CN114257359A

CN114257359A - CSI-RS measuring method and device

Info

Publication number: CN114257359A
Application number: CN202011018143.7A
Authority: CN
Inventors: 李全琼; 王丽萍; 肖鲜贵
Original assignee: Datang Mobile Communications Equipment Co Ltd
Current assignee: Datang Mobile Communications Equipment Co Ltd
Priority date: 2020-09-24
Filing date: 2020-09-24
Publication date: 2022-03-29
Anticipated expiration: 2040-09-24
Also published as: CN114257359B

Abstract

The embodiment of the application provides a CSI-RS measuring method and a device. The method is applied to the access network equipment, and comprises the following steps: determining a target square bit group corresponding to a resource indication CSI-RS of a target channel state information reference signal to be triggered; determining a target terminal of a target party group; the target party group corresponds to a target coverage range, and the target terminal is located in the target coverage range; and triggering the target terminal to measure the target CSI-RS. The embodiment of the application solves the problem that in the prior art, due to the limitation of the terminal capability, the MIMO performance is limited.

Description

CSI-RS measuring method and device

Technical Field

The present application relates to the field of mobile communications technologies, and in particular, to a CSI-RS measurement method and apparatus.

Background

In a Multiple Input Multiple Output (MIMO) system, Codebook shaping is a commonly used shaping technique, and a New Radio (NR) protocol is a protocol in which a MIMO Codebook (Codebook) design is enhanced, however, due to the limitation of processing capability of a terminal, a Codebook manner already supported in many protocols cannot be used. Since the number of users in a cell can reach the order of hundreds or even thousands, although a protocol-defined Channel State Information-Reference Signals (CSI-RS) is configured as a user-level parameter, if a set of CSI-RS resources with 4 ports is allocated to each user, this overhead amount cannot be borne by the base station. Therefore, codebook shaping schemes are usually implemented based on cell-level CSI-RS in the prior art.

The base station configures a CSI-RS at a cell level, the terminal measures parameters such as CSI-RS Resource Indication (CRI), Rank Indication (RI), Precoding Matrix Indication (PMI), Channel Quality Indication (CQI) and the like by adopting the CSI-RS, feeds corresponding information back to the base station, and the base station transmits the downlink MIMO by using the CSI-RS fed back by the terminal. However, due to the limitations of processing capability, power consumption and the like, the terminal has limited CSI measurement capability, and at present, the terminal with stronger processing capability supports CSI-RS (the sum of ports of all CSI-RS resources) with 16 ports at most; taking the example of supporting 8 ports, the terminal can support at most two sets of 8 ports, and 1 set of 16 ports. In the NR macro station system, the number of antennas is usually 32, 64 or more, but limited by the capability of the terminal, so that the CSI-RS beam design cannot fully exert the advantages of MIMO multiple antennas, thereby limiting the performance of MIMO.

Disclosure of Invention

The embodiment of the application provides a CSI-RS measurement method and a CSI-RS measurement device, which are used for solving the problem that in the prior art, due to the limitation of terminal capability, the MIMO performance is limited.

In one aspect, an embodiment of the present application provides a CSI-RS measurement method, which is applied to an access network device, and the method includes:

determining a target square bit group corresponding to a resource indication CSI-RS of a target channel state information reference signal to be triggered;

determining a target terminal of a target party group; the target party group corresponds to a target coverage range, and the target terminal is located in the target coverage range;

and triggering the target terminal to measure the target CSI-RS.

On the other hand, an embodiment of the present application further provides a CSI-RS measurement apparatus, which is applied to an access network device, and the apparatus includes:

the system comprises a bit group determining module, a bit group determining module and a triggering module, wherein the bit group determining module is used for determining a target bit group corresponding to a resource indication (CSI-RS) of a target channel state information reference signal to be triggered;

the terminal determining module is used for determining a target terminal of a target party group; the target party group corresponds to a target coverage range, and the target terminal is located in the target coverage range;

and the measurement triggering module is used for triggering the target terminal to measure the target CSI-RS.

In yet another aspect, an embodiment of the present application further provides an electronic device, which includes a memory, a processor, and a computer program stored on the memory and executable on the processor, and the processor implements the steps in the CSI-RS measurement method as described above when executing the computer program.

