CN115603872A

CN115603872A - CSI-RS configuration method, CSI feedback method, device and equipment

Info

Publication number: CN115603872A
Application number: CN202110723390.5A
Authority: CN
Inventors: 宋扬; 塔玛拉卡·拉盖施
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2021-06-28
Filing date: 2021-06-28
Publication date: 2023-01-13
Also published as: WO2023274120A1

Abstract

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

Description

CSI-RS configuration method, CSI feedback method, device and equipment

Technical Field

The 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

Existing multiple Transmission and Reception Point (TRP) Transmission is a Non-Coherent Joint Transmission mode (NCJT), and Channel State Information Reference Signal (CSI-RS) configuration and Channel State Information (CSI) feedback of multiple TRPs are enhanced in the related art.

In the related art, a CSI-RS Resource is divided into multiple Channel Measurement Resource (CMR) subsets or CSI-RS Resource subsets, and a User Equipment (UE) may measure at least one pair of CMRs according to a configuration to calculate CSI of NCJT, where the pair of CMRs are from different CMR subsets. When CSI is fed back, UE can report CSI of one NCJT and CSI of X =0,1,2 single TRPs according to configuration, or report the optimal CSI of the NCJT and the single TRP. Since the enhanced information does not contain the relationship between a plurality of TRPs, it cannot be applied to Coherent Joint Transmission (CJT).

Disclosure of Invention

The embodiment of the application provides a CSI-RS configuration method, a CSI feedback method, a device and equipment, and can solve the problems of CSI-RS configuration and CSI feedback in a multi-TRP coherent joint transmission mode.

In a first aspect, a CSI-RS configuration method is provided, where the method includes:

the terminal receives channel state information reference signal CSI-RS configuration information;

the CSI-RS configuration information is used for indicating the incidence relation between CSI-RS ports and multiple groups of quasi co-located QCL reference sources.

In a second aspect, a CSI-RS configuration method is provided, which includes:

the method comprises the steps that network side equipment sends channel state information reference signal CSI-RS configuration information to a terminal;

the CSI-RS configuration information is used for indicating the association relation between the CSI-RS ports and the multiple groups of quasi co-located QCL reference sources.

In a third aspect, a CSI feedback method is provided, where the method includes:

a terminal receives channel state information reference signal (CSI-RS) configuration information and Channel State Information (CSI) report configuration information;

the terminal measures according to the CSI-RS configuration information, and at least one CMR group is selected from a plurality of CMR subsets of channel measurement resources to obtain CSI;

and the terminal feeds back the CSI to network side equipment according to the CSI report configuration information.

In a fourth aspect, a CSI feedback method is provided, which includes:

the method comprises the steps that network side equipment sends channel state information reference signal CSI-RS configuration information and channel state information CSI report configuration information to a terminal;

and the network side equipment receives the channel state information CSI fed back by the terminal.

In a fifth aspect, an apparatus for CSI-RS configuration is provided, including:

a first receiving unit, configured to receive channel state information reference signal CSI-RS configuration information;

In a sixth aspect, an apparatus for CSI-RS configuration is provided, including:

the first sending unit is used for sending channel state information reference signal CSI-RS configuration information to the terminal;

In a seventh aspect, a CSI feedback apparatus is provided, including:

a second receiving unit, configured to receive CSI-RS configuration information and CSI report configuration information;

the measurement unit is used for measuring according to the CSI-RS configuration information and selecting at least one group of CMRs from a plurality of CMR subsets to obtain CSI;

and the feedback unit is used for feeding back the CSI to network side equipment according to the CSI report configuration information.

In an eighth aspect, a CSI feedback apparatus is provided, including:

a second transmitting unit, configured to transmit channel state information reference signal CSI-RS configuration information and channel state information CSI report configuration information to the terminal;

and a third receiving unit, configured to receive channel state information CSI fed back by the terminal.

In a ninth aspect, a terminal is provided, which includes a processor, a memory, and a program or instructions stored on the memory and executable on the processor, the program or instructions, when executed by the processor, implementing the steps of the CSI-RS configuration method according to the first aspect or implementing the steps of the CSI feedback method according to the third aspect.

In a tenth aspect, a terminal is provided, which includes a processor and a communication interface, where the communication interface is configured to receive CSI-RS configuration information; the CSI-RS configuration information is used for indicating the association relation between the CSI-RS ports and the multiple groups of quasi co-located QCL reference sources. Or, the communication interface is configured to receive 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, and selecting at least one CMR group from a plurality of CMR subsets of channel measurement resources to obtain CSI; the communication interface is further configured to feed back the CSI to a network side device according to the CSI report configuration information.

In an eleventh aspect, a network-side device is provided, which includes a processor, a memory, and a program or instructions stored on the memory and executable on the processor, and when executed by the processor, the program or instructions implement the steps of the CSI-RS configuration method according to the second aspect, or implement the steps of the CSI feedback method according to the fourth aspect.

In a twelfth aspect, a network side device is provided, which includes a processor and a communication interface, where the communication interface is configured to send channel state information reference signal, CSI-RS, configuration information to a terminal; the CSI-RS configuration information is used for indicating the association relation between the CSI-RS ports and the multiple groups of quasi co-located QCL reference sources. Or, the communication interface is configured to send channel state information reference signal CSI-RS configuration information and channel state information CSI report configuration information to the terminal; the communication interface is further used for receiving the channel state information CSI fed back by the terminal.

In a thirteenth aspect, a readable storage medium is provided, on which a program or instructions are stored, which when executed by a processor, implement the steps of the CSI-RS configuration method according to the first aspect, or implement the steps of the CSI-RS configuration method according to the second aspect, or implement the steps of the CSI feedback method according to the third aspect, or implement the steps of the CSI feedback method according to the fourth aspect.

In a fourteenth aspect, a chip is provided, the chip comprising a processor and a communication interface, the communication interface being coupled to the processor, the processor being configured to run a program or instructions 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.

In a fifteenth aspect, a computer program/program product is provided, which is stored in a non-transitory storage medium and which 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.

In the embodiment of the application, the terminal realizes the association of a plurality of TRPs to the terminal through receiving the CSI-RS configuration information which is sent by the network side equipment and used for indicating the association relationship between the CSI-RS port and the plurality of groups of QCLs, and is applicable to a coherent joint transmission scene of the plurality of TRPs.

Drawings

Fig. 1 is a block diagram of a wireless communication system to which embodiments of the present application are applicable;

fig. 2 is a flowchart illustrating a CSI-RS configuration method according to an embodiment of the present application;

fig. 3 is a second schematic flowchart of a CSI-RS configuration method according to an embodiment of the present application;

fig. 4 is a schematic flowchart of a CSI feedback method according to an embodiment of the present application;

fig. 5 is a second flowchart of a CSI feedback method according to an embodiment of the present application;

fig. 6 is a schematic structural diagram of a CSI-RS configuration apparatus according to an embodiment of the present application;

fig. 7 is a second schematic structural diagram of a CSI-RS configuration apparatus according to an embodiment of the present application;

fig. 8 is a schematic structural diagram of a CSI feedback apparatus according to an embodiment of the present application;

fig. 9 is a second schematic structural diagram of a CSI feedback apparatus according to an embodiment of the present application;

fig. 10 is a schematic structural diagram of a communication device according to an embodiment of the present application;

fig. 11 is a schematic hardware structure diagram of a terminal implementing the embodiment of the present application;

fig. 12 is a schematic structural diagram of a network device according to an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be described below clearly with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments that can be derived from the embodiments given herein by a person of ordinary skill in the art are intended to be within the scope of the present disclosure.

The terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing 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 application are capable of operation in other sequences than those illustrated or otherwise described herein, and that the terms "first" and "second" are generally used herein in a generic sense to distinguish one element from another, and not necessarily from another element, such as a first element which may be one or more than one. In addition, "and/or" in the specification and the claims means at least one of connected objects, and a character "/" generally means that a preceding and succeeding related objects are in an "or" relationship.

