CN107276732B

CN107276732B - A kind of resource determining method and device

Info

Publication number: CN107276732B
Application number: CN201610214097.5A
Authority: CN
Inventors: 胡乐薇; 王锐
Original assignee: Datang Mobile Communications Equipment Co Ltd
Current assignee: Datang Mobile Communications Equipment Co Ltd
Priority date: 2016-04-07
Filing date: 2016-04-07
Publication date: 2019-11-19
Anticipated expiration: 2036-04-07
Also published as: CN107276732A

Abstract

The invention discloses a kind of resource determining method and devices to improve the spectrum efficiency and handling capacity of system more accurately to select optimal frequency domain resource for UE.This method comprises: being determined as subband shared by the PRB of UE predistribution；The PRB on the subband being UE predistribution is grouped, determines the summation of the PRB quantity in each group of corresponding CQI value and each group；According to the summation of the PRB quantity in each group of corresponding CQI value and each group, the scheduling resource of the UE is determined.

Description

Resource determination method and device

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a resource determination method and apparatus.

Background

In a Long Term Evolution (LTE) wireless communication network, a protocol specifies that a User Equipment (UE) can report a wideband Quality Indicator (CQI) or a sub-band CQI. The network side determines a Modulation and Coding Scheme (MCS) in the next scheduling according to the CQI information reported by the UE.

Generally, under the condition of non-frequency selection, a system schedules the UE by using a broadband CQI reported by the UE; under the frequency selection condition, the system combines the sub-Band CQI reported by the UE to schedule the UE, and when the number of sub-Bands (BP) occupied by resources required to be allocated by the UE is more than one and the respective CQI values of the plurality of BP are not equal, the CQI values of the sub-bands are averaged and called according to the proportion of Physical Resource Blocks (PRBs). Such a processing method may increase or decrease CQI, so that MCS cannot reflect current channel environment, and spectrum efficiency and throughput of the system are affected.

In summary, the existing resource determination method cannot accurately select the optimal frequency domain resource for the UE, which reduces the spectrum efficiency and throughput of the system.

Disclosure of Invention

The embodiment of the invention provides a resource determination method and a resource determination device, which are used for more accurately selecting optimal frequency domain resources for UE (user equipment) and improving the spectral efficiency and the throughput of a system.

The resource determining method provided by the embodiment of the invention comprises the following steps:

determining a sub-band occupied by PRB pre-allocated for the UE;

grouping the PRBs pre-allocated to the UE on the subbands, and determining a CQI value corresponding to each group and the sum of the number of PRBs in each group;

and determining the scheduling resource of the UE according to the CQI value corresponding to each group and the sum of the PRB number in each group.

The method provided by the embodiment of the invention groups the PRBs pre-allocated for the UE on the sub-bands after determining the sub-bands occupied by the PRBs pre-allocated for the UE, and then determines the scheduling resources of the UE according to the CQI value corresponding to each group and the sum of the number of the PRBs in each group, so that the optimal frequency domain resources can be more accurately selected for the UE, and the spectral efficiency and the throughput of the system are improved.

Preferably, the PRBs are grouped as follows:

and sequencing the subbands according to the sequence of the CQI value of each subband corresponding to the UE from small to large, and dividing the PRBs pre-allocated to the UE on the ith ordered subband to the PRBs pre-allocated to the UE on the Mth subband into the ith group, wherein i belongs to { 1.. multidot.M }, and M represents the total number of the subbands pre-allocated to the UE.

Preferably, for each group, the corresponding CQI value for that group is determined as follows:

and selecting the lowest CQI value from the CQI values corresponding to each subband occupied by the PRB in the group and the UE, and determining the lowest CQI value as the CQI value corresponding to the group.

Preferably, determining the scheduling resource of the UE according to the CQI value corresponding to each group and the sum of the number of PRBs in each group specifically includes:

and aiming at each group, determining the effectiveness corresponding to the CQI value corresponding to the group, and determining the scheduling resource of the UE according to the product of the effectiveness corresponding to the CQI value corresponding to the group and the sum of the PRBs in the group.

Preferably, for each group, determining the scheduling resource of the UE according to a product of the efficiency corresponding to the CQI value corresponding to the group and a sum of the PRBs in the group includes:

aiming at each group, calculating the product value of the efficiency corresponding to the CQI value corresponding to the group and the sum of the PRBs in the group;

and determining a group corresponding to the maximum product value, and determining the CQI value corresponding to the group and the PRB in the group as the scheduling resource of the UE.

