined as the number of transmission layers for sending the downlink signal to the terminal device.

[0045] In combination with the second aspect or any one of the foregoing possible implementations, in another possible implementation of the second aspect, the first transmitting node determines, according to the first message, the number of transmission layers of the downlink signal sent to the terminal device, including:

[0046] According to the first message, the first transmitting node negotiates with the second transmitting node on the number of transmission layers for sending the downlink signal to the terminal device.

[0047] In a third aspect, a terminal device is provided, which is used to execute the method in the first aspect or any possible implementation of the first aspect. Specifically, the terminal device includes a functional module for executing the method in the first aspect or any possible implementation of the first aspect.

[0048] In a fourth aspect, a transmitting node is provided, which is used to execute the method in the second aspect or any possible implementation of the second aspect. Specifically, the transmitting node includes a functional module for executing the method in the second aspect or any possible implementation of the second aspect.

[0049] In a fifth aspect, a terminal device is provided, comprising a processor, a memory, and a transceiver. The processor, the memory, and the transceiver communicate with each other through an internal connection path to transmit control and / or data signals, so that the terminal device executes the method in the first aspect or any possible implementation of the first aspect.

[0050] In a sixth aspect, a transmitting node is provided, comprising a processor, a memory, and a transceiver. The processor, the memory, and the transceiver communicate with each other through an internal connection path to transmit control and / or data signals, so that the transmitting node executes the method in the second aspect or any possible implementation of the second aspect.

[0051] In a seventh aspect, a computer-readable medium is provided for storing a computer program, wherein the computer program includes instructions for executing any one of the above methods or any possible implementations.

[0052] In an eighth aspect, a computer program product comprising instructions is provided, which, when executed on a computer, enables the computer to execute any one of the above methods or any possible implementation methods.

[0053] Therefore, in an embodiment of the present application, the terminal device measures multiple reference signals, and the terminal device determines the reporting information including the rank indication corresponding to each reference signal in the multiple reference signals based on the measurement results, and the terminal device sends the reporting information including the rank indication corresponding to each reference signal to the network side, thereby realizing the measurement and feedback of reference signals supporting multiple downlink channel transmissions. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0055] Figure 1 is a schematic diagram of a wireless communication system according to an embodiment of the present application.

[0056] Figure 2 It is a schematic flowchart of a wireless communication method according to an embodiment of the present application.

[0057] Figure 3 It is a schematic flowchart of a wireless communication method according to an embodiment of the present application.

[0058] Figure 4 It is a schematic block diagram of a terminal device according to an embodiment of the present application.

[0059] Figure 5 It is a schematic block diagram of a transmitting node according to an embodiment of the present application.

[0060] Figure 6 is a schematic block diagram of a system chip according to an embodiment of the present application.

[0061] Figure 7 It is a schematic block diagram of a communication device according to an embodiment of the present application. DETAILED DESCRIPTION

[0062] The following will describe the technical solutions in the embodiments of the present application in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0063] Optionally, the technical solutions of the embodiments of the present application can be applied to various communication systems, such as: Global System of Mobile communication (GSM) system, Code Division Multiple Access (CDMA) system, Wideband Code Division Multiple Access (WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, LTE Frequency Division Duplex (FDD) system, LTE Time Division Duplex (TDD) system, Universal Mobile Telecommunication System (UMTS) system, Worldwide Interoperability for Microwave Access (WiMAX) system or future 5G system (also referred to as New Radio (NR) system).

[0064] Figure 1 is a schematic diagram of a wireless communication system according to an embodiment of the present application.

[0065] like Figure 1 As shown, multiple transmitting nodes (eg, transmitting node 1 and transmitting node 2) may jointly send a downlink channel or signal to a terminal device.

[0066] Alternatively, the network side may send a downlink channel or signal to the terminal device via multiple transmit beams (eg, transmit beam 1 and transmit beam 2).

[0067] The multiple transmit beams may come from the same transmitting node or from different transmitting nodes.

[0068] Optionally, Figure 1The terminal device in the term may refer to an access terminal, a user equipment (UE), a user unit, a user station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless communication device, a user agent or a user device. The access terminal may be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device, a terminal device in a future 5G network or a terminal device in a future evolved PLMN, etc.

[0069] Optionally, Figure 1 The transmitting node shown can be a device that communicates with a terminal device. The transmitting node can provide communication coverage for a specific geographical area, and can communicate with a terminal device (such as a UE) located in the coverage area. Optionally, the transmitting node can be a base station (Base Transceiver Station, BTS) in a GSM system or a CDMA system, or a base station (NodeB, NB) in a WCDMA system, or an evolved base station (EvolutionalNode B, eNB or eNodeB) in an LTE system, or a wireless controller in a cloud radio access network (Cloud Radio Access Network, CRAN), or the transmitting node can be a relay station, an access point, a vehicle-mounted device, a wearable device, a network-side device in a future 5G network, or a network device in a future evolved public land mobile network (Public Land Mobile Network, PLMN), etc.

[0070] Optionally, the transmitting node may be referred to as a Transmission Reception Point (TRP).

[0071] Optionally, the multiple transmitting nodes in the embodiment of the present application may be controlled by one control device. Alternatively, there is one main transmitting node among the multiple transmitting nodes in the embodiment of the present application to control other transmitting nodes.

[0072] Optionally, the 5G system or network may also be referred to as a New Radio (NR) system or network.

