CN111107633B - CSI reporting method, acquisition method and equipment - Google Patents

Abstract

The embodiment of the application discloses a Channel State Information (CSI) reporting method and equipment, which are used for reducing the CSI reporting overhead. The method is performed by a first device, comprising: receiving configuration information, wherein the configuration information is used for indicating a second resource set associated with the first resource set; receiving a channel state information reference signal (CSI-RS) on a first transmission antenna set corresponding to the second resource set according to the configuration information, wherein the CSI-RS corresponds to the first resource set; and measuring the CSI-RS, and reporting the first CSI according to a measurement result. The embodiment of the application also discloses a CSI acquisition method and equipment.

Description

CSI reporting method, acquisition method and equipment

technical field

The present application relates to the communication field, and in particular to a channel state information (Channel State Information, CSI) reporting method, acquisition method and device.

Background technique

A multiple-input multiple-output (Multiple-Input Multiple-Output, MIMO) technology has become one of the key technologies in current mobile communication systems. The multi-antenna technology has many advantages, such as using the space division multiplexing of multiple antennas to increase the system capacity, and using the multiplexing gain of multiple antennas to expand the throughput of the system.

The existing way of obtaining downlink CSI is: the network device sends a channel state information reference signal (Channel State Information-Reference Signal, CSI-RS) or synchronization signal block (PBCH/SSBlock) to the terminal device, and the terminal device performs measurement and feeds back the CSI, Network devices get it by receiving. In particular, in a Time Division Duplexing (TDD) system, due to the reciprocity of the uplink and downlink channels, the terminal device can send a Sounding Reference Signal (SRS) to the network device, and the network device performs measurement to obtain the CSI .

In related technologies, if a network device acquires all downlink CSI by sending CSI-RS, then a terminal device needs to receive CSI-RS on all receiving antennas to report CSI, and the overhead of CSI reporting is relatively large.

Contents of the invention

The purpose of the embodiments of the present application is to provide a method for reporting CSI, a method for obtaining it, and a device, so as to solve the problem of high overhead of CSI reporting by a terminal device.

In a first aspect, a method for reporting CSI is provided, the method is executed by a first device, and the method includes:

receiving configuration information, the configuration information being used to indicate a second set of resources associated with the first set of resources;

According to the configuration information, receive a CSI-RS on a first transmission antenna set corresponding to the second resource set, where the CSI-RS corresponds to the first resource set;

The CSI-RS is measured, and the first CSI is reported according to the measurement result.

In a second aspect, a method for acquiring CSI is provided, the method is executed by a second device, and the method includes:

sending configuration information, where the configuration information is used to indicate a second set of resources associated with the first set of resources, so that the first device receives on the first set of transmission antennas corresponding to the second set of resources according to the configuration information CSI-RS, wherein the CSI-RS corresponds to the first resource set;

and receiving first CSI, where the first CSI is obtained by measuring the CSI-RS by the first device.

In a third aspect, a first device is provided, and the first device includes:

A configuration information receiving module, configured to receive configuration information, where the configuration information is used to indicate a second resource set associated with the first resource set;

A CSI-RS receiving module, configured to receive a CSI-RS on a first transmission antenna set corresponding to the second resource set according to the configuration information, where the CSI-RS corresponds to the first resource set;

A measurement reporting module, configured to measure the CSI-RS, and report the first CSI according to the measurement result.

In a fourth aspect, a second device is provided, and the second device includes:

A sending module, configured to send configuration information, where the configuration information is used to indicate a second resource set associated with the first resource set, so that the first device, according to the configuration information, performs receiving a CSI-RS on a transmission antenna set, where the CSI-RS corresponds to the first resource set;

A receiving module, configured to receive first CSI, where the first CSI is obtained by the first device measuring the CSI-RS.

According to a fifth aspect, a device is provided, which includes a processor, a memory, and a computer program stored on the memory and operable on the processor, when the computer program is executed by the processor, the following is implemented: The steps of the method described in the first aspect and the second aspect.

A sixth aspect provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the steps of the methods described in the first aspect and the second aspect are implemented .

In the embodiment of the present invention, the first device can determine the second resource set according to the received configuration information, and receive the CSI-RS on the first transmission antenna set corresponding to the second resource set and report the CSI. The device only receives CSI-RS on the first transmission antenna set corresponding to the second resource set for CSI reporting, instead of receiving CSI-RS on all transmission antenna sets for CSI reporting, which reduces CSI reporting overhead.

Description of drawings

The drawings described here are used to provide a further understanding of the application and constitute a part of the application. The schematic embodiments and descriptions of the application are used to explain the application and do not constitute an improper limitation to the application. In the attached picture:

FIG. 1 is a schematic flowchart of a CSI reporting method according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of a specific application of a CSI reporting method according to an embodiment of the present invention;

FIG. 3 is another schematic diagram of a specific application of the CSI reporting method according to an embodiment of the present invention;

FIG. 4 is a schematic flowchart of a CSI acquisition method according to another embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a first device according to an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of a second device according to an embodiment of the present invention;

FIG. 7 is a schematic structural diagram of a terminal device according to an embodiment of the present invention;

Fig. 8 is a schematic structural diagram of a network device according to an embodiment of the present invention.

Detailed ways

In order to make the purpose, technical solution and advantages of the present application clearer, the technical solution of the present application will be clearly and completely described below in conjunction with specific embodiments of the present application and corresponding drawings. Apparently, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. 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.

It should be understood that the technical solutions of the embodiments of the present invention can be applied to various communication systems, such as: Global System of Mobile communication (Global System of Mobile communication, GSM) system, Code Division Multiple Access (Code Division Multiple Access, CDMA) system, wideband code division Multiple Access (Wideband Code Division Multiple Access, WCDMA) system, General Packet Radio Service (General Packet Radio Service, GPRS), 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 (Universal Mobile Telecommunications System, UMTS) or Worldwide Interoperability for Microwave Access (WiMAX) communication system, 5G system, or New Radio (New Radio) , NR) system, or a subsequent evolution communication system.