For each divided group, the product value of the efficiency corresponding to the CQI value corresponding to the group and the sum of the number of PRBs in the group is calculated, so that the throughput of the system corresponding to the UE when the resource of the group is used for scheduling the UE can be represented. Therefore, the calculated product value corresponding to each group is compared, the group corresponding to the maximum product value is finally selected, the CQI value corresponding to the group and the PRB in the group are determined as the scheduling resource of the UE, so that the optimal frequency domain resource is more accurately selected for the UE, the MCS which best meets the current channel environment can be determined by adopting the CQI value corresponding to the group to transmit data, and the spectrum efficiency and the throughput of the system are improved to the maximum extent.

The resource determining apparatus provided by the embodiment of the present invention includes:

a first unit, configured to determine a subband occupied by a PRB pre-allocated for a UE;

a second unit, configured to group PRBs pre-allocated to the UE on the subband, and determine a CQI value corresponding to each group and a sum of the number of PRBs in each group;

and a third unit, configured to determine scheduling resources of the UE according to the CQI value corresponding to each group and a sum of the number of PRBs in each group.

The device provided by the embodiment of the invention groups the PRBs pre-allocated for the UE on the sub-bands after determining the sub-bands occupied by the PRBs pre-allocated for the UE, and then determines the scheduling resources of the UE according to the CQI value corresponding to each group and the sum of the number of the PRBs in each group, so that the optimal frequency domain resources can be more accurately selected for the UE, and the spectral efficiency and the throughput of the system are improved.

Preferably, the second unit groups the PRBs as follows:

Preferably, the second unit determines, for each group, a CQI value corresponding to the group as follows:

Preferably, when determining the scheduling resource of the UE according to the CQI value corresponding to each group and the sum of the number of PRBs in each group, the third unit is specifically configured to:

Preferably, for each group, when determining the scheduling resource of the UE according to a product of the efficiency corresponding to the CQI value corresponding to the group and a sum of the number of PRBs in the group, the third unit is specifically configured to:

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 embodiments will be briefly described 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 without creative efforts.

Fig. 1 is a schematic flowchart of a resource determination method according to an embodiment of the present invention;

fig. 2a is a schematic diagram illustrating a subband sorting result obtained by sorting subbands occupied by PRBs pre-allocated to a UE according to an embodiment of the present invention;

fig. 2b is a schematic diagram of frequency domain resources respectively corresponding to the 1 st group of PRBs and the 2 nd group of PRBs in the embodiment of the present invention;

fig. 2c is a schematic diagram of frequency domain resources corresponding to the 2 nd group of PRBs and the 3 rd group of PRBs, respectively, in an implementation of the present invention;

FIG. 2d is a schematic diagram of frequency domain resources finally determined in the implementation of the present invention;

fig. 3 is a schematic structural diagram of a resource determining apparatus according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1, a resource determining method provided in the embodiment of the present invention includes:

s101, determining a sub-band occupied by PRB pre-allocated for UE;

s102, grouping PRBs pre-allocated to the UE on the subbands, and determining a CQI value corresponding to each group and the sum of the number of PRBs in each group;

here, the PRBs pre-allocated to the UE are grouped. Therefore, the resources used for scheduling the UE can be divided into a plurality of groups, and finally, an optimal group of resources and the CQI corresponding to the group of resources are selected from the divided plurality of groups of resources to schedule the UE. Specific grouping methods will be set forth in detail below.

S103, determining the scheduling resource of the UE according to the CQI value corresponding to each group and the sum of the PRB number in each group.

Preferably, before step S101, the method further includes: and receiving the CQI value of each sub-band reported by the UE. Thus, a CQI value per UE on each subband may be derived. Of course, before step S101, the wideband CQI value reported by the UE may also be received.

Preferably, after the CQI value of each UE on each subband is obtained, the CQI value of each subband corresponding to the UE is modified. The specific modification process may adopt the prior art, and the embodiment of the present invention is not described herein again.

After receiving the CQI reported by the UE, for each UE, pre-allocating PRBs to the UE according to the data amount that the UE needs to transmit and the CQI value of each sub-band corresponding to the UE (or the wideband CQI value corresponding to the UE). For example, PRBs may be pre-allocated to the UE as follows:

the first method is as follows: if the frequency selection function is started, the BP with the highest CQI value corresponding to the UE can be selected, and then the PRB is allocated to the UE on the BP with the highest CQI value corresponding to the UE, and if the number of subbands occupied by the PRB required to be allocated to the UE is greater than one, the PRB is sequentially allocated to the UE on the BP with the next highest CQI value corresponding to the UE.

