CN111107633A - CSI reporting method, CSI acquisition method and equipment - Google Patents

CSI reporting method, CSI acquisition method and equipment Download PDF

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Publication number
CN111107633A
CN111107633A CN201811261650.6A CN201811261650A CN111107633A CN 111107633 A CN111107633 A CN 111107633A CN 201811261650 A CN201811261650 A CN 201811261650A CN 111107633 A CN111107633 A CN 111107633A
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csi
srs
resources
configuration information
resource
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CN201811261650.6A
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CN111107633B (en
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孙晓东
孙鹏
周帅
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Vivo Mobile Communication Co Ltd
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Vivo Mobile Communication Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/309—Measuring or estimating channel quality parameters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/382—Monitoring; Testing of propagation channels for resource allocation, admission control or handover
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0621—Feedback content
    • H04B7/0626—Channel coefficients, e.g. channel state information [CSI]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Quality & Reliability (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The embodiment of the invention discloses a method and equipment for reporting Channel State Information (CSI), which are used for reducing 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 a first resource set; receiving a channel state information reference signal (CSI-RS) on a first set of transmission antennas corresponding to the second set of resources according to the configuration information, wherein the CSI-RS corresponds to the first set of resources; and measuring the CSI-RS, and reporting the first CSI according to the measurement result. The embodiment of the invention also discloses a CSI acquisition method and equipment.

Description

CSI reporting method, CSI acquisition method and equipment
Technical Field
The present application relates to the field of communications, and in particular, to a method for reporting Channel State Information (CSI), a method for acquiring CSI, and a device.
Background
Multiple-antenna Multiple-Input Multiple-Output (MIMO) technology has become one of the key technologies of current mobile communication systems. The multiple antenna technology has many advantages such as increasing system capacity using space division multiplexing of multiple antennas, expanding system throughput using multiplexing gain of multiple antennas, and the like.
The existing method for acquiring downlink CSI comprises: the network device sends a Channel State Information-Reference Signal (CSI-RS) or a synchronization Signal block (PBCH/SSBlock) to the terminal device, the terminal device measures and feeds back CSI, and the network device receives the CSI-RS or the PBCH/SSBlock. In particular, in a Time Division Duplex (TDD) system, since uplink and downlink channels have reciprocity, a terminal device may send a Sounding Reference Signal (SRS) to a network device, and the network device performs measurement to obtain CSI.
In the related art, if the network device obtains all downlink CSI by sending the CSI-RS, the terminal device needs to receive the CSI-RS on all the receiving antennas for CSI reporting, and the CSI reporting overhead is large.
Disclosure of Invention
The embodiment of the application aims to provide a CSI reporting method, a CSI acquisition method and a device, which are used for solving the problem of high CSI reporting overhead of a terminal device.
In a first aspect, a CSI reporting method is provided, where the method is performed by a first device, and the method includes:
receiving configuration information, wherein the configuration information is used for indicating a second resource set associated with a first resource set;
receiving a 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 the measurement result.
In a second aspect, a CSI acquisition method is provided, where the method is performed by a second device, and the method includes:
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 CSI-RS (channel state information-reference signal) 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;
receiving first CSI, wherein the first CSI is obtained by the first equipment through measurement on the CSI-RS.
In a third aspect, a first device is provided, the first device comprising:
a configuration information receiving module, configured to receive configuration information, where the configuration information is used to indicate a second resource set associated with a first resource set;
a CSI-RS receiving module, configured to receive, according to the configuration information, a CSI-RS on a first set of transmission antennas corresponding to the second set of resources, where the CSI-RS corresponds to the first set of resources;
and the measurement reporting module is used for measuring the CSI-RS and reporting the first CSI according to the measurement result.
In a fourth aspect, there is provided a second device comprising:
a sending module, configured to send configuration information, where the configuration information is used to indicate a second set of resources associated with a first set of resources, so that a first device receives a 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;
a receiving module, configured to receive first CSI, where the first CSI is obtained by the first device through measurement on the CSI-RS.
In a fifth aspect, there is provided an apparatus comprising a processor, a memory, and a computer program stored on the memory and executable on the processor, the computer program, when executed by the processor, implementing the steps of the method according to the first and second aspects.
A sixth aspect provides a computer readable storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of the method according to the first and second aspects.
