CN109474320B - Method and device for resource allocation and channel state information reporting - Google Patents

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

Method and device for resource allocation and channel state information reporting

technical field

The present application relates to the field of communication technologies, and in particular, to a method and apparatus for resource allocation and channel state information reporting.

Background technique

The terminal calculates channel state information (Channel State Information, CSI) through downlink channel measurement. The CSI includes a channel quality indicator (CQI), a rank indicator (RI), a precoding matrix indicator (PMI), and may also include a channel state information reference signal (also referred to as a sounding reference signal) (Channel State Information Reference Signal, CSI). -RS) resource indicates CRI information. In order for the terminal to report the CSI to the base station for base station scheduling, 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 change dynamically with different RIs. In the LTE system, for the Class A codebook or the Advanced CSI codebook, the difference in CSI load caused by the difference in RI is not large, so the required uplink channel resources can be allocated according to the maximum possible CSI feedback overhead.

A Type I codebook and a Type II codebook are defined in the NR system. Table 1 and Table 2 provide the feedback information composition of the Type II codebook and the PMI feedback overhead when there are 32 ports. Assuming that the base station is configured with L=3 for the number of beam combinations of this codebook, the terminal may feed back RI=1 (using the rank 1 codebook) or RI=2 (using the rank 2 codebook) when performing CSI calculation. If the terminal determines RI=1, the total PMI is 192 bits, and if the terminal determines RI=2, the total PMI is 370 bits. This shows that the dynamic range of the PMI varies greatly, and the feedback of different RIs has a difference of 178 bits in overhead. Since the base station cannot know the CSI load size 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 this resource needs not only to ensure the accuracy of feedback, but also to ensure the rational use of uplink resources.

Table 1: PMI feedback overhead of 32-port Type II codebook (broadband part)

Table 2: PMI feedback overhead of 32-port Type II codebook (subband part)

To sum up, for the codebook defined by the NR system, the dynamic range of the load overhead is large, and if the uplink information resources are allocated according to the maximum overhead, it may lead to a large waste of resources. If the allocated uplink resources are small, the feedback accuracy cannot be guaranteed.

SUMMARY OF THE INVENTION

The embodiments of the present application provide a method and apparatus for resource allocation and channel state information reporting, so as to ensure the effective utilization of resources and the feedback accuracy of CSI.

On the network side, a resource allocation method provided by an embodiment of the present application includes:

determining a set of rank indications;

Uplink channel resources are allocated to the terminal according to the value of the rank indication in the rank indication set.

The resource allocation method provided in the embodiment of the present application allocates uplink channel resources to the terminal according to the value of the rank indication in the rank indication set, so as to ensure the effective utilization of resources and the feedback accuracy of CSI.

Optionally, the rank indication set is a second rank indication set;

The determining the rank indication set specifically includes:

determining a first rank indication set;

A second set of rank indications is determined from the first set of rank indications, wherein the second set of rank indications is a subset of the first set of rank indications.

Optionally, determining a second rank indication set according to the first rank indication set, specifically including:

Selecting a rank indication from the first rank indication set based on service conditions to generate a second rank indication set;

Alternatively, based on the value of the virtual rank indication fed back by the terminal, a rank indication is selected from the first rank indication set to generate a second rank indication set.

Optionally, the determining the first rank indication set specifically includes:

determining the first rank indication set according to at least one of the capability information, deployment scenario, and service conditions of the UE;

Alternatively, the first rank indication set is determined in a manner agreed with the terminal in advance.

Optionally, the values indicated by the ranks in the second rank indication set are discontinuous values; and/or,

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 based on the value of the virtual rank indication fed back by the terminal, from the first rank indication Determined is selected from the indication set, or selected from the first rank indication set based on service conditions.

Optionally, also include:

Notifying the terminal of relevant information of the second rank indication set.

Optionally, notifying the terminal of the relevant information of the second rank indication set specifically includes:

The relevant information of the second rank indication set is notified to the terminal by sending physical layer signaling, high layer signaling or signaling triggered by aperiodic channel state information CSI.

Optionally, the relevant information of 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, the value of the maximum rank indication is According to the value of the virtual rank indication fed back by the terminal, select and determine from the first rank indication set, or select and determine from the first rank indication set based on service conditions, and the second rank indication set The value indicated by the rank in is less than or equal to the value indicated by the maximum rank.

Optionally, also include:

receiving the value of the virtual rank indication fed back by the terminal, and determining the value of the actual rank indication according to the value of the virtual rank indication; or, receiving the value of the virtual rank indication and the value of the actual rank indication fed back by the terminal;

According to the value indicated by the actual rank, the CQI and PMI fed back by the terminal are received.