The second method comprises the following steps: and if the frequency selection function is not started, allocating PRBs to the UE according to the current PRB use sequence.

After the resource pre-allocation of each UE is completed, the subband occupied by the PRB pre-allocated to each UE may be determined, that is, which BPs are occupied by the PRB allocated to the UE, and for each BP, several PRBs are allocated to the UE on the BP.

Preferably, the PRBs pre-allocated for the UE are grouped as follows:

sequencing each subband occupied by PRB pre-allocated to the UE according to the sequence of the CQI value of each subband corresponding to the UE from small to large, and dividing the PRB pre-allocated to the UE on the ith ordered subband to the Mth subband into the ith group, wherein i belongs to { 1.,. M }, and M represents the total number of the subbands occupied by the PRB pre-allocated to the UE.

Unless otherwise specified, each subband corresponding to a UE mentioned herein and below refers to each subband occupied by PRBs pre-allocated to the UE.

In addition, here and below, the CQI value of each sub-band corresponding to the UE preferably refers to a modified CQI value.

Preferably, for each of the above-mentioned divided groups, the corresponding CQI value of the group is determined as follows:

Examples are as follows:

assume that a PRB pre-allocated for the UE occupies four Subbands (BPs), where M is 4. And aiming at the four sub-bands, sequencing the four sub-bands according to the sequence of the CQI value of each sub-band corresponding to the UE from small to large, wherein the sequenced sub-bands are numbered as BP1, BP2, BP3 and BP4 in sequence. Dividing the sorted PRB pre-allocated for the UE on the 1 st sub-band to the PRB pre-allocated for the UE on the 4 th sub-band, namely the PRB pre-allocated for the UE on BP1, the PRB pre-allocated for the UE on BP2, the PRB pre-allocated for the UE on BP3 and the PRB pre-allocated for the UE on BP4 into a 1 st group; dividing the sorted PRB pre-allocated to the UE on the 2 nd subband to the PRB pre-allocated to the UE on the 4 th subband, namely the PRB pre-allocated to the UE on BP2, the PRB pre-allocated to the UE on BP3 and the PRB pre-allocated to the UE on BP4 into a 2 nd group; dividing the PRB pre-allocated for the UE on the 3 rd subband to the PRB pre-allocated for the UE on the 4 th subband after sequencing, namely the PRB pre-allocated for the UE on BP3 and the PRB pre-allocated for the UE on BP4 into a 3 rd group; and dividing the PRB pre-allocated to the UE on the 4 th subband after sequencing, namely the PRB pre-allocated to the UE on BP4, into a 4 th group. This can be expressed by the following equation:

wherein,represents the sum total of the number of PRBs in the divided ith group of PRBs,indicating the number of PRBs pre-allocated for the UE at the i-th BP after sorting, i ∈ { 1.

For the divided PRB of the 1 st group, the BP1 occupied by the PRB in the group is the lowest CQI value corresponding to the UE, so that the CQI value corresponding to the BP1 and the UE is the CQI value corresponding to the 1 st group; for the divided PRB group 2, the BP2 occupied by the PRB in the group is the lowest CQI value corresponding to the UE, so the CQI value corresponding to the BP2 and the UE is the CQI value corresponding to the group 2; for the 3 rd group of divided PRBs, the BP3 occupied by the PRBs in the group is the lowest CQI value corresponding to the UE, so that the CQI value corresponding to the BP3 and the UE is the CQI value corresponding to the 3 rd group; for the 4 th group of divided PRBs, since the subband occupied by the PRBs in the group only includes BP4, the CQI value corresponding to BP4 for the UE is the CQI value corresponding to the 4 th group. For the CQI corresponding to each set of PRBs, the following formula can be used:

wherein,indicating CQI values corresponding to the divided ith group of PRBs,and indicating the ordered ith BP and the CQI value corresponding to the UE, wherein i belongs to { 1.,. M }.

Thus, in the above example, there are four sets of resources available for scheduling the UE, and finally, according to step S103, one set of resources is selected from the four sets of resources for scheduling the UE.

Preferably, step S103 specifically includes:

and aiming at each group, determining the efficiency (efficiency) corresponding to the CQI value corresponding to the group, and determining the scheduling resource of the UE according to the product of the efficiency corresponding to the CQI value corresponding to the group and the sum of the PRBs in the group.

For each group, determining the efficiency corresponding to the CQI value corresponding to the group, and determining the efficiency through table lookup, that is, looking up the efficiency corresponding to the CQI value from a preset relation table corresponding to the CQI value and the efficiency, where each CQI value uniquely corresponds to one efficiency.

