CN112954797B

CN112954797B - Method and device for aligning downlink control information DCI

Info

Publication number: CN112954797B
Application number: CN201911266884.4A
Authority: CN
Inventors: 付乾坤; 陈艳红; 江世宇
Original assignee: Datang Mobile Communications Equipment Co Ltd
Current assignee: Datang Mobile Communications Equipment Co Ltd
Priority date: 2019-12-11
Filing date: 2019-12-11
Publication date: 2022-09-30
Anticipated expiration: 2039-12-11
Also published as: CN112954797A

Abstract

The application discloses a method and a device for aligning Downlink Control Information (DCI), wherein the method comprises the following steps: the base station determines a first moment of uplink and downlink scheduling of currently triggering a first group of DCI length alignment; aligning the first group of DCI by using an alignment operation executed by the standard time DCI alignment according to the corresponding relation between the first time and a preset standard time; wherein the aligning operation includes zero padding at the end of the DCI or truncating high bits of a frequency domain resource allocation indication bit domain in the DCI. The method and the device disclosed by the application are used for solving the technical problems that the operation complexity of the alignment operation is increased and the operation time is long due to the DCI alignment mode in the prior art.

Description

Method and device for aligning Downlink Control Information (DCI)

Technical Field

The present application relates to the field of communications technologies, and in particular, to a method and an apparatus for aligning downlink control information DCI.

Background

The 5G (Fifth Generation) communication protocol specifies that there are several formats (formats) of DCI (Downlink Control Information) Information carried by a PDCCH (Physical Downlink Control Channel) of a UE (User Equipment) SS (dedicated search space), including an Uplink DCI for instructing a PUSCH (Physical Uplink Shared Channel) transmission: format 0-0 And format 0-1 And Downlink DCI for indicating PDSCH (Physical Downlink Shared Channel): format1-0 And format 1-1, And formats 2-0, 2-1, 2-2, 2-3 used in some special scenes. Since the bandwidth of the 5G NR (New Radio) is wide, the PDCCH (Physical Downlink Control Channel) cannot occupy the entire frequency band due to the limitation of the UE capability, and thus is divided into multiple core (Control Resource set). Each search space needs to be associated with a coreset resource. The common search space uses coreset0, and the UE-specific search space is associated with a dedicated coreset.

One UE-specific search space cannot configure formats 0-0 And 1-1 simultaneously, i.e. only one category of PDCCH DCI format is supported at the same time.

The formats 0-0 And 1-0 are specific except for the length of the resource allocation field, which needs to be calculated according to the bandwidth. The formats 0 to 1 And the formats 1 to 1 are flexible And changeable, the lengths of most fields are related to parameter configuration, the corresponding PDCCH DCI lengths under different versions of the 5G protocol (e.g., F20 And F30 protocol versions) are different under the same configuration parameter, And the different understanding of the effective time of the parameter by each UE also causes the different corresponding PDCCH DCI lengths. The protocol makes a requirement on the length of the DCI, namely, an alignment operation is required to adjust the length of the DCI. The prior art provides a DCI alignment mode to solve the problem of inconsistent DCI lengths, and the existing alignment mode is:

and after the uplink and downlink scheduling is finished, selecting the DCI required to be used according to the difference of the scheduling types, and then grouping the corresponding DCI. And assigning values to each field corresponding to the DCI when the DCI is in the group, calculating the DCI length after the assignment, and performing DCI length alignment operation.

In the DCI alignment method, the length and the total length of each field corresponding to the DCI need to be calculated each time the post-group DCI is scheduled uplink and downlink, and corresponding alignment operation is performed after the length comparison. The operation complexity of the alignment operation is increased and the operation time is long. If the situation that the field for indicating the resource allocation needs to be truncated is encountered, the truncated field may not correctly indicate the result of the resource allocation information of this time, which may result in the scheduling failure of this time.

Disclosure of Invention

The application provides a method and a device for aligning Downlink Control Information (DCI), which are used for solving the technical problems that the operation complexity of an alignment operation is increased and the operation time is long due to a DCI alignment mode in the prior art.

In a first aspect, a method for length alignment of downlink control information DCI is provided, where the method includes the following steps:

determining a first moment of occurrence of uplink and downlink scheduling currently triggering first group DCI length alignment;

aligning the first group of DCI by using an alignment operation executed by the standard time DCI alignment according to the corresponding relation between the first time and a preset standard time; wherein the aligning operation includes zero padding at the end of the DCI or truncating high bits of a frequency domain resource allocation indication bit field in the DCI.

In the prior art, the length and the total length of each field corresponding to the DCI need to be calculated by the group DCI after each uplink and downlink scheduling, but the length of the field corresponding to the DCI changes when the uplink and downlink scheduling is not performed at each time, so that it is not necessary to calculate the length corresponding to the field in the DCI at each time, but if one DCI alignment length is always used, the DCI cannot be applied to various scenes, so that DCI resources cannot be well applied and the uplink and downlink scheduling cannot be reasonably performed. Based on the above problems in many aspects, and the analysis of the existing DCI alignment condition finds that: the length change of the field corresponding to the DCI for determining the DCI alignment length has a certain rule, the length change can be carried out only at certain moments, other moments are relatively stable, the corresponding DCI alignment length corresponding to the moment when the field length is changed can also be changed, but the DCI alignment length is relatively stable at other moments which are not the set moments, and the alignment length corresponds to the set moments; therefore, based on the above situation analysis, the method provided by the embodiment of the present application is: setting standard alignment time based on the scene that each field corresponding to the DCI will change, and determining an alignment operation corresponding to the standard alignment time (the alignment operation includes whether a specific operation is to complement 0 or truncate, and the number of bits to complement 0 and truncate, etc.); at the non-standard alignment time, the length and the total length of each field of the DCI are not calculated by using the DCI for each alignment, but the DCI is aligned directly based on the alignment operation executed at the standard time. By adopting the method provided by the embodiment of the application, the calculation times of DCI alignment can be effectively reduced; and the efficiency of DCI alignment can be improved under the condition of considering the practicability of DCI alignment.

In the embodiment of the present application, the DCI is divided into two types, namely, common search space CSS DCI and UE-specific search space USS DCI, and the two types of DCI are used in different scenarios, so that there is a certain difference between the alignment modes of the two types of DCI and the time of changing the field length for determining the alignment length of the DCI, and the two cases are described below:

in an optional implementation manner, when the first group of DCI is common search space CSS DCI, aligning the first group of DCI by using an alignment operation performed by the standard time DCI alignment according to a correspondence between the first time and a preset standard time includes:

and if the first moment is after the cell establishment is completed, aligning the first group of DCI by using an alignment operation executed by DCI alignment when the cell establishment is completed.

Based on the foregoing one optional implementation manner, in a further implementation manner, the aligning the first group of DCIs by using an alignment operation performed by the standard time DCI alignment includes:

if the alignment operation is to truncate the high bit of the frequency domain resource allocation indication bit field in the DCI, intercepting the high bit of the frequency domain resource allocation indication bit field of the CSS DCI0-0 in the first group of DCI according to the bit field length of the frequency domain resource indication field intercepted by the alignment operation;

if the alignment operation is zero padding at the end of the DCI, according to the bit number of 0 padding at the end of the CSS DCI0_0 by the alignment operation, 0 of the same bit number is padded at the end of the CSS DCI0_0 in the first group of DCI.

In an optional embodiment, when the first set of DCI is UE-specific search space USS DCI0_0 and USS DCI1_0, according to a correspondence between the first time and a preset standard time, aligning the first set of DCI by using an alignment operation performed by the standard time DCI alignment:

and if the first time is after the RRC SETUP message is sent to the UE and before the reconfiguration finishing message reported by the UE is received, aligning the first group of DCI by using the alignment operation executed by the DCI alignment when the RRC SETUP message is sent to the UE.

according to the USS DCI0_0 or USS DCI1_0 being complemented by 0 and the number of bits for complementing 0 in the alignment operation, the corresponding USS DCI0_0 or USS DCI1_0 in the first group of DCI is complemented by 0 with the same number of bits at the end, so that the USS DCI0_0 or USS DCI1_0 in the first group of DCI is aligned.

In an alternative embodiment, when the first set of DCI is UE-specific search space USS DCI0_1 and USS DCI1_ 1; aligning the first group of DCIs by using an alignment operation executed by the standard time DCI alignment according to the corresponding relation between the first time and a preset standard time;

and if the first moment is after receiving a reconfiguration complete message reported by the UE, aligning the first group of DCI by using an alignment operation executed by DCI alignment when the reconfiguration complete message reported by the UE is received.

In a second aspect, an apparatus for length alignment of downlink control information DCI is provided, where the apparatus may include:

the determining module is used for determining a first moment of occurrence of uplink and downlink scheduling currently triggering first group DCI length alignment;

an alignment module, configured to align the first group of DCI by using an alignment operation performed by the standard time DCI alignment according to a correspondence between the first time and a preset standard time; wherein the aligning operation includes zero padding at the end of the DCI or truncating high bits of a frequency domain resource allocation indication bit field in the DCI.

In an alternative embodiment, when the first set of DCI is common search space CSS DCI; the aligning module is specifically configured to align the first group of DCI by using an aligning operation performed by DCI alignment when the cell establishment is completed, if the first time is after the cell establishment is completed.

Based on the foregoing one optional implementation manner, in a further implementation manner, the alignment module is specifically configured to intercept, if the alignment operation is to intercept high bits of a frequency domain resource allocation indication bit field in DCI, the high bits of the frequency domain resource allocation indication bit field of CSS DCI0-0 in the first group of DCI according to a bit field length of the frequency domain resource indication field intercepted by the alignment operation;

In an alternative embodiment, when the first set of DCI is UE-specific search space USS DCI0_0 and USS DCI1_ 0; the aligning module is specifically configured to align the first group of DCIs by using the aligning operation performed by the DCI alignment when the RRC SETUP message is sent to the UE, if the first time is after an RRC Connection SETUP (RRC Connection SETUP) message is sent to the UE and before a reconfiguration complete message reported by the UE is received.

In an optional embodiment, the alignment module is specifically configured to complement 0 to USS DCI0_0 or USS DCI1_0 and the number of bits of the complementary 0 in the alignment operation, and complement 0 to the end of the corresponding USS DCI0_0 or USS DCI1_0 in the first group of DCIs by the same number of bits, so that the USS DCI0_0 or USS DCI1_0 in the first group of DCIs are aligned.

In an alternative embodiment, when the first set of DCI is UE-specific search space USS DCI0_1 and USS DCI1_ 1; the aligning module is specifically configured to align the first group of DCI by using an aligning operation performed by DCI alignment when the reconfiguration complete message reported by the UE is received, if the reconfiguration complete message reported by the UE is received at the first time.

In a third aspect, a device for length alignment of downlink control information DCI is provided, including:

a memory to store instructions; and

a processor configured to execute the instructions, wherein the instructions, when executed, cause the apparatus to implement the method of any of the embodiments of the first aspect.

In a fourth aspect, a computer storage medium comprises a computer program which, when run on a computer, causes the computer to carry out the method of any one of the embodiments of the first aspect.

The beneficial effect of this application is as follows:

the method and the device provided by the embodiment of the application determine whether the DCI alignment can be performed by using the operation corresponding to the preset standard time based on the time corresponding to the triggered DCI alignment, and if so, the alignment is directly performed by using the alignment operation at the standard time, so that the length and the total length of the field corresponding to the DCI are avoided being calculated when the DCI alignment is performed each time, the problem of scheduling failure caused by truncation of the frequency domain resource allocation information field of the DCI is also avoided, and the calculation amount and the time delay of the DCI alignment are effectively reduced.

Drawings

FIG. 1 is a schematic structural diagram of a system architecture to which the method provided in the embodiments of the present application can be applied;

fig. 2 is a schematic flowchart of a method for DCI length alignment according to an embodiment of the present disclosure;

fig. 3 is a schematic flowchart of a method for aligning specific DCI by using the method provided in the embodiment of the present application;

fig. 4 is a schematic structural diagram of an apparatus for aligning DCI lengths according to an embodiment of the present disclosure;

fig. 5 is a schematic structural diagram of a base station device according to an embodiment of the present application.

Detailed Description

In the prior art, the length and the total length of each field corresponding to the DCI need to be calculated by the group DCI after each uplink and downlink scheduling, but the length of the field corresponding to the DCI changes not during each uplink and downlink scheduling, so that it is not necessary to calculate the length corresponding to the field in the DCI each time in many cases, but if one DCI alignment length is always used, the DCI cannot be applied to various scenes, so that DCI resources cannot be well applied and uplink and downlink scheduling cannot be reasonably performed. Based on the above problems in many aspects, and the analysis of the existing DCI alignment condition finds that: the length change of the field corresponding to the DCI for determining the DCI alignment length has a certain rule, the length change can be carried out only at certain moments, other moments are relatively stable, the corresponding DCI alignment length corresponding to the moment when the field length is changed can also be changed, but the DCI alignment length is relatively stable at other moments which are not the set moments, and the alignment length corresponds to the set moments; therefore, based on the above situation analysis, an embodiment of the present application provides a method for aligning DCI lengths, where the method may include the following steps:

In the method provided by the embodiment of the application, at the non-standard alignment time, the length and the total length of each field of the DCI are not calculated by each alignment of the DCI, but the DCI is aligned directly based on the alignment operation executed at the standard alignment time. By adopting the method provided by the embodiment of the application, the calculation times of DCI alignment can be effectively reduced; and the efficiency of DCI alignment can be improved under the condition of considering the practicability of DCI alignment.

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application.

The terms "first," "second," "third," and "fourth," etc. in the description and claims of this application and in the accompanying drawings are used for distinguishing between different objects and not for describing a particular order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

First, the method provided in the embodiment of the present application may be applied to a system architecture shown in fig. 1, where the system architecture may include a terminal device and a base station (this example only shows a device related to the method provided in the embodiment of the present application, and other structural devices are not specifically limited herein if needed in a specific application scenario). The specific method using scene can be that the base station is opened, the cell is established, the UE searches the cell, initiates random access after establishing the downlink synchronization, and establishes connection with the cell through the random access process. And sending a system message after the cell is established, wherein CSS DCI is used in the UE random access process. After the UE accesses the cell, the operations of UE capability query, report, authentication and the like are carried out, and the USS DCI1_0 and the USS DCI0_0 are used in the process. And then the base station sends a reconfiguration message to the UE, the UE replies a reconfiguration completion message to the base station, and the subsequent uplink and downlink services use USS DCI0_1 and USS DCI1_ 1.

Based on the above usage scenarios, the method and apparatus provided by the embodiments of the present application are further described in detail below with reference to the accompanying drawings and specific application scenarios:

example one

As shown in fig. 2, an embodiment of the present application provides a method for aligning a DCI length, where the method may include:

step 201, determining a first time when uplink and downlink scheduling of a first group of DCI length alignment is triggered currently;

step 202, aligning the first group of DCI by using an alignment operation executed by the standard time DCI alignment according to a corresponding relationship between the first time and a preset standard time; wherein the aligning operation includes zero padding at the end of the DCI or truncating high bits of a frequency domain resource allocation indication bit field in the DCI.

In the embodiment of the present application, the total length of the DCI is calculated at the first time, and then an alignment operation is performed based on the total length, where the specific alignment operation may be truncation or 0 complementation. If the alignment operation is truncation, the frequency domain resource allocation field in the DCI is truncated after the DCI alignment operation is executed; the frequency domain resource allocation field is used for indicating resource allocation information; when the DCI alignment operation is executed according to the prior art, scheduling is performed first and then on the DCI in groups, the alignment operation is performed when the DCI in groups is performed, the scheduling is performed according to the length of the normal DCI during the scheduling, and if the alignment operation is performed after the DCI in groups is scheduled again and needs to be truncated, it is found that the field length is short, and the size of the scheduled data may not be indicated, so that a scheduling failure problem occurs. However, according to the method provided by the embodiment of the present application, the DCI alignment length is calculated at a certain time node (i.e. standard time) triggering DCI alignment, and if the DCI alignment operation needs to be truncated, the scheduler is also notified at the same time.

In the prior art, DCI may be roughly divided into CSS (common search space) DCI and USS (UE-specific search space), where the two DCIs use different scenes, so that corresponding fields determining alignment of the two DCIs are also different, and preset standard times corresponding to the two DCIs are also different, and based on these situations, the method provided in the embodiment of the present application is described for the two DCIs, specifically:

for CSS DCI, the specific implementation may be:

in the prior art, each time there is uplink and downlink scheduling, the length of each field corresponding to CSS DCI0_0 and CSS DCI1_0 is set, and then CSS DCI0_0 is aligned to DCI1_ 0; the specific alignment mode is as follows: if the DCI0_0 is shorter than the DCI1_0, zero padding is performed at the end of the DCI0_0, so that the DCI0_0 is aligned with the DCI1_ 0; if the length of the DCI0_0 is longer than that of the DCI1_0, truncating high bits of a frequency domain resource allocation indication bit field in the DCI0_ 0; thereby making DCI0_0 length aligned with DCI1_ 0;

in the method provided by the embodiment of the present application, when the first group of DCI is common search space CSS DCI, aligning the first group of DCI by using an alignment operation performed by aligning the standard time DCI according to a correspondence between the first time and a preset standard time includes:

When the cell establishment is completed in this embodiment, the inside of the base station sends a cell establishment instruction to an L3 layer of the base station through an OAM (Operation administration and maintenance, external interface module of a processing flow of the base station) module; the L3 layer includes RRC (Radio Resource Control) and NAS (Non-Access Stratum) in the protocol stack. Layer L3 sends message to layer L2; the L2 layer includes a MAC (Media Access Control) layer, a PDCP (Packet Data Convergence Protocol) layer, and an RLC (Radio Link Control) layer, and meanwhile, L3 sends some parameters established by the cells to L2, and after the MAC layer of L2 establishes the cells, the CSS DCI length calculation and alignment operation are performed.

Specifically, the alignment operation performed by the standard time DCI alignment may be performed on the first group of DCI:

When CSS DCI is aligned, a time that may cause a DCI alignment length to change is cell establishment, and a field length corresponding to the CSS DCI may change when the cell is established (for example, a frequency domain resource allocation field, which may be determined according to a specific bandwidth), and each field corresponding to the CSS DCI may calculate a specific length after the cell is established (and the length value has a certain stability). At this time, the length of the CSS DCI0_0 and CSS DCI1_0 are compared, and if the length of the CSS DCI0_0 is greater than the length of the cssci 1_0, the frequency domain resource indicator field bit-domain length of the DCI0_0 needs to be truncated.

Recording information corresponding to a first DCI alignment operation after a cell is established, for example, the first DCI alignment operation is 0 complement, and the number of bits of 0 complement is N; or the DCI alignment operation is a truncation, and the truncation requires truncating the frequency-domain resource indication field bit-domain length of DCI0_ 0. For example: the current initial uplink bandwidth uses 273RB, and the sum of the field lengths of CSS DCI0_0 is 36 bits. The initial downlink bandwidth is 48RB, and the sum of the lengths of the fields of CSS DCI1_0 is 39 bits. Since the CSS DCI0_0 needs to be aligned to the DCI1_0, 3bits 0 is added at the end of the CSS DCI0_0, ensuring that the length is consistent with the DCI1_0 length. Then, regarding the alignment operation as 0 complement, the bit number of the specific 0 complement is 3 bits; correspondingly, after the cell establishment is completed, the base station sends a system message, the random access process of the UE and the paging of the UE need to use CSS DCI0-0, and then 0 of 3bits is supplemented at the end of CSS DCI0_ 0.

The high bit of the frequency domain resource allocation indication bit field in the truncated DCI, for example, the frequency domain resource allocation indication field of CSS DCI0_0, is 16 bits. If the length of the CSS DCI0_0 is longer than the DCI1_0 length, the high bit of the frequency domain resource allocation field of the CSS DCI0_0 is truncated so that the total length is equal to the DCI1_ 0.

The alignment operation corresponding to the standard time may be applicable to CSS DCI _0 (the value corresponds to 1 or 0), and the applicable trigger DCI alignment time range is after the cell is established; after the UE establishes a link, the base station sends a system message at a specific time interval, and when the base station pages the UE, CSS DCI is also used, and these scenes applied to the CSS DCI are aligned by using an alignment operation corresponding to a standard time.

In this embodiment, after calculating and determining that the standard time alignment operation is specifically 0 complementing or truncation, the length and total length of each DCI field need not to be calculated after each scheduling after the cell is established, and if DCI alignment is triggered, the standard time alignment operation is directly referred to; if the high bit of the frequency domain resource allocation indication bit field in the DCI is truncated at the standard time, the recorded truncation specific operation information is directly used for aligning the DCI, and the length of the truncated frequency domain allocation indication field is used for scheduling; if the alignment operation at the standard time is 0 complement, the 0 complement bit number of the last complementary record of the CSS DCI0_0 of the triggered DCI alignment operation (for example, 0 of N bits is complemented at the standard time, and 0 of N bits is complemented at the end of the CSS DCI0_0 at this time).

Second, for the USS DCI, the specific implementation may be:

in the prior art, the USS DCI includes USS DCI0_0, USS DCI1_0, USS DCI0_1, and USS DCI1_1, and when performing an alignment operation, the USS DCI0_0 and USS DCI1_0 are aligned first, and then the USS DCI0_1 and USS DCI1_1 are aligned, in this embodiment of the present application, the two alignment operations are divided into different time nodes (i.e., standard time) to be aligned, and the specific implementation may be:

when the first group of DCIs are UE-specific search space USS DCI0_0 and USS DCI1_0, aligning the first group of DCIs by using an alignment operation executed by the standard time DCI alignment according to the corresponding relation between the first time and a preset standard time:

Further, aligning the first group of DCI by using the alignment operation performed by the standard time DCI alignment includes:

according to the USS DCI0_0 or USS DCI1_0 being complemented by 0 in the alignment operation and the bit number of the complemented 0, the corresponding USS DCI0_0 or USS DCI1_0 in the first group of DCI is complemented by 0 with the same bit number at the end, so that the USS DCI0_0 or USS DCI1_0 in the first group of DCI is aligned.

When the first set of DCIs is UE-specific search space USS DCI0_1 and USS DCI1_ 1; according to the corresponding relation between the first time and a preset standard time, aligning the first group of DCI by using an alignment operation executed by the standard time DCI alignment;

and if the first moment is after receiving the reconfiguration complete message reported by the UE, aligning the first group of DCI by using the alignment operation executed by the DCI alignment when the reconfiguration complete message reported by the UE is received.

Because the lengths of the USS DCI0_1 and the USS DCI × 0 (where × represents 0 or 1) in the prior art are consistent, 1bit of zero is supplemented at the end of the USS DCI0_ 1; when the lengths of the USS DCI1_1 and the USS DCI × 0 are consistent, 1bit zero is complemented at the end of the USS DCI1_ 1;

therefore, when the standard time is aligned, if 1bit 0 is supplemented to the end of USS DCI0_1, then 1bit 0 is directly supplemented to the end of USS DCI0_1 in other operation DCI alignment operations at the standard time. The operation of USS DCI1_1 is similar.

The method provided by the embodiment of the present application is described in detail below with reference to a specific DCI alignment operation to specifically implement USS DCI alignment:

the existing USS DCI includes: the alignment operation of the corresponding USS DCI may include the following four types, i.e., DCI0_0, DCI1_0, DCI0_1, and DCI1_1 (as shown in fig. 3):

step 301, when the UE establishes a link (i.e. when an RRC SETUP message is sent to the UE), length alignment is performed on the USS DCI0_0 and the USS DCI1_ 0;

specifically, the length of the USS DCI0_0 and the USS DCI1_0 may be zero padding at the end of one DCI with a short length according to the length of the longer DCI of the USS DCI0_0 and the USS DCI1_0, so that the USS DCI0_0 and the USS DCI1_0 are aligned. For example: the total length of the USS DCI0_0 in a scheme implemented according to a currently available base station configuration is 36bits (some fields in the DCI are protocol-specified lengths, and some are variable according to different lengths of the configuration, where 36bits is the total length obtained by a currently available configuration). The total length of the USS DCI1_0 is 44 bits. According to the protocol requirements, the USS DCI0_0 is 8 bits shorter than the USS DCI1_0, and 8 bits 0 are complemented at the end of the USS DCI0_ 0.

The configuration of the USS is known at the time of UE link establishment, so the USS DCI0_0 and the length of the USS can be calculated after UE link establishment (where the parameters that have an impact on length change include activation of UL/DL BWP). Since SRS resources are configured in rrcrconfiguration and USS DCI-1 (i.e., 1 or 0) has SRS-related variable length field, configuration of USS DCI-1 in RRC Setup is not supported, and thus USS DCI0_0 and USS DCI1_0 are used at this time, and thus USS DCI0_0 and USS DCI1_0 need to be aligned in this step.

The alignment operation information recorded by the completion operation can be applicable to the period from the UE establishment to the UE reconfiguration completion, and the USS DCI alignment operation triggered in the range can use the alignment operation information recorded during the UE establishment.

Step 302, when the UE is reconfigured, the USS DCI0_1 and the USS DCI1_1 are supplemented;

except that the special UE does not support DCI-1, the normal UE needs to consider modifying USS DCI-0 to USS DCI-1 for dedicated BWP in RRC Reconfiguration. When the lengths of USS DCI0_1 and USS DCI × 0(DCI × 0 includes DCI1_0 and DCI0_0, and DCI × 0 is aligned in step 301) coincide, 1-bit zero is appended to the end of USS DCI0_ 1. When the lengths of the USS DCI1_1 and the USS DCI × 0 are identical, the USS DCI1_1 is complemented by 1bit zero.

For example, according to a scheme implemented by an available base station configuration at present, the total length of the USS DCI0_1 is 46bits, and is not equal to the length of the USS DCI × 0, so that the end does not need to add 1bit 0. The total length of the USS DCI1_1 is 50bits and is not equal to the length of the USS DCI × 0, so that 1bit 0 does not need to be added at the end. After the reconfiguration is completed, the subsequent normal uplink and downlink services (DCI 0_1, DCI1_1) do not need to calculate the total length of the DCI to perform length comparison during each scheduling, the reconfiguration message is sent again to the UE to perform reconfiguration operation until the configuration information of the base station changes, and the comparison of the DCI length is performed again to determine whether to supplement 0 after the reconfiguration operation is completed.

Step 303, judging whether the USS DCI after alignment meets the criterion, if so, ending the supplementing operation flow; otherwise, go to step 304;

after the UE reconfiguration is completed, the type of the monitored DCI configured by the cell for the UE-specific search space is known, and the length of each field of the USS DCI can be calculated. Then, it may be determined whether all DCI satisfy the criterion, where the criterion specifically is: (1) the length of different DCIs configured by the cell does not exceed 4; (2) the length number of DCI scrambled by C-RNTI configured by the cell is not more than 3.

Step 304, deleting the content added by the alignment operation, and re-executing the alignment operation; the method specifically comprises the following steps:

deleting 0bits added by USS DCI-1 in the USS DCI length completion;

wherein, when calculating the length of the USS DCI0_0, the bandwidth of the frequency domain allocation resource indication field is calculated according to the initial UL BWP; in calculating the length of the USS DCI1_0, the bandwidth in which the frequency domain allocation resource indication field is calculated in Coreset0 size, and in initial DL BWP size when Coreset0 is not configured.

The USS DCI0_0 is aligned to the USS DCI1_0, the USS DCI0_0 is zero-padded if the length is short, the high bit of the frequency-cut domain resource allocation indication bit domain is long, and after the USS DCI0_0 is aligned to the USS DCI1_0, the USS DCI _0 and the DCI CSS _0 are aligned, and the DCI alignment operation is completed.

Based on the same concept, an embodiment of the present application further provides a device for aligning a DCI length, where the device may include (as shown in fig. 4):

a determining module 401, configured to determine a first time when uplink and downlink scheduling that currently triggers the first group of DCI length alignment occurs;

an alignment module 402, configured to align the first group of DCI by using an alignment operation performed by the standard time DCI alignment according to a correspondence between the first time and a preset standard time; wherein the aligning operation includes zero padding at the end of the DCI or truncating high bits of a frequency domain resource allocation indication bit field in the DCI.

for the common search space CSS DCI, the apparatus may specifically implement:

in an alternative embodiment, when the first set of DCI is common search space CSS DCI; the aligning module 402 is specifically configured to align the first group of DCI by using an aligning operation performed by DCI alignment when the cell establishment is completed, if the first time is after the cell establishment is completed.

Further, for a specific alignment operation of the DCI, the alignment module 402 is specifically configured to intercept, according to the bit-field length of the frequency-domain resource indication field intercepted by the alignment operation, a high bit of the frequency-domain resource allocation indication bit-field of the CSS DCI0-0 in the first group of DCI if the alignment operation is to intercept the high bit of the frequency-domain resource allocation indication bit-field in the DCI;

For the USS DCI for the UE-specific search space, the specific implementation of the apparatus provided in the embodiment of the present application may be:

when the first group of DCI is the USS DCI0_0 and the USS DCI1_0 for UE-specific search space, the aligning module 402 is specifically configured to align the first group of DCI by using the aligning operation performed by DCI alignment when the RRC SETUP message is sent to the UE if the first time is after the RRC SETUP message is sent to the UE and before a reconfiguration complete message reported by the UE is received.

Further, the specific DCI alignment implementation between the RRC SETUP time and the UE reconfiguration complete time may be:

the alignment module 402 is specifically configured to complement 0 to the USS DCI0_0 or the USS DCI1_0 and the bit number of the complementary 0 in the alignment operation, and complement 0 with the same bit number at the end of the corresponding USS DCI0_0 or USS DCI1_0 in the first group of DCIs, so that the USS DCI0_0 or USS DCI1_0 in the first group of DCIs are aligned.

In addition, after the time when the UE is reconfigured, the method may further include:

when the first set of DCIs is UE-specific search space USS DCI0_1 and USS DCI1_ 1; the aligning module 402 is specifically configured to, if the first time is after receiving a reconfiguration complete message reported by the UE, align the first group of DCI by using an aligning operation performed by DCI alignment when the reconfiguration complete message reported by the UE is received.

Referring to fig. 5, this embodiment further provides a device for aligning a length of downlink control information DCI, where the device may be a base station device, where when an integrated module in the base station device may be implemented in a form of hardware, the base station device may be as shown in fig. 5, and the determining module 401 and the aligning module 402 in fig. 4 may be a processor 501. The processor 501 may be a Central Processing Unit (CPU), a digital processing module, or the like. The routing device may further include a communication interface 502, and the communication interface 502 may be a transceiver, an interface circuit such as a transceiver circuit, a transceiver chip, or the like. The routing device further comprises: a memory 503 for storing programs executed by the processor 501. The memory 503 may be a nonvolatile memory, such as a Hard Disk Drive (HDD) or a solid-state drive (SSD), and may also be a volatile memory (RAM), such as a random-access memory (RAM). The memory 503 is any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, but is not limited to such.

The processor 501 is configured to execute the program code stored in the memory 503, and the processor 501 is specifically configured to implement the steps of the method provided in any of the above embodiments.

The embodiment of the present application does not limit the specific connection medium among the communication interface 502, the processor 501, and the memory 503. In the embodiment of the present application, the memory 503, the processor 502, and the communication interface 502 are connected by the bus 504 in fig. 5, the bus is represented by a thick line in fig. 5, and the connection manner between other components is merely illustrative and not limited. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in FIG. 5, but this is not intended to represent only one bus or type of bus.

As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

In the above embodiment based on the structure shown in fig. 5, the processor 501 and the communication interface 502 implement a scheme corresponding to the method steps 201 and 202, so that the contents described in the above method steps 201 and 202 can be implemented by the processor 501 and the communication interface 502.

Of course, it can be determined from the description of the above method and apparatus embodiments that the solution provided in the embodiments of the present application can be implemented by software through reasonable program compilation, and for this implementation, the embodiments of the present application further provide a computer storage medium, where the computer storage medium includes a computer program, and when the computer program runs on a computer, the computer is enabled to implement all the details of the method provided in the foregoing fig. 2 and fig. 3.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to the application. It will be understood that each flow and/or block of 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 a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.

Claims

1. A method for length alignment of Downlink Control Information (DCI) is characterized by comprising the following steps:

the base station determines a first moment of occurrence of uplink and downlink scheduling currently triggering first DCI length alignment;

aligning the first group of DCI by using an alignment operation executed by the standard time DCI alignment according to the corresponding relation between the first time and a preset standard time; the aligning operation includes zero padding at the end of the DCI or truncation of high bits of a frequency domain resource allocation indication bit field in the DCI, and the standard time includes a time when a cell is established, a time when an RRC SETUP message is sent to the UE, or a time when a reconfiguration complete message reported by the UE is received.

2. The method of claim 1, wherein when the first group of DCIs is a common search space CSSDCI, aligning the first group of DCIs using an alignment operation performed by the standard time DCI alignment according to a correspondence relationship between the first time and a preset standard time comprises:

3. The method of claim 2, wherein aligning the first set of DCIs with an alignment operation performed by the standard time-of-day DCI alignment comprises:

if the alignment operation is to truncate the high bit of the frequency domain resource allocation indication bit field in the DCI, truncating the high bit of the CSS DCI0-0 frequency domain resource allocation indication bit field in the first group of DCI according to the bit field length of the frequency domain resource indication field intercepted by the alignment operation;

if the alignment operation is zero padding at the end of the DCI, the end of CSSDCI0_0 in the first group of DCI is padded with 0 of the same number of bits according to the number of bits of the alignment operation which are 0 padding at the end of CSSDCI0_ 0.

4. The method of claim 1, wherein when the first set of DCIs are UE-specific search spaces USSDCI0_0 and USSDCI1_0, the first set of DCIs are aligned using an alignment operation performed by the standard time-of-day DCI alignment according to a correspondence of the first time-of-day with a preset standard time-of-day:

5. The method of claim 4, wherein aligning the first set of DCIs with an alignment operation performed by the standard time-of-day DCI alignment comprises:

according to the number of bits in the alignment operation that complements USSDCI0_0 or USSDCI1_0 with 0, and complements 0, the corresponding USSDCI0_0 or USSDCI1_0 in the first group of DCIs are complemented by 0 of the same number of bits at the end, so that USSDCI0_0 or USSDCI1_0 in the first group of DCIs are aligned.

6. The method of claim 1, wherein when the first set of DCIs are UE-specific search spaces USSDCI0_ 1 and USSDCI1_ 1; aligning the first group of DCIs by using an alignment operation executed by the standard time DCI alignment according to the corresponding relation between the first time and a preset standard time;

7. A device for length alignment of Downlink Control Information (DCI) is characterized by comprising:

an alignment module, configured to align the first group of DCI by using an alignment operation performed by the standard time DCI alignment according to a correspondence between the first time and a preset standard time; the aligning operation comprises zero padding at the end of the DCI or truncation of high bits of a frequency domain resource allocation indication bit field in the DCI, and the standard time is the time when the cell establishment is completed, the time when the RRC SETUP message is sent to the UE or the time when the reconfiguration complete message reported by the UE is received.

8. The apparatus of claim 7, wherein when the first set of DCIs is a common search space CSSDCI; the aligning module is specifically configured to align the first group of DCI by using an aligning operation performed by DCI alignment when the cell establishment is completed, if the first time is after the cell establishment is completed.

9. The apparatus of claim 8, wherein the aligning module is specifically configured to, if the aligning operation is to truncate high bits of a frequency domain resource allocation indication bit field in the DCI, truncate high bits of a CSSDCI0-0 frequency domain resource allocation indication bit field in the first set of DCI according to a frequency domain resource indication field bit field length truncated by the aligning operation;

10. The apparatus of claim 7, wherein when the first set of DCIs is UE specific search spaces USSDCI0_0 and USSDCI1_ 0; the aligning module is specifically configured to align the first group of DCI by using the aligning operation performed by DCI alignment when the RRC SETUP message is sent to the UE, if the first time is after the RRC SETUP message is sent to the UE and before the reconfiguration complete message reported by the UE is received.

11. The apparatus of claim 10, wherein the alignment module is specifically configured to complement 0 by 0 and by the number of bits of 0 by USSDCI0_0 or USSDCI1_0 in the alignment operation, the end of the corresponding USSDCI0_0 or USSDCI1_0 in the first set of DCI by 0 of the same number of bits, so that USSDCI0_0 or USSDCI1_0 in the first set of DCI is aligned.

12. The apparatus of claim 7, wherein when the first set of DCIs is UE-specific search spaces USSDCI0_ 1 and USSDCI1_ 1; the aligning module is specifically configured to align the first group of DCI by using an aligning operation performed by DCI alignment when the reconfiguration complete message reported by the UE is received, if the reconfiguration complete message reported by the UE is received at the first time.

13. A device for length alignment of Downlink Control Information (DCI) is characterized by comprising:

a memory to store instructions; and

a processor configured to execute the instructions, wherein the instructions, when executed, cause the apparatus to implement the method of any of claims 1 to 6.

14. A computer storage medium, characterized in that the computer-readable storage medium comprises a computer program which, when run on a computer, causes the computer to carry out the method according to any one of claims 1 to 6.