WO2023030032A1 - Method and apparatus for acquiring channel state information - Google Patents

Abstract

Provided in the present application are a method and apparatus for acquiring channel state information. The method comprises: a network device sending configuration information to a terminal device, wherein the configuration information is used for indicating a plurality of reference signal resources corresponding to one piece of channel state information, the plurality of reference signal resources comprise at least one first reference signal resource and a plurality of second reference signal resources, the first reference signal resource is used for channel measurement, and the second reference signal resources are zero power reference signal resources, which are used for interference measurement; and receiving the channel state information from the terminal device. Therefore, the resource overheads of reference signal resources can be reduced, and a data transmission throughput can be increased.

Description

Method and device for acquiring channel state information

This application claims the priority of the Chinese patent application filed with the State Intellectual Property Office of China on August 31, 2021, with the application number 202111015837.X and the application name "Method and Device for Obtaining Channel State Information", the entire contents of which are incorporated by reference incorporated in this application.

technical field

The present application relates to the field of communications, and more specifically, to a method and device for acquiring channel state information.

Background technique

In the communication system, the multi-transmission point coordination method can be used to realize the cooperation of multiple transmission nodes to complete the data transmission of the same terminal device. The multi-transmission point cooperative transmission method can improve the data transmission rate of the cell edge terminal device and the data transmission throughput of the network. .

Before multi-transmission point cooperative data transmission, the network device configures corresponding reference signal resources for the terminal device, so that the terminal device can estimate the channel state information (channel state information, CSI) during multi-transmission point cooperative transmission based on the measurement reference signal resource. ), and report to the network device. The network device can implement link adaptation based on the CSI, and improve the reliability of multi-transmission point cooperation for data transmission.

However, the transmission point sets corresponding to different terminal devices connected to the same network device may be different, and the network device needs to configure corresponding reference signal resources for the transmission point sets corresponding to the terminal devices, and there is a problem of large reference signal resource overhead.

Contents of the invention

The present application provides a method and device for acquiring channel state information, which can reduce resource overhead of reference signal resources and improve data transmission throughput.

In a first aspect, a method for acquiring channel information is provided, and the method may be executed by a network device or a module (such as a chip) configured on (or used for) the network device.

The method includes: sending configuration information to a terminal device, where the configuration information is used to indicate a plurality of reference signal resources corresponding to one piece of channel state information, and the plurality of reference signal resources include at least one first reference signal resource and a plurality of second reference signal resources resources, the first reference signal resource is used for channel measurement, and the second reference signal resource is a zero-power reference signal resource used for interference measurement; receiving the channel state information from the terminal device.

As an example without limitation, the zero-power reference signal resource is a resource in which the serving transmission point (or serving cell) of the terminal device does not send signals.

According to the above solution, the network device configures the terminal device with the first reference signal resource and multiple zero-power reference signal resources (that is, the second reference signal resource) for obtaining channel information, which can reduce the number of reference signal resources in the wireless resources of the network. Overhead, improve data transfer throughput.

With reference to the first aspect, in some implementation manners of the first aspect, the at least one first reference signal resource is used to carry a reference signal of at least one first transmission point, and the first transmission point is a serving transmission point of the terminal device .

With reference to the first aspect, in some implementation manners of the first aspect, the multiple second reference signal resources are used to bear reference signals of multiple second transmission points, and the multiple second transmission points are the terminal device and the An interfering transmission point communicated by the first transmission point.

According to the above solution, the network configures the resources corresponding to the transmission point from the perspective of the transmission point, and the network device configures the reference signal resources corresponding to the transmission point for channel measurement through configuration information according to whether the transmission point is a serving transmission point or an interference transmission point of the terminal device Or reference signal resources for interference measurement. The implementation complexity and the overhead of reference signal resources in network radio resources can be reduced. Thereby improving data transmission throughput.

With reference to the first aspect, in some implementation manners of the first aspect, the multiple reference signal resources further include at least one third reference signal resource, and the at least one third reference signal resource is used for interference measurement in the serving cell, the At least one third reference signal resource is a non-zero power reference signal resource.

With reference to the first aspect, in some implementation manners of the first aspect, the at least one first reference signal resource is used to carry a reference signal of at least one first transmission point, and the first transmission point is a serving transmission point of the terminal device , the multiple second reference signal resources include N second reference signal resources for measuring intra-site interference, and the second transmission point corresponding to the N second reference signal resources belongs to one or more of the first transmission points For the same network device, N is a positive integer, and/or, the multiple second reference signal resources include M second reference signal resources used to measure inter-station interference, and the M second reference signal resources correspond to the second The transmission point and the one or more first transmission points belong to different network devices, and M is a positive integer.

In a second aspect, a method for acquiring channel information is provided, and the method may be executed by a terminal device or a module (such as a chip) configured (or used) in the terminal device.

The method includes: receiving configuration information from a network device, where the configuration information is used to indicate a plurality of reference signal resources corresponding to one piece of channel state information, and the plurality of reference signal resources include at least one first reference signal resource and a plurality of second reference signal resources Signal resources, the first reference signal resource is used for channel measurement, and the second reference signal resource is a zero-power reference signal resource used for interference measurement; sending the channel state information to the network device.

With reference to the second aspect, in some implementations of the second aspect, the method further includes: determining the channel state information according to channel information and first interference information, where the channel information is obtained by measuring the at least one first reference signal resource Yes, the first interference information is obtained by measuring the multiple second reference signal resources.

With reference to the second aspect, in some implementations of the second aspect, the method further includes: measuring the plurality of second reference signal resources to obtain a plurality of interference covariance information; according to the plurality of interference covariance information, determining the first 1. Interference information.

With reference to the second aspect, in some implementations of the second aspect, the at least one first reference signal resource is used to carry a reference signal of at least one first transmission point, where the first transmission point is a serving transmission point of the terminal device .

With reference to the second aspect, in some implementations of the second aspect, the plurality of reference signal resources further include at least one third reference signal resource, and the at least one third reference signal resource is used for interference measurement in the serving cell, the At least one third reference signal resource is a non-zero power reference signal resource.

With reference to the second aspect, in some implementation manners of the second aspect, the multiple second reference signal resources are used to bear reference signals of multiple second transmission points, and the multiple second transmission points are the terminal device and the An interfering transmission point communicated by the first transmission point.

With reference to the second aspect, in some implementations of the second aspect, the at least one first reference signal resource is used to carry a reference signal of at least one first transmission point, where the first transmission point is a serving transmission point of the terminal device , the multiple second reference signal resources include N second reference signal resources for measuring intra-site interference, and the second transmission point corresponding to the N second reference signal resources belongs to one or more of the first transmission points The same access network device, N is a positive integer, and/or, the multiple second reference signal resources include M second reference signal resources used to measure inter-station interference, and the M second reference signal resources correspond to the The second transmission point does not belong to the same access network device as the one or more first transmission points, and M is a positive integer.

In a third aspect, a method for acquiring channel information is provided, and the method may be executed by a terminal device or a module (such as a chip) configured (or used) in the terminal device.

The method includes: receiving control information, the control information is used to schedule the physical downlink shared channel PDSCH, the control information includes first indication information, and the first indication information is used to indicate the first DMRS port in the demodulation reference signal DMRS port set , the first DMRS port is the DMRS port corresponding to the PDSCH; sending channel state information, the channel state information is determined according to the first DMRS port and the second DMRS port, wherein the first DMRS port is used for channel measurement, the second The second DMRS is used for interference measurement, and the second DMRS port belongs to the DMRS port set.

In combination with the third aspect, in some implementations of the third aspect, the method further includes:

Measure the first DMRS port to obtain first measurement information, where the first measurement information includes channel information and interference information;

The second DMRS port is measured to obtain second measurement information, where the second measurement information includes interference information.

Obtain channel information according to the first measurement information and the second measurement information,

Wherein, the channel state information is specifically determined according to the channel information and the interference information.

With reference to the third aspect, in some implementations of the third aspect, the second DMRS port includes a third DMRS port, and the third DMRS port is used for intra-cell interference measurement, and,

The measurement of the second DMRS port obtains second measurement information, including:

Measure the third DMRS port to obtain third measurement information, where the third measurement information includes inter-cell interference information and intra-cell interference information;

Measuring ports other than the third DMRS port in the second DMRS port to obtain fourth measurement information, the fourth measurement information, the fourth measurement information includes the inter-cell interference information;

Wherein, the second measurement information includes the third measurement information and the fourth measurement information.

In combination with the third aspect, in some implementations of the third aspect, the method further includes:

Obtain interference information in the cell according to the third measurement information and the fourth measurement information;

Wherein, the channel state information is specifically determined according to the channel information, the inter-cell interference information, and the intra-cell interference information.

In combination with the third aspect, in some implementations of the third aspect, the method further includes:

Measure zero-power reference signal resources to obtain inter-cell interference information;

Obtain intra-cell interference information according to the second measurement information and the inter-cell interference information, where the second measurement information specifically includes intra-cell interference information and inter-cell interference information,

Wherein, the channel state information is specifically determined according to the channel information, the inter-cell interference information, and the intra-cell interference information.

In combination with the third aspect, in some implementations of the third aspect, the method further includes:

Measure the first DMRS port to obtain first measurement information, where the first measurement information includes channel information and interference information;

Measure the second DMRS port to obtain second measurement information, where the second measurement information includes intra-cell interference information;

Measure zero-power reference signal resources to obtain inter-cell interference information,

Wherein, the channel state information is specifically determined according to the channel information, the inter-cell interference information, and the intra-cell interference information.

In the fourth aspect, a method for acquiring channel information is provided, and the method may be performed by the first cell, or by a transmission point corresponding to the first cell, or by a transmission point configured in (or used for) the first cell Modules (such as chips) execute. In the following, the method for obtaining channel information is performed by the first cell as an example for description.

The method includes: the first cell sends control information to the terminal device, the control information is used to schedule the Physical Downlink Shared Channel PDSCH, the control information includes first indication information, and the first indication information is used to indicate a demodulation reference signal DMRS port set The first DMRS port in the first DMRS port is the DMRS port corresponding to the PDSCH;

The first cell receives channel state information from the terminal device, the channel state information is determined according to the first DMRS port and the second DMRS port, wherein the first DMRS port is used for channel measurement, and the second DMRS is used for interference It is measured that the second DMRS port belongs to the DMRS port set.

