CN110943814B

CN110943814B - Method and device for determining channel state information

Info

Publication number: CN110943814B
Application number: CN201811108896.XA
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: 2022-10-18
Anticipated expiration: 2038-09-21
Also published as: CN110943814A

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 a network side device determines a measuring mode of Channel State Information (CSI), the network side device determines N CSI-RS resource groups according to the measuring mode, each CSI-RS resource group at least comprises one first CSI-RS resource and M-1 second CSI-RS resources, the first CSI-RS resource is used for a terminal to estimate a channel estimation value of a transmission channel of a code word corresponding to the first CSI-RS resource, the M-1 second CSI-RS resources are used for the terminal to estimate interference estimation values of interference of other M-1 other code words received when the code word corresponding to the first CSI-RS resource is received, the transmission channel corresponding to the code word is a transmission channel from a transmission point of the code word to the terminal, and N is larger than or equal to M. The invention provides a CSI determination method suitable for multipoint noncoherent 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 developing direction of modern communication technology, and 5G, the fifth generation mobile phone mobile communication standard, also called as 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 Multiple transmitting antennas and Multiple receiving antennas at a transmitting end and a receiving end, respectively, so that signals are transmitted and received through the Multiple antennas at the transmitting end and the receiving end, thereby improving communication quality. The multi-antenna multi-transmission multi-reception 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, when the data is transmitted coherently, each data layer is mapped onto multiple TRPs/panels by the weight 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 a network side device determines a measurement mode of Channel State Information (CSI), wherein the measurement mode is that the network side device uses M code words to transmit through transmission points corresponding to M demodulation reference signal port groups (DMRS port groups), wherein M is larger than or equal to 1, and each code word corresponds to one DMRS port group;

the network side equipment determines N CSI-RS resource groups according to the measurement mode, each CSI-RS resource group at least comprises a first CSI-RS resource and M-1 second CSI-RS resources, the first CSI-RS resource is used for the terminal to estimate a channel estimation value of a transmission channel of a code word corresponding to the first CSI-RS resource, the M-1 second CSI-RS resources are used for the terminal to estimate interference estimation values of interference of other M-1 other code words received when the terminal receives the code word corresponding to the first CSI-RS resource, the transmission channel corresponding to the code word is a transmission channel from a transmission point of the code word to the terminal, and N is larger than or equal to M.

In the embodiment of the invention, the network side equipment firstly determines the measurement mode, and determines N resource groups according to the determined measurement mode, so that the terminal can calculate according to the N resource groups. Through the method, the embodiment of the invention can provide a method for determining the CSI suitable for multipoint non-coherent transmission.

Further, the CSI-RS resource group further includes 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 the N CSI-RS resource sets, the method further includes:

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

and the network side equipment sends the indication information corresponding to the N CSI-RS resource groups to the terminal.

The network side equipment sends the indication information corresponding to the N CSI-RS resource groups to the terminal, and the method comprises the following steps:

the network side equipment adds the indication information corresponding to the N CSI-RS resource groups 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 the terminal N of indication information corresponding to the 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.

Further, after the network side device determines the N CSI-RS resource groups, the method further includes:

the network side equipment determines CSI-RS configuration information aiming at each CSI-RS resource group, the CSI-RS configuration information comprises a CSI-RS measurement resource parameter set and a reporting feedback parameter corresponding to the CSI-RS measurement resource parameter set, the CSI-RS measurement resource parameter set at least comprises indication information corresponding to one CSI-RS resource group, and the reporting feedback parameter is used for indicating terminal reporting content and a feedback mode;

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

Further, the indication information of each CSI-RS resource group comprises first indication information and/or second indication information and/or third indication information;

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

for each CSI-RS resource group, the second indication information is used for indicating the terminal to estimate interference estimation values of interference of other M-1 other code words received when receiving the code word according to M-1 second CSI-RS resources;

for each CSI-RS resource group, 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 M codewords to transmit through transmission points corresponding to M demodulation reference signal port groups DMRS port groups, where M is greater than or equal to 1, and each codeword corresponds to one DMRS port group;

and a CSI-RS resource group determining unit, configured to determine N CSI-RS resource groups according to the measurement manner, where each CSI-RS resource group includes at least one first CSI-RS resource and M-1 second CSI-RS resources, where the first CSI-RS resource is used by the terminal to estimate a channel estimation value of a transmission channel of a codeword corresponding to the first CSI-RS resource, the M-1 second CSI-RS resources are used by the terminal to estimate an interference estimation value of interference of other M-1 other codewords received when the codeword corresponding to the first CSI-RS resource is received, the transmission channel corresponding to the codeword is a transmission channel from a transmission point of the codeword to the terminal, and N is greater than or equal to M.

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

Further, the CSI resource group determining unit is specifically configured to:

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

and sending the indication information corresponding to the N CSI-RS resource groups to the terminal.