In the embodiment of the invention, the first device can determine the second resource set according to the received configuration information, and receives the CSI-RS on the first transmission antenna set corresponding to the second resource set and reports the CSI.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
fig. 1 is a schematic flow diagram of a CSI reporting method according to one 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 diagram illustrating a specific application of the CSI reporting method according to an embodiment of the present invention;
fig. 4 is a schematic flow diagram of a CSI acquisition method according to another embodiment of the present invention;
FIG. 5 is a schematic block diagram of a first device according to one embodiment of the present invention;
FIG. 6 is a schematic diagram of a second device according to one 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 Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail and completely with reference to the following specific embodiments of the present application and the accompanying drawings. It should be apparent that the described embodiments are only some of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be understood that the technical solutions of the embodiments of the present invention can be applied to various communication systems, for example: a Global System for Mobile communications (GSM) System, a Code Division Multiple Access (CDMA) System, a Wideband Code Division Multiple Access (WCDMA) System, a General Packet Radio Service (GPRS), a Long Term Evolution (Long Term Evolution, LTE) System, an LTE Frequency Division Duplex (FDD) System, an LTE Time Division Duplex (TDD), a Universal Mobile Telecommunications System (UMTS) or Worldwide Interoperability for Microwave Access (WiMAX) communication System, a 5G System, or a New Radio (NR) System, or a subsequent Evolution System.
In the embodiment of the present invention, the Terminal device may include, but is not limited to, a Mobile Station (MS), a Mobile Terminal (Mobile Terminal), a Mobile phone (Mobile Telephone), a User Equipment (UE), a handset (handset), a portable device (portable Equipment), a vehicle (vehicle), etc., and the Terminal device may communicate with one or more core networks through a Radio Access Network (RAN), for example, the Terminal device may be a Mobile phone (or referred to as a "cellular" phone), a computer with a wireless communication function, and the Terminal device may also be a portable, pocket, handheld, computer-embedded, or vehicle-mounted Mobile apparatus.
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 macro base stations, micro base stations, relay stations, access points, and the like. In systems employing different radio access technologies, the names of devices having a base station function may differ. For example, in an LTE network, called an Evolved node B (eNB or eNodeB), in a third Generation (3G) network, called a node B (node B), or a network device in a later Evolved communication system, etc., although the words are not limiting.
As shown in fig. 1, an embodiment of the present invention provides a method 100 for reporting Channel State Information (CSI), where the method may be executed by a first device, and the first device may specifically be the aforementioned terminal device, where the embodiment 100 includes the following steps:
s102: configuration information is received, the configuration information indicating a second set of resources associated with the first set of resources.
In this embodiment, the configuration information is typically from a second device, which may be the aforementioned network device; the method of the embodiment may also be a terminal Device as mentioned above, that is, the method of the embodiment may be applied in a scenario of V2V communication (Vehicle communication), Device to Device (D2D), and the like.
The first set of resources is typically a set of resources of a second device side (e.g., a network device side). Optionally, the first set of resources includes: the second device may send a Channel State Information-reference signal (CSI-RS) resource set, a CSI-RS antenna port set, or a CSI reporting resource set, and the second device may send the CSI-RS based on the first resource set to obtain the first CSI.
For the above-mentioned CSI-RS resource set, CSI-RS antenna port set, and CSI reporting resource set, the CSI-RS resource set may include one or more CSI-RS resources; the set of CSI-RS antenna ports may include one or more CSI-RS antenna ports; the set of CSI reporting resources may include one or more CSI reporting resources.
Optionally, the purpose of the first resource set is beam management, for example, the second device may obtain the first CSI based on the first resource set (see subsequent steps in this embodiment), and perform beam forming based on the first CSI, so as to improve communication quality.
The second set of resources is typically a set of resources of the first device side (e.g. the terminal device side). Optionally, the second resource set includes a Sounding Reference Signal (SRS) resource set, an SRS antenna port set, or an antenna panel set, and the first device may send an SRS based on the second resource set, so that the second device obtains the second CSI.
For the above-mentioned SRS resource set, SRS antenna port set, and antenna panel set, the SRS resource set may include one or more SRS resources; the set of SRS antenna ports may include one or more SRS antenna ports; the set of antenna panels may include one or more antenna panels (identities).
The configuration information is used to indicate a second resource set associated with the first resource set, for example, to specifically indicate an SRS resource set associated with the CSI-RS resource set; to indicate a set of SRS antenna ports associated with a set of CSI-RS resources; to indicate a set of antenna panels (first device side) associated with the set of CSI-RS resources, and so on. In this way, the first device may obtain the second set of resources associated with the first set of resources based on the configuration information.
S104: and receiving 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.
In this embodiment, if the second device configures the first device to perform CSI reporting, the first device may receive the CSI-RS, specifically, receive the CSI-RS on the first transmission antenna set corresponding to the second resource set, where the second resource set and the first transmission antenna set have a corresponding relationship.
The first transmission antenna set mentioned in this embodiment may specifically be an antenna set, an antenna port set, or an antenna Panel (Panel) set of the first device.