It is noted that the techniques described in the embodiments of the present application are not limited to Long Term Evolution (LTE)/LTE-Advanced (LTE-a) systems, but may also be used in 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 term "system" in the embodiments of the present application"and" network "are often used interchangeably, and the described techniques may be used for both the above-mentioned systems and radio technologies, as well as for other systems and radio technologies. The following description describes a New Radio (NR) system for purposes of example, and NR terminology is used in much of the description below, but the techniques may also be applied to applications other than NR system applications, such as generation 6 (6) ^th Generation, 6G) communication system.

Fig. 1 is a block diagram showing a wireless communication system to which an embodiment of the present application is applicable. The wireless communication system includes a terminal 11 and a network-side device 12. Wherein, the terminal 11 may also be called as a terminal Device or a User Equipment (UE), the terminal 11 may be a Mobile phone, a Tablet Personal Computer (Tablet Personal Computer), a Laptop Computer (Laptop Computer) or a notebook Computer, a Personal Digital Assistant (PDA), a palmtop Computer, a netbook, a super-Mobile Personal Computer (UMPC), a Mobile Internet Device (MID), a Wearable Device (Wearable Device) or a vehicle-mounted Device (VUE), a pedestrian terminal (PUE), and other terminal side devices, the Wearable Device includes: smart watches, bracelets, earphones, glasses, and the like. It should be noted that the embodiment of the present application does not limit the specific type of the terminal 11. The network-side device 12 may be a Base Station or a core network, where the Base Station may be referred to as a node B, an evolved node B, an access Point, a Base Transceiver Station (BTS), a radio Base Station, a radio Transceiver, a Basic Service Set (BSS), an Extended Service Set (ESS), a node B, an evolved node B (eNB), a home node B, a WLAN access Point, a WiFi node, a Transmit Receiving Point (TRP), or some other suitable terminology in the field, as long as the same technical effect is achieved, the Base Station is not limited to a specific technical vocabulary, and it should be noted that, in the embodiment of the present application, only the Base Station in the NR system is taken as an example, but a specific type of the Base Station is not limited.

The CSI-RS configuration method, the CSI feedback method, the apparatus and the device provided in the embodiments of the present application are described in detail below with reference to the accompanying drawings.

Fig. 2 is a flowchart illustrating a CSI-RS configuration method according to an embodiment of the present application. As shown in fig. 2, the method comprises the steps of:

step 200, a terminal receives channel state information reference signal CSI-RS configuration information;

The Quasi-Co-Location (QCL) means that the average delay, delay spread, doppler frequency shift, doppler spread, spatial receiving parameters, and the like of a channel experienced by a symbol on one antenna port can be inferred through another antenna port. The following 4 QCL relationships of different types are designed in a New Radio (NR) for coping with different transmission scenarios:

1) QCL-TypeA, { doppler frequency offset, doppler spread, average delay, delay spread };

2) QCL-TypeB, { doppler shift, doppler spread };

3) QCL-TypeC, { doppler frequency offset, average time delay };

4) QCL-type, { space reception parameter }.

In the embodiment of the application, the CSI-RS configuration information indicates an association relationship between the CSI-RS port and multiple sets of QCL reference sources, that is, indicates that average delay, delay spread, doppler frequency shift, doppler spread, spatial receiving parameters, and the like of a channel experienced by a symbol on the CSI-RS port can be inferred through antenna ports of the multiple sets of QCL reference sources, so that association of channel measurement between multiple TRPs and a terminal is realized.

Optionally, the CSI-RS configuration information includes at least one CSI-RS resource, where one CSI-RS resource includes at least one CSI-RS port.

Optionally, each CSI-RS port is associated with a plurality of first Transmission Configuration Indicator (TCI) states or a plurality of sets of QCL reference sources, wherein one of the first Transmission Configuration Indicator (TCI) states corresponds to one set of QCL reference sources, and the plurality of first TCI states corresponds to the plurality of sets of QCL reference sources.

Wherein the TCI status is used to indicate QCL reference relationships between reference signals.

Optionally, each CSI-RS port is associated with a second TCI state, wherein the second TCI state corresponds to multiple sets of QCL reference sources. I.e., one second TCI state, corresponds to multiple sets of QCL reference sources, such that each of the CSI-RS ports is associated with multiple sets of QCL reference sources.

Optionally, the CSI-RS resource further satisfies at least one of:

each set of QCL reference sources includes at least one QCL reference source;

in the case that multiple sets of QCL reference sources are associated with each CSI-RS port, each of the multiple sets of QCL reference sources contains the same number and type of QCL reference sources;

where multiple sets of QCL reference sources are associated with each CSI-RS port, the reference sources of the multiple sets of QCL reference sources comprise different numbers and/or different types of QCL reference sources;

in the event that each set of QCL reference sources includes two QCL reference sources, one of the two QCL reference sources is of a QCL-TypeD type;

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.

In one embodiment, in a case that each CSI-RS port is associated with multiple sets of QCL reference sources, the number and types of QCL reference sources included in each set of QCL reference sources in the multiple sets of QCL reference sources are the same, for example, one CSI-RS port configured for the terminal by the network-side device is associated with a first QCL reference source set, a second QCL reference source set and a third QCL reference source set, the number of QCL reference sources included in the first QCL reference source set is 2, and the types are QCL-type a and QCL-type d, respectively; then, the second set of QCL reference sources includes QCL reference sources that are also 2 in number, also of the type QCL-TypeA, QCL-TypeD; the third QCL reference source group also contains 2 QCL reference sources, also of the type QCL-TypeA, QCL-TypeD; namely, the first QCL reference source group, the second QCL reference source group and the third QCL reference source group all contain the same number and type of QCL reference sources.

In one embodiment, where multiple sets of QCL reference sources are associated with each CSI-RS port, each of the multiple sets of QCL reference sources may include a different number and/or type of QCL reference sources. For example, a CSI-RS port configured by the network side device for the terminal associates a first QCL reference source group and a second QCL reference source group, where the number of QCL reference sources included in the first QCL reference source group is 2, and the types of QCL reference sources are QCL-type a and QCL-type d, respectively; the second QCL reference source group contains QCL reference sources of a number of 1, type QCL-type; alternatively, the second set of QCL reference sources includes QCL reference sources of 2 number and QCL-TypeC and QCL-TypeD types, respectively.

In one embodiment, where each of the sets of QCL reference sources includes two QCL reference sources, one of the two QCL reference sources is of a type determined to be QCL-TypeD.

Optionally, the CSI-RS resources include CSI-RS resources for channel measurement and CSI-RS resources for interference measurement.

Optionally, the CSI-RS configuration information is used for Coherent Joint Transmission (CJT), and the CSI feedback based on the CSI-RS configuration information is CSI feedback based on a non-precoding matrix indicator (non-PMI).

It can be understood that, in a scenario configured to indicate CSI feedback of a non-PMI based on a non-precoding matrix and a coherent joint transmission mode, a network side device obtains CSI from a terminal to a plurality of TRPs through an uplink Sounding Reference Signal (SRS) sent by the terminal, and if there is reciprocity between uplink and downlink channels, the network side device may calculate a precoding matrix of the plurality of TRPs suitable for the terminal according to the CSI from the terminal to the plurality of TRPs. Through the precoding, the terminal can obtain an equivalent Channel from the plurality of TRPs precoded by the network side equipment to the terminal according to measurement, estimate corresponding other CSI information and feed back the CSI information to the network side equipment through a CSI report, wherein the other CSI information comprises a selected port indication, a Rank Indication (RI), a Channel Quality Indication (CQI) and the like. And the network side equipment sends the CSI-RS configuration information to the terminal, wherein the CSI-RS configuration information indicates the incidence relation between the CSI-RS port and the multiple groups of QCL reference sources, contains the relation of channel measurement between the multiple TRPs and the terminal, and is suitable for coherent joint transmission.

