CN110943804B

CN110943804B - Method and device for determining channel state information

Info

Publication number: CN110943804B
Application number: CN201811109456.6A
Authority: CN
Inventors: 苏昕; 李辉; 陈润华; 高秋彬; 缪德山
Original assignee: Datang Mobile Communications Equipment Co Ltd
Current assignee: Datang Mobile Communications Equipment Co Ltd
Priority date: 2018-09-21
Filing date: 2018-09-21
Publication date: 2022-01-25
Anticipated expiration: 2038-09-21
Also published as: CN110943804A

Abstract

The invention provides a method and a device for determining channel state information, which relate to the technical field of communication, and the method comprises the following steps: the method comprises the steps that network side equipment determines a measurement mode of Channel State Information (CSI), wherein the measurement mode is that the network side equipment uses P code words for transmission, at least one code word in the P code words is transmitted through transmission points corresponding to at least two demodulation reference signal port groups (DMRS port groups), and P is a positive integer less than or equal to 2; the network side equipment determines M CSI-RS resources according to the measurement mode, the M CSI-RS resources are used for the terminal to determine Channel State Information (CSI) of transmission channels corresponding to P code words, the transmission channels corresponding to the code words are transmission channels from transmission points of the code words to the terminal, and M is larger than or equal to P. The invention provides a method for determining CSI (channel state information) suitable for multipoint incoherent transmission.

Description

Method and device for determining channel state information

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for determining channel state information.

Background

Mobile and broadband are the development direction of modern communication technology, and 5G, a fifth generation mobile phone mobile communication standard, also called a fifth generation mobile communication technology, is also an extension after 4G. As a main direction of development of new-generation information communication, 5G will permeate into various fields of future society, and construct an all-around information ecosystem centering on users.

The MIMO (Multiple-Input Multiple-Output) technology is to use a plurality of transmitting antennas and receiving antennas at a transmitting end and a receiving end, respectively, so that signals are transmitted and received through the plurality of antennas at the transmitting end and the receiving end, thereby improving communication quality. The multi-antenna multi-transmission multi-receiving system can fully utilize space resources, realize multi-transmission and multi-reception through a plurality of antennas, and improve the system channel capacity by times under the condition of not increasing frequency spectrum resources and antenna transmitting power.

In order to improve the coverage at the cell edge and provide more balanced service quality in the service area, a coordinated multi-point transmission technology is adopted in the prior art. Coordinated multipoint transmission techniques can be broadly divided into coherent and non-coherent transmissions. Wherein, in coherent transmission, each data layer is mapped onto a plurality of TRPs/panels by the weighting vector. And in non-coherent transmission, each data stream is mapped onto only a portion of the TRP/panel.

The feedback of the Channel State Information (CSI) determines the performance of MIMO transmission, so that the MIMO design has a significant role, and the network side device can perform reasonable scheduling according to the CSI reported by the UE. However, the feedback mechanism defined by the standard in the prior art is for single-point transmission and coherent multipoint transmission, and cannot support multipoint non-coherent transmission, that is, a method for determining CSI for multipoint non-coherent transmission is lacking in the prior art.

Disclosure of Invention

The invention provides a method and a device for determining channel state information, which are used for solving the problem that a method for determining CSI for multipoint noncoherent transmission is lacked in the prior art.

The invention provides a method for determining channel state information, which comprises the following steps:

the method comprises the steps that network side equipment determines a measurement mode of Channel State Information (CSI), wherein the measurement mode is that the network side equipment uses P code words for transmission, at least one code word in the P code words is transmitted through transmission points corresponding to at least two demodulation reference signal port groups (DMRS port groups), and P is a positive integer less than or equal to 2;

and the network side equipment determines M CSI-RS resources according to the measurement mode, wherein the M CSI-RS resources are used for the terminal to determine the CSI of the transmission channels corresponding to the P code words, the transmission channels corresponding to the code words are the transmission channels from the transmission points of the code words to the terminal, and M is greater than or equal to P.

In the embodiment of the invention, the network side equipment firstly determines the measurement mode, determines and determines M CSI-RS resources according to the determined measurement mode, so that the terminal performs calculation according to the determined M CSI-RS resources. Through the method, the embodiment of the invention can provide a method for determining the CSI suitable for multipoint non-coherent transmission.

Further, the M CSI-RS resources at least include a first CSI-RS resource and a second CSI-RS resource, the first CSI-RS resource corresponds to a first DMRS port group, the second CSI-RS resource corresponds to a second DMRS port group, the first CSI-RS resource is used for the terminal to estimate an estimated value of a transmission channel corresponding to the first CSI-RS resource, the second CSI-RS resource is used for the terminal to estimate an estimated value of a transmission channel corresponding to the second CSI-RS resource, the transmission channel corresponding to the first CSI-RS resource is a transmission channel from a transmission point corresponding to the first DMRS port group to the terminal, the transmission channel corresponding to the second CSI-RS resource is a transmission channel from a transmission point corresponding to the second DMRS group to the terminal, wherein M is greater than or equal to P.

Further, the M CSI-RS resources further include a third CSI-RS resource, where the third CSI-RS resource is used for the terminal to estimate noise received by the terminal; and/or

The third CSI-RS resource is further configured to estimate, by the terminal, an interference estimation value of other interference received by the terminal.

Further, after the network side device determines M CSI-RS resources according to the measurement method, the method further includes:

the network side equipment determines indication information corresponding to the M CSI-RS resources, wherein the indication information corresponding to the M CSI-RS resources is used for indicating the terminal to determine transmission Channel State Information (CSI) corresponding to the P code words according to the M CSI-RS resources;

and the network side equipment sends the indication information corresponding to the M CSI-RS resources to the terminal.

Further, the sending, by the network side device, the indication information corresponding to the M CSI-RS resources to the terminal includes:

the network side equipment adds the indication information corresponding to the M CSI-RS resources into a CSI-RS measurement resource parameter and sends the CSI-RS measurement resource parameter to the terminal, wherein the CSI-RS measurement resource parameter is used for indicating the terminal to measure according to the CSI measurement resource parameter; or

The network side equipment informs M pieces of indication information corresponding to the CSI-RS resources through a high-level signaling; or

And the network side equipment informs the M pieces of indication information corresponding to the CSI-RS resources through physical lower layer signaling.

the network side equipment determines CSI-RS configuration information, the CSI-RS configuration information comprises a CSI-RS measurement resource parameter and reporting feedback parameters corresponding to the CSI-RS measurement resource parameter, the CSI-RS measurement resource parameter comprises M pieces of indication information corresponding to the CSI-RS resources, and the reporting feedback parameters are used for indicating reporting contents and feedback modes after the terminal measures the CSI;

and the network side equipment sends the CSI-RS configuration information to the terminal.

Further, the indication information corresponding to the M CSI-RS resources includes first indication information and/or second indication information and/or third indication information;

for any first CSI-RS resource, the first indication information is used for indicating the terminal to estimate a channel estimation value of a transmission channel corresponding to the first CSI-RS resource according to the first CSI-RS resource;

for any second CSI-RS resource, the second indication information is used for indicating the terminal to estimate a channel estimation value of a transmission channel corresponding to the second CSI-RS resource according to the second CSI-RS resource;

for any third CSI-RS resource, the third indication information is used for indicating the terminal to estimate the noise received by the terminal according to the third CSI-RS resource; and/or

And the third indication information is used for indicating the terminal to estimate the interference estimation value of other interference received by the terminal according to the third CSI-RS resource.