Here, for each divided group, a product value of the efficiency corresponding to the CQI value corresponding to the group and the total sum of the number of PRBs in the group is calculated, which may represent the throughput of the system corresponding to when the UE is scheduled by using the resources of the group. Therefore, the calculated product value corresponding to each group is compared, and finally the group corresponding to the maximum product value is selected, that is, the throughput of the system corresponding to the group corresponding to the maximum product value is maximum when the resource of the group corresponding to the maximum product value is adopted to schedule the UE, and the CQI value corresponding to the group and the PRB in the group are determined as the scheduling resource of the UE, so that the optimal frequency domain resource is more accurately selected, the MCS determined by the CQI value corresponding to the group can more accurately reflect the current channel environment, the PRB in the group is utilized to transmit data, and the spectrum efficiency and the throughput of the system can be improved to the maximum extent.

One specific example is given below.

Suppose that a PRB pre-allocated for a certain UE occupies three BPs, the BPs are ordered according to the descending order of the CQI value corresponding to each BP and the UE and are respectively BP [1], BP [2] and BP [3], as shown in FIG. 2 a.

Wherein, BP [1] and CQI value corresponding to the UE are 2, the number of PRBs pre-allocated for the UE on BP [1] is 6; BP2 and CQI value that this UE correspond to are 4, number of PRB that is pre-allocated for this UE on this BP2 is 24; BP [3] corresponds to the CQI value of 14 for the UE, and the number of PRBs pre-allocated for the UE on BP [3] is 10.

Dividing PRBs pre-allocated to the UE into 3 groups, wherein the PRBs pre-allocated to the UE on BP [1], the PRBs pre-allocated to the UE on BP [2] and the PRBs pre-allocated to the UE on BP [3] are divided into a 1 st group, the CQI value corresponding to the group is 2, the corresponding efficiency is 0.2344 when the CQI value is 2 through table lookup, and the sum of the number of the PRBs in the group is 40; dividing PRB pre-allocated for the UE on BP [2] and PRB pre-allocated for the UE on BP [3] into a 2 nd group, wherein the CQI value corresponding to the group is 4, the corresponding efficiency is 0.6016 when the CQI value is 4 through table look-up, and the sum of the number of PRBs in the group is 34; and dividing the PRBs pre-allocated to the UE on BP [3] into a 3 rd group, wherein the group corresponds to a CQI value of 14, the corresponding efficiency is 5.1152 when the CQI value is 14 can be obtained by table look-up, and the sum of the number of the PRBs in the group is 10.

Aiming at each divided 3 groups of PRBs, calculating the product value of the efficiency corresponding to the CQI value corresponding to the group and the sum of the number of PRBs in the group.

In this embodiment, the product value corresponding to a group with the lowest CQI value is compared with a group with a higher CQI value, and an elimination mechanism is used until all groups are compared, which includes the following specific steps:

judging for the first time: the resources corresponding to the 1 st group and the 2 nd group are shown in fig. 2 b.

Calculating the product value of the efficiency corresponding to the CQI value corresponding to the 1 st group and the sum of the PRBs in the group: 0.2344 × 40 ═ 9.376; calculating the product value of the efficiency corresponding to the CQI value corresponding to the 2 nd group and the sum of the PRBs in the group: 0.6016 x 34-20.45. Since 9.376 is less than 20.45, that is, the throughput of the system corresponding to the scheduling of the UE using the group 1 resource is less than the throughput of the system corresponding to the scheduling of the UE using the group 2 resource, the UE is scheduled without considering the selection of the group 1 resource. Continuing to judge the next step:

and (4) judging for the second time: the resources corresponding to the 2 nd group and the 3 rd group are shown in fig. 2 c.

Calculating the product value of the efficiency corresponding to the CQI value corresponding to the 3 rd group and the sum of the PRBs in the group: 5.1152 × 10 ═ 51.152. Since 20.45 is less than 51.152, that is, the throughput of the system corresponding to the scheduling of the UE using the group 2 resource is less than the throughput of the system corresponding to the scheduling of the UE using the group 3 resource, the resource corresponding to the group 3 is finally selected to schedule the UE.

The finally selected resource is as shown in fig. 2d, that is, the PRB (the number of PRBs is 10) allocated for the UE on the CQI value (CQI is 14) and BP [3] corresponding to the 3 rd group is selected to transmit data.