Optionally, the value of the actual rank indication is the value of the rank indication that is not greater than the maximum value of the virtual rank indication in the set of rank indications; or,

The value of the actual rank indication is the value of the rank indication determined from the set of rank indications according to channel conditions and/or interference conditions from the base station to the terminal.

Correspondingly, on the terminal side, a method for reporting channel state information provided by an embodiment of the present application includes:

determining a set of rank indications;

determining a virtual rank indication, and determining an actual rank indication from the set of rank indications;

Determine channel state information according to the value indicated by the actual rank;

On uplink channel resources, the virtual rank indication and the channel state information are fed back; or, the virtual rank indication, the actual rank indication, and the channel state information are fed back.

Optionally, the rank indication set is a second rank indication set;

The method also includes: determining a first rank indication set;

The virtual rank indication is determined from the first set of rank indications.

Optionally,

The value of the actual rank indication is the value of the rank indication that is not greater than the largest value of the virtual rank indication in the second rank indication set; or,

The value of the actual rank indication is the value of the rank indication determined from the second rank indication set according to channel conditions and/or interference conditions from the base station to the terminal.

On the network side, a resource allocation apparatus provided by this embodiment includes:

memory for storing program instructions;

The processor is used for calling the program instructions stored in the memory, and executes according to the obtained program:

determining a set of rank indications;

Uplink channel resources are allocated to the terminal according to the value of the rank indication in the rank indication set.

Optionally, the rank indication set is a second rank indication set;

The determining the rank indication set specifically includes:

determining a first rank indication set;

A second set of rank indications is determined from the first set of rank indications, wherein the second set of rank indications is a subset of the first set of rank indications.

Optionally, determining a second rank indication set according to the first rank indication set, specifically including:

Selecting a rank indication from the first rank indication set based on service conditions to generate a second rank indication set;

Alternatively, based on the value of the virtual rank indication fed back by the terminal, a rank indication is selected from the first rank indication set to generate a second rank indication set.

Optionally, the determining the first rank indication set specifically includes:

determining the first rank indication set according to at least one of the capability information, deployment scenario, and service conditions of the UE;

Alternatively, the first rank indication set is determined in a manner agreed with the terminal in advance.

Optionally, the values indicated by the ranks in the second rank indication set are discontinuous values; and/or,

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 based on the value of the virtual rank indication fed back by the terminal, from the first rank indication Determined is selected from the indication set, or selected from the first rank indication set based on service conditions.

Optionally, a transceiver is further included, and the processor is further configured to: notify the terminal of the relevant information of the second rank indication set through the transceiver.

Optionally, notifying the terminal of the relevant information of the second rank indication set specifically includes:

The relevant information of the second rank indication set is notified to the terminal by sending physical layer signaling, high layer signaling or signaling triggered by aperiodic channel state information CSI.

Optionally, the relevant information of the second rank indication set specifically includes: a value of all rank indications in the second rank indication set, or a value indicated by a maximum rank, where the value of the maximum rank indication is According to the value of the virtual rank indication fed back by the terminal, select and determine from the first rank indication set, or select and determine from the first rank indication set based on service conditions, and the second rank indication set The value indicated by the rank in is less than or equal to the value indicated by the maximum rank.

Optionally, a transceiver is also included, and the processor is further configured to:

Receive the value of the virtual rank indication fed back by the terminal through the transceiver, and determine the value of the actual rank indication according to the value of the virtual rank indication; or, receive the value of the virtual rank indication and the value of the actual rank indication fed back by the terminal;

According to the value indicated by the actual rank, the CQI and PMI fed back by the terminal are received through the transceiver.

Optionally, the value of the actual rank indication is the value of the rank indication that is not greater than the maximum value of the virtual rank indication in the set of rank indications; or,

The value of the actual rank indication is the value of the rank indication determined from the set of rank indications according to channel conditions and/or interference conditions from the base station to the terminal.

Correspondingly, on the terminal side, an apparatus for reporting channel state information provided by an embodiment of the present application includes:

memory for storing program instructions;

The processor is used for calling the program instructions stored in the memory, and executes according to the obtained program:

determining a second rank indication set;

determining an actual rank indication from the second set of rank indications;

Determine channel state information according to the value indicated by the actual rank;

On uplink channel resources, the virtual rank indication and the channel state information are fed back; or, the virtual rank indication, the actual rank indication, and the channel state information are fed back.

Optionally, the rank indication set is a second rank indication set;

The processor is further configured to: determine the first set of rank indications;

The virtual rank indication is determined from the first set of rank indications.

Optionally,

The value of the actual rank indication is the value of the rank indication that is not greater than the maximum value of the virtual rank indication in the set of rank indications; or,

The value of the actual rank indication is the value of the rank indication determined from the set of rank indications according to channel conditions and/or interference conditions from the base station to the terminal.

On the network side, the second resource allocation apparatus provided in the embodiment of the present application includes:

a determining unit for determining a rank indication set;

an allocation unit, configured to allocate uplink channel resources to the terminal according to the value of the rank indication in the rank indication set.

On the terminal side, the second channel state information reporting device provided by the embodiment of the present application includes:

a first unit, used to determine a rank indication set;

a second unit, configured to determine a virtual rank indication, and determine an actual rank indication from the set of rank indications;

a third unit, configured to determine channel state information according to the value indicated by the actual rank;

The fourth unit is configured to feed back the virtual rank indication and the channel state information on the uplink channel resource; or, feed back the virtual rank indication, the actual rank indication, and the channel state information.

A computer storage medium provided by an embodiment of the present application stores computer-executable instructions, where the computer-executable instructions are used to cause the computer to execute any one of the methods provided by the embodiments of the present application.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present application more clearly, the following briefly introduces the drawings used in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without any creative effort.

FIG. 1 is a schematic diagram of CSI information (excluding CRI) fed back by a terminal according to an embodiment of the present application;

FIG. 2 is a schematic diagram of another CSI information (excluding CRI) fed back by a terminal provided by an embodiment of the present application;

3 is a schematic flowchart of a resource allocation method provided by an embodiment of the present application;

4 is a schematic flowchart 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 provided by an embodiment of the present application;

6 is a schematic structural diagram of an apparatus for reporting channel state information provided by an embodiment of the present application;

FIG. 7 is a schematic structural diagram of another resource allocation apparatus provided by an embodiment of the present application;

FIG. 8 is a schematic structural diagram of another apparatus for reporting channel state information according to an embodiment of the present application.

Detailed ways

The embodiments of the present application provide a method and apparatus for resource allocation and channel state information reporting, so as to ensure the effective utilization of resources and the feedback accuracy of CSI.

In the MIMO system, when the terminal reports CSI information, the load overhead changes dynamically. In view of dynamically changing load overhead, the base station needs to allocate uplink resources reasonably to achieve effective utilization of resources.

Aiming at the problem that the feedback dynamic range of the Type II codebook is large in the NR system, the embodiments of the present application propose an uplink channel resource allocation method and a CSI feedback scheme.

An example of the specific processing flow is as follows:

Step 1: The base station determines the Rank Indicator (RI) value set, which is recorded as the first RI set; the first RI set is an invariant set or a semi-static change set; the number of elements in the first RI set can be 1 or greater than 1.

Alt-1: The base station determines the first RI set according to the UE's capability information, deployment scenario, service conditions, etc., and sends it to the terminal through physical layer signaling or high-level signaling; the high-level signaling here is similar to CSR signaling. For example, the capability reporting information of the UE shows that the UE supports 2-stream transmission at most, then the first RI set can be {1, 2}; for another example, if the base station wants the terminal to report single-stream CSI to better support MU-MIMO transmission, then the first RI set can be {1, 2}; An RI set may be {1}.

Alt-2: The base station and the terminal determine the available first RI set in an agreed manner, for example, as agreed in the protocol, the first RI set is {1, 2, .

Step 2: The base station selects one or more RI values from the first RI set to form a second RI set, where the second RI set is a subset of the first RI set. The method of base station selection is for example:

Selection based on service conditions: For example, the first RI set is {1, 2, 3, 4}, and the base station decides to increase the ratio of multi-user scheduling according to service changes, such as an increase in system load, so that the terminal is expected to feed back channels with low rank state information, the second RI set can be selected as {1,2};

Reporting based on terminal feedback: For example, the first RI set is {1, 2, 3, 4}, and the virtual RI value reported by the terminal within a period of time (or the last reported virtual RI value) is 1, then the base station expects the terminal to be in In the future, the low-rank channel information will also be reported, and the base station may determine the second RI set as {1, 2}. The base station uses the virtual RI reported by the terminal last time as a reference to determine the second RI set; according to the RI value in the second RI set, it allocates uplink channel resources to the terminal, so as to further ensure the effective use of uplink channel resources, and also The accuracy of the CSI feedback can be further guaranteed.

The RI values in the second RI set may be discontinuous, for example, the first RI set may be {1, 2, 3, 4}, and the second RI set may be {1, 3}.

The second RI set may be composed of all RI values that are 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}. The content previously fed back by the terminal determines that the maximum RI value is 2, and the second RI set is {1, 2}.

Step 3: The base station notifies the terminal of the information related to the second RI set. Specific methods such as:

Manner 1: The base station notifies the terminal of all RI values in the second RI set. For example, if the second RI set is {1, 3}, the base station sends both values to the terminal;

Mode 2: The base station notifies the terminal of the maximum RI value, and the RI values in the first set less than or equal to the maximum RI value constitute the second set. For example, the first set of RI values is {1, 2, 3, 4}. The content of the feedback determines that the maximum RI value is 2, and 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 uses the virtual RI reported by the terminal last time as a reference to determine the second RI set; according to the RI value in the second RI set, it allocates uplink channel resources to the terminal, so as to further ensure the effective use of uplink channel resources, and also The accuracy of the CSI feedback can be further guaranteed. It should be noted that the virtual RI value described in the embodiments of this application is relative to the actual RI value and has no special meaning, but is only an RI value in the first RI set, and the RI value is related to the UE The actual RI value used is differentiated.

For example, the base station may send physical layer signaling or high layer signaling, or send aperiodic CSI-triggered signaling, and may carry information about the second RI set therein. If the amount of resources required for aperiodic CSI reporting is related to the RI value fed back by the terminal, the resources allocated by the base station to the terminal may be allocated according to the maximum RI value in the second RI set.

Step 4: The terminal receives the signaling sent by the base station, and determines the first RI set and the second RI set.

Step 5: The terminal calculates the channel state information:

The terminal selects a virtual RI value from the first RI set according to the channel conditions and interference conditions from the base station to the terminal. The specific selection method can adopt the method of selecting RI in the prior art. The virtual RI value represents the channel from the base station to the terminal that can support The number of data streams transmitted in parallel;

Step 6: The terminal determines the actual RI value:

Alt-1: The actual RI value is the largest RI value in the second RI set that is not greater than the virtual RI value.

Alt-2: The actual RI value is the optimal RI value calculated and determined by the terminal from the second RI set according to the channel conditions and interference conditions from the base station to the terminal.

Step 7: The terminal calculates CQI, PMI, etc. (may also include CRI) according to the actual RI value and the channel conditions and interference conditions from the base station to the terminal. For example, for Alt-1, the first RI set is {1,2}, the second RI set is {1}, the virtual RI value selected by the terminal is 2, and the actual RI is 1. That is, the terminal calculates the CQI and the PMI according to RI=1, and the PMI calculated by the terminal only corresponds to the precoding matrix of one data stream. The resources for uplink CSI feedback are allocated according to the largest RI value (1) in the second RI set, so the CQI and PMI calculated by the terminal according to RI=1 can be transmitted within the allocated resources. 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 the CQI and the PMI according to RI=2, and the PMI calculated by the terminal corresponds to the precoding matrix of the two data streams. The resources for uplink CSI feedback are 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 within the allocated resources.

For Alt-1, the terminal feeds back a virtual RI value, and information such as CQI and PMI, as shown in FIG. 1 . The number of bits 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, and CQI and PMI, as shown in FIG. 2 . The number of bits 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 number of bits 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 8:

For Alt-1, the base station receives the virtual RI value fed back by the terminal, and determines the actual RI value according to the virtual RI value, where the actual RI value is the largest RI value in the second RI set that is not greater than the virtual RI value.

For Alt-2, the base station receives the virtual RI value and the actual RI value fed back by the terminal.

The base station receives information such as CQI and PMI fed back by the terminal according to the actual RI value. It includes determining the number of bits of information such as CQI and PMI fed back by the terminal according to the actual RI value, and receiving.

Examples of specific embodiments are given below.

Example 1:

It is assumed that the base station is configured with a 32-port Type II codebook, the codebook parameter L=3, and the number of feedback subbands is 10. The system predefined RI overhead is 3 bits. When the rank (rank) = 1 to 4, there is only one code word (code word), and at this time, the CQI of each subband is 4 bits. Assume that when RI=3, the overhead of PMI is 548 bits; when RI=4, the overhead of PMI is 726 bits. Assuming that there are more than one RI value allowed in the CSR constraint information, in this case, the CSI information fed back by the terminal includes two RIs.