With reference to the fourth aspect, in some implementations of the fourth aspect, the second DMRS port includes a third DMRS port, and the third DMRS port is used for intra-cell interference measurement, and the method further includes:

The first cell sends a DMRS on the first DMRS port, and the first DMRS port also includes a DMRS of the second cell;

The first cell sends a DMRS on the third DMRS port, the third DMRS port belongs to the second DMRS port, and the third DMRS port includes the DMRS of the first cell and the DMRS of the second cell;

Wherein, the DMRS ports in the second DMRS port except the third DMRS port are zero-power DMRSs of the first cell.

With reference to the fourth aspect, in some implementations of the fourth aspect, the zero-power reference signal resources of the first cell are used for inter-cell interference information measurement, and the method further includes:

The first cell sends a DMRS on the second DMRS port.

With reference to the fourth aspect, in some implementations of the fourth aspect, the zero-power reference signal resources of the first cell are used for inter-cell interference measurement, and the method further includes:

The first cell sends DMRS on the first DMRS port and the second DMRS port, the first DMRS port and the second DMRS port are zero-power DMRS ports of the second cell,

Wherein, the second DMRS port is specifically used for intra-cell interference measurement.

In a sixth aspect, a communication device is provided, including a processor. The processor may implement the second aspect or the third aspect and the method in any possible implementation manner of the second aspect or the third aspect. Optionally, the communication device further includes a memory, the processor is coupled to the memory, and can be used to execute instructions in the memory, so as to realize the second aspect or the third aspect and any possibility in the second aspect or the third aspect method in the implementation. Optionally, the communication device further includes a communication interface, and the processor is coupled to the communication interface. In this embodiment of the present application, the communication interface may be a transceiver, a pin, a circuit, a bus, a module or other types of communication interfaces, without limitation.

In an implementation manner, the communication device is a terminal device. When the communication device is a terminal device, the communication interface may be a transceiver, or an input/output interface.

In another implementation manner, the communication device is a chip configured in a terminal device. When the communication device is a chip configured in a terminal device, the communication interface may be an input/output interface, and the processor may be a logic circuit.

Optionally, the transceiver may be a transceiver circuit. Optionally, the input/output interface may be an input/output circuit.

In a sixth aspect, a communication device is provided, including a processor. The processor may implement the first aspect or the fourth aspect and the method in any possible implementation manner of the first aspect or the fourth aspect. Optionally, the communication device further includes a memory, and the processor is coupled to the memory, and can be used to execute instructions in the memory, so as to realize any possibility in the first aspect or the fourth aspect and the first aspect or the fourth aspect. method in the implementation. Optionally, the communication device further includes a communication interface, and the processor is coupled to the communication interface. In this embodiment of the present application, the communication interface may be a transceiver, a pin, a circuit, a bus, a module or other types of communication interfaces, without limitation.

In an implementation manner, the communication device is a network device. When the communication device is a network device, the communication interface may be a transceiver, or an input/output interface.

In another implementation manner, the communication device is a chip configured in a network device. When the communication device is a chip configured in a network device, the communication interface may be an input/output interface, and the processor may be a logic circuit.

Optionally, the transceiver may be a transceiver circuit. Optionally, the input/output interface may be an input/output circuit.

In a seventh aspect, a processor is provided, including: an input circuit, an output circuit, and a processing circuit. The processing circuit is configured to receive a signal through the input circuit and transmit a signal through the output circuit, so that the processor executes the method in any possible implementation manner of the first aspect to the fourth aspect and the first aspect to the fourth aspect .

In the specific implementation process, the above-mentioned processor can be one or more chips, the input circuit can be an input pin, the output circuit can be an output pin, and the processing circuit can be a transistor, a gate circuit, a flip-flop and various logic circuits, etc. . The input signal received by the input circuit may be received and input by, for example but not limited to, the receiver, the output signal of the output circuit may be, for example but not limited to, output to the transmitter and transmitted by the transmitter, and the input circuit and the output The circuit may be the same circuit, which is used as an input circuit and an output circuit respectively at different times. The embodiment of the present application does not limit the specific implementation manners of the processor and various circuits.

In an eighth aspect, a computer program product is provided, and the computer program product includes: a computer program (also referred to as code, or an instruction), which, when the computer program is executed, causes the computer to execute the above-mentioned first aspect to the fourth aspect And the method in any possible implementation manner of the first aspect to the fourth aspect.

In a ninth aspect, a computer-readable storage medium is provided, and the computer-readable storage medium stores a computer program (also referred to as code, or an instruction) which, when run on a computer, causes the computer to perform the above-mentioned first to The fourth aspect and the method in any possible implementation manner of the first aspect to the fourth aspect.

In a tenth aspect, a communication system is provided, including the foregoing at least one network device and the foregoing at least one terminal device.

Description of drawings

FIG. 1 is a schematic architecture of a communication system applicable to an embodiment of the present application;

FIG. 2 is a schematic diagram of multi-transmission point coordinated transmission provided by an embodiment of the present application;

FIG. 3 is a schematic flowchart of a method for acquiring channel information provided by an embodiment of the present application;

Fig. 4 is another schematic flow chart of the channel information acquisition method provided by the embodiment of the present application;

FIG. 5 is a schematic diagram of method 1 for acquiring channel information provided by an embodiment of the present application;

FIG. 6 is a schematic diagram of the second method of the channel information acquisition method provided by the embodiment of the present application;

FIG. 7 is a schematic diagram of Mode 3 of the channel information acquisition method provided by the embodiment of the present application;

FIG. 8 is a schematic block diagram of a communication device provided by an embodiment of the present application;

FIG. 9 is a schematic structural diagram of a terminal device provided by an embodiment of the present application;

FIG. 10 is a schematic structural diagram of a network device provided by an embodiment of the present application.

Detailed ways

The technical solution in this application will be described below with reference to the accompanying drawings.

In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

The terms "first", "second" and the like in the description, claims, and above-mentioned drawings of the embodiments of the present application are used to distinguish similar objects, and are not necessarily used to describe a specific sequence or sequence. It is to be understood that the data so used are interchangeable under appropriate circumstances such that the embodiments of the application described herein can be practiced in sequences other than those illustrated or described herein. Furthermore, the terms "comprising" and "having", as well as any variations thereof, are intended to cover a non-exclusive inclusion, for example, a process, method, system, product or device comprising a sequence of steps or elements is not necessarily limited to the expressly listed instead, may include other steps or elements not explicitly listed or inherent to the process, method, product or apparatus.

The technical solution of the embodiment of the present application can be applied to various communication systems, for example: long term evolution (long term evolution, LTE) system, LTE frequency division duplex (frequency division duplex, FDD) system, LTE time division duplex (time division duplex) , TDD), universal mobile telecommunications system (UMTS), worldwide interoperability for microwave access (WiMAX) communication system, fifth generation (5th generation, 5G) system or new wireless ( new radio, NR) and future communication systems, such as the sixth generation mobile communication system. This application is not limited to this.

FIG. 1 is a schematic diagram of a communication system suitable for the present application.

As shown in FIG. 1 , the communication system 100 may include at least one network device, such as network devices 101 , 102 , and 103 in FIG. 1 ; the communication system 100 may also include at least one terminal device 104 , 105 . Wherein, the terminal devices 102 to 107 may be mobile or fixed. A network device includes multiple transmission points, at least one transmission point may form a cell, and a network device may include multiple cells. FIG. 1 shows a situation where a network device includes 3 cells, for example, multiple transmission points of the network device 101 form 3 cells, but the present application is not limited thereto.

The network can communicate with terminal devices in a multi-transmission point cooperative manner. The manner of multi-transmission point cooperation includes but not limited to the following manners of cooperation of multiple transmission points of the same network device and the manner of cooperation of multiple transmission points of different network devices.

For example, the terminal device 104 shown in FIG. 1 is located at the boundary of two cells of the network device 101, and can receive signals from two transmission points of the network device 101 at the same time, and the network device can configure these two transmission points to cooperate to complete the terminal device. 104 data transfers. Another example is that the terminal device 105 shown in FIG. 1 is located at the intersection of the coverage of the three cells of the network devices 101, 102, and 103, and the transmission points corresponding to the three cells can cooperate to complete the data transmission of the terminal device 105. . But the present application is not limited thereto.

The terminal equipment in the embodiment of the present application may also be referred to as user equipment (user equipment, UE), access terminal, subscriber unit, subscriber station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal , wireless communication device, user agent, or user device. The terminal device in the embodiment of the present application may be a mobile phone, a tablet computer, a computer with a wireless transceiver function, a virtual reality (virtual reality, VR) terminal device, an augmented reality (augmented reality, AR) terminal device, a wireless Terminals, wireless terminals in autonomous driving, wireless terminals in telemedicine, wireless terminals in smart grid, wireless terminals in transportation security, wireless terminals in smart cities, wireless terminals in smart homes, cellular phones, cordless phones , session initiation protocol (session initiation protocol, SIP) telephone, wireless local loop (wireless local loop, WLL) station, personal digital assistant (personal digital assistant, PDA), handheld device with wireless communication function, computing device, vehicle-mounted device , wearable devices, terminal devices in the 5G network or terminal devices in the future evolved public land mobile network (PLMN), etc. It should be understood that the present application does not limit the specific form of the terminal device.

The network device in this embodiment of the present application may be a device in an access network that has a wireless transceiver function. The equipment includes but is not limited to: base station, evolved node B (evolved node B, eNB), radio network controller (radio network controller, RNC), node B (node B, NB), base station controller (base station controller, BSC), base transceiver station (base transceiver station, BTS), home base station (for example, home evolved nodeB, or home node B, HNB), wireless fidelity (wireless fidelity, WIFI) system in the access point (access point, AP), wireless relay node, wireless backhaul node. The present application does not limit the specific form of the network device.

The transmission point in the embodiment of the present application may be a transmission point (transmission point) that only has an information sending function, or may be a transmission and reception point (TRP) that has an information sending function and a receiving function. The transmission point can be the network device itself, or the transmission point can be the antenna panel of the network device, or the transmission point can be the baseband unit (baseband unit, BBU), remote radio unit (remote radio unit, RRU) or distributed unit (distributed unit, DU), etc., this application does not limit the specific form of the transmission point.

In this embodiment of the present application, a cell may correspond to a transmission point, a cell may include one or more transmission points, and one or more transmission points corresponding to a cell are used to transmit signals of the cell. The transmission point in the embodiment of the present application may be replaced by a cell, and the cell may be replaced by a transmission point.