Correspondingly, referring to fig. 3, an embodiment of the present invention further provides a resource determining apparatus, including:

a first unit 31, configured to determine a subband occupied by PRBs pre-allocated to a UE;

a second unit 32, configured to group PRBs pre-allocated to the UE on the subband, and determine a CQI value corresponding to each group and a sum of the number of PRBs in each group;

a third unit 33, configured to determine the scheduling resource of the UE according to the CQI value corresponding to each group and the sum of the number of PRBs in each group.

Preferably, the first unit 31 is further configured to, before determining the subband occupied by the PRBs pre-allocated for the UE: and receiving the CQI value of each sub-band reported by the UE. Thus, a CQI value per UE on each subband may be derived. Of course, the first unit 31 may also be configured to receive the wideband CQI value reported by the UE.

Preferably, the first unit 31 is further configured to modify the CQI value of each sub-band corresponding to each UE after obtaining the CQI value of each UE on each sub-band. The specific modification process may adopt the prior art, and the embodiment of the present invention is not described herein again.

Preferably, the first unit 31 may pre-allocate PRBs for the UE, for example, as follows:

Therefore, after the resource pre-allocation of each UE is completed, the subband occupied by the PRB pre-allocated to each UE can be determined, that is, which BPs are occupied by the PRB allocated to the UE, and for each BP, several PRBs are allocated to the UE on the BP.

Preferably, the second unit 32 groups PRBs pre-allocated to the UE as follows:

sequencing each subband occupied by PRB pre-allocated for the UE according to the sequence of the CQI value of each subband corresponding to the UE from small to large, and dividing the PRB pre-allocated for the UE on the ith ordered subband to the Mth subband into the ith group, wherein i belongs to { 1.,. M }, and M represents the total number of the subbands occupied by the PRB pre-allocated for the UE.

Preferably, for each of the above-mentioned divided groups, the second unit 32 determines the CQI value corresponding to the group as follows:

Preferably, when determining the scheduling resource of the UE according to the CQI value corresponding to each group and the sum of the number of PRBs in each group, the third unit 33 is specifically configured to:

Preferably, for each group, the third unit 33 is specifically configured to, when determining the scheduling resource of the UE according to a product of the efficiency corresponding to the CQI value corresponding to the group and a sum of the PRBs in the group:

Here, for each divided group, the third unit 33 calculates a product value of the efficiency corresponding to the CQI value corresponding to the group and the total sum of the number of PRBs in the group, which may represent the throughput of the system corresponding to when the UE is scheduled by using the resources of the group. Therefore, the calculated product value corresponding to each group is compared, the group corresponding to the maximum product value is finally selected, the CQI value corresponding to the group and the PRB in the group are determined as the scheduling resource of the UE, and therefore, by utilizing the device, the optimal frequency domain resource is more accurately selected, the UE is scheduled by utilizing the resource, and the spectrum efficiency and the throughput of the system can be improved to the maximum extent.

As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention 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 invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. 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 invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. A method for resource determination, the method comprising:

determining a sub-band occupied by a physical resource block PRB pre-allocated to User Equipment (UE);

grouping the PRBs pre-allocated to the UE on the subbands, and determining a Channel Quality Indicator (CQI) value corresponding to each group and the sum of the number of PRBs in each group;

determining scheduling resources of the UE according to the CQI value corresponding to each group and the sum of the PRB number in each group;

wherein the PRBs are grouped in the following manner:

2. The method of claim 1, wherein for each group, the corresponding CQI value for the group is determined as follows:

3. The method according to claim 1 or 2, wherein determining the scheduling resource of the UE according to the CQI value corresponding to each group and the sum of the number of PRBs in each group specifically comprises:

4. The method according to claim 3, wherein for each group, determining the scheduling resource of the UE according to a product of the efficiency corresponding to the CQI value corresponding to the group and a sum of PRBs in the group specifically comprises:

5. An apparatus for resource determination, the apparatus comprising:

a first unit, configured to determine a subband occupied by a physical resource block PRB pre-allocated for a user equipment UE;

a third unit, configured to determine scheduling resources of the UE according to the CQI value corresponding to each group and a sum of the number of PRBs in each group;

wherein the second unit groups the PRBs as follows:

6. The apparatus of claim 5, wherein the second unit determines, for each group, a CQI value corresponding to the group as follows:

7. The apparatus according to claim 5 or 6, wherein the third unit, when determining the scheduling resource of the UE according to the CQI value corresponding to each group and the sum of the number of PRBs in each group, is specifically configured to:

8. The apparatus according to claim 7, wherein the third unit is configured to, for each group, specifically: