CN105871435B - Channel state information feedback method, device and user equipment - Google Patents
Channel state information feedback method, device and user equipment Download PDFInfo
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- 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
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- 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]
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- 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
- H04B7/063—Parameters other than those covered in groups H04B7/0623 - H04B7/0634, e.g. channel matrix rank or transmit mode selection
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- 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
- H04B7/0632—Channel quality parameters, e.g. channel quality indicator [CQI]
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Abstract
The embodiment of the invention discloses a kind of channel state information feedback method, device and user equipmenies, after receiving the information feedback request that base station is sent by active antenna array, pattern information is reported to determine object feedback content based on what is carried in the request, by Physical Uplink Control Channel to base station feedback object feedback content, the first pre-coding matrix instruction of broadband in the object feedback content includes the value of two dimensions, it extends and reports content, adapt to the reporting source of channel state information demand of FD-MIMO system.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for feeding back channel state information, and a user equipment.
Background
The Multiple-Input Multiple-Output (MIMO) technology adopted by the existing Long Term Evolution (LTE) system is for a two-dimensional Multiple-Input Multiple-Output (2D-MIMO) system, and the essence of the technology is to improve transmission quality by using two-dimensional spatial freedom of electromagnetic waves propagating on a horizontal plane. With the development of Antenna technology, the conventional Antenna with the originally fixed downtilt angle gradually evolves into an Active Antenna Array (AAS) with an adjustable downtilt angle, so that the base station can adjust the Antenna in the vertical direction, and the spatial characteristics of a channel are fully utilized, thereby forming a full-dimensional MIMO technology (FD-MIMO), and making it possible to expand the beam forming dimension of the Antenna. However, the present protocol framework and technical implementation scheme also present a huge challenge, and as for a terminal, multi-dimensional channel transmission naturally generates more measurement content and feedback overhead on the basis of the problem of Channel State Information (CSI), while the present channel state information reporting mode is not enough to meet the requirements of FD-MIMO.
Therefore, how to adapt to the requirement of reporting the channel state information of the FD-MIMO system becomes an urgent problem to be solved.
Disclosure of Invention
The invention aims to provide a channel state information feedback method, a device and user equipment, which are used for adapting to the channel state information reporting requirement of an FD-MIMO system.
In order to achieve the purpose, the invention provides the following technical scheme:
a channel state information feedback method is applied to user equipment, and comprises the following steps:
receiving a channel state information feedback request sent by a base station through an active antenna array, wherein the channel state information feedback request carries reporting mode information;
determining target feedback content based on the reporting mode information, wherein if the reporting mode information is a first reporting mode, the target feedback content includes: rank information, wideband channel quality information, a wideband first precoding matrix indicator and a second precoding matrix indicator, the wideband first precoding matrix indicator comprising a first precoding matrix indicator for a wideband first spatial dimension and a first precoding matrix indicator for a wideband second spatial dimension;
and feeding back the target feedback content to the base station through a physical uplink control channel.
In the above method, preferably, the feeding back the target feedback content to the base station through a physical uplink control channel includes:
the rank information and a first precoding matrix indicator of the first space dimension of the broadband are simultaneously fed back to the base station through the physical uplink control channel;
and the broadband channel quality information and the second precoding matrix indication are simultaneously fed back to the base station through the physical uplink control channel.
In the above method, preferably, the feeding back the target feedback content to the base station through a physical uplink control channel includes:
the broadband channel quality information, the first precoding matrix indicator of the broadband first space dimension and the second precoding matrix indicator are simultaneously fed back to the base station through the physical uplink control channel;
the rank information and the first precoding matrix indicator of the second spatial dimension of the wideband are independently fed back to the base station through the physical uplink control channel.
The above method, preferably, further comprises:
if the reporting mode information is a second reporting mode, the target feedback content includes: rank information, type indication information of the broadband first precoding matrix indication, and broadband beam group indication information; the type indication information of the broadband first precoding matrix indication occupies two bits.