The CSI feedback method based on the non-PMI may be consistent with the prior art, for example, when the CSI feedback amount reporting qantity is configured as "cri-RI-CQI", the UE feeds back the RI and the CQI, and may determine the CSI-RS port corresponding to the channel measurement of the RI according to a port indication (non-PMI-porting) or a default port order.

The CSI-RS configuration method provided by the embodiment of the application realizes the association of channel measurement between a plurality of TRPs and a terminal by receiving the CSI-RS configuration information which is sent by network side equipment and used for indicating the association relationship between a CSI-RS port and a plurality of groups of QCL reference sources, and is applicable to a coherent joint transmission scene of the plurality of TRPs.

Fig. 3 is a second flowchart of a CSI-RS configuration method according to an embodiment of the present application. As shown in fig. 3, the method comprises the steps of:

step 300, the network side equipment sends channel state information reference signal CSI-RS configuration information to the terminal;

Optionally, the CSI-RS configuration information includes at least one CSI-RS resource, where one CSI-RS resource includes at least one CSI-RS port;

wherein each of the CSI-RS ports is associated with a plurality of first Transmission Configuration Indicators (TCI) status or a plurality of sets of QCL reference sources, and one of the first Transmission Configuration Indicators (TCI) status corresponds to one set of QCL reference sources;

or each CSI-RS port is associated with a second TCI state, wherein the second TCI states correspond to multiple groups of QCL reference sources.

Optionally, the CSI-RS resource further satisfies at least one of:

each set of QCL reference sources includes at least one QCL reference source;

in the case that multiple sets of QCL reference sources are associated with each CSI-RS port, the number and type of QCL reference sources contained in each set of reference sources in the multiple sets of QCL are the same;

in the case that multiple sets of QCL reference sources are associated with each CSI-RS port, each of the multiple sets of QCL reference sources comprises different numbers and/or different types of QCL reference sources;

the CSI-IM resource corresponding to the CSI-RS resource has the same QCL assumption as the CSI-RS resource.

Optionally, the CSI-IM resource corresponding to the CSI-RS resource has the same QCL association as the CSI-RS resource.

Optionally, the CSI-RS configuration information is used for coherent joint transmission, and the CSI feedback based on the channel state information CSI of the CSI-RS configuration information is CSI feedback based on a non-precoding matrix indicator non-PMI.

It should be noted that, the CSI-RS configuration method provided in the embodiment of the present application uses a network side device as an execution main body, and belongs to the same inventive concept as the CSI-RS configuration method shown in fig. 2 that uses a terminal as an execution main body, and therefore, for understanding the CSI-RS configuration method in the embodiment of the present application that uses a network side device as an execution main body, reference may be made to the description in the CSI-RS configuration method embodiment that uses a terminal as an execution main body, and details are not repeated here.

According to the CSI-RS configuration method provided by the embodiment of the application, the network side equipment sends the CSI-RS configuration information used for indicating the association relation between the CSI-RS port and the multiple groups of QCL reference sources to the terminal, the association of channel measurement between the multiple TRPs and the terminal is realized, and the method is applicable to the coherent joint transmission scene of the multiple TRPs.

Fig. 4 is a schematic flowchart of a CSI feedback method provided in an embodiment of the present application, and as shown in fig. 4, the method includes the following steps:

step 400, the terminal receives channel state information reference signal CSI-RS configuration information and channel state information CSI report configuration information;

and the terminal receives the CSI-RS configuration information and the CSI report configuration information sent by the network side equipment.

Wherein the CSI-RS configuration information is used to indicate a plurality of CMR subsets.

The CSI report configuration information is used to indicate how to report CSI.

Step 401, the terminal measures according to the CSI-RS configuration information, and selects at least one CMR group from a plurality of CMR subsets of channel measurement resources to obtain CSI;

in one embodiment, the terminal selects a CMR group from a plurality of 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.

In one embodiment, a terminal selects multiple CMR groups from multiple CMR subsets, where each CMR included in one CMR group belongs to a different CMR subset, each CMR included in one CMR group corresponds to a different TRP, and the number of CMRs included in each CMR group in the multiple CMR groups is the same or different.

In the embodiment of the application, the terminal selects at least one CMR group from a plurality of CMR subsets of channel measurement resources, and coherent joint transmission of multiple TRPs can be realized.

And step 402, the terminal feeds back the CSI to network side equipment according to the CSI report configuration information.

Optionally, the CSI comprises one of:

one CSI corresponding to one CMR group;

one CSI corresponding to a plurality of CMR groups;

a plurality of CSI corresponding to the CMR groups, wherein one CMR group corresponds to one CSI;

and the CMRs in one CMR group belong to different CMR subsets, and the quantity of the CMRs in each CMR group in the plurality of CMR groups is the same or different.

In an embodiment, a terminal selects one CMR group from a plurality of CMR subsets to obtain CSI, and feeds back a CSI corresponding to the CMR group to a network side device, so as to implement CJT transmission of TRP in the group, and feeds back a CSI including a CSI reference signal Resource Indicator (CRI), a Precoding Matrix Indicator (PMI), a Rank Indicator (RI), a Channel Quality Indicator (CQI), and the like.

In one implementation, a terminal selects multiple CMR groups from multiple CMR subsets to obtain CSI, the number of CMRs in each of the multiple CMR groups is the same or different, the terminal feeds back a CSI corresponding to the multiple CMR groups to a network side device, and mixed transmission of CJT and NCJT can be achieved, that is, TRP in each CMR group is transmitted in CJT, and between groups is transmitted in NCJT, and a CSI is fed back, including CRI, PMI, RI, CQI, and the like

In one embodiment, a terminal selects a plurality of CMR groups from a plurality of CMR subsets to obtain CSI, the number of CMRs in each CMR group in the plurality of CMR groups is the same or different, the terminal feeds back a plurality of CSI corresponding to the plurality of CMR groups to network side equipment, so that reporting of a plurality of possible CJT CSI can be achieved, and the network side equipment selects an optimal scheduling result.

For example, the network side device configures 6 CMR subsets to the terminal, selects 2 CMR groups, respectively includes 3 CMRs and 4 CMRs, and feeds back the 2 CMR groups and their CSIs, and the network side device can flexibly schedule the 3 TRPs or 4 TRPs corresponding to the 2 CMR groups to perform service transmission to the terminal according to the situation.

As a special case, the UE selects multiple sets of CMRs in a nested relationship, for example:

group 1: CMR0, CMR1;

group 2: CMR0, CMR1, CMR2;

group 3: CMR0, CMR1, CMR2, CMR3.

Thus, the terminal may report the resource indication (e.g., CRI) corresponding to the CMR0, the CMR1, the CMR2, and the CMR3, and the CSI1 corresponding to the group 1, the CSI2 corresponding to the group 2, and the CSI3 corresponding to the group 3. The CSI1 comprises PMI 0/p 0/theta 0 and PMI 1/p 1/theta 1, group 2 can only additionally feed back PMI2/p 2/theta 2, and group 3 can additionally feed back PMI3/p 3/theta 3. PMIi is a sub-precoding matrix indication corresponding to CMRi, pi is amplitude or power information corresponding to CMRi, and theta i is phase information corresponding to CMRi.

Optionally, the CSI further comprises at least one of:

CSI corresponding to X single TRPs;

y, carrying out non-coherent joint transmission on NCJT CSI corresponding to a plurality of TRPs;

wherein X, Y is an integer of zero or more.