An embodiment of the present invention further provides a device for determining channel state information, including:

a measurement mode determining unit, configured to determine a measurement mode of channel state information CSI, where the measurement mode is that the network side device uses P codewords for transmission, and at least one of the P codewords is transmitted through a transmission point corresponding to at least two demodulation reference signal port groups DMRS port groups, where P is a positive integer less than or equal to 2;

and the resource determining unit is used for determining M CSI-RS resources according to the measurement mode, wherein the M CSI-RS resources are used for a terminal to determine the CSI of transmission channels corresponding to P code words, the transmission channels corresponding to the code words are transmission channels from the transmission points of the code words to the terminal, and M is greater than or equal to P.

In the embodiment of the invention, the measurement mode is determined firstly, and M resources are determined according to the determined measurement mode, so that the terminal calculates the CSI according to the M resource groups. Through the method, the embodiment of the invention can provide a method for determining the CSI suitable for multipoint non-coherent transmission.

The M CSI-RS resources at least comprise a first CSI-RS resource and a second CSI-RS resource, the first CSI-RS resource corresponds to a first DMRS port group, the second CSI-RS resource corresponds to a second DMRS port group, the first CSI-RS resource is used for the terminal to estimate an estimation value of a transmission channel corresponding to the first CSI-RS resource, the second CSI-RS resource is used for the terminal to estimate an estimation value of a transmission channel corresponding to the second CSI-RS resource, the transmission channel corresponding to the first CSI-RS resource is a transmission channel from a transmission point corresponding to the first DMRS port group to the terminal, the transmission channel corresponding to the second CSI-RS resource is a transmission channel from a transmission point corresponding to the second DMRS port group to the terminal, wherein M is greater than or equal to P.

Further, the resource determining unit is further configured to:

determining indication information corresponding to the M CSI-RS resources, wherein the indication information corresponding to the M CSI-RS resources is used for indicating the terminal to determine transmission Channel State Information (CSI) corresponding to the P code words according to the M CSI-RS resources;

and sending the indication information corresponding to the M CSI-RS resources to the terminal.

Further, the resource determining unit is specifically configured to:

adding the indication information corresponding to the M CSI-RS resources into a CSI-RS measurement resource parameter, and sending the CSI-RS measurement resource parameter to the terminal, wherein the CSI-RS measurement resource parameter is used for indicating the terminal to measure according to the CSI measurement resource parameter; or

Informing M pieces of indication information corresponding to the CSI-RS resources through a high-level signaling; or

And informing the indication information corresponding to the M CSI-RS resources through physical lower layer signaling.

Further, the resource determining unit is further configured to:

determining CSI-RS configuration information, wherein the CSI-RS configuration information comprises a CSI-RS measurement resource parameter and reporting feedback parameters corresponding to the CSI-RS measurement resource parameter, the CSI-RS measurement resource parameter comprises indication information corresponding to M CSI-RS resources, and the reporting feedback parameters are used for indicating the reporting content and the feedback mode after a terminal measures CSI;

and sending the CSI-RS configuration information to the terminal.

An embodiment of the present invention further provides an electronic device, including:

at least one processor; and the number of the first and second groups,

a memory communicatively coupled to the at least one processor; wherein the content of the first and second substances,

the memory stores instructions executable by the at least one processor to cause the at least one processor to perform any of the methods described above.

Embodiments of the present invention also provide a non-transitory computer-readable storage medium storing computer instructions for causing a computer to perform any one of the methods described above.

The invention also provides a method for determining the channel state information, which comprises the following steps:

a terminal receives M CSI-RS resources sent by a network side device, wherein the M CSI-RS resources at least comprise a first CSI-RS resource and a second CSI-RS resource, the first CSI-RS resource corresponds to a first DMRS port group, the second CSI-RS resource corresponds to a second DMRS port group, the M CSI-RS resources are determined by the network side device according to a Channel State Information (CSI) measurement mode, the measurement mode is that the network side device uses P code words to transmit, and at least one code word in the P code words is transmitted through DMRS transmission points corresponding to at least two demodulation reference signal port group groups, wherein P is a positive integer less than or equal to 2, and M is greater than or equal to P;

and the terminal determines the state information CSI of the transmission channel corresponding to the P code words according to the M CSI-RS resources, wherein the transmission channel is a transmission channel from the transmission points of the P code words to the terminal.

In the embodiment of the invention, the terminal determines the CSI of the transmission channels corresponding to the P code words according to the M CSI-RS resources arranged on the network side, and the terminal specifically realizes the calculation of the CSI by utilizing the first CSI-RS resource and the second CSI-RS resource, so the embodiment of the invention provides the method for determining the CSI suitable for multipoint incoherent transmission.

Further, the determining, by the terminal, the CSI for transmitting channel state information CSI corresponding to the P codewords according to the M CSI-RS resources includes:

the terminal estimates a channel estimation value of a transmission channel corresponding to the first CSI-RS resource according to the first CSI-RS resource;

the terminal estimates a channel estimation value of a transmission channel corresponding to the second CSI-RS resource according to the second CSI-RS resource;

and the terminal determines the CSI of the transmission channels corresponding to the P code words according to the channel estimation value of the transmission channel corresponding to the first CSI-RS resource and the channel estimation value of the transmission channel corresponding to the second CSI-RS resource.

Further, a third CSI-RS resource is further included in the M CSI-RS resources, and the method further includes:

the terminal estimates the noise received by the terminal according to the third CSI-RS resource; and/or

And the terminal estimates the interference estimation value of other interference received by the terminal according to the third CSI-RS resource.

Further, the determining, by the terminal, the CSI of the transmission channels corresponding to the P codewords according to the channel estimation value of the transmission channel corresponding to the first CSI-RS resource and the channel estimation value of the transmission channel corresponding to the second CSI-RS resource includes:

and the terminal determines the CSI of the transmission channels corresponding to the P code words according to the channel estimation value of the transmission channel corresponding to the first CSI-RS resource, the channel estimation value of the transmission channel corresponding to the second CSI-RS resource and the interference estimation values of the noise received by the terminal and/or other interference received by the terminal.

Further, the method further comprises:

the terminal acquires indication information corresponding to M CSI-RS resources, wherein the indication information comprises first indication information and/or second indication information and/or third indication information;

the terminal estimates a channel estimation value of a transmission channel corresponding to the first CSI-RS resource according to the first CSI-RS resource, and the method comprises the following steps:

the terminal estimates a channel estimation value of a transmission channel corresponding to the first CSI-RS resource according to the first indication information and the first CSI-RS resource, wherein the first indication information is used for indicating the terminal to estimate the channel estimation value of the transmission channel corresponding to the first CSI-RS resource according to the first CSI-RS resource;

the terminal estimates a channel estimation value of a transmission channel corresponding to the second CSI-RS resource according to the second CSI-RS resource, and the method comprises the following steps:

the terminal estimates a channel estimation value of a transmission channel corresponding to the second CSI-RS resource according to the second indication information and the second CSI-RS resource, wherein the second indication information is used for indicating the terminal to estimate the channel estimation value of the transmission channel corresponding to the second CSI-RS resource according to the second CSI-RS resource;

the terminal estimates the noise received by the terminal according to the third CSI-RS resource, and the method comprises the following steps:

the terminal estimates the noise received by the terminal according to the third indication information and the third CSI-RS resource, wherein the third indication information is used for indicating the terminal to estimate the noise received by the terminal according to the third CSI-RS resource;

the terminal estimates an interference estimation value of other interference received by the terminal according to the third CSI-RS resource, and the method comprises the following steps:

and the terminal estimates the interference estimation value of other interference received by the terminal according to the third indication information and the third CSI-RS resource, wherein the third indication information is used for indicating the terminal to estimate the interference estimation value of other interference received by the terminal according to the third CSI-RS resource.