In this embodiment, the first device may further include other transmission antenna sets in addition to the first transmission antenna set, and in the following embodiments, the transmission antenna sets other than the first transmission antenna set of the first device are referred to as second transmission antenna sets.
That is, the first set of transmit antennas of the first device comprises a first set of antennas, a first set of antenna ports, or a first set of antenna panels; accordingly, the second set of transmit antennas of the first device comprises a second set of antennas, a second set of antenna ports, or a second set of antenna panels.
In addition, the received CSI-RS corresponds to a first resource set, and the CSI-RS mentioned here corresponds to the first resource set, which may specifically be: the CSI-RS is transmitted on the first set of resources.
S106: and measuring the CSI-RS, and reporting the first CSI according to the measurement result.
In this embodiment, the first CSI represents a state of a channel corresponding to the first set of transmission antennas. The first CSI may be Channel Quality Information (CQI); a Precoding Matrix Indicator (PMI); rank Indicator (RI); a Layer Identification (LI); layer 1 signal to interference and noise ratio (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. The periodic first CSI reporting is typically performed through a Physical Uplink Control Channel (PUCCH). If the first device is scheduled with data to be sent on the subframe where the first CSI is periodically reported, the periodic first CSI reporting is performed through a Physical Uplink Shared Channel (PUSCH). And the aperiodic first CSI reporting is carried out through a PUSCH.
According to the CSI reporting method provided by the embodiment of the invention, the first equipment can determine the second resource set according to the received configuration information, and receives the CSI-RS on the first transmission antenna set corresponding to the second resource set and carries out CSI reporting, and because the first equipment only receives the CSI-RS on the first transmission antenna set corresponding to the second resource set for CSI reporting, instead of receiving the CSI-RS on all the transmission antenna sets for CSI reporting, CSI reporting overhead is reduced.
If the transmit antenna set and the receive antenna set of the first device are not equal, for example, the transmit antenna set is smaller than the receive antenna set, in the prior art, the first device (specifically, the terminal device) needs to switch antennas to transmit the SRS, and the second device (specifically, the network device) can acquire all CSI.
In order to reduce the time for acquiring all downlink CSI, the embodiment shown in fig. 1 may further include the following steps:
transmitting SRS on a second set of transmission antennas of the first device to cause a second device to obtain second CSI, wherein,
the second CSI represents a state of a channel corresponding to a second set of transmit antennas 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 set of resources, where the third set of resources includes a set of SRS resources or a set of SRS antenna ports, that is, the SRS may be transmitted according to the third set of resources.
The embodiment can be applied to a scenario that the uplink and downlink channels have reciprocity, for example, in a TDD system.
As described above, the first CSI represents a state of a channel corresponding to the first set of transmit antennas. The first equipment sends the SRS on the second transmission antenna set so that the second equipment obtains the second CSI, and the second CSI represents the state of a channel corresponding to the second transmission antenna set, so that the second equipment obtains the first CSI and the second CSI by obtaining, that is, all downlink CSI can be obtained without antenna switching sending, time delay caused by antenna switching sending is avoided, and the obtaining time of all downlink CSI is reduced.
In addition, in the embodiment of the present invention, one part of all downlink CSI is realized by sending downlink CSI-RS through the second device, and the other part is realized by sending SRS through the first device, so that overhead of the first device for feeding back CSI can be reduced compared with a manner in which the second device sends downlink CSI-RS to obtain all downlink CSI; meanwhile, the problem that the network equipment cannot send the CSI-RS under certain conditions, namely cannot acquire all downlink CSI is solved.
The receiving of the CSI-RS on the first set of transmission antennas corresponding to the second set of resources mentioned in step S104 in the foregoing embodiments may specifically be: receiving a CSI-RS at a first time domain resource element; the above-mentioned sending of the SRS on the second set of transmission antennas of the first device may specifically be: and transmitting the second SRS in the second time domain resource unit. The first time domain resource unit and the second time domain resource unit may specifically be other time domain resource units such as a symbol or a time slot.
Optionally, an 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, that is, the preset value may be 1; for another example, the first time domain resource unit and the second time domain resource unit are separated by less than M symbols, where M is a non-negative integer, e.g., M ═ 14 (corresponding to a normal cyclic prefix) or 12 (corresponding to an extended cyclic prefix); for another example, the first time domain resource unit and the second time domain resource unit are separated by less than N time slots, where N is a non-negative integer, e.g., N-2.
In this embodiment, the front-to-back (time) sequence of the first time domain resource unit and the second time domain resource unit is not limited, and specifically, the first time domain resource unit may be before and the second time domain resource unit may be after, or the second time domain resource unit may be before and the first time domain resource unit may be after.