[0073] It should be understood that the terms "system" and "network" are often used interchangeably in this article. The term "and / or" in this article is only a description of the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0074] Figure 2 is a schematic flow chart of a wireless communication method 200 according to an embodiment of the present application. The method 100 may optionally be applied to Figure 1 The system shown in FIG. Figure 2 As shown, the method 100 includes at least part of the following contents.

[0075] In 110, the terminal device measures a plurality of reference signals.

[0076] Optionally, the reference signal may be a channel state information reference signal (Channel State Information Reference Signal, CSI-RS).

[0077] Optionally, the multiple reference signals come from multiple transmitting nodes that jointly serve the terminal device or from multiple downlink transmit beams.

[0078] Optionally, the multiple reference signals correspond to the multiple transmitting nodes one by one, that is, one transmitting node sends one reference signal. Wherein, one reference signal refers to a downlink signal sent through one configuration.

[0079] Optionally, the multiple downlink beams may originate from the same transmitting node, or different downlink beams may originate from different transmitting nodes.

[0080] Optionally, multiple downlink transmit beams may correspond one-to-one to multiple reference signals, that is, one reference signal is sent via one downlink transmit beam.

[0081] In 120, the terminal device determines, according to the measurement result, reporting information including a rank indication corresponding to each reference signal in the multiple reference signals.

[0082] Optionally, the value of the rank indication is used to indicate the maximum number of transmission layers supported by the terminal device on the transmission channel corresponding to the reference signal.

[0083] In 130, the terminal device sends reporting information including a rank indication corresponding to each reference signal to the network side.

[0084] Optionally, the terminal device may measure the multiple measurement signals at different times. Alternatively, the terminal device may report the reference signal at different times.

[0085] Optionally, the feedback information of the embodiment of the present application may include a rank indication, and an index of a reference signal or an index of reporting information or an index of a transmitting node.

[0086] Optionally, when multiple reference signals come from different transmitting nodes, the terminal device may send reporting information corresponding to the reference signal sent by the transmitting node to each transmitting node respectively.

[0087] Optionally, when multiple reference signals come from different transmission beams, the terminal device may respectively send reporting information corresponding to the reference signal sent by the transmitting end itself to the transmitting end of the transmission beam.

[0088] Optionally, the value of the rank indication in the reporting information corresponding to each reference signal is less than or equal to the value corresponding to the capability of the terminal device, and / or less than or equal to the value of the number of reference signal ports configured for the terminal device.

[0089] The value corresponding to the capability of the terminal device may be the maximum number of transmission layers supported by the terminal device. Then the value of the rank indication in the reporting information corresponding to each reference signal is less than or equal to the maximum number of transmission layers supported by the terminal device.

[0090] The reference signal port quantity value configured for the terminal device (factory pre-configuration or network pre-configuration) may be the sum of the number of ports that the terminal device can use for all reference signals.

[0091] Optionally, the sum of the values ​​of the rank indications in the reporting information corresponding to the multiple reference signals is less than or equal to the value corresponding to the capability of the terminal device, and / or less than or equal to the value of the number of reference signal ports configured for the terminal device.

[0092] Specifically, the value of the rank indication in the reporting information corresponding to the multiple reference signals is less than or equal to the maximum number of transmission layers supported by the terminal device, and / or less than or equal to the value of the number of reference signal ports configured for the terminal device.

[0093] Therefore, in this implementation, when multiple transmitting nodes are connected to the terminal device, if the connection (backhaul) between the multiple transmitting nodes is not ideal, that is, the transmitting nodes cannot quickly exchange information, it can avoid the number of layers of data streams sent by the multiple transmitting nodes to the terminal device exceeding the capability of the terminal device, thereby avoiding the waste of system resources caused by the terminal device being unable to demodulate or discarding part of the data.

[0094] Optionally, in an embodiment of the present application, the terminal device may also be configured with a port number for each reference signal. In this case, the value of the rank indication in the reporting information corresponding to each reference signal is less than the port number configured for the reference signal itself.

[0095] Optionally, the terminal device sends a first message to a transmitter of at least one first reference signal among the multiple reference signals, the first message including reporting information including a rank indication corresponding to the first reference signal; the first message also includes: the rank indication included in the reporting information corresponding to at least one second reference signal among the multiple reference signals. Further, other information included in the reporting information corresponding to the second reference signal may also be included.

[0096] Specifically, while sending reporting information corresponding to at least one reference signal to the transmitter of the reference signal, reporting information corresponding to other one or more reference signals (which may be sent by other transmitters) may also be sent to the transmitter of the reference signal.

[0097] For example, there are three reference signals, for example, reference signal 1, reference signal 2 and reference signal 3 from transmitting node 1, transmitting node 2 and transmitting node 3 respectively. The reporting information corresponding to reference signal 1 can be sent to transmitting node 1, the reporting information corresponding to reference signal 2 and reference signal 3 can be sent to transmitting node 2, and the reporting information of reference signal 1, reference signal 2 and reference signal 3 can be sent to transmitting node 3.

[0098] Whether to send reporting information corresponding to other reference signals to the transmitter of a certain reference signal may be determined according to actual conditions, for example, according to the priority of the transmitting node. For example, the higher the priority, the less it is necessary to send reporting information corresponding to other reference signals to it. In the above example, the priority of transmitting node 1 is higher than that of transmitting node 2, and the priority of transmitting node 2 is higher than that of transmitting node 3.