Further, the CSI resource group determining unit is specifically configured to:

adding indication information corresponding to the N CSI-RS resource groups 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 the terminal N of indication information corresponding to the CSI-RS resource groups through a high-level signaling; or informing the terminal of the indication information corresponding to the N CSI-RS resource groups through physical downlink signaling.

Further, the CSI resource group determining unit is specifically configured to:

determining CSI-RS configuration information for each CSI-RS resource group, wherein the CSI-RS configuration information comprises a CSI-RS measurement resource parameter set and a reporting feedback parameter corresponding to the CSI-RS measurement resource parameter set, the CSI-RS measurement resource parameter set at least comprises indication information corresponding to one CSI-RS resource group, and the reporting feedback parameter is used for indicating the reporting content and the feedback mode of a terminal;

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

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

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:

the method comprises the steps that a terminal receives N CSI-RS resource groups sent by network side equipment, wherein each CSI-RS resource group at least comprises a first CSI-RS resource and M-1 second CSI-RS resources, the CSI-RS resource groups are determined by the network side equipment according to a measuring mode of Channel State Information (CSI), the measuring mode is that the network side equipment uses M code words to transmit through transmission points corresponding to M demodulation reference signal port groups (DMRS port groups), M is larger than or equal to 1, and each code word corresponds to one DMRS port group;

and the terminal determines Channel State Information (CSI) of transmission channels corresponding to the M code words according to the N CSI-RS resource groups, wherein the transmission channels are transmission channels from the transmission points of the code words to the terminal, and M is less than or equal to N.

In the embodiment of the invention, the terminal determines the CSI of the transmission channels corresponding to the M code words according to the N CSI-RS resource groups arranged on the network side, and the terminal specifically realizes the calculation of the CSI by utilizing the first CSI-RS resource and the M-1 second CSI-RS resources in each resource group, so the embodiment of the invention provides the method for determining the CSI suitable for multipoint incoherent transmission.

Further, the determining, by the terminal, channel state information CSI of a transmission channel corresponding to a codeword according to the N CSI-RS resource groups includes:

for each CSI-RS resource group, the terminal estimates a channel estimation value of a transmission channel of a code word corresponding to the first CSI-RS resource according to the first CSI-RS resource;

and the terminal estimates interference estimation values of the interference of other M-1 code words received when receiving the code words corresponding to the first CSI-RS resource according to the M-1 second CSI-RS resources.

Further, each CSI-RS resource group further includes a third CSI-RS resource, and the method further includes:

for each CSI-RS resource group, 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 aiming at each CSI-RS resource group.

Further, the obtaining, by the terminal, the indication information corresponding to the N 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 N CSI-RS resources; or alternatively

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

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

Further, the determining, by the terminal, channel state information CSI of transmission channels corresponding to the M codewords according to the N CSI-RS resource groups includes:

and for each CSI-RS resource group, the terminal determines the CSI of the transmission channel of the code word corresponding to the first CSI-RS resource according to the channel estimation value, the interference estimation value, the noise estimation value and/or the interference estimation value of other interference.

Further, the method further comprises:

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

for each CSI-RS resource group, the terminal estimates a channel estimation value of a transmission channel corresponding to the code word 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 of a code word 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 of the code word corresponding to the first CSI-RS resource according to the first CSI-RS resource;

for each CSI-RS resource group, the terminal estimates, according to the M-1 second CSI-RS resources, interference estimation values of interference of other M-1 other code words received when receiving the code word corresponding to the first CSI-RS resource, including:

the terminal estimates interference estimation values of interference of other M-1 other code words received when receiving the code word corresponding to the first CSI-RS resource according to the second indication information and the M-1 second CSI-RS resources, wherein the second indication information is used for indicating the terminal to estimate the interference estimation values of the interference of other M-1 other code words received when receiving the code word corresponding to the first CSI-RS resource according to the M-1 second CSI-RS resources;

for each CSI-RS resource group, 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;

for each CSI-RS resource group, the terminal estimates the CSI-RS resource 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, indication information corresponding to the N CSI-RS resource groups 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 N CSI-RS resource groups; or

The terminal receives a high-level signaling sent by the network side equipment, wherein the high-level signaling comprises indication information corresponding to N CSI-RS resource groups; 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 N CSI-RS resource groups.

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 M code words according to assumed conditions and the N CSI-RS resource groups;

wherein the assumed conditions are as follows:

for each CSI-RS resource group, the terminal assumes that a code word corresponding to the first CSI-RS resource sent through a DMRS port group corresponding to the first CSI-RS resource uses a PMI/RI corresponding to the first CSI-RS resource, and transmits the code word to the terminal through a transmission point corresponding to the DMRS port group;

for each CSI-RS resource group, the terminal assumes that the interference of other M-1 code words received when the code word corresponding to the first CSI-RS resource is received is transmitted through the DMRS port group corresponding to the other M-1 code words, and each layer of any interference in the M-1 interference corresponds to one port of one second CSI-RS resource.