By 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, the second device can acquire the first CSI and the second CSI in as short a time as possible, that is, acquire all downlink CSI, further reduce the acquisition time of all downlink CSI, and improve the acquisition rate of the downlink CSI.
As previously described, the second set of resources includes a set of sounding reference signal, SRS, antenna ports, or antenna panels; the third set of resources comprises a set of SRS resources or a set of SRS antenna ports, and in one embodiment, an intersection of the second set of resources and the third set of resources is empty. In this way, the first device may not only transmit SRS on the second set of transmission antennas, but may also transmit SRS on the first set of transmission antennas that receive 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 shown in fig. 2 as a UE, and the second device may be a network device, and includes a plurality of transmission/reception points TRP, where each TRP corresponds to a different downlink. Specifically, as shown in fig. 2, TRP1 and TRP2, TRP1 and TRP2 correspond to different downlinks, respectively.
Panel 0 in this embodiment corresponds to the first set of transmit antennas in the previous embodiment, and Panel 1 corresponds to the second set of transmit antennas in the previous embodiment.
In this embodiment, the first set of resources is associated with SRS transmitted on antenna Panel 0, and the second set of resources corresponds to Panel 0. Therefore, if the network equipment configures the UE to report the CSI, the UE can receive the CSI-RS on the Panel 0, measure the CSI-RS received on the Panel 0 and report the first CSI according to the measurement result.
In addition, the UE may also transmit an SRS on the Panel 1, so that the network device calculates the second CSI based on the SRS transmitted by the UE Panel 1.
In this embodiment, the Panel 0 of the UE receives the CSI-RS in the first time domain resource unit, the Panel 1 of the UE sends the SRS in the second time domain resource unit, and an interval between the first time domain resource unit and the second time domain resource unit is smaller than a preset value, so that the time for acquiring all downlink CSI is further reduced, and the rate for acquiring downlink CSI is increased.
In addition, the first CSI in this embodiment includes at least one of: a first characteristic value; 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 comprises at least one of the following: a second characteristic value; 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 acquire the downlink interference condition, so that the network device may further derive and calculate the second CSI based on the first CSI (specifically, the first CQI in the first CSI) and the second CSI, that is, acquire the CQI of the channel corresponding to the Pane 1.
In this embodiment, the network device may send a 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. The antenna sets 0, 2 in this embodiment correspond to the first transmit antenna set in the previous embodiment, and the antenna sets 1, 3 correspond to the second transmit antenna set in the previous embodiment.
In this embodiment, downlink multi-antenna transmission is performed, each antenna set corresponds to a different downlink transmission layer, the first resource set is associated with the SRS transmitted on the antenna set 0, 2, and the second resource set corresponds to the antenna set 0, 2. Thus, if the network device configures the UE to report the CSI, the UE may receive the CSI-RS on the antenna sets 0 and 2, measure the CSI-RS received on the antenna sets 0 and 2, and report the first CSI according to the measurement result.
In addition, the UE may also transmit SRS on the antenna sets 1, 3, so that the network device calculates the second CSI based on the SRS transmitted by the UE antenna sets 1, 3.
In this embodiment, the antenna sets 0 and 2 of the UE receive the CSI-RS in the first time domain resource unit, the antenna sets 1 and 3 of the UE transmit the SRS in the second time domain resource unit, and an interval between the first time domain resource unit and the second time domain resource unit is smaller than a preset value, so that the time for acquiring all downlink CSI is further reduced, and the rate for acquiring downlink CSI is increased.
In addition, the first CSI in this embodiment includes at least one of: a first characteristic value; 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 comprises at least one of the following: a second characteristic value; a second eigenvector or a second PMI; a second RI; and a second LI.
The network device may further calculate, based on the first CSI and the second CSI, third CSI, where the third CSI includes at least one of:
1) a second CQI, wherein the second CQI is obtained based on a first CQI and the second CSI, and the first CSI comprises the first CQI;
2) a third Precoding Matrix Identifier (PMI), wherein the third PMI is obtained based on a first PMI and a 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 a first RI and a second RI, the first CSI includes the first LI, and the second CSI includes the second LI;
4) a third layer identifier CQI, wherein the third CQI is obtained based on a first CQI and a second CQI, the first CSI comprises the first CQI, and the second CQI is obtained based on the first CQI and the second CSI; and
5) a third LI, wherein the third LI is obtained based on a first CQI, a second CQI, a first LI and a second LI, and the first CSI comprises the first CQI and the first LI; the second CSI includes the second LI, and the second CQI is derived based on the first CQI and the second CSI.
In this embodiment, the network device may send the PDSCH based on the third CSI, which is convenient to improve communication efficiency.
