Csi-rs configuration method, csi feedback method, apparatus, and device

Abstract

The application discloses a CSI-RS configuration method, a CSI feedback method, a device and equipment, and belongs to the technical field of communication. The CSI-RS configuration method comprises the following steps: a terminal receives channel state information reference signal (CSI-RS) configuration information; wherein the CSI-RS configuration information is used for indicating the association relationship between a CSI-RS port and multiple groups of quasi co-location (QCL) reference sources.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of communication, and particularly relates to a CSI-RS configuration method, a CSI feedback method, a device and equipment. BACKGROUND

[0002] The existing multi-transmission and reception point (TRP) transmission is a non-coherent joint transmission mode (NCJT), and in the related art, the channel state information-reference signal (CSI-RS) configuration and the channel state information (CSI) feedback of the multi-TRP are enhanced.

[0003] In the related art, the CSI-RS resources are divided into multiple channel measurement resource (CMR) subsets or CSI-RS resource subsets, and a user equipment (UE) can measure at least one pair of CMRs to calculate the CSI of the NCJT according to the configuration, wherein the pair of CMRs are respectively from different CMR subsets. When the CSI is fed back, the UE can report one CSI of the NCJT and X = 0, 1, 2 CSIs of single TRPs according to the configuration, or report the optimal CSI of the NCJT and the single TRP. Since the above-mentioned enhanced information does not contain the relationship between multiple TRPs, it cannot be applied to coherent joint transmission (CJT). SUMMARY

[0004] Embodiments of the present application provide a CSI-RS configuration method, a CSI feedback method, a device and equipment, which can solve the problems of CSI-RS configuration and CSI feedback in the multi-TRP coherent joint transmission mode.

[0005] In a first aspect, a CSI-RS configuration method is provided, and the method comprises:

[0006] The terminal receives channel state information-reference signal (CSI-RS) configuration information.

[0007] The CSI-RS configuration information is used to indicate the association relationship between the CSI-RS port and multiple groups of quasi co-location (QCL) reference sources.

[0008] In a second aspect, a CSI-RS configuration method is provided, and the method comprises:

[0009] The network-side device sends channel state information reference signal (CSI-RS) configuration information to a terminal;

[0010] The CSI-RS configuration information is used to indicate an association relationship between a CSI-RS port and multiple groups of quasi co-location (QCL) reference sources.

[0011] In a third aspect, a CSI feedback method is provided, and the method comprises:

[0012] The terminal receives channel state information reference signal (CSI-RS) configuration information and channel state information (CSI) report configuration information;

[0013] The terminal performs measurement according to the CSI-RS configuration information, selects at least one channel measurement resource (CMR) group from multiple CMR subsets, and obtains CSI.

[0014] The terminal feeds back the CSI to the network-side device according to the CSI report configuration information.

[0015] In a fourth aspect, a CSI feedback method is provided, and the method comprises:

[0016] The network-side device sends channel state information reference signal (CSI-RS) configuration information and channel state information (CSI) report configuration information to a terminal;

[0017] The network-side device receives channel state information (CSI) fed back by the terminal.

[0018] In a fifth aspect, a CSI-RS configuration device is provided, and the device comprises:

[0019] A first receiving unit is configured to receive channel state information reference signal (CSI-RS) configuration information;

[0020] The CSI-RS configuration information is used to indicate an association relationship between a CSI-RS port and multiple groups of quasi co-location (QCL) reference sources.

[0021] In a sixth aspect, a CSI-RS configuration device is provided, and the device comprises:

[0022] A first sending unit is configured to send channel state information reference signal (CSI-RS) configuration information to a terminal;

[0023] The CSI-RS configuration information is used to indicate an association relationship between a CSI-RS port and multiple groups of quasi co-location (QCL) reference sources.

[0024] In a seventh aspect, a CSI feedback device is provided, and the device comprises:

[0025] a second receiving unit, configured to receive channel state information reference signal (CSI-RS) configuration information and channel state information (CSI) reporting configuration information;

[0026] a measuring unit, configured to perform measurement according to the CSI-RS configuration information, select at least one group of CMRs from a plurality of CMR subsets, and obtain CSI;

[0027] a feedback unit, configured to feed back the CSI to a network side device according to the CSI reporting configuration information.

[0028] In an eighth aspect, a CSI feedback apparatus is provided, comprising:

[0029] a second sending unit, configured to send channel state information reference signal (CSI-RS) configuration information and channel state information (CSI) reporting configuration information to a terminal;

[0030] a third receiving unit, configured to receive channel state information (CSI) fed back by the terminal.

[0031] In a ninth aspect, a terminal is provided, comprising a processor, a memory, and a program or instruction stored in the memory and executable on the processor, which, when executed by the processor, implements the steps of the CSI-RS configuration method according to the first aspect, or implements the steps of the CSI feedback method according to the third aspect.

[0032] In a tenth aspect, a terminal is provided, comprising a processor and a communication interface, wherein the communication interface is configured to receive channel state information reference signal (CSI-RS) configuration information, wherein the CSI-RS configuration information is used to indicate an association relationship between a CSI-RS port and a plurality of quasi co-location (QCL) reference sources. Alternatively, the communication interface is configured to receive channel state information reference signal (CSI-RS) configuration information and channel state information (CSI) reporting configuration information, and the processor is configured to perform measurement according to the CSI-RS configuration information, select at least one group of CMRs from a plurality of CMR subsets, and obtain CSI, and the communication interface is further configured to feed back the CSI to a network side device according to the CSI reporting configuration information.

[0033] In an eleventh aspect, a network side device is provided, comprising a processor, a memory, and a program or instruction stored in the memory and executable on the processor, which, when executed by the processor, implements the steps of the CSI-RS configuration method according to the second aspect, or implements the steps of the CSI feedback method according to the fourth aspect.

[0034] In a twelfth aspect, a network-side device is provided, including a processor and a communication interface, wherein the communication interface is configured to send channel state information reference signal (CSI-RS) configuration information to a terminal; and the CSI-RS configuration information is used to indicate the association between a CSI-RS port and multiple groups of quasi co-location (QCL) reference sources. Alternatively, the communication interface is configured to send CSI-RS configuration information and channel state information (CSI) reporting configuration information to the terminal; and the communication interface is further configured to receive CSI fed back by the terminal.

[0035] In a thirteenth aspect, a readable storage medium is provided, in which a program or instruction is stored, and the program or instruction is executed by a processor to implement the steps of the CSI-RS configuration method according to the first aspect, or to implement the steps of the CSI-RS configuration method according to the second aspect, or to implement the steps of the CSI feedback method according to the third aspect, or to implement the steps of the CSI feedback method according to the fourth aspect.

[0036] In a fourteenth aspect, a chip is provided, including a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is configured to run a program or instruction to implement the CSI-RS configuration method according to the first aspect, or to implement the CSI-RS configuration method according to the second aspect, or to implement the CSI feedback method according to the third aspect, or to implement the CSI feedback method according to the fourth aspect.

[0037] In a fifteenth aspect, a computer program / program product is provided, which is stored in a non-transitory storage medium, and the program / program product is executed by at least one processor to implement the steps of the CSI-RS configuration method according to the first aspect, or to implement the steps of the CSI-RS configuration method according to the second aspect, or to implement the steps of the CSI feedback method according to the third aspect, or to implement the steps of the CSI feedback method according to the fourth aspect.

[0038] In the embodiments of the present application, the terminal receives the CSI-RS configuration information sent by the network-side device, which is used to indicate the association between the CSI-RS port and the multiple groups of QCL, thereby realizing the association between the channel measurement between multiple TRPs and the terminal, and being applicable to the coherent joint transmission scenario of multiple TRPs. BRIEF DESCRIPTION OF DRAWINGS

[0039] Figure 1 A structure diagram of a wireless communication system to which the embodiments of the present application are applicable;

[0040] Figure 2 A flowchart of the CSI-RS configuration method provided by the embodiments of the present application;

[0041] Figure 3 Flowchart II of the CSI-RS configuration method provided by the embodiment of the present application;

[0042] Figure 4 Flowchart I of the CSI feedback method provided by the embodiment of the present application;

[0043] Figure 5 Flowchart II of the CSI feedback method provided by the embodiment of the present application;

[0044] Figure 6 Structure diagram I of the CSI-RS configuration device provided by the embodiment of the present application;

[0045] Figure 7 Structure diagram II of the CSI-RS configuration device provided by the embodiment of the present application;

[0046] Figure 8 Structure diagram I of the CSI feedback device provided by the embodiment of the present application;

[0047] Figure 9 Structure diagram II of the CSI feedback device provided by the embodiment of the present application;

[0048] Figure 10 Structure diagram of the communication device provided by the embodiment of the present application;

[0049] Figure 11 Hardware structure diagram of a terminal for implementing the embodiment of the present application;

[0050] Figure 12 Structure diagram of the network side device provided by the embodiment of the present application. DETAILED DESCRIPTION

[0051] The technical solutions in the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all of them. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art belong to the scope of protection of the present application.

[0052] The terms "first", "second", and the like in the description and in the claims of the present application are used for distinguishing between similar objects and are not necessarily used to describe a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the present application encompasses any of the possible sequences or arrangements of steps. It is also to be understood that the terminology "and / or" as used herein refers to and encompasses any possible combinations of one or more of the associated listed items, and that the terminology "at least one of" is used to describecombinations of one or more of the associated listed items, and that the terminology "one or more of" is used to describe combinations of one or more of the associated listed items.

