CN109474320B - Resource allocation and channel state information reporting method and device - Google Patents

Resource allocation and channel state information reporting method and device Download PDF

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Publication number
CN109474320B
CN109474320B CN201710808022.4A CN201710808022A CN109474320B CN 109474320 B CN109474320 B CN 109474320B CN 201710808022 A CN201710808022 A CN 201710808022A CN 109474320 B CN109474320 B CN 109474320B
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rank indication
rank
value
terminal
indications
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CN109474320A (en
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李辉
拉盖施
高秋彬
陈润华
黄秋萍
缪德山
苏昕
王蒙军
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Datang Mobile Communications Equipment Co Ltd
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Telecommunications Science and Technology Research Institute Co Ltd
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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
    • H04B7/0456—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
    • 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
    • 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
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports

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Abstract

The application discloses a method and a device for resource allocation and channel state information reporting, which are used for ensuring the effective utilization of resources and ensuring the feedback precision of CSI. The resource allocation method provided by the application comprises the following steps: determining a rank indication set; and allocating uplink channel resources for the terminal according to the rank indication value in the rank indication set.

Description

Resource allocation and channel state information reporting method and device
Technical Field
The present application relates to the field of communications technologies, and in particular, to a method and an apparatus for resource allocation and channel state information reporting.
Background
The terminal calculates Channel State Information (CSI) through downlink Channel measurement. The CSI includes Channel Quality Indication (CQI), Rank Indication (RI) \ and Precoding Matrix Indication (PMI), and may also contain Channel State Information Reference Signal (also referred to as sounding Reference Signal) (CSI-RS) resource indication (CRI) Information. In order to enable the terminal to report the CSI to the base station for scheduling by the base station, the base station needs to allocate uplink channel resources for the terminal to report the CSI. For a certain codebook configuration of the base station, the CSI load reported by the terminal will dynamically change with the difference of RI. In the LTE system, for the Class a codebook or the Advanced CSI codebook, the difference of CSI loads caused by the difference of RIs is not large, so that the required uplink channel resources can be allocated according to the largest possible CSI feedback overhead.
A type I codebook and a type II codebook are defined in the NR system. The feedback information structure of the type II codebook and the PMI feedback overhead at 32 ports are given in table one and table two. Assuming that the number L of beam combinations of the codebook configured by the base station is 3, when the terminal performs CSI calculation, it may feedback RI 1 (using rank 1 codebook) or RI 2 (using rank 2 codebook). If the terminal determines RI to be 1, the total PMI is 192 bits, and if the terminal determines RI to be 2, the total PMI is 370 bits. This indicates that the dynamic range of its PMI varies greatly, and the overhead of the feedback of different RIs differs by 178 bits. Since the base station cannot know the load size of the CSI before obtaining the RI information, the base station can only allocate uplink channel resources to the terminal according to a certain possible load size. The allocation of the resources needs to ensure both the accuracy of feedback and the reasonable utilization of uplink resources.
Table one: PMI feedback overhead (wideband portion) for 32-port type II codebook
Figure BDA0001403168530000021
Table two: PMI feedback overhead (subband portion) for 32-port type II codebook
Figure BDA0001403168530000022
In summary, for the codebook defined by the NR system, the dynamic range of the load overhead is large, and if the uplink information resource is allocated according to the maximum overhead, a large waste of the resource may be caused. If the allocated uplink resource is small, the feedback accuracy cannot be guaranteed.
Disclosure of Invention
The embodiment of the application provides a method and a device for resource allocation and channel state information reporting, which are used for ensuring effective utilization of resources and ensuring feedback accuracy of CSI.
On a network side, a resource allocation method provided in an embodiment of the present application includes:
determining a rank indication set;
and allocating uplink channel resources for the terminal according to the rank indication value in the rank indication set.
According to the resource allocation method provided by the embodiment of the application, the uplink channel resources are allocated to the terminal according to the rank indication value in the rank indication set, so that the effective utilization of the resources can be ensured, and the feedback precision of the CSI is ensured.
Optionally, the set of rank indications is a second set of rank indications;
the determining the rank indication set specifically includes:
determining a first rank indication set;
determining a second rank indication set from the first rank indication set, wherein the second rank indication set is a subset of the first rank indication set.
Optionally, determining a second rank indication set according to the first rank indication set specifically includes:
selecting a rank indication from the first rank indication set based on a service condition, and generating a second rank indication set;
or selecting a rank indication from the first rank indication set based on the value of the virtual rank indication fed back by the terminal, and generating a second rank indication set.
Optionally, the determining the first rank indication set specifically includes:
determining a first rank indication set according to at least one of capability information, deployment scenarios and service conditions of the UE;
or, determining a first rank indication set according to a mode appointed with the terminal in advance.
Optionally, the values of the rank indications in the second set of rank indications are discontinuous values; and/or the presence of a gas in the gas,
the value of the rank indication in the second rank indication set is less than or equal to the value of the maximum rank indication, and the value of the maximum rank indication is determined from the first rank indication set according to the value of the virtual rank indication fed back by the terminal, or is determined from the first rank indication set based on traffic conditions.
Optionally, the method further comprises:
and informing the terminal of the related information of the second rank indication set.
Optionally, notifying the terminal of the related information of the second rank indication set, which specifically includes:
and notifying the terminal of the related information of the second rank indication set by sending physical layer signaling, high layer signaling or signaling triggered by the aperiodic Channel State Information (CSI).
Optionally, the information related to the second rank indication set specifically includes: the value of all rank indications in the second rank indication set or the value of the maximum rank indication is determined from the first rank indication set according to the value of the virtual rank indication fed back by the terminal, or is determined from the first rank indication set based on traffic conditions, and the value of the rank indication in the second rank indication set is smaller than or equal to the value of the maximum rank indication.