Related technologies and terms involved in the embodiments of the present application are described below.

1. Multi-transmission point cooperative transmission

Multiple transmission points complete the data transmission to the same terminal device through cooperative scheduling. The multiple transmission nodes can be connected to a central scheduler through optical fibers, so that the data transmission of multiple transmission nodes can be uniformly scheduled through cooperation; Alternatively, multiple transmission points may be connected to different schedulers, and the transmission points transmit information related to scheduling the terminal device, such as channel information from the terminal device to each node, through backhaul.

The multi-transmission point cooperative transmission manner may include coherent joint transmission (Coherent Joint Transmission, CJT) and non-coherent joint transmission (Coherent Joint Transmission, CJT). During CJT, the transmission signals of the transmission points participating in the coordinated transmission are coherent, and each transmission point uses the same precoding matrix and modulation and coding method to send data to the terminal device. In NCJT, the signals transmitted by each transmission point are non-coherent, and each transmission point uses different precoding matrices and different modulation and coding methods for transmission.

2. CSI measurement

The network device can obtain the channel state information CSI corresponding to the channel between the network device and the terminal device, so that the network device can process the transmission data and information according to the CSI, for example, the network device can determine the channel coding method for data transmission or information transmission according to the CSI , precoding mode and modulation mode, etc., so that sending information/data can overcome channel interference to a certain extent, realize link self-adaptation, and improve communication reliability.

Since the network device cannot directly obtain the CSI, the terminal device needs to be able to measure the CSI and feed back the measured CSI to the network device. The terminal device can perform CSI measurement based on the reference signal resources configured by the network device.

The network device may configure reference signal resources for measuring CSI for the terminal device, and the reference signal resources for measuring CSI may include channel measurement resources (channel measurement resource, CMR) and interference measurement resources (interference measurement resource, IMR). The CMR is used for channel measurement, and the IMR is used for interference measurement. The terminal device can determine the CSI according to the channel information obtained by measuring the CMR and the interference information obtained by measuring the IMR. Wherein, the CMR may be a non-zero power (non-zero power, NZP) reference signal resource, which is used to provide a CSI-RS of a transmission point (which may be called a service transmission point) of a data transmission service. The IMR may include non-zero power reference signal resources and zero power (zero power, ZP) reference signal resources. The serving transmission point sends the reference signal on the non-zero power reference signal resource, and the terminal device can measure the non-zero power reference signal resource to obtain the interference information in the cell. The interference information in the cell can be the information sent by the serving transmission point to other terminal devices or Information about the interference caused by the data to the communication between the terminal device and the service transmission point. The serving transmission point does not send a signal on the zero-power reference signal resource, and the terminal device can measure the zero-power reference signal resource to obtain inter-cell interference information. The inter-cell interference information can be the communication between the terminal device and the transmission point other than the serving transmission point. Information about interference caused by serving transmission point communications.

It should be noted that, in this embodiment of the present application, for a terminal device, the non-zero power reference signal resource refers to the reference signal resource used by the serving transmission point of the terminal device to send the reference signal, that is, the non-zero power reference signal resource on the non-zero power reference signal resource The serving transmission point carrying the terminal device sends the reference signal. The zero-power reference signal resource refers to the reference signal resource that the serving transmission point of the terminal device does not send a signal, that is, the zero-power reference signal resource is not used to bear the signal sent by the serving transmission point of the terminal device.

Currently, for the coordinated multi-point transmission mode, the network device configures corresponding CSI measurement reference signal resources, including CMR and IMR, for the terminal device based on the coordinated transmission point set of the terminal device. However, this way of configuring different cooperative transmission point sets centered on the terminal equipment is relatively complex for the network, and the resource overhead of reference signals is relatively large, which will affect the throughput of data transmission. .

For example, for the three TRPs shown in Figure 2 (an example of a transmission point), TRP1, TRP2, and TRP3, there are seven possible combinations to provide data transmission services for different terminal devices, namely {TRP1}, {TRP2}, {TRP3}, {TRP1, TRP2}, {TRP1, TRP3}, {TRP2, TRP3}, {TRP1, TRP2, TRP3}, for different sets of service transmission points, the network needs to configure the CMR and IMR of the corresponding terminal equipment as follows Table 1 shows.

Table 1

set of transmission points	CMR	IMR
TRP1	CMR1	IMR1
TRP2	CMR2	IMR2
TRP3	CMR3	IMR3
TRP1, TRP2	CMR1, CMR2	IMR4
TRP2, TRP3	CMR2, CMR3	IMR5
TRP1, TRP3	CMR1, CMR3	IMR6
TRP1, TRP2, TRP3	CMR1, CMR2, CMR3	IMR7

As shown in Figure 2, TRP1 alone provides data transmission services for terminal device 1. The network device needs to configure CMR1 and IMR1 corresponding to TRP1 for terminal device 1. TRP1 sends reference signals on this CMR1 and does not send signals on this IMR1. Terminal The device measures CMR1 to obtain channel information, measures IMR2 to obtain interference information from TRPs other than TRP1, and reports CSI based on the channel information and interference information. For terminal device 2, TRP1 and TRP3 provide data transmission services for the terminal device 2. The network device needs to configure CMR1 corresponding to TRP1, CMR3 corresponding to TRP3, and IMR3 corresponding to TRP1 and TRP2 for terminal device 1. No signal is sent on IMR3. For terminal device 3, TRP1, TRP2, and TRP3 provide data transmission services for the terminal device 3. The network device needs to configure CMR1 corresponding to TRP1, CMR2 corresponding to TRP2, CMR3 corresponding to TRP3, and IMR3, TRP1, TRP2 and TRP3 does not send a signal on IMR3.

It can be seen from Table 7 that when there are 3 transmission points, the network device needs to configure 10 reference signal resources (including 3 CMRs and 7 IMRs) for obtaining CSI. These resources may also be periodic resources, while Table 7 The IMR in is only a zero-power IMR used to measure the interference of neighboring cells. If the network device needs to obtain more accurate channel information, such as obtaining the interference in the cell, it is also necessary to configure a non-zero-power IMR for the terminal device. On the other hand, with the increase of coordinated transmission points, the reference signal resources will further increase. Therefore, the current reference signal resource configuration method centered on terminal equipment is relatively complex for the network, and the reference signal resource overhead is large, which reduces data transmission resources and affects the overall data transmission throughput of the network.

The communication method provided by the embodiment of the present application will be described below with reference to the accompanying drawings.

Embodiment one

Embodiment 1 of this application proposes to configure reference signal resources centered on transmission points instead of configuring reference signal resources centered on terminal devices. The network device can determine the reference signal resources corresponding to transmission points, and based on the transmission point set of terminal devices, notify For the terminal device, the reference signal resource corresponding to the serving transmission point of the terminal device is used for channel information measurement; and the reference signal resource corresponding to the interfering transmission point is used for interference measurement. Resource overhead of reference signal resources can be reduced. The method for acquiring channel state information provided in Embodiment 1 of the present application will be introduced below with reference to FIG. 3 .

FIG. 3 is a schematic flowchart of a method 300 for acquiring channel state information provided by an embodiment of the present application.

S301. The network device sends configuration information to the terminal device, where the configuration information is used to indicate multiple reference signal resources corresponding to one piece of channel state information, where the multiple reference signal resources include at least one first reference signal resource and multiple second reference signal resources resources, the first reference signal resource is used for channel measurement, and the second reference signal resource is used for interference measurement.

The network device determines reference signal resources corresponding to multiple transmission points, and each transmission point among the multiple transmission points sends a reference signal on the corresponding reference signal resource. The plurality of transmission points may include at least one transmission point of the network device. The network device may allocate corresponding reference signal resources to transmission points of the network device.

Optionally, the multiple transmission points may also include at least one transmission point of the network device. The network device may acquire resource configuration information of reference signal resources of the transmission point from a network device corresponding to the transmission point.

For example, network device 1 may allocate corresponding reference signal resources to the transmission points of network device 1, and network device 1 may also obtain resource configuration information of reference signal resources corresponding to the transmission points of network device 2 from network device 2, and the network device 1. According to the resource configuration information from the network device 2, determine the reference signal resource corresponding to the transmission point of the network device 2. Specifically, the cell of transmission point 2 of network device 2 and the cell of network device 1 are adjacent cells, or transmission point 2 is an interference transmission point of transmission point 1, for example, the signal of transmission point 2 interferes with the signal of transmission point 1 , then the network device 1 can obtain the resource configuration information of the reference signal resource corresponding to the transmission point 2 from the network device 2, and determine the reference signal resource corresponding to the transmission point 2 according to the resource configuration information.

The network device may determine at least one transmission point, where the at least one transmission point is a transmission point that provides a data transmission service for the terminal device, and when the at least one transmission point includes at least two transmission points, the two transmission points cooperate to provide the terminal device with Data Transfer Services. Optionally, the service transmission point of the terminal device may be a transmission point of a network device accessed by the terminal device, or may be a transmission point of other network devices. Network devices can exchange information through the Xn interface to realize cooperative transmission between transmission points of different network devices.

The network device configures multiple reference signal resources for the terminal device through configuration information, where the multiple reference signal resources include at least one first reference signal resource, where the at least one first reference signal resource corresponds to at least one first transmission point, and the first transmission point A point is a transmission point that provides a data transmission service for a terminal device, and the at least one first reference signal resource is used for channel measurement.

For example, the transmission point 1 and the transmission point 2 cooperate to provide the data transmission service for the terminal device. The network device can configure the reference signal resource 1 corresponding to the transmission point 1 and the reference signal resource 2 corresponding to the transmission point 2 for the terminal device through the configuration information. The reference signal resource 1 and the reference signal resource 2 are used for channel measurement. The terminal device measures the reference signal resource 1 to obtain the channel information with the transmission point 1, and measures the reference signal resource 2 to obtain the channel information with the transmission point 2.

The multiple reference signal resources further include multiple second reference signal resources, where the multiple second reference signal resources correspond to multiple second transmission points. The second transmission point is an interference transmission point of at least one first transmission point, and a signal sent by the second transmission point interferes with communication between the at least one first transmission point and the terminal device. The first transmission point does not send a signal on the second reference signal resource. That is to say, the second reference signal resource is the zero-power reference signal resource of the first transmission point. The second transmission point does not send a signal on the first reference signal resource.

