WO2020125525A1

WO2020125525A1 - Resource allocation type determining method and device

Info

Publication number: WO2020125525A1
Application number: PCT/CN2019/124664
Authority: WO
Inventors: 贺璟; 刘建青; 冯均豪
Original assignee: 京信通信系统（中国）有限公司
Priority date: 2018-12-18
Filing date: 2019-12-11
Publication date: 2020-06-25
Also published as: CN109587800B; CN109587800A

Abstract

The present invention relates to a resource allocation type determining method and device: estimating the number of RBs required to be allocated to a UE to be scheduled; if the number of RBs satisfies a preset type 0 allocation condition, determining the resource allocation type of the UE to be type 0; or otherwise, performing resource trial allocation on the UE using type 1, and determining the resource allocation type of the UE according to channel quality of the allocated resources after trial allocation. According to the present invention, RB resources are fully used in downlink resource allocation in an LTE system, and the problem of a drop in air interface performance due to an obvious influence by frequency selectivity effects when a resource allocation type is selected only according to the actual RB demand of the UE.

Description

Method and device for determining resource allocation type

Technical field

The invention relates to the technical field of LTE mobile communication, and in particular to a method and device for determining a resource allocation type.

Background technique

In the LTE system, three types of resource allocation for the downlink physical channel PDSCH: type 0, type 1, and type 2. Type 2 only supports the transmit diversity mode, and is generally used in scenarios where the channel environment is poor or the spatial matrix rank is 1.

Type 0 and type 1 are generally used when the channel environment is better and the space division multiplexing mode is adopted. Type 0 allocates resources in units of RBGs. One RBG consists of multiple RBs (the number of RBs is related to the system bandwidth, such as 20Mhz bandwidth, one RBG consists of 4 RBs), and the maximum system bandwidth can be allocated (for example, 20Mhz bandwidth 100 RBs can be allocated). When using the type 1 allocation type, all RBGs are divided into P subsets, where P is the size of the RBG (for the same reason, when the RBG size is 4 when the bandwidth is 20 Mhz, then P is equal to 4). Each RBG subset p (0<=p<P) contains all RBGs starting at RBG(p) with an interval of P. The VRB resources allocated to a certain UE must come from the same subset. At the same time, due to the limitation of the number of bits in the DCI control information, when type 1 is adopted, the maximum value of RB resources allocated to a single UE is limited (for example, when 20Mhz bandwidth is used, a maximum of 22 RBs are allocated).

If only type 0 is used for resource allocation, due to the limitation of the minimum allocation unit, resources will be wasted; and if only type 1 is used for resource allocation, although it can be accurate to 1 RB, because type 1 is not continuous across the entire bandwidth Allocation, if the frequency selective effect is obvious on the entire bandwidth, the non-continuous allocation characteristics of type 1 will make certain allocated RB resources suffer from strong channel interference, which may lead to an increase in the downlink block error rate. At the same time, type 1 only The RB resources of the same UE can be limited to a subset, which cannot occupy the entire bandwidth resources and generate resource holes.

An existing method for allocating downlink resources in the LTE system is: when the number of RBs to be allocated by the UE to be scheduled is an integer multiple of RBG, select type 0 as the resource allocation type, otherwise select type 1 as the resource allocation type. Although the existing method can make full use of RB resources, it cannot solve the problem that when the number of RBs to be scheduled by the UE to be scheduled is not an integer multiple of RBG, the frequency selective effect is obvious when the type 1 allocation is adopted, and the RB resources are subject to stronger channels The problem of interference degrading the performance of the air interface.

Summary of the invention

In order to overcome at least one of the above-mentioned shortcomings (deficiencies) in the prior art, the present invention provides a method and device for determining the resource allocation type, which can not only make full use of RB resources, but also try to use RB resources with better channel quality. Avoid the degradation of air interface performance caused by the effect of frequency selectivity.

In order to achieve the purpose of the present invention, the following technical solutions are adopted:

In one aspect, the present invention provides a method for determining a resource allocation type, including:

Estimate the number of RBs that need to be allocated to the UE to be scheduled;

If the number of RBs meets the preset type 0 allocation condition, determine that the resource allocation type of the UE to be scheduled is type 0;

Otherwise, type 1 is used to perform trial allocation of resources to the UE to be scheduled, and the resource allocation type of the UE to be scheduled is determined according to the channel quality of the allocated resources after the trial allocation.