Optionally, the method further comprises:
receiving a value of a virtual rank indication fed back by a terminal, and determining a value of an actual rank indication according to the value of the virtual rank indication; or receiving a value of a virtual rank indication and a value of an actual rank indication fed back by the terminal;
and receiving CQI and PMI fed back by the terminal according to the value of the actual rank indication.
Optionally, the value of the actual rank indication is a value of a rank indication in the set of rank indications that is not greater than the maximum value of the virtual rank indication; alternatively, the first and second electrodes may be,
the actual rank indication value is a rank indication value determined from the set of rank indications according to base station to terminal channel conditions and/or interference conditions.
Correspondingly, on the terminal side, the method for reporting channel state information provided in the embodiment of the present application includes:
determining a rank indication set;
determining a virtual rank indication and determining an actual rank indication from the set of rank indications;
determining channel state information according to the value of the actual rank indication;
feeding back the virtual rank indication and the channel state information on uplink channel resources; or feeding back the virtual rank indication, the actual rank indication, and the channel state information.
Optionally, the set of rank indications is a second set of rank indications;
the method further comprises determining a first set of rank indications;
the virtual rank indication is determined from the set of first rank indications.
Alternatively,
the value of the actual rank indication is a value of a rank indication in the set of second rank indications that is not greater than the maximum value of the virtual rank indication; alternatively, the first and second electrodes may be,
the actual rank indication value is a rank indication value determined from the second rank indication set according to base station to terminal channel conditions and/or interference conditions.
On the network side, the resource allocation apparatus provided in this embodiment includes:
a memory for storing program instructions;
a processor for calling the program instructions stored in the memory and executing according to the obtained program:
determining a rank indication set;
and allocating uplink channel resources for the terminal according to the rank indication value in the rank indication set.
Optionally, the set of rank indications is a second set of rank indications;
the determining the rank indication set specifically includes:
determining a first rank indication set;
determining a second rank indication set from the first rank indication set, wherein the second rank indication set is a subset of the first rank indication set.
Optionally, determining a second rank indication set according to the first rank indication set specifically includes:
selecting a rank indication from the first rank indication set based on a service condition, and generating a second rank indication set;
or selecting a rank indication from the first rank indication set based on the value of the virtual rank indication fed back by the terminal, and generating a second rank indication set.
Optionally, the determining the first rank indication set specifically includes:
determining a first rank indication set according to at least one of capability information, deployment scenarios and service conditions of the UE;
or, determining a first rank indication set according to a mode appointed with the terminal in advance.
Optionally, the values of the rank indications in the second set of rank indications are discontinuous values; and/or the presence of a gas in the gas,
the value of the rank indication in the second rank indication set is less than or equal to the value of the maximum rank indication, and the value of the maximum rank indication is determined from the first rank indication set according to the value of the virtual rank indication fed back by the terminal, or is determined from the first rank indication set based on traffic conditions.
Optionally, a transceiver is further included, and the processor is further configured to: and notifying the terminal of the relevant information of the second rank indication set through a transceiver.
Optionally, notifying the terminal of the related information of the second rank indication set, which specifically includes:
and notifying the terminal of the related information of the second rank indication set by sending physical layer signaling, high layer signaling or signaling triggered by the aperiodic Channel State Information (CSI).
Optionally, the information related to the second rank indication set specifically includes: the value of all rank indications in the second rank indication set or the value of the maximum rank indication is determined from the first rank indication set according to the value of the virtual rank indication fed back by the terminal, or is determined from the first rank indication set based on traffic conditions, and the value of the rank indication in the second rank indication set is smaller than or equal to the value of the maximum rank indication.
Optionally, a transceiver is further included, and the processor is further configured to:
receiving, by the transceiver, a value of a virtual rank indication fed back by a terminal, and determining a value of an actual rank indication according to the value of the virtual rank indication; or receiving a value of a virtual rank indication and a value of an actual rank indication fed back by the terminal;
and receiving CQI and PMI fed back by the terminal through the transceiver according to the value of the actual rank indication.
Optionally, the value of the actual rank indication is a value of a rank indication in the set of rank indications that is not greater than the maximum value of the virtual rank indication; alternatively, the first and second electrodes may be,
the actual rank indication value is a rank indication value determined from the set of rank indications according to base station to terminal channel conditions and/or interference conditions.
Correspondingly, on the terminal side, the apparatus for reporting channel state information provided in the embodiment of the present application includes:
a memory for storing program instructions;
a processor for calling the program instructions stored in the memory and executing according to the obtained program:
determining a second rank indication set;
determining an actual rank indication from the set of second rank indications;
determining channel state information according to the value of the actual rank indication;
feeding back the virtual rank indication and the channel state information on uplink channel resources; or feeding back the virtual rank indication, the actual rank indication, and the channel state information.
Optionally, the set of rank indications is a second set of rank indications;
the processor is further configured to determine a first set of rank indications;
the virtual rank indication is determined from the set of first rank indications.
Alternatively,
the value of the actual rank indication is a value of a rank indication in the set of rank indications that is not greater than the maximum value of the virtual rank indication; alternatively, the first and second electrodes may be,
the actual rank indication value is a rank indication value determined from the set of rank indications according to base station to terminal channel conditions and/or interference conditions.
On the network side, a second resource allocation apparatus provided in the embodiment of the present application includes:
a determining unit, configured to determine a rank indication set;
and the allocation unit is used for allocating uplink channel resources for the terminal according to the rank indication value in the rank indication set.
On the terminal side, a second apparatus for reporting channel state information provided in this embodiment includes:
a first unit for determining a set of rank indications;
a second unit for determining a virtual rank indication and determining an actual rank indication from the set of rank indications;
a third unit, configured to determine channel state information according to the value of the actual rank indication;
a fourth unit, configured to feed back the virtual rank indication and the channel state information on an uplink channel resource; or feeding back the virtual rank indication, the actual rank indication, and the channel state information.
