CN114765480A - DCI size determination method, device, terminal and storage medium - Google Patents

DCI size determination method, device, terminal and storage medium Download PDF

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CN114765480A
CN114765480A CN202110048191.9A CN202110048191A CN114765480A CN 114765480 A CN114765480 A CN 114765480A CN 202110048191 A CN202110048191 A CN 202110048191A CN 114765480 A CN114765480 A CN 114765480A
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size
dci
dci format
rnti
sizes
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杨拓
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China Mobile Communications Group Co Ltd
China Mobile Communications Ltd Research Institute
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China Mobile Communications Group Co Ltd
China Mobile Communications Ltd Research Institute
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0028—Formatting
    • H04L1/003—Adaptive formatting arrangements particular to signalling, e.g. variable amount of bits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0028—Formatting
    • H04L1/0031—Multiple signaling transmission

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  • Computer Networks & Wireless Communication (AREA)
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Abstract

The application discloses a method, a device, a terminal and a storage medium for determining the size of Downlink Control Information (DCI). The method comprises the following steps: the terminal determines the size of a DCI format of a first Radio Network Temporary Identity (RNTI) scrambled Cyclic Redundancy Check (CRC) and the sizes of other DCI formats; the total number of different DCI sizes detected by the terminal is not more than 4, and the total number of the DCI sizes of different cell radio network temporary identifications C-RNTIs and the DCI size of the first RNTI is not more than 3; wherein the first RNTI is shared by a plurality of terminals; the other DCI formats are used to schedule a physical shared channel.

Description

DCI size determination method, device, terminal and storage medium
Technical Field
The present application relates to the field of wireless communications, and in particular, to a method, an apparatus, a terminal, and a storage medium for determining a Downlink Control Information (DCI) size.
Background
After introducing a multicast and/or broadcast mechanism in a new air interface (NR), a network side uses a Radio Network Temporary Identifier (RNTI) shared by a plurality of terminals to carry out a Physical Downlink Control Channel (PDCCH) scrambled by Cyclic Redundancy Check (CRC) to schedule a Physical Downlink Shared Channel (PDSCH) carrying corresponding multicast and/or broadcast services, namely a plurality of terminals detect the same PDCCH to receive the same PDSCH. Under a scheduling mechanism that a plurality of terminals share RNTI, the plurality of terminals detect the same DCI on common frequency domain resources; meanwhile, in NR, the complexity and capability of the terminal to detect the PDCCH need to be considered, and the DCI size (which may be expressed as size) needs to be aligned. After a scheduling mechanism of terminal shared RNTI is introduced, how to determine DCI size is a problem to be solved urgently at present.
Disclosure of Invention
In order to solve the related technical problem, embodiments of the present application provide a DCI size determining method, apparatus, terminal, and storage medium.
The technical scheme of the embodiment of the application is realized as follows:
the embodiment of the application provides a DCI size determining method, which is applied to a terminal and comprises the following steps:
determining the size of a DCI format of the first RNTI scrambled CRC and the sizes of other DCI formats; the total number of different DCI sizes detected by the terminal is not more than 4, and the total number of the DCI sizes of different cell radio network temporary identifications C-RNTIs and the DCI size of the first RNTI is not more than 3; wherein,
the first RNTI is shared by a plurality of terminals; the other DCI formats are used to schedule a physical shared channel.
In the foregoing solution, the determining the size of the DCI format with the first RNTI scrambling CRC and the sizes of other DCI formats includes:
determining the size of a DCI format of the first RNTI scrambled CRC; and determining the sizes of other DCI formats by adopting a predefined method so as to ensure that the total number of different DCI sizes detected by the terminal is not more than 4, and the total number of the DCI sizes of different C-RNTIs and the DCI size of the first RNTI is not more than 3.
In the foregoing scheme, the determining the size of the DCI format of the first RNTI-scrambled CRC includes one of:
determining the size of a DCI format of the first RNTI scrambled CRC according to the size of an initial downlink bandwidth part (BWP) or CORESET 0;
receiving the size of a DCI format of a first RNTI scrambled CRC configured by a network side;
determining the size of a DCI format of the first RNTI scrambled CRC according to the size of the first frequency domain resource; and the first frequency domain resource is used for the terminal to receive a Physical Downlink Shared Channel (PDSCH) bearing multicast and/or multicast service.
In the foregoing solution, the size of the DCI format of the first RNTI scrambled CRC configured by the receiving network side includes:
and receiving the size of the DCI format of the first RNTI scrambled CRC configured by the network side through high-layer signaling.
In the foregoing solution, the determining the sizes of other DCI formats by using a predefined method so as to satisfy that the total number of different DCI sizes detected by the terminal is not more than 4, and the total number of DCI sizes of different C-RNTIs and DCI size of the first RNTI is not more than 3 includes:
determining the size of DCI format 0_0, the size of DCI format 1_0, the size of DCI format 0_2 and the size of DCI format 1_ 2;
and when the total number of the detected different DCI sizes does not exceed 4 and the total number of the DCI sizes of the different C-RNTIs and the DCI size of the first RNTI does not exceed 3, finishing the DCI size calibration.