[0099] When sending reporting information corresponding to at least one reference signal to the transmitter of the reference signal, and also sending reporting information corresponding to one or more other reference signals (which may be sent by other transmitters) to the transmitter of the reference signal, the sum of the values ​​of the rank indication in the reporting information corresponding to the multiple reference signals is greater than the value corresponding to the capability of the terminal device.

[0100] Optionally, the value of the rank indication in the reporting information corresponding to each reference signal is less than or equal to the maximum value of the rank indication in the corresponding reporting information; or,

[0101] The sum of the values ​​of the rank indicators in the reporting information corresponding to the multiple reference signals is less than or equal to the maximum value of the sum of the values ​​of the rank indicators in the reporting information corresponding to the multiple reference signals.

[0102] Optionally, the terminal device determines the maximum value of the rank indication in the reporting information corresponding to each reference signal according to its own capability; and determines the rank indication in the reporting information corresponding to each reference signal according to the maximum value of the rank indication in the reporting information corresponding to each reference signal and the measurement result.

[0103] The maximum value of the rank indication in the reporting information corresponding to each reference signal may be equal to: the value corresponding to the capability of the terminal device divided by the number of the multiple reference signals rounded down.

[0104] The number of the multiple reference signals may be equal to the number of PDCCHs that need to be received simultaneously, or equal to the number of PDSCHs that need to be received simultaneously, or the sum of the number of PDCCHs and PDSCHs that need to be received simultaneously (PDCCH and PDSCH need to be received simultaneously).

[0105] Optionally, the terminal device receives first configuration information from the network side, and the first configuration information is used to indicate: the maximum value of the rank indication in the reporting information corresponding to each reference signal; and / or the maximum value of the sum of the values ​​of the rank indication in the reporting information corresponding to the multiple reference signals.

[0106] For ease of understanding, the following describes how to send configuration information of different reference signals.

[0107] In one implementation, the first configuration information of different reference signals is distinguished by the index of the reference signal.

[0108] In this implementation, the first configuration information can be carried in the setting configuration of the reference signal, or carried in the trigger signal that triggers the terminal device to measure the reference signal, or carried in downlink control information (Downlink Control Information, DCI) dedicated to the first configuration information.

[0109] The setting configuration of the reference signal may be a CSI-RS resource setting configuration or a CSI-RS setting configuration, which is used to configure how to receive the reference signal.

[0110] In one implementation, the first configuration information of different reference signals is distinguished by an index of the reported information.

[0111] In this implementation, the first configuration information is carried in the setting configuration of the reporting information, or in the trigger signal that triggers the terminal device to report, or in the DCI dedicated to the first configuration information. The setting configuration of the reporting information can be called reporting setting configuration, which is used to configure how to send the reporting information.

[0112] The following is an example of the bearer method for sending the first configuration information.

[0113] For example, in the NR system, the network side can use two transmitting nodes to send different NR-PDCCH and / or NR-PDSCH to the terminal device. To support this transmission scheme, the network side can use different transmitting nodes to send different CSI-RS (respectively denoted as CSI-RS 1 and CSI-RS 2, and different CSI-RS are distinguished by different CSI-RS resourceindicators), and configure the terminal device to measure these two signals (there will be corresponding CSI-RS resourcesetting configuration and reporting setting configuration). In order to avoid scheduling layers that exceed the demodulation capability of the UE, the NW can process in the following two ways:

[0114] In one embodiment, the network side configures the maximum feedback RI value (N1, N2) for CSI-RS 1 and CSI-RS 2 respectively, for example, the maximum feedback RI value (N1, N2) is specified in the CSI-RS setting configuration; or the maximum feedback RI value (N1, N2) is specified in the trigger signal of the signal measurement, or the maximum feedback RI value (N1, N2) is specified in a dedicated DCI.

[0115] In one embodiment, the network side configures the maximum feedback RI value (N1, N2) for the two reporting information corresponding to the two CSI-RS respectively. For example, the maximum feedback value RI value (N1, N2) is specified in the Reporting setting configuration, or the maximum feedback value RI value (N1, N2) is specified in the trigger signal of the reporting information, or the maximum feedback value RI value (N1, N2) is specified in the dedicated DCI.

[0116] For another example, in the NR system, the network side can use two transmitting nodes to send different NR-PDCCH and / or NR-PDSCH to the terminal device. To support this transmission scheme, the network side can use different transmitting nodes to send different CSI-RS (respectively recorded as CSI-RS 1, CSI-RS 2, and different CSI-RS are distinguished by different CSI-RS resourceindicators), and configure the terminal device to measure these two signals (there will be corresponding CSI-RS resourcesetting configuration and reporting setting configuration). In order to avoid scheduling layers that exceed the demodulation capability of the UE, the NW can process in the following two ways:

[0117] In one method, the network side configures the maximum value of the sum of the feedback RI values ​​of the two reference signals, CSI-RS 1 and CSI-RS 2, respectively. For example, the maximum value of the sum of the feedback RI values ​​is specified in the CSI-RS setting configuration; or the maximum value of the sum of the feedback RI values ​​is specified in the trigger signal of the signal measurement, or the maximum value of the sum of the feedback RI values ​​is specified in a dedicated DCI.

[0118] In one method, the network side configures the maximum value of the sum of the feedback RI values ​​of the two reference signals for the two reporting information corresponding to the two CSI-RSs, for example, the maximum value of the sum of the feedback RI values ​​is specified in the Reporting setting configuration, or the maximum value of the sum of the feedback RI values ​​is specified in the trigger signal of the reporting information, or the maximum value of the sum of the feedback RI values ​​is specified in the dedicated DCI.