A computer storage medium provided in an embodiment of the present application stores computer-executable instructions, where the computer-executable instructions are configured to enable a computer to execute any one of the methods provided in the embodiment of the present application.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic diagram of CSI information (including CRI) fed back by a terminal according to an embodiment of the present application;
fig. 2 is a schematic diagram of CSI information (including CRI) fed back by another terminal according to an embodiment of the present application;
fig. 3 is a schematic flowchart of a resource allocation method according to an embodiment of the present application;
fig. 4 is a schematic flow chart of a method for reporting channel state information according to an embodiment of the present application;
fig. 5 is a schematic structural diagram of a resource allocation apparatus according to an embodiment of the present application;
fig. 6 is a schematic structural diagram of a device for reporting channel state information according to an embodiment of the present application;
fig. 7 is a schematic structural diagram of another resource allocation apparatus according to an embodiment of the present application;
fig. 8 is a schematic structural diagram of another apparatus for reporting csi according to an embodiment of the present application.
Detailed Description
The embodiment of the application provides a method and a device for resource allocation and channel state information reporting, which are used for ensuring effective utilization of resources and ensuring feedback accuracy of CSI.
In the MIMO system, when the terminal reports the CSI information, the load overhead changes dynamically. For the dynamically changing load overhead, the base station needs to reasonably allocate uplink resources to achieve effective utilization of resources.
The embodiment of the application provides an uplink channel resource allocation method and a CSI feedback scheme aiming at the problem that the feedback dynamic range of a Type (Type) II codebook in an NR system is large.
The specific process flow is illustrated as follows:
the method comprises the following steps: a base station determines a Rank Indicator (RI) value set, and records the RI value set as a first RI set; the first RI set is a constant set or a semi-statically varying set; the number of elements in the first RI set may be 1 or greater than 1.
Alt-1: the base station determines a first RI set according to the capability information, deployment scene, service condition and the like of the UE, and sends the first RI set to the terminal through physical layer signaling or high-level signaling and the like; the higher layer signaling here is similar to CSR signaling. For example, if the capability reporting information of the UE shows that the UE supports 2-stream transmission at most, the first RI set may be {1,2 }; for another example, if the base station desires the terminal to report CSI of a single stream to better support MU-MIMO transmission, the first RI set may be {1 }.
Alt-2: the base station and the terminal determine the available first set of RIs in a conventional manner, for example, the first set of RIs is {1,2, …,7,8} as a conventional protocol, and no feedback from the terminal is required.
Step two: the base station selects one or more RI values from the first RI set to form a second RI set, wherein the second RI set is a subset of the first RI set. The base station selects the following modes:
selection based on the service conditions: for example, the first RI set is {1,2,3,4}, and the base station determines to increase the ratio of multiuser scheduling according to the change of service, for example, the increase of system load, so that it is expected that the terminal feeds back the channel state information of low rank, and then the second RI set can be selected to be {1,2 };
reporting based on terminal feedback: for example, if the first RI set is {1,2,3,4}, and the virtual RI value reported by the terminal over a period of time (or the virtual RI value reported last time) is 1, the base station expects that the terminal will report low rank channel information in a future period of time, and the base station may determine the second RI set as {1,2 }. The base station determines a second RI set by taking the virtual RI reported by the terminal last time as a reference; and allocating uplink channel resources to the terminal according to the RI values in the second RI set, so that the effective utilization of the uplink channel resources can be further ensured, and the accuracy of CSI feedback can be further ensured.
The RI values in the second set of RIs may be discontinuous, for example, the first set of RIs is {1,2,3,4}, and the second set of RIs may be {1,3 }.
The second RI set may be formed by all RI values less than or equal to a certain RI value (maximum RI value) in the first RI set, for example, the first RI value set is {1,2,3,4}, and the base station determines that the maximum RI value is 2 according to the content previously fed back by the terminal, and then the second RI set is {1,2 }.
Step three: and the base station informs the terminal of the information related to the second RI set. The specific mode is as follows:
the first method is as follows: the base station notifies the RI values in the second RI set to the terminal, for example, the second RI set is {1,3}, and the two values of the base station are both sent to the terminal;
the second method comprises the following steps: the base station notifies the terminal of the maximum RI value, the RI values in the first set which are less than or equal to the maximum RI value form a second set, for example, the first RI value set is {1,2,3,4}, the base station determines that the maximum RI value is 2 according to the content previously fed back by the terminal, the second RI set is {1,2}, the base station only needs to notify the terminal of the maximum RI value, and the terminal can determine the second RI set. The base station determines a second RI set by taking the virtual RI reported by the terminal last time as a reference; and allocating uplink channel resources to the terminal according to the RI values in the second RI set, so that the effective utilization of the uplink channel resources can be further ensured, and the accuracy of CSI feedback can be further ensured. It should be noted that the virtual RI value described in this embodiment is relative to an actual RI value, and has no special meaning, but is only one RI value in the first RI set, and the RI value is distinguished from an RI value actually adopted by the UE.
For example, the base station may send physical layer signaling or higher layer signaling, or send aperiodic CSI-triggered signaling, and may carry the second RI set related information therein. If the resource quantity required by the aperiodic CSI report is related to the RI value fed back by the terminal, the resource allocated by the base station to the terminal can be allocated according to the maximum RI value in the second RI set.
Step four: and the terminal receives the signaling sent by the base station and determines a first RI set and a second RI set.
Step five: the terminal calculates the channel state information:
the terminal selects a virtual RI value from the first RI set according to the channel condition and the interference condition from the base station to the terminal, wherein the specific selection method can adopt the method of selecting RI in the prior art, and the virtual RI value represents the number of data streams which can be supported by the channel from the base station to the terminal and are transmitted in parallel;
step six: the terminal determines the actual RI value:
alt-1, the actual RI value being the largest RI value within the second RI set that is not greater than the virtual RI value.