In still another aspect, an embodiment of the present application further provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps in the CSI-RS measurement method as described above.

In the embodiment of the application, a target party group corresponding to a target CSI-RS to be triggered is determined; determining a target terminal of a target party group; the target party group corresponds to a target coverage range, and the target terminal is located in the target coverage range; the target terminal is triggered to measure the target CSI-RS, only one set of aperiodic CSI resources can be configured for each terminal, the sum of ports of the CSI-RS resources cannot be increased along with the number of beams, the receiving capability of the terminal cannot limit the MIMO performance, and the multi-beam performance of the MIMO system can be fully exerted.

Drawings

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

Fig. 1 is a flowchart illustrating steps of a CSI-RS measurement method according to an embodiment of the present disclosure;

FIG. 2 is a flowchart of exemplary steps of an embodiment of the present application;

fig. 3 is a block diagram of a CSI-RS measurement apparatus according to an embodiment of the present disclosure;

fig. 4 is a block diagram of an electronic device according to an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments, 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 application.

It should be appreciated that reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment of the present application. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

In various embodiments of the present application, it should be understood that the sequence numbers of the following processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application. The terms first, second and the like in the description and in the claims, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application are capable of operation in sequences other than those illustrated or described herein. In addition, "and/or" in the specification and claims means at least one of connected objects, a character "/" generally means that a preceding and succeeding related objects are in an "or" relationship.

In the embodiments provided herein, it should be understood that "B corresponding to a" means that B is associated with a from which B can be determined. It should also be understood that determining B from a does not mean determining B from a alone, but may be determined from a and/or other information.

Fig. 1 shows a flowchart of a CSI-RS measurement method provided in an embodiment of the present application.

As shown in fig. 1, an embodiment of the present application provides a CSI-RS measurement method, where the method is applicable to an access network device, where the access network device may be a Base Station (BS), and the BS is a device deployed in an access network to provide a wireless communication function for a UE. The base stations may include various forms of macro base stations, micro base stations, relay stations, access points, and the like. In systems using different radio access technologies, the names of devices with base station functionality may differ, for example in a 5GNR system, called nodeb or gNB. The name "base station" may change as communication technology evolves. For convenience of description, in the embodiment of the present invention, the apparatus for providing the UE with the wireless communication function is collectively referred to as an access network device. For convenience of description, in the embodiment of the present application, the access network device is taken as a base station for explanation.

Step 101, determining a target square bit group corresponding to a resource indication CSI-RS of a target channel state information reference signal to be triggered.

In the NR MIMO system, the codebook is enhanced as follows in the protocol: the single CSI-RS resource port supports 1, 2, 4, 8, 12, 16, 24 and 32 ports, and the mode supporting single panel (single panel) and multi-panel (multi panel) of the codebook supports at most 192 CSI-RS resources; among them, the single panel supports different codebook modes and the like.

When a base station prepares to send a CSI-RS signal, determining a target party group corresponding to the target CSI-RS signal; different coverage areas of a cell are divided into different azimuth groups in advance on the base station side, and the antenna forms a beam with smaller granularity through the azimuth groups with horizontal dimension and vertical dimension. For example, in a 120-degree cell wide coverage scenario, users may be divided into 8 groups only in the horizontal direction without being grouped in the vertical direction, and each group covers 15 degrees, for a total of 8 beams; for high-rise scenes, there may be more azimuth groups in the vertical direction and fewer horizontal beams, e.g., every 6 degrees group vertically (a total of 4 groups), 60 degrees horizontal groups (a total of 2 groups), and 8 beams in total. Therefore, the cell coverage area is divided into at least two intervals, all terminals in each interval are used as a square bit group, when the target CSI-RS is triggered, the target square bit group of the coverage area is determined according to the coverage area corresponding to the target CSI-RS, and then the terminals in the target square bit group are determined. If the number of users in some coverage ranges is large, the CSI-RS transmission in the direction and the CSI-RS measurement of the corresponding terminal can be triggered for many times, and the CSI-RS transmission in the direction and the CSI-RS measurement of the corresponding terminal can be triggered for many times in a plurality of azimuth groups.