[0053] It is worth noting that the techniques described in the embodiments of the present application are not limited to Long Term Evolution (LTE) / LTE-Advanced (LTE-A) systems, and can be applicable to other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency-Division Multiple Access (SC-FDMA), and other systems. The terms "system" and "network" are often used interchangeably in the embodiments of the present application, and the described techniques can be applied to the above-mentioned systems and radio technologies, as well as other systems and radio technologies. The following description describes a New Radio (NR) system for the purpose of example, and NR terminology is used in most of the following description, but these techniques can also be applied to applications other than NR system applications, such as 6th Generation (6G) communication systems. th

[0054] Figure 1 ​A structure diagram of a wireless communication system to which embodiments of the present application can be applied is shown. The wireless communication system includes a terminal 11 and a network side device 12. The terminal 11 can also be referred to as a terminal device or a user terminal (User Equipment, UE). The terminal 11 can be a terminal side device such as a mobile phone, a tablet personal computer (Tablet Personal Computer), a laptop computer (Laptop Computer), a personal digital assistant (Personal Digital Assistant, PDA), a palm computer, a netbook, an ultra-mobile personal computer (ultra-mobile personal computer, UMPC), a mobile Internet device (Mobile Internet Device, MID), a wearable device, or a vehicle-mounted device (VUE), a pedestrian terminal (PUE), etc. The wearable device includes a smart watch, a bracelet, a headset, glasses, etc. It should be noted that the specific type of the terminal 11 is not limited in the embodiments of the present application. The network side device 12 can be a base station or a core network. The base station can be referred to as a node B, an evolved node B, an access point, a base transceiver station (Base Transceiver Station, BTS), a radio base station, a radio transceiver, a basic service set (Basic Service Set, BSS), an extended service set (Extended Service Set, ESS), a node B, an evolved node B (eNB), a home node B, a home evolved node B, a WLAN access point, a WiFi node, a transmitting receiving point (Transmitting Receiving Point, TRP), or some other appropriate term in the art, as long as the same technical effect is achieved. The base station is not limited to a specific technical term, and it should be noted that only a base station in an NR system is taken as an example in the embodiments of the present application, but the specific type of the base station is not limited.

[0055] The CSI-RS configuration method, the CSI feedback method, the device and the apparatus provided by the embodiments of the present application will be described in detail below in combination with the accompanying drawings and some embodiments and application scenarios.

[0056] Figure 2 One of the flowcharts of the CSI-RS configuration method provided by the embodiments of the present application is shown. As shown in the figure, the method includes the following steps: Figure 2

[0057] Step 200, the terminal receives channel state information reference signal (CSI-RS) configuration information.

[0058] ​The CSI-RS configuration information is used for indicating an association relationship of a CSI-RS port and multiple groups of quasi co-location (QCL) reference sources.

[0059] The quasi co-location (QCL) refers to that average delay, delay spread, Doppler frequency offset, Doppler spread, and spatial reception parameters of a symbol on an antenna port can be inferred from another antenna port. Four different types of QCL relationships are designed in new radio (NR) to cope with different transmission scenarios.

[0060] 1) QCL-TypeA, {Doppler frequency offset, Doppler spread, average delay, delay spread};

[0061] 2) QCL-TypeB, {Doppler frequency offset, Doppler spread};

[0062] 3) QCL-TypeC, {Doppler frequency offset, average delay};

[0063] 4) QCL-TypeD, {spatial reception parameter}.

[0064] In the embodiment of the application, the CSI-RS configuration information indicates an association relationship of a CSI-RS port and multiple groups of QCL reference sources, that is, average delay, delay spread, Doppler frequency offset, Doppler spread, and spatial reception parameters of a symbol on the CSI-RS port can be inferred from antenna ports of the multiple groups of QCL reference sources, thereby realizing association of channel measurement between multiple TRPs and a terminal.

[0065] Optionally, the CSI-RS configuration information includes at least one CSI-RS resource, and one CSI-RS resource includes at least one CSI-RS port.

[0066] Optionally, each CSI-RS port is associated with multiple first transmission configuration indicator (TCI) states or multiple groups of QCL reference sources, one first TCI state corresponds to one group of QCL reference sources, and multiple first TCI states correspond to multiple groups of QCL reference sources.

[0067] The TCI state is used for indicating a QCL reference relationship between reference signals.

[0068] Optionally, each of the CSI-RS ports is associated with a second TCI state, wherein the second TCI state corresponds to multiple sets of QCL reference sources. That is, one second TCI state corresponds to multiple sets of QCL reference sources, so that each of the CSI-RS ports is associated with multiple sets of QCL reference sources.

[0069] Optionally, the CSI-RS resource further satisfies at least one of the following:

[0070] Each of the sets of QCL reference sources includes at least one QCL reference source.

[0071] In the case where each of the CSI-RS ports is associated with multiple sets of QCL reference sources, the multiple sets of QCL reference sources have the same number and type of QCL reference sources.

[0072] In the case where each of the CSI-RS ports is associated with multiple sets of QCL reference sources, the multiple sets of QCL reference sources have different numbers and / or types of QCL reference sources.

[0073] In the case where each of the sets of QCL reference sources includes two QCL reference sources, one of the two QCL reference sources is of the type QCL-TypeD.

[0074] A channel state information interference measurement (CSI-IM) resource corresponding to the CSI-RS resource has the same QCL assumption as the CSI-RS resource.

[0075] In one implementation, in the case where each of the CSI-RS ports is associated with multiple sets of QCL reference sources, the multiple sets of QCL reference sources have the same number and type of QCL reference sources. For example, a network-side device configures a terminal with one CSI-RS port associated with a first set of QCL reference sources, a second set of QCL reference sources, and a third set of QCL reference sources. The first set of QCL reference sources includes two QCL reference sources of the types QCL-TypeA and QCL-TypeD, respectively. Then, the second set of QCL reference sources also includes two QCL reference sources of the types QCL-TypeA and QCL-TypeD, respectively, and the third set of QCL reference sources also includes two QCL reference sources of the types QCL-TypeA and QCL-TypeD, respectively. That is, the first, second, and third sets of QCL reference sources have the same number and type of QCL reference sources.

[0076] In an implementation, in the case that each of the CSI-RS ports is associated with multiple groups of QCL reference sources, the number and / or type of QCL reference sources included in each of the multiple groups of QCL reference sources are different. For example, the network-side device configures a terminal with one CSI-RS port associated with a first group of QCL reference sources and a second group of QCL reference sources, the first group of QCL reference sources includes two QCL reference sources of QCL-TypeA and QCL-TypeD, and the second group of QCL reference sources includes one QCL reference source of QCL-TypeD, or the second group of QCL reference sources includes two QCL reference sources of QCL-TypeC and QCL-TypeD.

[0077] In an implementation, in the case that each of the groups of QCL reference sources includes two QCL reference sources, the type of one of the two QCL reference sources is QCL-TypeD.

[0078] Optionally, the CSI-RS resource includes a CSI-RS resource for channel measurement and a CSI-RS resource for interference measurement.

[0079] Optionally, the CSI-RS configuration information is used for coherent joint transmission (CJT), and the channel state information (CSI) feedback based on the CSI-RS configuration information is non-precoding matrix indication (non-PMI) based CSI feedback.

[0080] It can be understood that in the scenario of configuring the non-PMI-based CSI feedback and the coherent joint transmission mode, the network side device obtains the CSI of the terminal to multiple TRPs through the uplink sounding reference signal (SRS) sent by the terminal, and if there is uplink and downlink channel reciprocity, the network side device can calculate the precoding matrix suitable for the multiple TRPs of the terminal according to the CSI of the terminal to multiple TRPs. The CSI-RS sent by the network side device is precoded, and the terminal can measure the equivalent channel from the multiple TRPs to the terminal after precoding, estimate the corresponding other CSI information, and feed back to the network side device through the CSI report. The other CSI information includes, for example, the selection port indication, the rank indication (RI), the channel quality indication (CQI), and the like. The network side device sends the CSI-RS configuration information to the terminal, the CSI-RS configuration information indicates the association relationship between the CSI-RS port and the multiple groups of QCL reference sources, contains the relationship of the channel measurement between the multiple TRPs and the terminal, and is suitable for the coherent joint transmission.

[0081] The CSI feedback method based on the non-PMI can be consistent with the prior art. For example, when the CSI feedback quantity reportQauntity is configured as “cri-RI-CQI”, the UE feeds back the RI and the CQI, and can determine the CSI-RS port for channel measurement corresponding to the RI according to the port indication (non-PMI-PortIndication) or the default port order.

[0082] The CSI-RS configuration method provided by the embodiment of the application realizes the association of the channel measurement between the multiple TRPs and the terminal by receiving the CSI-RS configuration information sent by the network side device and indicating the association relationship between the CSI-RS port and the multiple groups of QCL reference sources, and can be applied to the coherent joint transmission scenario of the multiple TRPs.

[0083] Figure 3 The flowchart of the CSI-RS configuration method provided by the embodiment of the application is shown in FIG. 2. As shown in FIG. 2, the method comprises the following steps: Figure 3

[0084] Step 300, the network side device sends channel state information reference signal (CSI-RS) configuration information to the terminal.

[0085] The CSI-RS configuration information is used to indicate the association relationship between the CSI-RS port and the multiple groups of quasi co-location (QCL) reference sources.

[0086] ​Optionally, the CSI-RS configuration information comprises at least one CSI-RS resource, wherein one CSI-RS resource comprises at least one CSI-RS port.

[0087] Optionally, each of the CSI-RS ports is associated with a plurality of first transmission configuration indication, TCI, states or a plurality of groups of QCL reference sources, one of the first transmission configuration indication, TCI, states corresponding to one of the groups of QCL reference sources.

[0088] Optionally, each of the CSI-RS ports is associated with one second TCI state, wherein the second TCI state corresponds to a plurality of groups of QCL reference sources.

[0089] Optionally, the CSI-RS resource further satisfies at least one of the following:

[0090] Each of the groups of QCL reference sources comprises at least one QCL reference source.

[0091] In the case that each of the CSI-RS ports is associated with a plurality of groups of QCL reference sources, each of the groups of QCL reference sources comprises the same number and type of QCL reference sources.

[0092] In the case that each of the CSI-RS ports is associated with a plurality of groups of QCL reference sources, each of the groups of QCL reference sources comprises different number and / or type of QCL reference sources.

[0093] In the case that each of the groups of QCL reference sources comprises two QCL reference sources, one of the two QCL reference sources is of QCL-TypeD.