When the number of RBs to be allocated to the UE to be scheduled meets the preset type 0 allocation condition, it is determined that the resource allocation type of the UE to be scheduled is type 0; when the number of RBs to be allocated to the UE to be scheduled does not satisfy the preset type 0 allocation When conditions are met, type 1 can be used for resource allocation, but using type 1 for resource allocation may cause some of the allocated resources to be strongly interfered by the channel, so that continuous resources with better channel quality cannot be used collectively, so type 1 is used for resource allocation first. Trial allocation, according to the channel quality of the allocated resources after the trial allocation, finally determine whether the resource allocation type is type 0 or type 1. In this way, not only can the RB resources on the bandwidth be fully utilized to avoid the waste of resources, but also the RB resources with better channel quality can be used as much as possible to avoid the degradation of the air interface performance caused by the influence of the frequency selective effect.

Further, the preset type 0 allocation conditions include: the number of RBs to be scheduled is an integer multiple of the number of RBs in a single RBG or the number of RBs to be scheduled is greater than a specified allocation number, which is the current bandwidth Use type 1 to allocate the maximum number of RBs.

When the number of RBs to be allocated to the UE to be scheduled is an integer multiple of the RBG, determine that the resource allocation type of the UE to be scheduled is type 0; when the number of RBs to be allocated to the UE to be scheduled is not an integer multiple of the RBG and is not greater than using type 1 When performing resource allocation, the maximum number of RBs that a UE can allocate can first use type 1 for resource trial allocation, and finally determine whether the resource allocation type is type 0 or type 1 according to the channel quality of the allocated resources after the trial allocation.

Further, the step of determining the resource allocation type of the UE to be scheduled according to the channel quality of the allocated resources after the trial allocation includes:

The resource allocation type of the UE to be scheduled is determined according to the subband CQI of the subband allocated after the trial allocation.

Further, the step of determining the resource allocation type of the UE to be scheduled according to the subband CQI information of the subband allocated after the trial allocation includes:

Calculate the channel interference difference parameter according to the subband CQI of the subband allocated after the resource trial allocation;

Determine whether the channel interference difference parameter is greater than a preset threshold;

If yes, determine that the resource allocation type of the UE to be scheduled is type 0;

If not, it is determined that the resource allocation type of the UE to be scheduled is type 1.

Further, the channel interference difference parameter includes the variance or standard deviation of the subband CQI or the difference between the maximum value and the minimum value.

Further, the step of estimating the number of RBs that need to be allocated to the UE to be scheduled includes:

The number of RBs to be allocated to the UE to be scheduled is estimated according to the downlink transmission efficiency of the UE to be scheduled, the number of available REs for each RB, and the size of the downlink buffer data of the UE to be scheduled.

On the other hand, the present invention also provides a device for determining the resource allocation type, including:

RB number estimation module, used to estimate the number of RBs to be allocated to the UE to be scheduled;

An initial resource allocation type determination module, used to determine whether the number of RBs satisfies the preset type 0 allocation conditions, and if so, determine that the resource allocation type of the UE to be scheduled is type 0, otherwise determine the resource of the UE to be scheduled The allocation type is to be determined;

A resource trial allocation module, configured to use type 1 to perform trial resource allocation for the UE to be scheduled when it is determined that the resource allocation type of the UE to be scheduled is a pending state;

The final resource allocation type determination module is used to determine the resource allocation type of the UE to be scheduled according to the channel quality of the allocated resources after the trial allocation.

When the RB number estimation module estimates that the number of RBs to be allocated to the UE to be scheduled meets the preset type 0 allocation condition, the initial resource allocation type determination module determines that the resource allocation type of the UE to be scheduled is type 0; when the RB number estimation module estimates When the number of RBs that need to be allocated to the UE to be scheduled does not meet the preset type 0 allocation conditions, type 1 can be used for resource allocation, but type 1 for resource allocation may cause some of the allocated resources to be affected by strong channel interference Continuous resources with good channel quality cannot be used collectively, so the resource trial allocation module uses type 1 for resource trial allocation, and the final resource allocation type determination module finally determines the resource allocation type according to the channel quality of the allocated resources after trial allocation is type 0 or type 1. In this way, not only can the RB resources on the bandwidth be fully utilized to avoid the waste of resources, but also the RB resources with better channel quality can be used as much as possible to avoid the degradation of the air interface performance caused by the influence of the frequency selective effect.

When the RB number estimation module estimates that the number of RBs that need to be allocated to the UE to be scheduled is an integer multiple of RBG, the initial resource allocation type determination module determines that the resource allocation type of the UE to be scheduled is type 0; when the RB number estimation module estimates that the allocation needs to be When the number of RBs for the UE to be scheduled is not an integer multiple of the RBG and is not greater than the maximum number of RBs that a UE can allocate when using type 1 for resource allocation, type 1 can be used for resource trial allocation. The final resource allocation type determination module is based on trial The channel quality of the allocated resources after allocation finally determines whether the resource allocation type is type 0 or type 1.