In the above method, preferably, the feeding back the target feedback content to the base station through a physical uplink control channel includes:
the rank information and the type indication information indicated by the broadband first precoding matrix are simultaneously fed back to the base station through the physical uplink control channel;
the rank information and the wideband beam group indication information are independently fed back to the base station through the physical uplink control channel.
The above method, preferably, further comprises:
if the reporting mode information is a third reporting mode, the target feedback content includes: rank information, narrowband channel quality information, wideband first precoding matrix indication, second precoding matrix indication, and type indication information of the wideband first precoding matrix indication; wherein the wideband first precoding matrix indication comprises a first precoding matrix indication of a wideband first spatial dimension and a first precoding matrix indication of a wideband second spatial dimension; the type indication information of the broadband first precoding matrix indication occupies two bits.
In the above method, preferably, the feeding back the target feedback content to the base station through a physical uplink control channel includes:
the narrowband channel quality information and the second precoding matrix indication are simultaneously fed back to the base station through the physical uplink control channel;
the broadband channel quality information and the broadband precoding matrix indication are simultaneously fed back to the base station through the physical uplink control channel;
the broadband channel quality information and the second precoding matrix indication are simultaneously fed back to the base station through the physical uplink control channel;
the rank information and the type indication information indicated by the broadband first precoding matrix are simultaneously fed back to the base station through the physical uplink control channel;
the rank information, the narrowband channel quality information, and the wideband first precoding matrix indicator are independently fed back to the base station through the physical uplink control channel.
The above method, preferably, further comprises:
if the reporting mode information is a fourth reporting mode, the target feedback content includes: rank information, narrowband channel quality information, wideband channel quality information, and wideband beam group indication information.
In the above method, preferably, the feeding back the target feedback content to the base station through a physical uplink control channel includes:
the rank information, the narrowband channel quality information, the wideband channel quality information, and the wideband beam group indication information are mutually independent and feed back the target feedback content to the base station through the physical uplink control channel.
A channel state information feedback device is applied to user equipment, and the device comprises:
a receiving module, configured to receive a channel state information feedback request sent by a base station through an active antenna array, where the channel state information feedback request carries reporting mode information;
a determining module, configured to determine target feedback content based on the reporting mode information, where if the reporting mode information is a first reporting mode, the target feedback content includes: rank information, wideband channel quality information, a wideband first precoding matrix indicator and a second precoding matrix indicator, the wideband first precoding matrix indicator comprising a first precoding matrix indicator for a wideband first spatial dimension and a first precoding matrix indicator for a wideband second spatial dimension;
and the feedback module is used for feeding back the target feedback content to the base station through a physical uplink control channel.
Preferably, the above apparatus further includes:
a first feedback unit, configured to simultaneously feed back the rank information and a first precoding matrix indicator of the first spatial dimension of the wideband to the base station through the physical uplink control channel; and the broadband channel quality information and the second precoding matrix indication are simultaneously fed back to the base station through the physical uplink control channel.
Preferably, the above apparatus further includes:
a second feedback unit, configured to simultaneously feed back the wideband channel quality information, the first precoding matrix indicator of the wideband first spatial dimension, and the second precoding matrix indicator to the base station through the physical uplink control channel; the rank information and the first precoding matrix indicator of the second spatial dimension of the wideband are independently fed back to the base station through the physical uplink control channel.
The above apparatus, preferably, further comprises: if the reporting mode information is a second reporting mode, the target feedback content includes: rank information, type indication information of the broadband first precoding matrix indication, and broadband beam group indication information; the type indication information of the broadband first precoding matrix indication occupies two bits.
Preferably, the above apparatus further includes:
a third feedback unit, configured to simultaneously feed back the rank information and the type indication information indicated by the wideband first precoding matrix to the base station through the physical uplink control channel; the rank information and the wideband beam group indication information are independently fed back to the base station through the physical uplink control channel.
The above apparatus, preferably, further comprises: if the reporting mode information is a third reporting mode, the target feedback content includes: rank information, narrowband channel quality information, wideband first precoding matrix indication, second precoding matrix indication, and type indication information of the wideband first precoding matrix indication; wherein the wideband first precoding matrix indication comprises a first precoding matrix indication of a wideband first spatial dimension and a first precoding matrix indication of a wideband second spatial dimension; the type indication information of the broadband first precoding matrix indication occupies two bits.
Preferably, the above apparatus further includes:
a fourth feedback unit, configured to feed back the narrowband channel quality information and the second precoding matrix indicator to the base station through the physical uplink control channel at the same time; the broadband channel quality information and the broadband precoding matrix indication are simultaneously fed back to the base station through the physical uplink control channel; the broadband channel quality information and the second precoding matrix indication are simultaneously fed back to the base station through the physical uplink control channel; the rank information and the type indication information indicated by the broadband first precoding matrix are simultaneously fed back to the base station through the physical uplink control channel; the rank information, the narrowband channel quality information, and the wideband first precoding matrix indicator are independently fed back to the base station through the physical uplink control channel.
The above apparatus, preferably, further comprises: if the reporting mode information is a fourth reporting mode, the target feedback content includes: rank information, narrowband channel quality information, wideband channel quality information, and wideband beam group indication information.
Preferably, the above apparatus further includes:
a fifth feedback unit, configured to feed back the target feedback content to the base station through the physical uplink control channel independently from each other, the rank information, the narrowband channel quality information, the wideband channel quality information, and the wideband beam group indication information.
A user equipment comprising the channel state information feedback device as described in any one of the above.
According to the above scheme, after receiving a channel state information feedback request sent by a base station through an active antenna array, the channel state information feedback method, the channel state information feedback device and the user equipment provided by the application determine target feedback content based on reporting mode information carried in the request, and feed back the target feedback content to the base station through a physical uplink control channel, wherein a broadband first precoding matrix indicator in the target feedback content comprises two-dimensional values, so that the reported content is expanded, and the channel state information reporting requirement of an FD-MIMO system is met.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a flowchart of an implementation of a channel state information feedback method according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a channel state information feedback device according to an embodiment of the present invention.
The terms "first," "second," "third," "fourth," and the like in the description and in the claims, as well as in the drawings described above, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be practiced otherwise than as specifically illustrated.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of the present invention.
For a better understanding of the present solution, some terms involved are explained first.
Omni-directional MIMO: full dimension multi-input and multi-output, FD-MIMO;
physical uplink shared channel: physical uplink shared channel, PUSCH;
physical uplink control channel: physical uplink control channel, PUCCH;
channel quality information: channel quality information, CQI;
channel state information: channel state information, CSI;
rank information: rank information, RI;
precoding matrix indication: precoding matrix indicator, PMI;
PMI type indication: PMI type indicator, PTI;
beam group indication: beam group index, BI.
The channel state information feedback method and device provided by the embodiment of the invention are applied to User Equipment (UE).
Referring to fig. 1, fig. 1 is a flowchart of an implementation of a channel state information feedback method according to an embodiment of the present invention, which may include:
step S11: receiving a channel state information feedback request sent by a base station through an active antenna array, wherein the channel state information feedback request carries reporting mode information;
in the embodiment of the invention, the base station sends the channel state information feedback request to the user equipment through the active antenna array, and requests the user equipment to feed back the channel state information.
Step S12: determining target feedback content based on the reporting mode information, wherein if the reporting mode information is the first reporting mode, the target feedback content includes: rank information, wideband channel quality information (which may be referred to as wideband CQI for short), a wideband first precoding matrix indicator (which may be referred to as wideband first PMI for short), and a second precoding matrix indicator (in the embodiment of the present invention, if not specifically indicated, the second precoding matrix indicator may be a wideband second precoding matrix indicator or a narrowband second precoding matrix indicator), where the wideband first precoding matrix indicator includes a first precoding matrix indicator of a wideband first spatial dimension and a first precoding matrix indicator of a wideband second spatial dimension;
the first precoding matrix indicator of the first spatial dimension of the wideband may be a first precoding matrix indicator of a horizontal dimension of the wideband, and the first precoding matrix indicator of the second spatial dimension of the wideband may be a first precoding matrix indicator of a vertical dimension of the wideband.