It can be understood that the CSI fed back by the terminal to the network side device may be the above-mentioned coherent joint transmission CJT CSI corresponding to multiple TRPs, that is, one CSI corresponding to one CMR group, one CSI corresponding to multiple CMR groups, or multiple CSIs corresponding to multiple CMR groups, and may further include: and the CSI corresponding to X single TRPs and the NCJT CSI corresponding to Y multiple TRPs are transmitted in an incoherent and combined mode.

Of these, X, Y are configurable.

According to the embodiment of the application, coherent joint transmission can be adopted only in part of TRPs (namely, a plurality of TRPs corresponding to one CMR group) in the plurality of TRPs, and a mixed transmission mode of coherent joint transmission and non-coherent joint transmission can be adopted only between the plurality of partial TRPs (namely, between the TRPs corresponding to the plurality of CMR groups) under the condition of non-coherent joint transmission, so that the applicability and flexibility of CSI report are improved.

Optionally, the CSI corresponding to the CMR group includes:

the CSI reference signal resource of the CMR group indicates CRI or N CRIs corresponding to N CMRs contained in the CMR group;

n sub-precoding matrix indicator PMIs;

phase information corresponding to the M1 sub PMIs;

amplitude or power information corresponding to the M2 sub-PMIs;

wherein each sub PMI corresponds to one CMR; n is the number of CMRs contained in each CMR group; m1 and M2 are both integers of 0 or more and N or less.

It is understood that the CSI for one CMR group includes the following: CRI, PMI, phase information, amplitude or power information.

Wherein, the CSI reference signal resource indication CRI of the CMR group refers to a CRI corresponding to the CMR group.

And reporting N CRIs, wherein the N CRIs correspond to the N CMRs in the CMR group, namely each CMR in the CMR group corresponds to one CRI.

M1, M2 may be preset, or configured by the network side, or autonomously determined by the terminal according to the size of the resource (PUCCH or PUSCH) of the CSI report. The terminal autonomously determines according to the size of the resource (PUCCH or PUSCH) of the CSI report, that is, when the size of the resource (PUCCH or PUSCH) of the CSI report cannot send phase information corresponding to the N sub-PMIs or amplitude or power information corresponding to the N sub-PMIs, the terminal may discard part of CSI content by adjusting M1 or M2 and does not report the CSI content. The sub-PMIs that do not feed back phase information or amplitude or power information may then be transmitted using NCJT.

Wherein the amplitude or power information represents amplitude information or power information.

Further, the amplitude or power information corresponding to the M2 sub-PMIs includes at least one of:

m2-1 amplitude or power quantized values, wherein the largest amplitude or power quantized value of the M2 amplitude or power quantized values is 1 and is not fed back;

the corresponding relation between M2 amplitude or power quantization values and the N sub PMIs.

Wherein the M2 quantized amplitude or power values are quantized values of the largest M2 amplitude or power values among the amplitude or power values corresponding to the N sub-PMIs.

Optionally, the larger the amplitude or power value is, the higher or lower the quantization precision of the corresponding amplitude or power quantization value is; the quantization precision of the amplitude or power quantization value corresponding to different CMRs or transmission reception points TRP is preset or configurable.

Alternatively, the quantization of the amplitude or the power may also be an equal amplitude or equal power quantization.

Further, the phase information corresponding to the M1 sub-PMIs includes at least one of:

m1 phase quantization values;

the corresponding relation between M1 phase quantization values and N sub PMIs;

wherein, the M1 phase quantization values are phase quantization values corresponding to M1 sub-PMIs with the largest amplitude or power value. That is, the M1 phase quantization values are quantization values of phase values corresponding to M1 sub-PMIs having the largest amplitude or power value.

Optionally, the larger the amplitude or power value is, the higher the quantization precision of the corresponding phase quantization value is; the quantization precision of the phase quantization values corresponding to different CMRs or transmission reception points TRP is preset or configurable.

Alternatively, the quantization of the phase may also be performed in an equidistant quantization manner.

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

Example 1: one CMR group comprises N CMRs, N CRIs corresponding to the N CMRs are reported, the CRIs are reported according to the sequence from large to small of the amplitude or power of the CMRs to be measured, and the reported N sub PMIs correspond to the N CMRs corresponding to the sequence indicated by the N CRIs. In this way, the terminal reports that the amplitude or power quantized value corresponding to M2 sub-PMIs is the amplitude or power quantized value of the sub-PMIs corresponding to the first M2 CRIs, and the terminal reports that the phase quantized value corresponding to M1 sub-PMIs is the phase quantized value of the sub-PMIs corresponding to the first M1 CRIs. At this time, the corresponding relation between the amplitude or power quantization value corresponding to the M2 sub-PMIs and the phase quantization value corresponding to the M1 sub-PMIs and the N sub-PMIs is clear, and reporting in CSI is not needed.

Example 2: one CMR group comprises N CMRs, one CRI is reported to indicate the CMR group, the amplitude or power size arrangement of the N CMRs in the CMR group may not have a specific sequence, and the reported N sub PMIs correspond to the N CMRs. At this time, in addition to reporting the amplitude or power quantized value corresponding to the M2 sub-PMIs and the phase quantized value corresponding to the M1 sub-PMIs, the terminal also needs to report the correspondence between the amplitude or power quantized value corresponding to the M2 sub-PMIs and the N sub-PMIs and the correspondence between the phase quantized value corresponding to the M1 sub-PMIs and the N sub-PMIs in the CSI. For example, N bitmap bits are used to indicate the corresponding relationship, where an nth bitmap bit is 1 to indicate that an nth sub-PMI has a corresponding amplitude or power quantization value/phase quantization value, and 0 indicates that the nth sub-PMI has no corresponding amplitude or power quantization value/phase quantization value.

In the CSI feedback method provided in the embodiment of the present application, the terminal selects at least one CMR group from the CMR subsets of the multiple channel measurement resources, and the CSI fed back to the network side device includes the CRI, the sub-PMI, the phase information, and the amplitude or power information, thereby implementing association of channel measurement between multiple TRPs and the terminal, and implementing coherent joint transmission of multiple TRPs.

Optionally, before the terminal feeds back the CSI to the network side device according to the CSI report configuration information, the method further includes:

determining the priority of the N sub PMIs according to the amplitude or power information corresponding to the N sub PMIs;

the terminal feeds back the CSI to the network side equipment according to the CSI report configuration information, and the method comprises the following steps:

and feeding back PMIs corresponding to part of the N sub-PMIs, phase information and amplitude or power information to network side equipment according to the priority of the N sub-PMIs.

Optionally, under the condition that feedback resources are insufficient, that is, the capacity of a feedback channel is limited, the terminal determines the priority of the N sub-PMIs according to amplitude or power information corresponding to the N sub-PMIs, wherein the larger the amplitude or power quantization value is, the higher the priority is, and then according to the priority of the N sub-PMIs, reports the PMI, the phase information, and the amplitude or power information corresponding to the sub-PMI with the higher priority, that is, the sub-PMI with the higher priority realizes CJT transmission, and other sub-PMIs with relatively lower priorities adopt NCJT transmission.

Optionally, the method further comprises:

the terminal calculates a precoding matrix 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 by using the following formula:

W _new ＝[p ₁ θ ₁ W ₁ p ₂ θ ₂ W ₂ … p _N θ _N W _N ]

wherein, W _new As a precoding matrix, W _n Precoding matrix corresponding to the nth sub PMI, p _n Amplitude information or power information corresponding to the nth sub PMI θ _n N =1,2, … N as phase information corresponding to the nth sub-PMI, and 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; the θ is in a case where the CSI does not include phase information corresponding to an nth sub PMI _n Is 0 or 1.

It should be noted that the precoding matrix may be for all transmission layers or for each transmission layer. For all transport layers, W _n Precoding matrix for all transmission layers corresponding to the nth sub-PMI, i.e. all transmission layers use the same p _n 、θ _n (ii) a For each transport layer, W _n The precoding matrix of one transmission layer corresponding to the nth sub-PMI, i.e., all transmission layers may use different p _n 、θ _n At this time, the CSI report needs to include RI W _n 、p _n 、θ _n Obtaining RI W _hew The RI is the number of transmission layers reported by the terminal.

And the terminal calculates to obtain a precoding matrix and determines channel parameters such as RI and CQI according to the precoding matrix to report CSI.

Fig. 5 is a second flowchart of the CSI feedback method according to the embodiment of the present application. As shown in fig. 5, the method comprises the steps of:

500, a network side device sends channel state information reference signal CSI-RS configuration information and channel state information CSI report configuration information to a terminal;

step 501, the network side device receives channel state information CSI fed back by the terminal.

It should be noted that, the CSI feedback method provided in this embodiment of the present application uses a network side device as an execution subject, and belongs to the same inventive concept as the CSI feedback method using a terminal as an execution subject shown in fig. 4, and therefore, for understanding the CSI feedback method using the network side device as an execution subject in this embodiment of the present application, reference may be made to the description in the foregoing CSI feedback method embodiment using the terminal as an execution subject, and details are not repeated here.

Optionally, the CSI comprises one of:

one CSI corresponding to one CMR group;

one CSI corresponding to a plurality of CMR groups;

a plurality of CSI corresponding to a plurality of CMR groups, wherein one CMR group corresponds to one CSI;

and the CMRs in one CMR group belong to different CMR subsets respectively, and the number of CMRs in each CMR group in the plurality of CMR groups is the same or different.

Optionally, the CSI further comprises at least one of:

CSI corresponding to X single TRPs;

wherein X, Y is an integer of zero or more.

Optionally, the CSI corresponding to the CMR group includes:

the CSI reference signal resource corresponding to the CMR group indicates CRI or N CRIs corresponding to N CMRs contained in the CMR group;

n sub-precoding matrix indicator PMIs;

phase information corresponding to the M1 sub PMIs;

amplitude or power information corresponding to the M2 sub-PMIs;

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

the corresponding relation between M2 amplitude or power quantized values and the N sub-PMIs;

wherein, the quantized values of the amplitude or power corresponding to the M2 sub-PMIs are quantized values of M2 maximum amplitude or power values among the amplitude or power values corresponding to the N sub-PMIs.

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

m1 phase quantization values;

the corresponding relation between M1 phase quantization values and N sub PMIs;

wherein, the M1 phase quantization values are phase quantization values corresponding to M1 sub PMIs with the largest amplitude or power value.

According to the CSI feedback method provided by the embodiment of the application, the network side equipment receives the CSI fed back by the terminal, the CSI comprises CRI, sub PMI, phase information and amplitude or power information, and coherent joint transmission of multiple TRPs is realized.

Optionally, the method further comprises:

the network side equipment calculates a precoding matrix 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 by using the following formula:

W _new ＝[p ₁ θ ₁ W ₁ p ₂ θ ₂ W ₂ … p _N θ _N W _N ]

wherein, W _new As a precoding matrix, W _n Precoding matrix, p, corresponding to the nth sub PMI _n Amplitude information or power information corresponding to the nth sub PMI θ _n Phase information corresponding to the nth sub-PMI,n =1,2, … N, and 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; the θ is in a case where the CSI does not include phase information corresponding to an nth sub PMI _n Is 0 or 1.

Optionally, the method further comprises:

determining channel parameters according to the precoding matrix;

wherein the channel parameters include at least one of: the rank of the channel matrix indicates RI and the channel quality indicates CQI.

It can be understood that the network side device calculates a precoding matrix according to the above formula based on the N sub-PMIs in the CSI fed back by the terminal, the phase information corresponding to the M1 sub-PMIs, and the amplitude or power information corresponding to the M2 sub-PMIs, and precodes the transmitted data signal by using the precoding matrix.

Fig. 6 is a schematic structural diagram of a CSI-RS configuration apparatus according to an embodiment of the present application, and as shown in fig. 6, the CSI-RS configuration apparatus 600 includes:

a first receiving unit 610, configured to receive channel state information reference signal CSI-RS configuration information;

In the embodiment of the application, the CSI-RS configuration information indicates the association relationship between the CSI-RS ports and the multiple groups of QCLs, so that the association of the multiple TRPs to the terminal for channel measurement is realized.

Optionally, the CSI-RS resource further satisfies at least one of:

each set of QCL reference sources includes at least one QCL reference source;

under the condition that 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 QCLs are the same;

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 CSI feedback based on a non-precoding matrix indicator (non-PMI).

The CSI-RS configuration apparatus provided in the embodiment of the present application, by receiving CSI-RS configuration information, which is sent by a network side device and used for indicating an association relationship between a CSI-RS port and multiple sets of QCLs, implements association of channel measurement between multiple TRPs and a terminal, and is applicable to a coherent joint transmission scenario of multiple TRPs.

The CSI-RS configuration apparatus in the embodiment of the present application may be an apparatus, an apparatus or an electronic device having an operating system, or a component, an integrated circuit, or a chip in a terminal. The device or the electronic equipment can be a mobile terminal or a non-mobile terminal. For example, the mobile terminal may include, but is not limited to, the above-listed type of terminal 11, and the non-mobile terminal may be a server, a Network Attached Storage (NAS), a Personal Computer (PC), a Television (TV), a teller machine, a kiosk, or the like, and the embodiments of the present application are not limited in particular.

The CSI-RS configuration apparatus provided in the embodiment of the present application can implement each process implemented in the method embodiment of fig. 2, and achieve the same technical effect, and is not described herein again to avoid repetition.

Fig. 7 is a second schematic structural diagram of a CSI-RS configuration apparatus according to an embodiment of the present application, and as shown in fig. 7, the CSI-RS configuration apparatus 700 includes:

a first transmitting unit 710, configured to transmit channel state information reference signal CSI-RS configuration information to a terminal;

Optionally, the CSI-RS resource further satisfies at least one of:

each set of QCL reference sources includes at least one QCL reference source;

The CSI-RS configuration device provided by the embodiment of the application sends the CSI-RS configuration information used for indicating the association relationship between the CSI-RS port and the multiple groups of QCLs to the terminal, realizes the association of channel measurement between the multiple TRPs and the terminal, and is applicable to the coherent joint transmission scene of the multiple TRPs.

The CSI-RS configuration apparatus provided in the embodiment of the present application can implement each process implemented in the method embodiment of fig. 3, and achieve the same technical effect, and is not described herein again to avoid repetition.

It should be noted that, in the CSI feedback method provided in the embodiment of the present application, the execution subject may be a CSI feedback apparatus, or a control module in the CSI feedback apparatus for executing the CSI feedback method. In the embodiment of the present application, a CSI feedback device provided in the embodiment of the present application is described by taking an example of a method for performing CSI feedback by a CSI feedback device.

Fig. 8 is a schematic structural diagram of a CSI feedback apparatus according to an embodiment of the present application, and as shown in fig. 8, the CSI feedback apparatus 800 includes:

a second receiving unit 810, configured to receive CSI-RS configuration information and CSI report configuration information;

a measurement unit 820, configured to perform measurement according to the CSI-RS configuration information, and select at least one group of CMRs from multiple CMR subsets to obtain CSI;

a feedback unit 830, configured to feed back the CSI to a network side device according to the CSI report configuration information.

The CSI feedback apparatus provided in the embodiment of the present application selects at least one CMR group from multiple CMR subsets, and may implement coherent joint transmission of multiple TRPs.

Optionally, the CSI comprises one of:

one CSI corresponding to one CMR group;

one CSI corresponding to a plurality of CMR groups;

Optionally, the CSI further comprises at least one of:

CSI corresponding to X single TRPs;

wherein X, Y is an integer of zero or more.