Further, the obtaining, by the terminal, the indication information corresponding to the M CSI-RS resources includes:

the terminal receives CSI-RS measurement resource parameters sent by the network side equipment, wherein the CSI-RS measurement resource parameters comprise indication information corresponding to M CSI-RS resources; or

The terminal receives a high-level signaling sent by the network side equipment, wherein the high-level signaling comprises indication information corresponding to M CSI-RS resources; or

And the terminal receives a physical lower layer signaling sent by the network side equipment, wherein the physical lower layer signaling comprises indication information corresponding to the M CSI-RS resources.

Further, for each codeword, the CSI includes a precoding matrix indicator PMI corresponding to a CSI-RS resource corresponding to the codeword, a rank indicator RI corresponding to the CSI-RS resource corresponding to the codeword, and a channel quality indicator CQI corresponding to the codeword.

the terminal determines Channel State Information (CSI) of transmission channels corresponding to the P code words according to assumed conditions and the M CSI-RS resources;

wherein the assumed conditions are as follows:

for codeword 0 of P codewords, codeword 0 corresponds to DMRS port group1 and DMRS port group2, where Rcw01 layer data is transmitted on DMRS port group1, Rcw02 layer data is transmitted on DMRS port group2, and the sum of the Rcw01 layer data and the Rcw02 layer data is the number of data layers of codeword 0;

the method comprises the steps that the PMI/RI corresponding to the first CSI-RS resource corresponding to the DMRS port group1 is adopted in Rcw01 layer data of a code word sent through DMRS port group1, and the Rcw01 layer data are transmitted to the terminal through a transmission point corresponding to the DMRS port group 1;

the method comprises the steps that the PMI/RI corresponding to the second CSI-RS resource corresponding to the DMRS port group2 is adopted in Rcw02 layer data of a code word sent through DMRS port group2, and the Rcw02 layer data are transmitted to the terminal through a transmission point corresponding to the DMRS port group 2; or

A codeword 0 and a codeword 1 correspond to two DMRS port groups and are DMRS port group1 and DMRS port group2, respectively, where a data layer of the codeword 0 is a, a data layer of the codeword 1 is B, data a is transmitted on the DMRS port group1, data B is transmitted on the DMRS port group2, the data a includes data a1 and data B1, the data B includes data a2 and data B2, a1+ a2 is a, and B1+ B2 is B;

the data of the layer A sent through the DMRS port group1 adopts the PMI/RI corresponding to the first CSI-RS resource and the DMRS port group1, and the data of the layer A is transmitted to the terminal through the transmission point corresponding to the DMRS port group 1;

and B-layer data sent through the DMRS port group2 adopts the PMI/RI corresponding to the second CSI-RS resource corresponding to the DMRS port group2, and is transmitted to the terminal through a transmission point corresponding to the DMRS port group 2.

the terminal determines Channel State Information (CSI) of transmission channels corresponding to the M code words according to the M CSI-RS resources;

the terminal reports Channel State Information (CSI) of transmission channels corresponding to the P code words; or

The terminal determines Channel State Information (CSI) of a transmission channel corresponding to P code words according to P CSI-RS resources in the M CSI-RS resources, wherein the P CSI-RS resources correspond to the P code words;

and the terminal reports the CSI of the transmission channels corresponding to the P code words.

the receiving unit is used for receiving M CSI-RS resources sent by a network side device, wherein the M CSI-RS resources at least comprise a first CSI-RS resource and a second CSI-RS resource, the first CSI-RS resource corresponds to a first DMRS port group, the second CSI-RS resource corresponds to a second DMRS port group, the M CSI-RS resources are determined by the network side device according to a Channel State Information (CSI) measuring mode, the measuring mode is that the network side device uses P code words to transmit, and at least one code word in the P code words is transmitted through transmission points corresponding to at least two demodulation reference signal port groups DMRS port groups, wherein P is a positive integer less than or equal to 2, and M is greater than or equal to P;

and the CSI determining unit is used for determining the transmission channel state information CSI corresponding to the P code words according to the M CSI-RS resources, wherein the transmission channel is a transmission channel from the transmission points of the P code words to a terminal.

In the embodiment of the invention, the CSI of the transmission channels corresponding to the P code words is determined according to M CSI-RS resource groups arranged on a network side, and the calculation of the CSI is specifically realized by utilizing the first CSI-RS resource and the second CSI-RS resource, so that the embodiment of the invention provides the method for determining the CSI suitable for multipoint incoherent transmission.

Further, the CSI determining unit is specifically configured to:

estimating a channel estimation value of a transmission channel corresponding to the first CSI-RS resource according to the first CSI-RS resource;

estimating a channel estimation value of a transmission channel corresponding to the second CSI-RS resource according to the second CSI-RS resource;

and determining Channel State Information (CSI) of the transmission channels corresponding to the P code words according to the channel estimation value of the transmission channel corresponding to the first CSI-RS resource and the channel estimation value of the transmission channel corresponding to the second CSI-RS resource.

Further, the M CSI-RS resources further include a third CSI-RS resource, and the CSI determining unit is further configured to: estimating the noise received by the terminal according to the third CSI-RS resource; and/or

And estimating the interference estimation value of other interference received by the terminal according to the third CSI-RS resource.

Further, the CSI determining unit is specifically configured to:

and determining Channel State Information (CSI) of the transmission channels corresponding to the P code words according to the channel estimation value of the transmission channel corresponding to the first CSI-RS resource, the channel estimation value of the transmission channel corresponding to the second CSI-RS resource and the interference estimation values of the noise received by the terminal and/or other interference received by the terminal.

Further, the receiving unit is further configured to:

acquiring indication information corresponding to the M CSI-RS resources, wherein the indication information comprises first indication information and/or second indication information and/or third indication information;

the CSI determining unit is specifically configured to:

estimating a channel estimation value of a transmission channel corresponding to the first CSI-RS resource according to the first indication information and the first CSI-RS resource, wherein the first indication information is used for indicating the terminal to estimate the channel estimation value of the transmission channel corresponding to the first CSI-RS resource according to the first CSI-RS resource;

estimating a channel estimation value of a transmission channel corresponding to the second CSI-RS resource according to the second indication information and the second CSI-RS resource, wherein the second indication information is used for indicating the terminal to estimate the channel estimation value of the transmission channel corresponding to the second CSI-RS resource according to the second CSI-RS resource;

estimating the noise received by the terminal according to the third indication information and the third CSI-RS resource, wherein the third indication information is used for indicating the terminal to estimate the noise received by the terminal according to the third CSI-RS resource;

and estimating an interference estimation value of other interference received by the terminal according to the third indication information and the third CSI-RS resource, wherein the third indication information is used for indicating the terminal to estimate the interference estimation value of other interference received by the terminal according to the third CSI-RS resource.

Further, the receiving unit is specifically configured to:

receiving CSI-RS measurement resource parameters sent by the network side equipment, wherein the CSI-RS measurement resource parameters comprise indication information corresponding to M CSI-RS resources; or

Receiving a high-level signaling sent by the network side equipment, wherein the high-level signaling comprises indication information corresponding to the M CSI-RS resources; or

And receiving a physical lower layer signaling sent by the network side equipment, wherein the physical lower layer signaling comprises indication information corresponding to the M CSI-RS resources.