Further, the final resource allocation type determination module specifically includes:

The subband CQI management module is used to obtain the subband CQI of the subband allocated after the resource trial allocation;

The type selection module is configured to determine the resource allocation type of the UE to be scheduled according to the subband CQI.

Further, the sub-band CQI management module is specifically used to obtain the sub-band CQI of the sub-band allocated after the resource trial allocation, and calculate the channel interference difference parameter;

The type selection module is specifically used to determine whether the channel interference difference parameter is greater than a preset threshold, if so, determine the resource allocation type of the UE to be scheduled is type 0, if not, determine the UE to be scheduled The resource allocation type is type 1.

Further, the RB number estimation module is specifically used for:

In addition, the present invention also provides a computer-readable storage medium on which a computer program is stored, which when executed by a processor implements the steps of the method described above.

In addition, the present invention also provides a computer device, including a memory, a processor, and a computer program stored on the memory and executable on the processor, and the processor implements the computer program as described above when executing the computer program Method steps.

Compared with the prior art, the beneficial effect of the technical solution of the present invention is: by estimating the current actual RB demand of the UE to be scheduled, and combining the UE's subband CQI information to select an appropriate resource allocation type, not only can downlink in the LTE system Making full use of RB resources when allocating resources can also effectively solve the problem that when the resource allocation type is selected only by the actual RB demand of the UE, the frequency selective effect is obviously affected, which in turn leads to the degradation of air interface performance.

BRIEF DESCRIPTION

FIG. 1 is a flowchart of a first method of an embodiment of the present invention.

Fig. 2 is a flowchart of a second method according to an embodiment of the present invention.

FIG. 3 is a schematic diagram of resource allocation by using type 1 according to an embodiment of the present invention.

4 is a block diagram of a first device structure of an embodiment of the present invention.

Fig. 5 is a block diagram of a second device result of an embodiment of the present invention.

detailed description

The drawings are for illustrative purposes only and cannot be construed as limitations to this patent;

It is understandable to those skilled in the art that some well-known structures and their descriptions in the drawings may be omitted.

The technical solution of the present invention will be further described below with reference to the drawings and embodiments.

Example 1

This embodiment provides a method for determining a resource allocation type, as shown in FIG. 1, including:

S100. Estimate the number of RBs that need to be allocated to the UE to be scheduled;

S200. If the number of RBs meets the preset type 0 allocation conditions, determine that the resource allocation type of the UE to be scheduled is type 0, otherwise execute S300;

S300. Use type 1 to perform resource trial allocation, and determine the resource allocation type of the UE to be scheduled according to the channel quality of the allocated resources after trial allocation.

In step S100, the estimation of the number of RBs to be allocated to the UE to be scheduled specifically includes:

In the specific implementation process, first estimate the number of bits that each RB can carry based on the downlink transmission efficiency of the UE to be scheduled and the number of available REs for each RB, and the number of bits that each RB can carry is the downlink transmission efficiency of the UE to be scheduled times Take the number of available REs for each RB. Among them, the downlink transmission efficiency of the UE to be scheduled can be obtained from the CQI lookup table of the UE to be scheduled; the number of available REs for each RB is the total number of REs minus the number of REs occupied by the RS, and then minus the PDCCH (Physical Downlink Control Channel) , Physical Downlink Control Channel) and PCFICH (Physical Control Format Indicator Channel), obtained after the number of REs occupied. The number of RBs to be allocated to the UE to be scheduled is estimated according to the number of bits that each RB can carry and the size of the downlink buffer data of the UE to be scheduled. First determine whether the current mode is MIMO (Multiple-Input Multiple-Output) multiplexing mode, if so, the number of RBs that need to be allocated to the UE to be scheduled is the size of the downlink buffer data divided by the number of bits that each RB can carry Multiply by 2 again, otherwise the number of RBs to be allocated to the UE to be scheduled is the size of the downlink buffer data divided by the number of bits that each RB can carry.

When the resource allocation type of the UE to be scheduled is type 0, RB resources are allocated to the UE to be scheduled in units of RBGs, and one RBG is composed of multiple RBs. The number of RBs forming an RBG, that is, the size of the RBG, is determined by the system bandwidth according to the LTE communication protocol. For example, the RBG size at 20Mhz bandwidth is 4 RBs, and the RBG size at 10Mhz bandwidth is 3 RBs.