In the foregoing solution, the determining the sizes of other DCI formats by using a predefined method so that the total number of different DCI sizes detected by the terminal does not exceed 4, and the total number of the DCI sizes of different C-RNTIs and the DCI size of the first RNTI does not exceed 3 includes:
determining the size of DCI format 0_0, the size of DCI format 1_0, the size of DCI format 0_2 and the size of DCI format 1_ 2;
when the total number of the different DCI sizes not satisfying detection does not exceed 4, and/or the total number of the DCI sizes of the different C-RNTIs and the DCI size of the first RNTI does not exceed 3, performing one of the following operations:
aligning a size of DCI format 0_2 and a size of DCI format 1_2 with a size of a DCI format of the first RNTI-scrambled CRC;
the size of DCI format 0_1 and the size of DCI format 1_1 are aligned with the size of the DCI format of the first RNTI-scrambled CRC.
In the foregoing solution, the determining the sizes of other DCI formats by using a predefined method so as to satisfy that the total number of different DCI sizes detected by the terminal is not more than 4, and the total number of DCI sizes of different C-RNTIs and DCI size of the first RNTI is not more than 3 includes:
determining the size of DCI format 0_0, the size of DCI format 1_0, the size of DCI format 0_2 and the size of DCI format 1_ 2; the size of DCI format 0_2 is the same as that of DCI format 1_ 2; the size of DCI format 0_1 is the same as the size of DCI format 1_ 1;
and when the total number of the different DCI sizes which do not meet the detection does not exceed 4 and/or the total number of the DCI sizes of the different C-RNTIs and the DCI size of the first RNTI does not exceed 3, aligning two DCI format sizes with smaller absolute values among the absolute values of the size of the DCI format 0_2 and the difference between the size of the DCI format 1_2 and the size of the DCI format of the first RNTI, the size of the DCI format 0_1 and the difference between the size of the DCI format 1_1 and the size of the DCI format of the first RNTI with the size of the first RNTI scrambled CRC.
In the foregoing solution, the determining the sizes of other DCI formats by using a predefined method so as to satisfy that the total number of different DCI sizes detected by the terminal is not more than 4, and the total number of DCI sizes of different C-RNTIs and DCI size of the first RNTI is not more than 3 includes:
determining the size of DCI format 0_0, the size of DCI format 1_0, the size of DCI format 0_2 and the size of DCI format 1_ 2;
when the total number of different DCI sizes which do not meet the detection does not exceed 4 and/or the total number of DCI sizes of different C-RNTIs and the DCI size of the first RNTI does not exceed 3, performing at least one of the following operations:
aligning the size of the DCI format 1_2 with the size of the DCI format of the first RNTI-scrambled CRC;
aligning the size of DCI format 0_2 with the size of DCI format of the first RNTI-scrambled CRC, or aligning the size of DCI format 0_2 with the size of DCI format 1_ 2;
aligning the size of the DCI format 1_1 with the size of the DCI format of the first RNTI scrambled CRC;
the size of DCI format 0_1 is aligned with the size of DCI format of the first RNTI-scrambled CRC, or the size of DCI format 0_1 is aligned with the size of DCI format 1_ 1.
In the above scheme, aligning the size of the corresponding DCI format with the size of the DCI format with the first RNTI scrambled CRC includes:
and when the size of the corresponding DCI format is smaller than that of the DCI format of the first RNTI scrambled CRC, filling bits in the corresponding DCI format, so that the size of the corresponding DCI format is the same as that of the DCI format of the first RNTI scrambled CRC.
In the foregoing scheme, aligning the size of the corresponding DCI format with the size of the DCI format of the first RNTI-scrambled CRC includes:
and when the size of the corresponding DCI format is larger than that of the DCI format of the first RNTI scrambled CRC, reducing the length of a frequency domain resource allocation domain in the corresponding DCI format, so that the size of the corresponding DCI format is the same as that of the DCI format of the first RNTI scrambled CRC.
In the above scheme, the resource allocation type 1 frequency domain resource allocation indication field in the corresponding DCI format includes a Resource Indication Value (RIV); the RIV value corresponds to a starting physical resource block RBstartAnd continuously allocated resource block length LRBs(ii) a Wherein the RIV value is calculated as follows:
if it is not
Figure BDA0002898216430000041
Then RIV ═ N (L'RBs-1)+RB′start(ii) a Otherwise RIV ═ N (N-L'RBs+1)+(N-N-RB′start) (ii) a Wherein,
Figure BDA0002898216430000042
n represents the size of the first frequency domain resource or satisfies
Figure BDA0002898216430000043
A value of (d); l2 represents the bit length of the resource allocation type 1 frequency domain resource allocation field in the corresponding DCI format after reduction; k is an integer.
In the above scheme, K satisfies one of the following conditions:
Figure BDA0002898216430000044
Figure BDA0002898216430000045
Figure BDA0002898216430000051
wherein L1 denotes a bit length of a resource allocation type 1 frequency domain resource allocation field in the corresponding DCI format before reduction; n is a radical of hydrogen1Indicating the size of the active BWP or the downlink initial BWP; n is a radical of hydrogen2Representing the size of the first frequency domain resource.