The first reporting mode is one of several preset reporting modes.
Step S13: and feeding back the target feedback content to the base station through a physical uplink control channel.
Optionally, the target feedback content may be fed back to the target feedback content in a multiple feedback manner through the physical uplink control channel, and only a part of the target feedback content is fed back to the base station through the physical uplink control channel each time.
In the embodiment of the invention, the expanded channel state information is reported through a physical uplink control channel. The reporting content is expanded, and the method adapts to the channel state information reporting requirement of the FD-MIMO system.
Optionally, an implementation manner of feeding back the target feedback content to the base station through the physical uplink control channel according to the embodiment of the present invention may be:
the rank information and the first precoding matrix indication of the first space dimension of the broadband are simultaneously fed back to the base station through a physical uplink control channel;
the broadband channel quality information and the second precoding matrix indication are simultaneously fed back to the base station through a physical uplink control channel;
the first precoding matrix indicator for the second spatial dimension of the wideband is fed back to the base station over the physical uplink control channel independently of the rank information, the first precoding matrix indicator for the first spatial dimension of the wideband, the second precoding matrix indicator, and the wideband channel quality information.
That is to say, in the embodiment of the present invention, if the reporting mode is the first reporting mode, the target feedback content may be fed back to the base station through the physical uplink control channel for three times.
Optionally, the rank information and the first precoding matrix indicator of the first spatial dimension of the wideband may be fed back to the base station first, then the wideband channel quality information and the second precoding matrix indicator are fed back to the base station, and finally the first precoding matrix indicator of the second spatial dimension of the wideband is fed back to the base station.
Optionally, another implementation manner of feeding back the target feedback content to the base station through the physical uplink control channel according to the embodiment of the present invention may be:
the method comprises the steps that broadband channel quality information, a first precoding matrix indicator and a second precoding matrix indicator of a broadband first space dimension are simultaneously fed back to a base station through a physical uplink control channel;
the rank information and the first precoding matrix indicator of the second spatial dimension of the wideband are independently fed back to the base station through the physical uplink control channel.
In the embodiment of the present invention, if the reporting mode is the first reporting mode, the target feedback content may also be fed back to the base station through the physical uplink control channel for three times.
Different from the previous embodiment, in the embodiment of the present invention, rank information may be fed back to the base station first, then wideband channel quality information, a first precoding matrix indicator and a second precoding matrix indicator of a first spatial dimension of a wideband may be fed back to the base station, and finally, a first precoding matrix indicator of a second spatial dimension of the wideband may be fed back to the base station.
Optionally, the method for feeding back channel state information provided in the embodiment of the present invention may further include:
if the reporting mode information is the second reporting mode, the target feedback content includes: rank information, type indication information (which may be abbreviated as PTI) of the wideband first precoding matrix indication, and wideband beam group indication information; the type indication information indicated by the broadband first precoding matrix occupies two bits.
In the embodiment of the invention, the type indication information of the broadband first precoding matrix indication is expanded to two bits and is used for indicating the two-dimensional channel change speed of the broadband first precoding matrix indication.
Optionally, an implementation manner of feeding back the target feedback content to the base station by the physical uplink control channel provided in the embodiment of the present invention may be:
the rank information and the type indication information indicated by the broadband first precoding matrix are simultaneously fed back to the base station through a physical uplink control channel;
the rank information and the broadband beam group indication information are independently fed back to the base station through a physical uplink control channel.
In the embodiment of the invention, if the reporting mode is the second reporting mode, the target feedback content can be fed back to the base station through the physical uplink control channel for three times.
Optionally, rank information may be fed back to the base station first; then feeding back rank information and type indication information indicated by the broadband first precoding matrix to the base station, and finally feeding back broadband beam group indication information to the base station.
Since the rank information is changed in real time, the value information may be fed back to the base station again after the rank information is fed back to the base station.