And Alt-2, wherein the actual RI value is the optimal RI value determined by the terminal from the second RI set through calculation according to the channel condition, the interference condition and the like from the base station to the terminal.
Step seven: the terminal calculates CQI, PMI, etc. (and may also include CRI) from the actual RI value and the base station-to-terminal channel conditions and interference conditions, etc. For example, for Alt-1, the first set of RIs is {1,2}, the second set of RIs is {1}, the virtual RI value selected by the terminal is 2, and the actual RI is 1. That is, the terminal calculates CQI and PMI according to RI 1, and the PMI calculated by the terminal corresponds to the precoding matrix of only one data stream. The resource fed back by the uplink CSI is allocated according to the maximum RI value (1) in the second RI set, so the CQI and PMI calculated by the terminal according to RI ═ 1 can be transmitted in the allocated resource. For Alt-2, the first RI set is {1,2,3,4}, the second RI set is {1,2,3}, the virtual RI value selected by the terminal is 4, and the actual RI determined by calculation is 2. That is, the terminal calculates CQI and PMI according to RI 2, and the PMI calculated by the terminal corresponds to the precoding matrix of two data streams. The resource fed back by the uplink CSI is allocated according to the largest RI value (3) in the second RI set, so the CQI and PMI calculated by the terminal according to RI ═ 2 can be transmitted in the allocated resource.
For Alt-1, the terminal feeds back the virtual RI value, and information such as CQI and PMI, as shown in fig. 1. The bit number of the virtual RI value fed back by the terminal is determined by the number of elements in the first RI set or is a fixed value.
Or
For Alt-2, the terminal feeds back information such as a virtual RI value, an actual RI value, CQI, PMI, and the like, as shown in fig. 2. The bit number of the virtual RI value fed back by the terminal is determined by the number of elements in the first RI set or is a fixed value, and the bit number of the actual RI value fed back by the terminal is determined by the number of elements in the second RI set or is a fixed value.
Step eight:
and aiming at Alt-1, the base station receives the virtual RI value fed back by the terminal and determines an actual RI value according to the virtual RI value, wherein the actual RI value is the maximum RI value which is not more than the virtual RI value in the second RI set.
And aiming at Alt-2, the base station receives the virtual RI value and the actual RI value fed back by the terminal.
And the base station receives information such as CQI, PMI and the like fed back by the terminal according to the actual RI value. The method comprises the steps of determining the bit number of information such as CQI, PMI and the like fed back by a terminal according to an actual RI value, and receiving.
An illustration of several specific embodiments is given below.
The first embodiment is as follows:
assume that the base station configures a 32-port type II codebook, and the codebook parameter L is 3, and the number of feedback subbands is 10. The system predefines an RI overhead of 3 bits. When the rank (rank) is 1 to 4, only one codeword (code word) is provided, and the CQI of each subband is 4 bits. When RI is 3, overhead of PMI is 548 bits; when RI is 4, overhead of PMI is 726 bits. Assuming that the allowed RI values in the CSR constraint information are more than 1, the CSI information fed back by the terminal includes two RIs at this time.
A base station side:
the protocol agrees that the first set of RIs is 1,2,3,4 and does not change.
The base station determines that the second set of RIs is {1,2 }. The base station determines to allocate uplink channel resources with RI 2. From table one, the PMI load overhead of RI ═ 2 is 370 bits. Considering 3 bits of overhead of RI and 40 bits of CQI overhead of 10 subbands, the overhead of CSI corresponding to RI + PMI + CQI + 3+370+40 is 413 bits.
The base station triggers the terminal to feed back the CSI information through signaling, and sends the information of the second RI set to the terminal (which can be sent through CSR information). And allocates uplink channel resources according to the resources occupied by the 413-bit information.
And the base station receives the CSI information fed back by the terminal. Decoding the information to obtain the PMI and CQI fed back by the terminal, as well as the actual RI equal to 2 and the virtual RI equal to 3.
The base station combines the actual RI 2, PMI and CQI, and performs scheduling.
And the base station determines that the second RI set is {1,2,3} according to the virtual RI-3. The base station determines to allocate uplink channel resources with RI 3. The PMI load overhead according to the aforementioned assumption that RI is 3 is 548 bits. Considering the overhead of RI 3 bits and the CQI overhead of 10 subbands 40 bits, the overhead of CSI corresponding to RI + PMI + CQI + 3+548+40 + 591 bits is RI + PMI + CQI + 3+548+ 40.
The base station triggers the terminal to feed back the CSI information through signaling, and sends the information of the second RI set to the terminal (which can be sent through CSR information). And allocating uplink channel resources according to the resources occupied by the 591-bit information.
And the base station receives the CSI information fed back by the terminal. Decoding the information to obtain the PMI and CQI fed back by the terminal, and the actual RI is 3 and the virtual RI is 4.
The base station combines the actual RI with 3, PMI and CQI, and performs scheduling. The second set of RIs is determined to be {1,2,3,4 }.
A terminal side:
and the terminal receives the information of the second RI set sent by the base station terminal, and determines that the first RI set is {1,2,3,4} and the second RI set is {1,2} according to protocol agreement.
The terminal calculates a virtual RI from the first RI set {1,2,3,4} to be 3 based on channel measurement.
And the terminal calculates the actual RI to be 2 from the second RI set {1,2} according to the channel measurement. And calculates PMI \ CQI information corresponding to the actual RI information.
The terminal jointly forms CSI information by the actual RI-2 and the PMI \ CQI information corresponding to the actual RI-2 and the virtual RI-3. And feeding back the CSI information on the uplink channel resources allocated by the base station according to the 413-bit information.
And the terminal receives the information of the second RI set sent by the base station and determines that the second RI set is {1,2,3 }.
The terminal calculates a virtual RI from the first RI set {1,2,3,4} to be 4 based on channel measurement.