In the above solution, the resource allocation type 0 frequency domain resource allocation indication field in the corresponding DCI format is used to indicate a Resource Block Group (RBG) allocated for a terminal,
each of the X1 bits corresponds to
Figure BDA0002898216430000052
Each bit of the RBG, X2 bits corresponds to
Figure BDA0002898216430000053
Each RBG;
wherein,
l3 ═ X1+ X2; l3 represents the bit length of the resource allocation type 0 frequency domain resource allocation field indication field in the corresponding DCI format after reduction; l4 denotes a bit length of a resource allocation type 0 frequency domain resource allocation field indication field in the corresponding DCI format before reduction.
An embodiment of the present application further provides a device for determining a DCI size, including:
a determining unit, configured to determine a size of a DCI format of the first RNTI-scrambled CRC and sizes of other DCI formats; the total number of different DCI sizes detected by the terminal is not more than 4, and the total number of the DCI sizes of different C-RNTIs and the DCI size of the first RNTI is not more than 3; wherein,
the first RNTI is shared by a plurality of terminals; the other DCI formats are used to schedule a physical shared channel.
An embodiment of the present application further provides a terminal, including: a communication interface and a processor; wherein,
the processor is used for determining the size of the DCI format of the first RNTI scrambled CRC and the sizes of other DCI formats; the total number of different DCI sizes detected by the terminal is not more than 4, and the total number of the DCI sizes of different C-RNTIs and the DCI size of the first RNTI is not more than 3; wherein,
the first RNTI is shared by a plurality of terminals; the other DCI formats are used to schedule a physical shared channel.
An embodiment of the present application further provides a terminal, including: a processor and a memory for storing a computer program capable of running on the processor,
wherein the processor is configured to perform the steps of any of the above methods when running the computer program.
Embodiments of the present application further provide a storage medium, on which a computer program is stored, where the computer program implements the steps of any one of the above methods when executed by a processor.
The method, the device, the terminal and the storage medium for determining the DCI size provided by the embodiment of the application determine the size of the DCI format with the first RNTI scrambled CRC and the sizes of other DCI formats; the total number of different DCI sizes detected by the terminal is not more than 4, and the total number of the DCI sizes of different C-RNTIs and the DCI size of the first RNTI is not more than 3; wherein the first RNTI is shared by a plurality of terminals; the other DCI formats are used to schedule a physical shared channel. In the embodiment of the application, the size of the DCI format of the RNTI scrambled CRC shared by a plurality of terminals is determined, and the sizes of other DCI formats are determined, so that the total number of different DCI sizes detected by the terminals is not more than 4, and the total number of the DCI sizes of different C-RNTIs and the DCI size of the first RNTI is not more than 3, thereby realizing the determination of the DCI size after introducing a scheduling mechanism of the RNTI shared by the terminals.
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Fig. 1 is a flowchart illustrating a method for determining a DCI size according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of a DCI size determining apparatus according to an embodiment of the present application;
fig. 3 is a schematic structural diagram of a communication node according to an embodiment of the present application.
Detailed Description
The present application will be described in further detail with reference to the following drawings and examples.
Flexible bandwidth part (BWP) configuration is introduced in the NR system, which can realize the benefits of multi-service multiplexing, terminal power saving, flexible resource allocation, etc. The bit length of the frequency domain resource allocation field of the scheduling DCI of NR (e.g., formats 0_0,0_1,0_2,1_0,1_1,1_2) is related to the bandwidth size of BWP.
Meanwhile, in NR, the number of DCI sizes that the terminal can detect at most needs to be defined in consideration of the complexity and capability of the terminal to detect the PDCCH.
Currently, the terminal in NR supports multiple DCI formats, including 0_0,0_1,0_2,1_0,1_1,1_2, 2_0,2_1,2_2,2_3,2_4,2_5, and 2_ 6; among them, formats 0_0,0_1,0_2,1_0,1_1,1_2 are scheduling DCI, CRC of which may be scrambled with C-RNTI, and bit length of frequency domain resource allocation field is related to BWP size, but since BWP bandwidth sizes of different DCI formats are determined to be different, number and length of information fields in different DCI formats are also different, and DCI size alignment criteria is set in NR to ensure limitation of number of DCI sizes that can be detected by a terminal at most.
After introducing the multicast and/or broadcast technology, the network side uses one RNTI shared by a plurality of terminals, for example, a PDCCH CRC-scrambled with a group RNTI (G-RNTI) to schedule a PDSCH carrying corresponding multicast and/or broadcast traffic. If the active BWP sizes of multiple terminals are not exactly the same and the network side wants to implement multiple terminals to detect and receive the same PDCCH and PDSCH, the terminals must transmit in a common frequency domain location. According to the related art DCI format design approach, the size of the frequency domain resource allocation field in the DCI format is directly related to the bandwidth size of the active BWP. Therefore, in the PDSCH scheduling scheme using a PDCCH shared by multiple terminals in the multicast/broadcast technology, multiple terminals want to detect the same DCI on a common frequency domain resource, and this DCI size is related to the common frequency domain resource and is independent of the active BWP size of the terminal. However, the DCI size for unicast service scheduling of a terminal (i.e. the size of the DCI format for the C-RNTI scrambled CRC) is related to the active BWP of the terminal itself, and the DCI size for unicast service scheduling of each terminal (i.e. the DCI size of the C-RNTI) is different, it is necessary to ensure that the introduction of the DCI for RNTI (G-RNTI) shared by the terminals does not exceed the DCI size limit of the terminal, and at the same time, it is necessary to ensure that the DCI sizes of the shared RNTIs (G-RNTIs) of multiple terminals are the same.