Fig. 4 is a schematic diagram of an implementation flow of the CSI acquisition method according to the embodiment of the present invention, which may be applied to a second device side, where as described above, the second device may specifically be the aforementioned network device or the aforementioned terminal device, that is, the method provided in the embodiment may be applied to scenarios such as V2V communication, terminal direct connection, and the like. As shown in fig. 4, the method 400 includes:
s402: and sending configuration information, wherein the configuration information is used for indicating a second resource set associated with the first resource set, so that the first device receives 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.
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 first set of resources includes: the second device may send a Channel state information-Reference Signal (CSI-RS) resource set, a CSI-RS antenna port set, or a CSI reporting resource set, based on the first resource set, to obtain the first CSI.
For the above-mentioned CSI-RS resource set, CSI-RS antenna port set, and CSI reporting resource set, the CSI-RS resource set may include one or more CSI-RS resources; the set of CSI-RS antenna ports may include one or more CSI-RS antenna ports; the set of CSI reporting resources may include one or more CSI reporting resources.
Optionally, the purpose of the first resource set is beam management, for example, the second device may obtain the first CSI based on the first resource set (see subsequent steps in this embodiment), and perform beam forming based on the first CSI, so as to improve communication quality.
The second set of resources is typically a set of resources of the first device side (e.g. the terminal device side). Optionally, the second resource set includes a Sounding Reference Signal (SRS) resource set, an SRS antenna port set, or an antenna panel set, and the first device may send an SRS based on the second resource set, so that the second device obtains the second CSI.
For the above-mentioned SRS resource set, SRS antenna port set, and antenna panel set, the SRS resource set may include one or more SRS resources; the set of SRS antenna ports may include one or more SRS antenna ports; the set of antenna panels may include one or more antenna panels (identities).
In this embodiment, if the second device configures the first device to perform CSI reporting, the first device may receive the CSI-RS, specifically, receive the CSI-RS on the first transmission antenna set corresponding to the second resource set, where the second resource set and the first transmission antenna set have a corresponding relationship.
The first transmission antenna set mentioned in this embodiment may specifically be an antenna set, an antenna port set, or an antenna Panel (Panel) set of the first device.
In this embodiment, the first device may further include other transmission antenna sets besides the first transmission antenna set, and the transmission antenna sets other than the first transmission antenna set of the first device are referred to as second transmission antenna sets in this embodiment.
In addition, the CSI-RS received by the first device corresponds to the first resource set, where the CSI-RS mentioned here corresponds to the first resource set, which may specifically be: the CSI-RS is transmitted on the first set of resources.
S404: receiving first CSI, wherein the first CSI is obtained by the first equipment through measurement on the CSI-RS.
In this embodiment, the first CSI represents a state of a channel corresponding to the first set of transmission antennas. The first CSI may be Channel Quality Information (CQI); a Precoding Matrix Indicator (PMI); rank Indicator (RI); a Layer Identification (LI); layer 1 signal to interference and noise ratio (L1-SINR) and layer 1 reference signal received power (L1-RSRP).
According to the CSI acquisition method provided by the embodiment of the invention, the first equipment can determine the second resource set according to the received configuration information, and receives the CSI-RS on the first transmission antenna set corresponding to the second resource set and reports the CSI.
Optionally, as an embodiment, the method 400 may further include the following steps:
receiving an SRS and obtaining a second CSI according to the SRS, 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, which includes a set of SRS resources or a set of SRS antenna ports.
As described above, the first CSI represents a state of a channel corresponding to the first set of transmit antennas. The first equipment sends the SRS on the second transmission antenna set, the second equipment can obtain the second CSI, and the second CSI represents the state of a channel corresponding to the second transmission antenna set, so that the second equipment obtains the first CSI and the second CSI by obtaining, that is, all downlink CSI can be obtained without antenna switching sending, time delay caused by antenna switching sending is avoided, and the obtaining time of all downlink CSI is reduced.
Optionally, as an embodiment, the method 400 may further include the following steps:
obtaining a third CSI based on the first CSI and the second CSI, which may specifically refer to the embodiment shown in fig. 3. The first CSI in this embodiment comprises at least one of: a first characteristic value; 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 characteristic value; 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 comprises at least one of the following:
1) a second Channel Quality Indicator (CQI), wherein the second CQI is obtained based on a first CQI and the second CSI, and the first CSI comprises the first CQI;
2) a third Precoding Matrix Identifier (PMI), wherein the third PMI is obtained based on a first PMI and a 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 a first RI and a second RI, the first CSI includes the first LI, and the second CSI includes the second LI;
4) a third layer identifier CQI, wherein the third CQI is obtained based on a first CQI and a second CQI, the first CSI comprises the first CQI, and the second CQI is obtained based on the first CQI and the second CSI; and
5) a third LI, wherein the third LI is obtained based on a first CQI, a second CQI, a first LI and a second LI, and the first CSI comprises the first CQI and the first LI; the second CSI includes the second LI, and the second CQI is derived based on the first CQI and the second CSI.