Optionally, the CSI corresponding to the CMR group includes:

n sub-precoding matrix indicator PMIs;

phase information corresponding to the M1 sub PMIs;

amplitude or power information corresponding to the M2 sub-PMIs;

wherein each sub PMI corresponds to one CMR; n is the number of CMRs included in each CMR group; m1 and M2 are both integers of 0 or more and N or less.

wherein, the quantized values of the amplitude or power corresponding to the M2 sub-PMIs are quantized values of the largest M2 amplitude or power values among the amplitude or power values corresponding to the N sub-PMIs.

Optionally, the larger the amplitude or power value is, the higher or lower the quantization precision of the corresponding amplitude or power quantization value is; the quantization accuracy of the amplitude or power quantization values corresponding to different CMRs or transmission reception points TRP can be preset or configured.

m1 phase quantization values;

the corresponding relation between M1 phase quantization values and N sub PMIs;

wherein, the M1 phase quantization values are phase quantization values corresponding to M1 sub-PMIs with the largest amplitude or power value.

Optionally, the method further comprises:

a first determining unit, configured to determine priorities of the N sub-PMIs according to amplitude or power information corresponding to the N sub-PMIs;

the feedback unit is used for:

and feeding back PMIs corresponding to part of the N sub PMIs, phase information and amplitude or power information to network side equipment according to the priority of the N sub PMIs.

Optionally, the method further comprises: a first calculation unit to:

calculating a precoding matrix according to the phase information corresponding to the N sub-PMIs, the M1 sub-PMIs and the amplitude or power information corresponding to the M2 sub-PMIs by using the following formula:

W _new ＝[p ₁ θ ₁ W ₁ p ₂ θ ₂ W ₂ … p _N θ _N W _N ]

wherein, W _new As a precoding matrix, W _n Precoding matrix, p, corresponding to the nth sub PMI _n Amplitude information or power information corresponding to the nth sub PMI θ _n N =1,2, … N as phase information corresponding to the nth sub-PMI, and 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; the θ is in a case where the CSI does not include phase information corresponding to an nth sub PMI _n Is 0 or 1.

The CSI feedback apparatus in the embodiment of the present application may be an apparatus, an apparatus or an electronic device having an operating system, or a component, an integrated circuit, or a chip in a terminal. The device or the electronic equipment can be a mobile terminal or a non-mobile terminal. For example, the mobile terminal may include, but is not limited to, the above-listed type of terminal 11, and the non-mobile terminal may be a server, a Network Attached Storage (NAS), a Personal Computer (PC), a Television (TV), a teller machine, a kiosk, or the like, and the embodiments of the present application are not limited in particular.

The CSI feedback apparatus provided in the embodiment of the present application can implement each process implemented in the method embodiment of fig. 4, and achieve the same technical effect, and is not described herein again to avoid repetition.

Fig. 9 is a second schematic structural diagram of a CSI feedback apparatus according to an embodiment of the present application, and as shown in fig. 9, the CSI feedback apparatus 900 includes:

a second sending unit 910, configured to send CSI-RS configuration information and CSI report configuration information to a terminal;

a third receiving unit 920, configured to receive the channel state information CSI fed back by the terminal.

Optionally, the CSI comprises one of:

one CSI corresponding to one CMR group;

one CSI corresponding to a plurality of CMR groups;

Optionally, the CSI further comprises at least one of:

CSI corresponding to X single TRPs;

wherein X, Y is an integer of zero or more.

Optionally, the CSI corresponding to the CMR group includes:

n sub-precoding matrix indicator PMIs;

phase information corresponding to the M1 sub PMIs;

amplitude or power information corresponding to the M2 sub-PMIs;

the corresponding relation between M2 amplitude or power quantization values and the N sub-PMIs;

m1 phase quantization values;

the corresponding relation between M1 phase quantization values and N sub PMIs;

Optionally, the method further comprises: a second calculation unit configured to:

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, calculating a precoding matrix by using the following formula:

W _new ＝[p ₁ θ ₁ W ₁ p ₂ θ ₂ W ₂ … p _N θ _N W _N ]

wherein, W _new As a precoding matrix, W _n Precoding matrix corresponding to the nth sub PMI, p _n Amplitude information or power information corresponding to the nth sub PMI θ _n N =1,2, … N for phase information corresponding to the nth sub-PMI, and the CSI is notWhen amplitude information or power information corresponding to the nth sub PMI is included, the p _n Is 0 or 1; the θ is in a case where the CSI does not include phase information corresponding to an nth sub PMI _n Is 0 or 1.

Optionally, the method further comprises:

a second determining unit, configured to determine a channel parameter according to the precoding matrix;

The CSI feedback device provided in the embodiment of the present application receives CSI fed back by a terminal, where the CSI includes CRI, sub-PMI, phase information, and amplitude or power information, and implements coherent joint transmission of multiple TRPs.

The CSI feedback apparatus in the embodiment of the present application may be an apparatus, an apparatus or an electronic device having an operating system, or a component, an integrated circuit, or a chip in a terminal. The device or the electronic equipment can be a mobile terminal or a non-mobile terminal. For example, the mobile terminal may include, but is not limited to, the type of the terminal 11 listed above, and the non-mobile terminal may be a server, a Network Attached Storage (NAS), a Personal Computer (PC), a television (television), a teller machine (teller machine), a self-service machine (kiosk), or the like, and the embodiments of the present application are not limited in particular.

The CSI feedback apparatus provided in the embodiment of the present application can implement each process implemented in the method embodiment of fig. 5, and achieve the same technical effect, and is not described herein again to avoid repetition.

Optionally, as shown in fig. 10, an embodiment of the present application further provides a communication device 1000, which includes a processor 1001, a memory 1002, and a program or an instruction stored in the memory 1002 and executable on the processor 1001, for example, when the communication device 1000 is a terminal, the program or the instruction is executed by the processor 1001 to implement each process of the above CSI-RS configuration method or CSI feedback method embodiment, and can achieve the same technical effect. When the communication device 1000 is a network-side device, the program or the instruction is executed by the processor 1001 to implement each process of the above CSI-RS configuration method or CSI feedback method embodiment, and the same technical effect can be achieved, and in order to avoid repetition, details are not repeated here.

The embodiment of the application also provides a terminal, which comprises a processor and a communication interface, wherein the communication interface is used for receiving the configuration information of the channel state information reference signal CSI-RS; the CSI-RS configuration information is used for indicating the association relation between the CSI-RS ports and the multiple groups of quasi co-located QCL reference sources. Or the communication interface is used for receiving channel state information reference signal (CSI-RS) configuration information and Channel State Information (CSI) report configuration information, and the processor is used for measuring according to the CSI-RS configuration information and selecting at least one CMR group from a plurality of CMR subsets to obtain CSI; the communication interface is further configured to feed back the CSI to a network side device according to the CSI report configuration information. The terminal embodiment corresponds to the terminal-side method embodiment, and all implementation processes and implementation manners of the method embodiment can be applied to the terminal embodiment and can achieve the same technical effect. Specifically, fig. 11 is a schematic diagram of a hardware structure of a terminal for implementing the embodiment of the present application.

The terminal 1100 includes, but is not limited to: at least some of the components of the radio frequency unit 1101, the network module 1102, the audio output unit 1103, the input unit 1104, the sensor 1105, the display unit 1106, the user input unit 1107, the interface unit 1108, the memory 1109, the processor 1110, and the like.

Those skilled in the art will appreciate that terminal 1100 can also include a power supply (e.g., a battery) for powering the various components, which can be logically coupled to processor 1110 via a power management system to facilitate managing charging, discharging, and power consumption via the power management system. The terminal structure shown in fig. 11 does not constitute a limitation of the terminal, and the terminal may include more or less components than those shown, or combine some components, or have a different arrangement of components, and thus will not be described again.