The network device may determine multiple second transmission points that interfere with the communication between the first transmission point and the terminal device, and notify the terminal device of the second reference signal corresponding to each second transmission point among the multiple second transmission points through configuration information resources for interference measurements.

For example, transmission point 1 and transmission point 2 cooperate to provide data transmission service for terminal device 1 . The network device may determine the interference transmission point of at least one of the transmission point 1 and the transmission point 2, for example, the network device determines that the interference transmission point is the transmission point 3, the transmission point 4, and the transmission point 5. The network device may configure the multiple second reference signal resources of the terminal device 1 to include the reference signal resource 3 corresponding to the transmission point 3, the reference signal resource 4 corresponding to the transmission point 4, and the reference signal resource 5 corresponding to the transmission point 5. The terminal device 1 measures the reference signal resource 3 , the reference signal resource 4 and the reference signal resource 5 to obtain interference information.

The network device may also be connected to a terminal device 2 , and the transmission point 2 , the transmission point 3 and the transmission point 4 cooperate to provide data transmission services for the terminal device 2 . The network device can determine the interference transmission point of at least one of transmission point 2, transmission point 3, and transmission point 4, such as transmission point 1 and transmission point 5, and the network device can configure the terminal device 2 with the corresponding The reference signal resource 2, the reference signal resource 3 corresponding to the transmission point 3, and the reference signal resource 4 corresponding to the transmission point 4 are used for the terminal device 2 to perform channel measurement, and the configuration information configures the reference signal resource 1 corresponding to the transmission point 1 for the terminal device 2 The reference signal resource 5 corresponding to the transmission point 5 is used for the terminal device 2 to perform interference measurement.

The reference signal resources corresponding to the transmission point and the CMR and IMR of the terminal equipment are shown in Table 2.

Table 2

transmission point	Reference Signal Resources	terminal device 1	terminal device 2
1	1	CMR		IMR
2	2	CMR		CMR
3	3	IMR		CMR
4	4	IMR		IMR
5	5	IMR	IMR

According to the above example, it can be seen that the reference signal resource 1 corresponding to the transmission point 1 is used as a CMR for the terminal device 1 for channel measurement, and as an IMR for the terminal device 2 and used for interference measurement. The reference signal resource 3 corresponding to the transmission point 3 is used as an IMR for the terminal device 1 for interference measurement, and as a CMR for the terminal device 2 and used for channel measurement. Network devices do not need to configure different reference signal resources for each terminal device from the perspective of terminal devices, so that the transmission point needs to send or not send signals on multiple resources according to different resource configurations of different terminal devices to achieve High complexity.

According to the solution provided by the embodiment of the present application, the network configures the resources corresponding to the transmission point from the perspective of the transmission point, and the network device configures the reference signal resources corresponding to the transmission point through the configuration information according to whether the transmission point is the serving transmission point of the terminal device or the interference transmission point is a reference signal resource for channel measurement or for interference measurement. The implementation complexity and the overhead of reference signal resources in network radio resources can be reduced. Thereby improving data transmission throughput.

The multiple second reference signal resources include reference signal resource 3 corresponding to transmission point 3 , reference signal resource 4 corresponding to transmission point 4 , and reference signal resource 5 corresponding to transmission point 5 .

Optionally, the multiple second transmission points may include transmission points of the network device. And/or, the plurality of second transmission points may include transmission points of other network devices other than the network device.

The terminal device may obtain intra-site interference by measuring the second reference signal resource corresponding to the transmission point of the network device. Inter-station interference may be obtained by the terminal device measuring the second reference signal resources corresponding to transmission points of other network devices other than the network device.

Optionally, the multiple reference signal resources further include at least one third reference signal resource, where the at least one third reference signal resource is a non-zero power reference signal resource.

The at least one third reference signal resource corresponds to at least one first transmission point. The at least one third reference signal is used to carry the reference signal of the at least one first transmission point, and the at least one third reference signal resource is used for interference measurement in the serving cell.

That is to say, one transmission point may correspond to two reference signal resources, wherein one reference signal resource is used for channel measurement, and the other reference signal resource is used for interference measurement. When the network device needs the terminal device to measure the interference in the serving cell, the network device can configure the third reference signal resource corresponding to the first transmission point through configuration information, so that the terminal device can measure the interference in the serving cell. The interference in the serving cell is used to characterize the interference caused to the communication between the terminal device and the serving transmission point when the serving transmission point of the terminal device sends signals to other terminal devices.

S302. The terminal device measures the at least one first reference signal resource to obtain channel information, and measures the multiple second reference signal resources to obtain interference information.

According to the configuration information, the terminal device measures multiple reference signal resources configured by the configuration information, measures the at least one first reference signal resource to obtain channel information, and measures the multiple second reference signal resources to obtain first interference information. The interference information is inter-cell interference information.

Optionally, the terminal device measures multiple second reference signal resources to obtain multiple pieces of interference covariance information, and determines the first interference information according to the multiple pieces of interference covariance information.

For example,

The terminal device may measure the multiple second reference signal resources to obtain an interference covariance matrix corresponding to each second reference signal resource. For example, the configuration information configures N second reference signal resources, where N is an integer greater than 1, and the terminal device measures the N second reference signal resources to obtain an interference covariance matrix I _n corresponding to each second reference signal resource, where , n is a positive integer less than or equal to N. The terminal equipment sums the covariance matrices obtained for the N reference signal resources to obtain the inter-cell interference covariance matrix

The first interference information includes an inter-cell interference covariance matrix.

Optionally, the multiple reference signal resources configured by the configuration information further include at least one third reference signal resource, and the terminal device measures the at least one third reference signal resource to obtain the second interference information. The second interference information is intra-cell interference information.

The terminal device may obtain an interference covariance matrix corresponding to each third reference signal resource by measuring the at least one third reference signal resource. For example, the configuration information configures M third reference signal resources, where M is a positive integer, and the terminal device measures the M third reference signal resources to obtain the interference covariance matrix I _m corresponding to each third reference signal resource, where n is a positive integer less than or equal to M. The terminal equipment sums the obtained covariance matrices for the M reference signal resources to obtain the intra-cell interference covariance matrix

The first interference information includes an inter-cell interference covariance matrix.

S303. The terminal device sends channel state information to the network device, where the channel state information is determined according to the channel information and the first interference information.

Correspondingly, the network device receives the channel state information from the terminal device. After measuring at least one first reference signal resource and multiple second reference signal resources, the terminal device obtains channel state information according to the measured channel information and first interference information, and sends it to the network device.

As an example without limitation, the channel state information includes one or more of the following:

Reference signal resource indicator, rank indicator (rank indicator, RI), precoding matrix indicator (precoding matrix indicator, PMI) or channel quality indicator (channel quality indicator, CQI), signal to interference plus noise ratio (signal to interference plus noise ratio, SINR) or reference signal receive power (reference signal receive power, RSRP).

The first transmission point may process the data to be transmitted according to the channel state information from the terminal device and then send it to the terminal device. For example, the first transmission point can determine the precoding method (such as precoding matrix), modulation and coding method (such as modulation order, etc.), channel coding method (such as coding rate, etc.) or transmission layer of data transmission according to the channel state information. one or more of the numbers. But the present application is not limited thereto.

According to the solution provided by the embodiment of the present application, the network configures the resources corresponding to the transmission point from the perspective of the transmission point, and the network device configures the reference signal resources corresponding to the transmission point through the configuration information according to whether the transmission point is the serving transmission point of the terminal device or the interference transmission point is a reference signal resource for channel measurement or for interference measurement. There is no need to configure CMR and IMR for the transmission point set of each terminal device, so that the transmission point needs to send or not send signals on resources corresponding to different terminal devices according to different configurations of different terminal devices. The implementation complexity and the overhead of reference signal resources in network radio resources can be reduced. Thereby improving data transmission throughput.

Embodiment two

Embodiment 2 of the present application proposes that a demodulation reference signal (demodulation reference signal, DMRS) port configured by a network device for a terminal device can be reused to obtain channel state information, which can improve resource utilization and reduce reference signal resource overhead.

It should be noted that the port in the embodiment of the present application refers to the physical resource of the signal sent by the sending end and/or the signal received by the receiving end, wherein the DMRS port in the embodiment of the present application refers to the physical resource used by the transmission point to send the DMRS . The physical resources may include but not limited to one or more of time domain resources, frequency domain resources, air domain resources, code domain resources or antenna resources.

FIG. 4 is a schematic flowchart of a method 400 for acquiring channel state information provided by an embodiment of the present application.

S401, the terminal device receives control information, the control information is used to schedule a physical downlink shared channel (physical downlink shared channel, PDSCH), the control information includes first indication information, the first indication information is used to indicate the first DMRS port, the The first DMRS port is the DMRS port corresponding to the PDSCH.

One or more serving transmission points of the terminal device send control information for scheduling the PDSCH to the terminal device, the first indication information in the control information is used to indicate the first DMRS port, and the first DMRS port uses For sending DMRS, the DMRS is used to demodulate the PDSCH.

Optionally, the service transmission point of the terminal device may be a transmission point of a network device accessed by the terminal device, or may be a transmission point of other network devices. Network devices can exchange information through the Xn interface to realize cooperative transmission between transmission points of different network devices.

The first DMRS port belongs to the DMRS port set corresponding to the terminal device. Optionally, the network device sends first configuration information to the terminal device, where the first configuration information is used to configure the DMRS port set. When the service transmission point of the terminal equipment transmits data with the terminal equipment, the DMRS ports in the DMRS port set can be scheduled to transmit DMRS.

S402. The terminal device sends channel state information, where the channel state information is determined according to the first DMRS port and the second DMRS port.

Wherein, the first DMRS port is used for channel measurement, the second DMRS port is used for interference measurement, and the second DMRS port belongs to a DMRS port set.

Optionally, the set of DMRS ports are orthogonal DMRS ports available in the network.

For example, the DMRS port set includes four DMRS ports as shown in Table 3 and Table 4: DMRS port 0 to DMRS port 3, wherein DMRS ports 0 and 1 correspond to a CDM group, and DMRS ports 2 and 3 correspond to another CDM group. Group.

Table 3 DMRS type 1, symbol length 1

Table 4 DMRS type 1, symbol length 1

For another example, the DMRS port set includes 8 DMRS ports as shown in Table 5: DMRS port 0 to DMRS port 7, wherein DMRS ports 0, 1, 4, and 5 correspond to a CDM group, and DMRS ports 2, 3, and 6 , 7 corresponds to another CDM group.