[0119] Optionally, the terminal device receives second configuration information from the network side, the second configuration information including the number of ports configured for each reference signal, and the sum of the number of ports configured for the multiple reference signals is less than or equal to a value corresponding to the capability of the terminal device.

[0120] For example, the network side can use two transmitting nodes to send different NR-PDCCH and NR-PDSCH to the terminal device. To support this transmission scheme, NW will send different CSI-RS on different transmitting nodes (the corresponding port numbers are recorded as P1 and P2 respectively, and different CSI-RS are distinguished by different CSI-RS resource indicators), and configure the terminal device to measure these two signals (there will be corresponding CSI-RS resource setting configuration and reporting setting configuration). In order to avoid scheduling layers that exceed the demodulation capability of the UE, the network side configures the sum of all ports P1+P2 configured for the terminal device to measure and report CSI does not exceed the maximum capability of the UE.

[0121] Optionally, the terminal device receives third configuration information from the network side, where the third configuration information is used to indicate that the reference signals to be measured are the multiple reference signals.

[0122] Optionally, the number of reference signals that need to be measured configured by the third configuration information is equal to the number of PDCCHs that need to be received simultaneously, or equal to the number of PDSCHs that need to be received simultaneously, or the sum of the numbers of PDCCHs and PDSCHs that need to be received simultaneously.

[0123] Optionally, in an embodiment of the present application, the network device may further configure a constraint condition for the rank indication, for example, a maximum value of the rank indication of a certain reference signal or a maximum value of the sum of the rank indications of multiple reference signals.

[0124] Optionally, after the terminal device enters the network, the default state is to receive one PDCCH (or PDSCH). Under the configuration of the network, it can start to enter the state of receiving multiple PDCCHs (or PDSCHs).

[0125] Therefore, in an embodiment of the present application, the terminal device measures multiple reference signals, and the terminal device determines the reporting information including the rank indication corresponding to each reference signal in the multiple reference signals based on the measurement results, and the terminal device sends the reporting information including the rank indication corresponding to each reference signal to the network side, thereby realizing the measurement and feedback of reference signals supporting multiple downlink channel transmissions.

[0126] Figure 3 2 is a schematic flow chart of a wireless communication method 200 according to an embodiment of the present application. The method 200 includes at least part of the following contents.

[0127] In 210, the first transmitting node receives a first message sent by a terminal device, the first message including reporting information including a rank indication corresponding to a reference signal sent by the first transmitting node, and the rank indication in the reporting information corresponding to the reference signal sent by the second transmitting node.

[0128] In 220, based on the first message, the first transmitting node determines the number of transmission layers for sending downlink signals to the terminal device.

[0129] In one implementation, based on the priority ranking of the first transmitting node and the second transmitting node and the first message, the first transmitting node determines the number of transmission layers for sending the downlink signal to the terminal device.

[0130] Optionally, when the priority of the first transmitting node is higher than the priority of the second transmitting node, the value of the rank indication in the reporting information corresponding to the reference signal of the first transmitting node is determined as the number of the transmission layer for the first transmitting node to send the downlink signal to the terminal device.

[0131] Optionally, when the priority of the first transmitting node is lower than that of the second transmitting node, the difference between the maximum number of transmission layers supported by the terminal device and the value of the rank indication in the reporting information corresponding to the reference signal of the first transmitting node is determined as the number of transmission layers for sending the downlink signal to the terminal device.

[0132] For example, in the NR system, the network side can use two transmitting nodes to send different NR-PDCCH and NR-PDSCH to the terminal device. To support this transmission scheme, the network side can send different CSI-RS on different transmitting nodes (respectively denoted as CSI-RS 1 and CSI-RS 2, and different CSI-RS are distinguished by different CSI-RS resource indexes or indicators), and configure the terminal device to measure these two signals (there will be corresponding CSI-RS resource setting configuration and reporting setting configuration). In order to avoid scheduling the number of transmission layers (layers) that exceed the demodulation capability of the terminal device, the terminal device puts the two RIs in the same message in the report, such as the following:

[0133] The message 1 sent to the transmitting node 1 includes RI1 and RI2, and the message 1 sent to the transmitting node 1 includes RI2; or,

[0134] The message 1 sent to the transmitting node 1 includes RI2, and the message 1 sent to the transmitting node 1 includes RI1 and RI2; or,

[0135] The message 1 sent to the transmitting node 1 includes RI1 and RI2. The message 1 sent to the transmitting node 1 includes RI1 and RI2.

[0136] The network side can perform corresponding operations in a predetermined manner. For example, the network side can stipulate that the priority of transmitting node 1 is low. When transmitting node 1 receives RI1 and RI2, assuming that transmitting node 2 sends a downlink signal to the terminal device according to RI2, transmitting node 1 determines the number of layers of the data it sends according to the capability of the terminal device and RI2 (<= the number of layers N-RI corresponding to the maximum capability of the UE).

[0137] In one implementation, based on the first message, the first transmitting node negotiates with the second transmitting node on the number of transmission layers for sending the downlink signal to the terminal device.