Further, the CSI determining unit is specifically configured to:

determining Channel State Information (CSI) of transmission channels corresponding to the P code words according to assumed conditions and the M CSI-RS resources;

wherein the assumed conditions are as follows:

Further, the CSI determining unit is specifically configured to:

determining Channel State Information (CSI) of transmission channels corresponding to the M code words according to the M CSI-RS resources;

reporting Channel State Information (CSI) of transmission channels corresponding to the P code words; or

Determining Channel State Information (CSI) of transmission channels corresponding to P code words according to P CSI-RS resources in the M CSI-RS resources;

and reporting the channel state information CSI of the transmission channels corresponding to the P code words.

at least one processor; and the number of the first and second groups,

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.

Fig. 1 is a schematic structural diagram of a communication architecture according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a communication architecture according to an embodiment of the present invention;

fig. 3 is a flowchart illustrating a method for determining channel state information according to an embodiment of the present invention;

fig. 4 is a flowchart illustrating a method for determining channel state information according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of CSI-RS configuration information according to an embodiment of the present invention;

fig. 6 is a flowchart illustrating a method for determining channel state information according to an embodiment of the present invention;

fig. 7 is a flowchart illustrating a method for determining channel state information according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram of an apparatus for determining channel state information according to an embodiment of the present invention;

fig. 9 is a schematic structural diagram of an electronic device according to an embodiment of the present invention;

fig. 10 is a flowchart illustrating a method for determining channel state information according to an embodiment of the present invention;

fig. 11 is a schematic structural diagram of an apparatus for determining channel state information according to an embodiment of the present invention;

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

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1, fig. 1 is a schematic diagram of an architecture of a communication system according to an embodiment of the present invention; the communication system includes a network side device 101 and a terminal 102. Wherein, the terminal 102 and the network side device 101 communicate with each other through some air interface technology. The air interface technology may include: 2G (e.g. gsm, gsm), 3G ((UMTS, WCDMA), TD-SCDMA), 4G (e.g. FDD LTE, TDD LTE), and New RAT systems, e.g. 5G systems, etc.

The terminal 102 described in the embodiments of the present invention will be introduced in a general sense as a UE. Further, terminal 102 can also be referred to as a mobile station, an access terminal, a subscriber unit, a subscriber station, a mobile station, a remote terminal, a mobile device, a user terminal, a user equipment, a wireless communication device, a user agent, a user equipment, or the like. The user equipment may be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with wireless communication capability, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device, a mobile station in a 5G Network, or a user equipment in a future evolved Public Land Mobile Network (PLMN) Network, etc. In addition, in the embodiment of the present invention, the terminal 102 may further include other devices capable of performing data communication with the network device 101 (e.g., a base station), such as a Relay (Relay).

Fig. 2 is a schematic diagram of another application scenario provided in the embodiment of the present invention. Fig. 2 shows a super cell (supercell) composed of high density Transmission points (TRPs). As shown in fig. 2, in a high density TRP transmission scenario, one terminal 102 may communicate with multiple transmission points to form a user equipment-centric communication system (UE-cell-like). Generally, a plurality of transmission points adjacent in position may be divided into one group, forming a group of transmission points shown by dotted circles in the drawing, which may be referred to as one TRP group (TRP Set), or one cooperative transmission Set. It should be noted that the dividing manner of the TRP groups is not limited to the dividing manner according to the positions, and other dividing manners may also be used, for example, the TRPs with strong correlation are divided into one group, which is not limited in the embodiment of the present invention.

In a specific implementation, the transmission point may be a Base Transceiver Station (BTS) in a GSM system or a CDMA system, or a Base station (NodeB) in a WCDMA system, or an Evolved Node B (eNB or eNodeB) in an LTE system, or a Base station, a femto Base station, and other network devices in a 5G network, which is not limited in this embodiment of the present invention.

Optionally, in the embodiment of the present invention, each Transmission Point may be a cooperative TRP (Transmission/reception Point) or may be a cooperative antenna front (panel).

In the embodiment of the present invention, in the case that multiple TRP/panels perform cooperative transmission, signals transmitted by different TRP/panels may have relatively independent large-scale features, such as average delay, delay spread, average doppler shift, doppler spread, spatial domain reception parameters, and the like. In NR systems, therefore, the case where two or more reference signal channel large-scale parameters are consistent is referred to as a quasi co-located QCL. Otherwise, it is called non-QCL.

Optionally, in this embodiment of the present invention, each DMRS port in the DMRS port group has a QCL relationship, that is, each DMRS port in one group QCL.

Optionally, in this embodiment of the present invention, DMRS ports in the same CDM group also have a QCL relationship.

Optionally, in this embodiment of the present invention, each data channel supports at most two DMRS port groups.

Optionally, in this embodiment of the present invention, one DMRS port group may be transmitted through one transmission point, or may be transmitted through two transmission points, where DMRS ports corresponding to the two transmission points also have a QCL relationship.

According to the system shown in fig. 2, the terminal 102 transmits through multiple transmission points, and in the CoMP transmission method supported by multi-point cooperation, the prior art cannot support the multi-point non-coherent transmission technology (NC-JT).

Optionally, in the embodiment of the present invention, a case where a maximum of two codewords are sent is taken as an example, and the NC-JT may be roughly classified into the following cases:

the first condition is as follows: each downlink physical downlink control channel PDCCH schedules a respective downlink shared channel PDSCH, different PDSCHs are transmitted through different TRPs/panels, and each TRP/panel corresponds to one DMRS port group;

case two: 1 PDCCH schedules 1 PDSCH.

Optionally, in the embodiment of the present invention, the second case corresponds to three transmission cases, which are respectively:

case 2-1: transmitting M code words, wherein each code word transmission corresponds to one TRP/panel, and each TRP/panel corresponds to one DMRS port group;

case 2-2: transmitting 1 code word, wherein the 1 code word is mapped to two TRP/panels, and each TRP/panel corresponds to one DMRS port group;

case 2-3: and transmitting 2 code words, wherein one code word is mapped to two TRPs/panels, the other code word is mapped to one TRP/panel, and each TRP/panel corresponds to one DMRS port group.

Alternatively, in the embodiment of the present invention, although the first case is a multipoint non-coherent transmission technique, since different PDSCHs are transmitted through different TRPs/panels for each transmission point, similar to the case of single-point transmission in the prior art, the CSI feedback mechanism defined in the prior standard may be used.

For cases Case2-2 and Case2-3, an embodiment of the present invention provides a method for determining channel state information CSI, as shown in fig. 3, specifically including:

step 301, a network side device determines a measurement mode of Channel State Information (CSI);

step 302, the network side equipment determines M CSI-RS resources according to the measurement mode;

step 303, the network side equipment sends CSI-RS signals to the terminal through the M CSI-RS resources;

step 304, the terminal sends CSI-RS signals to the terminal through M CSI-RS resources after receiving the signals;

and 305, the terminal determines CSI of transmission channels corresponding to P code words according to CSI-RS signals carried by M CSI-RS resources, wherein M is larger than or equal to P.