In this embodiment, the second device may send the PDSCH based on the third CSI.
Optionally, as an embodiment, the CSI-RS is transmitted by the second device in a first time domain resource unit; and, the receiving the SRS comprises: 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 another example, the first time domain resource unit and the second time domain resource unit are separated by less than M symbols, where M is a non-negative integer, e.g., M ═ 14 (corresponding to a normal cyclic prefix) or 12 (corresponding to an extended cyclic prefix); for another example, the first time domain resource unit and the second time domain resource unit are separated by less than N time slots, where N is a non-negative integer, e.g., N-2. And the time for acquiring all downlink CSI is further reduced, and the rate for acquiring the downlink CSI is improved.
As previously described, the second set of resources includes a set of SRS resources, a set of SRS antenna ports, or a set of antenna panels; the third set of resources comprises a set of SRS resources or a set of SRS antenna ports, and in one embodiment, an intersection of the second set of resources and the third set of resources is empty. In this way, the first device may not only transmit SRS on the second set of transmission antennas, but may also transmit SRS on the first set of transmission antennas that receive CSI-RS.
Optionally, as an embodiment, the set of transmit antennas of the first device is smaller than the set of receive antennas, for example, the number of transmit antennas is smaller than the number of receive antennas.
Optionally, as an embodiment, the first CSI is reported through a high layer signaling indication, and the first CSI does not include CQI, Modulation and Coding Scheme (MCS) information, or signal to interference plus noise ratio (SINR) information.
Optionally, as an embodiment, the purpose of the first set of resources is beam management. For example, the second device may obtain the first CSI based on the first set of resources, perform beamforming based on the first CSI, and so on, so as to improve communication quality.
The CSI reporting method and the acquiring method according to the embodiment of the present invention are described in detail above with reference to fig. 1 to 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 apparatus 500 according to an embodiment of the present invention. As shown in fig. 5, the first device 500 includes:
a configuration information receiving module 502, which may be configured to receive configuration information indicating a second set of resources associated with a first set of resources;
a CSI-RS receiving module 504, configured to receive a channel state information reference signal, 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 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 invention 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.
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 set of resources includes a sounding reference signal SRS resource set, an SRS antenna port set, or an antenna panel set.
Optionally, as an embodiment, the first device 500 further includes a transmitting module (not shown) configured to transmit SRS on the second set of transmission antennas, so that the second device obtains the second CSI, where,
the second set of transmit antennas is a set of transmit antennas other than the first set of transmit antennas; the SRS corresponds to a third set of resources, which includes a set of SRS resources or a set of SRS antenna ports.
Optionally, as an embodiment, the receiving the CSI-RS by the CSI-RS receiving module 504 includes: the CSI-RS receiving module 504 receives CSI-RS at the first time domain resource element; and the sending module sending the SRS comprises: the transmitting module transmits the SRS in the second time domain resource unit, wherein,
and 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, an intersection of the third resource set and the second resource set is empty.
Optionally, as an embodiment, the set of transmit antennas of the first device is smaller than the set of receive antennas.
The first device 500 according to the embodiment of the present invention may refer to the flow corresponding to the method 100 according to the embodiment of the present invention, and each unit/module and the other operations and/or functions described above in the first device 500 are respectively for implementing the corresponding flow in the method 100, and are not described herein again for brevity.
Fig. 6 is a schematic configuration diagram of a second apparatus according to an embodiment of the present invention. As illustrated in fig. 6, the second apparatus 600 includes:
a sending module 602, configured to send configuration information, where the configuration information is used to indicate a second set of resources associated with a first set of resources, so that a first device receives 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 receiving module 604 may be configured to receive first CSI, where the first CSI is measured by the first device on the CSI-RS.
The embodiment of the invention provides the second device, the first device can determine the second resource set according to the received configuration information, and receives the CSI-RS on the first transmission antenna set corresponding to the second resource set and reports the CSI, and because the first device only receives the CSI-RS on the first transmission antenna set corresponding to the second resource set for CSI reporting, instead of receiving the CSI-RS on all the transmission antenna sets for CSI reporting, CSI reporting overhead is reduced.
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 set of resources includes a sounding reference signal SRS resource set, an 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) configured to receive an SRS and obtain second CSI according to the SRS, 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, which includes a set of SRS resources or a set of SRS antenna ports.