Base station side:

The protocol stipulates that the first RI set is {1, 2, 3, 4} and remains unchanged.

The base station determines that the second RI set is {1, 2}. The base station determines to allocate uplink channel resources with RI=2. From Table 1, the PMI load overhead of RI=2 is 370 bits. Considering that the RI overhead is 3 bits and the CQI overhead of 10 subbands is 40 bits, the CSI overhead corresponding to RI=2 is RI+PMI+CQI=3+370+40=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 may be sent through CSR information). And the uplink channel resources are allocated according to the resources occupied by the 413-bit information.

The base station receives the CSI information fed back by the terminal. This information is decoded to obtain PMI and CQI fed back by the terminal, as well as actual RI=2 and virtual RI=3.

The base station combines actual RI=2, PMI and CQI for scheduling.

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. According to the aforementioned assumption, the PMI load overhead of RI=3 is 548 bits. Considering that the RI overhead is 3 bits and the CQI overhead of 10 subbands is 40 bits, the CSI overhead corresponding to RI=3 is RI+PMI+CQI=3+548+40=591 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 may be sent through CSR information). And the uplink channel resources are allocated according to the resources occupied by the 591-bit information.

The base station receives the CSI information fed back by the terminal. This information is decoded to obtain the PMI and CQI fed back by the terminal, as well as actual RI=3 and virtual RI=4.

The base station combines actual RI=3, PMI and CQI for scheduling. The second RI set is determined to be {1, 2, 3, 4}.

Terminal side:

The terminal receives the information of the second RI set sent by the base station, and according to the agreement, determines that the first RI set is {1, 2, 3, 4} and the second RI set is {1, 2}.

The terminal calculates virtual RI=3 from the first RI set {1, 2, 3, 4} according to channel measurement.

The terminal calculates the actual RI=2 from the second RI set {1, 2} according to the channel measurement. And calculate the PMI\CQI information corresponding to the actual RI information.

The terminal combines the actual RI=2 and its corresponding PMI\CQI information, and the virtual RI=3 to form the CSI information. The CSI information is fed back on the uplink channel resources allocated by the base station according to the 413-bit information.

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 virtual RI=4 from the first RI set {1, 2, 3, 4} according to channel measurement.

The terminal calculates the actual RI=3 from the second RI set {1, 2, 3} according to the channel measurement. And calculate the PMI\CQI information corresponding to the actual RI information.

The terminal combines the actual RI=3 and its corresponding PMI\CQI information, and the virtual RI=4 to form the CSI information. The CSI information is fed back on the uplink channel resources allocated by the base station according to the 591-bit information.

Embodiment 2:

The first RI set is {1,2}. The second RI set is {1} when the n-th trigger is triggered, the virtual RI value selected by the terminal is 2, and the actual RI is 1. That is, the terminal calculates the CQI and the PMI according to RI=1, and the PMI calculated by the terminal only corresponds to the precoding matrix of one data stream. The resources for uplink CSI feedback are allocated according to the largest RI value (1) in the second RI set, so the CQI and PMI calculated by the terminal according to RI=1 can be transmitted within the allocated resources.

Since the virtual RI value reported by the terminal is 2, it means that the channel from the base station to the terminal can support 2-stream transmission, and the base station can set the second set to be {1,2} in the n+1th trigger, that is, the terminal can feed back at most two PMI and CQI of the data stream. The base station allocates resources for uplink feedback according to the amount of data fed back by the two data streams. Because the base station still chooses a virtual RI value of 2 with a high probability, the actual RI value is also 2, which fully utilizes the uplink resources.

Embodiment three:

The first RI set is {1,2}. The second RI set is {1, 2} when the nth trigger is triggered, the virtual RI value selected by the terminal is 1, and the actual RI is 1. That is, the terminal calculates the CQI and the PMI according to RI=1, and the PMI calculated by the terminal only corresponds to the precoding matrix of one data stream. The resources for uplink CSI feedback are allocated according to the largest 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 resources, and there is a certain waste of resources.

Since the virtual RI value reported by the terminal is 1, it means that the channel from the base station to the terminal can only support 1 stream transmission, and the base station can set the second set to be {1} in the n+1th trigger, that is, the terminal can only feed back 1 stream at most. PMI and CQI of the data stream. The base station allocates resources for uplink feedback according to the amount of data fed back by one data stream. Because the base station still chooses a virtual RI value of 1 with a relatively large probability, the actual RI value is also 1, reducing waste of resources.