The CSI-RS in the embodiment of the application is an aperiodic CSI-RS. Specifically, in the time domain, the CSI-RS may be configured to be transmitted periodically, semi-continuously, or aperiodically. For periodic transmission, the CSI-RS is repeated every 4 slots at minimum, and 640 slots at maximum. For semi-persistent transmission, the CSI-RS also configures a transmission period, and whether real transmission depends on explicit activation of a Media Access Control (MAC) Control source, and once activated, the CSI-RS continues to transmit periodically until receiving an explicit deactivation command. For aperiodic transmission, the network side does not configure a transmission period, but explicitly notifies each CSI-RS transmission through signaling.

Step 102, determining a target terminal of a target party group; the target party group corresponds to a target coverage range, and the target terminal is located in the target coverage range;

after determining the target party group corresponding to the target CSI-RS signal, the base station further determines the terminal in the target party group, and optionally, the base station may determine the location information of the terminal according to the azimuth information of the terminal, and further determine the target terminal in the target party group.

And 103, triggering the target terminal to measure the target CSI-RS.

After a target terminal in a target party group is determined, the target terminal is triggered to measure a target CSI-RS (channel state information-reference signal), namely all terminals in the target party group are triggered to measure the CSI-RS according to the target CSI-RS. Thus, when the base station determines that the target party group of the target CSI-RS has the terminal user, the measurement of the aperiodic CSI-RS of the group of users is triggered; for each CSI-RS resource, each CSI-RS resource is used by not only one terminal but a group of terminals so as to save the CSI-RS resource; meanwhile, the loss caused by insufficient beam number and insufficient beam fineness of the cell-level CSI-RS due to the terminal capability is avoided.

Specifically, for example, by supporting 8 ports, in the prior art, a terminal supports at most two sets of 8 ports, that is, two CSI beams, so that the performance of a large-scale MIMO system multi-beam cannot be exerted, and the downlink rate cannot be higher. And more CSI beams are arranged, so that the advantages on RI and PMI are better. In the embodiment of the application, each terminal only needs to configure one aperiodic CSI-RS resource so as to avoid being limited by the capability of the terminal, and the number of CSI-RS beams of the base station can be N (N can be 12 or more), which is sufficient to match the beam requirements of MIMO multiple antennas. Only one set of aperiodic CSI resources is configured for each terminal, and when the terminal is positioned at different positions, CSI-RS measurement of the user is triggered through a CSI-RS wave beam corresponding to a position group to which the user belongs, so that the CSI wave beam can be fine enough; when the aperiodic CSI resource comprises N beams, the total number of ports is only the number of ports of the aperiodic CSI resource, but not the number of ports of N-CSI for a terminal; the number of ports does not increase with the number of beams, and therefore, the performance of MIMO is not limited by the total number of ports in the terminal reception capability, and the multi-beam performance of the MIMO system can be fully exerted.

In the embodiment of the application, a target party group corresponding to a target CSI-RS to be triggered is determined; determining a target terminal of a target party group; the target party group corresponds to a target coverage range, and the target terminal is located in the target coverage range; the target terminal is triggered to measure the target CSI-RS, only one set of aperiodic CSI resources can be configured for each terminal, the sum of ports of the CSI-RS resources cannot be increased along with the number of beams, the receiving capability of the terminal cannot limit the MIMO performance, and the multi-beam performance of the MIMO system can be fully exerted. The embodiment of the application solves the problem that in the prior art, due to the limitation of the terminal capability, the MIMO performance is limited.

In an optional embodiment, the determining the target terminal of the target party group includes:

acquiring an uplink channel Sounding Reference Signal (SRS) sent by a terminal;

determining a first coverage range corresponding to the terminal according to the SRS;

and determining the first coverage range as a target terminal of the target coverage range.

And periodically reporting a Sounding Reference Signal (SRS) to the base station by the terminal, wherein the SRS is used for the base station to estimate uplink channel information and perform downlink beam forming. When the terminal accesses to a cell of the base station in a random access or cell switching mode, the terminal periodically reports the SRS to the base station, the base station uses the SRS as an estimation and channel selection of the uplink channel quality, and calculates a Signal to Interference plus Noise Ratio (SINR) of the uplink channel. In the embodiment of the application, the base station determines the spatial orientation of the terminal according to the SRS, wherein the spatial orientation is a first coverage area to which each terminal belongs; after the first coverage range of each terminal is determined, the terminal with the first coverage range as the target coverage range is selected as the target terminal.

In the embodiment of the application, in the process of determining the first coverage range corresponding to the terminal, whether the SRS is transmitted in turn and the number of ports are not limited, the SRS resource does not need to be configured additionally, the existing SRS resource is utilized, and the transmitting capability of the SRS of the terminal is not limited in the process of beam forming.

In an optional embodiment, the determining, according to the SRS, a first coverage corresponding to the terminal includes:

determining a direction angle of the terminal according to the SRS; the angle of arrival refers to a measure of the direction of propagation of the wave radiation to the observation point, i.e. the angle between the wave ray and the preset positive direction. The Azimuth angle comprises at least one Of an Azimuth Of Deviation (AOD) and a vertical Of arrival (ZOD); in the process of calculating the arrival angle, an angle power spectrum can be calculated by using an array response vector of an antenna array and a channel estimation correlation matrix, and the position with the maximum angle power spectrum is selected as the angle of the terminal; wherein the channel estimation correlation matrix can be calculated by the SRS.

Determining a coverage range corresponding to the direction angle according to a preset corresponding relation, wherein the coverage range is a first coverage range corresponding to the terminal; the corresponding relation comprises at least two coverage ranges, and each coverage range corresponds to a continuous direction angle range. For example, each beam corresponds to a horizontal coverage range [ a, b ], and if the terminal AOA is between [ a, b ], the first coverage range of the terminal is the coverage range of the beam.

The coverage may be a one-dimensional planar coverage, such as a horizontal coverage or a vertical coverage, dividing a coverage space into a plurality of coverage in a horizontal plane or a vertical plane; the coverage may also be two-dimensional spatial coverage, for example, each beam corresponds to a horizontal coverage [ a, b ] and a vertical coverage [ c, d ], and if the terminal AOA is between [ a, b ] and ZOD is in [ c, d ], the terminal belongs to the beam, and the first coverage of the terminal is the coverage of the beam.

In an optional embodiment, after the triggering the target terminal to measure the target CSI-RS, the method includes:

receiving CSI measurement information reported by the target terminal;

determining a first precoding PMI matrix of the target terminal according to the CSI measurement information; determining a second PMI matrix corresponding to the target CSI-RS;

and determining the product of the first PMI matrix and the second PMI matrix as a downlink transmission matrix of the target terminal.

The CSI measurement information includes cqi (channel Quality Indicator), PMI, Precoding Type Indicator (PTI), RI, and the like.

Optionally, the downlink RI and the downlink PMI may be CSI measurement information directly reported by the terminal, or may be parameters corrected by the base station according to the CSI measurement information, for example, the base station calculates downlink spectrum efficiency by combining the RI and the CQI reported by the terminal; if the spectrum efficiency is too low, adjusting the RI downwards;

or, obtaining a first horizontal direction Arrival Angle X of the terminal by using the PMI reported by the terminal, calculating an Arrival Angle of Arrival (AOA) according to the SRS, correcting the X according to the AOA to obtain a corrected second horizontal direction Arrival Angle X2, and calculating a PMI1 as a new PMI matrix reversely according to X2.

When the target party group has a terminal, the base station can trigger the terminal to report the aperiodic CSI-RS by adopting Downlink Control Information (DCI), and the base station carries measurement report indication Information of the aperiodic CSI-RS and Zero Power reference signals (Zero Power Csi-Rs, ZP) corresponding to all scheduling terminals at the moment in the DCI; specifically, if a Physical direct Channel (PSDCH) scheduled for one terminal includes CSI-RS resource elements configured for other terminals, the terminal needs to skip the CSI-RS resource elements. But the terminal does not know which resource elements it needs to skip, and the zero-power CSI-RS is used to mark all resource elements that the terminal needs to skip as zero-power CSI-RS, and the terminal will consider these resource elements as invalid and skip directly without any processing.

After a target terminal of a target party group is triggered to perform CSI measurement, a base station receives CSI measurement information reported by the target terminal; determining a first precoding PMI matrix omega 1 of the target terminal according to the CSI measurement information; determining a second PMI matrix omega 2 corresponding to the target CSI-RS; and then determining a product of the first PMI matrix omega 1 and the second PMI matrix omega 2 as a downlink transmission matrix of the target terminal, wherein the downlink transmission matrix is used for transmitting downlink service data, and realizing adjustment of parameters of a basic unit of the phase array, so that signals at certain angles obtain constructive interference, signals at other angles obtain destructive interference, and beam forming is completed.

Optionally, the method further comprises:

and detecting an access terminal accessed into the coverage range of the access network equipment, and configuring an aperiodic CSI-RS and a zero-power reference signal ZP corresponding to the aperiodic CSI-RS for the access terminal.

When a terminal is accessed to a cell of a base station in a random access or cell switching mode, the base station detects the terminal access and configures an aperiodic CSI-RS and a zero-power reference signal ZP corresponding to the aperiodic CSI-RS for the terminal; the number of the aperiodic CSI-RS resources can be one or more, and only needs to be within the UE capacity range; for example, if the maximum port number supported by the terminal is 16, when the base station configures a high-level signaling for the terminal, the total port number of each configured CSI resource does not exceed 16, for example, two sets of CSI resources with 8 ports may be configured in each configuration, or only one set of CSI resources with 8 ports may be configured; each CSI resource corresponds to a beam, and the number of resources in each configuration can determine the number of beams that can trigger aperiodic measurement this time, that is, the number of groups of target party groups.

That is, the number of groups of target party groups, i.e., aperiodic CSI resources, includes the number of beams; the number of the wave beams can be determined according to the number of antennas, array types, actual CSI-RS ports and the like of the base station; for example, the horizontal coverage and the vertical coverage of each CSI beam are determined according to the antenna spacing of the base station, the pattern of the array and the number of ports of the CSI, and then the number of CSI resources that can be included is determined according to the coverage. Optionally, the number of beams is approximately equal to the total three-dimensional space coverage of the base station divided by the three-dimensional space coverage of each beam.

By way of example, referring to fig. 2, fig. 2 shows an application process of the CSI-RS measurement method provided in the embodiment of the present application, which mainly includes the following steps:

step 201, when the terminal is accessed, the base station configures the aperiodic CSI-RS for the terminal.

When the terminal is accessed, the base station configures a set of aperiodic CSI-RS and aperiodic ZP corresponding to the CSI-RS resource for the terminal.

In step 202, the terminal transmits an SRS to the base station.

And step 203, the base station determines parameters such as AOD, ZOD and the like according to the SRS.

And the base station utilizes the uplink SRS to measure the AOD and ZOD of the uplink.

Step 204, determining the side group to which the terminal belongs.

And determining the orientation group of the terminal according to the AOD and the ZOD.

Step 205, triggering the reporting of the aperiodic CSI.

And triggering all terminals in the target party group, and carrying out CSI-RS measurement according to the target CSI-RS.

Step 206, determining downlink RI, PMI and CSI wave beams of the user;

step 207, calculating a downlink weight;

the downlink weight value is an element in a downlink sending matrix; determining a first PMI matrix omega 1 of a terminal and determining a second PMI matrix omega 2 corresponding to a target CSI-RS; and then determining the product of the first PMI matrix ω 1 and the second PMI matrix ω 2 as a downlink transmission matrix of the target terminal.

And step 208, sending the data in a downlink mode.

And sending downlink service data according to the downlink matrix.

Step 209, downlink reception of the terminal;

specifically, step 205 includes steps 210 to 213.

Step 210, the base station performs scheduling;

step 211, if the location group has an end user.

Step 212, triggering all users in the local group to perform aperiodic CSI reporting and ZP of all other scheduling users in the local slot (slot).

In step 213, the terminal performs aperiodic CSI measurement.

In this example, under the condition that the terminal capability is limited, a codebook enhancement scheme is provided, and the base station measures and selects the MIMO beam used by the terminal, so as to improve the performance of downlink MIMO.

The CSI-RS measurement method provided by the embodiment of the present application is described above, and a CSI-RS measurement apparatus provided by the embodiment of the present application is described below with reference to the accompanying drawings.