Optionally, the method for feeding back channel state information provided in the embodiment of the present invention may further include:
if the reporting mode information is the third reporting mode, the target feedback content includes: rank information, narrowband channel quality information (also called sub-band channel quality information), wideband channel quality information, wideband first precoding matrix indication, second precoding matrix indication, and type indication information of the wideband first precoding matrix indication; wherein the wideband first precoding matrix indicator comprises a first precoding matrix indicator for a wideband first spatial dimension and a first precoding matrix indicator for a wideband second spatial dimension; the type indication information of the wideband first precoding matrix indication occupies two bits.
Optionally, an implementation manner of feeding back the target feedback content to the base station through the physical uplink control channel according to the embodiment of the present invention may be:
the narrowband channel quality information and the second precoding matrix indication are simultaneously fed back to the base station through a physical uplink control channel;
the broadband channel quality information and the broadband precoding matrix indication are simultaneously fed back to the base station through a physical uplink control channel; the wideband precoding matrix indicator may be a first precoding matrix indicator of a wideband first spatial dimension, may also be a first precoding matrix indicator of a wideband second spatial dimension, may also be a second precoding matrix indicator, or may be a combination of any two of the three.
The broadband channel quality information and the second precoding matrix indication are simultaneously fed back to the base station through a physical uplink control channel;
the rank information and the type indication information indicated by the broadband first precoding matrix are simultaneously fed back to the base station through a physical uplink control channel;
the rank information, the narrowband channel quality information and the broadband first precoding matrix indication are mutually independent and fed back to the base station through a physical uplink control channel.
In the embodiment of the invention, if the reporting mode is the third reporting mode, the feedback can be given to the base station for seven times.
Optionally, the narrowband channel quality information is fed back to the base station, then the narrowband channel quality information and the second precoding matrix indicator are fed back to the base station, then the wideband channel quality and the wideband precoding indicator are fed back to the base station, then the wideband first precoding matrix indicator (the first precoding matrix indicator of the wideband first spatial dimension and/or the first precoding matrix indicator of the wideband second spatial dimension) is fed back to the base station, then the wideband channel quality information and the wideband second precoding indicator are fed back to the base station, then the rank information is fed back to the base station, and finally the rank information and the type indicator information of the wideband first precoding matrix indicator are fed back to the base station.
Optionally, if the reporting mode is the third reporting mode, the reporting order of the seven reporting modes may be adjusted based on the value of the type indication information indicated by the wideband first precoding matrix. In particular, the method comprises the following steps of,
the rank information and the type indication information indicated by the wideband first precoding matrix may be fed back to the base station first, that is, the rank information and the type indication information indicated by the wideband first precoding matrix may be fed back to the base station for the first time, where:
if the type indication information value (e.g., 00) of the broadband first precoding matrix indicator indicates that the change of the horizontal dimension and the vertical dimension of the channel is fast, feeding back the broadband channel quality information and the first precoding matrix indicator of the second spatial dimension of the broadband to the base station for the second time, feeding back the broadband channel quality information and the second precoding matrix indicator to the base station for the third time, and feeding back the broadband channel quality information and the first precoding matrix indicator of the first spatial dimension of the broadband to the base station for the fourth time. And feeding back the rest unrefed channel state information to the base station for the fifth time to the seventh time.
If the type indication information value (e.g., 01) of the wideband first precoding matrix indicator indicates that the horizontal dimension of the channel changes slowly, and the vertical dimension changes rapidly, feeding back the wideband channel quality information and the first precoding matrix indicator of the wideband second spatial dimension to the base station for the second time, feeding back the subband channel quality information, the second precoding matrix indicator of the subband and the subband number to the base station for the third time, and feeding back the remaining unrefed back channel state information to the base station for the fourth to seventh times.
If the type indication information value (e.g., 10) of the wideband first precoding matrix indicator indicates that the horizontal dimension of the channel changes faster and the vertical dimension changes slower, feeding back the wideband channel quality information and the wideband first precoding matrix indicator (the first precoding matrix indicator of the wideband first spatial dimension and/or the first precoding matrix indicator of the wideband second spatial dimension) to the base station for the second time, feeding back the wideband channel quality information and the second precoding matrix indicator to the base station for the third time, and feeding back the remaining channel state information which is not fed back to the base station for the fourth to seventh times.