Therefore, if the multicast/broadcast scheduling scheme of the shared PDCCH and the shared PDSCH is adopted in NR, the current DCI size alignment method needs to be extended, so that the DCI size limitation of each terminal is satisfied, and the DCI sizes of shared RNTIs (G-RNTIs) of multiple terminals detected by multiple terminals are the same.
Based on this, in various embodiments of the present application, the size of the DCI format of the first RNTI-scrambled CRC and the sizes of the other DCI formats are determined; the total number of different DCI sizes detected by the terminal is not more than 4, and the total number of the DCI sizes of different C-RNTIs and the DCI size of the first RNTI is not more than 3; wherein,
the first RNTI is shared by a plurality of terminals; the other DCI formats are used to schedule a physical shared channel.
In the embodiment of the application, the size of the DCI format of the RNTI scrambled CRC shared by a plurality of terminals is determined, and the sizes of other DCI formats are determined, so that the total number of different DCI sizes detected by the terminals is not more than 4, and the total number of the DCI sizes of different C-RNTIs and the DCI size of the first RNTI is not more than 3, thereby realizing the determination of the DCI size after introducing a scheduling mechanism of the RNTI shared by the terminals.
The embodiment of the application provides a DCI size determining method, which is applied to a terminal and comprises the following steps:
determining the size of a DCI format of the first RNTI scrambled CRC and the sizes of other DCI formats; the total number of different DCI sizes detected by the terminal is not more than 4, and the total number of the DCI sizes of different C-RNTIs and the DCI size of the first RNTI is not more than 3; wherein,
the first RNTI is shared by a plurality of terminals; the other DCI formats are used to schedule a physical shared channel.
In practical application, the terminal may be referred to as User Equipment (UE) or user.
In practical application, the scheme of the embodiment of the present application may also be applied to a network device, specifically, a base station.
When applied to a network device, the network device determines the size of the DCI format of the first RNTI scrambled CRC and the sizes of other DCI formats; the total number of different DCI sizes transmitted to the terminal by the network equipment is not more than 4, and the total number of the DCI sizes of different C-RNTIs and the DCI size of the first RNTI is not more than 3.
The first RNTI may be a Group RNTI (G-RNTI). The first RNTI is shared by a plurality of terminals, namely the same G-RNTI is configured for the plurality of terminals. The DCI of the first RNTI-scrambled CRC is used to schedule multicast and/or broadcast traffic or the scheduled PDSCH is shared by a plurality of terminals.
The DCI in which the CRC is scrambled by the first RNTI may be referred to as DCI associated with the first RNTI, and may be referred to as DCI of the first RNTI.
The size of the DCI format of the first RNTI scrambled CRC may also be referred to as the DCI size of the first RNTI.
In practical application, in order to ensure that the DCI sizes of the first RNTIs of the multiple terminals detected by the multiple terminals are the same, and also ensure that the total number of the different DCI sizes detected by the terminals does not exceed 4, and the total number of the DCI sizes of the different C-RNTIs and the DCI size of the first RNTI does not exceed 3, it is necessary to first determine the size of the DCI format where the first RNTI scrambles the CRC, and then determine the sizes of the other DCI formats in other manners.
Based on this, in one embodiment, as shown in fig. 1, the method includes:
step 101: determining the size of a DCI format of the first RNTI scrambled CRC;
step 102: and determining the sizes of other DCI formats by adopting a predefined method so as to ensure that the total number of different DCI sizes detected by the terminal is not more than 4, and the total number of the DCI sizes of different C-RNTIs and the DCI size of the first RNTI is not more than 3.
When the embodiment of the present application is applied to a terminal, the specific implementation of step 101 may include:
determining the size of the DCI format of the first RNTI scrambled CRC according to the initial DL BWP or CORESET 0 size;
receiving the size of a DCI format of a first RNTI scrambled CRC configured by a network side;
determining the size of a DCI format of the first RNTI scrambled CRC according to the size of the first frequency domain resource; the first frequency domain resource is used for the terminal to receive a PDSCH carrying multicast and/or multicast services, and may also be referred to as a first frequency domain resource used for the terminal to receive a PDSCH scheduled by a DCI format of a first RNTI scrambled CRC.
The size of the DCI format of the first RNTI-scrambled CRC is determined according to the initial DL BWP or CORESET 0 size, and this method can achieve that the size of the DCI format of the first RNTI-scrambled CRC is the same as the size of DCI format 1_0 in the Common Search Space (CSS).