[0094] A channel state information interference measurement, CSI-IM, resource corresponding to the CSI-RS resource has the same QCL assumption as the CSI-RS resource.

[0095] Optionally, a channel state information interference measurement, CSI-IM, resource corresponding to the CSI-RS resource has the same QCL association as the CSI-RS resource.

[0096] Optionally, the CSI-RS resource comprises a CSI-RS resource for channel measurement and a CSI-RS resource for interference measurement.

[0097] Optionally, the CSI-RS configuration information is used for coherent joint transmission, and channel state information, CSI, feedback based on the CSI-RS configuration information is non-precoding matrix indication, non-PMI, based CSI feedback.

[0098] It should be noted that the CSI-RS configuration method provided by the embodiments of the present application takes the network side device as the execution subject, and belongs to the same inventive concept as the CSI-RS configuration method taking the terminal as the execution subject shown in the above embodiments, and therefore, for the understanding of the CSI-RS configuration method taking the network side device as the execution subject in the embodiments of the present application, reference can be made to the description in the foregoing CSI-RS configuration method embodiments taking the terminal as the execution subject, which will not be repeated here. Figure 2 It should be noted that the CSI-RS configuration method provided by the embodiments of the present application takes the network side device as the execution subject, and belongs to the same inventive concept as the CSI-RS configuration method taking the terminal as the execution subject shown in the above embodiments, and therefore, for the understanding of the CSI-RS configuration method taking the network side device as the execution subject in the embodiments of the present application, reference can be made to the description in the foregoing CSI-RS configuration method embodiments taking the terminal as the execution subject, which will not be repeated here.

[0099] The CSI-RS configuration method provided by the embodiments of the present application is that the network side device sends the CSI-RS configuration information for indicating the association relationship between the CSI-RS port and the multiple groups of QCL reference sources to the terminal, and realizes the association of the channel measurement between the multiple TRPs and the terminal, which can be applicable to the coherent joint transmission scenario of the multiple TRPs.

[0100] Figure 4 One of the flowcharts of the CSI feedback method provided by the embodiments of the present application is shown in the above Figure 4 The method comprises the following steps:

[0101] Step 400, the terminal receives the channel state information reference signal CSI-RS configuration information and the channel state information CSI report configuration information.

[0102] The terminal receives the CSI-RS configuration information and the CSI report configuration information sent by the network side device.

[0103] The CSI-RS configuration information is used to indicate multiple CMR subsets.

[0104] The CSI report configuration information is used to indicate how to report the CSI.

[0105] Step 401, the terminal performs measurement according to the CSI-RS configuration information, selects at least one CMR group from the multiple CMR subsets, and obtains the CSI.

[0106] In an implementation, the terminal selects one CMR group from the multiple CMR subsets, each CMR included in the CMR group belongs to a different CMR subset, and each CMR included in the CMR group corresponds to a different TRP.

[0107] In an implementation, the terminal selects multiple CMR groups from the multiple CMR subsets, each CMR included in one of the CMR groups belongs to a different CMR subset, each CMR included in one of the CMR groups corresponds to a different TRP, and the number of CMRs included in each of the multiple CMR groups is the same or different.

[0108] In the embodiments of the present application, the terminal selects at least one CMR group from the plurality of CMR subsets, and coherent joint transmission (CJT) of multiple TRPs can be realized.

[0109] At step 402, the terminal feeds back the CSI to the network side device according to the CSI reporting configuration information.

[0110] Optionally, the CSI includes one of the following:

[0111] one CSI corresponding to one CMR group;

[0112] one CSI corresponding to one CMR group;

[0113] one CSI corresponding to one CMR group;

[0114] Each CMR in one CMR group belongs to a different CMR subset, and the number of CMRs in each CMR group is the same or different.

[0115] In one embodiment, the terminal selects one CMR group from the plurality of CMR subsets, obtains CSI, and feeds back one CSI corresponding to the CMR group to the network side device, so as to realize CJT transmission of TRPs in the group, and the CSI includes CSI reference signal resource indicator (CRI), precoding matrix index (PMI), rank indicator (RI), channel quality indicator (CQI), etc.

[0116] In one embodiment, the terminal selects a plurality of CMR groups from the plurality of CMR subsets, obtains CSI, and feeds back one CSI corresponding to the plurality of CMR groups to the network side device, so as to realize hybrid transmission of CJT and NCJT, that is, TRPs in each CMR group are transmitted by CJT, and groups are transmitted by NCJT, and the CSI includes CRI, PMI, RI, CQI, etc.

[0117] In one embodiment, the terminal selects a plurality of CMR groups from the plurality of CMR subsets, obtains CSI, and feeds back a plurality of CSIs corresponding to the plurality of CMR groups to the network side device, so as to realize reporting of a plurality of possible CJT CSIs, and the network side device selects the optimal scheduling result.

[0118] For example, the network side device configures 6 CMR subsets for the terminal, selects 2 CMR groups, respectively including 3 CMR and 4 CMR, and feeds back the 2 CMR groups and their CSI, and the network side device can flexibly schedule 3 TRPs or 4 TRPs corresponding to the 2 CMR groups to perform service transmission to the terminal according to the situation.

[0119] As a special case, the multiple groups of CMR selected by the UE are in a nested relationship, for example:

[0120] Group 1: CMR0, CMR1;

[0121] Group 2: CMR0, CMR1, CMR2;

[0122] Group 3: CMR0, CMR1, CMR2, CMR3.

[0123] In this way, the terminal can report the resource indications (such as CRI) corresponding to CMR0, CMR1, CMR2, and CMR3, and the CSI1 corresponding to group 1, the CSI2 corresponding to group 2, and the CSI3 corresponding to group 3. Among them, CSI1 includes PMI 0 / p0 / θ0, PMI 1 / p1 / θ1, group 2 can only additionally feed back PMI2 / p2 / θ2, and group 3 can additionally feed back PMI3 / p3 / θ3. Among them, PMIi is the sub-precoding matrix indication corresponding to CMRi, pi is the amplitude or power information corresponding to CMRi, and θi is the phase information corresponding to CMRi.

[0124] Optionally, the CSI further includes at least one of the following:

[0125] X single-TRP corresponding CSI;

[0126] Y multi-TRP corresponding non-coherent joint transmission (NCJT) CSI;

[0127] Wherein, X and Y are integers greater than or equal to zero.

[0128] It can be understood that the CSI fed back by the terminal to the network side device can be the above-mentioned multi-TRP corresponding coherent joint transmission (CJT) CSI, i.e., one CMR group corresponds to one CSI, multiple CMR groups correspond to one CSI, or multiple CMR groups correspond to multiple CSI, or it can also include: X single-TRP corresponding CSI, Y multi-TRP corresponding non-coherent joint transmission (NCJT) CSI.

[0129] Wherein, X and Y are configurable.

[0130] The embodiment of the application can realize the mixed transmission mode of coherent joint transmission and non-coherent joint transmission in the case that only intra-TRP (i.e., corresponding multiple TRPs in one CMR group) coherent joint transmission and only non-coherent joint transmission between multiple TRPs (i.e., between TRPs corresponding to multiple CMR groups) are adopted in multiple TRPs, thereby improving the applicability and flexibility of CSI reporting.

[0131] Optionally, the CSI corresponding to the CMR group includes:

[0132] The CSI reference signal resource of the CMR group indicates CRI or N CRIs corresponding to N CMRs included in the CMR group.

[0133] N sub precoding matrix indicators (PMIs);

[0134] M1 sub PMIs correspond to phase information.

[0135] M2 sub PMIs correspond to amplitude or power information.

[0136] Each of the sub PMIs corresponds to one CMR; N is the number of CMRs included in each of the CMR groups; M1 and M2 are both integers greater than or equal to 0 and less than or equal to N.

[0137] It can be understood that the CSI corresponding to one CMR group includes the following contents: CRI, PMI, phase information, and amplitude or power information.

[0138] The CSI reference signal resource of the CMR group indicates CRI, which means that the CMR group corresponds to one CRI.

[0139] The N CRIs corresponding to the N CMRs included in the CMR group, that is, each CMR in the CMR group corresponds to one CRI, and N CRIs are reported.

[0140] M1 and M2 can be preset, configured by the network side, or determined by the terminal according to the size of the CSI reporting resource (PUCCH or PUSCH). The terminal determines according to the size of the CSI reporting resource (PUCCH or PUSCH) means that when the size of the CSI reporting resource (PUCCH or PUSCH) cannot send the phase information corresponding to the N sub PMIs or the amplitude or power information corresponding to the N sub PMIs, the terminal can discard part of the CSI content by adjusting M1 or M2 and not report. The sub PMI without feedback of phase information or amplitude or power information can adopt NCJT transmission.

[0141] The amplitude or power information represents amplitude information or power information.

[0142] Further, the amplitude or power information corresponding to the M2 sub-PMIs comprises at least one of:

[0143] M2-1 amplitude or power quantization values, wherein a maximum amplitude or power quantization value in the M2 amplitude or power quantization values is 1 and is not fed back;

[0144] A corresponding relationship between the M2 amplitude or power quantization values and the N sub-PMIs.

[0145] The M2 amplitude or power quantization values are quantization values of M2 maximum amplitude or power values corresponding to the N sub-PMIs.

[0146] Optionally, the greater the amplitude or power value, the higher or lower the quantization accuracy of the corresponding amplitude or power quantization value; and the quantization accuracy of the amplitude or power quantization value corresponding to different CMRs or transmission and reception points (TRPs) is preset or configured.

[0147] Optionally, the amplitude or power quantization can also adopt an equal-amplitude or equal-power quantization manner.

[0148] Further, the phase information corresponding to the M1 sub-PMIs comprises at least one of:

[0149] M1 phase quantization values;

[0150] A corresponding relationship between the M1 phase quantization values and the N sub-PMIs;

[0151] The M1 phase quantization values are quantization values of phases corresponding to M1 sub-PMIs with maximum amplitude or power values.