Table 5 DMRS type 1, symbol length 2

For another example, the DMRS port set includes 6 DMRS ports as shown in Table 6: DMRS ports 0-5, DMRS ports 0 and 1 correspond to a CDM group, DMRS ports 2 and 3 correspond to a CDM group, and DMRS ports 4 and 5 correspond to a CDM group. Corresponds to another CDM group.

Table 6 DMRS type 2, symbol length 1

For another example, the DMRS port set includes 12 DMRS ports as shown in Table 7: DMRS port 0 to DMRS port 11, DMRS ports 0, 1, 6, and 7 correspond to a CDM group, and DMRS ports 2, 3, 8, and 9 Corresponding to one CDM group, DMRS ports 4, 5, 10, and 11 correspond to another CDM group.

Table 7 DMRS type 2, symbol length 2

Optionally, the first indication information is used to schedule the PDSCH, and the first DMRS port indicated by the first indication information is the DMRS of the PDSCH.

For example, the first indication information may be a bit domain field of control information, and the field value of the first indication information may be the bit domain field value as shown in Table 3-7. But the present application is not limited thereto.

The manner in which the terminal device obtains the channel state information according to the DMRS port includes but is not limited to one or more of the following manners 1 to 3.

method one

Part or all of the DMRS ports in the DMRS port set are used for interference measurement, and the scheduled DMRS ports in the DMRS port set are used for channel measurement.

After receiving the control information, the terminal device determines that the first DMRS port is scheduled according to the first indication information, and the terminal device may determine that the first DMRS port is used for channel measurement.

The terminal device measures the first DMRS port to obtain first measurement information, where the first measurement information includes channel information and interference information. And, the DMRS ports other than the first DMRS port in the DMRS port set are the second DMRS ports, and the terminal device measures the second DMRS ports to obtain second measurement information, where the second measurement information includes interference information. The terminal device may obtain channel information by eliminating interference information from the first measurement information according to the first measurement information and the second measurement information.

The terminal device then determines the channel state information according to the interference information and channel information, and reports it to the network. So that the transmission point can process the data to be transmitted based on the channel state information reported by the terminal device, and send it to the terminal device. The processed data can be carried on the PDSCH, and the transmission point can process the data and send it to the terminal device through the PDSCH based on the channel state information obtained last time.

For example, as shown in FIG. 5 , the DMRS port set corresponding to the terminal device includes DMRS port 0 to DMRS port 11, a total of 12 DMRS ports, and the 12 DMRS ports are respectively on different resources in two symbols in the time domain. The terminal device receives the control information of the scheduled PDSCH from cell 1, and the first indication information in the control information indicates DMRS port 0 and DMRS port 1 (that is, the first DMRS port includes DMRS port 0 and DMRS port 1), and the terminal device can Determine the DMRS sent by the cell 1 on the DMRS port 0 and the DMRS port 1 for demodulating the PDSCH, and the scheduled DMRS port 0 and the DMRS port 1 are also used for channel measurement of the terminal equipment. The other DMRSs in the DMRS port set, namely DMRS port 2 to DMRS port 11 are used for interference measurement. For example, cell 2 sends DMRS on the DMRS port set, which is an interference signal to cell 1, and the terminal device can measure DMRS port 2 to DMRS port 11 to obtain interference information.

The terminal device can measure DMRS port 0 and DMRS port 1 to obtain first measurement information, and measure DMRS port 2 to DMRS port 11 to obtain second measurement information, wherein the first measurement information includes channel information and interference information, and the terminal device The first measurement information The second measurement information includes interference information, and the terminal device obtains channel information by eliminating the interference information from the first measurement information according to the first measurement information and the second measurement information. The terminal device then determines the channel state information according to the interference information and channel information, and reports it to the network.

Optionally, cell 1 may send second indication information to the terminal device, where the second indication information is used to indicate a third DMRS port in the second DMRS ports, where the third DMRS port is used for intra-cell interference measurement. The terminal device may also determine the DMRS ports other than the third DMRS port among the second DMRS ports to be used for inter-cell interference measurement.

The third DMRS port in the DMRS set except the second DMRS port is the zero-power DMRS port of cell 1.

For example, in the example shown in FIG. 5 , cell 1 may send second indication information to the terminal device, and the second indication information indicates that DMRS port 2 to DMRS port 7 are used for intra-cell interference measurement, for example, cell 1 is connected to DMRS port 2 to DMRS port 7, the DMRS is sent to other terminal devices, which is an interference signal for the DMRS of the terminal device. The terminal device measures DMRS port 2 to DMRS port 7 according to the second indication information to obtain third measurement information, where the third measurement information includes intra-cell interference information and inter-cell interference information. The terminal device may also determine that DMRS ports other than DMRS port 0 to DMRS port 7 in the DMRS set are used for inter-cell interference measurement, and the terminal device measures DMRS port 8 to DMRS port 11 to obtain fourth measurement information, the fourth measurement information includes Inter-cell interference information. The terminal device can eliminate the inter-cell interference information from the third measurement information according to the third measurement information and the fourth measurement information, and obtain the intra-cell interference information.

For example, the third measurement information is the mixed interference covariance matrix I _mix obtained by measuring DMRS port 2 to DMRS port 7, and the fourth measurement information is the inter-cell interference covariance matrix I _inter obtained by measuring DMRS port 8 to DMRS port 11, then The terminal device can obtain the intra-cell interference covariance matrix I _intra by eliminating the inter-cell interference covariance matrix from the mixed interference covariance matrix, such as I _intra =I _mix -I _inter . But the present application is not limited thereto. In a specific embodiment, I _intra can also be obtained according to I _mix and I _inter by using other algorithms. For example, the Wiener filtering algorithm can be used for separation. The first measurement information may specifically include channel information, intra-cell interference information, and inter-cell interference information. The terminal device can obtain channel information by separating I _inter and I _intra from the first measurement information. The terminal device determines channel state information according to the acquired I _inter , I _intra and channel information, and reports it to the network.

way two

The scheduled DMRS port in the DMRS port set is used for channel measurement, and the second DMRS port in the DMRS port set and the zero-power resource of the serving cell are used for interference measurement. Wherein, in the second manner, the second DMRS port is an unscheduled DMRS port in the DMRS port set, and the second DMRS port is specifically used for intra-cell interference measurement. The zero-power resource of the serving cell refers to the resource that the serving cell does not send a signal. Optionally, the zero-power resource may be a zero-power CSI-RS resource, and the zero-power resource is used for inter-cell interference measurement.

After receiving the control information, the terminal device determines that the first DMRS port is scheduled according to the first indication information, and the terminal device may determine that the first DMRS port is used for channel measurement. The terminal device measures the first DMRS port to obtain first measurement information, where the first measurement information includes channel information and interference information, and the interference information includes intra-cell interference information and inter-cell interference information.

According to the first DMRS port, the terminal device can determine that a DMRS port other than the DMRS port set is the second DMRS port for intra-cell interference measurement, and the terminal device measures the second DMRS port to obtain second measurement information, and the second measurement information includes the intra-cell Interference information and inter-cell interference information. The terminal device then measures the zero-power resource of the serving cell to obtain fifth measurement information, where the fifth measurement information includes inter-cell interference information.

The terminal device may obtain channel information by eliminating intra-cell interference information and inter-cell interference information from the first measurement information according to the first measurement information and the second measurement information. And the terminal device can eliminate the inter-cell interference information from the second measurement information according to the second measurement information and the fifth measurement information, to obtain the intra-cell interference information.

The terminal device then determines the channel state information according to the channel information, the inter-cell interference information and the intra-cell interference information, and reports it to the network. So that the transmission point can process the data to be transmitted based on the channel state information reported by the terminal device, and send it to the terminal device. The processed data can be carried on the PDSCH, and the transmission point can process the data and send it to the terminal device through the PDSCH based on the channel state information acquired last time.

For example, as shown in FIG. 6, the terminal equipment receives the control information of scheduling PDSCH from cell 1, and the first indication information in the control information indicates DMRS port 0 and DMRS port 1 (that is, the first DMRS port includes DMRS port 0 and DMRS port 1) The terminal device can determine the DMRS sent by cell 1 on DMRS port 0 and DMRS port 1 for demodulating the PDSCH, and the scheduled DMRS port 0 and the DMRS port 1 are also used for channel measurement of the terminal device. The other DMRSs in the DMRS port set, namely DMRS port 2 to DMRS port 11 are used for intra-cell interference measurement.

Cell 1 can send DMRS to other terminal devices on DMRS port 2 to DMRS port 11, so that the terminal device can obtain interference information in the cell based on measuring DMRS port 2 to DMRS port 11. The terminal device measures DMRS port 0 and DMRS port 1 to obtain first measurement information, where the first measurement information includes channel information, intra-cell interference information, and inter-cell interference information. For example, the inter-cell interference information includes the interference information generated by the PDSCH sent by the cell 2 on the DMRS port set corresponding to the terminal device. The terminal device measures DMRS port 2 to DMRS port 11 to obtain second measurement information, where the second measurement information includes intra-cell interference information and inter-cell interference information.

The terminal device may receive third indication information, where the third indication information is used to indicate the zero-power resource of cell 1. The terminal device may measure the zero-power resource of cell 1 to obtain fifth measurement information, where the fifth measurement information includes inter-cell interference information. As shown in Figure 6, the interfering cell of cell 1, such as cell 2, sends an interference signal, such as CSI-RS, on the zero-power resource of cell 1, so that the terminal equipment in cell 1 can measure the zero-power resource to obtain inter-cell interference information .

The terminal device may eliminate the inter-cell interference information from the second measurement information according to the second measurement information and the fifth measurement information, to obtain the intra-cell interference information. For example, the second measurement information is the mixed interference covariance matrix I _mix obtained by measuring DMRS port 2 to DMRS port 11, and the fifth measurement information is the inter-cell interference covariance matrix I _inter obtained by measuring zero power resources. The inter-cell interference covariance matrix is eliminated from the interference covariance matrix to obtain the intra-cell interference covariance matrix such as I _intra =I _mix -I _inter . But the present application is not limited thereto. In a specific embodiment, I _intra can also be obtained according to I _mix and I _inter by using other algorithms. For example, the Wiener filtering algorithm can be used for separation. The terminal device then separates I _inter and I _intra from the first measurement information to obtain channel information. The terminal device determines channel state information according to the acquired I _inter , I _intra and channel information, and reports it to the network.

Similarly, as shown in Figure 6, cell 2 can transmit DMRS at the PDSCH resource location scheduled by cell 1 (that is, the resource location of the PDSCH resource can be used as the DMRS port resource of the terminal device served by cell 2), for the terminal served by cell 2 Device channel measurements and interference measurements. And cell 1 can send an interference signal on the zero-power resource of cell 2, so that the terminal equipment in cell 2 can measure the zero-power resource of cell 2 to obtain inter-cell interference information.

way three

The scheduled DMRS port (ie, the first DMRS port) in the DMRS port set is used for channel measurement, and the second DMRS port in the DMRS port set and the zero power resources of the serving cell are used for interference measurement. The second DMRS port is an unscheduled DMRS port in the DMRS port set, and the second DMRS port is specifically used for intra-cell interference measurement. The terminal device measures the first DMRS port to obtain channel information, measures the second DMRS port information to obtain intra-cell interference information, and measures zero-power resources to obtain inter-cell interference information. The terminal device then determines the channel state information according to the channel information, the inter-cell interference information and the intra-cell interference information, and reports it to the network.

In mode 3, the interfering cell does not send signals on the DMRS port set corresponding to the terminal device, so that the terminal device can obtain channel information by measuring the scheduled DMRS port, and obtain intra-cell interference information by measuring the unscheduled DMRS port. The interfering cell sends an interference signal, such as CSI-RS, on the zero-power resource of the serving cell of the terminal device, and the terminal device can obtain inter-cell interference information by measuring the zero-power resource of the serving cell.

For example, as shown in Figure 7, cell 1 schedules DMRS port 0 and DMRS port 1 to send DMRS to the terminal device. After receiving the control information, the terminal device can determine that DMRS port 0 and DMRS port 1 are used for channel measurement, except for DMRS port 0 in the DMRS set. The DMRS ports of DMRS port 1 and DMRS port 1 are used for intra-cell interference measurement. The interfering cell of cell 1, such as cell 2, does not send signals on the DMRS port set of the terminal device. The terminal device measures DMRS port 0 and DMRS port 1 to obtain channel information, and measures DMRS port 2 to DMRS port 11 to obtain intra-cell interference information. Cell 2 sends an interference signal, such as CSI-RS, on the zero-power resource of cell 1, and the terminal device can obtain inter-cell interference information by measuring the zero-power resource. The terminal device then determines the channel state information according to the channel information, the inter-cell interference information and the intra-cell interference information, and reports it to the network.

Optionally, the terminal device may receive fourth indication information from the network device, and the fourth indication information is also used in a manner of obtaining channel state information, and the manner of obtaining channel state information may be one of the above three manners.

According to the solution provided by the embodiment of the present application, the terminal device can reuse the DMRS port configured by the network device for the terminal device to obtain channel state information, which can improve resource utilization and reduce reference signal resource overhead.

Above, the method provided by the embodiment of the present application is described in detail with reference to FIG. 2 to FIG. 8 . Hereinafter, the device provided by the embodiment of the present application will be described in detail with reference to FIG. 8 to FIG. 10 . In order to implement the functions in the method provided by the above embodiments of the present application, each network element may include a hardware structure and/or a software module, and implement the above functions in the form of a hardware structure, a software module, or a hardware structure plus a software module. Whether one of the above-mentioned functions is executed in the form of a hardware structure, a software module, or a hardware structure plus a software module depends on the specific application and design constraints of the technical solution.

Fig. 8 is a schematic block diagram of a communication device provided by an embodiment of the present application. As shown in FIG. 8 , the communication device 800 may include a transceiver unit 820 .

In a possible design, the communication device 800 may correspond to the terminal device in the above method embodiments, or a chip configured in (or used in) the terminal device, or other devices capable of implementing the method of the terminal device, modules, circuits or units etc.

It should be understood that the communication device 800 may correspond to the terminal device in the methods 300 and 400 according to the embodiment of the present application, and the communication device 800 may include a terminal device for executing the methods 300 and 400 in FIG. 3 and FIG. 4 The unit of the method. Moreover, each unit in the communication device 800 and the above-mentioned other operations and/or functions are for realizing the corresponding flows of the methods 300 and 400 in FIG. 3 and FIG. 4 respectively.

Optionally, the communication device 800 may further include a processing unit 810, and the processing unit 810 may be configured to process instructions or data to implement corresponding operations.

It should also be understood that when the communication device 800 is a chip configured in (or used in) a terminal device, the transceiver unit 820 in the communication device 800 may be an input/output interface or circuit of the chip, and the processing in the communication device 800 Unit 810 may be a processor in a chip.

Optionally, the communication device 800 may further include a storage unit 830, the storage unit 830 may be used to store instructions or data, and the processing unit 810 may execute the instructions or data stored in the storage unit, so that the communication device realizes corresponding operations .

It should be understood that the transceiver unit 820 in the communication device 800 can be implemented through a communication interface (such as a transceiver or an input/output interface), for example, it can correspond to the transceiver 910 in the terminal device 900 shown in FIG. 9 . The processing unit 810 in the communication apparatus 800 may be implemented by at least one processor, for example, may correspond to the processor 920 in the terminal device 900 shown in FIG. 9 . The processing unit 810 in the communication device 800 may also be implemented by at least one logic circuit. The storage unit 830 in the communication device 800 may correspond to the memory in the terminal device 900 shown in FIG. 9 .

It should also be understood that the specific process for each unit to perform the above corresponding steps has been described in detail in the above method embodiments, and for the sake of brevity, details are not repeated here.

In another possible design, the communication device 800 may correspond to the network device in the above method embodiment, for example, a chip configured (or used) in the network device, or other methods capable of realizing the network device device, module, circuit or unit etc.

It should be understood that the communication device 800 may correspond to the network device in the methods 300 and 400 according to the embodiments of the present application, and the communication device 800 may include a network device for executing the methods 300 and 400 in FIG. 3 and FIG. 4 The unit of the method. Moreover, each unit in the communication device 800 and the above-mentioned other operations and/or functions are for realizing the corresponding flows of the methods 300 and 400 in FIG. 3 and FIG. 4 respectively.

Optionally, the communication device 800 may further include a processing unit 810, and the processing unit 810 may be configured to process instructions or data to implement corresponding operations.

It should also be understood that when the communication device 800 is a chip configured in (or used in) a network device, the transceiver unit 820 in the communication device 800 may be an input/output interface or circuit of the chip, and the processing in the communication device 800 Unit 810 may be a processor in a chip.

Optionally, the communication device 800 may further include a storage unit 830, the storage unit 830 may be used to store instructions or data, and the processing unit 810 may execute the instructions or data stored in the storage unit, so that the communication device realizes corresponding operations .

It should be understood that when the communication device 800 is a network device, the transceiver unit 820 in the communication device 800 can be implemented through a communication interface (such as a transceiver or an input/output interface), for example, it can correspond to the network device shown in FIG. 10 Transceiver 1010 in 1000. The processing unit 810 in the communication device 800 can be implemented by at least one processor, for example, it can correspond to the processor 1020 in the network device 1000 shown in FIG. circuit implementation.

It should also be understood that the specific process for each unit to perform the above corresponding steps has been described in detail in the above method embodiments, and for the sake of brevity, details are not repeated here.

FIG. 9 is a schematic structural diagram of a terminal device 900 provided by an embodiment of the present application. The terminal device 900 may be applied to the system shown in FIG. 1 to execute the functions of the terminal device in the foregoing method embodiments. As shown in the figure, the terminal device 900 includes a processor 920 and a transceiver 910 . Optionally, the terminal device 900 further includes a memory. Wherein, the processor 920, the transceiver 910, and the memory may communicate with each other through an internal connection path, and transmit control and/or data signals. The memory is used to store computer programs, and the processor 920 is used to execute the computer programs in the memory to control the transceiver 910 to send and receive signals.

The processor 920 and the memory may be combined into a processing device, and the processor 920 is configured to execute the program codes stored in the memory to realize the above functions. During specific implementation, the memory may also be integrated in the processor 920, or be independent of the processor 920. The processor 920 may correspond to the processing unit in FIG. 8 .

The above-mentioned transceiver 910 may correspond to the transceiver unit in FIG. 8 . The transceiver 910 may include a receiver (or receiver, receiving circuit) and a transmitter (or transmitter, transmitting circuit). Among them, the receiver is used to receive signals, and the transmitter is used to transmit signals.

It should be understood that the terminal device 900 shown in FIG. 9 can implement processes involving the terminal device in the method embodiments shown in FIGS. 3 and 4 . The operations and/or functions of the various modules in the terminal device 900 are respectively for implementing the corresponding processes in the foregoing method embodiments. For details, reference may be made to the descriptions in the foregoing method embodiments, and detailed descriptions are appropriately omitted here to avoid repetition.

The above-mentioned processor 920 can be used to execute the actions implemented by the terminal device described in the previous method embodiments, and the transceiver 910 can be used to execute the actions described in the previous method embodiments sent by the terminal device to the network device or received from the network device. action. For details, please refer to the description in the foregoing method embodiments, and details are not repeated here.

Optionally, the terminal device 900 may further include a power supply, configured to provide power to various devices or circuits in the terminal device.

In addition, in order to make the functions of the terminal equipment more perfect, the terminal equipment 900 may also include input and output devices, such as including one or more of an input unit, a display unit, an audio circuit, a camera, and a sensor. The circuitry may also include speakers, microphones, and the like.

FIG. 10 is a schematic structural diagram of a network device provided by an embodiment of the present application. The network device 1000 can be applied to the system shown in FIG. 1 to perform the functions of the network device in the foregoing method embodiments. As shown in FIG. 10 , the network device 1000 includes a processor 1020 and a transceiver 1010 . Optionally, the network device 1000 further includes a memory. Wherein, the processor 1020, the transceiver 1010, and the memory may communicate with each other through an internal connection path, and transmit control and/or data signals. The memory is used to store computer programs, and the processor 1020 is used to execute the computer programs in the memory to control the transceiver 1010 to send and receive signals.

The processor 1020 and the memory may be combined into a processing device, and the processor 1020 is configured to execute the program codes stored in the memory to realize the above functions. During specific implementation, the memory may also be integrated in the processor 920, or be independent of the processor 1020. The processor 1020 may correspond to the processing unit in FIG. 8 .

The above-mentioned transceiver 1010 may correspond to the transceiver unit in FIG. 8 . The transceiver 1010 may include a receiver (or called a receiver, a receiving circuit) and a transmitter (or called a transmitter, a transmitting circuit). Among them, the receiver is used to receive signals, and the transmitter is used to transmit signals.

It should be understood that the network device 1000 shown in FIG. 10 can implement various processes related to the network device in the method embodiments shown in FIGS. 3 and 4 . The operations and/or functions of the various modules in the network device 1000 are respectively for implementing the corresponding processes in the foregoing method embodiments. For details, reference may be made to the descriptions in the foregoing method embodiments, and detailed descriptions are appropriately omitted here to avoid repetition.

It should be understood that the network device 1000 shown in FIG. 10 may be an eNB or a gNB. Optionally, the network device includes network devices such as CU, DU, and AAU. Optionally, the CU can be specifically divided into CU-CP and CU-CP. UP. The present application does not limit the specific architecture of the network device.

It should be understood that the network device 1000 shown in FIG. 10 may be a CU node or a CU-CP node.

The above-mentioned processor 1020 can be used to execute the actions internally implemented by the network device described in the previous method embodiments, and the transceiver 1010 can be used to execute the actions described in the previous method embodiments sent by the network device to the terminal device or received from the terminal device. action. For details, please refer to the description in the foregoing method embodiments, and details are not repeated here.

The embodiment of the present application also provides a processing device, including a processor and a (communication) interface; the processor is configured to execute the method in any one of the above method embodiments.

It should be understood that the above processing device may be one or more chips. For example, the processing device may be a field programmable gate array (field programmable gate array, FPGA), an application specific integrated circuit (ASIC), or a system chip (system on chip, SoC). It can be a central processor unit (CPU), a network processor (network processor, NP), a digital signal processing circuit (digital signal processor, DSP), or a microcontroller (micro controller unit) , MCU), can also be a programmable controller (programmable logic device, PLD) or other integrated chips.

According to the method provided in the embodiment of the present application, the present application also provides a computer program product, the computer program product comprising: computer program code, when the computer program code is executed by one or more processors, the The device executes the methods in the embodiments shown in FIG. 3 and FIG. 4 .

The technical solutions provided by the embodiments of the present application may be fully or partially implemented by software, hardware, firmware or any combination thereof. When implemented using software, it may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on the computer, the processes or functions according to the embodiments of the present invention will be generated in whole or in part. The computer may be a general computer, a dedicated computer, a computer network, a network device, a terminal device, a core network device, a machine learning device or other programmable devices. The computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from a website, computer, server or data center Transmission to another website site, computer, server or data center by wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.). The computer-readable storage medium may be any available medium that can be accessed by a computer, or a data storage device such as a server or a data center integrated with one or more available media. The available medium may be a magnetic medium (for example, a floppy disk, a hard disk, or a magnetic tape), an optical medium (for example, a digital video disc (digital video disc, DVD)), or a semiconductor medium.

According to the method provided in the embodiment of the present application, the present application also provides a computer-readable storage medium, the computer-readable storage medium stores program code, and when the program code is run by one or more processors, the processing includes the The device of the device executes the method in the embodiment shown in FIG. 3 and FIG. 4 .

According to the method provided in the embodiment of the present application, the present application further provides a system, which includes the aforementioned one or more network devices. The system may further include the aforementioned one or more terminal devices.

In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods may be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or May be integrated into another system, or some features may be ignored, or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

The above is only a specific implementation of the application, but the scope of protection of the application is not limited thereto. Anyone familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the application. Should be covered within the protection scope of this application. Therefore, the protection scope of the present application should be determined by the protection scope of the claims.

Claims (48)

1. A method for acquiring channel state information, comprising:

   sending configuration information to the terminal device, where the configuration information is used to indicate multiple reference signal resources corresponding to one piece of channel state information, where the multiple reference signal resources include at least one first reference signal resource and multiple second reference signal resources, The first reference signal resource is used for channel measurement, and the second reference signal resource is a zero-power reference signal resource used for interference measurement;

   The channel state information is received from the terminal device.
2. The method according to claim 1, wherein the at least one first reference signal resource is used to carry a reference signal of at least one first transmission point, and the first transmission point is a serving transmission point of the terminal device .
3. The method according to claim 1 or 2, wherein the multiple reference signal resources further include at least one third reference signal resource, and the at least one third reference signal resource is used for intra-cell interference measurement, the At least one third reference signal resource is a non-zero power reference signal resource.
4. The method according to any one of claims 1 to 3, wherein the multiple second reference signal resources are used to carry reference signals of multiple second transmission points, and the multiple second transmission points are An interfering transmission point that the terminal device communicates with a first transmission point, where the first transmission point is a serving transmission point of the terminal device.
5. The method according to claim 4, wherein the at least one first reference signal resource is used to carry a reference signal of at least one first transmission point, and the first transmission point is a serving transmission point of the terminal device ,

   The multiple second reference signal resources include N second reference signal resources for measuring intra-site interference, and the second transmission point corresponding to the N second reference signal resources is related to one or more of the first The transmission points belong to the same network device, N is a positive integer, and/or,

   The multiple second reference signal resources include M second reference signal resources for measuring inter-station interference, and the second transmission point corresponding to the M second reference signal resources is related to one or more of the first A transmission point belongs to different network devices, and M is a positive integer.
6. A method for acquiring channel state information, comprising:

   receiving configuration information from a network device, where the configuration information is used to indicate multiple reference signal resources corresponding to one piece of channel state information, where the multiple reference signal resources include at least one first reference signal resource and multiple second reference signal resources , the first reference signal resource is used for channel measurement, and the second reference signal resource is a zero-power reference signal resource used for interference measurement;

   sending the channel state information to the network device.
7. The method according to claim 6, further comprising:

   Determine the channel state information according to channel information and first interference information, where the channel information is obtained by measuring the at least one first reference signal resource, and the first interference information is obtained by measuring the plurality of second reference signals resources obtained.
8. The method according to claim 6 or 7, characterized in that the method further comprises:

   Measure the multiple second reference signal resources to obtain multiple interference covariance information;

   Determine first interference information according to the pieces of interference covariance information.
9. The method according to any one of claims 6 to 8, wherein the at least one first reference signal resource is used to carry a reference signal of at least one first transmission point, and the first transmission point is a terminal device service delivery point.
10. The method according to any one of claims 6 to 9, wherein the multiple reference signal resources further include at least one third reference signal resource, and the at least one third reference signal resource is used in the serving cell For interference measurement, the at least one third reference signal resource is a non-zero power reference signal resource.
11. The method according to any one of claims 6 to 10, wherein the multiple second reference signal resources are used to carry reference signals of multiple second transmission points, and the multiple second transmission points are An interfering transmission point for the terminal device to communicate with the first transmission point, where the first transmission point is a serving transmission point for the terminal device.
12. The method according to claim 11, wherein the at least one first reference signal resource is used to carry a reference signal of at least one first transmission point, and the first transmission point is a serving transmission point of the terminal device ,

    The multiple second reference signal resources include N second reference signal resources for measuring intra-site interference, and the second transmission point corresponding to the N second reference signal resources is related to one or more of the first The transmission points belong to the same access network device, N is a positive integer, and/or,

    The multiple second reference signal resources include M second reference signal resources for measuring inter-station interference, and the second transmission point corresponding to the M second reference signal resources is related to one or more of the first A transmission point does not belong to the same access network device, and M is a positive integer.
13. A method for acquiring channel state information, comprising:

    receiving control information, the control information is used to schedule the physical downlink shared channel PDSCH, the control information includes first indication information, and the first indication information is used to indicate the first DMRS port in the demodulation reference signal DMRS port set, The first DMRS port is a DMRS port corresponding to the PDSCH;

    Send channel state information, the channel state information is determined according to the first DMRS port and the second DMRS port, wherein the first DMRS port is used for channel measurement, the second DMRS is used for interference measurement, and the second DMRS A port belongs to the DMRS port set.
14. The method according to claim 13, further comprising:

    Measuring the first DMRS port to obtain first measurement information, where the first measurement information includes channel information and interference information;

    Measure the second DMRS port to obtain second measurement information, where the second measurement information includes interference information;

    obtaining channel information according to the first measurement information and the second measurement information,

    Wherein, the channel state information is specifically determined according to the channel information and the interference information.
15. The method according to claim 14, wherein the second DMRS port includes a third DMRS port, and the third DMRS port is used for intra-cell interference measurement, and,

    The measuring the second DMRS port to obtain second measurement information includes:

    Measure the third DMRS port to obtain third measurement information, where the third measurement information includes inter-cell interference information and intra-cell interference information;

    measuring ports other than the third DMRS port in the second DMRS port to obtain fourth measurement information, the fourth measurement information, the fourth measurement information including the inter-cell interference information;

    Wherein, the second measurement information includes the third measurement information and the fourth measurement information.
16. The method according to claim 15, further comprising:

    Obtain the intra-cell interference information according to the third measurement information and the fourth measurement information;

    Wherein, the channel state information is specifically determined according to the channel information, the inter-cell interference information, and the intra-cell interference information.
17. The method according to claim 14, characterized in that the method further comprises:

    Measure zero-power reference signal resources to obtain inter-cell interference information;

    Obtaining intra-cell interference information according to the second measurement information and the inter-cell interference information, where the second measurement information specifically includes intra-cell interference information and inter-cell interference information,

    Wherein, the channel state information is specifically determined according to the channel information, the inter-cell interference information, and the intra-cell interference information.
18. The method according to claim 13, further comprising:

    Measuring the first DMRS port to obtain first measurement information, where the first measurement information includes channel information and interference information;

    Measure the second DMRS port to obtain second measurement information, where the second measurement information includes intra-cell interference information;

    Measure zero-power reference signal resources to obtain inter-cell interference information,

    Wherein, the channel state information is specifically determined according to the channel information, the inter-cell interference information, and the intra-cell interference information.
19. A method for acquiring channel state information, comprising:

    The first cell sends control information to the terminal device, the control information is used to schedule the Physical Downlink Shared Channel PDSCH, the control information includes first indication information, and the first indication information is used to indicate the demodulation reference signal DMRS port set The first DMRS port of the first DMRS port is the DMRS port corresponding to the PDSCH;