Optionally, as an embodiment, the second device 600 further includes an obtaining module (not shown) configured to obtain third CSI based on the first CSI and the second CSI.
Optionally, as an embodiment, the CSI-RS is transmitted by the second device in a first time domain resource unit; and, the receiving module 604 receiving the SRS comprises: the receiving module 604 receives the SRS in a second time domain resource unit, wherein,
and 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, an intersection of the third resource set and the second resource set is empty.
Optionally, as an embodiment, the set of transmit antennas of the first device is smaller than the set of receive antennas.
Optionally, as an embodiment, the first CSI is reported through a high layer signaling indication, and the first CSI does not include channel quality information CQI, modulation and coding strategy MCS information, or signal to interference and noise ratio information SINR.
Optionally, as an embodiment, the purpose of the first set of resources is beam management.
The second device 600 according to the embodiment of the present invention may refer to the flow corresponding to the method 400 according to the embodiment of the present invention, and each unit/module and the other operations and/or functions in the second device 600 are respectively for implementing the corresponding flow in the method 400, and are not described herein again for brevity.
Fig. 7 is a block diagram of a terminal device of 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. The various components in the terminal device 700 are coupled together by a bus system 705. It is understood that the bus system 705 is used to enable communications among the components. The bus system 705 includes a power bus, a control bus, and a status signal bus in addition to a data bus. But for clarity of illustration the various busses are labeled in figure 7 as the bus system 705.
The user interface 703 may include, among other things, a display, a keyboard, or a pointing device (e.g., a mouse, trackball, touch pad, or touch screen, among others.
It is to be understood that the memory 702 in embodiments of the present invention may be either volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The non-volatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable PROM (EEPROM), or a flash Memory. Volatile Memory can be Random Access Memory (RAM), which acts as external cache Memory. By way of example, but not limitation, many forms of RAM are available, such as Static random access memory (Static RAM, SRAM), Dynamic Random Access Memory (DRAM), Synchronous Dynamic random access memory (Synchronous DRAM, SDRAM), Double Data rate Synchronous Dynamic random access memory (ddr SDRAM ), Enhanced Synchronous SDRAM (ESDRAM), Synchlink DRAM (SLDRAM), and direct memory bus RAM (DRRAM). The memory 702 of the systems and methods described in this embodiment of the invention is intended to comprise, without being limited to, these and any other suitable types of memory.
In some embodiments, memory 702 stores the following elements, executable modules or data structures, or a subset thereof, or an expanded set thereof: an operating system 7021 and application programs 7022.
The operating system 7021 includes various system programs, such as a framework layer, a core library layer, a driver layer, and the like, for implementing various basic services and processing hardware-based tasks. The application 7022 includes various applications, such as a Media Player (Media Player), a Browser (Browser), and the like, for implementing various application services. Programs that implement methods in accordance with embodiments of the present invention can be included within application program 7022.
In this embodiment of the present invention, the terminal device 700 further includes: a computer program stored on a memory 702 and executable on a processor 701, the computer program, when executed by the processor 701, implementing the steps of the method 100 and the method 400 as described above.
The method 100 and the method 400 disclosed in the embodiments of the present invention can be applied to the processor 701, or implemented by the processor 701. The processor 701 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method may be implemented by integrated logic circuits of hardware or instructions in the form of software in the processor 701. The Processor 701 may be a general-purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic device, or discrete hardware components. The various methods, steps and logic blocks disclosed in the embodiments of the present invention may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with 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 modules may reside in ram, flash memory, rom, prom, or eprom, registers, among other computer-readable storage media known in the art. The computer readable storage medium is located in the memory 702, and the processor 701 reads the information in the memory 702, and performs the steps of the above method in combination with the hardware thereof. In particular, the computer readable storage medium has stored thereon a computer program which, when executed by the processor 701, implements the steps of the method 100 and the method 400 as described above.
It is to be understood that the embodiments described herein may be implemented in hardware, software, firmware, middleware, microcode, or any combination thereof. For a hardware implementation, the processing units may be implemented within one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), general purpose processors, controllers, micro-controllers, microprocessors, other electronic units configured to perform the functions described herein, or a combination thereof.
For a software implementation, the techniques described in this disclosure may be implemented with modules (e.g., procedures, functions, and so on) that perform the functions described in this disclosure. The software codes may be stored in a memory and executed by a processor. The memory may be implemented within the processor or external to the processor.
The terminal device 700 can implement the processes implemented by the first device 500 and the second device 600 in the foregoing embodiments, and details are not described here to avoid repetition.
Referring to fig. 8, fig. 8 is a structural diagram of a network device applied in the embodiment of the present invention, which can implement the details of the method embodiment 400 and achieve the same effects. 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 this embodiment of the present invention, the network device 800 further includes: a computer program stored on the memory 803 and executable on the processor 801, which when executed by the processor 801, performs the steps of the method 400.