[0138] Therefore, in an embodiment of the present application, the first transmitting node determines the number of transmission layers of the downlink signal based on the reporting information including the rank indication corresponding to the reference signal sent by itself and the reporting information including the rank indication corresponding to the reference signals sent by other transmitting nodes. This can avoid the network side scheduling too many transmission layers for the terminal device and exceeding the capacity of the terminal device, thereby avoiding the waste of system resources caused by the terminal device being unable to demodulate or discarding part of the data.

[0139] Figure 4 is a schematic block diagram of a terminal device 300 according to an embodiment of the present application. Figure 4 As shown, the terminal device 300 includes a processing unit 310 and a communication unit 320; wherein,

[0140] The processing unit 310 is used to: measure multiple reference signals; determine, according to the measurement result, reporting information including a rank indication corresponding to each reference signal in the multiple reference signals;

[0141] The communication unit 320 is used to send reporting information including a rank indication corresponding to each reference signal to the network side.

[0142] Optionally, the multiple reference signals come from multiple transmitting nodes or multiple downlink transmit beams that jointly serve the terminal device.

[0143] Optionally, the communication unit 320 is further configured to:

[0144] Reporting information including a rank indication corresponding to the reference signal itself is sent to a transmitter of the reference signal respectively.

[0145] Optionally, the value of the rank indication in the reporting information corresponding to each reference signal is less than or equal to the value corresponding to the capability of the terminal device, and / or less than or equal to the port quantity value corresponding to each reference signal configured for the terminal device.

[0146] Optionally, the sum of the values ​​of the rank indication in the reporting information corresponding to the multiple reference signals is less than or equal to the value corresponding to the capability of the terminal device.

[0147] Optionally, the communication unit 320 is further configured to:

[0148] Sending a first message to a transmitter of at least one first reference signal among the multiple reference signals, where the first message includes reporting information corresponding to the first reference signal including a rank indication;

[0149] The first message further includes: a rank indication included in reporting information corresponding to at least one second reference signal among the multiple reference signals.

[0150] Optionally, the sum of the values ​​of the rank indication in the reporting information corresponding to the multiple reference signals is greater than the value corresponding to the capability of the terminal device.

[0151] Optionally, a value of a rank indication in reporting information corresponding to each reference signal is less than or equal to a maximum value of a rank indication in respective corresponding reporting information; or,

[0152] The sum of the values ​​of the rank indicators in the reporting information corresponding to the multiple reference signals is less than or equal to the maximum value of the sum of the values ​​of the rank indicators in the reporting information corresponding to the multiple reference signals.

[0153] Optionally, the processing unit 310 is further configured to:

[0154] Determine, according to its own capability, a maximum value of the rank indication in the reporting information corresponding to each reference signal;

[0155] According to the maximum value of the rank indication in the reporting information corresponding to each reference signal and the measurement result, the reporting information including the rank indication corresponding to each reference signal is determined.

[0156] Optionally, the maximum value of the rank indication in the reporting information corresponding to each reference signal is equal to: the value corresponding to the capability of the terminal device divided by the number of the multiple reference signals rounded down.

[0157] Optionally, the communication unit 320 is further configured to:

[0158] The terminal device receives first configuration information from a network side, where the first configuration information is used to indicate:

[0159] the maximum value of the rank indication in the reporting information corresponding to each reference signal; and / or,

[0160] The maximum value of the sum of the values ​​of the rank indicators in the reporting information corresponding to the multiple reference signals.

[0161] Optionally, the first configuration information of different reference signals is distinguished by an index of the reference signal.

[0162] Optionally, the first configuration information is carried in the setting configuration of the reference signal, or is carried in a trigger signal that triggers the terminal device to measure the reference signal, or is carried in downlink control information DCI dedicated to the first configuration information.

[0163] Optionally, the first configuration information of different reference signals is distinguished by an index of the reporting information.

[0164] Optionally, the first configuration information is carried in the setting configuration of the reporting information, or is carried in a trigger signal that triggers the terminal device to report, or is carried in a DCI dedicated to the first configuration information.

[0165] Optionally, the communication unit 320 is further configured to:

[0166] Receive second configuration information from the network side, where the second configuration information includes the number of ports configured for each reference signal, and the sum of the number of ports configured for the multiple reference signals is less than or equal to a value corresponding to the capability of the terminal device.

[0167] Optionally, the communication unit 320 is further configured to:

[0168] Third configuration information is received from a network side, where the third configuration information is used to indicate that reference signals that need to be measured are the multiple reference signals.

[0169] Optionally, the terminal device 300 may correspond to the terminal device in the method embodiment, and may implement corresponding operations of the terminal device, which will not be described herein for the sake of brevity.

[0170] Figure 5 4 is a schematic block diagram of a transmitting node 400 according to an embodiment of the present application. The transmitting node 400 is a first transmitting node, wherein the transmitting node includes a communication unit 410 and a processing unit 420; wherein,

[0171] The communication unit 410 is used to: receive a first message sent by a terminal device, where the first message includes reporting information including a rank indication corresponding to a reference signal sent by the first transmitting node, and includes a rank indication included in reporting information corresponding to a reference signal sent by a second transmitting node;

[0172] The processing unit 420 is used to determine the number of transmission layers for sending downlink signals to the terminal device according to the first message.

[0173] Optionally, the processing unit 420 is further configured to:

[0174] The number of transmission layers for sending the downlink signal to the terminal device is determined according to the priority ranking of the first transmitting node and the second transmitting node and the first message.

[0175] Optionally, the processing unit 420 is further configured to:

[0176] When the priority of the first transmitting node is higher than the priority of the second transmitting node, the value of the rank indication in the reporting information corresponding to the reference signal of the first transmitting node is determined as the number of the transmission layer for the first transmitting node to send the downlink signal to the terminal device.

[0177] Optionally, the processing unit 420 is further configured to:

[0178] When the priority of the first transmitting node is lower than that of the second transmitting node, the difference between the maximum number of transmission layers supported by the terminal device and the value of the rank indication in the reporting information corresponding to the reference signal of the first transmitting node is determined as the number of transmission layers for sending the downlink signal to the terminal device.

[0179] Optionally, the processing unit 420 is further configured to:

[0180] According to the first message, negotiate with the second transmitting node on the number of transmission layers for sending the downlink signal to the terminal device.

[0181] Optionally, the transmitting node 400 may correspond to the first transmitting node in the method embodiment, and may implement corresponding operations of the first transmitting node, which will not be described herein for the sake of brevity.

[0182] Figure 6 It is a schematic structural diagram of the system chip 500 according to an embodiment of the present application. Figure 6 The system chip 500 includes an input interface 501 , an output interface 502 , and the processor 503 and the memory 504 can be connected via an internal communication connection line. The processor 503 is used to execute the code in the memory 804 .

[0183] Optionally, when the code is executed, the processor 503 implements the method performed by the transmitting node in the method embodiment. For the sake of brevity, it will not be described here.

[0184] Optionally, when the code is executed, the processor 503 implements the method executed by the terminal device in the method embodiment. For the sake of brevity, it will not be described in detail here.

[0185] Figure 7 is a schematic block diagram of a communication device 600 according to an embodiment of the present application. Figure 7 As shown, the communication device 600 includes a processor 610 and a memory 620. The memory 620 may store program codes, and the processor 610 may execute the program codes stored in the memory 620.

[0186] Alternatively, if Figure 7 As shown, the communication device 600 may include a transceiver 630, and the processor 610 may control the transceiver 630 to communicate externally.

[0187] Optionally, the processor 610 may call program codes stored in the memory 620 to execute corresponding operations of the transmitting node in the method embodiment, which will not be described in detail here for the sake of brevity.

[0188] Optionally, the processor 610 may call program codes stored in the memory 620 to execute corresponding operations of the terminal device in the method embodiment, which will not be described in detail here for the sake of brevity.

[0189] It should be understood that the processor of the embodiment of the present application may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method embodiment can be completed by the hardware integrated logic circuit or software instructions in the processor. The above processor can be a general processor, a digital signal processor (Digital Signal Processor, DSP), an application-specific integrated circuit (Application Specific Integrated Circuit, ASIC), a field programmable gate array (Field Programmable Gate Array, FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The methods, steps and logic block diagrams disclosed in the embodiments of the present application can be implemented or executed. The general processor can be a microprocessor or the processor can also be any conventional processor. The steps of the method disclosed in the embodiment of the present application can be directly embodied as a hardware decoding processor to perform, or the hardware and software modules in the decoding processor are combined and performed. The software module can be located in a random access memory, a flash memory, a read-only memory, a programmable read-only memory or an electrically erasable programmable memory, a register, and other mature storage media in the art. The storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.

[0190] It can be understood that the memory in the embodiments of the present application can be a volatile memory or a non-volatile memory, or can include both volatile and non-volatile memories. Among them, the non-volatile memory can be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory can be a random access memory (RAM), which is used as an external cache. By way of example and not limitation, many forms of RAM are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct RAM bus random access memory (DR RAM). It should be noted that the memory of the systems and methods described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0191] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0192] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0193] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0194] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0195] 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 separately, or two or more units may be integrated into one unit.

[0196] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application can be essentially or partly embodied in the form of a software product that contributes to the prior art. The computer software product is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0197] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A wireless communication method, comprising: The terminal device measures a plurality of reference signals; The terminal device determines, according to the measurement result, reporting information including a rank indication corresponding to each reference signal in the multiple reference signals; The terminal device sends reporting information including a rank indication corresponding to each reference signal to the network side, It is characterized in that The method further comprises: The terminal device receives first configuration information from the network side, where the first configuration information is used to indicate: the maximum value of the rank indication in the reporting information corresponding to each reference signal; and / or, The maximum value of the sum of the values ​​of the rank indicators in the reporting information corresponding to the multiple reference signals.

2. The method according to claim 1, characterized in that The multiple reference signals come from multiple transmitting nodes or multiple downlink transmission beams that jointly serve the terminal device.

3. The method according to claim 1 or 2, characterized in that: The terminal device sends reporting information including a rank indication corresponding to each reference signal to the network side, including: The terminal devices respectively send reporting information including a rank indication corresponding to the reference signal itself to the transmitter of the reference signal.

4. The method according to claim 3, characterized in that The value of the rank indication in the reporting information corresponding to each reference signal is less than or equal to the value corresponding to the capability of the terminal device, and / or less than or equal to the value of the number of ports corresponding to each reference signal configured for the terminal device.

5. The method according to claim 4, characterized in that The sum of the values ​​of the rank indication in the reporting information corresponding to the multiple reference signals is less than or equal to the value corresponding to the capability of the terminal device.

6. The method according to claim 4, characterized in that The terminal device sends reporting information including a rank indication corresponding to each reference signal to the network side, including: Sending a first message to a transmitter of at least one first reference signal among the multiple reference signals, where the first message includes reporting information corresponding to the first reference signal including a rank indication; The first message further includes: a rank indication included in reporting information corresponding to at least one second reference signal among the multiple reference signals.

7. According to the method of claim 6, the sum of the values ​​of the rank indication in the reporting information corresponding to the multiple reference signals is greater than the value corresponding to the capability of the terminal device.

8. The method according to claim 6, characterized in that The value of the rank indication in the reporting information corresponding to each reference signal is less than or equal to the maximum value of the rank indication in the corresponding reporting information; or, A sum of the values ​​of the rank indicators in the reporting information corresponding to the multiple reference signals is less than or equal to a maximum value of the sum of the values ​​of the rank indicators in the reporting information corresponding to the multiple reference signals.

9. The method according to claim 8, characterized in that The terminal device determines, according to the measurement result, reporting information including a rank indication corresponding to each reference signal in the multiple reference signals, including: The terminal device determines, according to its own capability, a maximum value of the rank indication in the reporting information corresponding to each reference signal; According to the maximum value of the rank indication in the reporting information corresponding to each reference signal and the measurement result, the reporting information including the rank indication corresponding to each reference signal is determined.

10. The method according to claim 9, characterized in that The maximum value of the rank indication in the reporting information corresponding to each reference signal is equal to: the value corresponding to the capability of the terminal device divided by the number of the multiple reference signals rounded down.

11. The method according to claim 1, characterized in that: The first configuration information of different reference signals is distinguished by the index of the reference signal.

12. The method according to claim 11, characterized in that The first configuration information is carried in the setting configuration of the reference signal, or in a trigger signal that triggers the terminal device to measure the reference signal, or in downlink control information DCI dedicated to the first configuration information.

13. The method according to claim 1, characterized in that The first configuration information of different reference signals is distinguished by the index of the reporting information.

14. The method according to claim 13, characterized in that The first configuration information is carried in the setting configuration of the reporting information, or is carried in a trigger signal that triggers the terminal device to report, or is carried in a DCI dedicated to the first configuration information.

15. The method according to claim 6, characterized in that The method further comprises: The terminal device receives second configuration information from the network side, where the second configuration information includes the number of ports configured for each reference signal, and the sum of the number of ports configured for the multiple reference signals is less than or equal to a value corresponding to the capability of the terminal device.

16. The method according to claim 15, characterized in that The method further comprises: The terminal device receives third configuration information from the network side, where the third configuration information is used to indicate that the reference signals that need to be measured are the multiple reference signals.

17. A wireless communication method, comprising: The first transmitting node receives a first message sent by a terminal device, where the first message includes reporting information including a rank indication corresponding to a reference signal sent by the first transmitting node, and includes the rank indication included in reporting information corresponding to a reference signal sent by a second transmitting node; According to the first message, the first transmitting node determines the number of transmission layers for sending downlink signals to the terminal device, It is characterized in that The method further comprises: The first transmitting node sends first configuration information to the terminal device, where the first configuration information is used to indicate: a maximum value of a rank indicator in reporting information corresponding to each of the reference signal sent by the first transmitting node and the reference signal sent by the second transmitting node; and / or, The maximum value of the sum of the values ​​of the rank indicator in the reporting information corresponding to the reference signal sent by the first transmitting node and the reference signal sent by the second transmitting node.

18. The method according to claim 17, characterized in that The first transmitting node determining, according to the first message, the number of transmission layers of the downlink signal sent to the terminal device, includes: According to the priority ranking of the first transmitting node and the second transmitting node and the first message, the first transmitting node determines the number of transmission layers for sending the downlink signal to the terminal device.

19. The method according to claim 18, characterized in that The first transmitting node determining, according to the priority sorting of the first transmitting node and the second transmitting node and the first message, the number of transmission layers of the downlink signal sent to the terminal device, comprises: When the priority of the first transmitting node is higher than the priority of the second transmitting node, the value of the rank indication in the reporting information corresponding to the reference signal of the first transmitting node is determined as the number of the transmission layer for the first transmitting node to send the downlink signal to the terminal device.

20. The method according to claim 18, characterized in that The first transmitting node determining, according to the priority sorting of the first transmitting node and the second transmitting node and the first message, the number of transmission layers of the downlink signal sent to the terminal device, comprises: When the priority of the first transmitting node is lower than that of the second transmitting node, the difference between the maximum number of transmission layers supported by the terminal device and the value of the rank indication in the reporting information corresponding to the reference signal of the first transmitting node is determined as the number of transmission layers for sending the downlink signal to the terminal device.

21. The method according to claim 17, characterized in that The first transmitting node determines, according to the first message, the number of transmission layers of the downlink signal sent to the terminal device, including: According to the first message, the first transmitting node negotiates with the second transmitting node on the number of transmission layers for sending the downlink signal to the terminal device.

22. A terminal device, comprising a processing unit and a communication unit; wherein: The processing unit is used to: measure multiple reference signals; determine, according to the measurement result, reporting information including a rank indication corresponding to each reference signal in the multiple reference signals; The communication unit is used to: send reporting information including a rank indication corresponding to each reference signal to the network side, It is characterized in that The communication unit is further configured to: The terminal device receives first configuration information from the network side, where the first configuration information is used to indicate: the maximum value of the rank indication in the reporting information corresponding to each reference signal; and / or, The maximum value of the sum of the values ​​of the rank indicators in the reporting information corresponding to the multiple reference signals.

23. The terminal device according to claim 22, characterized in that: The multiple reference signals come from multiple transmitting nodes or multiple downlink transmission beams that jointly serve the terminal device.

24. The terminal device according to claim 22 or 23, characterized in that: The communication unit is further configured to: Reporting information including a rank indication corresponding to the reference signal itself is sent to a transmitter of the reference signal respectively.

25. The terminal device according to claim 24, characterized in that: The value of the rank indication in the reporting information corresponding to each reference signal is less than or equal to the value corresponding to the capability of the terminal device, and / or less than or equal to the value of the number of ports corresponding to each reference signal configured for the terminal device.

26. The terminal device according to claim 25, characterized in that: The sum of the values ​​of the rank indication in the reporting information corresponding to the multiple reference signals is less than or equal to the value corresponding to the capability of the terminal device.

27. The terminal device according to claim 25, characterized in that: The communication unit is further configured to: Sending a first message to a transmitter of at least one first reference signal among the multiple reference signals, where the first message includes reporting information corresponding to the first reference signal including a rank indication; The first message further includes: a rank indication included in reporting information corresponding to at least one second reference signal among the multiple reference signals.

28. According to the terminal device according to claim 27, the sum of the values ​​of the rank indication in the reporting information corresponding to the multiple reference signals is greater than the value corresponding to the capability of the terminal device.

29. The terminal device according to claim 27, characterized in that: The value of the rank indication in the reporting information corresponding to each reference signal is less than or equal to the maximum value of the rank indication in the corresponding reporting information; or, The sum of the values ​​of the rank indicators in the reporting information corresponding to the multiple reference signals is less than or equal to the maximum value of the sum of the values ​​of the rank indicators in the reporting information corresponding to the multiple reference signals.

30. The terminal device according to claim 29, characterized in that: The processing unit is further configured to: Determine, according to its own capability, a maximum value of the rank indication in the reporting information corresponding to each reference signal; According to the maximum value of the rank indication in the reporting information corresponding to each reference signal and the measurement result, the reporting information including the rank indication corresponding to each reference signal is determined.

31. The terminal device according to claim 30, characterized in that: The maximum value of the rank indication in the reporting information corresponding to each reference signal is equal to: the value corresponding to the capability of the terminal device divided by the number of the multiple reference signals rounded down.

32. The terminal device according to claim 22, characterized in that: The first configuration information of different reference signals is distinguished by the index of the reference signal.

33. The terminal device according to claim 32, characterized in that: The first configuration information is carried in the setting configuration of the reference signal, or in a trigger signal that triggers the terminal device to measure the reference signal, or in downlink control information DCI dedicated to the first configuration information.

34. The terminal device according to claim 22, characterized in that: The first configuration information of different reference signals is distinguished by the index of the reporting information.

35. The terminal device according to claim 34, characterized in that: The first configuration information is carried in the setting configuration of the reporting information, or is carried in a trigger signal that triggers the terminal device to report, or is carried in a DCI dedicated to the first configuration information.

36. The terminal device according to claim 27, characterized in that: The communication unit is further configured to: Receive second configuration information from the network side, where the second configuration information includes the number of ports configured for each reference signal, and the sum of the number of ports configured for the multiple reference signals is less than or equal to a value corresponding to the capability of the terminal device.

37. The terminal device according to claim 36, characterized in that: The communication unit is further configured to: Third configuration information is received from the network side, where the third configuration information is used to indicate that reference signals that need to be measured are the multiple reference signals.

38. A transmitting node, the transmitting node being a first transmitting node, wherein the transmitting node comprises a communication unit and a processing unit; wherein, The communication unit is used to: receive a first message sent by a terminal device, the first message including reporting information including a rank indication corresponding to a reference signal sent by the first transmitting node, and including a rank indication included in reporting information corresponding to a reference signal sent by a second transmitting node; The processing unit is used to: determine the number of transmission layers for sending downlink signals to the terminal device according to the first message, It is characterized in that The communication unit is further used to: send first configuration information to the terminal device, where the first configuration information is used to indicate: a maximum value of a rank indicator in reporting information corresponding to each of the reference signal sent by the first transmitting node and the reference signal sent by the second transmitting node; and / or, The maximum value of the sum of the values ​​of the rank indicator in the reporting information corresponding to the reference signal sent by the first transmitting node and the reference signal sent by the second transmitting node.

39. The transmitting node according to claim 38, characterized in that The processing unit is further configured to: The number of transmission layers for sending the downlink signal to the terminal device is determined according to the priority ranking of the first transmitting node and the second transmitting node and the first message.

40. The transmitting node according to claim 39, characterized in that The processing unit is further configured to: When the priority of the first transmitting node is higher than the priority of the second transmitting node, the value of the rank indication in the reporting information corresponding to the reference signal of the first transmitting node is determined as the number of the transmission layer for the first transmitting node to send the downlink signal to the terminal device.

41. The transmitting node according to claim 39, characterized in that The processing unit is further configured to: When the priority of the first transmitting node is lower than that of the second transmitting node, the difference between the maximum number of transmission layers supported by the terminal device and the value of the rank indication in the reporting information corresponding to the reference signal of the first transmitting node is determined as the number of transmission layers for sending the downlink signal to the terminal device.

42. The transmitting node according to claim 38, characterized in that The processing unit is further configured to: According to the first message, negotiate with the second transmitting node on the number of transmission layers for sending the downlink signal to the terminal device.

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