Further, the determining, by the terminal, channel state information CSI of transmission channels corresponding to the M codewords according to the N CSI-RS resource groups by the terminal includes:

the terminal determines Channel State Information (CSI) of a transmission channel corresponding to the N code words according to the N CSI-RS resource groups;

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

The terminal determines Channel State Information (CSI) of transmission channels corresponding to M code words according to M CSI-RS resource groups in the N CSI-RS resource groups;

and the terminal reports the channel state information CSI of the transmission channels corresponding to the M code words.

the receiving unit is used for receiving N CSI-RS resource groups sent by network side equipment, wherein each CSI-RS resource group at least comprises a first CSI-RS resource and M-1 second CSI-RS resources, and the CSI-RS resource group is determined by the network side equipment according to a measurement mode of Channel State Information (CSI), the measurement mode is that the network side equipment uses M code words to transmit through transmission points corresponding to M demodulation reference signal port groups (DMRS port groups), wherein M is greater than or equal to 1, and each code word corresponds to one DMRS port group;

and the CSI determining unit is used for determining Channel State Information (CSI) of transmission channels corresponding to the M code words according to the N CSI-RS resource groups, wherein the transmission channels are transmission channels from transmission points of the code words to a terminal, and M is less than or equal to N.

In the embodiment of the invention, the CSI of the transmission channels corresponding to the M code words is determined according to the N CSI-RS resource groups arranged on the network side, and the calculation of the CSI is specifically realized by utilizing the first CSI-RS resource and the M-1 second CSI-RS resources in each resource group, 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:

for each CSI-RS resource group, estimating a channel estimation value of a transmission channel of a code word corresponding to the first CSI-RS resource according to the first CSI-RS resource;

and estimating interference estimation values of the interference of other M-1 code words received when the code words corresponding to the first CSI-RS resources are received according to the M-1 second CSI-RS resources.

Further, each CSI-RS resource group further includes a third CSI-RS resource, and the CSI determining unit is specifically configured to:

for each CSI-RS resource group, estimating the noise received by the terminal according to the third CSI-RS resource; and/or

And for each CSI-RS resource group, estimating an 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 N CSI-RS resources; or

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

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

Further, the CSI determining unit is specifically configured to:

and determining Channel State Information (CSI) of a transmission channel of a code word corresponding to the first CSI-RS resource according to the channel estimation value, the interference estimation value, the noise estimation value and/or the interference estimation values of other interferences aiming at each CSI-RS resource group.

Further, the receiving unit is further configured to:

acquiring indication information corresponding to the N CSI-RS resource groups, 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 of a codeword 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 of the codeword corresponding to the first CSI-RS resource according to the first CSI-RS resource;

estimating, according to the second indication information and the M-1 second CSI-RS resources, interference estimation values of interference of other M-1 other codewords received when the codeword corresponding to the first CSI-RS resource is received, where the second indication information is used to indicate that the terminal estimates, according to the M-1 second CSI-RS resources, interference estimation values of interference of other M-1 other codewords received when the codeword corresponding to the first CSI-RS resource is received;

estimating 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 interference estimation values 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 values 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 N CSI-RS resource groups; or

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

And receiving a physical downlink signaling sent by the network side equipment, wherein the physical downlink signaling comprises indication information corresponding to the N CSI-RS resource groups.

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.

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 assumed conditions and the N CSI-RS resource groups;

wherein the assumed conditions are as follows:

for each CSI-RS resource group, the terminal assumes that a code word corresponding to the first CSI-RS resource sent through a DMRS port group corresponding to the first CSI-RS resource uses a PMI/RI corresponding to the first CSI-RS resource and transmits the code word to the terminal through a transmission point corresponding to the DMRS port group;

for each CSI-RS resource group, the terminal assumes that the interference of other M-1 code words received when receiving the code word corresponding to the first CSI-RS resource is transmitted through DMRS port groups corresponding to other M-1 code words, and each layer of any one of the M-1 interference corresponds to one port of one second CSI-RS resource.

Further, the CSI determining unit is specifically configured to:

determining Channel State Information (CSI) of transmission channels corresponding to the N code words according to the N CSI-RS resource groups;

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

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

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

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

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 above methods.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the description of the embodiments will be briefly introduced below, and it is apparent that the drawings in the description below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings may be obtained according to the drawings without inventive labor.