    The first cell receives channel state information from the terminal device, the channel state information is determined according to the first DMRS port and the second DMRS port, wherein the first DMRS port is used for channel measurement, and the second The DMRS is used for interference measurement, and the second DMRS port belongs to the DMRS port set.
20. The method according to claim 19, wherein the second DMRS port includes a third DMRS port, and the third DMRS port is used for intra-cell interference measurement, and the method further includes:

    The first cell sends a DMRS on the first DMRS port, and the first DMRS port further includes a DMRS of a second cell;

    The first cell sends a DMRS on the third DMRS port, the third DMRS port belongs to the second DMRS port, and the third DMRS port includes the DMRS of the first cell and the DMRS of the second cell DMRS;

    Wherein, the DMRS ports in the second DMRS ports except the third DMRS port are zero-power DMRSs of the first cell.
21. The method according to claim 20, wherein the zero power reference signal resources of the first cell are used for inter-cell interference information measurement, the method further comprising:

    The first cell sends a DMRS on the second DMRS port.
22. The method according to claim 20, wherein the zero-power reference signal resource of the first cell is used for inter-cell interference measurement, and the method further comprises:

    The first cell sends DMRS on the first DMRS port and the second DMRS port, the first DMRS port and the second DMRS port are zero-power DMRS ports of the second cell,

    Wherein, the second DMRS port is specifically used for intra-cell interference measurement.
23. A device for acquiring channel state information, comprising:

    A processing unit, configured to determine configuration information, where the configuration information is used to indicate multiple reference signal resources corresponding to one piece of channel state information, where the multiple reference signal resources include at least one first reference signal resource and multiple second reference signal resources resources, the first reference signal resource is used for channel measurement, and the second reference signal resource is a zero-power reference signal resource used for interference measurement;

    a transceiver unit, configured to send the configuration information to the terminal device;

    The transceiving unit is further configured to receive the channel state information from the terminal device.
24. The apparatus according to claim 23, wherein the at least one first reference signal resource is used to carry a reference signal of at least one first transmission point, and the first transmission point is a serving transmission point of the terminal device .
25. The apparatus according to claim 23 or 24, wherein the multiple reference signal resources further include at least one third reference signal resource, and the at least one third reference signal resource is used for intra-cell interference measurement, the At least one third reference signal resource is a non-zero power reference signal resource.
26. The device according to any one of claims 23 to 25, wherein the multiple second reference signal resources are used to carry reference signals of multiple second transmission points, and the multiple second transmission points are An interfering transmission point that the terminal device communicates with a first transmission point, where the first transmission point is a serving transmission point of the terminal device.
27. The apparatus according to claim 26, wherein the at least one first reference signal resource is used to carry a reference signal of at least one first transmission point, and the first transmission point is a serving transmission point of the terminal device ,

    The multiple second reference signal resources include N second reference signal resources for measuring intra-site interference, and the second transmission point corresponding to the N second reference signal resources is related to one or more of the first The transmission points belong to the same network device, N is a positive integer, and/or,

    The multiple second reference signal resources include M second reference signal resources for measuring inter-station interference, and the second transmission point corresponding to the M second reference signal resources is related to one or more of the first A transmission point belongs to different network devices, and M is a positive integer.
28. A device for acquiring channel state information, comprising:

    A transceiver unit, configured to receive configuration information from a network device, where the configuration information is used to indicate a plurality of reference signal resources corresponding to one piece of channel state information, and the plurality of reference signal resources include at least one first reference signal resource and a plurality of A second reference signal resource, the first reference signal resource is used for channel measurement, and the second reference signal resource is a zero-power reference signal resource used for interference measurement;

    a processing unit for determining the channel state information

    The transceiver unit is further configured to send the channel state information to the network device.
29. The apparatus according to claim 28, characterized in that,

    The processing unit is specifically configured to determine the channel state information according to channel information and first interference information, the channel information is obtained by measuring the at least one first reference signal resource, and the first interference information is obtained by measuring obtained from the plurality of second reference signal resources.
30. The device according to claim 28 or 29, wherein the processing unit is further used for:

    Measure the multiple second reference signal resources to obtain multiple interference covariance information;

    Determine first interference information according to the pieces of interference covariance information.
31. The apparatus according to any one of claims 28 to 30, wherein the at least one first reference signal resource is used to carry a reference signal of at least one first transmission point, and the first transmission point is a terminal device service delivery point.
32. The device according to any one of claims 28 to 31, wherein the plurality of reference signal resources further include at least one third reference signal resource, and the at least one third reference signal resource is used in the serving cell For interference measurement, the at least one third reference signal resource is a non-zero power reference signal resource.
33. The device according to any one of claims 28 to 32, wherein the multiple second reference signal resources are used to carry reference signals of multiple second transmission points, and the multiple second transmission points are An interfering transmission point for the terminal device to communicate with the first transmission point, where the first transmission point is a serving transmission point for the terminal device.
34. The apparatus according to claim 33, wherein the at least one first reference signal resource is used to carry a reference signal of at least one first transmission point, and the first transmission point is a serving transmission point of the terminal device ,

    The multiple second reference signal resources include N second reference signal resources for measuring intra-site interference, and the second transmission point corresponding to the N second reference signal resources is related to one or more of the first The transmission points belong to the same access network device, N is a positive integer, and/or,

    The multiple second reference signal resources include M second reference signal resources for measuring inter-station interference, and the second transmission point corresponding to the M second reference signal resources is related to one or more of the first A transmission point does not belong to the same access network device, and M is a positive integer.
35. A device for acquiring channel state information, comprising:

    A transceiver unit, configured to receive control information, the control information is used to schedule the physical downlink shared channel PDSCH, the control information includes first indication information, and the first indication information is used to indicate the demodulation reference signal DMRS port set A first DMRS port, where the first DMRS port is a DMRS port corresponding to the PDSCH;

    A processing unit, configured to determine channel state information according to the first DMRS port and the second DMRS port, wherein the first DMRS port is used for channel measurement, the second DMRS is used for interference measurement, and the second DMRS port belongs to the DMRS port set;

    The transceiver unit is also used to send the channel state information.
36. The device according to claim 35, wherein the processing unit is specifically used for:

    Measuring the first DMRS port to obtain first measurement information, where the first measurement information includes channel information and interference information;

    Measure the second DMRS port to obtain second measurement information, where the second measurement information includes interference information;

    obtaining channel information according to the first measurement information and the second measurement information,

    Wherein, the channel state information is specifically determined according to the channel information and the interference information.
37. The device according to claim 36, wherein the second DMRS port includes a third DMRS port, and the third DMRS port is used for intra-cell interference measurement, and the processing unit is specifically configured to:

    Measure the third DMRS port to obtain third measurement information, where the third measurement information includes inter-cell interference information and intra-cell interference information;

    measuring ports other than the third DMRS port in the second DMRS port to obtain fourth measurement information, the fourth measurement information, the fourth measurement information including the inter-cell interference information;

    Wherein, the second measurement information includes the third measurement information and the fourth measurement information.
38. The device according to claim 37, wherein the processing unit is further used for:

    Obtain the intra-cell interference information according to the third measurement information and the fourth measurement information;

    Wherein, the channel state information is specifically determined according to the channel information, the inter-cell interference information, and the intra-cell interference information.
39. The device according to claim 36, wherein the processing unit is further configured to:

    Measure zero-power reference signal resources to obtain inter-cell interference information;

    Obtaining intra-cell interference information according to the second measurement information and the inter-cell interference information, where the second measurement information specifically includes intra-cell interference information and inter-cell interference information,

    Wherein, the channel state information is specifically determined according to the channel information, the inter-cell interference information, and the intra-cell interference information.
40. The device according to claim 35, wherein the processing unit is further used for:

    Measuring the first DMRS port to obtain first measurement information, where the first measurement information includes channel information and interference information;

    Measure the second DMRS port to obtain second measurement information, where the second measurement information includes intra-cell interference information;

    Measure zero-power reference signal resources to obtain inter-cell interference information,

    Wherein, the channel state information is specifically determined according to the channel information, the inter-cell interference information, and the intra-cell interference information.
41. A device for acquiring channel state information, comprising:

    A processing unit, configured to determine control information, the control information is used to schedule the physical downlink shared channel PDSCH, the control information includes first indication information, and the first indication information is used to indicate the demodulation reference signal DMRS port set A first DMRS port, where the first DMRS port is a DMRS port corresponding to the PDSCH;

    a transceiver unit, configured to send the control information to the terminal device,

    The transceiver unit is further configured to receive channel state information from the terminal device, the channel state information is determined according to the first DMRS port and the second DMRS port, wherein the first DMRS port is used for channel measurement, The second DMRS is used for interference measurement, and the second DMRS port belongs to the DMRS port set.
42. The device according to claim 41, wherein the second DMRS port includes a third DMRS port, the third DMRS port is used for intra-cell interference measurement, and the transceiver unit is further used for:

    Sending a DMRS on the first DMRS port, where the first DMRS port also includes a DMRS of the second cell;

    sending a DMRS on the third DMRS port, the third DMRS port belongs to the second DMRS port, and the third DMRS port includes a DMRS of the first cell and a DMRS of the second cell;

    Wherein, the DMRS ports in the second DMRS ports except the third DMRS port are zero-power DMRSs of the first cell.
43. The device according to claim 42, wherein the zero power reference signal resources of the first cell are used for inter-cell interference information measurement, and the transceiver unit is further configured to send DMRS on the second DMRS port.
44. The device according to claim 42, wherein the zero-power reference signal resource of the first cell is used for inter-cell interference measurement, and the transceiver unit is further configured to communicate between the first DMRS port and the second sending DMRS on the DMRS port, the first DMRS port and the second DMRS port are zero-power DMRS ports of the second cell,

    Wherein, the second DMRS port is specifically used for intra-cell interference measurement.
45. A communication device, characterized by comprising at least one processor coupled to a memory;

    The memory is used to store programs or instructions;

    The at least one processor is configured to execute the program or instructions, so that the apparatus implements the method as claimed in any one of claims 1-22.
46. A chip, characterized in that it includes at least one processor and a communication interface;

    The communication interface is used to receive a signal input to the chip or a signal output from the chip, and the processor communicates with the communication interface and implements any one of claims 1 to 22 through a logic circuit or executing code instructions. method described in the item.
47. A computer-readable storage medium, characterized in that instructions are stored therein, and when the instructions are run on a computer, the computer is made to execute the method according to any one of claims 1 to 22.
48. A computer program product, characterized by comprising instructions, which, when run on a computer, cause the computer to execute the method according to any one of claims 1 to 22.

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