[0152] Optionally, the greater the amplitude or power value, the higher the quantization accuracy of the corresponding phase quantization value; and the quantization accuracy of the phase quantization value corresponding to different CMRs or transmission and reception points (TRPs) is preset or configured.

[0153] Optionally, the phase quantization can also adopt an equal-interval quantization manner.

[0154] It should be noted that the corresponding relationship between the M2 amplitude or power quantization values and the N sub-PMIs is optionally reported, and the corresponding relationship between the M1 phase quantization values and the N sub-PMIs is optionally reported.

[0155] Example 1: one CMR group contains N CMRs, N CRIs corresponding to the N CMRs are reported, the CRIs are reported in the order of the amplitudes or powers of the measured CMRs from large to small, and the reported N sub-PMIs correspond to the N CMRs in the order indicated by the N CRIs. In this way, the amplitude or power quantization values corresponding to the M2 sub-PMIs reported by the terminal are the amplitude or power quantization values of the sub-PMIs corresponding to the first M2 CRIs, and the phase quantization values corresponding to the M1 sub-PMIs reported by the terminal are the phase quantization values of the sub-PMIs corresponding to the first M1 CRIs. At this time, the correspondence between the amplitude or power quantization values corresponding to the M2 sub-PMIs and the N sub-PMIs and the correspondence between the phase quantization values corresponding to the M1 sub-PMIs and the N sub-PMIs are very clear, and do not need to be reported in the CSI.

[0156] Example 2: one CMR group contains N CMRs, one CRI is reported to indicate the CMR group, and the amplitudes or powers of the N CMRs in the CMR group can not have a specific order, and the N sub-PMIs reported correspond to the N CMRs. At this time, in addition to reporting the amplitude or power quantization values corresponding to the M2 sub-PMIs and the phase quantization values corresponding to the M1 sub-PMIs, the terminal also needs to report in the CSI the correspondence between the amplitude or power quantization values corresponding to the M2 sub-PMIs and the N sub-PMIs, and the correspondence between the phase quantization values corresponding to the M1 sub-PMIs and the N sub-PMIs. For example, N bitmap bits are used to indicate the correspondence, the nth bitmap bit is 1, indicating that the nth sub-PMI has corresponding amplitude or power quantization values / phase quantization values, and 0, indicating that the nth sub-PMI has no corresponding amplitude or power quantization values / phase quantization values.

[0157] The CSI feedback method provided by the embodiments of the present application includes the following steps: a terminal selects at least one CMR group from a plurality of CMR subsets, and feeds back CSI including CRI, sub-PMI, phase information and amplitude or power information to a network side device, thereby realizing the association of channel measurement between a plurality of TRPs and the terminal and realizing coherent joint transmission of the plurality of TRPs.

[0158] Optionally, before the terminal feeds back the CSI to the network side device according to the CSI reporting configuration information, the method further includes the following steps:

[0159] According to the amplitude or power information corresponding to the N sub-PMIs, the priority of the N sub-PMIs is determined.

[0160] The terminal feeds back the CSI to the network side device according to the CSI reporting configuration information, including the following steps:

[0161] According to the priority of the N sub-PMIs, the terminal feeds back the PMI, phase information and amplitude or power information corresponding to part of the N sub-PMIs to the network side device.

[0162] Optionally, in the case of insufficient feedback resources, i.e. limited feedback channel capacity, the terminal determines the priority of the N sub-PMIs according to the amplitude or power information corresponding to the N sub-PMIs, wherein the greater the amplitude or power quantization value, the higher the priority, and then reports the PMI, phase information and amplitude or power information corresponding to the sub-PMI with higher priority according to the priority of the N sub-PMIs, i.e. the sub-PMI with higher priority realizes CJT transmission, and the other sub-PMIs with relatively low priority realize NCJT transmission.

[0163] Optionally, the method further comprises:

[0164] The terminal calculates the precoding matrix according to the phase information corresponding to the N sub-PMIs and the amplitude or power information corresponding to the M2 sub-PMIs using the following formula:

[0165] W new =[p1θ1W1 p2θ2W2 … p N θ N W N ]

[0166] wherein W new is the precoding matrix, W n is the precoding matrix corresponding to the nth sub-PMI, p n is the amplitude information or power information corresponding to the nth sub-PMI, θ n is the phase information corresponding to the nth sub-PMI, n = 1, 2, … N, in the case that the CSI does not include the amplitude information or power information corresponding to the nth sub-PMI, the p n is 0 or 1; in the case that the CSI does not include the phase information corresponding to the nth sub-PMI, the θ n is 0 or 1.

[0167] It should be noted that the above precoding matrix can be for all transmission layers or for each transmission layer. When it is for all transmission layers, W n is the precoding matrix of all transmission layers corresponding to the nth sub-PMI, i.e. the same p n , θ n is used for all transmission layers; when it is for each transmission layer, W n is the precoding matrix of one transmission layer corresponding to the nth sub-PMI, i.e. different p n , θ n may be used for all transmission layers, in which case the CSI report needs to include RI W n , p n , θ n , to obtain RI W hew , wherein RI is the number of transmission layers reported by the terminal.

[0168] The terminal calculates the precoding matrix and determines channel parameters such as RI and CQI based on the precoding matrix to report CSI.

[0169] Figure 5 This is a second schematic flowchart illustrating the CSI feedback method provided in an embodiment of this application. Figure 5 As shown, the method includes the following steps:

[0170] Step 500: The network-side device sends the Channel State Information Reference Signal (CSI-RS) configuration information and the Channel State Information Report (CSI) configuration information to the terminal.

[0171] Step 501: The network-side device receives the Channel Status Information (CSI) fed back by the terminal.

[0172] It should be noted that the CSI feedback method provided in this application embodiment uses a network-side device as the execution entity, and is consistent with... Figure 4 The CSI feedback methods with terminals as the execution subject shown belong to the same inventive concept. Therefore, for the understanding of the CSI feedback methods with network-side devices as the execution subject in the embodiments of this application, you can refer to the description in the foregoing embodiments of CSI feedback methods with terminals as the execution subject, which will not be repeated here.

[0173] Optionally, the CSI includes one of the following:

[0174] One CMR group corresponds to one CSI;

[0175] One CSI corresponding to multiple CMR groups;

[0176] Multiple CMR groups correspond to multiple CSIs, where one CMR group corresponds to one CSI;

[0177] In this context, each CMR contained in a CMR group belongs to a different subset of CMRs, and each CMR group in the plurality of CMR groups may contain the same or different number of CMRs.

[0178] Optionally, the CSI further includes at least one of the following:

[0179] CSI corresponding to X single TRPs;

[0180] Y non-coherent joint transmission NCJT CSI corresponding to multiple TRPs;

[0181] Where X and Y are integers greater than or equal to zero.

[0182] Optionally, the CSI corresponding to the CMR group includes:

[0183] The CSI reference signal resource corresponding to the CMR group is indicated by CRI, or N CRIs corresponding to N CMRs included in the CMR group;

[0184] N sub-precoding matrix indicators (PMIs);

[0185] M1 sub-PMIs correspond to phase information;

[0186] M2 sub-PMIs correspond to amplitude or power information;

[0187] Each of the sub-PMIs corresponds to a CMR; N is the number of CMRs included in each of the CMR groups; M1 and M2 are both integers greater than or equal to 0 and less than or equal to N.

[0188] Optionally, the amplitude or power information corresponding to the M2 sub-PMIs includes at least one of the following:

[0189] M2-1 amplitude or power quantization values, wherein the maximum amplitude or power quantization value among the M2 amplitude or power quantization values is 1 and is not fed back;

[0190] A correspondence between the M2 amplitude or power quantization values and the N sub-PMIs;

[0191] The M2 amplitude or power quantization values corresponding to the M2 sub-PMIs are quantization values of the M2 largest amplitude or power values corresponding to the N sub-PMIs.

[0192] Optionally, the larger the amplitude or power value, the higher or lower the quantization accuracy of the corresponding amplitude or power quantization value; the quantization accuracy of the amplitude or power quantization value corresponding to different CMRs or transmission and reception points (TRPs) is preset or configured.

[0193] Optionally, the phase information corresponding to the M1 sub-PMIs includes at least one of the following:

[0194] M1 phase quantization values;

[0195] A correspondence between the M1 phase quantization values and the N sub-PMIs;

[0196] The M1 phase quantization values are phase quantization values corresponding to M1 sub-PMIs with the largest amplitude or power values.

[0197] Optionally, the larger the amplitude or power value, the higher the quantization accuracy of the corresponding phase quantization value; the quantization accuracy of the phase quantization value corresponding to different CMRs or transmission and reception points (TRPs) is preset or configured.

[0198] The CSI feedback method provided in the embodiments of the present application comprises the following steps: a network side device receives CSI fed back by a terminal, wherein the CSI comprises CRI, sub-PMI, phase information and amplitude or power information, and coherent joint transmission of multiple TRPs is realized.

[0199] Optionally, the method further comprises:

[0200] The network side device calculates a precoding matrix according to the N sub-PMIs, phase information corresponding to the M1 sub-PMIs and amplitude or power information corresponding to the M2 sub-PMIs, and utilizes the following formula:

[0201] W new =[p1θ1W1 p2θ2W2 … p N θ N W N ]

[0202] Wherein, W new is a precoding matrix, W n is a precoding matrix corresponding to the nth sub-PMI, p n is amplitude information or power information corresponding to the nth sub-PMI, θ n is phase information corresponding to the nth sub-PMI, n = 1, 2, … N, in the case that the CSI does not comprise amplitude information or power information corresponding to the nth sub-PMI, the p n is 0 or 1; in the case that the CSI does not comprise phase information corresponding to the nth sub-PMI, the θ n is 0 or 1.

[0203] Optionally, the method further comprises:

[0204] Determining a channel parameter according to the precoding matrix;

[0205] Wherein, the channel parameter comprises at least one of the following: rank indication (RI) of a channel matrix, channel quality indication (CQI).