It should be understood that in the embodiment of the present application, the input Unit 1104 may include a Graphics Processing Unit (GPU) 11041 and a microphone 11042, and the Graphics processor 11041 processes image data of still pictures or video obtained by an image capturing device (such as a camera) in a video capturing mode or an image capturing mode. The display unit 1106 may include a display panel 11061, and the display panel 11061 may be configured in the form of a liquid crystal display, an organic light emitting diode, or the like. The user input unit 1107 includes a touch panel 11071 and other input devices 11072. A touch panel 11071, also called a touch screen. The touch panel 11071 may include two portions of a touch detection device and a touch controller. Other input devices 11072 may include, but are not limited to, a physical keyboard, function keys (e.g., volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which are not described in detail herein.

In this embodiment, the radio frequency unit 1101 receives downlink data from a network device and processes the downlink data to the processor 1110; in addition, the uplink data is sent to the network side equipment. In general, 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, and the like.

The memory 1109 may be used for storing software programs or instructions as well as various data. The memory 1109 may mainly include a storage program or instruction area and a storage data area, wherein the storage program or instruction area may store an operating system, an application program or instruction (such as a sound playing function, an image playing function, etc.) required for at least one function, and the like. In addition, the Memory 1109 may include a high-speed random access Memory and may also include a nonvolatile Memory, which may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable Programmable PROM (EPROM), an Electrically Erasable Programmable ROM (EEPROM), or a flash Memory. Such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device.

Processor 1110 may include one or more processing units; alternatively, processor 1110 may integrate an application processor that primarily handles operating systems, user interfaces, and applications or instructions, etc. and a modem processor that primarily handles wireless communications, such as a baseband processor. It will be appreciated that the modem processor described above may not be integrated into processor 1110.

The radio frequency unit 1101 is configured to receive channel state information reference signal CSI-RS configuration information;

Optionally, the CSI-RS resource further satisfies at least one of:

each set of QCL reference sources includes at least one QCL reference source;

In the embodiment of the application, the terminal realizes the association of the plurality of TRPs to the terminal by receiving the CSI-RS configuration information which is sent by the network side equipment and used for indicating the association relationship between the CSI-RS port and the plurality of groups of QCLs, and is applicable to the coherent joint transmission scene of the plurality of TRPs.

Alternatively, the first and second electrodes may be,

a radio frequency unit 1101, configured to receive CSI-RS configuration information and CSI report configuration information;

a processor 1110, configured to perform measurement according to the CSI-RS configuration information, and select at least one CMR group from multiple CMR subsets to obtain CSI;

the radio frequency unit 1101 is further configured to feed back the CSI to a network side device according to the CSI report configuration information.

Optionally, the CSI comprises one of:

one CSI corresponding to one CMR group;

one CSI corresponding to a plurality of CMR groups;

Optionally, the CSI further comprises at least one of:

CSI corresponding to X single TRPs;

wherein X, Y is an integer of zero or more.

Optionally, the CSI corresponding to the CMR group includes:

n sub-precoding matrix indicator PMIs;

phase information corresponding to the M1 sub PMIs;

m2 amplitude or power information corresponding to the sub PMI;

wherein the M2 quantized amplitude or power values are quantized values of M2 maximum amplitude or power values among the amplitude or power values corresponding to the N sub-PMIs.

m1 phase quantization values;

the corresponding relation between M1 phase quantization values and N sub PMIs;

Optionally, the processor 1110 is further configured to:

the radio frequency unit 1101 is further configured to:

Optionally, the processor 1110 is further configured to:

W _new ＝[p ₁ θ ₁ W ₁ p ₂ θ ₂ W ₂ … p _N θ _N W _N ]

In the embodiment of the application, the terminal selects at least one CMR group from a plurality of CMR subsets, and the CSI fed back to the network side equipment comprises CRI, sub PMI, phase information and amplitude or power information, so that the correlation of channel measurement between a plurality of TRPs and the terminal is realized, and the coherent joint transmission of a plurality of TRPs is realized.

The embodiment of the application also provides network side equipment, which comprises a processor and a communication interface, wherein the communication interface is used for sending channel state information reference signal CSI-RS configuration information to a terminal; the CSI-RS configuration information is used for indicating the association relation between the CSI-RS ports and the multiple groups of quasi co-located QCL reference sources. Or 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 the terminal; the communication interface is further configured to receive channel state information CSI fed back by the terminal. The embodiment of the network side device corresponds to the embodiment of the method of the network side device, and all implementation processes and implementation modes of the embodiment of the method can be applied to the embodiment of the network side device and can achieve the same technical effect.

Specifically, the embodiment of the application further provides a network side device. As shown in fig. 12, the network device 1200 includes: antenna 1201, radio frequency device 1202, baseband device 1203. Antenna 1201 is connected to radio frequency device 1202. In the uplink direction, the rf 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 information to be transmitted and transmits the information to the radio frequency device 1202, and the radio frequency device 1202 processes the received information and transmits the processed information through the antenna 1201.

The above band processing means may be located in the baseband apparatus 1203, and the method performed by the network side device in the above embodiment may be implemented in the baseband apparatus 1203, where the baseband apparatus 1203 includes a processor 1204 and a memory 1205.

The baseband apparatus 1203 may include at least one baseband board, for example, on which a plurality of chips are disposed, as shown in fig. 12, where one chip, for example, the processor 1204, is connected to the memory 1205 to call up a program in the memory 1205 to perform the network device operations shown in the above method embodiments.

The baseband apparatus 1203 may further include a network interface 1206 for exchanging information with the radio frequency apparatus 1202, such as a Common Public Radio Interface (CPRI).

Specifically, the network side device according to the embodiment of the present invention further includes: the instructions or programs stored in the memory 1205 and executable on the processor 1204 are called by the processor 1204 to execute the methods executed by the modules shown in fig. 7 or fig. 9, and achieve the same technical effects, which are not described herein in detail to avoid repetition.

The embodiment of the present application further provides a readable storage medium, where a program or an instruction is stored on the readable storage medium, and when the program or the instruction is executed by a processor, the program or the instruction implements each process of the above CSI-RS configuration method or CSI feedback method embodiment, and can achieve the same technical effect, and in order to avoid repetition, details are not repeated here.

Wherein, the processor is the processor in the terminal described in the above embodiment. The readable storage medium includes a computer readable storage medium, such as a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and so on.

An embodiment of the present application further provides a chip, where the chip includes a processor and a communication interface, the communication interface is coupled to the processor, and the processor is configured to run a program or an instruction to implement each process of the above CSI-RS configuration method or CSI feedback method embodiment, and the same technical effect can be achieved, and in order to avoid repetition, details are not repeated here.

It should be understood that the chips mentioned in the embodiments of the present application may also be referred to as a system-on-chip, a system-on-chip or a system-on-chip, etc.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of another identical element in a process, method, article, or apparatus that comprises the element. Further, it should be noted that the scope of the methods and apparatus of the embodiments of the present application is not limited to performing the functions in the order illustrated or discussed, but may include performing the functions in a substantially simultaneous manner or in a reverse order based on the functions involved, e.g., the methods described may be performed in an order different than that described, and various steps may be added, omitted, or combined. In addition, features described with reference to certain examples may be combined in other examples.

Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present application may be embodied in the form of a computer software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (such as a mobile phone, a computer, a server, or a network device) to execute the method according to the embodiments of the present application.