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 schematic structural diagram of an apparatus for determining channel state information according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram of an electronic device according to an embodiment of the present invention;

fig. 9 is a flowchart illustrating a method for determining channel state information according to an embodiment of the present invention;

fig. 10 is a schematic structural diagram of an apparatus for determining channel state information according to an embodiment of the present invention;

fig. 11 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), 3G (UMTS, WCDMA), TD-SCDMA), 4G (e.g. FDD LTE, TDD LTE), and New RAT systems, such as 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 specific implementation, the transmission point may be a Base station (BTS) in a GSM system or a CDMA system, may also be a Base station (NodeB) in a WCDMA system, may also be an Evolved Node B (eNB or eNodeB) in an LTE system, or may also be a network device such as a Base station and a femto Base station 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 each cooperative TRP (Transmission/reception Point) or may be each 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 via 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 TRPs/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 the Case2-1, 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 N CSI-RS resource groups according to the measurement mode, and each resource group at least comprises one first CSI-RS resource and M-1 second CSI-RS resources;

step 303, the network side equipment sends CSI-RS signals to the terminal through the N CSI-RS resource groups;

step 304, the terminal sends CSI-RS signals to the terminal through the N CSI-RS resource groups;

and 305, the terminal determines CSI of the transmission channels corresponding to the M code words according to the CSI-RS signals carried by the N CSI-RS resource groups.

In step 301, when the network side device needs to configure a CSI-RS resource for the terminal, a CSI measurement mode is first obtained, in this embodiment of the present invention, the measurement mode is that the network side device uses M codewords to transmit through transmission points corresponding to M demodulation reference signal port groups DMRS port groups, where M is greater than or equal to 1, and each codeword corresponds to one DMRS port group.

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 use with the terminal side for transmission, 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 perform transmission according to the transmission mode.

In the embodiment of the invention, the assumed transmission mode of the network side device is that the network side transmits M code words to the terminal through transmission points corresponding to M DMRS port groups, and each DMRS port group corresponds to one code word.

In step 302, the network side device determines N CSI-RS resource groups according to the measurement manner, where the N CSI-RS resource groups are used by the terminal to determine channel state information CSI of transmission channels corresponding to M 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 less than or equal to N.

In the embodiment of the present invention, although it is determined that M codewords are used for transmission in the measurement mode, the network side device configures more than or equal to M CSI-RS resource groups, so that the terminal can report CSI of transmission channels corresponding to the M codewords according to the more than or equal to M CSI-RS resource groups, accuracy of reporting is ensured, and a plurality of methods for determining CSI are provided for the terminal.

Optionally, in the embodiment of the present invention, each CSI-RS resource group corresponds to one codeword, that is, N CSI-RS resource groups configured by the network side device correspond to N codewords.

Optionally, in the embodiment of the present invention, each CSI-RS resource group includes a first CSI-RS resource and M-1 second CSI-RS resources, where the first CSI-RS resource is used by the terminal to estimate a channel estimation value of a transmission channel of a codeword corresponding to the first CSI-RS resource, and the M-1 second CSI-RS resources are used by the terminal to estimate an interference estimation value of interference of other M-1 other codewords received when the codeword corresponding to the first CSI-RS resource is received.

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 for each CSI-RS resource group, where the third CSI-RS resource is used for 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.

In the embodiment of the present invention, the other interference refers to other interference except for an interference estimation value of interference of receiving M-1 codewords on codewords corresponding to the first CSI-RS resource, for example, in fig. 2, data that TRP1 sends to other terminals is other interference.

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 refers to the noise in mobile communication, and can be divided into internal noise and external noise, wherein the internal noise mainly refers to the 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, each CSI-RS Resource group is managed by N CSI-RS Resource sets (Resource sets), and the configuration information of the CSI-RS resources on the CSI-RS Resource sets (Resource sets) is configured by a CSI-RS measurement Resource parameter (Resource setting). Each CSI-RS resource group corresponds to one reporting feedback parameter.

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

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

for each CSI-RS resource group, the second indication information is used for indicating the terminal to estimate interference estimation values of interference of other M-1 other code words received when receiving the code words according to the M-1 second CSI-RS resources;

Optionally, in the embodiment of the present invention, the network side device adds the indication information corresponding to the N CSI-RS resource groups 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 N CSI-RS resource groups to the terminal includes:

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

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

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

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

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

Optionally, in the 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 N CSI-RS resource groups, or the terminal receives the CSI-RS signals sent to the terminal through the N CSI-RS resource groups and the CSI configuration information sent by the terminal receiving network side device, or the terminal receives the CSI-RS signals sent to the terminal through the N CSI-RS resource groups and the CSI-RS measurement resource parameters 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 N CSI-RS resource groups; or

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

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;

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

aiming at each CSI-RS resource group, the second indication information is used for indicating the terminal to estimate interference estimation values of interference of other M-1 other code words received when receiving the code words according to the M-1 second CSI-RS resources;

In step 305, the terminal may determine CSI of the transmission channels corresponding to the M codewords by receiving the CSI-RS signal carried on the CSI-RS resource, or may determine CSI of the transmission channels corresponding to the M codewords by receiving the CSI-RS signal carried on the CSI-RS resource and indication information corresponding to the CSI-RS resource, where the indication information corresponding to the CSI-RS resource is used to indicate that the terminal determines CSI of the transmission channels corresponding to the M codewords by using the CSI-RS signal carried on the CSI-RS resource.