[0206] It can be understood that the network side device calculates a precoding matrix according to the N sub-PMIs, phase information corresponding to the M1 sub-PMIs and amplitude or power information corresponding to the M2 sub-PMIs in the CSI fed back by the terminal, and utilizes the precoding matrix to precode a data signal to be transmitted.

[0207] Figure 6 Fig. 1 is a structural schematic diagram of a CSI-RS configuration device provided in the embodiments of the present application, as shown in the figure, the CSI-RS configuration device 600 comprises: Figure 6

[0208] A first receiving unit 610, configured to receive channel state information reference signal (CSI-RS) configuration information;​

[0209] The CSI-RS configuration information is used for indicating an association relationship between a CSI-RS port and multiple groups of quasi co-location (QCL) reference sources.

[0210] In the embodiments of the present application, the CSI-RS configuration information indicates an association relationship between a CSI-RS port and multiple groups of QCL, and the association between multiple TRPs and a terminal in channel measurement is achieved.

[0211] Optionally, the CSI-RS configuration information includes at least one CSI-RS resource, wherein one CSI-RS resource includes at least one CSI-RS port.

[0212] Each of the CSI-RS ports is associated with multiple first transmission configuration indication (TCI) states or multiple groups of QCL reference sources, and one of the first TCI states corresponds to one group of QCL reference sources.

[0213] Alternatively, each of the CSI-RS ports is associated with one second TCI state, and the second TCI state corresponds to multiple groups of QCL reference sources.

[0214] Optionally, the CSI-RS resource further satisfies at least one of the following conditions:

[0215] Each of the groups of QCL reference sources includes at least one QCL reference source.

[0216] In the case where each of the CSI-RS ports is associated with multiple groups of QCL reference sources, the number and type of QCL reference sources included in each of the groups of QCL reference sources in the multiple groups of QCL are the same.

[0217] In the case where each of the CSI-RS ports is associated with multiple groups of QCL reference sources, the number and / or type of QCL reference sources included in each of the groups of QCL reference sources in the multiple groups of QCL reference sources are different.

[0218] In the case where each of the groups of QCL reference sources includes two QCL reference sources, one of the two QCL reference sources is of a QCL-TypeD type.

[0219] A channel state information interference measurement (CSI-IM) resource corresponding to the CSI-RS resource has the same QCL assumption as the CSI-RS resource.

[0220] Optionally, the CSI-RS resource includes a CSI-RS resource for channel measurement and a CSI-RS resource for interference measurement.

[0221] Optionally, the CSI-RS configuration information is used for coherent joint transmission, and channel state information, CSI, feedback based on the CSI-RS configuration information is non-precoding matrix indication, non-PMI, based CSI feedback.

[0222] The CSI-RS configuration device provided in the embodiments of the present application can realize the association of channel measurement between multiple TRPs and terminals by receiving the CSI-RS configuration information sent by the network side device to indicate the association relationship between the CSI-RS port and the multiple groups of QCL, and can be applicable to the coherent joint transmission scenario of multiple TRPs.

[0223] The CSI-RS configuration device in the embodiments of the present application can be a device, a device with an operating system, or an electronic device, and can also be a component in a terminal, an integrated circuit, or a chip. The device or the electronic device can be a mobile terminal or a non-mobile terminal. Illustratively, the mobile terminal can include, but is not limited to, the types of the terminal 11 listed above, and the non-mobile terminal can be a server, a network attached storage (NAS), a personal computer (PC), a television (TV), a teller machine, or a self-service machine, etc., and the embodiments of the present application are not limited specifically.

[0224] The CSI-RS configuration device provided in the embodiments of the present application can realize the method embodiments Figure 2 The method embodiments realize various processes and achieve the same technical effects, and to avoid repetition, details are not repeated here.

[0225] Figure 7 The second structure diagram of the CSI-RS configuration device provided in the embodiments of the present application is shown in FIG. 7, which includes: Figure 7

[0226] The first sending unit 710 is configured to send channel state information reference signal, CSI-RS, configuration information to a terminal.

[0227] The CSI-RS configuration information is used to indicate the association relationship between the CSI-RS port and the multiple groups of QCL reference sources.

[0228] Optionally, the CSI-RS configuration information includes at least one CSI-RS resource, and one CSI-RS resource includes at least one CSI-RS port.

[0229] Each of the CSI-RS ports is associated with multiple first transmission configuration indication, TCI, states or multiple groups of QCL reference sources, and one TCI state corresponds to one group of QCL reference sources. ​

[0230] Alternatively, each of the CSI-RS ports is associated with a second TCI state, wherein the second TCI state corresponds to multiple groups of QCL reference sources.

[0231] Optionally, the CSI-RS resource further satisfies at least one of the following conditions:

[0232] Each of the groups of QCL reference sources includes at least one QCL reference source;

[0233] In the case that each of the CSI-RS ports is associated with multiple groups of QCL reference sources, the multiple groups of QCL reference sources have the same number and type of QCL reference sources in each group of QCL reference sources;

[0234] In the case that each of the CSI-RS ports is associated with multiple groups of QCL reference sources, the multiple groups of QCL reference sources have different number and / or type of QCL reference sources in each group of QCL reference sources;

[0235] In the case that each of the groups of QCL reference sources includes two QCL reference sources, one of the two QCL reference sources is of QCL-TypeD;

[0236] The channel state information interference measurement, CSI-IM, resource corresponding to the CSI-RS resource has the same QCL assumption as the CSI-RS resource.

[0237] Optionally, the CSI-RS resource includes a CSI-RS resource for channel measurement and a CSI-RS resource for interference measurement.

[0238] Optionally, the CSI-RS configuration information is used for coherent joint transmission, and the channel state information, CSI, feedback based on the CSI-RS configuration information is non-precoding matrix indication, non-PMI, based CSI feedback.

[0239] The CSI-RS configuration device provided by the embodiments of the present application sends CSI-RS configuration information for indicating the association relationship between the CSI-RS port and the multiple groups of QCL to the terminal, realizes the association of the channel measurement between the multiple TRPs and the terminal, and is applicable to the coherent joint transmission scenario of the multiple TRPs.

[0240] The CSI-RS configuration device in the embodiments of the present application can be a device, a device with an operating system, or an electronic device, and can also be a component in a terminal, an integrated circuit, or a chip. The device or electronic device can be a mobile terminal or a non-mobile terminal. Illustratively, the mobile terminal can include, but is not limited to, the types of terminal 11 listed above, and the non-mobile terminal can be a server, a network attached storage (NAS), a personal computer (PC), a television (TV), a teller machine, or a self-service machine, and the like, and the embodiments of the present application are not limited specifically.

[0241] The CSI-RS configuration device provided in the embodiments of the present application can implement the method embodiments Figure 3 The method embodiments implement various processes and achieve the same technical effects, and to avoid repetition, details are not repeated here.

[0242] It should be noted that the CSI feedback method provided in the embodiments of the present application can be executed by a CSI feedback device, or a control module in the CSI feedback device for executing the CSI feedback method. In the embodiments of the present application, the CSI feedback device executes the CSI feedback method as an example to illustrate the CSI feedback device provided in the embodiments of the present application.

[0243] Figure 8 One of the structural diagrams of the CSI feedback device provided in the embodiments of the present application is shown in FIG. 8, which includes: Figure 8

[0244] The second receiving unit 810 is configured to receive channel state information reference signal (CSI-RS) configuration information and channel state information (CSI) report configuration information.

[0245] The measurement unit 820 is configured to measure according to the CSI-RS configuration information, select at least one channel measurement resource (CMR) group from a plurality of CMR subsets, and obtain CSI.

[0246] The feedback unit 830 is configured to feed back the CSI to a network side device according to the CSI report configuration information.

[0247] The CSI feedback device provided in the embodiments of the present application can select at least one CMR group from a plurality of CMR subsets, and can implement coherent joint transmission of multiple TRPs.

[0248] Optionally, the CSI includes one of the following:

[0249] One CMR group corresponds to one CSI.

[0250] ​one CSI corresponding to one CMR group;

[0251] a plurality of CSIs corresponding to a plurality of CMR groups, wherein one CSI corresponds to one CMR group;

[0252] wherein each CMR in one CMR group belongs to a different CMR subset, and the number of CMRs in each CMR group is the same or different.

[0253] Optionally, the CSI further comprises at least one of:

[0254] X CSIs corresponding to X single-TRPs;

[0255] Y non-coherent joint transmission (NCJT) CSIs corresponding to Y multi-TRPs;

[0256] wherein X and Y are integers greater than or equal to zero.

[0257] Optionally, the CSI corresponding to the CMR group comprises:

[0258] a CSI reference signal resource indication (CRI) of the CMR group or N CRIs corresponding to N CMRs included in the CMR group;

[0259] N sub-precoding matrix indicators (PMIs);

[0260] phase information corresponding to M1 sub-PMIs;

[0261] amplitude or power information corresponding to M2 sub-PMIs;

[0262] wherein each sub-PMI corresponds to one CMR; N is the number of CMRs included in each CMR group; M1 and M2 are integers greater than or equal to 0 and less than or equal to N.

[0263] Optionally, the amplitude or power information corresponding to the M2 sub-PMIs comprises at least one of:

[0264] M2-1 amplitude or power quantization values, wherein the maximum amplitude or power quantization value in the M2 amplitude or power quantization values is 1 and is not fed back;

[0265] a correspondence between the M2 amplitude or power quantization values and the N sub-PMIs;

[0266] wherein the amplitude or power quantization values corresponding to the M2 sub-PMIs are quantization values of the maximum M2 amplitude or power values corresponding to the N sub-PMIs.

[0267] Optionally, the larger the amplitude or power value, the higher or lower the quantization accuracy of the corresponding amplitude or power quantization value; the quantization accuracy of the amplitude or power quantization value corresponding to different CMRs or transmit / receive points (TRPs) can be preset or configured.