Referring to fig. 3, an embodiment of the present application further provides a CSI-RS measurement apparatus, which is applied to an access network device, where the access network device may be a base station, and the base station is an apparatus deployed in an access network to provide a wireless communication function for a UE. The base stations may include various forms of macro base stations, micro base stations, relay stations, access points, and the like. In systems using different radio access technologies, the names of devices with base station functionality may differ, for example in a 5G NR system, called nodeb or gNB. The name "base station" may change as communication technology evolves. For convenience of description, in the embodiment of the present invention, the apparatus for providing the UE with the wireless communication function is collectively referred to as an access network device. For convenience of description, in the embodiment of the present application, the access network device is taken as a base station for explanation.

The device comprises:

a bit set determining module 301, configured to determine a target bit set corresponding to a resource indicator CSI-RS of a target channel state information reference signal to be triggered.

When a base station prepares to send a CSI-RS signal, determining a target party group corresponding to the target CSI-RS signal; different coverage areas of a cell are divided into different azimuth groups in advance on the base station side, and the antenna forms a beam with smaller granularity through the azimuth groups with horizontal dimension and vertical dimension. For example, in a cell wide coverage scenario of 120 degrees, the users may be divided into 8 groups only in the horizontal direction instead of the vertical direction, and each group covers 15 degrees, for a total of 8 beams; for high-rise scenes, there may be more azimuth groups in the vertical direction and fewer horizontal beams, e.g., every 6 degrees group vertically (a total of 4 groups), 60 degrees horizontal groups (a total of 2 groups), and 8 beams in total. Therefore, the cell coverage area is divided into at least two intervals, all terminals in each interval are used as a square bit group, when the target CSI-RS is triggered, the target square bit group of the coverage area is determined according to the coverage area corresponding to the target CSI-RS, and then the terminals in the target square bit group are determined.

The CSI-RS in the embodiment of the application is an aperiodic CSI-RS. Specifically, in the time domain, the CSI-RS may be configured to be transmitted periodically, semi-continuously, or aperiodically. For periodic transmission, the CSI-RS is repeated every 4 slots at minimum, and 640 slots at maximum. For semi-persistent transmission, the CSI-RS configures a transmission period, whether the transmission is really performed or not depends on explicit activation of a MAC layer control source, and once the transmission is activated, the periodic transmission is continued until an explicit deactivation command is received. For aperiodic transmission, the network side does not configure a transmission period, but explicitly notifies each CSI-RS transmission through signaling.

A terminal determining module 302, configured to determine a target terminal of a target party group; the target party group corresponds to a target coverage range, and the target terminal is located in the target coverage range.

And a measurement triggering module 303, configured to trigger the target terminal to measure the target CSI-RS.

In this embodiment of the present application, the position group determining module 301 determines a target position group corresponding to a target CSI-RS to be triggered; the terminal determining module 302 determines a target terminal of a target party group; the target party group corresponds to a target coverage range, and the target terminal is located in the target coverage range; the measurement triggering module 303 triggers the target terminal to measure the target CSI-RS, and only one set of aperiodic CSI resource may be configured for each terminal, the sum of ports of the CSI-RS resources may not increase with the number of beams, the receiving capability of the terminal may not limit the MIMO performance, and the multi-beam performance of the MIMO system may be fully exerted. The embodiment of the application solves the problem that in the prior art, due to the limitation of the terminal capability, the MIMO performance is limited.

Optionally, in this embodiment of the present application, the terminal determining module 302 includes:

the acquisition submodule is used for acquiring an uplink channel Sounding Reference Signal (SRS) sent by a terminal;

the range determining submodule is used for determining a first coverage range corresponding to the terminal according to the SRS;

and the terminal determining submodule is used for determining the target terminal with the first coverage range as the target coverage range.

Optionally, in an embodiment of the present application, the range determining submodule is configured to:

determining a direction angle of the terminal according to the SRS; the azimuth angle comprises at least one of a horizontal direction arrival angle AOD and a vertical direction arrival angle ZOD;

determining a coverage range corresponding to the direction angle according to a preset corresponding relation, wherein the coverage range is a first coverage range corresponding to the terminal; the corresponding relation comprises at least two coverage ranges, and each coverage range corresponds to a continuous direction angle range.