In step 305, the terminal estimates a channel estimation value of a transmission channel of a codeword corresponding to the first CSI-RS resource according to the first CSI-RS resource; and the terminal estimates interference estimation values of the interference of other M-1 code words received when the code words corresponding to the first CSI-RS resources are received according to the M-1 second CSI-RS resources.

That is to say, in the embodiment of the present invention, when determining the CSI, the terminal considers a case where only the codeword corresponding to the first CSI-RS resource is transmitted and a case where other M-1 codewords are also transmitted when the codeword corresponding to the first CSI-RS resource is transmitted.

For example, in the embodiment of the present invention, M =3, that is, the network side determines that the measurement mode is to transmit three codewords, which are codeword 1, codeword 2, and codeword 3, the network side device determines 4 CSI-RS resource groups, where each CSI-RS resource group includes at least three resources, and the three resources include one first CSI-RS resource and two second CSI-RS resources, in the first CSI-RS resource group, codeword 1 corresponds to the first CSI-RS resource, codeword 2 corresponds to the first second CSI-RS resource, codeword 3 corresponds to the second CSI-RS resource, the terminal determines, according to the first CSI-RS resource, a channel estimation value of a transmission channel corresponding to codeword 1, when the terminal determines to receive codeword 1 according to the first second CSI-RS resource, interference of codeword 2 to codeword, and when the terminal determines to receive codeword 1 according to the second CSI-RS resource, interference of codeword 3 to codeword.

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, for each CSI-RS resource group, the terminal determines, according to the channel estimation value, the interference estimation value, the noise estimation value, and/or the interference estimation value of other interference, channel state information CSI of a transmission channel of a codeword corresponding to the first CSI-RS resource.

Similarly, in step 305, the terminal may determine the CSI of the transmission channel corresponding to the M codewords according to the N CSI-RS resource groups and the indication information corresponding to the N CSI-RS resource groups.

Optionally, in the embodiment of the present invention, the indication information corresponding to the CSI-RS resource may be sent to the terminal by the network side device, or may be obtained by the terminal itself.

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

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

Optionally, in the 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 codeword, and the terminal estimates, according to M-1 second CSI-RS resources, an interference estimation value of interference of other M-1 codewords received by the terminal when receiving the codeword corresponding to the first 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/CQI for each 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 the content or part of the content.

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 the terminal determines the CSI of the transmission channel corresponding to the M codewords according to the N CSI-RS resource groups, the following assumed conditions are included:

for each CSI-RS resource group, the terminal assumes that a code word corresponding to a first CSI-RS resource sent through a DMRS port group corresponding to the first CSI-RS resource uses a PMI/RI corresponding to the first CSI-RS resource and transmits the code word to the terminal through a transmission point corresponding to the DMRS port group;

for each CSI-RS resource group, the terminal assumes that the interference of other M-1 code words received when the code word corresponding to the first CSI-RS resource is received uses PMI/RI corresponding to M-1 second CSI-RS resources to be transmitted through DMRS port groups corresponding to other M-1 code words;

optionally, in this embodiment of the present invention, each layer of any one of the M-1 interferers corresponds to one port of one second CSI-RS resource.

That is to say, in the embodiment of the present invention, when determining CSI of transmission information corresponding to M codewords for any CSI-RS resource group, the terminal receives a codeword corresponding to a first CSI-RS resource in the CSI-RS resource group transmitted by a DMRS port group, where the codeword uses a PMI/RI corresponding to the first CSI-RS resource.

Optionally, in the embodiment of the present invention, for Case2-1, each codeword corresponds to one CSI-RS resource, so that the PMI/RI corresponding to each CSI-RS resource is also the PMI/RI corresponding to each codeword. In the embodiment of the invention, the corresponding PMI/RI of each code word is pre-stored in the terminal.

In the above embodiment of the present invention, the terminal assumes the situation as shown in fig. 2, that is, TRP1 sends a codeword to the terminal, and TRP2 sends a codeword to the terminal, then when the terminal receives codeword 1, the transmission of codeword 2 is the interference to codeword 1, and similarly, when the terminal receives codeword 2, the transmission of codeword 1 is the interference to codeword 2.

In the embodiment of the present invention, the terminal may estimate each layer of interference between codeword transmissions, and the terminal assumes that the interference between codewords corresponds to one port of the second CSI-RS resource during transmission. For example, when the terminal receives codeword 1, transmission of codeword 2 is interference to codeword 1, and codeword 2 uses PMI/RI corresponding to the second CSI-RS resource corresponding to codeword 2, and when codeword 2 is transmitted through a DMRS port group corresponding to the second CSI-RS resource, RI layers are transmitted, where each of the RI layers corresponds to a port of the second CSI-RS resource.

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

Optionally, in the embodiment of the present invention, the terminal determines, according to the N CSI-RS resource groups, channel state information CSI of transmission channels corresponding to the N codewords; the terminal reports Channel State Information (CSI) of transmission channels corresponding to the M code words;

or alternatively

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

That is to say, in the embodiment of the present invention, the terminal may select M CSI-RS resource groups from the N CSI-RS resource groups, where the M CSI-RS resource groups correspond to M codewords, and the terminal determines, according to the M CSI-RS resource groups, transmission channels CSI corresponding to the M codewords; or the terminal may determine the CSI of the transmission channels corresponding to the N codewords according to the N CSI-RS resource groups, and then select the CSI of the transmission channels corresponding to the M codewords to report.