[0268] Optionally, the phase information corresponding to the M1 sub-PMIs includes at least one of the following:

[0269] M1 phase quantization values;

[0270] The correspondence between M1 phase quantization values ​​and N sub-PMIs;

[0271] Among them, the M1 phase quantization values ​​are the phase quantization values ​​corresponding to the M1 sub-PMIs with the largest amplitude or power values.

[0272] Optionally, the larger the amplitude or power value, the higher the quantization accuracy of the corresponding phase quantization value; the quantization accuracy of the phase quantization value corresponding to different CMRs or transmit / receive points (TRPs) can be preset or configured.

[0273] Optionally, it also includes:

[0274] The first determining unit is used to determine the priority of the N sub-PMIs based on the amplitude or power information corresponding to the N sub-PMIs;

[0275] The feedback unit is used for:

[0276] Based on the priority of the N sub-PMIs, feed back to the network-side device the PMI, phase information, and amplitude or power information corresponding to some of the N sub-PMIs.

[0277] Optionally, it also includes: a first computing unit, used for:

[0278] Based on the phase information corresponding to the N sub-PMIs, M1 sub-PMIs, and the amplitude or power information corresponding to the M2 sub-PMIs, the precoding matrix is ​​calculated using the following formula:

[0279] W new =[p1θ1W1 p2θ2W2 … p N θ N W N ]

[0280] Among them, W new W is the precoding matrix. n Let p be the precoding matrix corresponding to the nth sub-PMI. n For the amplitude or power information corresponding to the nth sub-PMI, θ nThe phase information corresponding to the nth sub-PMI, n = 1, 2, … N, in the case that the CSI does not include the amplitude information or the power information corresponding to the nth sub-PMI, the p n is 0 or 1; in the case that the CSI does not include the phase information corresponding to the nth sub-PMI, the θ n is 0 or 1.

[0281] The CSI feedback method provided by the embodiment of the application, the terminal selects at least one CMR group from a plurality of channel measurement resource (CMR) subsets, and the CSI fed back to the network side device includes CRI, sub-PMI, phase information and amplitude or power information, the association of channel measurement between a plurality of TRPs and the terminal is realized, and the coherent joint transmission of the multi-TRP is realized.

[0282] The CSI feedback device in the embodiment of the application can be a device, a device with an operating system or an electronic device, or a component in a terminal, an integrated circuit or a chip. The device or the electronic device can be a mobile terminal or a non-mobile terminal. Illustratively, the mobile terminal can include, but is not limited to, the types of the terminal 11 listed above, and the non-mobile terminal can be a server, a network attached storage (NAS), a personal computer (PC), a television (TV), a teller machine or a self-service machine, etc., and the embodiment of the application is not limited specifically.

[0283] The CSI feedback device provided by the embodiment of the application can realize the method embodiment of the method and achieve the same technical effect, and thus the details are not repeated here. Figure 4 The method embodiment realizes each process, and achieves the same technical effect, and thus the details are not repeated here.

[0284] Figure 9 The second structure diagram of the CSI feedback device provided by the embodiment of the application is shown in FIG. 9, which includes: Figure 9

[0285] The second sending unit 910 is configured to send channel state information reference signal (CSI-RS) configuration information and channel state information (CSI) report configuration information to the terminal.

[0286] The third receiving unit 920 is configured to receive channel state information (CSI) fed back by the terminal.

[0287] Optionally, the CSI includes one of the following:

[0288] One CSI corresponding to one CMR group;

[0289] One CSI corresponding to a plurality of CMR groups; ​

[0290] a plurality of CSIs corresponding to a plurality of CMR groups, wherein one CMR group corresponds to one CSI;

[0291] Each CMR in one of the CMR groups belongs to a different CMR subset, and the number of CMRs in each of the plurality of CMR groups is the same or different.

[0292] Optionally, the CSI further comprises at least one of:

[0293] X single-TRP corresponding CSI;

[0294] Y multi-TRP corresponding non-coherent joint transmission (NCJT) CSI;

[0295] Wherein, X and Y are integers greater than or equal to zero.

[0296] Optionally, the CSI corresponding to the CMR group comprises:

[0297] CSI reference signal resource indication (CRI) of the CMR group or N CRIs corresponding to N CMRs included in the CMR group;

[0298] N sub-precoding matrix indicators (PMIs);

[0299] Phase information corresponding to M1 sub-PMIs;

[0300] Amplitude or power information corresponding to M2 sub-PMIs;

[0301] Wherein, each of the sub-PMIs corresponds to one CMR; N is the number of CMRs included in each of the CMR groups; M1 and M2 are integers greater than or equal to 0 and less than or equal to N.

[0302] Optionally, the amplitude or power information corresponding to the M2 sub-PMIs comprises at least one of:

[0303] M2-1 amplitude or power quantization values, wherein the maximum amplitude or power quantization value in the M2 amplitude or power quantization values is 1 and is not fed back;

[0304] Corresponding relationship between the M2 amplitude or power quantization values and the N sub-PMIs;

[0305] Wherein, the amplitude or power quantization values corresponding to the M2 sub-PMIs are quantization values of the M2 largest amplitude or power values corresponding to the N sub-PMIs.

[0306] Optionally, the greater the amplitude or power value, the higher or lower the quantization precision of the corresponding amplitude or power quantization value; the quantization precision of the amplitude or power quantization value corresponding to different CMRs or transmission and reception points (TRPs) is pre-settable or configurable.

[0307] Optionally, the phase information corresponding to the M1 sub-PMIs includes at least one of the following:

[0308] M1 phase quantization values;

[0309] A corresponding relationship between the M1 phase quantization values and the N sub-PMIs;

[0310] The M1 phase quantization values are phase quantization values corresponding to M1 sub-PMIs with the largest amplitude or power values.

[0311] Optionally, the greater the amplitude or power value, the higher the quantization precision of the corresponding phase quantization value; the quantization precision of the phase quantization value corresponding to different CMRs or transmission and reception points (TRPs) is pre-settable or configurable.

[0312] Optionally, the method further comprises:

[0313] According to the N sub-PMIs, the phase information corresponding to the M1 sub-PMIs, and the amplitude or power information corresponding to the M2 sub-PMIs, a precoding matrix is calculated using the following formula:

[0314] W new =[p1θ1W1 p2θ2W2 … p N θ N W N ]

[0315] wherein W new is the precoding matrix, W n is a precoding matrix corresponding to the nth sub-PMI, p n is amplitude information or power information corresponding to the nth sub-PMI, θ n is phase information corresponding to the nth sub-PMI, n = 1, 2, … N, in the case where the CSI does not include amplitude information or power information corresponding to the nth sub-PMI, the p n is 0 or 1; in the case where the CSI does not include phase information corresponding to the nth sub-PMI, the θ n is 0 or 1.

[0316] Optionally, the method further comprises:

[0317] The second determining unit is configured to determine a channel parameter according to the precoding matrix.

[0318] The channel parameters include at least one of the following: a rank indication (RI) of a channel matrix, and a channel quality indication (CQI).

[0319] The CSI feedback apparatus provided in the embodiments of the present application receives CSI fed back by a terminal, the CSI including CRI, sub-PMI, phase information, and amplitude or power information, and realizes coherent joint transmission of multiple TRPs.

[0320] The CSI feedback apparatus in the embodiments of the present application can be an apparatus, an apparatus with an operating system, or an electronic device, and can also be a component in a terminal, an integrated circuit, or a chip. The apparatus or the electronic device can be a mobile terminal or a non-mobile terminal. Exemplarily, the mobile terminal can include, but is not limited to, the types of the terminal 11 listed above, and the non-mobile terminal can be a server, a network attached storage (NAS), a personal computer (PC), a television (TV), a cashier machine, or a self-service machine, and the like, which are not limited in the embodiments of the present application.

[0321] The CSI feedback apparatus provided in the embodiments of the present application can realize the processes of the method embodiments and achieve the same technical effects, and thus details are not repeated here. Figure 5 The method embodiments realize the various processes and achieve the same technical effects, and thus details are not repeated here.

[0322] Optionally, as shown in Figure 10 The communication device 1000 is a terminal, and the program or the instruction stored in the memory 1002 and executable on the processor 1001 realizes the various processes of the CSI-RS configuration method or the CSI feedback method embodiments and achieves the same technical effects when executed by the processor 1001. The communication device 1000 is a network side device, and the program or the instruction stored in the memory 1002 and executable on the processor 1001 realizes the various processes of the CSI-RS configuration method or the CSI feedback method embodiments and achieves the same technical effects when executed by the processor 1001. Details are not repeated here to avoid repetition.

[0323] The embodiment of the application further provides a terminal, comprising a processor and a communication interface, the communication interface is used for receiving channel state information reference signal (CSI-RS) configuration information; wherein the CSI-RS configuration information is used for indicating the association relationship between a CSI-RS port and multiple groups of quasi co-located (QCL) reference sources. Alternatively, the communication interface is used for receiving channel state information reference signal (CSI-RS) configuration information and channel state information (CSI) report configuration information, the processor is used for measuring according to the CSI-RS configuration information, selecting at least one channel measurement resource (CMR) group from multiple CMR subsets, and obtaining CSI; the communication interface is further used for feeding back the CSI to a network side device according to the CSI report configuration information. The terminal embodiment is corresponding to the terminal side method embodiment described above, each implementation process and implementation manner of the method embodiment can be applied to the terminal embodiment, and the same technical effects can be achieved. Specifically, Figure 11 A hardware structure diagram of a terminal for implementing the embodiment of the application.

[0324] The terminal 1100 includes, but is not limited to, at least part of components such as a radio frequency unit 1101, a network module 1102, an audio output unit 1103, an input unit 1104, a sensor 1105, a display unit 1106, a user input unit 1107, an interface unit 1108, a memory 1109, and a processor 1110.

[0325] Those skilled in the art can understand that the terminal 1100 can further include a power supply (such as a battery) for supplying power to each component, and the power supply can be logically connected to the processor 1110 through a power management system, so as to realize functions such as management of charging, discharging, and power consumption management through the power management system. Figure 11 The terminal structure shown in the figure does not constitute a limitation on the terminal, and the terminal can include more or fewer components than the figure, or combine certain components, or different component arrangements, which are not described here.