In practical application, when the network side configures the size of the DCI format of the first RNTI scrambled CRC to the terminal, since the network side configures the size of the DCI format, the influence of the sizes of other DCI formats is considered for the terminal, and thus, for the terminal, the influence of the sizes of other DCI formats can be avoided.
Based on this, in an embodiment, the size of the DCI format of the first RNTI scrambling CRC configured by the receiving network side includes:
and receiving the size of the DCI format of the first RNTI scrambled CRC configured by the network side through high-layer signaling.
That is, the size of the DCI format of the first RNTI scrambled CRC is configured through higher layer signaling.
Here, in practical applications, the higher layer signaling may be system message block (SIB), Radio Resource Control (RRC) signaling, or medium access control element (MAC CE).
When the embodiment of the application is applied to a network device, the determining the size of the DCI format of the first RNTI scrambled CRC includes one of:
determining the size of the DCI format of the first RNTI scrambled CRC according to the initial DL BWP or CORESET 0 size;
and determining the size of the DCI format of the first RNTI scrambled CRC according to the size of the first frequency domain resource.
In step 102, a procedure of aligning the size of DCI of other RNTIs (such as DCI format of C-RNTI scrambled CRC) with the size of DCI format of first RNTI scrambled CRC may be added on the basis of the related art DCI size alignment procedure.
Specifically, the size of DCI format 0_0, the size of DCI format 1_0, the size of DCI format 0_2, and the size of DCI format 1_2 are determined; the size of DCI format 0_2 is the same as that of DCI format 1_ 2; the size of DCI format 0_1 is the same as the size of DCI format 1_ 1; when the total number of the different DCI sizes meeting the detection requirement does not exceed 4, and the total number of the DCI sizes of the different C-RNTIs and the DCI size of the first RNTI does not exceed 3, finishing the DCI size calibration; wherein,.
When the total number of different DCI sizes which do not meet the detection does not exceed 4 and the total number of the DCI sizes of different C-RNTIs and the DCI size of the first RNTI does not exceed 3, aligning the size of the DCI format 0_2 and the size of the DCI format 1_2 with the size of the DCI format of the first RNTI scrambled CRC in a predefined mode; the size of DCI format 0_2 and DCI format 1_2 may be the same before alignment (i.e., before adjustment), or the size of DCI format 0_1 and DCI format 1_1 are aligned with the size of the DCI format of the first RNTI-scrambled CRC; the size of DCI format 0_1 and the size of DCI format 1_1 before alignment may be the same.
Of course, the size of DCI format 0_2 and DCI format 1_2 may be selected according to a rule, or the sizes of DCI format 0_1 and DCI format 1_1 may be selected to be aligned with the size of the DCI format of the first RNTI-scrambled CRC.
Based on this, in an embodiment, when the total number of different DCI sizes not satisfying detection does not exceed 4, and the total number of DCI sizes of different C-RNTIs and DCI sizes of first RNTIs does not exceed 3, two DCI format sizes with smaller absolute values among the size of DCI format 0_2 and the absolute value of the difference between the size of DCI format 1_2 and the size of DCI format of first RNTI, the size of DCI format 0_1 and the absolute value of the difference between the size of DCI format 1_1 and the size of DCI format of first RNTI are aligned with the size of DCI format of first RNTI-scrambled CRC.
Exemplarily, assuming that the size of DCI format 0_2 and the size of DCI format 1_2 are both L1, the size of DCI format 0_1 and the size of DCI format 1_1 are both L2, the size of DCI format of first RNTI-scrambled CRC is L3, and the size of the smaller two DCI formats of | L3-L1| and | L3-L2| are aligned with L3, for example, L1 ═ 12, L2 ═ 10, and L3 ═ 13, then the size of DCI format 0_2 and the size of DCI format 1_2 are aligned with L3.
In step 102, the DCI size alignment procedure of the related art may be changed.
Specifically, the size of DCI format 0_0, the size of DCI format 1_0, the size of DCI format 0_2, and the size of DCI format 1_2 are determined;
when the total number of different DCI sizes which do not meet the detection does not exceed 4 and/or the total number of DCI sizes of different C-RNTIs and the DCI size of the first RNTI does not exceed 3, performing at least one of the following operations:
aligning the size of the DCI format 1_2 with the size of the DCI format of the first RNTI-scrambled CRC;
aligning the size of DCI format 0_2 with the size of a DCI format of a first RNTI-scrambled CRC, or aligning the size of DCI format 0_2 with the size of DCI format 1_ 2;
aligning the size of the DCI format 1_1 with the size of the DCI format of the first RNTI scrambled CRC;
the size of DCI format 0_1 is aligned with the size of a DCI format of the first RNTI-scrambled CRC, or the size of DCI format 0_1 is aligned with the size of DCI format 1_ 1.
The size of the DCI formats 0_2,1_ 2, 0_1, and 1_1 refers to: the size of the RNTI scrambled DCI formats 0_2,1_ 2, 0_1, 1_1 other than the first RNTI, for example, may be the size of DCI formats 0_2,1_ 2, 0_1, 1_1 scrambled CRC by the C-RNTI.
In an embodiment, aligning the size of the respective DCI format with the size of the DCI format of the first RNTI-scrambled CRC comprises:
and when the size of the corresponding DCI format is smaller than that of the DCI format of the first RNTI scrambled CRC, filling bits in the corresponding DCI format, so that the size of the corresponding DCI format is the same as that of the DCI format of the first RNTI scrambled CRC.
When the size of the corresponding DCI format is larger than that of the DCI format of the first RNTI scrambled CRC, the length of a frequency domain resource allocation domain in the corresponding DCI format is reduced, so that the size of the corresponding DCI format is the same as that of the DCI format of the first RNTI scrambled CRC, and more frequency domain resources can be indicated by the limited DCI bits by using a scaling mode of the frequency domain resource allocation domain.
Specifically, in an embodiment, the resource allocation type 1 frequency domain resource allocation indication field in the corresponding DCI format includes an RIV; the RIV value corresponds to a starting physical resource block RBstartAnd continuously allocated resource block length LRBs(ii) a Wherein the RIV value is calculated as follows:
if it is not
Figure BDA0002898216430000121
Then RIV ═ N (L'RBs-1)+RB′start(ii) a Otherwise RIV ═ N (N-L'RBs+1)+(N-1-RB′start) (ii) a Wherein,
Figure BDA0002898216430000122
n represents the size of the first frequency domain resource or satisfies
Figure BDA0002898216430000123
A value of (d); l2 represents the bit length of the resource allocation type 1 frequency domain resource allocation field in the corresponding DCI format after reduction; k is an integer, in particular a positive integer.
Wherein K satisfies at least one of the following conditions:
Figure BDA0002898216430000124
Figure BDA0002898216430000125
Figure BDA0002898216430000126
wherein L1 denotes a bit length of a resource allocation type 1 frequency domain resource allocation field in the corresponding DCI format before reduction; n is a radical of1Indicating the size of the active BWP or the downlink initial BWP; n is a radical of2Representing the size of the first frequency domain resource.
Wherein,
Figure BDA0002898216430000127
which means that the rounding-up is performed,
Figure BDA0002898216430000128
indicating a rounding down.
In one embodiment, the resource allocation type 0 frequency domain resource allocation indication field in the corresponding DCI format is used for indicating an RBG allocated for a terminal,
each of the X1 bits corresponds to
Figure BDA0002898216430000129
Each bit of the RBG, X2 bits corresponds to
Figure BDA0002898216430000131
Each RBG;
wherein,
l3 ═ X1+ X2; l3 represents the bit length of the resource allocation type 0 frequency domain resource allocation field indication field in the corresponding DCI format after reduction; l4 denotes a bit length of the resource allocation type 0 frequency domain resource allocation field indication field in the corresponding DCI format before reduction.
In the DCI size determining method provided in the embodiment of the present application, a terminal determines a DCI format size of a first RNTI scrambled CRC and sizes of other DCI formats; the total number of different DCI sizes detected by the terminal is not more than 4, and the total number of the DCI sizes of different C-RNTIs and the DCI size of the first RNTI is not more than 3; wherein the first RNTI is shared by a plurality of terminals; the other DCI formats are used to schedule a physical shared channel. In the embodiment of the application, the size of the DCI format of the RNTI scrambled CRC shared by a plurality of terminals is determined, and the sizes of other DCI formats are determined, so that the total number of different DCI sizes detected by the terminals is not more than 4, and the total number of the DCI sizes of different C-RNTIs and the DCI size of the first RNTI is not more than 3, thereby realizing the determination of the DCI size after introducing a scheduling mechanism of the RNTI shared by the terminals.
The present application will be described in further detail with reference to the following application examples.
In the application embodiment, the procedure of determining the DCI size is described from the perspective of the terminal.
In an application embodiment, the terminal may determine the size of the DCI format of the first RNTI-scrambled CRC by one of the following methods:
the size of the DCI format of the predefined first RNTI scrambled CRC is the same as the load size of the DCI format 1_0 detected in the CSS;
determining the size of a DCI format of the first RNTI scrambled CRC according to the size of the first frequency domain resource;
and determining the size of the DCI format of the first RNTI scrambled CRC according to the configuration of the high-layer signaling.
Application embodiment 1
In this application embodiment, a process of aligning the sizes of the DCI of other RNTIs (for example, the DCI format of the C-RNTI scrambled CRC) and the DCI format of the first RNTI scrambled CRC is added on the basis of the DCI size alignment manner in the related art.
The basic idea is as follows: on the basis of a DCI size alignment mode in the related art, if the total number of different DCI sizes detected by a terminal does not exceed 4 and the total number of the DCI sizes of different C-RNTIs and the DCI size of a first RNTI does not exceed 3, stopping the DCI size alignment process; otherwise, the sizes of DCI formats 0_2 and 1_2 or the sizes of DCI formats 0_1 and 1_1 are aligned with the DCI size of the first RNTI, so that they are the same.