In step 301, when a network side device needs to configure a CSI-RS resource for a terminal, a CSI measurement mode is first obtained, in the embodiment of the present invention, the measurement mode is that the network side device uses P codewords for transmission, and at least one codeword in the P codewords is transmitted through a transmission point corresponding to at least two DMRS port groups, where P is a positive integer less than or equal to 2;

that is to say, in the embodiment of the present invention, a network side device sends one codeword or two codewords to a terminal, and the network side device transmits through transmission points corresponding to two DMRS port groups, and when the network side device sends one codeword, the codeword is transmitted through transmission points corresponding to two DMRS port groups; when the network side equipment sends two code words, at least one of the two code words is transmitted through the transmission points corresponding to the two DMRS port groups.

In the embodiment of the present invention, the measurement mode determined by the network side device refers to what mode the network side wants to transmit with the terminal side, the network side needs the terminal side to report CSI of each codeword corresponding to the measurement mode, and the network side determines the transmission quality of the transmission mode according to the reported CSI and further determines whether to transmit according to the transmission mode.

In step 302, the network side device determines M CSI-RS resources according to the measurement mode, where the M CSI-RS resources are used by the terminal to determine channel state information CSI of transmission channels corresponding to P codewords, the transmission channels corresponding to the codewords are transmission channels from a transmission point of the codeword to the terminal, and P is less than or equal to M.

In the embodiment of the invention, although the measurement mode is determined to be that P code words are used for transmission, the network side equipment configures more than or equal to P CSI-RS resources, so that the terminal can report the CSI of the transmission channels corresponding to the P code words according to more than or equal to P CSI-RS resource groups, the reporting accuracy is ensured, and a plurality of methods for determining the CSI are provided for the terminal.

Optionally, in this embodiment of the present invention, the M CSI-RS resources at least include a first CSI-RS resource and a second CSI-RS resource, where the first CSI-RS resource corresponds to a first DMRS port group, the second CSI-RS resource corresponds to a second DMRS port group, the first CSI-RS resource is used by the terminal to estimate an estimated value of a transmission channel corresponding to the first CSI-RS resource, the second CSI-RS resource is used by the terminal to estimate an estimated value of a transmission channel corresponding to the second CSI-RS resource, the transmission channel corresponding to the first CSI-RS resource is a transmission channel from a transmission point corresponding to the first DMRS port group to the terminal, the transmission channel corresponding to the second CSI-RS resource is a transmission channel from a transmission point corresponding to the second DMRS port group to the terminal, and M is greater than or equal to P.

That is to say, in the embodiment of the present invention, since there is at least one codeword transmitted through two DMRS port groups, each DMRS port group may transmit a partial codeword or a complete codeword, and thus when estimating a channel, an estimated value of a transmission channel corresponding to a resource is estimated.

Optionally, in the embodiment of the present invention, since the terminal further needs to consider other interference and/or noise received by the terminal when determining the CSI, in the embodiment of the present invention, the network side further configures a third CSI-RS resource in the M CSI-RS resources, where the third CSI-RS resource is used by the terminal to estimate the noise received by the terminal; and/or the third CSI-RS resource is also used for the terminal to estimate an interference estimate for other interference received by the terminal.

Optionally, in this embodiment of the present invention, the third indication information is used to indicate that the terminal estimates other interference of each layer received by the terminal.

In the embodiment of the invention, the noise received by the terminal is noise in mobile communication and can be divided into internal noise and external noise, wherein the internal noise mainly refers to inherent noise of a terminal receiver, and the external noise mainly refers to natural noise and artificial noise.

Optionally, in step 302, after the network side device determines N CSI-RS resource groups according to the measurement mode, the network side device configures one piece of CSI-RS configuration information, where the CSI-RS configuration information is used to indicate how the terminal uses CSI-RS resources to measure and report which pieces of CSI information to the network side device.

The CSI-RS configuration information comprises CSI-RS measurement Resource parameters (Resource setting) and reporting feedback parameters (Report setting) corresponding to the CSI-RS measurement Resource parameters, the CSI-RS measurement Resource parameters are used for configuring parameters of CSI-RS resources, and the reporting feedback parameters are used for configuring parameter contents fed back to the network side equipment by the terminal.

The reporting of the feedback parameters comprises the configuration of the following parameters: CSI feedback parameters (report quality), codebook configuration, time-domain behavior of CSI feedback, frequency-domain granularity of PMI and CQI, and measurement constraint configuration. Wherein the CSI feedback parameter is used for indicating whether the UE performs beam management related feedback or CSI acquisition related feedback.

Optionally, in the embodiment of the present invention, the M CSI-RS Resource groups are managed by one CSI-RS Resource set (Resource set), and the configuration information of the CSI-RS resources on the CSI-RS Resource set (Resource set) is configured by a CSI-RS measurement Resource parameter (Resource setting). The CSI-RS measurement resource parameter corresponds to a reporting feedback parameter.

Optionally, in step 302, after determining the M CSI-RS resources, the network side device may also configure indication information for the M CSI-RS resources, and the terminal determines CSI of transmission channels corresponding to the P codewords according to the M CSI-RS resources according to the indication information.

Optionally, in this embodiment of the present invention, the indication information of each CSI-RS resource group includes first indication information and/or second indication information and/or third indication information;

aiming at any first CSI-RS resource, the first indication information is used for indicating the terminal to estimate a channel estimation value of a transmission channel corresponding to the first CSI-RS resource according to the first CSI-RS resource;

Optionally, in the embodiment of the present invention, the network side device adds the indication information corresponding to the M CSI-RS resources to the CSI-RS measurement resource parameter.

In step 303, the network side device sends a downlink reference signal to the terminal, and optionally, in the embodiment of the present invention, the downlink reference signal is a CSI-RS signal.

Optionally, in step 303, the network side device further sends CSI-RS configuration information to the terminal.

Optionally, in this embodiment of the present invention, the sending, by the network side device, the indication information corresponding to the M CSI-RS resources to the terminal includes:

the network side equipment sends the CSI-RS measurement resource parameters to the terminal; or

The network side equipment sends the CSI-RS configuration information to the terminal; or

The network side equipment informs the terminal of indicating information corresponding to the N CSI-RS resource groups through a high-level signaling; or

And the network side equipment informs the terminal of the indication information corresponding to the N CSI-RS resource groups through physical downlink signaling.

Optionally, in this embodiment of the present invention, the higher layer signaling is RRC (Radio Resource Control) signaling.

Optionally, in this embodiment of the present invention, the Physical Downlink signaling may be DCI (Downlink Control Information) carried by a PDCCH (Physical Downlink Control Channel).

In step 304, the terminal receives the CSI-RS signals sent to the terminal through the M CSI-RS resources, or the terminal receives the CSI-RS signals sent to the terminal through the M CSI-RS resources and the CSI configuration information sent by the terminal receiving network side, or the terminal receives the CSI-RS measurement resource parameters sent to the terminal through the N CSI-RS resource groups and sent by the terminal receiving network side device.

Optionally, in step 304, if the terminal receives the indication information configured on the network side, the terminal may be considered to receive the indication information in the following manner, specifically:

the terminal receives CSI-RS measurement resource parameters sent by network side equipment, wherein the CSI-RS measurement resource parameters comprise indication information corresponding to M CSI-RS resources; or

A terminal receives a high-level signaling sent by network side equipment, and a broadcast signaling comprises indication information corresponding to M CSI-RS resources; or

And the terminal receives a physical downlink signaling sent by the network side equipment, wherein the physical downlink signaling comprises indication information corresponding to the M CSI-RS resources.