To better explain a 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, a measurement manner is that a network side device uses 2 codewords to transmit through transmission points corresponding to 2 demodulation reference signal port groups DMRS port groups, where each codeword corresponds to one DMRS port group;

step 401, a network side device determines two CSI-RS resource groups according to a measurement mode, wherein the two CSI-RS resource groups are a first CSI-RS resource group and a second CSI-RS resource group respectively, each resource group includes resource 1, resource 2 and resource 3, and the determination processes of the two resource groups are consistent, so the first CSI-RS resource group is taken as an example in the embodiment of the present invention;

step 402, the network side device determines indication information corresponding to the first CSI-RS resource group, which specifically includes:

aiming at resource A1, estimating a TRP/panel A channel to a terminal;

for resource A2: for estimating the interference caused by the signal transmitted from TRP/panel A (codeword A) by the signal transmitted from TRP/panel B (codeword B);

for Resource A3: for estimating interference and noise;

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

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

step 405, a terminal receives two CSI-RS resource groups and CSI-RS configuration information sent by network side equipment;

step 406, the terminal estimates a channel H of TRPA from TRP/panel A to the terminal according to the Resource A1 and the first indication information corresponding to the Resource A1;

step 407, the terminal estimates Interference (Interference from TRP/panel B) caused by a signal (codeword B) transmitted from TRP/panel a to a signal (codeword a) transmitted from TRP/panel a according to resource a2 and second indication information corresponding to resource a 2;

step 408, the terminal estimates other interference and/or noise (I + N) according to resource a3 and the third indication information corresponding to resource a 3;

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

a signal (codeword A) transmitted via a DMRS port group A (corresponding to TRP/panel A) reaches a terminal through a channel (estimated by resource A1) from the TRP/panel A to the terminal by using PMI _ A/RI _ A corresponding to the codeword A;

each layer of interference from codeword B to codeword a (transmitted via DMRS port group B) corresponds to one port of Resource A2;

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

in step 410, the terminal feeds back PMI _ a/RI _ a/CQI _ a to the network side device.

In the embodiment of the present invention, the calculation processes are consistent for the second CSI-RS resource group, which is not described herein again.

In the embodiment of the present invention, the sequence of steps 406-408 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. 6, including:

step 601, a network side device determines a measurement mode of Channel State Information (CSI), wherein the measurement mode is that the network side device uses M code words to transmit through transmission points corresponding to M demodulation reference signal port groups (DMRS port groups), wherein M is greater than or equal to 1, and each code word corresponds to one DMRS port group;

step 602, a network side device determines N CSI-RS resource groups according to the measurement manner, where each CSI-RS resource group includes at least one first CSI-RS resource and M-1 second CSI-RS resources, the first CSI-RS resource is used for the terminal to estimate a channel estimation value of a transmission channel of a codeword corresponding to the first CSI-RS resource, the M-1 second CSI-RS resources are used for the terminal to estimate an interference estimation value of interference of other M-1 other codewords received when the terminal receives the codeword corresponding to the first CSI-RS resource, the transmission channel corresponding to the codeword is a transmission channel from a transmission point of the codeword to the terminal, where N is greater than or equal to M.

An embodiment of the present invention further provides a device for determining channel state information, as shown in fig. 7, including:

a measurement mode determining unit 701, configured to determine a measurement mode of channel state information CSI, where the measurement mode is that the network side device uses M codewords to transmit through transmission points corresponding to M demodulation reference signal port groups DMRS port groups, where M is greater than or equal to 1, and each codeword corresponds to one DMRS port group;

a CSI-RS resource group determining unit 702, configured to determine N CSI-RS resource groups according to the measurement manner, where each CSI-RS resource group includes at least one first CSI-RS resource and M-1 second CSI-RS resources, the first CSI-RS resource is used by the terminal to estimate a channel estimation value of a transmission channel of a codeword corresponding to the first CSI-RS resource, the M-1 second CSI-RS resources are used by the terminal to estimate an interference estimation value of interference of other M-1 other codewords received when the codeword corresponding to the first CSI-RS resource is received, the transmission channel corresponding to the codeword is a transmission channel from a transmission point of the codeword to the terminal, and N is greater than or equal to M.