While the present embodiments have been described with reference to the accompanying drawings, it is to be understood that the invention is not limited to the precise embodiments described above, which are meant to be illustrative and not restrictive, and that various changes may be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A CSI-RS configuration method, comprising:

a terminal receives channel state information reference signal CSI-RS configuration information;

2. The CSI-RS configuration method of claim 1, wherein 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 of the CSI-RS ports is associated with a plurality of first Transmission Configuration Indications (TCI) states or a plurality of groups of QCL reference sources, one of the first TCI states corresponding to one of the groups of QCL reference sources;

3. The CSI-RS configuration method according to claim 2, wherein the CSI-RS resource further satisfies at least one of:

each set of QCL reference sources includes at least one QCL reference source;

4. The CSI-RS configuration method according to claim 2, wherein the CSI-RS resources comprise CSI-RS resources for channel measurement and CSI-RS resources for interference measurement.

5. The CSI-RS configuration method according to any of claims 1-4, wherein the CSI-RS configuration information is used for coherent joint transmission, and the CSI feedback based on the CSI-RS configuration information is CSI feedback based on non-precoding matrix indicator (non-PMI).

6. A CSI-RS configuration method, comprising:

7. The CSI-RS configuration method of claim 6, wherein the CSI-RS configuration information comprises at least one CSI-RS resource, wherein one CSI-RS resource comprises at least one CSI-RS port;

8. The CSI-RS configuration method according to claim 7, wherein the CSI-RS resource further satisfies at least one of:

each set of QCL reference sources includes at least one QCL reference source;

where multiple sets of QCL reference sources are associated with each CSI-RS port, each of the multiple sets of QCL reference sources comprising a different number and/or type of QCL reference sources;

9. The CSI-RS configuration method of claim 7, wherein the CSI-RS resources comprise CSI-RS resources for channel measurement and CSI-RS resources for interference measurement.

10. The CSI-RS configuration method according to any of claims 6-9, wherein the CSI-RS configuration information is used for coherent joint transmission, and wherein the CSI feedback based on the CSI-RS configuration information is CSI feedback based on non-precoding matrix indicator (non-PMI).

11. A CSI feedback method, comprising:

the terminal receives channel state information reference signal CSI-RS configuration information and channel state information CSI report configuration information;

12. The CSI feedback method of claim 11, wherein the CSI comprises one of:

one CSI corresponding to one CMR group;

one CSI corresponding to a plurality of CMR groups;

13. The CSI feedback method according to claim 12, wherein the CSI further comprises:

CSI corresponding to X single TRPs;

wherein X, Y is an integer of zero or more.

14. The CSI feedback method according to claim 12 or 13, wherein the CSI corresponding to the CMR group comprises:

n sub-precoding matrix indicator PMIs;

phase information corresponding to the M1 sub PMIs;

amplitude or power information corresponding to the M2 sub-PMIs;

15. The CSI feedback method of claim 14, wherein the amplitude or power information corresponding to the M2 sub-PMIs comprises at least one of the following:

16. The CSI feedback method according to claim 14, wherein the phase information corresponding to the M1 sub-PMIs comprises at least one of the following:

m1 phase quantization values;

the corresponding relation between M1 phase quantization values and N sub PMIs;

17. The CSI feedback method of claim 14, wherein before the terminal feeds back the CSI to the network side device according to the CSI report configuration information, the method further comprises:

18. The CSI feedback method according to claim 14, further comprising:

W _new ＝[p ₁ θ ₁ W ₁ p ₂ θ ₂ W ₂ … p _N θ _N W _N ]

19. A CSI feedback method, comprising:

20. The CSI feedback method of claim 19, wherein the CSI comprises one of:

one CSI corresponding to one CMR group;

one CSI corresponding to a plurality of CMR groups;

21. The CSI feedback method of claim 20, wherein the CSI further comprises at least one of the following:

CSI corresponding to X single TRPs;

wherein X, Y is an integer of zero or more.

22. The CSI feedback method of claim 20 or 21, wherein the CSI corresponding to the CMR group comprises:

n sub-precoding matrix indicator PMIs;

phase information corresponding to the M1 sub PMIs;

amplitude or power information corresponding to the M2 sub-PMIs;

23. The CSI feedback method of claim 22, wherein the amplitude or power information corresponding to the M2 sub-PMIs comprises at least one of the following:

24. The CSI feedback method according to claim 22, wherein the phase information corresponding to the M1 sub-PMIs comprises at least one of the following:

m1 phase quantization values;

the corresponding relation between M1 phase quantization values and N sub PMIs;

25. The CSI feedback method of claim 22, further comprising:

the network side equipment calculates a precoding matrix according to the phase information corresponding to the N sub-PMIs, the M1 sub-PMIs and the amplitude or power information corresponding to the M2 sub-PMIs by using the following formula:

W _new ＝[p ₁ θ ₁ W ₁ p ₂ θ ₂ W ₂ … p _N θ _N W _N ]

26. The CSI feedback method according to claim 25, further comprising:

determining channel parameters according to the precoding matrix;

27. An apparatus for CSI-RS configuration, comprising:

28. The CSI-RS configuration apparatus of claim 27, wherein the CSI-RS configuration information comprises at least one CSI-RS resource, wherein one CSI-RS resource comprises at least one CSI-RS port;

29. An apparatus for CSI-RS configuration, comprising:

30. A CSI feedback apparatus, comprising:

31. The CSI feedback apparatus of claim 30, wherein the CSI comprises one of:

one CSI corresponding to one CMR group;

one CSI corresponding to a plurality of CMR groups;

32. The CSI feedback apparatus of claim 31, wherein the CSI corresponding to the CMR group comprises:

n sub-precoding matrix indicator PMIs;

phase information corresponding to the M1 sub PMIs;

m2 amplitude or power information corresponding to the sub PMI;

33. The CSI feedback apparatus of claim 32, further comprising:

the feedback unit is used for:

34. The CSI feedback apparatus of claim 33, further comprising: a first computing unit to:

W _new ＝[p ₁ θ ₁ W ₁ p ₂ θ ₂ W ₂ … p _N θ _N W _N ]

wherein, W _new As a precoding matrix, W _n Precoding matrix corresponding to the nth sub PMI, p _n Amplitude information or power information corresponding to the nth sub PMI θ _n N =1,2, … N for phase information corresponding to the nth sub-PMI, and 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; the θ is in a case where the CSI does not include phase information corresponding to an nth sub PMI _n Is 0 or 1.

35. A CSI feedback apparatus, comprising:

and the third receiving unit is used for receiving the channel state information CSI fed back by the terminal.

36. The CSI feedback apparatus of claim 35, wherein the CSI comprises one of:

one CSI corresponding to one CMR group;

one CSI corresponding to a plurality of CMR groups;

37. The CSI feedback apparatus of claim 36, wherein the CSI corresponding to the CMR group comprises:

n sub-precoding matrix indicator PMIs;

phase information corresponding to the M1 sub PMIs;

amplitude or power information corresponding to the M2 sub-PMIs;

38. The CSI feedback apparatus of claim 37, further comprising: a second calculation unit configured to:

W _new ＝[p ₁ θ ₁ W ₁ p ₂ θ ₂ W ₂ … p _N θ _N W _N ]

39. A terminal comprising a processor, a memory, and a program or instructions stored on the memory and executable on the processor, the program or instructions, when executed by the processor, implementing the steps of the CSI-RS configuration method according to any of claims 1 to 5, or implementing the steps of the CSI feedback method according to any of claims 11 to 18.

40. A network side device comprising a processor, a memory and a program or instructions stored on the memory and executable on the processor, wherein the program or instructions, when executed by the processor, implement the steps of the CSI-RS configuration method according to any of claims 6 to 10 or implement the steps of the CSI feedback method according to any of claims 19 to 26.

41. A readable storage medium, on which a program or instructions are stored, which, when executed by a processor, carry out the steps of the CSI-RS configuration method according to any one of claims 1 to 5, or carry out the steps of the CSI feedback method according to any one of claims 11 to 18, or carry out the steps of the CSI-RS configuration method according to any one of claims 6 to 10, or carry out the steps of the CSI feedback method according to any one of claims 19 to 26.