Optionally, in the embodiment of the present invention, if the terminal receives the indication information sent by the network side device, the indication information includes first indication information and/or second indication information and/or third indication information;

Optionally, in the embodiment of the present invention, the terminal determines the indication information corresponding to the M CSI-RS resources according to the number of the received CSI-RS resources and the binding relationship between the number of the CSI-RS resources and the indication information.

Optionally, in the embodiment of the present invention, the binding relationship is pre-established and stored in the terminal.

In step 305, the terminal estimates a channel estimation value of a transmission channel corresponding to the first CSI-RS resource according to the first CSI-RS resource; and the terminal estimates a channel estimation value of a transmission channel corresponding to the second CSI-RS resource according to the second CSI-RS resource.

Optionally, in the embodiment of the present invention, since the terminal further needs to consider other interference and/or noise received by the terminal when determining the CSI, in the embodiment of the present invention, the terminal estimates the noise received by the terminal according to the third CSI-RS resource; and/or the terminal estimates the interference estimation value of other interference received by the terminal according to the third CSI-RS resource.

Optionally, in the embodiment of the present invention, the terminal estimates, according to the third CSI-RS resource, an interference estimation value of other interference of each layer received by the terminal.

Optionally, in step 305, the terminal determines the CSI of the transmission channels corresponding to the P codewords according to the channel estimation value of the transmission channel corresponding to the first CSI-RS resource and the channel estimation value of the transmission channel corresponding to the second CSI-RS resource.

Likewise, in step 305, the terminal may determine the CSI of the transmission channels corresponding to the P codewords according to the M CSI-RS resources and the indication information corresponding to the M CSI-RS resources.

Optionally, in this embodiment of the present invention, the terminal may obtain part of the indication information, for example, the terminal obtains the first indication information, the terminal estimates, according to the first indication information and the first CSI-RS resource, a channel estimation value of a transmission channel corresponding to the first CSI-RS resource, and the terminal estimates, according to the second indication information and the second CSI-RS resource, a channel estimation value of a transmission channel corresponding to the second CSI-RS resource; the terminal estimates the noise received by the terminal according to the third CSI-RS resource; and/or the terminal estimates the interference estimation value of other interference received by the terminal according to the third CSI-RS resource.

Optionally, in this embodiment of the present invention, for each codeword, the CSI includes a precoding matrix indicator PMI corresponding to a CSI-RS resource corresponding to the codeword, a rank indicator RI corresponding to the CSI-RS resource corresponding to the codeword, and a channel quality indicator CQI corresponding to the codeword.

That is to say, in the embodiment of the present invention, what the terminal reports to the network side device is the PMI/RI corresponding to the CSI-RS resource corresponding to each codeword and the CQI corresponding to the codeword. Optionally, in the embodiment of the present invention, the terminal may determine the content to be reported according to the reporting feedback parameter, and may report all or part of the content.

For example, in the embodiment of the present invention, if a measurement mode is that one codeword corresponds to two CSI-RS resources, a PMI/RI corresponding to each CSI-RS resource is determined, and a CQI corresponding to the codeword is determined; and when the measurement mode is two code words, the two code words correspond to two CSI-RS resources, and then the PMI/RI corresponding to each CSI-RS resource and the CQI corresponding to the two code words are determined.

Optionally, in the embodiment of the present invention, the PMI may be a high-precision PMI, or may be a low-precision PMI.

Optionally, in the embodiment of the present invention, when determining, by the terminal, the transmission channel state information CSI corresponding to the P code words according to the M CSI-RS resources, the following assumed conditions are included:

aiming at codeword 0 in P codewords, codeword 0 corresponds to DMRS port group1 and DMRS port group2, wherein Rcw01 layer data are transmitted on DMRS port group1, Rcw02 layer data are transmitted on DMRS port group2, and the sum of Rcw01 layer data and Rcw02 layer data is the number of data layers of codeword 0;

the PMI/RI corresponding to the first CSI-RS resource corresponding to the DMRS port group1 is adopted in the Rcw01 layer data of the code word sent through the DMRS port group1, and the Rcw01 layer data is transmitted to the terminal through the transmission point corresponding to the DMRS port group 1;

the PMI/RI corresponding to the second CSI-RS resource corresponding to the DMRS port group2 is adopted in the Rcw02 layer data of the code word sent through the DMRS port group2, and the Rcw02 layer data is transmitted to the terminal through the transmission point corresponding to the DMRS port group 2; or

the data of the layer A sent through the DMRS port group1 adopts the PMI/RI corresponding to the first CSI-RS resource corresponding to the DMRS port group1, and the data of the layer A is transmitted to the terminal through the transmission point corresponding to the DMRS port group 1;

and B-layer data sent through the DMRS port group2 adopts PMI/RI corresponding to a second CSI-RS resource corresponding to DMRS port group2, and is transmitted to the terminal through a transmission point corresponding to DMRS port group 2.

That is, in the embodiment of the present invention, when P is 1, one codeword is transmitted through DMRS port group1 and DMRS port group2, where data of partial codeword 0 is transmitted on each DMRS port group, data of codeword 0 transmitted on DMRS port group1 uses PMI/RI corresponding to the first CSI-RS resource, and data of codeword 0 transmitted on DMRS port group2 uses PMI/RI corresponding to the second CSI-RS resource.

When P is 2, at least one of the two codewords is transmitted through DMRS port group1 and DMRS port group2, that is, in the embodiment of the present invention, there are three cases, that is, in the first case, codeword 0 is transmitted through DMRS port group1 and DMRS port group2, and codeword 1 is transmitted through DMRS port group1 or DMRS port group 2; secondly, a code word 1 is transmitted through DMRS port group1 and DMRS port group2, and a code word 0 is transmitted through DMRS port group1 or DMRS port group 2; third, codeword 0 and codeword 1 are both transmitted through DMRS port group1 and DMRS port group 2.

Therefore, in the embodiment of the present invention, the sum of the data layers transmitted by DMRS port group1 and DMRS port group2 is the sum of the data layers of codeword 0 and codeword 1.

Optionally, in the embodiment of the present invention, for Case2-2 and Case2-3, the PMI/RI corresponding to each CSIR-RS resource is stored in the terminal in advance.

Of course, in the embodiment of the present invention, the terminal also assumes that other interference and/or noise is received during the transmission.

Optionally, in this embodiment of the present invention, the determining, by the terminal, the CSI of the transmission channel state information corresponding to the P codewords according to the M CSI-RS resources includes:

To better explain the method for determining channel state information provided by the embodiment of the present invention, as illustrated in fig. 4, in the embodiment of the present invention, P is 1, that is, a measurement manner is that a network-side device uses 1 codeword for transmission, and the codeword is transmitted through DMRS port group pa and DMRS port group pa, where DMRS port group pa corresponds to TRP/panel a and DMRS port group pb corresponds to TRP/panel b, and the specific process is as follows:

step 401, the network side device determines three CSI-RS resources according to the measurement mode, which are respectively resource 1, resource 2 and resource 3;

step 402, the network side device determines indication information corresponding to three CSI-RS resources, specifically:

aiming at Resource 1, estimating a TRP/panel A channel to a terminal;

for Resource 2: for estimating the TRP/panel A channel to the terminal;

for Resource 3: for estimating interference and noise;

step 403, for the three CSI-RS resources, the network side device configures one piece of CSI-RS configuration information, where the CSI-RS configuration information includes one CSI-RS measurement resource parameter, the CSI-RS measurement resource parameter corresponds to one CSI-RS resource set, the CSI-RS resource set corresponds to the three CSI-RS resources, and the CSI-RS measurement resource parameter corresponds to one reporting feedback parameter, as shown in fig. 5;

step 404, the network side equipment sends the three CSI-RS resources and the CSI-RS configuration information to the terminal through a high-level signaling;

step 405, a terminal receives three CSI-RS resources and CSI-RS configuration information sent by network side equipment;

step 406, the terminal estimates a channel H of TRP A from TRP/panel A to the terminal according to Resource 1 and the first indication information corresponding to Resource 1;

step 407, the terminal estimates a channel H of TRP B from TRP/panel B to the terminal according to Resource 2 and second indication information corresponding to Resource 2;

step 408, the terminal estimates other interference and/or noise (I + N) according to Resource 3 and the third indication information corresponding to Resource 3;

in step 409, the terminal determines, from H of TRP a, I + N, and H of TRP B, PMI/RI (denoted as PMI _ a/RI _ a) of a signal transmitted via DMRS port group a (corresponding to TRP/panel a), PMI/RI (denoted as PMI _ B/RI _ B) of a signal transmitted via DMRS port group B (corresponding to TRP/panel B), and CQI corresponding to the codeword, and assumes, when determining the CSI, that:

the signal sent by the DMRS port group A (corresponding to the TRP/panel A) uses the PMI _ A/RI _ A corresponding to the CSI-RS Resource corresponding to the DMRS port group A, and reaches the terminal through a channel (estimated by Resource 1) from the TRP/panel A to the terminal;

the signal sent by the DMRS port group B (corresponding to the TRP/panel B) uses the PMI _ B/RI _ B corresponding to the CSI-RS Resource corresponding to the DMRS port group B, and reaches the terminal through a channel (obtained by Resource 2 estimation) from the TRP/panel B to the terminal;

and the terminal also assumes that other interference/noise is received;

in step 410, the terminal feeds back PMI _ a/RI _ a, PMI _ B/RI _ B and CQI corresponding to codeword 0 to the network side device.

In the embodiment of the present invention, the sequence of steps 406-408 may be reversed.

To better explain a method for determining channel state information provided by the embodiment of the present invention, as shown in fig. 6 by way of example, in the embodiment of the present invention, P is 2, that is, a measurement manner is that a network-side device uses 2 codewords for transmission, codeword 0 is transmitted through DMRS port group pa and DMRS port group pa, codeword 1 is transmitted through DMRS port group pa and DMRS port group pa, DMRS port group pa corresponds to TRP/panel a, and DMRS port group pb corresponds to TRP/panel b, and the specific process is as follows:

step 601, the network side equipment determines three CSI-RS resources according to the measurement mode, wherein the three CSI-RS resources are respectively Reource1, Reource2 and Reource 3;

step 602, the network side device determines indication information corresponding to three CSI-RS resources, which specifically includes:

aiming at Resource 1, estimating a TRP/panel A channel to a terminal;

for Resource 2: for estimating the TRP/panel A channel to the terminal;

for Resource 3: for estimating interference and noise.

Step 603, for three CSI-RS resources, the network side device configures one piece of CSI-RS configuration information, where the CSI-RS configuration information includes one CSI-RS measurement resource parameter, the CSI-RS measurement resource parameter corresponds to one CSI-RS resource set, the CSI-RS resource set corresponds to three CSI-RS resources, and the CSI-RS measurement resource parameter corresponds to one reporting feedback parameter, as shown in fig. 5;

step 604, the network side equipment sends the three CSI-RS resources and the CSI-RS configuration information to the terminal through a high-level signaling;

step 605, the terminal receives three CSI-RS resources and CSI-RS configuration information sent by the network side equipment;

step 606, the terminal estimates the TRP/panel A to the channel H of TRP A of the terminal according to the Resource 1 and the first indication information corresponding to the Resource 1;

step 607, the terminal estimates the TRP/panel B to the channel H of TRP B of the terminal according to Resource 2 and the second indication information corresponding to Resource 2;

step 608, the terminal estimates other interference and/or noise (I + N) according to Resource 3 and the third indication information corresponding to Resource 3;

step 609, the terminal determines, from H of TRP a, I + N and H of TRP B, PMI/RI (denoted as PMI _ a/RI _ a) of a signal transmitted via DMRS port group a (corresponding to TRP/panel a), PMI/RI (denoted as PMI _ B/RI _ B) of a signal transmitted via DMRS port group B (corresponding to TRP/panel B) (and CQI corresponding to codeword 0 and CQI corresponding to codeword 1), and the terminal makes the following assumptions when determining the CSI:

determining a data layer and a DMRS port set corresponding to a codeword 0 and a data layer and a DMRS port set corresponding to a codeword 1 according to a predefined corresponding relationship between the codeword and the layer and a DMRS port;

RI _ A layer data sent by a DMRS port group A (corresponding to TRP/panel A) adopts PMI _ A/RI _ A corresponding to Resource 1 and reaches the terminal through a channel from the TRP/panel A to the terminal (estimated by Rsource 1);

the RI _ B layer data sent through the DMRS port group B (corresponding to TRP/panel B) adopts the PMI _ B/RI _ B corresponding to Resource 1 and reaches the terminal through the channel from the TRP/panel B to the terminal (estimated by Resource 2);

and the terminal also assumes that other interference/noise is received;

in step 610, the terminal feeds back PMI _ a/RI _ a, CQI corresponding to PMI _ B/RI _ B and codeword 0, and CQI corresponding to codeword 1 to the network side device.

In the embodiment of the present invention, the sequence of step 606 to step 608 may be reversed.

Based on the structure of fig. 1, an embodiment of the present invention further provides a method for determining channel state information, as shown in fig. 7, including:

step 701, a network side device determines a measurement mode of Channel State Information (CSI), where the measurement mode is that the network side device uses P code words for transmission, and at least one code word in the P code words is transmitted through transmission points corresponding to at least two demodulation reference signal port groups (DMRS port groups), where P is a positive integer less than or equal to 2;

step 702, a network side device determines M CSI-RS resources according to the measurement mode, where the M CSI-RS resources are used by a terminal to determine channel state information CSI of transmission channels corresponding to P codewords, and the transmission channels corresponding to the codewords are transmission channels from a transmission point of the codeword to the terminal, where M is greater than or equal to P.

An embodiment of the present invention further provides a device for determining channel state information, as shown in fig. 8, including:

a measurement mode determining unit 801, configured to determine a measurement mode of channel state information CSI, where the measurement mode is that the network side device uses P codewords for transmission, and at least one of the P codewords is transmitted through a transmission point corresponding to at least two demodulation reference signal port groups DMRS port group, where P is a positive integer less than or equal to 2;

a resource determining unit 802, configured to determine M CSI-RS resources according to the measurement manner, where the M CSI-RS resources are used by a terminal to determine channel state information CSI of transmission channels corresponding to P codewords, where the transmission channels corresponding to the codewords are transmission channels from a transmission point of the codeword to the terminal, and M is greater than or equal to P.