An embodiment of the present invention further provides an electronic device, as shown in fig. 8, including:

the system comprises a processor 801, a memory 802, a transceiver 803 and a bus interface 804, wherein the processor 801, the memory 802 and the transceiver 803 are connected through the bus interface 804;

the processor 801 is configured to read the program in the memory 802, 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 M code words to transmit through transmission points corresponding to M demodulation reference signal port groups (DMRS port groups), M is greater than or equal to 1, and each code word corresponds to one DMRS port group;

determining N CSI-RS resource groups according to the measurement mode, wherein each CSI-RS resource group at least comprises a first CSI-RS resource and M-1 second CSI-RS resources, the first CSI-RS resource is used for the terminal to estimate a channel estimation value of a transmission channel of a code word corresponding to the first CSI-RS resource, the M-1 second CSI-RS resources are used for the terminal to estimate an interference estimation value of interference of other M-1 other code words received when the terminal receives the code word corresponding to the first CSI-RS resource, the transmission channel corresponding to the code word is a transmission channel from a transmission point of the code word to the terminal, and N is larger than or equal to M.

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. 9, including:

step 901, a terminal receives N CSI-RS resource groups sent by a network side device, where each CSI-RS resource group at least includes one first CSI-RS resource and M-1 second CSI-RS resources, and the CSI-RS resource group is determined by the network side device according to a measurement mode of channel state information CSI, where the measurement mode is that the network side device uses M codewords to transmit through transmission points corresponding to M demodulation reference signal port groups DMRS port groups, where M is greater than or equal to 1, and each codeword corresponds to one DMRS port group;

step 902, the terminal determines channel state information CSI of transmission channels corresponding to M codewords according to the N CSI-RS resource groups, where the M CSI-RS resource groups correspond to the M codewords, the transmission channels are transmission channels from a transmission point of the codeword to the terminal, and M is less than or equal to N.

An embodiment of the present invention further provides a device for determining channel state information, as shown in fig. 10, including:

a receiving unit 1001, configured to receive N CSI-RS resource groups sent by a network side device, where each CSI-RS resource group at least includes one first CSI-RS resource and M-1 second CSI-RS resources, and the CSI-RS resource group is determined by the network side device according to a measurement mode of channel state information CSI, where the measurement mode is that the network side device uses M codewords to transmit through transmission points corresponding to M demodulation reference signal port groups DMRS port groups, where M is greater than or equal to 1, and each codeword corresponds to one DMRS port group;

a CSI determining unit 1002, configured to determine, according to the N CSI-RS resource groups, channel state information CSI of transmission channels corresponding to M codewords, where the M CSI-RS resource groups correspond to the M codewords, the transmission channels are transmission channels from a transmission point of the codewords to a terminal, and M is less than or equal to N.

An embodiment of the present invention further provides an electronic device, as shown in fig. 11, including:

the device comprises a processor 1101, a memory 1102, a transceiver 1103 and a bus interface 1104, wherein the processor 1101, the memory 1102 and the transceiver 1103 are connected through the bus interface 1104;

the processor 1101 is configured to read the program in the memory 1102 and execute the following method:

receiving, by the transceiver 1103, N CSI-RS resource groups sent by a network-side device, where each CSI-RS resource group at least includes one first CSI-RS resource and M-1 second CSI-RS resources, and the CSI-RS resource group is determined by the network-side device according to a measurement mode of channel state information CSI, where the measurement mode is that the network-side device uses M codewords to transmit through transmission points corresponding to M demodulation reference signal port groups DMRS port groups, where M is greater than or equal to 1, and each codeword corresponds to one DMRS port group;

and determining Channel State Information (CSI) of transmission channels corresponding to M code words according to the N CSI-RS resource groups, wherein the M CSI-RS resource groups correspond to the M code words, the transmission channels are transmission channels from transmission points of the code words to a terminal, and M is less than or equal to N.

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

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:

the network side equipment determines N CSI-RS resource groups according to the measurement mode, each CSI-RS resource group at least comprises a first CSI-RS resource and M-1 second CSI-RS resources, the first CSI-RS resource is used for a terminal to estimate a channel estimation value of a transmission channel of a code word corresponding to the first CSI-RS resource, the M-1 second CSI-RS resources are used for the terminal to estimate an interference estimation value of interference of other M-1 other code words received when the terminal receives the code word corresponding to the first CSI-RS resource, the transmission channel corresponding to the code word is a transmission channel from a transmission point of the code word to the terminal, and N is larger than or equal to M.

2. The method of claim 1, wherein the set of CSI-RS resources further comprises a third CSI-RS resource used by the terminal to estimate noise received by the terminal; and/or

3. The method of claim 2, wherein after the network-side device determines N CSI-RS resource sets, the method further comprises:

4. The method of claim 3, wherein the sending, by the network-side device, the indication information corresponding to the N CSI-RS resource groups to the terminal includes:

5. The method of claim 4, wherein after the network-side device determines the N CSI-RS resource groups, the method further comprises:

the network side equipment determines CSI-RS configuration information for each CSI-RS resource group, the CSI-RS configuration information comprises a CSI-RS measurement resource parameter set and a reporting feedback parameter corresponding to the CSI-RS measurement resource parameter set, the CSI-RS measurement resource parameter set at least comprises indication information corresponding to one CSI-RS resource group, and the reporting feedback parameter is used for indicating the reporting content and the feedback mode of a terminal;