If the type indication information value (e.g., 11) of the wideband first precoding matrix indicator indicates that the change of the horizontal dimension and the vertical dimension of the channel is slow, feeding back wideband channel quality information and a second precoding matrix indicator to the base station for the second time, feeding back a subband channel quality indicator, a subband second precoding matrix indicator and a subband number to the base station for the third time, and feeding back the remaining unrefed channel state information to the base station for the fourth time to the seventh time.
Optionally, the method for feeding back channel state information provided in the embodiment of the present invention may further include:
if the reporting mode information is the fourth reporting mode, the target feedback content includes: rank information, narrowband channel quality information, wideband channel quality information, and wideband beam group indication information.
In the embodiment of the invention, the broadband beam group indication information is added.
Optionally, an implementation manner of feeding back the target feedback content to the base station by the physical uplink control channel provided in the embodiment of the present invention may be:
and the rank information, the narrow-band channel quality information, the broadband channel quality information and the broadband beam group indication information are mutually independent and feed back the target feedback content to the base station through a physical uplink control channel.
That is, if the reporting mode is the fourth reporting mode, the target feedback content may be fed back to the base station through the physical uplink control channel four times.
Optionally, the narrowband channel quality information may be fed back to the base station, then the rank information may be fed back to the base station, then the wideband channel quality information may be fed back to the base station, and finally the wideband beam group indication information may be fed back to the base station.
In the embodiment of the present invention, each uploaded content may be defined as one reporting type, so that each reporting mode supports multiple reporting types, and different reporting modes may include the same reporting type. As shown in table 1, an example of reporting types corresponding to four reporting modes is provided in the embodiment of the present invention. In the context of table 1, the following,
the Mode 1-1 corresponds to a first reporting Mode, wherein the first reporting Mode further includes two Sub-modes, which are a first Sub-Mode 1 and a second Sub-Mode 2, respectively.
The modes 1-0 correspond to a second reporting Mode.
The Mode 2-1 corresponds to a third reporting Mode.
The Mode 2-0 corresponds to the fourth reporting Mode.
i1HA first precoding matrix indicator representing a wideband horizontal dimension.
i1VA first precoding matrix indicator representing a wideband vertical dimension.
TABLE 1
It should be noted that, in the embodiment of the present invention, the reporting type 2a allows reporting i in the wideband first PMI1HAlso allowing reporting of i in the wideband first PMI1VHowever, in the first sub-mode, the reporting type 2a only allows reporting i in the wideband first PMI1V。
Corresponding to the method embodiment, an embodiment of the present invention further provides a channel state information feedback device, and a schematic structural diagram of the channel state information feedback device provided in the embodiment of the present invention is shown in fig. 2, and may include:
a receiving module 21, a determining module 22 and a feedback module 23; wherein,
the receiving module 21 is configured to receive a channel state information feedback request sent by a base station through an active antenna array, where the channel state information feedback request carries reporting mode information;
the determining module 22 is configured to determine the target feedback content based on the reporting mode information, where if the reporting mode information is the first reporting mode, the target feedback content includes: the first precoding matrix indication of the broadband comprises a first precoding matrix indication of a first space dimension of the broadband and a first precoding matrix indication of a second space dimension of the broadband;
the feedback module 23 is configured to feed back target feedback content to the base station through a physical uplink control channel.
In the channel state information feedback device provided in the embodiment of the present invention, the wideband first precoding matrix indicator in the target feedback content includes two dimensional values, which expands the reported content and adapts to the channel state information reporting requirement of the FD-MIMO system
Optionally, the feedback module 23 provided in the embodiment of the present invention may include:
the first feedback unit is used for simultaneously feeding back the rank information and the first precoding matrix indication of the first space dimensionality of the broadband to the base station through a physical uplink control channel; and the broadband channel quality information and the second precoding matrix indication are simultaneously fed back to the base station through a physical uplink control channel.