[0326] It should be understood that in the embodiments of the present application, the input unit 1104 can include a graphics processing unit (GPU) 11041 and a microphone 11042. The graphics processing unit 11041 processes image data of a still picture or a video obtained by an image capture device (such as a camera) in a video capture mode or an image capture mode. The display unit 1106 can include a display panel 11061, which can be configured in the form of a liquid crystal display, an organic light-emitting diode, etc. The user input unit 1107 includes a touch panel 11071 and other input devices 11072. The touch panel 11071 is also called a touch screen. The touch panel 11071 can include two parts of a touch detection device and a touch controller. The other input devices 11072 can include, but are not limited to, a physical keyboard, function keys (such as volume control keys, on-off keys, etc.), trackballs, mice, joysticks, and the like, which will not be described here.

[0327] In the embodiments of the present application, the radio frequency unit 1101 receives the downlink data from the network side device and processes it by the processor 1110. In addition, the radio frequency unit 1101 sends the uplink data to the network side device. Generally, the radio frequency unit 1101 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, etc.

[0328] The memory 1109 can be used to store software programs or instructions and various data. The memory 1109 can mainly include a program or instruction storage area and a data storage area, wherein the program or instruction storage area can store an operating system, at least one application program or instruction required by a function (such as a sound playing function, an image playing function, etc.), etc. In addition, the memory 1109 can include a high-speed random access memory, and can also include a non-volatile memory, which 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. For example, at least one magnetic disk storage device, a flash memory device, or other non-volatile solid-state memory device.

[0329] The processor 1110 can include one or more processing units; optionally, the processor 1110 can integrate an application processor and a modem processor, wherein the application processor mainly processes an operating system, a user interface, and an application program or instruction, etc., and the modem processor mainly processes wireless communication, such as a baseband processor. It can be understood that the above-mentioned modem processor can also not be integrated into the processor 1110.

[0330] The radio frequency unit 1101 is configured to receive channel state information reference signal (CSI-RS) configuration information.

[0331] The CSI-RS configuration information is used to indicate the association relationship between a CSI-RS port and multiple groups of quasi co-location (QCL) reference sources.

[0332] In the embodiments of the present application, the CSI-RS configuration information indicates the association relationship between a CSI-RS port and multiple groups of QCL, thereby realizing the association of channel measurement between multiple TRPs and a terminal.

[0333] Optionally, the CSI-RS configuration information includes at least one CSI-RS resource, wherein one CSI-RS resource includes at least one CSI-RS port.

[0334] Each of the CSI-RS ports is associated with multiple first transmission configuration indication (TCI) states or multiple groups of QCL reference sources, and one of the first TCI states corresponds to one group of QCL reference sources.

[0335] Alternatively, each of the CSI-RS ports is associated with one second TCI state, and the second TCI state corresponds to multiple groups of QCL reference sources.

[0336] Optionally, the CSI-RS resource further satisfies at least one of the following conditions:

[0337] Each of the groups of QCL reference sources includes at least one QCL reference source.

[0338] In the case where each of the CSI-RS ports is associated with multiple groups of QCL reference sources, the number and type of QCL reference sources included in each of the groups of QCL reference sources in the multiple groups of QCL are the same.

[0339] In the case where each of the CSI-RS ports is associated with multiple groups of QCL reference sources, the number and / or type of QCL reference sources included in each of the groups of QCL reference sources in the multiple groups of QCL reference sources are different.

[0340] In the case where each of the groups of QCL reference sources includes two QCL reference sources, one of the two QCL reference sources is of the type of QCL-TypeD.

[0341] A channel state information interference measurement (CSI-IM) resource corresponding to the CSI-RS resource has the same QCL assumption as the CSI-RS resource.

[0342] Optionally, the CSI-RS resource includes a CSI-RS resource for channel measurement and a CSI-RS resource for interference measurement.

[0343] Optionally, the CSI-RS configuration information is used for coherent joint transmission, and channel state information, CSI, feedback based on the CSI-RS configuration information is non-precoding matrix indication, non-PMI, based CSI feedback.

[0344] In the embodiment of the present application, the terminal receives the CSI-RS configuration information sent by the network side device to indicate the association relationship between the CSI-RS port and the multiple QCL groups, and realizes the association of channel measurement between multiple TRPs and the terminal, which can be applied to the coherent joint transmission scenario of multiple TRPs.

[0345] Alternatively,

[0346] The radio frequency unit 1101 is configured to receive channel state information reference signal, CSI-RS, configuration information and channel state information, CSI, reporting configuration information.

[0347] The processor 1110 is configured to measure according to the CSI-RS configuration information, select at least one channel measurement resource, CMR, group from multiple CMR subsets, and obtain CSI.

[0348] The radio frequency unit 1101 is further configured to feed back the CSI to the network side device according to the CSI reporting configuration information.

[0349] In the embodiment of the present application, the terminal selects at least one CMR group from multiple CMR subsets, which can realize coherent joint transmission of multiple TRPs.

[0350] Optionally, the CSI includes one of the following:

[0351] One CSI corresponding to one CMR group;

[0352] One CSI corresponding to multiple CMR groups;

[0353] Multiple CSIs corresponding to multiple CMR groups, wherein one CMR group corresponds to one CSI;

[0354] Each CMR contained in one of the CMR groups belongs to a different CMR subset, and the number of CMRs contained in each CMR group in the multiple CMR groups is the same or different.

[0355] Optionally, the CSI further includes at least one of the following:

[0356] X single-TRP corresponding CSI;

[0357] Y multiple-TRP corresponding non-coherent joint transmission, NCJT, CSI;

[0358] Wherein, X and Y are integers greater than or equal to zero.

[0359] Optionally, the CSI corresponding to the CMR group comprises:

[0360] The CSI reference signal resource of the CMR group indicates a CRI or N CRIs corresponding to N CMRs included in the CMR group;

[0361] N sub-precoding matrix indicators (PMIs);

[0362] M1 sub-PMIs correspond to phase information;

[0363] M2 sub-PMIs correspond to amplitude or power information;

[0364] Wherein, each of the sub-PMIs corresponds to one CMR; N is the number of CMRs included in each of the CMR groups; M1 and M2 are both integers greater than or equal to 0 and less than or equal to N.

[0365] Optionally, the amplitude or power information corresponding to the M2 sub-PMIs comprises at least one of:

[0366] M2-1 amplitude or power quantization values, wherein the maximum amplitude or power quantization value among the M2 amplitude or power quantization values is 1 and is not fed back;

[0367] A correspondence between the M2 amplitude or power quantization values and the N sub-PMIs;

[0368] Wherein, the M2 amplitude or power quantization values are quantization values of the M2 largest amplitude or power values corresponding to the N sub-PMIs.

[0369] Optionally, the larger the amplitude or power value is, the higher or lower the quantization accuracy of the corresponding amplitude or power quantization value is; the quantization accuracy of the amplitude or power quantization value corresponding to different CMRs or transmission and reception points (TRPs) is presettable or configurable.

[0370] Optionally, the phase information corresponding to the M1 sub-PMIs comprises at least one of:

[0371] M1 phase quantization values;

[0372] A correspondence between the M1 phase quantization values and the N sub-PMIs;

[0373] Wherein, the M1 phase quantization values are phase quantization values corresponding to the M1 sub-PMIs with the largest amplitude or power values.

[0374] Optionally, the larger the amplitude or power value is, the higher the quantization accuracy of the corresponding phase quantization value is; the quantization accuracy of the phase quantization value corresponding to different CMRs or transmission and reception points (TRPs) is presettable or configurable.

[0375] Optionally, the processor 1110 is also used for:

[0376] The priority of the N sub-PMIs is determined based on the amplitude or power information corresponding to the N sub-PMIs;

[0377] The radio frequency unit 1101 is also used for:

[0378] Based on the priority of the N sub-PMIs, feed back to the network-side device the PMI, phase information, and amplitude or power information corresponding to some of the N sub-PMIs.

[0379] Optionally, the processor 1110 is also used for:

[0380] Based on the phase information corresponding to the N sub-PMIs, M1 sub-PMIs, and the amplitude or power information corresponding to the M2 sub-PMIs, the precoding matrix is ​​calculated using the following formula:

[0381] W new =[p1θ1W1 p2θ2W2 … p N θ N W N ]

[0382] Among them, W new W is the precoding matrix. n Let p be the precoding matrix corresponding to the nth sub-PMI. n For the amplitude or power information corresponding to the nth sub-PMI, θ n For the phase information corresponding to the nth sub-PMI, n = 1, 2, ... N, when the CSI does not include the amplitude or power information corresponding to the nth sub-PMI, the p n It is 0 or 1; when the CSI does not include the phase information corresponding to the nth sub-PMI, the θ n It can be 0 or 1.

[0383] In this embodiment, the terminal selects at least one CMR group from multiple Channel Measurement Resources (CMR) subsets, and the CSI fed back to the network-side device includes CRI, sub-PMI, phase information, and amplitude or power information, thereby realizing the correlation of channel measurements between multiple TRPs and the terminal and achieving coherent joint transmission of multiple TRPs.

[0384] The embodiment of the present application further provides a network side device, comprising a processor and a communication interface, the communication interface is used for sending channel state information reference signal (CSI-RS) configuration information to a terminal; wherein the CSI-RS configuration information is used for indicating an association relationship between a CSI-RS port and multiple groups of quasi co-located (QCL) reference sources. Alternatively, the communication interface is used for sending channel state information reference signal (CSI-RS) configuration information and channel state information (CSI) report configuration information to a terminal; and the communication interface is further used for receiving channel state information (CSI) fed back by the terminal. The network side device embodiment corresponds to the network side device method embodiment described above, and each implementation process and implementation manner of the method embodiment can be applied to the network side device embodiment and achieve the same technical effects.