The terminal calculates the actual RI from the second RI set {1,2,3} to be 3 based on the channel measurements. And calculates PMI \ CQI information corresponding to the actual RI information.
The terminal jointly forms CSI information by using the actual RI-3 and the PMI \ CQI information corresponding to the actual RI-3 and the virtual RI-4. And feeding back the CSI information on the uplink channel resources allocated by the base station according to the 591-bit information.
Example two:
the first set of RIs is {1,2 }. And the second RI set is {1} when the nth trigger is triggered, and the actual RI value is 1 if the virtual RI value selected by the terminal is 2. That is, the terminal calculates CQI and PMI according to RI 1, and the PMI calculated by the terminal corresponds to the precoding matrix of only one data stream. The resource fed back by the uplink CSI is allocated according to the maximum RI value (1) in the second RI set, so the CQI and PMI calculated by the terminal according to RI ═ 1 can be transmitted in the allocated resource.
Since the virtual RI value reported by the terminal is 2, it indicates that the channel from the base station to the terminal can support 2-stream transmission, and the base station triggers for the (n + 1) -th time that the second set is {1,2}, that is, the terminal can feed back the PMI and CQI of two data streams at most. And the base station allocates the uplink feedback resources according to the data quantity fed back by the 2 data streams. Because the base station still selects the virtual RI value as 2 with a higher probability, the actual RI value is also 2, and the uplink resources are fully utilized.
Example three:
the first set of RIs is {1,2 }. And the second RI set is {1,2} when the nth trigger is triggered, and the actual RI is 1 if the virtual RI value selected by the terminal is 1. That is, the terminal calculates CQI and PMI according to RI 1, and the PMI calculated by the terminal corresponds to the precoding matrix of only one data stream. The resource fed back by the uplink CSI is allocated according to the maximum RI value (2) in the second RI set, and the CQI and PMI calculated by the terminal according to RI ═ 1 can be transmitted in the allocated resource, which results in a certain waste of resources.
Because the virtual RI value reported by the terminal is 1, it indicates that the channel from the base station to the terminal can only support 1-stream transmission, and the base station triggers for the (n + 1) -th time to make the second set {1}, i.e., the terminal can only feed back the PMI and CQI of 1 data stream at most. And the base station allocates the uplink feedback resources according to the data quantity fed back by the 1 data stream. Because the base station still selects the virtual RI value as 1 with a larger probability, the actual RI value is also 1, and the waste of resources is reduced.
In the above embodiments, the base station is taken as an example to perform resource allocation as a network side device, but it is needless to say that other network entities may also perform the resource allocation method described in the embodiments of the present application.
Therefore, on the network side, referring to fig. 3, a resource allocation method provided in an embodiment of the present application includes:
s101, determining a rank indication set;
and S102, allocating uplink channel resources for the terminal according to the rank indication value in the rank indication set.
It should be noted that, in the embodiment of the present application, only one rank indication set may be determined, and uplink channel resources are allocated to the terminal according to a value of a rank indication in the rank indication set. And a plurality of rank indication sets can be determined, and uplink channel resources are allocated to the terminal according to the rank indication value in one of the rank indication sets.
Optionally, the rank indication set is a second rank indication set, such as the second RI set described above;
the determining the rank indication set specifically includes:
determining a first rank indication set, e.g., the first RI set described above;
determining a second rank indication set from the first rank indication set, wherein the second rank indication set is a subset of the first rank indication set.
Optionally, determining a second rank indication set according to the first rank indication set specifically includes:
selecting a rank indication from the first rank indication set based on a service condition, and generating a second rank indication set;
or selecting a rank indication from the first rank indication set based on the value of the virtual rank indication fed back by the terminal, and generating a second rank indication set. Therefore, the uplink channel resources allocated to the terminal can be better utilized.
Optionally, the determining the first rank indication set specifically includes:
determining a first rank indication set according to at least one of capability information, deployment scenarios and service conditions of the UE;
or, determining a first rank indication set according to a mode appointed with the terminal in advance.
Optionally, the values of the rank indications in the second set of rank indications are discontinuous values; and/or the presence of a gas in the gas,
the value of the rank indication in the second rank indication set is less than or equal to the value of the maximum rank indication, and the value of the maximum rank indication is determined from the first rank indication set according to the value of the virtual rank indication fed back by the terminal, or is determined from the first rank indication set based on traffic conditions.
Optionally, the method further comprises:
and informing the terminal of the related information of the second rank indication set.
Optionally, notifying the terminal of the related information of the second rank indication set, which specifically includes:
and notifying the terminal of the related information of the second rank indication set by sending physical layer signaling, high layer signaling or signaling triggered by the aperiodic Channel State Information (CSI).
Optionally, the information related to the second rank indication set specifically includes: the value of all rank indications in the second rank indication set or the value of the maximum rank indication is determined from the first rank indication set according to the value of the virtual rank indication fed back by the terminal, or is determined from the first rank indication set based on traffic conditions, and the value of the rank indication in the second rank indication set is smaller than or equal to the value of the maximum rank indication.
Optionally, the method further comprises:
receiving a value of a virtual rank indication fed back by a terminal, and determining a value of an actual rank indication according to the value of the virtual rank indication; or receiving a value of a virtual rank indication and a value of an actual rank indication fed back by the terminal;
and receiving the CQI and PMI fed back by the terminal, namely the CSI fed back by the terminal according to the value of the actual rank indication.
Optionally, the value of the actual rank indication is a value of a rank indication in the set of rank indications that is not greater than the maximum value of the virtual rank indication; alternatively, the first and second electrodes may be,
the actual rank indication value is a rank indication value determined from the set of rank indications according to base station to terminal channel conditions and/or interference conditions.