In the above embodiments, the base station as a network side device performs resource allocation as an example for description. Of course, other network entities may also perform the resource allocation methods described in the embodiments of the present application.

It can be seen that, on the network side, referring to FIG. 3 , a resource allocation method provided by an embodiment of the present application includes:

S101. Determine a rank indication set;

S102. Allocate uplink channel resources for the terminal according to the value of the rank indication in the rank indication set.

It should be noted that, in this embodiment of the present application, only one rank indication set may be determined, and uplink channel resources are allocated to the terminal according to the value of the rank indication in the rank indication set. Multiple rank indication sets may also be determined, and uplink channel resources may be allocated to the terminal according to the value of the rank indication in one of the multiple rank indication sets.

Optionally, the rank indication set is a second rank indication set, such as the above-mentioned second RI set;

The determining the rank indication set specifically includes:

determining a first rank indication set, such as the above-mentioned first RI set;

A second set of rank indications is determined from the first set of rank indications, wherein the second set of rank indications is a subset of the first set of rank indications.

Optionally, determining a second rank indication set according to the first rank indication set, specifically including:

Selecting a rank indication from the first rank indication set based on service conditions to generate a second rank indication set;

Alternatively, based on the value of the virtual rank indication fed back by the terminal, a rank indication is selected from the first rank indication set to generate a second rank indication set. Thus, the uplink channel resources allocated for the terminal can be further utilized.

Optionally, the determining the first rank indication set specifically includes:

determining the first rank indication set according to at least one of the capability information, deployment scenario, and service conditions of the UE;

Alternatively, the first rank indication set is determined in a manner agreed with the terminal in advance.

Optionally, the values indicated by the ranks in the second rank indication set are discontinuous values; and/or,

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 based on the value of the virtual rank indication fed back by the terminal, from the first rank indication Determined is selected from the indication set, or selected from the first rank indication set based on service conditions.

Optionally, also include:

Notifying the terminal of relevant information of the second rank indication set.

Optionally, notifying the terminal of the relevant information of the second rank indication set specifically includes:

The relevant information of the second rank indication set is notified to the terminal by sending physical layer signaling, high layer signaling or signaling triggered by aperiodic channel state information CSI.

Optionally, the relevant information of the second rank indication set specifically includes: a value of all rank indications in the second rank indication set, or a value indicated by a maximum rank, where the value of the maximum rank indication is According to the value of the virtual rank indication fed back by the terminal, select and determine from the first rank indication set, or select and determine from the first rank indication set based on service conditions, and the second rank indication set The value indicated by the rank in is less than or equal to the value indicated by the maximum rank.

Optionally, also include:

receiving the value of the virtual rank indication fed back by the terminal, and determining the value of the actual rank indication according to the value of the virtual rank indication; or, receiving the value of the virtual rank indication and the value of the actual rank indication fed back by the terminal;

According to the value indicated by the actual rank, the CQI and PMI fed back by the terminal are received, that is, the CSI fed back by the terminal.

Optionally, the value of the actual rank indication is the value of the rank indication that is not greater than the maximum value of the virtual rank indication in the set of rank indications; or,

The value of the actual rank indication is the value of the rank indication determined from the set of rank indications according to channel conditions and/or interference conditions from the base station to the terminal.

Correspondingly, on the terminal side, referring to FIG. 4 , a method for reporting channel state information provided by an embodiment of the present application includes:

S201. Determine a rank indication set;

S202. Determine a virtual rank indication, and determine an actual rank indication from the set of rank indications;

S203. Determine channel state information according to the value indicated by the actual rank;

S204. Feed back the virtual rank indication and the channel state information on the uplink channel resource; or feed back the virtual rank indication, the actual rank indication, and the channel state information.

Optionally, the rank indication set is a second rank indication set;

The method also includes: determining a first rank indication set;

The virtual rank indication is determined from the first set of 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 the next uplink channel resource allocation based on the virtual rank, that is, determine a new second rank indication set according to the virtual rank indication, and perform the uplink channel according to the second rank indication set. Resource allocation.

Optionally,

The value of the actual rank indication is the value of the rank indication that is not greater than the largest value of the virtual rank indication in the second rank indication set; or,

The value of the actual rank indication is a value of the rank indication determined from the second set of rank indications according to channel conditions and/or interference conditions from the base station to the terminal.

The apparatuses provided by the embodiments of the present application are described below.

On the network side, referring to FIG. 5 , a resource allocation apparatus provided in this embodiment includes:

a memory 520 for storing program instructions;

The processor 500 is configured to call the program instructions stored in the memory, and execute according to the obtained program:

determining a set of rank indications;

Uplink channel resources are allocated to the terminal according to the value of the rank indication in the rank indication set.