Optionally, the feedback module 23 provided in the embodiment of the present invention may include:
the second feedback unit is used for simultaneously feeding back the broadband channel quality information, the first precoding matrix indication and the second precoding matrix indication of the broadband first space dimension to the base station through a physical uplink control channel; the rank information and the first precoding matrix indicator of the second spatial dimension of the wideband are independently fed back to the base station through the physical uplink control channel.
Optionally, if the reporting mode information is the second reporting mode, the target feedback content includes: rank information, type indication information of broadband first precoding matrix indication and broadband beam group indication information; the type indication information indicated by the broadband first precoding matrix occupies two bits.
Optionally, the feedback module 23 provided in the embodiment of the present invention may include:
the third feedback unit is used for simultaneously feeding back the rank information and the type indication information indicated by the broadband first precoding matrix to the base station through a physical uplink control channel; the rank information and the broadband beam group indication information are independently fed back to the base station through a physical uplink control channel.
Optionally, if the reporting mode information is the third reporting mode, the target feedback content includes: rank information, narrowband channel quality information, wideband first precoding matrix indication, second precoding matrix indication, and type indication information of the wideband first precoding matrix indication; wherein the wideband first precoding matrix indicator comprises a first precoding matrix indicator for a wideband first spatial dimension and a first precoding matrix indicator for a wideband second spatial dimension; the type indication information of the wideband first precoding matrix indication occupies two bits.
Optionally, the feedback module 23 provided in the embodiment of the present invention may include:
the fourth feedback unit is used for feeding back the narrowband channel quality information and the second precoding matrix indication to the base station through a physical uplink control channel at the same time; the broadband channel quality information and the broadband precoding matrix indication are simultaneously fed back to the base station through a physical uplink control channel; the broadband channel quality information and the second precoding matrix indication are simultaneously fed back to the base station through a physical uplink control channel; the rank information and the type indication information indicated by the broadband first precoding matrix are simultaneously fed back to the base station through a physical uplink control channel; the rank information, the narrowband channel quality information and the broadband first precoding matrix indication are mutually independent and fed back to the base station through a physical uplink control channel.
Optionally, if the reporting mode information is the fourth reporting mode, the target feedback content includes: rank information, narrowband channel quality information, wideband channel quality information, and wideband beam group indication information.
Optionally, the feedback module 23 provided in the embodiment of the present invention may include:
and the fifth feedback unit is used for feeding back target feedback contents to the base station through the physical uplink control channel independently from the rank information, the narrowband channel quality information, the broadband channel quality information and the broadband beam group indication information.
The embodiment of the invention also provides the user equipment which is provided with the channel state information feedback device disclosed by any device embodiment.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems (if any), apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the several embodiments provided in the present application, it should be understood that the disclosed system (if present), apparatus, and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. A channel state information feedback method is applied to user equipment, and is characterized in that the method comprises the following steps:
receiving a channel state information feedback request sent by a base station through an active antenna array, wherein the channel state information feedback request carries reporting mode information;
determining target feedback content based on the reporting mode information, wherein if the reporting mode information is a first reporting mode, the target feedback content includes: rank information, wideband channel quality information, a wideband first precoding matrix indicator and a second precoding matrix indicator, the wideband first precoding matrix indicator comprising a first precoding matrix indicator for a wideband first spatial dimension and a first precoding matrix indicator for a wideband second spatial dimension; if the reporting mode information is a second reporting mode, the target feedback content includes: rank information, type indication information of the broadband first precoding matrix indication, and broadband beam group indication information; the type indication information of the broadband first precoding matrix indication occupies two bits and is used for indicating the channel change speed of two space dimensions of the broadband first precoding matrix indication;
and feeding back the target feedback content to the base station through a physical uplink control channel.
2. The method of claim 1, wherein the feeding back the target feedback content to the base station through a physical uplink control channel comprises:
the rank information and a first precoding matrix indicator of the first space dimension of the broadband are simultaneously fed back to the base station through the physical uplink control channel;
and the broadband channel quality information and the second precoding matrix indication are simultaneously fed back to the base station through the physical uplink control channel.
