Wireless communication method, terminal device and transmitting node

Abstract

The embodiment of the present application provides a wireless communication method, a terminal device, and a transmitting node, which can realize the measurement and feedback of reference signals supporting multiple downlink channel transmissions. The method includes: the terminal device determines a mode for reporting the measurement results of multiple reference signals; according to the determined mode and the measurement results, the terminal device reports the reporting information including the rank indication corresponding to each reference signal in the multiple reference signals; wherein the reporting mode determined by the terminal device is a first mode or a second mode, in which the maximum value of the rank indication in the reporting information corresponding to each reference signal does not exceed a first predetermined value, and in the second mode, the maximum value of the sum of the values ​​of the rank indication in the reporting information corresponding to the multiple reference signals does not exceed a second predetermined value.

Description

Technical Field

[0001] The present application relates to the field of communications, and more specifically, to a wireless communication method, a terminal device, and a transmitting node. 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 determines a mode for reporting measurement results of multiple reference signals;

[0007] According to the determined mode and the measurement result, the terminal device reports reporting information including a rank indication corresponding to each reference signal in the multiple reference signals;

[0008] The reporting mode determined by the terminal device is the first mode or the second mode,

[0009] In the first mode, the maximum value of the rank indication in the reporting information corresponding to each reference signal does not exceed a first predetermined value,

[0010] In the second mode, a maximum value of a sum of values ​​of rank indicators in reporting information corresponding to the multiple reference signals does not exceed a second predetermined value.

[0011] 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, and the terminal device determines that the reporting mode of the reporting information is the first mode or the second mode, which can achieve the goal of limiting the number of transmission layers of the downlink channel to be sent to the terminal device by the network side on the terminal side.

[0012] 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 serving 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 first predetermined value is less than or equal to the value corresponding to the capability of the terminal device, and / or is less than or equal to the port quantity value corresponding to each reference signal configured for the terminal device.

[0014] In combination with the first aspect or any one of the above possible implementations, in another possible implementation of the first aspect, the second predetermined value is less than or equal to a value corresponding to the capability of the terminal device.

[0015] 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 a mode for reporting measurement results of multiple reference signals, including:

[0016] When the terminal device does not receive the configuration information for configuring the reporting mode of the measurement results of the multiple reference signals from the network device, the terminal device determines to adopt the first mode to report the measurement results of the multiple reference signals.

[0017] In combination with the first aspect or any one of the foregoing possible implementations, in another possible implementation of the first aspect, before the terminal device determines a mode for reporting measurement results of multiple reference signals, the method further includes:

[0018] The terminal device receives configuration information, where the configuration information is used to configure a reporting mode of measurement results of the multiple reference signals.

[0019] In combination with the first aspect or any one of the foregoing possible implementations, in another possible implementation of the first aspect, the configuration information is used to configure the terminal device to report measurement results of the multiple reference signals using the first mode.

[0020] In combination with the first aspect or any one of the foregoing possible implementations, in another possible implementation of the first aspect, the configuration information is used to configure the terminal device to report the measurement results of the multiple reference signals using the second mode.

[0021] In combination with the first aspect or any one of the foregoing possible implementations, in another possible implementation of the first aspect, the configuration information further carries the second predetermined value.

[0022] In combination with the first aspect or any one of the foregoing possible implementations, in another possible implementation of the first aspect, the configuration information further carries a maximum value of a rank indication in reporting information corresponding to each reference signal.

[0023] In combination with the first aspect or any one of the foregoing possible implementations, in another possible implementation of the first aspect, in the second mode, a maximum value of a rank indication in the reporting information corresponding to each reference signal is a third predetermined value.

[0024] In combination with the first aspect or any of the foregoing possible implementations, in another possible implementation of the first aspect, the third predetermined value is equal to the lower integer of a value obtained by dividing a value corresponding to the capability of the terminal device by the number of the multiple reference signals; or,

[0025] The third predetermined value is equal to the minimum value of the value corresponding to the capability of the terminal device and the port quantity value corresponding to the corresponding reference signal.