Correspondingly, on the terminal side, referring to fig. 4, a method for reporting channel state information provided in the embodiment of the present application includes:
s201, determining a rank indication set;
s202, determining a virtual rank indication, and determining an actual rank indication from the rank indication set;
s203, determining channel state information according to the value of the actual rank indication;
s204, feeding back the virtual rank indication and the channel state information on uplink channel resources; or feeding back the virtual rank indication, the actual rank indication, and the channel state information.
Optionally, the set of rank indications is a second set of rank indications;
the method further comprises determining a first set of rank indications;
the virtual rank indication is determined from the set of first rank indications.
Optionally, the second rank indication set is a subset of the first rank indication set, and is determined by the terminal according to signaling sent by the base station side.
The terminal feeds back the virtual rank indication to the base station, so that the base station can perform uplink channel resource allocation next time based on the virtual rank indication, that is, a new second rank indication set is determined according to the virtual rank indication, and uplink channel resource allocation is performed according to the second rank indication set.
Alternatively,
the value of the actual rank indication is a value of a rank indication in the set of second rank indications that is not greater than the maximum value of the virtual rank indication; alternatively, the first and second electrodes may be,
the actual rank indication value is a rank indication value determined from the second rank indication set according to base station to terminal channel conditions and/or interference conditions.
The following describes the apparatus provided in the embodiments of the present application.
On the network side, referring to fig. 5, the resource allocation apparatus provided in this embodiment includes:
a memory 520 for storing program instructions;
a processor 500 for calling the program instructions stored in the memory, and executing, according to the obtained program:
determining a rank indication set;
and allocating uplink channel resources for the terminal according to the rank indication value in the rank indication set.
Optionally, the set of rank indications is a second set of rank indications;
the determining the rank indication set specifically includes:
determining a first rank indication set;
determining a second rank indication set from the first rank indication set, wherein the second rank indication set is a subset of the first rank indication set.
Optionally, determining a second rank indication set according to the first rank indication set specifically includes:
selecting a rank indication from the first rank indication set based on a service condition, and generating a second rank indication set;
or selecting a rank indication from the first rank indication set based on the value of the virtual rank indication fed back by the terminal, and generating a second rank indication set.
Optionally, the determining the first rank indication set specifically includes:
determining a first rank indication set according to at least one of capability information, deployment scenarios and service conditions of the UE;
or, determining a first rank indication set according to a mode appointed with the terminal in advance.
Optionally, the values of the rank indications in the second set of rank indications are discontinuous values; and/or the presence of a gas in the gas,
the value of the rank indication in the second rank indication set is less than or equal to the value of the maximum rank indication, and the value of the maximum rank indication is determined from the first rank indication set according to the value of the virtual rank indication fed back by the terminal, or is determined from the first rank indication set based on traffic conditions.
Optionally, a transceiver 510 is further included, and the processor is further configured to: and notifying the terminal of the relevant information of the second rank indication set through a transceiver.
Optionally, notifying the terminal of the related information of the second rank indication set, which specifically includes:
and notifying the terminal of the related information of the second rank indication set by sending physical layer signaling, high layer signaling or signaling triggered by the aperiodic Channel State Information (CSI).
Optionally, the information related to the second rank indication set specifically includes: the value of all rank indications in the second rank indication set or the value of the maximum rank indication is determined from the first rank indication set according to the value of the virtual rank indication fed back by the terminal, or is determined from the first rank indication set based on traffic conditions, and the value of the rank indication in the second rank indication set is smaller than or equal to the value of the maximum rank indication.
Optionally, a transceiver is further included, and the processor is further configured to:
receiving, by the transceiver, a value of a virtual rank indication fed back by a terminal, and determining a value of an actual rank indication according to the value of the virtual rank indication; or receiving a value of a virtual rank indication and a value of an actual rank indication fed back by the terminal;
and receiving CQI and PMI fed back by the terminal through the transceiver according to the value of the actual rank indication.
A transceiver 510 for receiving and transmitting data under the control of the processor 500.
Wherein in fig. 5, the bus architecture may include any number of interconnected buses and bridges, with one or more processors, represented by processor 500, and various circuits, represented by memory 520, being 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 510 may be a number of elements, including a transmitter and a transceiver, providing a means for communicating with various other apparatus over a transmission medium. The processor 500 is responsible for managing the bus architecture and general processing, and the memory 520 may store data used by the processor 500 in performing operations.
The processor 500 may be a Central Processing Unit (CPU), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA), or a Complex Programmable Logic Device (CPLD).
Correspondingly, on the terminal side, referring to fig. 6, an apparatus for reporting channel state information provided in an embodiment of the present application includes:
a memory 620 for storing program instructions;
a processor 600, configured to call the program instructions stored in the memory, and execute, according to the obtained program:
determining a rank indication set;
determining a virtual rank indication and determining an actual rank indication from the set of rank indications;
determining channel state information according to the value of the actual rank indication;
feeding back the virtual rank indication, as well as the channel state information, by transceiver 610 on uplink channel resources; alternatively, the virtual rank indication, the actual rank indication, and the channel state information are fed back through the transceiver 610 on uplink channel resources.
Optionally, the set of rank indications is a second set of rank indications;
the processor is further configured to determine a first set of rank indications;
the virtual rank indication is determined from the set of first rank indications.
Alternatively,
the value of the actual rank indication is a value of a rank indication in the set of second rank indications that is not greater than the maximum value of the virtual rank indication; alternatively, the first and second electrodes may be,
the actual rank indication value is a rank indication value determined from the second rank indication set according to base station to terminal channel conditions and/or interference conditions.
A transceiver 610 for receiving and transmitting data under the control of the processor 600.
Where in fig. 6, the bus architecture may include any number of interconnected buses and bridges, with various circuits being linked together, particularly one or more processors represented by processor 600 and memory represented by memory 620. 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 610 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. For different user devices, the user interface 630 may also be an interface capable of interfacing with a desired device externally, including but not limited to a keypad, display, speaker, microphone, joystick, etc.