In FIG. 8, the bus architecture may include any number of interconnected buses and bridges, with one or more processors, represented by the processor 801, and various circuits, represented by the memory 803, linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 802 may be a number of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium.
The processor 801 is responsible for managing the bus architecture and general processing, and the memory 803 may store data used by the processor 801 in performing operations.
An embodiment of the present invention further 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 computer program implements the processes in the method embodiment 100 and the method embodiment 400, and can achieve the same technical effects, and in order to avoid repetition, the computer program is not described herein again. The computer-readable storage medium may be a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (21)

1. A method for reporting CSI (channel State information), 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 a first resource set;
receiving a channel state information reference signal (CSI-RS) on a first set of transmission antennas corresponding to the second set of resources according to the configuration information, wherein the CSI-RS corresponds to the first set of resources;
and measuring the CSI-RS, and reporting the first CSI according to the measurement result.
2. The method of claim 1,
the first resource set comprises a CSI-RS resource set, a CSI-RS antenna port set or a CSI reporting resource set.
3. The method of claim 1,
the second set of resources comprises a set of sounding reference signal, SRS, antenna ports, or antenna panels.
4. The method of any of claims 1 to 3, further comprising:
transmitting SRS on a second set of transmission antennas of the first device to cause a second device to obtain second CSI, wherein,
the second set of transmit antennas is a set of transmit antennas other than the first set of transmit antennas; the SRS corresponds to a third set of resources, which includes a set of SRS resources or a set of SRS antenna ports.
5. The method of claim 4,
the receiving the CSI-RS includes: receiving a CSI-RS at a first time domain resource element; and, the transmitting the SRS comprises: transmitting the SRS in a second time domain resource unit, wherein,
and the interval between the first time domain resource unit and the second time domain resource unit is smaller than a preset value.
6. The method of claim 4,
the intersection of the third resource set and the second resource set is empty.
7. The method of claim 1,
the first device has a set of transmit antennas smaller than a set of receive antennas.
8. A CSI acquisition method, the method being 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 CSI-RS (channel state information-reference signal) 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;
receiving first CSI, wherein the first CSI is obtained by the first equipment through measurement on the CSI-RS.
9. The method of claim 8,
the first resource set comprises a CSI-RS resource set, a CSI-RS antenna port set or a CSI reporting resource set.
10. The method of claim 8,
the second set of resources includes a set of SRS resources, a set of SRS antenna ports, or a set of antenna panels.
11. The method of any of claims 8 to 10, further comprising:
receiving an SRS and obtaining a second CSI according to the SRS, 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, which includes a set of SRS resources or a set of SRS antenna ports.
12. The method of claim 11, wherein the method further comprises:
and obtaining third CSI based on the first CSI and the second CSI.
13. The method of claim 11,
the CSI-RS is transmitted by the second device in a first time domain resource unit; and, the receiving the SRS comprises: receiving the SRS in a second time domain resource unit, wherein,
and the interval between the first time domain resource unit and the second time domain resource unit is smaller than a preset value.
14. The method of claim 11,
the intersection of the third resource set and the second resource set is empty.
15. The method of claim 8,
the first device has a set of transmit antennas smaller than a set of receive antennas.
16. The method of claim 8,
the first CSI is reported through a high-level signaling indication, and the first CSI does not include Channel Quality Information (CQI), Modulation and Coding Strategy (MCS) information or signal to interference and noise ratio (SINR) information.
17. The method of claim 8,
the purpose of the first set of resources is beam management.
18. A first device, comprising:
a configuration information receiving module, configured to receive configuration information, where the configuration information is used to indicate a second resource set associated with a first resource set;
a CSI-RS receiving module, configured to receive, according to the configuration information, a CSI-RS on a first set of transmission antennas corresponding to the second set of resources, where the CSI-RS corresponds to the first set of resources;
and the measurement reporting module is used for measuring the CSI-RS and reporting the first CSI according to the measurement result.
19. A second apparatus, comprising:
a sending module, configured to send configuration information, where the configuration information is used to indicate a second set of resources associated with a first set of resources, so that a first device receives a 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;
a receiving module, configured to receive first CSI, where the first CSI is obtained by the first device through measurement on the CSI-RS.
20. An apparatus, comprising: memory, processor and computer program stored on the memory and executable on the processor, which computer program, when executed by the processor, carries out the steps of the method according to any one of claims 1 to 17.
21. A computer-readable storage medium, characterized in that a computer program is stored thereon, which computer program, when being executed by a processor, realizes the steps of the method according to any one of claims 1 to 17.
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