Optionally, in an embodiment of the present application, the apparatus includes:

the information receiving module is used for receiving the CSI measurement information reported by the target terminal;

a first matrix determining module, configured to determine a first precoding PMI matrix of the target terminal according to the CSI measurement information; determining a second PMI matrix corresponding to the target CSI-RS;

and a second matrix determining module, configured to determine a product of the first PMI matrix and the second PMI matrix as a downlink transmission matrix of the target terminal.

Optionally, in an embodiment of the present application, the apparatus further includes:

and the configuration module is used for detecting an access terminal accessed into the coverage range of the access network equipment and configuring the aperiodic CSI-RS and a zero power reference signal ZP corresponding to the aperiodic CSI-RS for the access terminal.

The CSI-RS measurement apparatus provided in this embodiment of the present application can implement each process implemented by the base station side in the method embodiments in fig. 1 to fig. 2, and is not described here again to avoid repetition.

In this embodiment of the present application, the position group determining module 301 determines a target position group corresponding to a target CSI-RS to be triggered; the terminal determining module 302 determines a target terminal of a target party group; the target party group corresponds to a target coverage range, and the target terminal is located in the target coverage range; the measurement triggering module 303 triggers the target terminal to measure the target CSI-RS, and only one set of aperiodic CSI resource may be configured for each terminal, the sum of ports of the CSI-RS resources may not increase with the number of beams, the receiving capability of the terminal may not limit the MIMO performance, and the multi-beam performance of the MIMO system may be fully exerted.

On the other hand, the embodiment of the present application further provides an electronic device, which includes a memory, a processor, a bus, and a computer program stored on the memory and executable on the processor, and the processor implements the steps in the CSI-RS measurement method when executing the program.

For example, fig. 4 shows a schematic physical structure diagram of an electronic device.

As shown in fig. 4, the electronic device may include: a processor (processor)410, a communication Interface 420, a memory (memory)430 and a communication bus 440, wherein the processor 410, the communication Interface 420 and the memory 430 are communicated with each other via the communication bus 440. The processor 410 may call logic instructions in the memory 430 to perform the following method:

and triggering the target terminal to measure the target CSI-RS.

In addition, the logic instructions in the memory 430 may be implemented in the form of software functional units and stored in a computer readable storage medium when the software functional units are sold or used as independent products. Based on such understanding, the technical solution of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.

In another aspect, an embodiment of the present application further provides a computer-readable storage medium, on which a computer program is stored, where the computer program is implemented to, when executed by a processor, perform the CSI-RS measurement method provided in the foregoing embodiments, for example, including:

and triggering the target terminal to measure the target CSI-RS.

The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.

Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.

Claims

1. A CSI-RS measurement method is applied to access network equipment, and is characterized in that the method comprises the following steps:

and triggering the target terminal to measure the target CSI-RS.

2. The CSI-RS measurement method of claim 1, wherein the determining the target terminal of the target party group comprises:

acquiring an uplink channel Sounding Reference Signal (SRS) sent by a terminal;

3. The CSI-RS measuring method according to claim 2, wherein the determining the first coverage corresponding to the terminal according to the SRS comprises:

4. The CSI-RS measurement method according to claim 1, wherein after the triggering the target terminal to measure a target CSI-RS, the method comprises:

receiving CSI measurement information reported by the target terminal;

5. The CSI-RS measurement method of claim 1, wherein the method further comprises:

6. A CSI-RS measuring device applied to an access network device is characterized in that the device comprises:

7. The CSI-RS measurement apparatus according to claim 6, wherein the terminal determining module comprises:

8. The CSI-RS measurement apparatus of claim 7, wherein the range determination submodule is configured to:

9. The CSI-RS measurement apparatus according to claim 6, wherein the apparatus comprises:

10. The CSI-RS measurement apparatus according to claim 6, wherein the apparatus further comprises:

11. An electronic device comprising a processor, a memory and a computer program stored on the memory and executable on the processor, characterized in that the computer program, when executed by the processor, implements the steps of the CSI-RS measurement method according to any of claims 1 to 5.

12. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the CSI-RS measurement method according to any one of claims 1 to 5.