[0026] In combination with the first aspect or any one of the foregoing possible implementations, in another possible implementation of the first aspect, configurations of different reference signals in the configuration information are distinguished by indexes of the reference signals.

[0027] In combination with the first aspect or any one of the foregoing possible implementations, in another possible implementation of the first aspect, configurations of different reference signals in the configuration information are distinguished by indexes of corresponding reporting information of the reference signals.

[0028] 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 reports reporting information including a rank indication corresponding to each reference signal in the multiple reference signals, including:

[0029] The terminal device sends reporting information including a rank indication corresponding to the reference signal itself to the transmitting end of each reference signal respectively.

[0030] 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 reports reporting information including a rank indication corresponding to each reference signal in the multiple reference signals, including:

[0031] The terminal device sends 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 including a rank indication corresponding to the first reference signal;

[0032] 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.

[0033] In a second aspect, a wireless communication method is provided, including:

[0034] The first transmitting node receives reporting information sent by a terminal device, where the reporting information corresponds to a reference signal sent by the first transmitting node and includes a rank indication; wherein a plurality of transmitting nodes including the first transmitting node serve the terminal device;

[0035] According to the reported information, the first transmitting node determines the number of transmission layers for sending downlink signals to the terminal device.

[0036] Therefore, in an embodiment of the present application, multiple transmitting nodes serving a terminal device respectively receive reporting information sent by the terminal device, and the reporting information corresponds to the reference signal sent by the transmitting node itself and includes a rank indication. Therefore, each transmitting node can determine the downlink signal transmission layer according to the reporting information corresponding to the reference signal sent by the transmitting node itself, including the rank indication, thereby realizing the measurement and feedback of reference signals supporting transmission of multiple downlink channels.

[0037] In combination with the second aspect, in a possible implementation manner of the second aspect, the first transmitting node determining, according to the reported information, the number of transmission layers for sending a downlink signal to the terminal device, includes:

[0038] According to the value of the rank indication included in the reporting information, negotiate with other transmitting nodes of the terminal device on the number of transmission layers for the first transmitting node to send a downlink signal to the terminal device.

[0039] In combination with the second aspect or any of the foregoing possible implementations, in another possible implementation of the second aspect, the first transmitting node determining, according to the reported information, the number of layers of the transmission layer for sending a downlink signal to the terminal device, includes:

[0040] According to the value of the rank indication included in the reporting information and the preset number of transmission layers, the first transmitting node determines the number of transmission layers for sending a downlink signal to the terminal device.

[0041] The preset number of transmission layers is the number of transmission layers for sending downlink signals from the first transmitting node to the terminal device, which is pre-negotiated by the first transmitting node with other transmitting nodes of the terminal device.

[0042] In combination with the second aspect or any of the foregoing possible implementations, in another possible implementation of the second aspect, the first transmitting node determines, according to the value of the rank indication included in the reporting information, and the number of preset transmission layers, the number of transmission layers of the transmission layer for sending a downlink signal to the terminal device, including:

[0043] The smaller number of transmission layers corresponding to the value of the rank indication and the preset number of transmission layers is determined as the number of transmission layers for the first transmitting node to send a downlink signal to the terminal device.

[0044] In combination with the second aspect or any of the foregoing possible implementations, in another possible implementation of the second aspect, the method further includes:

[0045] The first transmitting node renegotiates with other transmitting nodes of the terminal device the number of transmission layers for sending downlink signals by the first transmitting node to the terminal device based on the reporting information sent multiple times by the terminal device, so as to update the preset number of transmission layers.

[0046] In combination with the second aspect or any one of the above possible implementations, in another possible implementation of the second aspect, the sum of the number of transmission layers of the downlink signal sent by the first transmitting node to the terminal device and the number of transmission layers of the downlink signal sent by other transmitting nodes to the terminal device is less than or equal to the value corresponding to the capability of 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. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] 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.

[0054] Figure 1 is a schematic diagram of a wireless communication system according to an embodiment of the present application.

[0055] Figure 2 is a schematic diagram of a wireless communication system according to an embodiment of the present application.