6. The method according to claim 3, wherein the indication information of each CSI-RS resource group comprises first indication information and/or second indication information and/or third indication information;

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

a terminal receives N CSI-RS resource groups sent by network side equipment, wherein each CSI-RS resource group at least comprises a first CSI-RS resource and M-1 second CSI-RS resources, the CSI-RS resource group is determined by the network side equipment according to a measurement mode of Channel State Information (CSI), the measurement mode is that the network side equipment uses M code words to transmit through transmission points corresponding to M demodulation reference signal port groups DMRS port groups, M is more than or equal to 1, and each code word corresponds to one DMRS port group;

the terminal determines Channel State Information (CSI) of transmission channels corresponding to M code words according to the N CSI-RS resource groups, wherein the transmission channels are transmission channels from transmission points of the code words to the terminal, and M is less than or equal to N; the method for determining the CSI of the transmission channel corresponding to the code word by the terminal according to the N CSI-RS resource groups includes the following steps: for each CSI-RS resource group, the terminal estimates a channel estimation value of a transmission channel of a code word corresponding to the first CSI-RS resource according to the first CSI-RS resource; and the terminal estimates interference estimation values of the interference of other M-1 code words received when receiving the code words corresponding to the first CSI-RS resource according to the M-1 second CSI-RS resources.

8. The method of claim 7, further comprising a third CSI-RS resource in each CSI-RS resource group, the method further comprising:

9. The method of claim 8, wherein the determining, by the terminal, the CSI of the transmission channels corresponding to the M codewords according to the N CSI-RS resource groups by the terminal comprises:

10. The method of claim 8, further comprising:

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

11. The method of claim 10, wherein the obtaining, by the terminal, indication information corresponding to the N CSI-RS resource groups comprises:

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

12. The method of claim 10, wherein the obtaining, by the terminal, indication information corresponding to the N CSI-RS resource groups comprises:

and the terminal determines the indication information corresponding to the N CSI-RS resource groups according to the received number of the CSI-RS resource groups and the binding relationship between the number of the CSI-RS resource groups and the indication information.

13. The method according to any of claims 7-12, wherein for each codeword, the CSI comprises a Precoding Matrix Indicator (PMI) corresponding to the 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.

14. The method of claim 13, wherein the determining, by the terminal, the CSI for the transmission channels corresponding to the M codewords according to the N CSI-RS resource groups by the terminal comprises:

wherein the assumed conditions are as follows:

15. The method of claim 7, wherein the determining, by the terminal, the CSI for the transmission channels corresponding to the M codewords according to the N CSI-RS resource groups by the terminal comprises:

and the terminal reports Channel State Information (CSI) of transmission channels corresponding to the M code words.

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

a measurement mode determining unit, configured to determine a measurement mode of channel state information CSI, where the measurement mode is that a network device uses M codewords to transmit through transmission points corresponding to M demodulation reference signal port groups DMRS port groups, where M is greater than or equal to 1, and each codeword corresponds to one DMRS port group;

and a CSI-RS resource group determining unit, configured to determine N CSI-RS resource groups according to the measurement manner, where each CSI-RS resource group includes at least one first CSI-RS resource and M-1 second CSI-RS resources, where the first CSI-RS resource is used by a terminal to estimate a channel estimation value of a transmission channel of a codeword corresponding to the first CSI-RS resource, the M-1 second CSI-RS resources are used by the terminal to estimate an interference estimation value of interference of other M-1 other codewords received when the codeword corresponding to the first CSI-RS resource is received, the transmission channel corresponding to the codeword is a transmission channel from a transmission point of the codeword to the terminal, and N is greater than or equal to M.

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

a CSI determining unit, configured to determine, according to the N CSI-RS resource groups, CSI of transmission channels corresponding to M codewords, where the M CSI-RS resource groups correspond to the M codewords, the transmission channels are transmission channels from transmission points of the codewords to a terminal, and M is less than or equal to N; the method for determining the CSI of the transmission channel corresponding to the code word by the terminal according to the N CSI-RS resource groups includes the following steps: for each CSI-RS resource group, the terminal estimates a channel estimation value of a transmission channel of a code word corresponding to the first CSI-RS resource according to the first CSI-RS resource; and the terminal estimates interference estimation values of the interference of other M-1 code words received when receiving the code words corresponding to the first CSI-RS resource according to the M-1 second CSI-RS resources.

18. An electronic device, comprising:

at least one processor; and (c) a second step of,

a memory communicatively coupled to the at least one processor; wherein, the first and the second end of the pipe are connected with each other,

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 1-6.

19. A non-transitory computer-readable storage medium storing computer instructions for causing a computer to perform the method of any one of claims 1-6.

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 cause the at least one processor to perform the method of any one of claims 7-15.

21. A non-transitory computer-readable storage medium storing computer instructions for causing a computer to perform the method of any one of claims 7-15.