An embodiment of the present invention further provides an electronic device, as shown in fig. 9, including:

the device comprises a processor 901, a memory 902, a transceiver 903 and a bus interface 904, wherein the processor 901, the memory 902 and the transceiver 903 are connected through the bus interface 904;

the processor 901 is configured to read the program in the memory 902, and execute the following methods:

determining a measurement mode of Channel State Information (CSI), wherein the measurement mode is that the network side equipment uses P code words for transmission, and at least one code word in the P code words is transmitted through transmission points corresponding to at least two demodulation reference signal port groups (DMRS port groups), and P is a positive integer less than or equal to 2;

and determining M CSI-RS resources according to the measurement mode, wherein the M CSI-RS resources are used for a terminal to determine the CSI of transmission channels corresponding to P code words, the transmission channels corresponding to the code words are transmission channels from the transmission points of the code words to the terminal, and M is greater than or equal to P.

An embodiment of the present invention provides a computer program product comprising a computer program stored on a non-transitory computer-readable storage medium, the computer program comprising program instructions that, when executed by a computer, cause the computer to perform any of the above methods for determining channel state information.

The present invention further provides a method for determining channel state information, as shown in fig. 10, including:

step 1001, a terminal receives M CSI-RS resources sent by a network side device, where the M CSI-RS resources include at least a first CSI-RS resource and a second CSI-RS resource, the first CSI-RS resource corresponds to a first DMRS port group, the second CSI-RS resource corresponds to a second DMRS port group, the M CSI-RS resources are determined by the network side device according to a measurement mode of channel state information CSI, the measurement mode is that the network side device uses P codewords for transmission, and at least one of the P codewords is transmitted through transmission points corresponding to at least two demodulation reference signal port groups DMRS port groups, where P is a positive integer less than or equal to 2, and M is greater than or equal to P;

step 1002, the terminal determines, according to the M CSI-RS resources, transmission channel state information CSI corresponding to the P codewords, where the transmission channel is a transmission channel from a transmission point of the P codewords to the terminal.

An embodiment of the present invention further provides a device for determining channel state information, as shown in fig. 11, including:

a receiving unit 1101, configured to receive M CSI-RS resources sent by a network side device, where the M CSI-RS resources at least include a first CSI-RS resource and a second CSI-RS resource, the first CSI-RS resource corresponds to a first DMRS port group, the second CSI-RS resource corresponds to a second DMRS port group, the M CSI-RS resources are determined by the network side device according to a measurement mode of channel state information CSI, the measurement mode is that the network side device uses P codewords for transmission, and at least one codeword among the P codewords is transmitted through transmission points corresponding to at least two demodulation reference signal port groups DMRS port groups, where P is a positive integer less than or equal to 2, and M is greater than or equal to P;

a CSI determining unit 1102, configured to determine, according to the M CSI-RS resources, transmission channel state information CSI corresponding to the P codewords, where the transmission channel is a transmission channel from a transmission point of the P codewords to a terminal.

An embodiment of the present invention further provides an electronic device, as shown in fig. 12, including:

the system comprises a processor 1201, a memory 1202, a transceiver 1203 and a bus interface 1204, wherein the processor 1201, the memory 1202 and the transceiver 1203 are connected through the bus interface 1204;

the processor 1201 is configured to read the program in the memory 1202 and execute the following method:

receiving M CSI-RS resources sent by a network side device, wherein the M CSI-RS resources at least comprise a first CSI-RS resource and a second CSI-RS resource, the first CSI-RS resource corresponds to a first DMRS port group, the second CSI-RS resource corresponds to a second DMRS port group, the M CSI-RS resources are determined by the network side device according to a measurement mode of Channel State Information (CSI), the measurement mode is that the network side device uses P code words to transmit, and at least one code word in the P code words is transmitted through DMRS transmission points corresponding to at least two demodulation reference signal port group groups, wherein P is a positive integer less than or equal to 2, and M is greater than or equal to P;

and determining the transmission Channel State Information (CSI) corresponding to the P code words according to the M CSI-RS resources, wherein the transmission channel is a transmission channel from the transmission point of the P code words to a terminal.

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. A method for determining channel state information, the method comprising:

2. The method of claim 1, wherein the M CSI-RS resources comprise at least a first CSI-RS resource and a second CSI-RS resource, the first CSI-RS resource corresponds to a first DMRS port group, the second CSI-RS resource corresponds to a second DMRS port group, the first CSI-RS resource is used for the terminal to estimate an estimated value of a transmission channel corresponding to the first CSI-RS resource, the second CSI-RS resource is used for the terminal to estimate an estimated value of a transmission channel corresponding to the second CSI-RS resource, the transmission channel corresponding to the first CSI-RS resource is a transmission channel from a transmission point corresponding to the first DMRS port group to the terminal, the transmission channel corresponding to the second CSI-RS resource is a transmission channel from a transmission point corresponding to the second DMRS port group to the terminal, wherein M is greater than or equal to P.

3. The method of claim 2, wherein the M CSI-RS resources further include a third CSI-RS resource, and wherein the third CSI-RS resource is used by the terminal to estimate the noise received by the terminal; and/or

4. The method of claim 3, wherein after the network-side device determines the M CSI-RS resources according to the measurement method, the method further comprises:

5. The method according to claim 4, wherein the sending, by the network side device, the indication information corresponding to the M CSI-RS resources to the terminal includes:

6. The method of claim 5, wherein after the network-side device determines the M CSI-RS resources according to the measurement method, the method further comprises:

7. The method according to claim 4, wherein the indication information corresponding to the M CSI-RS resources comprises first indication information and/or second indication information and/or third indication information;

8. A method for determining channel state information, the method comprising:

9. The method according to claim 8, wherein the determining, by the terminal, the CSI for the CSI corresponding to the P codewords according to the M CSI-RS resources comprises:

10. The method of claim 9, wherein the M CSI-RS resources further comprise a third CSI-RS resource, the method further comprising:

11. The method according to claim 10, wherein the determining, by the terminal, the CSI of the transmission channels corresponding to the P codewords according to the channel estimation value of the transmission channel corresponding to the first CSI-RS resource and the channel estimation value of the transmission channel corresponding to the second CSI-RS resource comprises:

12. The method of claim 10, further comprising:

13. The method of claim 12, wherein the obtaining, by the terminal, indication information corresponding to the M CSI-RS resources comprises:

14. The method of claim 12, wherein the obtaining, by the terminal, indication information corresponding to the M CSI-RS resources comprises:

and the terminal determines the indication information corresponding to the M CSI-RS resources according to the received number of the CSI-RS resources and the binding relationship between the number of the CSI-RS resources and the indication information.

15. The method according to any of claims 8-14, wherein for each codeword, the CSI comprises a precoding matrix indicator, PMI, corresponding to a CSI-RS resource corresponding to the codeword, a rank indicator, RI, corresponding to a CSI-RS resource corresponding to the codeword, and a channel quality indicator, CQI, corresponding to the codeword.

16. The method according to claim 15, wherein the determining, by the terminal, the CSI for the CSI corresponding to the P codewords according to the M CSI-RS resources comprises:

wherein the assumed conditions are as follows:

17. The method according to claim 8, wherein the determining, by the terminal, the CSI for the CSI corresponding to the P codewords according to the M CSI-RS resources comprises:

18. An apparatus for determining channel state information, comprising:

19. An apparatus for determining channel state information, comprising:

20. An electronic device, comprising:

at least one processor; and the number of the first and second groups,

the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the method of any one of claims 1-7.

21. A non-transitory computer readable storage medium storing computer instructions for causing a computer to perform the method of any one of claims 1-7.

22. An electronic device, comprising:

at least one processor; and the number of the first and second groups,

the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the method of any one of claims 8-17.

23. A non-transitory computer readable storage medium storing computer instructions for causing a computer to perform the method of any one of claims 8-17.