The processor 600 is responsible for managing the bus architecture and general processing, and the memory 620 may store data used by the processor 600 in performing operations.
Alternatively, the processor 600 may be a CPU (central processing unit), an ASIC (Application Specific Integrated Circuit), an FPGA (Field Programmable Gate Array), or a CPLD (Complex Programmable Logic Device).
On the network side, referring to fig. 7, a second resource allocation apparatus provided in an embodiment of the present application includes:
a determining unit 11, configured to determine a rank indication set;
and the allocating unit 12 is configured to allocate uplink channel resources to the terminal according to the value of the rank indication in the rank indication set.
Referring to fig. 8, a second apparatus for reporting channel state information provided in an embodiment of the present application on a terminal side includes:
a first unit 21 configured to determine a rank indication set;
a second unit 22, configured to determine a virtual rank indication and determine an actual rank indication from the set of rank indications;
a third unit 23, configured to determine channel state information according to the value of the actual rank indication;
a fourth unit 24, configured to feed back the virtual rank indication and the channel state information on uplink channel resources; or feeding back the virtual rank indication, the actual rank indication, and the channel state information.
A computer storage medium provided in an embodiment of the present application stores computer-executable instructions, where the computer-executable instructions are configured to enable a computer to execute any one of the methods provided in the embodiment of the present application. The computer storage media may be any available media or data storage device that can be accessed by a computer, including, but not limited to, magnetic memory (e.g., floppy disks, hard disks, magnetic tape, magneto-optical disks (MOs), etc.), optical memory (e.g., CDs, DVDs, BDs, HVDs, etc.), and semiconductor memory (e.g., ROMs, EPROMs, EEPROMs, non-volatile memory (NAND FLASH), Solid State Disks (SSDs)), etc.
The method provided by the embodiment of the application can be applied to terminal equipment and also can be applied to network equipment.
The Terminal device may also be referred to as a User Equipment (User Equipment, abbreviated as "UE"), a Mobile Station (Mobile Station, abbreviated as "MS"), a Mobile Terminal (Mobile Terminal), or the like, and optionally, the Terminal may have a capability of communicating with one or more core networks through a Radio Access Network (RAN), for example, the Terminal may be a Mobile phone (or referred to as a "cellular" phone), a computer with Mobile property, or the like, and for example, the Terminal may also be a portable, pocket, hand-held, computer-built-in, or vehicle-mounted Mobile device.
A network device may be a base station (e.g., access point) that refers to a device in an access network that communicates over the air-interface, through one or more sectors, with wireless terminals. The base station may be configured to interconvert received air frames and IP packets as a router between the wireless terminal and the rest of the access network, which may include an Internet Protocol (IP) network. The base station may also coordinate management of attributes for the air interface. For example, the Base Station may be a Base Transceiver Station (BTS) in GSM or CDMA, a Base Station (NodeB) in WCDMA, or an evolved Node B (NodeB or eNB or e-NodeB) in LTE, which is not limited in this embodiment.
The above method processing flow may be implemented by a software program, which may be stored in a storage medium, and when the stored software program is called, the flow of steps in any of the above methods is executed.
To sum up, in the technical solution provided in this embodiment, the base station allocates uplink channel resources to the terminal according to the RI value in the second RI set; and the terminal determines the value of the actual RI from the second RI set and calculates PMI \ CQI information corresponding to the actual RI. Meanwhile, the terminal feeds back a virtual RI value obtained by calculation from the first RI set; the terminal feeds back the virtual RI, or the virtual RI + the actual RI; and the base station determines the RI value in the second RI set according to the virtual RI information fed back by the terminal. Therefore, for the codebook defined for the NR system in the prior art, the dynamic range of the load overhead is large, and if the uplink information resource is allocated according to the maximum overhead, a large waste of the resource may be caused; if the allocated uplink resource is small, the feedback accuracy cannot be guaranteed. The embodiment of the application can simultaneously ensure the feedback precision and the effective utilization of resources.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.

Claims (23)

1. A method for resource allocation, the method comprising:
determining a rank indication set;
allocating uplink channel resources for the terminal according to the rank indication value in the rank indication set;
wherein the set of rank indications is a second set of rank indications;
the determining the rank indication set specifically includes:
determining a first rank indication set;
determining a second rank indication set from the first rank indication set, wherein the second rank indication set is a subset of the first rank indication set.
2. The method according to claim 1, wherein determining a second rank indication set according to the first rank indication set comprises:
selecting a rank indication from the first rank indication set based on a service condition, and generating a second rank indication set;
or selecting a rank indication from the first rank indication set based on the value of the virtual rank indication fed back by the terminal, and generating a second rank indication set.
3. The method according to claim 1, wherein the determining the first rank indication set specifically comprises:
determining a first rank indication set according to at least one of capability information, deployment scenarios and service conditions of the UE;
or, determining a first rank indication set according to a mode appointed with the terminal in advance.
4. The method according to any of claims 1 to 3, wherein the values of the rank indications in the second set of rank indications are discontinuous values; and/or the presence of a gas in the gas,
the value of the rank indication in the second rank indication set is less than or equal to the value of the maximum rank indication, and the value of the maximum rank indication is determined from the first rank indication set according to the value of the virtual rank indication fed back by the terminal, or is determined from the first rank indication set based on traffic conditions.
5. The method of any one of claims 1 to 3, further comprising:
and informing the terminal of the related information of the second rank indication set.
6. The method according to claim 5, wherein notifying the terminal of the information related to the second rank indication set specifically includes:
and notifying the terminal of the related information of the second rank indication set by sending physical layer signaling, high layer signaling or signaling triggered by the aperiodic Channel State Information (CSI).
7. The method according to claim 6, wherein the information related to the second rank indication set specifically includes: the value of all rank indications in the second rank indication set or the value of the maximum rank indication is determined from the first rank indication set according to the value of the virtual rank indication fed back by the terminal, or is determined from the first rank indication set based on traffic conditions, and the value of the rank indication in the second rank indication set is smaller than or equal to the value of the maximum rank indication.
8. The method of claim 1, further comprising:
receiving a value of a virtual rank indication fed back by a terminal, and determining a value of an actual rank indication according to the value of the virtual rank indication; or receiving a value of a virtual rank indication and a value of an actual rank indication fed back by the terminal;
and receiving CQI and PMI fed back by the terminal according to the value of the actual rank indication.
9. The method of claim 8,
the value of the actual rank indication is a value of a rank indication in the set of rank indications that is not greater than the maximum value of the virtual rank indication; alternatively, the first and second electrodes may be,
the actual rank indication value is a rank indication value determined from the set of rank indications according to base station to terminal channel conditions and/or interference conditions.
10. A method for reporting channel state information is characterized by comprising the following steps:
determining a rank indication set;
determining a virtual rank indication and determining an actual rank indication from the set of rank indications;
determining channel state information according to the value of the actual rank indication;
feeding back the virtual rank indication and the channel state information on uplink channel resources; or, feeding back the virtual rank indication, the actual rank indication, and the channel state information;
wherein the set of rank indications is a second set of rank indications;
the method further comprises determining a first set of rank indications; the second set of rank indications is a subset of the first set of rank indications;
the virtual rank indication is determined from the set of first rank indications.
11. The method of claim 10,
the value of the actual rank indication is a value of a rank indication in the set of rank indications that is not greater than the maximum value of the virtual rank indication; alternatively, the first and second electrodes may be,
the actual rank indication value is a rank indication value determined from the set of rank indications according to base station to terminal channel conditions and/or interference conditions.
12. A resource allocation apparatus, comprising:
a memory for storing program instructions;
a processor for calling the program instructions stored in the memory and executing according to the obtained program:
determining a rank indication set;
allocating uplink channel resources for the terminal according to the rank indication value in the rank indication set;
wherein the set of rank indications is a second set of rank indications;
the determining the rank indication set specifically includes:
determining a first rank indication set;
determining a second rank indication set from the first rank indication set, wherein the second rank indication set is a subset of the first rank indication set.
13. The apparatus of claim 12, wherein determining a second rank indication set according to the first rank indication set comprises:
selecting a rank indication from the first rank indication set based on a service condition, and generating a second rank indication set;
or selecting a rank indication from the first rank indication set based on the value of the virtual rank indication fed back by the terminal, and generating a second rank indication set.
14. The apparatus according to claim 12, wherein the determining the first rank indication set specifically comprises:
determining a first rank indication set according to at least one of capability information, deployment scenarios and service conditions of the UE;
or, determining a first rank indication set according to a mode appointed with the terminal in advance.
15. The apparatus according to any of claims 12-14, wherein the values of the rank indications in the second set of rank indications are discontinuous values; and/or the presence of a gas in the gas,
the value of the rank indication in the second rank indication set is less than or equal to the value of the maximum rank indication, and the value of the maximum rank indication is determined from the first rank indication set according to the value of the virtual rank indication fed back by the terminal, or is determined from the first rank indication set based on traffic conditions.
16. The apparatus of any of claims 12 to 14, further comprising a transceiver, the processor further configured to: and notifying the terminal of the relevant information of the second rank indication set through a transceiver.
17. The apparatus according to claim 16, wherein the notifying the terminal of the information related to the second rank indication set specifically includes:
and notifying the terminal of the related information of the second rank indication set by sending physical layer signaling, high layer signaling or signaling triggered by the aperiodic Channel State Information (CSI).
18. The apparatus of claim 17, wherein the information related to the second rank indication set specifically includes: the value of all rank indications in the second rank indication set or the value of the maximum rank indication is determined from the first rank indication set according to the value of the virtual rank indication fed back by the terminal, or is determined from the first rank indication set based on traffic conditions, and the value of the rank indication in the second rank indication set is smaller than or equal to the value of the maximum rank indication.
19. The apparatus of claim 12, further comprising a transceiver, the processor further configured to:
receiving, by the transceiver, a value of a virtual rank indication fed back by a terminal, and determining a value of an actual rank indication according to the value of the virtual rank indication; or receiving a value of a virtual rank indication and a value of an actual rank indication fed back by the terminal;
and receiving CQI and PMI fed back by the terminal through the transceiver according to the value of the actual rank indication.
20. The apparatus of claim 19,
the value of the actual rank indication is a value of a rank indication in the set of rank indications that is not greater than the maximum value of the virtual rank indication; alternatively, the first and second electrodes may be,
the actual rank indication value is a rank indication value determined from the set of rank indications according to base station to terminal channel conditions and/or interference conditions.
21. A device for reporting channel state information, comprising:
a memory for storing program instructions;
a processor for calling the program instructions stored in the memory and executing according to the obtained program:
determining a second rank indication set;
determining an actual rank indication from the set of second rank indications;
determining channel state information according to the value of the actual rank indication;
feeding back a virtual rank indication and the channel state information on uplink channel resources; or, feeding back the virtual rank indication, the actual rank indication, and the channel state information;
wherein the set of rank indications is a second set of rank indications;
the processor is further configured to determine a first set of rank indications; the second set of rank indications is a subset of the first set of rank indications;
the virtual rank indication is determined from the set of first rank indications.
22. The apparatus of claim 21,
the value of the actual rank indication is a value of a rank indication in the set of rank indications that is not greater than the maximum value of the virtual rank indication; alternatively, the first and second electrodes may be,
the actual rank indication value is a rank indication value determined from the set of rank indications according to base station to terminal channel conditions and/or interference conditions.
23. A computer storage medium having computer-executable instructions stored thereon for causing a computer to perform the method of any one of claims 1 to 11.
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