Optionally, the rank indication set is a second rank indication set;

The determining the rank indication set specifically includes:

determining a first rank indication set;

A second set of rank indications is determined from the first set of rank indications, wherein the second set of rank indications is a subset of the first set of rank indications.

Optionally, determining a second rank indication set according to the first rank indication set, specifically including:

Selecting a rank indication from the first rank indication set based on service conditions to generate a second rank indication set;

Alternatively, based on the value of the virtual rank indication fed back by the terminal, a rank indication is selected from the first rank indication set to generate a second rank indication set.

Optionally, the determining the first rank indication set specifically includes:

determining the first rank indication set according to at least one of the capability information, deployment scenario, and service conditions of the UE;

Alternatively, the first rank indication set is determined in a manner agreed with the terminal in advance.

Optionally, the values indicated by the ranks in the second rank indication set are discontinuous values; and/or,

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 based on the value of the virtual rank indication fed back by the terminal, from the first rank indication Determined is selected from the indication set, or selected from the first rank indication set based on service conditions.

Optionally, a transceiver 510 is further included, and the processor is further configured to: notify the terminal of the relevant information of the second rank indication set through the transceiver.

Optionally, notifying the terminal of the relevant information of the second rank indication set specifically includes:

The relevant information of the second rank indication set is notified to the terminal by sending physical layer signaling, high layer signaling or signaling triggered by aperiodic channel state information CSI.

Optionally, the relevant information of the second rank indication set specifically includes: a value of all rank indications in the second rank indication set, or a value indicated by a maximum rank, where the value of the maximum rank indication is According to the value of the virtual rank indication fed back by the terminal, select and determine from the first rank indication set, or select and determine from the first rank indication set based on service conditions, and the second rank indication set The value indicated by the rank in is less than or equal to the value indicated by the maximum rank.

Optionally, a transceiver is also included, and the processor is further configured to:

Receive the value of the virtual rank indication fed back by the terminal through the transceiver, and determine the value of the actual rank indication according to the value of the virtual rank indication; or, receive the value of the virtual rank indication and the value of the actual rank indication fed back by the terminal;

According to the value indicated by the actual rank, the CQI and PMI fed back by the terminal are received through the transceiver.

The transceiver 510 is used for receiving and transmitting data under the control of the processor 500 .

5, the bus architecture may include any number of interconnected buses and bridges, specifically one or more processors represented by processor 500 and various circuits of memory represented by memory 520 are linked together. The bus architecture may also link together various other circuits, such as peripherals, voltage regulators, and power management circuits, which are well known in the art and therefore will not be described further herein. The bus interface provides the interface. Transceiver 510 may be a number of elements, including a transmitter and a transceiver, providing a means for communicating with various other devices 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 processor (CPU), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or a complex programmable logic device (Complex Programmable Logic Device, CPLD).

Correspondingly, on the terminal side, referring to FIG. 6 , an apparatus for reporting channel state information provided by an embodiment of the present application includes:

a memory 620 for storing program instructions;

The processor 600 is configured to call the program instructions stored in the memory, and execute according to the obtained program:

determining a set of rank indications;

determining a virtual rank indication, and determining an actual rank indication from the set of rank indications;

Determine channel state information according to the value indicated by the actual rank;

On uplink channel resources, the virtual rank indication and the channel state information are fed back through the transceiver 610; or, on the uplink channel resources, the virtual rank indication, the actual rank indication, and the channel state information.

Optionally, the rank indication set is a second rank indication set;

The processor is further configured to: determine the first set of rank indications;

The virtual rank indication is determined from the first set of rank indications.

Optionally,

The value of the actual rank indication is the value of the rank indication that is not greater than the largest value of the virtual rank indication in the second rank indication set; or,

The value of the actual rank indication is a value of the rank indication determined from the second set of rank indications according to channel conditions and/or interference conditions from the base station to the terminal.

The transceiver 610 is used for receiving and transmitting data under the control of the processor 600 .

6, the bus architecture may include any number of interconnected buses and bridges, specifically one or more processors represented by processor 600 and various circuits of memory represented by memory 620 are linked together. The bus architecture may also link together various other circuits, such as peripherals, voltage regulators, and power management circuits, which are well known in the art and therefore will not be described further herein. The bus interface provides the interface. Transceiver 610 may be a number of elements, ie, including a transmitter and a receiver, that provide a means for communicating with various other devices over a transmission medium. For different user equipments, the user interface 630 may also be an interface capable of externally connecting the required equipment, and the connected equipment includes but is not limited to a keypad, a display, a speaker, a microphone, a joystick, and the like.