[0385] Specifically, the embodiment of the present application further provides a network side device. As shown in the figure, Figure 12 The network device 1200 comprises an antenna 1201, a radio frequency device 1202, and a baseband device 1203. The antenna 1201 is connected to the radio frequency device 1202. In the uplink direction, the radio frequency device 1202 receives information through the antenna 1201 and sends the received information to the baseband device 1203 for processing. In the downlink direction, the baseband device 1203 processes the information to be sent and sends it to the radio frequency device 1202. The radio frequency device 1202 processes the received information and sends it out through the antenna 1201.

[0386] The above frequency band processing device can be located in the baseband device 1203. The method executed by the network side device in the above embodiment can be implemented in the baseband device 1203, which comprises a processor 1204 and a memory 1205.

[0387] The baseband device 1203 may, for example, comprise at least one baseband board, which is provided with a plurality of chips, as shown in the figure, Figure 12 One of the chips is, for example, the processor 1204, which is connected to the memory 1205 to call the program in the memory 1205 and execute the network device operation shown in the above method embodiment.

[0388] The baseband device 1203 may, for example, comprise at least one baseband board, which is provided with a plurality of chips, as shown in the figure,

[0389] Specifically, the network side device of the embodiment of the present application further comprises instructions or programs stored in the memory 1205 and executable on the processor 1204, and the processor 1204 calls the instructions or programs in the memory 1205 to execute Figure 7 or Figure 9The method executed by each module shown and the same technical effect are achieved, and thus details are not described herein.

[0390] The application also provides a readable storage medium, which stores a program or instructions, and the program or instructions are executed by a processor to implement each process of the CSI-RS configuration method or the CSI feedback method, and the same technical effect can be achieved. To avoid repetition, details are not described herein.

[0391] The processor is the processor in the terminal in the above embodiments. The readable storage medium includes a computer readable storage medium, such as a computer read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0392] The application further provides a chip, which includes a processor and a communication interface. The communication interface is coupled with the processor. The processor is configured to run a program or instructions to implement each process of the CSI-RS configuration method or the CSI feedback method, and the same technical effect can be achieved. To avoid repetition, details are not described herein.

[0393] It should be understood that the chip mentioned in the application can also be referred to as a system chip, a system chip, a chip system or a system on chip, etc.

[0394] It should be noted that in this document, the term "comprising" or "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such a process, method, article or device. Without more limitations, the element defined by the statement "including a" does not exclude the presence of additional identical elements in the process, method, article or device including the element. In addition, it should be pointed out that the scope of the method and device in the application is not limited to the order of functions shown or discussed, but can also include functions performed in a substantially simultaneous manner or in the opposite order, for example, the described method can be performed in an order different from that described, and various steps can also be added, omitted or combined. In addition, the features described with reference to some examples can be combined in other examples.

[0395] Through the above description of the embodiments, those skilled in the art can clearly understand that the above-mentioned example methods can be realized by means of software and a necessary general hardware platform, and of course, can also be realized by hardware, but in many cases, the former is a better embodiment. Based on such understanding, the technical solutions of the present application can be embodied in the form of a computer software product in essence or in the form of a part that contributes to the prior art, which is stored in a storage medium (such as a ROM / RAM, a magnetic disc, an optical disc), and includes a plurality of instructions for causing a terminal (which can be a mobile phone, a computer, a server, or a network device, etc.) to execute the methods described in the various embodiments of the present application.

[0396] The embodiments of the present application are described above in combination with the drawings, but the present application is not limited to the above-mentioned specific embodiments, and the above-mentioned specific embodiments are only illustrative and not restrictive. Those skilled in the art can make many forms under the inspiration of the present application without departing from the scope of the present application and the scope protected by the claims.

Claims

1. A CSI-RS configuration method, characterized in that, The method comprises: a terminal receiving channel state information reference signal (CSI-RS) configuration information; wherein the CSI-RS configuration information is used to indicate the association relationship between a CSI-RS port and multiple groups of quasi co-location (QCL) reference sources; the CSI-RS configuration information comprises at least one CSI-RS resource, wherein one CSI-RS resource comprises at least one CSI-RS port; wherein each CSI-RS port is associated with multiple first transmission configuration indication (TCI) states or multiple groups of QCL reference sources, and one first TCI state corresponds to one group of QCL reference sources; or each CSI-RS port is associated with one second TCI state, wherein the second TCI state corresponds to multiple groups of QCL reference sources; the CSI-RS configuration information is used for coherent joint transmission, and the channel state information (CSI) feedback based on the CSI-RS configuration information is non-precoding matrix indication (non-PMI) based CSI feedback.

2. The CSI-RS configuration method of claim 1, wherein, The CSI-RS resource further satisfies at least one of the following conditions: each group of QCL reference sources comprises at least one QCL reference source; in the case where each CSI-RS port is associated with multiple groups of QCL reference sources, the number and types of QCL reference sources contained in each group of QCL reference sources in the multiple groups of QCL reference sources are the same; in the case where each CSI-RS port is associated with multiple groups of QCL reference sources, the number and / or types of QCL reference sources contained in each group of QCL reference sources in the multiple groups of QCL reference sources are different; in the case where each group of QCL reference sources comprises two QCL reference sources, one of the two QCL reference sources is of the type QCL-TypeD; a channel state information interference measurement (CSI-IM) resource corresponding to the CSI-RS resource has the same QCL assumption as the CSI-RS resource.

3. The CSI-RS configuration method of claim 1, wherein, The CSI-RS resource comprises a CSI-RS resource for channel measurement and a CSI-RS resource for interference measurement.

4. A CSI-RS configuration method, comprising: The method comprises: a network-side device sending channel state information reference signal (CSI-RS) configuration information to a terminal; wherein the CSI-RS configuration information is used to indicate the association relationship between a CSI-RS port and multiple groups of quasi co-location (QCL) reference sources; the CSI-RS configuration information comprises at least one CSI-RS resource, wherein one CSI-RS resource comprises at least one CSI-RS port; wherein each CSI-RS port is associated with multiple first transmission configuration indication (TCI) states or multiple groups of QCL reference sources, and one first TCI state corresponds to one group of QCL reference sources; or each CSI-RS port is associated with one second TCI state, wherein the second TCI state corresponds to multiple groups of QCL reference sources; the CSI-RS configuration information is used for coherent joint transmission, and the channel state information (CSI) feedback based on the CSI-RS configuration information is non-precoding matrix indication (non-PMI) based CSI feedback.

5. The CSI-RS configuration method of claim 4, wherein, The CSI-RS resource further satisfies at least one of the following conditions: Each of the groups of QCL reference sources comprises at least one QCL reference source; In a case where each of the CSI-RS ports is associated with multiple groups of QCL reference sources, each of the groups of QCL reference sources comprises QCL reference sources of the same number and type; In a case where each of the CSI-RS ports is associated with multiple groups of QCL reference sources, each of the groups of QCL reference sources comprises QCL reference sources of different number and / or type; In a case where each of the groups of QCL reference sources comprises two QCL reference sources, one of the two QCL reference sources is of the type of QCL-TypeD; A channel state information interference measurement, CSI-IM, resource corresponding to the CSI-RS resource has the same QCL assumption as the CSI-RS resource.

6. The CSI-RS configuration method of claim 4, wherein, The CSI-RS resource comprises a CSI-RS resource for channel measurement and a CSI-RS resource for interference measurement.

7. A CSI-RS configuration device, characterized in that, Comprise: a first receiving unit configured to receive channel state information reference signal, CSI-RS, configuration information; The CSI-RS configuration information is used to indicate an association relationship between a CSI-RS port and multiple groups of quasi co-location, QCL, reference sources; The CSI-RS configuration information comprises at least one CSI-RS resource, wherein one CSI-RS resource comprises at least one CSI-RS port; Each of the CSI-RS ports is associated with multiple first transmission configuration indication, TCI, states or multiple groups of QCL reference sources, and one of the first TCI states corresponds to one group of QCL reference sources; Or, each of the CSI-RS ports is associated with one second TCI state, and the second TCI state corresponds to multiple groups of QCL reference sources; The CSI-RS configuration information is used for coherent joint transmission, and channel state information, CSI, feedback based on the CSI-RS configuration information is non-precoding matrix indication, non-PMI, based CSI feedback.

8. A CSI-RS configuration device, characterized in that, Comprise: a first sending unit configured to send channel state information reference signal, CSI-RS, configuration information to a terminal; The CSI-RS configuration information is used to indicate an association relationship between a CSI-RS port and multiple groups of quasi co-location, QCL, reference sources; The CSI-RS configuration information comprises at least one CSI-RS resource, wherein one CSI-RS resource comprises at least one CSI-RS port; Each of the CSI-RS ports is associated with multiple first transmission configuration indication, TCI, states or multiple groups of QCL reference sources, and one of the first TCI states corresponds to one group of QCL reference sources; Or, each of the CSI-RS ports is associated with one second TCI state, and the second TCI state corresponds to multiple groups of QCL reference sources; The CSI-RS configuration information is used for coherent joint transmission, and channel state information, CSI, feedback based on the CSI-RS configuration information is non-precoding matrix indication, non-PMI, based CSI feedback.

9. A terminal, characterized by comprising: A computer program product, comprising a computer readable storage medium having stored thereon instructions that, when executed by a processor, perform the steps of the CSI-RS configuration method according to any one of claims 1 to 3, or perform the steps of the CSI-RS configuration method according to any one of claims 4 to 6.

10. A network-side device, characterized by comprising: A computer program product, comprising a computer readable storage medium having stored thereon instructions that, when executed by a processor, perform the steps of the CSI-RS configuration method according to any one of claims 1 to 3, or perform the steps of the CSI-RS configuration method according to any one of claims 4 to 6.

11. A readable storage medium, characterized by, A computer program product, comprising a computer readable storage medium having stored thereon instructions that, when executed by a processor, perform the steps of the CSI-RS configuration method according to any one of claims 1 to 3, or perform the steps of the CSI-RS configuration method according to any one of claims 4 to 6.

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