3. The method of claim 1, wherein the feeding back the target feedback content to the base station through a physical uplink control channel comprises:
the broadband channel quality information, the first precoding matrix indicator of the broadband first space dimension and the second precoding matrix indicator are simultaneously fed back to the base station through the physical uplink control channel;
the rank information and the first precoding matrix indicator of the second spatial dimension of the wideband are independently fed back to the base station through the physical uplink control channel.
4. The method of claim 1, wherein the feeding back the target feedback content to the base station through a physical uplink control channel comprises:
the rank information and the type indication information indicated by the broadband first precoding matrix are simultaneously fed back to the base station through the physical uplink control channel;
the rank information and the wideband beam group indication information are independently fed back to the base station through the physical uplink control channel.
5. The method of claim 1, further comprising:
if the reporting mode information is a third reporting mode, the target feedback content includes: rank information, narrowband channel quality information, wideband first precoding matrix indication, second precoding matrix indication, and type indication information of the wideband first precoding matrix indication; wherein the wideband first precoding matrix indication comprises a first precoding matrix indication of a wideband first spatial dimension and a first precoding matrix indication of a wideband second spatial dimension; the type indication information of the broadband first precoding matrix indication occupies two bits.
6. The method of claim 5, wherein the feeding back the target feedback content to the base station through a physical uplink control channel comprises:
the narrowband channel quality information and the second precoding matrix indication are simultaneously fed back to the base station through the physical uplink control channel;
the broadband channel quality information and the broadband precoding matrix indication are simultaneously fed back to the base station through the physical uplink control channel;
the broadband channel quality information and the second precoding matrix indication are simultaneously fed back to the base station through the physical uplink control channel;
the rank information and the type indication information indicated by the broadband first precoding matrix are simultaneously fed back to the base station through the physical uplink control channel;
the rank information, the narrowband channel quality information, and the wideband first precoding matrix indicator are independently fed back to the base station through the physical uplink control channel.
7. The method of claim 1, further comprising:
if the reporting mode information is a fourth reporting mode, the target feedback content includes: rank information, narrowband channel quality information, wideband channel quality information, and wideband beam group indication information.
8. A channel state information feedback device applied to User Equipment (UE), the device comprising:
a receiving module, configured to receive a channel state information feedback request sent by a base station through an active antenna array, where the channel state information feedback request carries reporting mode information;
a determining module, configured to determine target feedback content based on the reporting mode information, where if the reporting mode information is a first reporting mode, the target feedback content includes: rank information, wideband channel quality information, a wideband first precoding matrix indicator and a second precoding matrix indicator, the wideband first precoding matrix indicator comprising a first precoding matrix indicator for a wideband first spatial dimension and a first precoding matrix indicator for a wideband second spatial dimension; if the reporting mode information is a second reporting mode, the target feedback content includes: rank information, type indication information of the broadband first precoding matrix indication, and broadband beam group indication information; the type indication information of the broadband first precoding matrix indication occupies two bits and is used for indicating the channel change speed of two space dimensions of the broadband first precoding matrix indication;
and the feedback module is used for feeding back the target feedback content to the base station through a physical uplink control channel.
9. A user equipment, characterized by comprising the channel state information feedback device of claim 8.
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| CN108270473B (en) * | 2017-01-04 | 2021-07-09 | 华为技术有限公司 | Data processing method, user equipment and wireless access equipment |
| CN109391313B (en) * | 2017-08-11 | 2021-11-30 | 展讯通信（上海）有限公司 | Channel state information feedback method, user terminal, base station and readable storage medium |
| CN109428636B (en) * | 2017-08-21 | 2021-10-15 | 华为技术有限公司 | Beam indication and reporting method, network equipment and terminal |
| WO2022257121A1 (en) * | 2021-06-11 | 2022-12-15 | Oppo广东移动通信有限公司 | Communication method and device, and storage medium |
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