[0056] Figure 3 It is a schematic flowchart of a wireless communication method according to an embodiment of the present application.

[0057] Figure 4 It is a schematic flowchart of a wireless communication method according to an embodiment of the present application.

[0058] Figure 5 It is a schematic block diagram of a terminal device according to an embodiment of the present application.

[0059] Figure 6 It is a schematic block diagram of a transmitting node according to an embodiment of the present application.

[0060] Figure 7is a schematic block diagram of a system chip according to an embodiment of the present application.

[0061] Figure 8 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 and 2 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 transmission beams may come from the same transmitting node (for example, Figure 2 As shown, from the transmitting node 3) or from a different transmitting node (e.g., Figure 1 As shown, they come from transmitting nodes 1 and 2 respectively).

[0068] Optionally, Figure 1 and 2 The 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 and Figure 2 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 (Evolutional Node 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 generally used interchangeably herein. The term "and / or" herein is merely a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " herein generally indicates that the associated objects before and after are in an "or" relationship.

[0074] Figure 3 is a schematic flow chart of a wireless communication method 100 according to an embodiment of the present application. The method 100 may optionally be applied to Figure 1 The system shown is not limited thereto. The method 100 includes at least part of the following.

[0075] In 110, the terminal device determines a mode for reporting measurement results of multiple 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, according to the determined mode and the measurement result, the terminal device reports 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] Optionally, the terminal device may measure multiple reference signals at different times. Alternatively, the terminal device may report the reference signals at different times.

[0084] 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.

[0085] Optionally, the terminal device sends reporting information including a rank indication corresponding to the reference signal itself to a transmitter of each reference signal respectively.

[0086] Optionally, the terminal device sends a first message to the transmitter of at least one first reference signal among the multiple reference signals, and the first message includes 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.

[0087] 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.

[0088] 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.

[0089] 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.

[0090] 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.

[0091] Optionally, the reporting mode determined by the terminal device is the first mode or the second mode.

[0092] Optionally, in the first mode, a maximum value of the rank indication in the reporting information corresponding to each reference signal does not exceed a first predetermined value.

[0093] Optionally, the first predetermined value is less than or equal to a value corresponding to a capability of the terminal device, and / or less than or equal to a value of the number of ports corresponding to each reference signal configured for the terminal device.

[0094] Specifically, in the first mode, the maximum value of the rank indication in the reporting information corresponding to any reference signal of the terminal device does not exceed the first predetermined value, and the terminal device may not consider the sum of the values ​​of the rank indication in the reporting information corresponding to multiple reference signals. In this mode, after receiving the reporting information, the transmitting nodes of multiple reference signals can coordinate so that the total number of transmission layers of the downlink channel sent to the terminal device is less than the value corresponding to the capability of the terminal device.

[0095] Optionally, in the second mode, a maximum value of a sum of values ​​of rank indications in reporting information corresponding to the multiple reference signals does not exceed a second predetermined value.

[0096] Specifically, in the second mode, the terminal device can respectively determine the rank indication in the reporting information corresponding to each reference signal, so that the sum of the values ​​of the rank indication in the reporting information corresponding to multiple reference signals does not exceed a specific value, for example, does not exceed the value corresponding to the capability of the terminal device.

[0097] Optionally, the second predetermined value is less than or equal to a value corresponding to the capability of the terminal device.

[0098] In this mode, after receiving the reporting information, the transmitting nodes of multiple reference signals can directly determine the number of transmission layers sent to the terminal device according to the value of the rank indication reported by the terminal device.

[0099] In the second mode, 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 situation where the number of layers of data streams sent by multiple transmitting nodes to the terminal device exceeds the capability of the terminal device, thereby avoiding the waste of system resources due to the terminal device being unable to demodulate or discarding part of the data.

[0100] Optionally, in an embodiment of the present application, there are the following two methods to enable the terminal device to determine the reporting mode of the reported information.

[0101] In one manner, when the terminal device does not receive the configuration of the reporting mode from the network device, the default reporting mode may be used for reporting, for example, the first mode. If the configuration of the reporting mode is received, the reporting mode configured by the network device may be used for reporting, for example, the network device configures the second mode for reporting. In this manner, the network device may only configure the second mode. If it is determined that the terminal device needs to use the first mode for reporting, the network device may not make any configuration.

[0102] In another manner, there is no default reporting mode, the network device configures the reporting mode, and the terminal device reports using the reporting mode configured by the network device.

[0103] Optionally, in an embodiment of the present application, when the network device configures the second reporting mode, the configuration information also carries the first predetermined value.

[0104] Optionally, in an embodiment of the present application, when the network device configures the second reporting mode, the configuration information also carries the second predetermined value.

[0105] Optionally, in an embodiment of the present application, when the network device configures the second reporting mode, the configuration information further carries a maximum value of the rank indication in the reporting information corresponding to each reference signal.

[0106] Optionally, in the second mode, the maximum value of the rank indication in the reporting information corresponding to each reference signal is a third predetermined value.

[0107] Optionally, the third predetermined value is equal to the value obtained by dividing the value corresponding to the capability of the terminal device by the number of the multiple reference signals by the integer floor.

[0108] 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).

[0109] Optionally, the third predetermined value is equal to the minimum value of a value corresponding to the capability of the terminal device and a value of the number of ports corresponding to the corresponding reference signal.

[0110] Optionally, in the embodiment of the present application, configurations of different reference signals in the configuration information for configuring reporting information of the reference signal are distinguished by an index of the reference signal.

[0111] In this implementation, the 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 the downlink control information (Downlink Control Information, DCI) dedicated to the first configuration information.

[0112] 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.

[0113] Optionally, in the embodiment of the present application, configurations of different reference signals in the configuration information for configuring reporting information of the reference signal are distinguished by indexes of corresponding reporting information of the reference signal.

[0114] 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.

[0115] In order to more clearly understand the present application, the embodiments of the present application will be described below in combination with the first mode and the second mode respectively.

[0116] First Mode

[0117] The network side can send different NR-PDCCH and NR-PDSCH to the UE from 2 TRPs or 2 antenna panels or 2 beams. To support this transmission scheme, the network side will send different CSI-RS on different TRPs (respectively CSI-RS 1, CSI-RS 2, different CSI-RS are distinguished by different CSI-RS resource indicators), and configure the UE to measure these two signals (there will be corresponding CSI-RS resource setting configuration and reporting setting configuration).

[0118] The UE measures CSI-RS1 and CSI-RS2, and feeds back corresponding RIs respectively, and the maximum RI does not exceed the UE capability N.

[0119] After receiving the two RIs, the network side coordinates between the two TRPs or antenna panels or beams to ensure that the total number of transmission layers does not exceed the UE capability N.

[0120] The coordination between networks can be the coordination between TPRs in the same cell, or the coordination between TRPs in different cells (for example, through the X2 interface).

[0121] The interaction between the above coordination can also be divided into fast interaction and slow interaction (semi-static interaction). Fast interaction is suitable for coordination between TPRs in the same community, and slow interaction is suitable for coordination between TPRs in the same community and different campuses.

[0122] Among them, fast interaction means that when two TRPs transmit NR-PDSCH to one UE at the same time, the transmission layer (layer) transmitted by different TRPs can change quickly.

[0123] Slow interaction means that when two TRPs transmit NR-PDSCH to one UE at the same time, the number of layers transmitted by different TRPs changes slowly.

[0124] Second Mode

[0125] The network side can send different NR-PDCCH and NR-PDSCH to the UE from 2 TRPs or 2 antenna panels or 2 beams. To support this transmission scheme, the network side will send different CSI-RS on different TRPs (respectively CSI-RS 1 and CSI-RS 2, and different CSI-RS are distinguished by different CSI-RS resource indicators), and configure the UE to measure these two signals (there will be corresponding CSI-RS resource setting configuration and reporting setting configuration).

[0126] To avoid scheduling layers that exceed the UE's demodulation capability, the network side configuration can have the following optional methods:

[0127] Method 1: The network side configures the maximum feedback RI value (N1, N2) for CSI-RS 1 and CSI-RS 2 (that is, distinguished by the index of the reference signal), or configures the maximum feedback RI value (N1, N2) for two reporting (that is, distinguished by the index of the reported information), where N1+N2 does not exceed the capability of the UE.

[0128] Among them, the above N1 and N2 do not need to be explicitly configured, and the default corresponds to N / K (N is the maximum value of the UE capability, K is the number of PDCCH / PDSCHs received by the UE at the same time). N / K includes rounding up and rounding down. For example, N=5, K=2, then (N1, N2) can have different combinations, such as (2,2), (2,3,), (3,2).

[0129] If a CSI-RS or reporting information does not indicate anything, the maximum value of its rank indication may be a default value, ie <= min (UE maximum capability, number of CSI-RS ports).

[0130] Method 2: The network side configures the maximum feedback RI values ​​(N1, N2) configured for CSI-RS 1 and CSI-RS 2 respectively to not exceed the UE capability, or limits the maximum feedback RI values ​​(N1, N2) configured for two reporting to not exceed the UE capability, where N1+N2 does not exceed the UE capability

[0131] Method 3: TRP1 (master TRP) configures the UE to report multiple RIs in one reporting. For example, if the UE sends N1 and N2 to TRP2 (slave TRP) at the same time, TRP2 can automatically limit the layers it sends to ensure that the actual transmitted layer does not exceed N.

[0132] 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, and the terminal device determines that the reporting mode of the reporting information is the first mode or the second mode, which can achieve the goal of limiting the number of transmission layers of the downlink channel to be sent to the terminal device by the network side on the terminal side.

[0133] Figure 4 is a schematic flow chart of a wireless communication method 200 according to an embodiment of the present application. The method 200 may optionally be used for Figure 1 In the system shown in FIG. 2 , the method 200 includes at least part of the following contents.

[0134] In 210, a first transmitting node receives reporting information sent by a terminal device, where the reporting information corresponds to a reference signal sent by the first transmitting node and includes a rank indication, wherein a plurality of transmitting nodes including the first transmitting node serve the terminal device.

[0135] In 220, based on the reported information, the first transmitting node determines the number of transmission layers for sending downlink signals to the terminal device.

[0136] Optionally, based on the value of the rank indication included in the reporting information, the first transmitting node negotiates with other transmitting nodes of the terminal device on the number of transmission layers for the first transmitting node to send a downlink signal to the terminal device.

[0137] In this embodiment, the first transmitting node negotiates with other multiple transmitting nodes the number of transmission layers of the downlink signal sent by the first transmitting node to the terminal device, which can avoid the number of transmission layers of the downlink channel sent by multiple transmitting nodes to the terminal device exceeding the value corresponding to the capability of the terminal device.

[0138] Optionally, based on the value of the rank indication included in the reporting information and the preset number of transmission layers, the first transmitting node determines the number of transmission layers for sending a downlink signal to the terminal device.

[0139] The preset number of transmission layers is the number of transmission layers for the first transmitting node to send a downlink signal to the terminal device, which is pre-negotiated by the first transmitting node with other transmitting nodes of the terminal device.

[0140] In this embodiment, the first transmitting node pre-negotiates with other multiple transmitting nodes the number of transmission layers of the downlink signal sent by the first transmitting node to the terminal device, which can prevent the number of transmission layers of the downlink channel sent by multiple transmitting nodes to the terminal device from exceeding the value corresponding to the capability of the terminal device. In addition, pre-negotiating the number of transmission layers can avoid the delay caused by the multiple transmitting nodes negotiating the number of transmission layers after receiving the reported information reported by the terminal device.

[0141] Optionally, the smaller number of transmission layers corresponding to the value of the rank indication and a preset number of transmission layers is determined as the number of transmission layers for the first transmitting node to send a downlink signal to the terminal device.

[0142] Optionally, the first transmitting node renegotiates with other transmitting nodes of the terminal device the number of transmission layers for sending downlink signals by the first transmitting node to the terminal device based on the reporting information sent multiple times by the terminal device, so as to update the preset number of transmission layers.

[0143] Specifically, since the number of transmission layers pre-negotiated by multiple transmitting nodes may not meet the needs of the terminal device, the multiple transmitting nodes can re-negotiate the number of transmission layers for each transmitting node to send downlink signals to the terminal device based on the value of the rank indication in the reporting information reported multiple times by the terminal device, and update the preset number of transmission layers.

[0144] For example, TRP1 and TRP2 pre-negotiate that the transmission layer numbers of the downlink signals sent by TRP1 and TRP2 to the terminal device are 2 and 2 respectively, but the rank indication values ​​of the reporting information reported multiple times by the terminal device are 1 and 3 for TRP1 and TRP2 respectively, then TRP1 and TRP2 can re-negotiate that the transmission layer numbers of the downlink signals sent to the terminal device are 1 and 3 respectively, thereby better meeting the needs of the terminal device.

[0145] Optionally, the sum of the number of transmission layers of downlink signals sent by the first transmitting node to the terminal device and the number of transmission layers of downlink signals sent by other transmitting nodes to the terminal device is less than or equal to a value corresponding to the capability of the terminal device.

[0146] For example, a UE is capable of supporting demodulation of up to 4 layers. If two TRPs send 2 and 4 layers respectively, the UE's capability is exceeded and the UE will be unable to demodulate or discard some data, wasting system resources. Therefore, the transport layers sent by multiple transmitting nodes should not exceed the value corresponding to the terminal's capability.

[0147] Therefore, in an embodiment of the present application, multiple transmitting nodes serving a terminal device respectively receive reporting information sent by the terminal device, and the reporting information corresponds to the reference signal sent by the transmitting node itself and includes a rank indication. Therefore, each transmitting node can determine the downlink signal transmission layer according to the reporting information corresponding to the reference signal sent by the transmitting node itself, including the rank indication, thereby realizing the measurement and feedback of reference signals supporting transmission of multiple downlink channels.

[0148] Figure 5 is a schematic block diagram of a terminal device 300 according to an embodiment of the present application. Figure 5 As shown, the terminal device 300 includes a processing unit 310 and a communication unit 320; wherein,

[0149] The processing unit 310 is used to: determine a mode for reporting measurement results of multiple reference signals;

[0150] The communication unit 320 is configured to: report reporting information including a rank indication corresponding to each reference signal in the multiple reference signals according to the determined mode and the measurement result;

[0151] The reporting mode determined by the processing unit is the first mode or the second mode,

[0152] In the first mode, the maximum value of the rank indication in the reporting information corresponding to each reference signal does not exceed a first predetermined value,

[0153] In the second mode, a maximum value of a sum of values ​​of rank indicators in reporting information corresponding to the multiple reference signals does not exceed a second predetermined value.

[0154] 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.

[0155] Figure 6 4 is a schematic block diagram of a transmitting node 400 according to an embodiment of the present application. The transmitting node 400 includes a communication unit 410 and a processing unit 420.

[0156] The communication unit 410 is used to: receive reporting information sent by a terminal device, where the reporting information corresponds to a reference signal sent by the transmitting node and includes a rank indication;

[0157] The processing unit 420 is used to determine the number of transmission layers for sending downlink signals to the terminal device according to the reported information.

[0158] 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.

[0159] Figure 7 It is a schematic structural diagram of the system chip 500 according to an embodiment of the present application. Figure 7 The system chip 500 includes an input interface 501 , an output interface 502 , a processor 503 and a memory 504 , which may be connected via an internal communication connection line. The processor 503 is used to execute the code in the memory 504 .

[0160] 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.

[0161] 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.

[0162] Figure 8 is a schematic block diagram of a communication device 600 according to an embodiment of the present application. Figure 8 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.

[0163] Alternatively, if Figure 8As shown, the communication device 600 may include a transceiver 630, and the processor 610 may control the transceiver 630 to communicate externally.

[0164] 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.

[0165] 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.

[0166] 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.

[0167] 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.

[0168] 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.

[0169] 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.

[0170] 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.

[0171] 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.

[0172] 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.

[0173] 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.

[0174] 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, characterized in that: include: The terminal device receives configuration information, where the configuration information is used to configure the terminal device to report measurement results of multiple reference signals in a first mode, and the configuration information is carried in a trigger signal that triggers the terminal device to measure the multiple reference signals; The terminal device determines, based on the configuration information, to report the measurement results of the multiple reference signals in the first mode; According to the determined first mode and the measurement result, the terminal device sends reporting information including a rank indication corresponding to each reference signal in the multiple reference signals respectively to the transmitting node of the reference signal itself, wherein, in the first mode, the maximum value of the rank indication in the reporting information corresponding to each reference signal does not exceed a first predetermined value, and the first predetermined value is less than or equal to the value corresponding to the capability of the terminal device and the port quantity value corresponding to each reference signal configured for the terminal device, wherein, in the first mode, after receiving the reporting information, the transmitting node of each reference signal increases the number of transmission layers corresponding to the value of the rank indication. and a smaller number of layers among the preset number of transmission layers, which is determined as the number of transmission layers for the transmitting node to send a downlink signal to the terminal device, wherein the preset number of transmission layers is the number of transmission layers for the transmitting node to send a downlink signal to the terminal device that is negotiated in advance with other transmitting nodes of the terminal device, wherein when the preset number of transmission layers does not meet the needs of the terminal device, the transmitting node of each reference signal re-coordinates the number of transmission layers for each transmitting node to send a downlink signal to the terminal device according to the value of the rank indication in the reporting information reported by the terminal device for multiple times, and updates the preset number of transmission layers.

2. The method according to claim 1, characterized in that The multiple reference signals come from multiple transmitting nodes serving the terminal device.

3. The method according to any one of claims 1 to 2, characterized in that The method further comprises: When the terminal device does not receive the configuration information for configuring the reporting mode of the measurement results of the multiple reference signals from the network device, the terminal device determines to adopt the first mode to report the measurement results of the multiple reference signals.

4. The method according to claim 1, characterized in that: Configurations of different reference signals in the configuration information are distinguished by indexes of the reference signals.

5. The method according to claim 1, characterized in that: Configurations of different reference signals in the configuration information are distinguished by indexes of corresponding reporting information of the reference signals.

6. The method according to claim 1, characterized in that The terminal device reports reporting information including a rank indication corresponding to each reference signal in the multiple reference signals, including: The terminal device sends 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 including a rank indication corresponding to the first reference signal; 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. A wireless communication method, characterized in that: include: The first transmitting node receives reporting information sent by a terminal device, where the reporting information corresponds to a reference signal sent by the first transmitting node and includes a rank indication; wherein a plurality of transmitting nodes including the first transmitting node serve the terminal device; Determine the smaller number of the number of transmission layers corresponding to the value of the rank indication and the number of preset transmission layers as the number of transmission layers for the first transmitting node to send a downlink signal to the terminal device, wherein the preset number of transmission layers is the number of transmission layers for the first transmitting node to send a downlink signal to the terminal device that is negotiated in advance between the first transmitting node and other transmitting nodes of the terminal device; When the preset number of transmission layers does not meet the needs of the terminal device, the first transmitting node renegotiates with other transmitting nodes of the terminal device on the number of transmission layers for sending downlink signals by the first transmitting node to the terminal device based on the reporting information sent multiple times by the terminal device, so as to update the preset number of transmission layers.

8. The method according to claim 7, characterized in that The sum of the number of transmission layers used by the first transmitting node to send downlink signals to the terminal device and the number of transmission layers used by other transmitting nodes to send downlink signals to the terminal device is less than or equal to a value corresponding to the capability of the terminal device.

9. A terminal device, characterized in that: It includes a processing unit and a communication unit; wherein, The communication unit is used to: receive configuration information, where the configuration information is used to configure the terminal device to report measurement results of multiple reference signals in a first mode, and the configuration information is carried in a trigger signal that triggers the terminal device to measure the multiple reference signals; The processing unit is configured to: determine, based on the configuration information, a mode for reporting the measurement results of the multiple reference signals using the first mode; The communication unit is also used to: send reporting information including a rank indication corresponding to each reference signal in the multiple reference signals respectively according to the determined first mode and the measurement result, wherein, in the first mode, the maximum value of the rank indication in the reporting information corresponding to each reference signal does not exceed a first predetermined value, and the first predetermined value is less than or equal to the value corresponding to the capability of the terminal device and the port quantity value corresponding to each reference signal configured for the terminal device, wherein, in the first mode, after receiving the reporting information, the transmitting node of each reference signal transmits the transmission value corresponding to the value of the rank indication. The smaller number of layers and the preset number of layers of the transmission layer is determined as the number of layers of the transmission layer for the transmitting node to send the downlink signal to the terminal device, wherein the preset number of layers of the transmission layer is the number of layers of the transmission layer for the transmitting node to send the downlink signal to the terminal device negotiated in advance with other transmitting nodes of the terminal device, wherein, when the preset number of layers of the transmission layer does not meet the needs of the terminal device, the transmitting node of each reference signal re-coordinates the number of layers of the transmission layer for each transmitting node to send the downlink signal to the terminal device according to the value of the rank indication in the reporting information reported by the terminal device for multiple times, and updates the preset number of layers of the transmission layer.

10. The terminal device according to claim 9, characterized in that: The multiple reference signals come from multiple transmitting nodes serving the terminal device.

11. The terminal device according to any one of claims 9 to 10, characterized in that: The processing unit is further configured to: When the communication unit does not receive the configuration information for configuring the reporting mode of the measurement results of the multiple reference signals by the network device, it is determined to adopt the first mode to report the measurement results of the multiple reference signals.

12. The terminal device according to claim 9, characterized in that: Configurations of different reference signals in the configuration information are distinguished by indexes of the reference signals.

13. The terminal device according to claim 9, characterized in that: Configurations of different reference signals in the configuration information are distinguished by indexes of corresponding reporting information of the reference signals.

14. The terminal device according to claim 9, 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.

15. A transmitting node, characterized in that: including a communication unit and a processing unit; The communication unit is used to: receive reporting information sent by a terminal device, where the reporting information corresponds to a reference signal sent by the transmitting node and includes a rank indication; wherein a plurality of transmitting nodes including the transmitting node serve the terminal device; The processing unit is used to: determine the number of transmission layers for sending downlink signals to the terminal device according to the reported information; Wherein, the processing unit is further used for: Determine the smaller number of the number of transmission layers corresponding to the value of the rank indication and the number of preset transmission layers as the number of transmission layers for the transmitting node to send a downlink signal to the terminal device, wherein the preset number of transmission layers is the number of transmission layers for the transmitting node to send a downlink signal to the terminal device that is negotiated in advance between the transmitting node and other transmitting nodes of the terminal device; When the preset number of transmission layers does not meet the needs of the terminal device, the number of transmission layers for the transmitting node to send downlink signals to the terminal device is renegotiated with other transmitting nodes of the terminal device based on the reporting information sent multiple times by the terminal device to update the preset number of transmission layers.

16. The transmitting node according to claim 15, characterized in that: The sum of the number of transmission layers used by the transmitting node to send downlink signals to the terminal device and the number of transmission layers used by other transmitting nodes to send downlink signals to the terminal device is less than or equal to a value corresponding to the capability of the terminal device.

17. A system chip, comprising an input interface, an output interface, a processor and a memory, wherein the input interface, the output interface, the processor and the memory are connected via an internal communication connection line; The memory is used to store a computer program that can be run on the processor; The processor is used to execute the computer program to control the input interface to receive signals and control the output interface to send signals, so as to execute the method according to any one of claims 1 to 6.

18. A communication device comprising a processor, a memory and a transceiver, wherein: The transceiver, the processor and the memory are connected via a bus system; The memory is used to store a computer program that can be run on the processor; The processor is used to execute the computer program to control the transceiver to receive signals and send signals to perform the method according to any one of claims 7 to 8.

19. A computer storage medium storing a computer readable program, wherein the computer readable program, when executed by at least one processor, implements the method of any one of claims 1 to 6 or any one of claims 7 to 8.

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