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.

Optionally, the processor 600 may be a CPU (central processor), an ASIC (Application Specific Integrated Circuit, application specific integrated circuit), an FPGA (Field-Programmable Gate Array, field programmable gate array) or a CPLD (Complex Programmable Logic Device, complex programmable logic devices).

On the network side, referring to FIG. 7 , the second resource allocation apparatus provided by this embodiment of the present application includes:

a determining unit 11, configured to determine a rank indication set;

The allocation 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.

On the terminal side, referring to FIG. 8 , the second channel state information reporting device provided by the embodiment of the present application 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 indicated by the actual rank;

The fourth unit 24 is configured to feed back the virtual rank indication and the channel state information on the uplink channel resource; or, feed back the virtual rank indication, the actual rank indication, and the channel state information.

A computer storage medium provided by an embodiment of the present application stores computer-executable instructions, where the computer-executable instructions are used to cause the computer to execute any one of the methods provided by the embodiments of the present application. The computer storage medium can be any available medium or data storage device that can be accessed by a computer, including but not limited to magnetic storage (eg, floppy disk, hard disk, magnetic tape, magneto-optical disk (MO), etc.), optical storage (eg CD, DVD, BD, HVD, etc.), and semiconductor memory (eg, ROM, EPROM, EEPROM, non-volatile memory (NAND FLASH), solid-state disk (SSD)), and the like.

The methods provided in the embodiments of the present application may be applied to terminal devices, and may also be applied to network devices.

The terminal equipment may also be referred to as user equipment (User Equipment, referred to as "UE"), mobile station (Mobile Station, referred to as "MS"), mobile terminal (Mobile Terminal), etc. Optionally, the terminal may be Have the ability to communicate with one or more core networks via a Radio Access Network (RAN), for example, the terminal may be a mobile phone (or a "cellular" phone), or a computer with a mobile nature, etc., For example, the terminal may also be a portable, pocket-sized, hand-held, computer-built, or vehicle-mounted mobile device.

A network device, which may be a base station (eg, an access point), refers to a device in an access network that communicates with wireless terminals over an air interface through one or more sectors. The base station may be used to convert received air frames to and from IP packets, acting 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 attribute management of the air interface. For example, the base station may be a base station (BTS, BaseTransceiver Station) in GSM or CDMA, a base station (NodeB) in WCDMA, or an evolved base station (NodeB or eNB or e-NodeB, evolutional Node B) in LTE ), which is not limited in the embodiments of this aspect.

The processing flow of the above method can be implemented by a software program, and the software program can be stored in a storage medium, and when the stored software program is called, the steps in any of the above methods are executed.

To sum up, in the technical solutions provided by the embodiments of the present application, the base station allocates uplink channel resources to the terminal according to the RI value in the second RI set; the terminal determines the actual RI value from the second RI set, and Calculate the PMI\CQI information corresponding to the actual RI. At the same time, the terminal feeds back the virtual RI value calculated from the first RI set; the terminal feeds back the virtual RI, or the virtual RI+actual RI; 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. If the uplink information resources are allocated according to the maximum overhead, it may lead to a large waste of resources; if the allocated uplink resources are small , the accuracy of the feedback cannot be guaranteed. The embodiments of the present application can simultaneously ensure feedback accuracy and effective utilization of resources.

As will be appreciated by those skilled in the art, the embodiments of the present application may be provided as a method, a system, or a 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 having computer-usable program code embodied therein, including but not limited to disk storage, optical storage, and the like.

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 present application. It will be understood that each flow and/or block in the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to the processor of a general purpose computer, special purpose computer, embedded processor or other programmable data processing device to produce a machine such that the instructions executed by the processor of the computer or other programmable data processing device produce Means for implementing the functions specified in a flow or flow of a flowchart and/or a block or blocks of a block diagram.

These computer program instructions may also be stored in a computer readable memory capable of directing a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer readable memory result in an article of manufacture comprising instruction means, the instructions The apparatus implements the functions specified in the flow or flow of the flowcharts and/or the block or blocks of the block diagrams.

These computer program instructions can also be loaded on 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 provide steps for implementing the functions specified in the flow or blocks of the flowcharts and/or the block or blocks of the block diagrams.

Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these 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 also intended to include these modifications and variations.

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; or,

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; or,

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; or,

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; or,

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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