When the resource allocation type of the to-be-scheduled UE is type 1, RB resources are allocated to the to-be-scheduled UE in RB units, and due to the limitation of the number of bits in the DCI control information, type 1 is used to allocate resources to a single UE The maximum RB resource is limited. When using type 1, the maximum number of RBs that a UE can allocate is determined by the system bandwidth according to the LTE communication protocol. For example, the maximum number of RBs that a UE can allocate when using type 1 at 20 MHz bandwidth is 22.

In step S200, the preset type 0 allocation conditions include: the number of RBs to be scheduled is an integer multiple of the number of RBs in a single RBG or the number of RBs to be scheduled is greater than a specified allocation number, which is the current bandwidth The maximum number of RBs that can be allocated under type 1 is adopted.

If the estimated number of RBs that need to be allocated to the UE to be scheduled in step S100 is greater than the maximum number of RBs that a UE can allocate when resource allocation is performed using type 1, type 1 cannot be used as the resource allocation type of the UE to be scheduled. Determine that the resource allocation type of the UE to be scheduled is type 0; if the number of RBs to be allocated to the UE to be scheduled is an integer multiple of the RBG size, using type 0 for resource allocation can make full use of the RB resources on the bandwidth and avoid waste of resources. Determine that the resource allocation type of the UE to be scheduled is type 0; but if the number of RBs to be allocated to the UE to be scheduled is not an integer multiple of the RBG size and is less than the maximum number of RBs that can be allocated by one UE when resource allocation is performed using type 1, then determine the pending The resource allocation type of the scheduling UE is in a pending state, and the resource allocation type needs to be further determined.

When it is determined that the resource allocation type of the UE to be scheduled is type 0, the resource allocation of the UE to be scheduled can be performed by type 0 according to the principle of sub-band priority allocation with higher sub-band CQI.

Based on the principle of priority allocation of subbands with higher subband CQI, type 0 is used for resource allocation. The specific process may be: first find the subband with the highest CQI of the subband, and allocate RBG on the subband to the UE to be scheduled To the scheduling UE; continue to search for the subband with the highest subband CQI among the remaining subbands, and allocate the RBG that can be allocated to the UE to be scheduled to the scheduling UE until the number of RBGs allocated to the UE to be scheduled meets the requirements The estimated number of RBs that need to be allocated to the UE to be scheduled. The specific process may also be: searching for RBGs that can be allocated to a certain UE to be scheduled, and selecting RBGs located in a number of subbands with the largest subband CQI from these RBGs to be preferentially allocated to the UE to be scheduled.

In step S300, when it is determined in step S200 that the number of RBs to be allocated to the UE to be scheduled does not satisfy the preset type 0 allocation condition, type 1 is used to perform resource trial allocation for the UE to be scheduled, specifically, the subband CQI may be higher The principle of sub-band priority allocation is to use type 1 to perform resource trial allocation for the UE to be scheduled.

Based on the principle of priority allocation of subbands with higher subband CQI, type 1 is used for resource trial allocation. The specific process may be: first find the subband with the highest CQI of the subband, and assign the subband to the RB that can be allocated to the UE to be scheduled Allocate to the UE to be scheduled; continue to search for the subband with the highest subband CQI among the remaining subbands, and allocate the RB that can be allocated to the UE to be scheduled on the subband to the UE to be scheduled until the total number of UEs to be scheduled is allocated The number of RBs meets the estimated number of RBs that need to be allocated to the UE to be scheduled. The specific process may also be: first search for RBs that can be allocated to a certain UE to be scheduled, and select from these RBs RBs located on the subbands with the largest subband CQI to be preferentially allocated to the UE to be scheduled.

The use of type 0 for resource allocation is a continuous allocation of resources, while the use of type 1 for resource allocation is a non-continuous allocation of resources. Under the influence of frequency selective effects, its non-continuous allocation characteristics will cause partial allocation of resources The channel interference is strong, resulting in an increase in the downlink block error rate, which affects the guarantee of communication quality.

If the channel quality of the allocated resources is better after the trial allocation and is less affected by the frequency selective effect, you can choose type 1 for resource allocation; if the channel quality of the allocated resources after the trial allocation is poor, the frequency selection The effect of the sexual effect is obvious. At this time, selecting type 1 for discontinuous resource allocation will result in insufficient utilization of resources with better channel quality, while selecting type 0 for resource allocation may focus on selecting continuous resources with better channel quality for allocation, reducing Downlink block error rate to avoid degradation of air interface performance, so select type 0 for resource allocation.

In step S300, the step of determining the resource allocation type of the UE to be scheduled according to the channel quality of the resource allocated after the trial allocation specifically includes: determining the UE to be scheduled according to the subband CQI of the subband allocated after the trial allocation Resource allocation type.

The channel quality of the resource allocated after the trial allocation can be evaluated by the subband CQI of the allocated subband after the trial allocation. The subband CQI may be determined in real time according to feedback information fed back to the base station by the UE to be scheduled in real time. When the channel quality of the allocated resource is estimated to be better through the subband CQI, the resource allocation type of the UE to be scheduled is determined to be type 1; when the channel quality of the allocated resource is estimated to be poor through the subband CQI, the UE to be scheduled is determined The type of resource allocation is type 0. Thus, the reliability of downlink data transmission can be avoided, and the communication quality can be ensured.

As shown in FIG. 2, step S300 may specifically include:

S310. Use type 1 for resource trial allocation;

S320. Calculate the channel interference difference parameter according to the subband CQI of the subband allocated after the resource trial allocation;

S330. Determine whether the channel interference difference parameter is greater than a preset threshold;

S340. If yes, determine that the resource allocation type of the UE to be scheduled is type 0;

S350. If not, determine that the resource allocation type of the UE to be scheduled is type 1.

According to the channel interference difference parameter calculated by the sub-band CQI, the size of the frequency selective effect of the type 1 resource allocation can be evaluated. When the calculated channel interference difference parameter is not greater than the preset threshold, it indicates that the current frequency selective effect is less affected, the resource allocated after the trial allocation is less affected by channel interference, and selecting type 1 for resource allocation may be more sufficient It uses resources with less channel interference and can guarantee the communication quality of the UE to be scheduled. Therefore, type 1 is selected for resource allocation. When the calculated channel interference difference parameter is greater than the preset threshold, it indicates that the current frequency selective effect has a greater impact. The resource allocated after the trial allocation is subject to greater channel interference difference. In this case, selecting type 1 for resource allocation will result in Can not make full use of resources with less channel interference, and choose type 0 for resource allocation, you can focus on selecting continuous resources with less channel interference for allocation, reduce downlink block error rate, and avoid degradation of air interface performance, so choose type 0 for resource allocation.

In step S320, the channel interference difference parameter includes the variance or standard deviation or the difference between the maximum value and the minimum value of the subband CQI.

Variance, standard deviation, the difference between the maximum value and the minimum value can reflect the fluctuation of the subband CQI of the subband allocated after the trial allocation. If the variance or standard deviation or the difference between the maximum value and the minimum value is large, it indicates that the subband CQI Large fluctuation means that some of the allocated sub-bands are subject to strong channel interference, and the current frequency selective effect is obviously affected.

When the variance or standard deviation of the subband CQI or the difference between the maximum value and the minimum value is not greater than the preset threshold, it indicates that the subband CQI difference of different subbands allocated after the type 1 trial allocation is small, that is, the current frequency The effect of selectivity is small, and the difference between the resources allocated after the trial allocation is less affected by channel interference. Selecting type 1 for resource allocation can make full use of the resources with less channel interference and can guarantee the communication of the UE to be scheduled Quality, so choose type 1 for resource allocation. When the variance or standard deviation of the subband CQI or the difference between the maximum value and the minimum value is greater than the preset threshold, it indicates that the subband CQI of different subbands allocated after the type 1 trial allocation is different, that is, the current frequency selection The effect of the sexual effect is greater, and the resources allocated after the trial allocation vary greatly due to channel interference, so type 0 is selected for resource allocation.

As shown in Figure 3, suppose the current LTE system bandwidth is 20Mhz. According to the LTE system protocol, there are a total of 100 RBs divided into 13 subbands, the first 12 subbands, each subband contains 8 RBs, and the last subband contains 4 RB. If it is estimated that the number of RBs to be allocated to a UE to be scheduled is 10, the sub-band with higher CQI priority is used as the principle to use type 1 for resource allocation. The result of the trial allocation is

sequence numbers

0, 1, 2, 3. The RB resources of 16, 16, 18, 19, 32, and 33 are allocated to the scheduling UE. These RB resources are located on subband 0, subband 2, and subband 4, respectively. The subband CQIs of these three subbands are It's 15, 14, 8.

When the channel interference difference parameter is the difference between the maximum value and the minimum value of the subband CQI, according to the subband CQI of the three subbands at this time, the maximum value is 15 and the minimum value is 8, the maximum and minimum CQI of the subband can be calculated The difference between the values is 7; if the preset threshold of the difference is 3, the difference between the maximum and minimum values of the subband CQI is greater than the preset threshold, indicating that the frequency selective effect is obvious, so select type 0 for resource allocation, so that The subbands with better subband CQI are selected collectively for continuous resource allocation.

When the channel interference difference parameter is the subband CQI variance, according to the subband CQI of the three subbands at this time, the average value is 12.33, the subband CQI variance can be calculated to be 6.25. If the preset threshold of the variance is 5, the subband The variance of the CQI in the band is greater than the preset threshold, indicating that the frequency selective effect is obvious, so the type 0 is selected for resource allocation, so that subbands with better subband CQI can be selected for continuous resource allocation.

When the channel interference difference parameter is the subband CQI standard deviation, the subband CQI standard deviation can also be calculated to be 2.50. If the preset threshold of the standard deviation is 2, the subband CQI variance is greater than the preset threshold, indicating frequency selection The sexual effect is obvious, so select type 0 for resource allocation, so that subbands with better subband CQI can be selected for continuous resource allocation.

Example 2

Based on the same inventive concept as Embodiment 1, this embodiment provides a device for determining a resource allocation type, as shown in FIG. 4, including:

The RB number estimation module 100 is used to estimate the number of RBs that need to be allocated to the UE to be scheduled;

The initial resource allocation type determination module 200 is used to determine whether the number of RBs satisfies the preset type 0 allocation conditions, and if so, determine that the resource allocation type of the UE to be scheduled is type 0, otherwise determine the UE to be scheduled. The resource allocation type is to be determined;

The resource trial allocation module 300 is configured to use type 1 to perform resource trial allocation for the UE to be scheduled when it is determined that the resource allocation type of the UE to be scheduled is a pending state;

The final resource allocation type determining module 400 is configured to determine the resource allocation type of the UE to be scheduled according to the channel quality of the allocated resources after the trial allocation.

The RB number estimation module 100 is specifically used for:

In the specific implementation process, the RB number estimation module 100 first estimates the number of bits that each RB can carry according to the downlink transmission efficiency of the UE to be scheduled and the number of available REs of each RB, and the number of bits that each RB can carry is the UE to be scheduled The downlink transmission efficiency is multiplied by the number of available REs per RB. The downlink transmission efficiency of the UE to be scheduled can be obtained from the CQI lookup table of the UE to be scheduled; the number of available REs for each RB is the total number of REs minus the number of REs occupied by RS, and then the REs occupied by PDCCH and PCFICH Get after the number. The RB number estimation module 100 then estimates the number of RBs to be allocated to the UE to be scheduled according to the number of bits that each RB can carry and the downlink buffer data size of the UE to be scheduled. The RB number estimation module 100 first determines whether the current mode is the MIMO (Multiple-Input Multiple-Output) multiplexing mode. If so, the number of RBs to be allocated to the UE to be scheduled is the size of the downlink buffer data divided by each RB The number of bits that can be carried is then multiplied by 2. If otherwise, the number of RBs to be allocated to the UE to be scheduled is the size of the downlink buffer data divided by the number of bits that can be carried by each RB.

The preset type 0 allocation conditions include: the number of RBs to be scheduled is an integer multiple of the number of RBs in a single RBG or the number of RBs to be scheduled is greater than a specified allocation number, which uses type 1 under the current bandwidth The maximum number of RBs that can be allocated.

If the initial resource allocation type determination module 200 determines that the number of RBs estimated by the RB number estimation module 100 that needs to be allocated to the UE to be scheduled is greater than the maximum number of RBs that one UE can allocate when resource allocation is performed using type 1, then type 1 cannot be used as For the resource allocation type of the UE to be scheduled, it should be determined that the resource allocation type of the UE to be scheduled is type 0; if the initial resource allocation type determination module 200 determines that the number of RBs to be allocated to the UE to be scheduled is an integer multiple of the RBG size, use type 0 resource allocation can make full use of the RB resources on the bandwidth to avoid waste of resources. It should be determined that the resource allocation type of the UE to be scheduled is type 0; but if the initial resource allocation type determination module 200 determines that the RB needs to be allocated to the UE to be scheduled If the number is not an integer multiple of the RBG size and is less than the maximum number of RBs that a UE can allocate when using type 1 for resource allocation, the resource allocation type of the UE to be scheduled is determined to be in a pending state, and the resource allocation type needs to be further determined.

When the initial resource allocation type determination module 200 determines that the resource allocation type of the to-be-scheduled UE is in a pending state, the resource trial allocation module 300 adopts type 1 to perform trial resource allocation for the scheduled UE, specifically, a subband with a higher subband CQI may be preferentially allocated In principle, use type 1 to perform resource trial allocation for the UE to be scheduled.

If the final resource allocation type determination module 400 determines that the channel quality of the allocated resources is better after the trial allocation and is less affected by the frequency selective effect, then select type 1 for resource allocation; if the final resource allocation type determination module 400 determines the trial allocation The channel quality of the allocated resources is poor, and it is obviously affected by the frequency selective effect. Then select type 0 for resource allocation, because selecting type 1 for discontinuous resource allocation at this time will result in the inability to fully utilize resources with better channel quality. By selecting type 0 for resource allocation, continuous resources with better channel quality can be selected for allocation to reduce downlink block error rate and avoid degradation of air interface performance.

The final resource allocation type determination module 400 specifically includes:

The subband CQI management module 410 is used to obtain the subband CQI of the subband allocated after the resource trial allocation;

The type selection module 420 is configured to determine whether the resource allocation type of the UE to be scheduled is type 0 or type 1 according to the subband CQI.

The channel quality of the resource allocated after the trial allocation can be evaluated by the subband CQI of the allocated subband after the trial allocation. The subband CQI management module 410 determines the subband CQI in real time according to the feedback information fed back to the base station by the UE to be scheduled in real time. When the type selection module 420 evaluates that the channel quality of the allocated resource is better according to the subband CQI, it determines that the resource allocation type of the UE to be scheduled is type 1; when the channel quality of the allocated resource is estimated to be poor through the subband CQI, it is determined The resource allocation type of the UE to be scheduled is type 0. Thus, the reliability of downlink data transmission can be avoided, and the communication quality can be ensured.

The sub-band CQI management module 410 is specifically configured to obtain the sub-band CQI of the sub-band allocated after the resource trial allocation and calculate the channel interference difference parameter;

The type selection module 420 is specifically configured to determine whether the channel interference difference parameter is greater than a preset threshold. If so, determine that the resource allocation type of the UE to be scheduled is type 0; if not, determine the UE to be scheduled The type of resource allocation is type 1.

The subband CQI management module 410 obtains the subband CQI in real time, and calculates the channel interference difference parameter according to the subband CQI. The type selection module 420 can evaluate the size of the frequency selective effect of resource allocation using type 1 according to the channel interference difference parameter. When the type selection module 420 judges that the calculated channel interference difference parameter is not greater than the preset threshold, it indicates that the current frequency selective effect is less affected, and the resource allocated after the trial allocation has less difference in channel interference due to the selection of type 1. Resource allocation can make full use of resources with less channel interference and can guarantee the communication quality of the UE to be scheduled, so type 1 is selected for resource allocation. When the type selection module 420 judges that the calculated channel interference difference parameter is greater than the preset threshold, it indicates that the current frequency selective effect has a greater influence. The resource allocated after the trial allocation has a greater difference in channel interference because of the type 1 selection. Resource allocation will result in the inability to make full use of resources with less channel interference. Selecting type 0 for resource allocation can centrally select continuous resources with less channel interference for allocation, reducing downlink block error rate and avoiding air interface performance degradation, so choose type 0 Perform resource allocation.

In this embodiment, the channel interference difference parameter includes the variance or standard deviation of the subband CQI or the difference between the maximum value and the minimum value. Variance, standard deviation, the difference between the maximum value and the minimum value can reflect the fluctuation of the subband CQI of the subband allocated after the trial allocation. If the variance or standard deviation or the difference between the maximum value and the minimum value is large, it indicates that the subband CQI Large fluctuation means that some of the allocated sub-bands are subject to strong channel interference, and the current frequency selective effect is obviously affected.

Example 3

This embodiment provides a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the steps of the method described in Embodiment 1 are implemented. Not only can the RB resources be fully utilized, but it can also effectively solve the problem that when the resource allocation type is selected only by the actual RB demand of the UE, the frequency selective effect is obviously affected, which in turn leads to the degradation of air interface performance.

Example 4

This embodiment provides a computer device, including a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the computer program, it is implemented as in Embodiment 1. Describe the steps of the method. Not only can the RB resources be fully utilized, but it can also effectively solve the problem that when the resource allocation type is selected only by the actual RB demand of the UE, the frequency selective effect is obviously affected, which in turn causes the air interface performance to decrease.

The same or similar reference numbers correspond to the same or similar parts;

The positional relationships described in the drawings are for illustrative purposes only and cannot be construed as limitations to this patent;

Obviously, the above examples of the present invention are only examples for clearly illustrating the present invention, rather than limiting the embodiments of the present invention. For those of ordinary skill in the art, based on the above description, other different forms of changes or changes can also be made. There is no need to exhaustively list all implementations. Any modification, equivalent replacement and improvement made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

A method for determining a resource allocation type is characterized by including:

Estimate the number of RBs that need to be allocated to the UE to be scheduled;

If the number of RBs meets the preset type 0 allocation condition, determine that the resource allocation type of the UE to be scheduled is type 0;

Otherwise, type 1 is used to perform trial allocation of resources to the UE to be scheduled, and the resource allocation type of the UE to be scheduled is determined according to the channel quality of the allocated resources after the trial allocation.
The method for determining a resource allocation type according to claim 1, wherein the preset type 0 allocation condition includes: the number of RBs to be scheduled is an integer multiple of the number of RBs in a single RBG or the RBs to be scheduled The number is greater than the specified allocation number, which is the maximum RB number that can be allocated using type 1 under the current bandwidth.
The method for determining a resource allocation type according to claim 1, wherein the step of determining the resource allocation type of the to-be-scheduled UE according to the channel quality of the allocated resource after the trial allocation includes: according to the allocation after the trial allocation The subband CQI of the received subband determines the resource allocation type of the UE to be scheduled.
The method for determining a resource allocation type according to claim 3, wherein the step of determining the resource allocation type of the UE to be scheduled according to the subband CQI of the subband allocated after the trial allocation includes:

Calculate the channel interference difference parameter according to the subband CQI of the subband allocated after the resource trial allocation;

Determine whether the channel interference difference parameter is greater than a preset threshold;

If yes, determine that the resource allocation type of the UE to be scheduled is type 0;

If not, it is determined that the resource allocation type of the UE to be scheduled is type 1.
The method for determining a resource allocation type according to claim 4, wherein the channel interference difference parameter includes a variance or standard deviation or a difference between a maximum value and a minimum value of the CQI of the subband.
The method for determining a resource allocation type according to any one of claims 1 to 5, wherein the step of estimating the number of RBs that need to be allocated to the UE to be scheduled includes:

The number of RBs to be allocated to the UE to be scheduled is estimated according to the downlink transmission efficiency of the UE to be scheduled, the number of available REs for each RB, and the size of the downlink buffer data of the UE to be scheduled.
A device for determining a resource allocation type is characterized by comprising:

RB number estimation module, used to estimate the number of RBs to be allocated to the UE to be scheduled;

An initial resource allocation type determination module, used to determine whether the number of RBs satisfies the preset type 0 allocation conditions, and if so, determine that the resource allocation type of the UE to be scheduled is type 0, otherwise determine the resources of the UE to be scheduled The allocation type is to be determined;

A resource trial allocation module, configured to use type 1 to perform trial resource allocation for the UE to be scheduled when it is determined that the resource allocation type of the UE to be scheduled is a pending state;

The final resource allocation type determination module is used to determine the resource allocation type of the UE to be scheduled according to the channel quality of the allocated resources after the trial allocation.
The device for determining the resource allocation type according to claim 7, wherein the preset type 0 allocation condition includes: the number of RBs to be scheduled is an integer multiple of the number of RBs in a single RBG or the RBs to be scheduled The number is greater than the specified allocation number, which is the maximum RB number that can be allocated using type 1 under the current bandwidth.
The device for determining the resource allocation type according to claim 7, wherein the final resource allocation type determining module specifically includes:

The subband CQI management module is used to obtain the subband CQI of the subband allocated after the resource trial allocation;

The type selection module is configured to determine the resource allocation type of the UE to be scheduled according to the subband CQI.
The device for determining the resource allocation type according to claim 9, wherein:

The sub-band CQI management module is specifically used to obtain the sub-band CQI of the sub-band allocated after the resource trial allocation, and calculate the channel interference difference parameter;

The type selection module is specifically used to determine whether the channel interference difference parameter is greater than a preset threshold, if so, determine the resource allocation type of the UE to be scheduled is type 0, if not, determine the UE to be scheduled The resource allocation type is type 1.
The apparatus for determining a resource allocation type according to claim 10, wherein the channel interference difference parameter includes a variance or standard deviation of the subband CQI or a difference between a maximum value and a minimum value.
The method for determining a resource allocation type according to any one of claims 7-11, wherein the RB number estimation module is specifically used to:

The number of RBs to be allocated to the UE to be scheduled is estimated according to the downlink transmission efficiency of the UE to be scheduled, the number of available REs for each RB, and the size of the downlink buffer data of the UE to be scheduled.
A computer-readable storage medium on which a computer program is stored, characterized in that, when the computer program is executed by a processor, the steps of the method according to any one of claims 1-6 are implemented.
A computer device, including a memory, a processor, and a computer program stored on the memory and executable on the processor, characterized in that, when the processor executes the computer program, claims 1-6 are implemented Any one of the steps of the method.