In the embodiment of the present invention, the terminal equipment may include but not limited to mobile station (Mobile Station, MS), mobile terminal (Mobile Terminal), mobile phone (Mobile Telephone), user equipment (User Equipment, UE), mobile phone (handset) And portable equipment (portable equipment), vehicle (vehicle), etc., the terminal equipment can communicate with one or more core networks via a radio access network (Radio Access Network, RAN), for example, the terminal equipment can be a mobile phone (or known as "cellular" telephones), computers with wireless communication capabilities, etc., terminal equipment can also be portable, pocket, hand-held, computer built-in or vehicle-mounted mobile devices.

In the embodiment of the present invention, the network device is a device deployed in a radio access network to provide a wireless communication function for a terminal device. The network device may be a base station, and the base station may include various forms of macro base stations, micro base stations, relay stations, access points, and the like. In systems using different radio access technologies, the names of equipment with base station functions may be different. For example, in an LTE network, it is called an evolved Node B (Evolved NodeB, eNB or eNodeB), in a third generation (3rd Generation, 3G) network, it is called a Node B (Node B), or in a subsequent evolved communication system network equipment, etc., but the wording does not constitute a limitation.

As shown in FIG. 1 , an embodiment of the present invention provides a channel state information (Channel State Information, CSI) reporting method 100, the method can be executed by a first device, and the first device can specifically be the aforementioned terminal device, This embodiment 100 comprises the following steps:

S102: Receive configuration information, where the configuration information is used to indicate a second resource set associated with the first resource set.

In this embodiment, the configuration information usually comes from the second device, and the second device can be the network device mentioned above; it can also be the terminal device mentioned above, that is, the method provided by this embodiment can be applied in V2V communication (Vehicle to Vehicle communication), terminal direct (Device to Device, D2D) and other scenarios.

The above-mentioned first resource set is usually a resource set on the second device side (such as the network device side). Optionally, the above-mentioned first resource set includes: a channel state information reference signal (Channel State Information-Reference Signal, CSI-RS) resource set, a CSI-RS antenna port set, or a CSI reporting resource set, etc., and the second device may base on the first The resource set sends the CSI-RS to obtain the first CSI.

For the above-mentioned CSI-RS resource set, CSI-RS antenna port set and CSI reporting resource set, wherein, the CSI-RS resource set may include one or more CSI-RS resources; the CSI-RS antenna port set may include one or multiple CSI-RS antenna ports; the CSI reporting resource set may include one or more CSI reporting resources.

Optionally, the purpose of the above-mentioned first resource set is beam management. For example, the second device can obtain the first CSI based on the first resource set (see the subsequent steps in this embodiment), and perform beamforming based on the first CSI, etc., It is convenient to improve the communication quality.

The above-mentioned second resource set is usually a resource set on the first device side (such as the terminal device side). Optionally, the above-mentioned second resource set includes a Sounding Reference Signal (Sounding Reference Symbol, SRS) resource set, an SRS antenna port set, or an antenna panel set, and the first device may send the SRS based on the second resource set, so that the second device acquires Second CSI.

For the above mentioned SRS resource set, SRS antenna port set and antenna panel set, wherein, the SRS resource set may include one or more SRS resources; the SRS antenna port set may include one or more SRS antenna ports; the antenna panel set may Contains one or more antenna panels (logo).

The above configuration information is used to indicate the second resource set associated with the first resource set, for example, specifically used to indicate the SRS resource set associated with the CSI-RS resource set; used to indicate the SRS antenna port associated with the CSI-RS resource set set; used to indicate the antenna panel set (first device side) associated with the CSI-RS resource set, and so on. In this way, the first device can obtain the second resource set associated with the first resource set based on the above configuration information.

S104: According to the configuration information, receive a CSI-RS on a first transmission antenna set corresponding to the second resource set, where the CSI-RS corresponds to the first resource set.

In this embodiment, if the second device configures the first device to report CSI, the first device can receive the CSI-RS, specifically, receive the CSI-RS on the first transmission antenna set corresponding to the second resource set, where , there is a corresponding relationship between the second resource set and the first transmission antenna set.

The first set of transmission antennas mentioned in this embodiment may specifically be a set of antennas, a set of antenna ports, or a set of antenna panels (Panel) of the first device.

In this embodiment, the first device may include other sets of transmission antennas in addition to the above-mentioned first set of transmission antennas. In subsequent embodiments, the set of transmission antennas other than the first set of transmission antennas of the first device It is called the second transmit antenna set.

That is, the first set of transmit antennas of the first device includes the first set of antennas, the first set of antenna ports, or the first set of antenna panels; correspondingly, the second set of transmit antennas of the first device includes the second set of antennas, the second set of Antenna port set or second antenna panel set.

In addition, the above-mentioned received CSI-RS corresponds to the first resource set, and the CSI-RS mentioned here corresponds to the first resource set. Specifically, the CSI-RS may be sent on the above-mentioned first resource set.

S106: Measure the CSI-RS, and report the first CSI according to the measurement result.

In this embodiment, the first CSI indicates a state of a channel corresponding to the first transmission antenna set. The first CSI may be channel quality information (Channel Quality Indicator, CQI); precoding matrix identification (Pre-CodingMatrix Indicator, PMI); rank identification (Rank Indicator, RI); layer identification (LI); One or any combination of (L1-SINR) and Layer 1 Reference Signal Received Power (L1-RSRP).

In this embodiment, the measurement reporting of the first CSI may be divided into periodic reporting and aperiodic reporting. Periodic reporting of the first CSI is usually performed through a physical uplink control channel (Physical Uplink Control Channel, PUCCH). If the first device is scheduled to send data in the subframe in which the first CSI is periodically reported, then the periodic first CSI report will be performed through a physical uplink shared channel (Physical Uplink Shared Channel, PUSCH). The aperiodic reporting of the first CSI is performed through the PUSCH.

In the CSI reporting method provided by the embodiment of the present invention, the first device can determine the second resource set according to the received configuration information, and receive the CSI-RS on the first transmission antenna set corresponding to the second resource set and perform CSI reporting, Since the first device only receives CSI-RS on the first transmission antenna set corresponding to the second resource set for CSI reporting, instead of receiving CSI-RS on all transmission antenna sets for CSI reporting, the CSI reporting overhead is reduced .

If the set of transmitting antennas and the set of receiving antennas of the first device are not equal, for example, the set of transmitting antennas is smaller than the set of receiving antennas. It may be a network device) to obtain all the CSI. Since there is a certain delay in the antenna switching transmission process, it is easy to cause the problem that all the CSI is not obtained in time.

In order to reduce the acquisition time of all downlink CSI, the above embodiment shown in FIG. 1 may further include the following steps:

sending the SRS on the second transmission antenna set of the first device, so that the second device obtains the second CSI, wherein,

The second CSI indicates a state of a channel corresponding to a second transmission antenna set of the first device.

The second set of transmit antennas is a set of transmit antennas other than the first set of transmit antennas of the first device.

The SRS corresponds to a third resource set, and the third resource set includes an SRS resource set or an SRS antenna port set, that is, the SRS may be sent according to the third resource set.

This embodiment can be applied in a scenario where uplink and downlink channels are reciprocal, for example, in a TDD system.

As mentioned above, the first CSI indicates the state of the channel corresponding to the first transmission antenna set. The first device sends SRS on the second transmission antenna set, so that the second device obtains the second CSI, and the second CSI indicates the state of the channel corresponding to the second transmission antenna set. In this way, the second device obtains the first CSI and the second CSI by obtaining The second CSI means that all downlink CSI can be obtained without antenna switching and transmission, avoiding the time delay caused by antenna switching and transmission, and reducing the acquisition time of all downlink CSI.

In addition, in the embodiment of the present invention, part of all downlink CSI is realized by sending downlink CSI-RS by the second device, and the other part is realized by sending SRS by the first device. The way of the downlink CSI can reduce the overhead of the first device feeding back the CSI; at the same time, it solves the problem that the network device cannot send the CSI-RS under certain conditions, that is, cannot obtain all the downlink CSI.

The receiving of the CSI-RS on the first transmission antenna set corresponding to the second resource set mentioned in step S104 of the above several embodiments may specifically be: receiving the CSI-RS in the first time domain resource unit; the above-mentioned Sending the SRS on the second transmission antenna set of the first device may specifically be: sending the first SRS in the second time domain resource unit. The above-mentioned first time-domain resource unit and second time-domain resource unit may specifically be other time-domain resource units such as symbols or time slots.

Optionally, the interval between the first time domain resource unit and the second time domain resource unit is smaller than a preset value. For example, the first time-domain resource unit is adjacent to the second time-domain resource, that is, the above-mentioned preset value may be 1; for another example, the interval between the first time-domain resource unit and the second time-domain resource unit is less than M symbols, wherein, M is a non-negative integer, for example, M=14 (corresponding to the normal cyclic prefix) or 12 (corresponding to the extended cyclic prefix); for another example, the interval between the first time domain resource unit and the second time domain resource unit is less than N time slots, wherein, N is a non-negative integer, eg, N=2.

This embodiment does not limit the sequence (time) of the first time-domain resource unit and the second time-domain resource unit. Specifically, the first time-domain resource unit may be in front, and the second time-domain resource unit may be in the back, or , the second time-domain resource unit comes first, and the first time-domain resource unit follows.

Through the configuration that the interval between the first time domain resource unit and the second time domain resource unit is smaller than the preset value, in this way, the second device can obtain the first CSI and the second CSI in the shortest possible time, and also That is, all the downlink CSI is obtained, the time for obtaining all the downlink CSI is further reduced, and the rate of obtaining the downlink CSI is increased.

As mentioned above, the second resource set includes a Sounding Reference Signal SRS resource set, an SRS antenna port set, or an antenna panel set; the third resource set includes an SRS resource set or an SRS antenna port set. In one embodiment, the second resource set The intersection with the third resource collection is empty. In this way, the first device can not only send the SRS on the second set of transmission antennas, but also send the SRS on the first set of transmission antennas that receive the CSI-RS.

As shown in FIG. 2 , FIG. 2 is a schematic diagram of a specific application of a CSI reporting method according to an embodiment of the present invention. In this embodiment, the first device is the UE shown in FIG. 2 , and the second device may be a network device, including multiple transmission and reception points TRP, and each TRP corresponds to a different downlink. For details, see TRP1 and TRP2 shown in FIG. 2 , where TRP1 and TRP2 respectively correspond to different downlinks.

Panel 0 in this embodiment corresponds to the first set of transmission antennas in the foregoing embodiments, and Panel 1 corresponds to the second set of transmission antennas in the foregoing embodiments.

In this embodiment, the first resource set is associated with the SRS sent on the antenna panel Panel 0, and the second resource set corresponds to Panel 0. In this way, if the network device configures the UE to report CSI, the UE can receive the CSI-RS on Panel 0, measure the CSI-RS received on Panel 0, and report the first CSI according to the measurement result.

In addition, the UE may also send an SRS on the Panel 1, so that the network device calculates the second CSI based on the SRS sent by the UE Panel 1.

In this embodiment, Panel 0 of the UE receives CSI-RS in the first time domain resource unit, Panel 1 of the UE transmits SRS in the second time domain resource unit, and the distance between the first time domain resource unit and the second time domain resource unit If the interval is smaller than the preset value, the acquisition time of all downlink CSI is further reduced, and the acquisition rate of downlink CSI is increased.

In addition, the first CSI in this embodiment includes at least one of the following: a first eigenvalue; a first eigenvector or a first PMI; a first RI; a first CQI; and a first LI.

The second CSI calculated by the network device based on the SRS includes at least one of the following: a second eigenvalue; a second eigenvector or a second PMI; a second RI; and a second LI.

In this embodiment, the UE sends the SRS, and the network device generally cannot obtain the downlink interference situation. In this way, the network device can also derive and calculate the second CSI based on the first CSI (specifically, the first CQI in the first CSI) and the second CSI. Two CQI, that is, the CQI of the channel corresponding to Pane 1 is obtained.

In this embodiment, the network device can send a physical downlink shared channel (Physical Downlink Shared Channel, PDSCH) on different transmission links based on the first CSI and the second CSI, so as to improve communication efficiency.

As shown in FIG. 3 , FIG. 3 is a schematic diagram of a specific application of a CSI reporting method according to an embodiment of the present invention. In this embodiment, the first device is the UE shown in FIG. 3 , and the second device may be a network device, including the TRP shown in FIG. 3 . Antenna sets 0 and 2 in this embodiment correspond to the first set of transmission antennas in the foregoing embodiments, and sets of antennas 1 and 3 correspond to the second set of transmission antennas in the foregoing embodiments.

This embodiment is downlink multi-antenna transmission, each antenna set corresponds to a different downlink transmission layer, the first resource set is associated with the SRS sent on antenna sets 0 and 2, and the second resource set corresponds to antenna sets 0 and 2. In this way, if the network device configures the UE to report CSI, the UE can receive CSI-RS on antenna sets 0 and 2, measure the CSI-RS received on antenna sets 0 and 2, and report the first CSI.

In addition, the UE may also send SRSs on antenna sets 1 and 3, so that the network device calculates the second CSI based on the SRSs sent by the UE antenna sets 1 and 3.

In this embodiment, antenna sets 0 and 2 of the UE receive CSI-RS in the first time domain resource unit, antenna sets 1 and 3 of the UE transmit SRS in the second time domain resource unit, and the first time domain resource unit and the second time domain resource unit The interval between the resource units in the time domain is smaller than a preset value, which further reduces the acquisition time of all downlink CSI and improves the acquisition rate of downlink CSI.

In addition, the first CSI in this embodiment includes at least one of the following: a first eigenvalue; a first eigenvector or a first PMI; a first RI; a first CQI; and a first LI.

The second CSI calculated by the network device based on the SRS includes at least one of the following: a second eigenvalue; a second eigenvector or a second PMI; a second RI; and a second LI.

The network device may also calculate a third CSI based on the first CSI and the second CSI, where the third CSI includes at least one of the following:

1) The second CQI, wherein the second CQI is obtained based on the first CQI and the second CSI, and the first CSI includes the first CQI;

2) The third precoding matrix identifies the PMI, wherein the third PMI is obtained based on the first PMI and the second PMI, the first CSI includes the first PMI, and the second CSI includes the second PMI;

3) A third rank identifier RI, wherein the third RI is obtained based on the first RI and the second RI, the first CSI includes the first LI, and the second CSI includes the second LI;

4) The third layer identifies the CQI, wherein the third CQI is obtained based on the first CQI and the second CQI, the first CSI includes the first CQI, and the second CQI is based on the first CQI and the obtained The second CSI is obtained; and

5) A third LI, wherein the third LI is obtained based on the first CQI, the second CQI, the first LI, and the second LI, and the first CSI includes the first CQI and the first LI; The second CSI includes the second LI, and the second CQI is obtained based on the first CQI and the second CSI.

In this embodiment, the network device can send the PDSCH based on the third CSI, so as to improve communication efficiency.

Fig. 4 is a schematic diagram of the implementation flow of the CSI acquisition method in the embodiment of the present invention, which can be applied to the second device side. As mentioned above, the second device can specifically be the network device mentioned above, or the terminal device mentioned above , that is, the method provided in this embodiment can be applied in scenarios such as V2V communication and terminal direct communication. As shown in FIG. 4, the method 400 includes:

S402: Send configuration information, where the configuration information is used to indicate a second resource set associated with the first resource set, so that the first device uses the first transmission antenna set corresponding to the second resource set according to the configuration information Receive the CSI-RS on the above, where the CSI-RS corresponds to the first resource set.

In this embodiment, the configuration information may be sent to the first device, and the first device may specifically be the aforementioned terminal device.

Optionally, the above-mentioned first resource set includes: a channel state information reference signal (Channel State Information-Reference Signal, CSI-RS) resource set, a CSI-RS antenna port set, or a CSI reporting resource set, etc., and the second device may base on the first The resource set sends the CSI-RS to acquire the first CSI.

For the above-mentioned CSI-RS resource set, CSI-RS antenna port set and CSI reporting resource set, wherein, the CSI-RS resource set may include one or more CSI-RS resources; the CSI-RS antenna port set may include one or multiple CSI-RS antenna ports; the CSI reporting resource set may include one or more CSI reporting resources.

Optionally, the purpose of the above-mentioned first resource set is beam management. For example, the second device can obtain the first CSI based on the first resource set (see the subsequent steps in this embodiment), and perform beamforming based on the first CSI, etc., It is convenient to improve the communication quality.

The above-mentioned second resource set is usually a resource set on the first device side (such as the terminal device side). Optionally, the above-mentioned second resource set includes a Sounding Reference Signal (Sounding Reference Symbol, SRS) resource set, an SRS antenna port set, or an antenna panel set, and the first device may send the SRS based on the second resource set, so that the second device acquires Second CSI.

For the above mentioned SRS resource set, SRS antenna port set and antenna panel set, wherein, the SRS resource set may include one or more SRS resources; the SRS antenna port set may include one or more SRS antenna ports; the antenna panel set may Contains one or more antenna panels (logo).

In this embodiment, if the second device configures the first device to report CSI, the first device can receive the CSI-RS, specifically, receive the CSI-RS on the first transmission antenna set corresponding to the second resource set, where , there is a corresponding relationship between the second resource set and the first transmission antenna set.

The first set of transmission antennas mentioned in this embodiment may specifically be a set of antennas, a set of antenna ports, or a set of antenna panels (Panel) of the first device.

In this embodiment, in addition to the above-mentioned first set of transmission antennas, the first device may also include other sets of transmission antennas. In this embodiment, the set of transmission antennas other than the first set of transmission antennas of the first device It is called the second transmit antenna set.

In addition, the CSI-RS received by the first device corresponds to the first set of resources, and the CSI-RS mentioned here corresponds to the first set of resources. Specifically, the CSI-RS is sent on the first set of resources of.

S404: Receive first CSI, where the first CSI is obtained by the first device measuring the CSI-RS.

In this embodiment, the first CSI indicates a state of a channel corresponding to the first transmission antenna set. The first CSI may be channel quality information (Channel Quality Indicator, CQI); precoding matrix identification (Pre-CodingMatrix Indicator, PMI); rank identification (Rank Indicator, RI); layer identification (LI); One or any combination of (L1-SINR) and Layer 1 Reference Signal Received Power (L1-RSRP).

In the CSI acquisition method provided by the embodiment of the present invention, the first device can determine the second resource set according to the received configuration information, and receive the CSI-RS on the first transmission antenna set corresponding to the second resource set and perform CSI reporting, Since the first device only receives CSI-RS on the first transmission antenna set corresponding to the second resource set for CSI reporting, instead of receiving CSI-RS on all transmission antenna sets for CSI reporting, the CSI reporting overhead is reduced .

Optionally, as an embodiment, the method 400 may also include the following steps:

receiving the SRS, and obtaining the second CSI according to the SRS, wherein,

The SRS is sent by the first device on a second transmission antenna set, and the second transmission antenna set is a transmission antenna set other than the first transmission antenna set; the SRS corresponds to a third resource set , the third resource set includes an SRS resource set or an SRS antenna port set.

As mentioned above, the first CSI indicates the state of the channel corresponding to the first transmission antenna set. The first device sends the SRS on the second transmission antenna set, and the second device can obtain the second CSI, which indicates the state of the channel corresponding to the second transmission antenna set. In this way, the second device obtains the first CSI and the second CSI by obtaining The second CSI means that all downlink CSI can be obtained without antenna switching and transmission, avoiding the time delay caused by antenna switching and transmission, and reducing the acquisition time of all downlink CSI.

Optionally, as an embodiment, the method 400 may also include the following steps:

The third CSI is obtained based on the first CSI and the second CSI, for details, refer to the embodiment shown in FIG. 3 . The first CSI in this embodiment includes at least one of the following: a first eigenvalue; a first eigenvector or a first PMI; a first RI; a first CQI; and a first LI. The second CSI includes at least one of: a second eigenvalue; a second eigenvector or a second PMI; a second RI; and a second LI.

The third CSI calculated by the second device based on the first CSI and the second CSI includes at least one of the following:

1) A second channel quality indicator CQI, wherein the second CQI is obtained based on the first CQI and the second CSI, and the first CSI includes the first CQI;

2) The third precoding matrix identifies the PMI, wherein the third PMI is obtained based on the first PMI and the second PMI, the first CSI includes the first PMI, and the second CSI includes the second PMI;

3) A third rank identifier RI, wherein the third RI is obtained based on the first RI and the second RI, the first CSI includes the first LI, and the second CSI includes the second LI;

4) The third layer identifies the CQI, wherein the third CQI is obtained based on the first CQI and the second CQI, the first CSI includes the first CQI, and the second CQI is based on the first CQI and the obtained The second CSI is obtained; and

5) A third LI, wherein the third LI is obtained based on the first CQI, the second CQI, the first LI, and the second LI, and the first CSI includes the first CQI and the first LI; The second CSI includes the second LI, and the second CQI is obtained based on the first CQI and the second CSI.

In this embodiment, the second device can send the PDSCH based on the third CSI.

Optionally, as an embodiment, the CSI-RS is sent by the second device in a first time-domain resource unit; and receiving the SRS includes: receiving the SRS in a second time-domain resource unit, wherein,

The interval between the first time-domain resource unit and the second time-domain resource unit is smaller than a preset value, for example, the first time-domain resource unit and the second time-domain resource are adjacent; for example, the first time-domain resource unit The interval between the resource unit and the second time-domain resource unit is less than M symbols, where M is a non-negative integer, for example, M=14 (corresponding to the normal cyclic prefix) or 12 (corresponding to the extended cyclic prefix); another example, the first time-domain resource The interval between the unit and the second time-domain resource unit is less than N time slots, where N is a non-negative integer, such as N=2. The acquisition time of all downlink CSI is further reduced, and the acquisition rate of downlink CSI is improved.

As mentioned above, the second resource set includes SRS resource set, SRS antenna port set or antenna panel set; the third resource set includes SRS resource set or SRS antenna port set, in one embodiment, the second resource set and the third The intersection of resource collections is empty. In this way, the first device can not only send the SRS on the second set of transmission antennas, but also send the SRS on the first set of transmission antennas that receive the CSI-RS.

Optionally, as an embodiment, the set of sending antennas of the first device is smaller than the set of receiving antennas, for example, the number of sending antennas is smaller than the number of receiving antennas.

Optionally, as an embodiment, the first CSI is reported through high-level signaling instructions, and the first CSI does not include CQI or modulation and coding strategy (Modulation and Coding Scheme, MCS) information or signal interference and noise Than information SINR.

Optionally, as an embodiment, the first resource set is used for beam management. For example, the second device may acquire the first CSI based on the first resource set, and perform beamforming based on the first CSI, so as to improve communication quality.

The above describes in detail the CSI reporting method and the obtaining method according to the embodiments of the present invention with reference to FIG. 1 to FIG. 4 , and the first device according to the embodiment of the present invention will be described in detail below with reference to FIG. 5 .

Fig. 5 is a schematic structural diagram of a first device 500 according to an embodiment of the present invention. As shown in Figure 5, the first device 500 includes:

The configuration information receiving module 502 may be configured to receive configuration information, where the configuration information is used to indicate a second resource set associated with the first resource set;

The CSI-RS receiving module 504 may be configured to receive a channel state information reference signal CSI-RS on the first transmission antenna set corresponding to the second resource set according to the configuration information, where the CSI-RS is related to the Corresponding to the first set of resources;

The measurement reporting module 506 may be configured to measure the CSI-RS, and report the first CSI according to the measurement result.

The first device provided by the embodiment of the present invention can determine the second resource set according to the received configuration information, and receive CSI-RS on the first transmission antenna set corresponding to the second resource set and perform CSI reporting. A device only receives CSI-RS on the first transmission antenna set corresponding to the second resource set for CSI reporting instead of receiving CSI-RS on all transmission antenna sets for CSI reporting, which reduces CSI reporting overhead.

Optionally, as an embodiment, the first resource set includes a CSI-RS resource set, a CSI-RS antenna port set, or a CSI reporting resource set.

Optionally, as an embodiment, the second resource set includes a Sounding Reference Signal (SRS) resource set, a SRS antenna port set, or an antenna panel set.

Optionally, as an embodiment, the first device 500 further includes a sending module (not shown), which can be used to send the SRS on the second transmission antenna set, so that the second device obtains the second CSI, wherein,

The second transmission antenna set is a transmission antenna set other than the first transmission antenna set; the SRS corresponds to a third resource set, and the third resource set includes an SRS resource set or an SRS antenna port set.

Optionally, as an embodiment, the CSI-RS receiving module 504 receiving the CSI-RS includes: the CSI-RS receiving module 504 receiving the CSI-RS in the first time domain resource unit; and the sending module sending the SRS includes : the sending module sends the SRS in the second time domain resource unit, wherein,

The interval between the first time domain resource unit and the second time domain resource unit is smaller than a preset value.

Optionally, as an embodiment, the intersection of the third resource set and the second resource set is empty.

Optionally, as an embodiment, the set of sending antennas of the first device is smaller than the set of receiving antennas.

The first device 500 according to the embodiment of the present invention can refer to the flow of the method 100 corresponding to the embodiment of the present invention, and each unit/module in the first device 500 and the above-mentioned other operations and/or functions are respectively in order to realize the method 100 For the sake of brevity, the corresponding process will not be repeated here.

Fig. 6 is a schematic structural diagram of a second device according to an embodiment of the present invention. As shown in FIG. 6, the second device 600 includes:

The sending module 602 may be configured to send configuration information, where the configuration information is used to indicate a second resource set associated with the first resource set, so that the first device, according to the configuration information, performs receiving a CSI-RS on a first set of transmission antennas, where the CSI-RS corresponds to the first set of resources;

The receiving module 604 may be configured to receive first CSI, where the first CSI is obtained by the first device measuring the CSI-RS.

The embodiment of the present invention provides a second device. The first device can determine the second resource set according to the received configuration information, and receive CSI-RS on the first transmission antenna set corresponding to the second resource set and perform CSI reporting. Because The first device only receives CSI-RS on the first transmission antenna set corresponding to the second resource set for CSI reporting, instead of receiving CSI-RS on all transmission antenna sets for CSI reporting, which reduces the CSI reporting overhead.

Optionally, as an embodiment, the first resource set includes a CSI-RS resource set, a CSI-RS antenna port set, or a CSI reporting resource set.

Optionally, as an embodiment, the second resource set includes a Sounding Reference Signal (SRS) resource set, a SRS antenna port set, or an antenna panel set.

Optionally, as an embodiment, the second device 600 further includes an SRS receiving module (not shown), which can be used to receive the SRS, and obtain the second CSI according to the SRS, wherein,

The SRS is sent by the first device on a second transmission antenna set, and the second transmission antenna set is a transmission antenna set other than the first transmission antenna set; the SRS corresponds to a third resource set , the third resource set includes an SRS resource set or an SRS antenna port set.

Optionally, as an embodiment, the second device 600 further includes an obtaining module (not shown), configured to obtain a third CSI based on the first CSI and the second CSI.

Optionally, as an embodiment, the CSI-RS is sent by the second device in the first time domain resource unit; and the receiving module 604 receiving the SRS includes: the receiving module 604 sends the SRS in the second time domain resource unit receives SRS, where,

The interval between the first time domain resource unit and the second time domain resource unit is smaller than a preset value.

Optionally, as an embodiment, the intersection of the third resource set and the second resource set is empty.

Optionally, as an embodiment, the set of sending antennas of the first device is smaller than the set of receiving antennas.

Optionally, as an embodiment, the first CSI is reported through a high-layer signaling instruction, and the first CSI does not include channel quality information CQI, modulation and coding strategy MCS information, or signal-to-interference-noise-ratio information SINR.

Optionally, as an embodiment, the first resource set is used for beam management.

The second device 600 according to the embodiment of the present invention can refer to the flow of the method 400 corresponding to the embodiment of the present invention, and each unit/module in the second device 600 and the above-mentioned other operations and/or functions are for realizing the method 400 For the sake of brevity, the corresponding process will not be repeated here.

Fig. 7 is a block diagram of a terminal device according to another embodiment of the present invention. The terminal device 700 shown in FIG. 7 includes: at least one processor 701 , a memory 702 , at least one network interface 704 and a user interface 703 . Various components in the terminal device 700 are coupled together through a bus system 705 . It can be understood that the bus system 705 is used to realize connection and communication between these components. In addition to the data bus, the bus system 705 also includes a power bus, a control bus and a status signal bus. However, for clarity of illustration, the various buses are labeled as bus system 705 in FIG. 7 .

Wherein, the user interface 703 may include a display, a keyboard or a pointing device (for example, a mouse, a trackball (trackball), a touch panel or a touch screen, and the like.

It can be understood that the memory 702 in the embodiment of the present invention may be a volatile memory or a nonvolatile memory, or may include both volatile and nonvolatile memories. Wherein, the non-volatile memory may be a read-only memory (Read-Only Memory, ROM), a programmable read-only memory (Programmable ROM, PROM), an erasable programmable read-only memory (Erasable PROM, EPROM), an electronically programmable Erase Programmable Read-Only Memory (Electrically EPROM, EEPROM) or Flash. The volatile memory can be Random Access Memory (RAM), which acts as an external cache. By way of illustration and not limitation, many forms of RAM are available such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (Synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (Double Data RateSDRAM, DDRSDRAM), enhanced synchronous dynamic random access memory (Enhanced SDRAM, ESDRAM), synchronous connection dynamic random access memory (Synchlink DRAM, SLDRAM) and Direct memory bus random access memory (DirectRambus RAM, DRRAM). The memory 702 of the systems and methods described in embodiments of the present invention is intended to include, but is not limited to, these and any other suitable types of memory.

In some implementations, the memory 702 stores the following elements, executable modules or data structures, or their subsets, or their extended sets: an operating system 7021 and an application program 7022 .

Among them, the operating system 7021 includes various system programs, such as framework layer, core library layer, driver layer, etc., for realizing various basic services and processing hardware-based tasks. The application program 7022 includes various application programs, such as a media player (Media Player), a browser (Browser), etc., and is used to implement various application services. The program for realizing the method of the embodiment of the present invention may be included in the application program 7022 .

In the embodiment of the present invention, the terminal device 700 further includes: a computer program stored in the memory 702 and operable on the processor 701 , when the computer program is executed by the processor 701 , the steps of the foregoing method 100 and method 400 are implemented.

The method 100 and the method 400 disclosed in the foregoing embodiments of the present invention may be applied to the processor 701 or implemented by the processor 701 . The processor 701 may be an integrated circuit chip with signal processing capability. In the implementation process, each step of the above method may be completed by an integrated logic circuit of hardware in the processor 701 or instructions in the form of software. The above-mentioned processor 701 may be a general-purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), an off-the-shelf programmable gate array (Field Programmable Gate Array, FPGA) or other Programmable logic devices, discrete gate or transistor logic devices, discrete hardware components. Various methods, steps and logic block diagrams disclosed in the embodiments of the present invention may be implemented or executed. A general-purpose processor may be a microprocessor, or the processor may be any conventional processor, or the like. The steps of the methods disclosed in the embodiments of the present invention may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in a computer-readable storage medium mature in the field such as random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, registers, and the like. The computer-readable storage medium is located in the memory 702, and the processor 701 reads the information in the memory 702, and completes the steps of the above method in combination with its hardware. Specifically, a computer program is stored on the computer-readable storage medium, and when the computer program is executed by the processor 701, the steps of the above-mentioned method 100 and method 400 are implemented.

It can be understood that the embodiments described in the embodiments of the present invention may be implemented by hardware, software, firmware, middleware, microcode or a combination thereof. For hardware implementation, the processing unit can be implemented in one or more application specific integrated circuits (Application Specific Integrated Circuits, ASIC), digital signal processor (Digital Signal Processing, DSP), digital signal processing device (DSP Device, DSPD), programmable logic Device (Programmable Logic Device, PLD), Field-Programmable Gate Array (Field-Programmable Gate Array, FPGA), general-purpose processor, controller, microcontroller, microprocessor, other electronic units for performing the functions described in this application or a combination thereof.

For software implementation, the techniques described in the embodiments of the present invention may be implemented through modules (such as procedures, functions, etc.) that execute the functions described in the embodiments of the present invention. Software codes can be stored in memory and executed by a processor. Memory can be implemented within the processor or external to the processor.

The terminal device 700 can implement various processes implemented by the first device 500 and the second device 600 in the foregoing embodiments, and details are not repeated here to avoid repetition.

Please refer to FIG. 8 . FIG. 8 is a structural diagram of a network device applied in the embodiment of the present invention, which can realize the details of the method embodiment 400 and achieve the same effect. As shown in FIG. 8, the network device 800 includes: a processor 801, a transceiver 802, a memory 803, and a bus interface, wherein:

In the embodiment of the present invention, the network device 800 further includes: a computer program stored in the memory 803 and operable on the processor 801 , and the computer program implements the steps of the method 400 when executed by the processor 801 .

In FIG. 8 , the bus architecture may include any number of interconnected buses and bridges, specifically one or more processors represented by processor 801 and various circuits of memory represented by memory 803 are linked together. The bus architecture can also link together various other circuits such as peripherals, voltage regulators, and power management circuits, etc., which are well known in the art and therefore will not be further described herein. The bus interface provides the interface. Transceiver 802 may be a plurality of elements, including a transmitter and a receiver, providing a means for communicating with various other devices over transmission media.

The processor 801 is responsible for managing the bus architecture and general processing, and the memory 803 can store data used by the processor 801 when performing operations.

An embodiment of the present invention also provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, each process of the above-mentioned method embodiment 100 and method embodiment 400 is implemented, and can To achieve the same technical effect, in order to avoid repetition, no more details are given here. Wherein, the computer-readable storage medium is, for example, a read-only memory (Read-Only Memory, ROM for short), a random access memory (Random Access Memory, RAM for short), a magnetic disk or an optical disk, and the like.

It should be noted that, in this document, the term "comprising", "comprising" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article or apparatus comprising a set of elements includes not only those elements, It also includes other elements not expressly listed, or elements inherent in the process, method, article, or device. Without further limitations, an element defined by the phrase "comprising a ..." does not preclude the presence of additional identical elements in the process, method, article, or apparatus comprising that element.

Through the description of the above embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus a necessary general-purpose hardware platform, and of course also by hardware, but in many cases the former is better implementation. Based on such an understanding, the essence of the technical solution of the present invention or the part that contributes to the prior art can be embodied in the form of software products, and the computer software products are stored in a storage medium (such as ROM/RAM, disk, CD) contains several instructions to make a terminal (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) execute the methods described in various embodiments of the present invention.

Embodiments of the present invention have been described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementations, and the above-mentioned specific implementations are only illustrative, rather than restrictive, and those of ordinary skill in the art will Under the enlightenment of the present invention, without departing from the gist of the present invention and the protection scope of the claims, many forms can also be made, all of which belong to the protection of the present invention.

Claims (15)

1. A method for reporting channel state information CSI, the method being performed by a first device, the method comprising:

receiving configuration information, wherein the configuration information is used for indicating a second resource set associated with the first resource set;

receiving a channel state information reference signal (CSI-RS) on a first transmission antenna set corresponding to the second resource set according to the configuration information, wherein the CSI-RS corresponds to the first resource set; the first resource set comprises a CSI-RS resource set, a CSI-RS antenna port set or a CSI reporting resource set; the second resource set comprises a sounding reference signal SRS resource set, an SRS antenna port set or an antenna panel set;

measuring the CSI-RS, and reporting a first CSI according to a measurement result;

the method further comprises the steps of: transmitting an SRS on a second transmission antenna set of the first device so that the second device obtains second CSI; the receiving CSI-RS includes: receiving a CSI-RS at a first time domain resource element; and, the transmitting SRS includes: and sending SRS in a second time domain resource unit, wherein the interval between the first time domain resource unit and the second time domain resource unit is smaller than a preset value, the preset value is 1, or the preset value is 12 symbols or 14 symbols, or the preset value is 2 time slots.

2. The method of claim 1, wherein,

the second set of transmission antennas is a set of transmission antennas other than the first set of transmission antennas; the SRS corresponds to a third set of resources including a set of SRS resources or a set of SRS antenna ports.

3. The method of claim 2, wherein,

the intersection of the third set of resources and the second set of resources is empty.

4. The method of claim 1, wherein,

the set of transmit antennas of the first device is smaller than the set of receive antennas.

5. A CSI acquisition method, the method performed by a second device, the method comprising:

transmitting configuration information, wherein the configuration information is used for indicating a second resource set associated with a first resource set, so that a first device receives a CSI-RS on a first transmission antenna set corresponding to the second resource set according to the configuration information, and the CSI-RS corresponds to the first resource set; the first resource set comprises a CSI-RS resource set, a CSI-RS antenna port set or a CSI reporting resource set; the second resource set comprises a sounding reference signal SRS resource set, an SRS antenna port set or an antenna panel set;

Receiving first CSI, wherein the first CSI is obtained by measuring the CSI-RS by the first equipment;

the method further comprises the steps of: receiving SRS, and obtaining second CSI according to the SRS; the CSI-RS is sent by the second equipment in a first time domain resource unit; and, the receiving SRS includes: and receiving SRS in a second time domain resource unit, wherein the interval between the first time domain resource unit and the second time domain resource unit is smaller than a preset value, the preset value is 1, or the preset value is 12 symbols or 14 symbols, or the preset value is 2 time slots.

6. The method of claim 5, wherein,

the SRS is transmitted by the first device on a second set of transmission antennas, the second set of transmission antennas being a set of transmission antennas other than the first set of transmission antennas; the SRS corresponds to a third set of resources including a set of SRS resources or a set of SRS antenna ports.

7. The method of claim 6, wherein the method further comprises:

and obtaining a third CSI based on the first CSI and the second CSI.

8. The method of claim 6, wherein,

The intersection of the third set of resources and the second set of resources is empty.

9. The method of claim 5, wherein,

the set of transmit antennas of the first device is smaller than the set of receive antennas.

10. The method of claim 5, wherein,

the first CSI is reported through a high-layer signaling indication, and the first CSI does not comprise channel quality information CQI or modulation and coding strategy MCS information or signal to interference plus noise ratio information SINR.

11. The method of claim 5, wherein,

the purpose of the first set of resources is beam management.

12. A first device for a CSI reporting method, comprising:

a configuration information receiving module for receiving configuration information, the configuration information being used for indicating a second resource set associated with the first resource set;

a CSI-RS receiving module, configured to receive CSI-RS on a first set of transmission antennas corresponding to the second set of resources according to the configuration information, where the CSI-RS corresponds to the first set of resources; the first resource set comprises a CSI-RS resource set, a CSI-RS antenna port set or a CSI reporting resource set; the second resource set comprises a sounding reference signal SRS resource set, an SRS antenna port set or an antenna panel set;

The measurement reporting module is used for measuring the CSI-RS and reporting a first CSI according to a measurement result;

the first device further includes a transmitting module configured to transmit an SRS on a second set of transmission antennas of the first device, so that a second device obtains a second CSI; the CSI-RS receiving module receives the CSI-RS in a first time domain resource unit, the sending module sends the SRS in a second time domain resource unit, the interval between the first time domain resource unit and the second time domain resource unit is smaller than a preset value, the preset value is 1, or the preset value is 12 symbols or 14 symbols, or the preset value is 2 time slots.

13. A second apparatus for a CSI acquisition method, comprising:

a sending module, configured to send configuration information, where the configuration information is used to indicate a second resource set associated with a first resource set, so that a first device receives CSI-RS on a first transmission antenna set corresponding to the second resource set according to the configuration information, where the CSI-RS corresponds to the first resource set; the first resource set comprises a CSI-RS resource set, a CSI-RS antenna port set or a CSI reporting resource set; the second resource set comprises a sounding reference signal SRS resource set, an SRS antenna port set or an antenna panel set;

The receiving module is used for receiving first CSI, wherein the first CSI is obtained by measuring the CSI-RS by the first equipment;

the second device further comprises an SRS receiving module, which is used for receiving an SRS and obtaining a second CSI according to the SRS; the CSI-RS is sent by the second device in a first time domain resource unit, and the SRS receiving module receives an SRS in a second time domain resource unit, where an interval between the first time domain resource unit and the second time domain resource unit is smaller than a preset value, and the preset value is 1, or the preset value is 12 symbols or 14 symbols, or the preset value is 2 slots.

14. A communication device, comprising: memory, a processor and a computer program stored on the memory and executable on the processor, which when executed by the processor, performs the steps of the method according to any one of claims 1 to 11.

15. A computer-readable storage medium, on which a computer program is stored, which computer program, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 11.