Specifically, if the terminal needs to detect both DCI formats 0_2 and 1_2 and DCI formats 0_1 and 1_1, it is predefined to adjust the sizes of DCI formats 0_2 and 1_2 to be the same as the DCI of the first RNTI, or adjust the sizes of DCI formats 0_1 and 1_1 to be the same as the DCI of the first RNTI;
the size of the DCI format having a smaller absolute value among the absolute values of the differences between the sizes of DCI formats 0_2 and 1_2 and the DCI size of the first RNTI and the absolute values of the differences between the sizes of DCI formats 0_1 and 1_1 and the DCI size of the first RNTI may be adjusted to be the same as the DCI size of the first RNTI.
The process of determining the DCI size in the present embodiment includes:
step (Step) 0: determining the size of CSS DCI format 0_0 according to the initial uplink BWP (initial UL BWP) size; determining the size of CSS DCI format 1_0 according to initial DL BWP or CORESET 0 size; and making the sizes of CSS DCI format 0_0 and DCI format 1_0 the same;
step 1: determining the size of a UE-Specific Search Space (USS) DCI format 0_0 according to an activated uplink BWP (active UL BWP); determining the size of the USS DCI format 1_0 according to active DL BWP; and the sizes of USS DCI format 0_0 and DCI 1_0 format are made the same;
step 2: determining the size of the USS DCI format 0_ 1; determining the size of the USS DCI format 1_ 1; if the DCI format 0_1 is the same as the DCI format 0_0/1_0 of the USS, filling one bit 0 in the DCI format 0_ 1; if the DCI format 1_1 is the same as the DCI format 0_0/1_0 of the USS, filling one bit 0 in the DCI format 1_ 1;
step 2A: determining the size of the USS DCI format 0_ 2; determining the size of the USS DCI format 1_ 2;
step 2B: the DCI size of the first RNTI is determined.
Here, step 2 to step 2B are executed in order in actual application; specifically, selecting at least part of step 2 through step 2B is performed in order according to the terminal detecting the DCI format.
Step 3: if the total number of the different DCI sizes detected by the terminal does not exceed 4 and the total number of the DCI sizes of the different C-RNTIs and the DCI size of the first RNTI does not exceed 3, finishing the DCI size alignment process;
step 4: if not, then,
step 4A: remove the padding bits (if any) in step 2; determining the size of USS DCI format 0_0 according to initial UL BWP size; determining the size of USS DCI format 1_0 according to initial DL BWP or CORESET 0 size; and the sizes of USS DCI format 0_0 and DCI format 1_0 are made the same;
step 4B: if the total number of different DCI sizes detected by the terminal exceeds 4, or the total number of the DCI sizes of different C-RNTIs and the DCI size of the first RNTI exceeds 3, the sizes of DCI format 0_2 and format 1_2 are the same;
step 4C: if the total number of different DCI sizes detected by the terminal exceeds 4, or the total number of the DCI sizes of different C-RNTIs and the DCI size of the first RNTI exceeds 3, enabling the sizes of DCI format 0_1 and DCI format 1_1 to be the same;
and Step 4D, if the total number of the different DCI sizes detected by the terminal exceeds 4, or the total number of the DCI sizes of the different C-RNTIs and the DCI size of the first RNTI exceeds 3, enabling the sizes of the DCI formats 0_2 and 1_2 or the sizes of the DCI formats 0_1 and 1_1 to be the same as the DCI size of the first RNTI.
Here, step 4 to step 4D may be performed in order.
In the above process, as long as the total number of different DCI sizes detected by the terminal does not exceed 4, and the total number of DCI sizes of different C-RNTIs and DCI size of the first RNTI does not exceed 3, the DCI size alignment process is stopped.
It should be noted that: the size of the DCI format 0_0,0_1,0_2,1_0,1_1,1_2 in the step refers to the size of the RNTI (e.g., C-RNTI) scrambled DCI format 0_0,0_1,0_2,1_0,1_1,1_2 other than the first RNTI.
Application example two
In the embodiment of the present application, the DCI size alignment procedure of the related art is changed.
The basic idea is as follows: the DCI size alignment process of the related technology is changed, if the total number of different DCI sizes detected by the terminal does not exceed 4 and the total number of the DCI sizes of different C-RNTIs and the DCI size of the first RNTI does not exceed 3, the DCI size alignment process is stopped; otherwise, the size of the DCI format 1_2 is aligned with the DCI size of the first RNTI. If the total number of the different DCI sizes detected by the terminal does not exceed 4 and the total number of the DCI sizes of the different C-RNTIs and the DCI size of the first RNTI does not exceed 3, stopping the DCI size alignment process; otherwise, aligning the size of the DCI format 0_2 with the DCI size of the first RNTI or aligning the size of the DCI format 0_2 with the size of the DCI format 1_ 2; if the total number of the different DCI sizes detected by the terminal does not exceed 4 and the total number of the DCI sizes of the different C-RNTIs and the DCI size of the first RNTI does not exceed 3, stopping the DCI size alignment process; otherwise, the size of the DCI format 1_1 is aligned with the DCI size of the first RNTI. If the total number of the different DCI sizes detected by the terminal does not exceed 4 and the total number of the DCI sizes of the different C-RNTIs and the DCI size of the first RNTI does not exceed 3, stopping the DCI size alignment process; otherwise, the DCI size of the first RNTI of the size of DCI format 0_1 is aligned, or the size of DCI format 0_1 and the size of DCI format 1_1 are aligned.
The process of determining the DCI size in the present embodiment includes:
step 0: determining the size of CSS DCI format 0_0 according to initial UL BWP size; determining the size of CSS DCI format 1_0 according to initial DL BWP or CORESET 0 size; and making the sizes of CSS DCI format 0_0 and DCI format 1_0 the same;
step 1: determining the size of USS DCI format 0_0 according to active UL BWP; determining the size of the USS DCI format 1_0 according to active DL BWP; and the sizes of the USS DCI format 0_0 and DCI 1_0 formats are made the same;
step 2: determining the size of the USS DCI format 0_ 1; determining the size of the USS DCI format 1_ 1; if the DCI format 0_1 is the same as the DCI format 0_0/1_0 of the USS, padding one bit 0 in the DCI format 0_ 1; if the DCI format 1_1 is the same as the DCI format 0_0/1_0 of the USS, filling one bit 0 in the DCI format 1_ 1;
step 2A: determining the size of the USS DCI format 0_ 2; determining the size of the USS DCI format 1_ 2;
step 2B: determining a DCI size of the first RNTI;
here, step 2 to step 2B are executed in order in actual application; specifically, selecting at least part of step 2 through step 2B is performed in order according to the DCI format detected by the terminal.
Step 3: if the total number of the different DCI sizes detected by the terminal does not exceed 4 and the total number of the DCI sizes of the different C-RNTIs and the DCI size of the first RNTI does not exceed 3, finishing the DCI size alignment process;
step 4: if not, then,
step 4A: remove the padding bits (if any) in step 2; determining the size of USS DCI format 0_0 according to initial UL BWP size; determining the size of USS DCI format 1_0 according to initial DLBWP or CORESET 0 size; and the sizes of USS DCI format 0_0 and DCI format 1_0 are made the same;
if the total number of the different DCI sizes detected by the terminal exceeds 4, or the total number of the DCI sizes of the different C-RNTIs and the DCI size of the first RNTI exceeds 3, the size of the DCI format 1_2 is the same as the size of the DCI of the first RNTI;
step 4B: if the total number of different DCI sizes detected by the terminal exceeds 4, or the total number of the DCI sizes of different C-RNTIs and the DCI size of the first RNTI exceeds 3, the sizes of DCI format 0_2 and format 1_2 are made to be the same, or the size of DCI format 0_2 and the size of DCI of the first RNTI are made to be the same;
and Step 4C-0, if the total number of the different DCI sizes detected by the terminal exceeds 4, or the total number of the DCI sizes of the different C-RNTIs and the DCI size of the first RNTI exceeds 3, enabling the size of the DCI format 1_1 to be the same as the size of the DCI of the first RNTI.
Step 4C: and if the total number of different DCI sizes detected by the terminal exceeds 4, or the total number of the DCI sizes of different C-RNTIs and the DCI size of the first RNTI exceeds 3, making the sizes of DCI format 0_1 and format 1_1 the same, or making the size of DCI format 0_1 and the size of DCI of the first RNTI the same.
step 4 to step 4C may be performed in order.
In the above process, as long as the total number of different DCI sizes detected by the terminal does not exceed 4, and the total number of DCI sizes of different C-RNTIs and DCI size of the first RNTI does not exceed 3, the DCI size alignment process is stopped.
It should be noted that: the size of the DCI format 0_0,0_1,0_2,1_0,1_1,1_2 in the step refers to the size of the DCI format 0_0,0_1,0_2,1_0,1_1,1_2 scrambled by another RNTI (e.g., C-RNTI) other than the first RNTI.
Application example three
In the present application embodiment, it is described how to align the respective DCI formats 0_1,0_2,1_1,1_2 with the size of the DCI format of the first RNTI-scrambled CRC.
If the size of the DCI format 0_2/1_2/_1/1_1 is smaller than the DCI size associated with the first RNTI, bits are padded in the DCI format 0_2/1_2/_1/1_1 so that the last size is the same.
If the size of the DCI format 0_2/1_2/_1/1_1 is larger than the DCI size associated with the first RNTI, the length of the frequency domain resource allocation field in the DCI format 0_2/1_2/_1/1_1 is reduced so that the final size is the same.
Specifically, for resource allocation type 1 (english can be expressed as resource allocation type 1): the RIV value contained in the frequency domain resource allocation domain corresponds to the starting PRB RBstartAnd continuously allocated resource block length LRBs(ii) a Wherein, if
Figure BDA0002898216430000181
Then RIV ═ N (L'RBs-1)+RB′start(ii) a Otherwise RIV ═ N (N-L'RBs+1)+(N-1-RB′start) (ii) a Wherein,
Figure BDA0002898216430000182
n represents the size of the first frequency domain resource or satisfies
Figure BDA0002898216430000183
A value of (d); l2 represents the bit length of the resource allocation type 1 frequency domain resource allocation field in the corresponding DCI format after being reduced; k is an integer.
Wherein K satisfies at least one of the following conditions:
Figure BDA0002898216430000184
Figure BDA0002898216430000185
Figure BDA0002898216430000186
wherein L1 is the length of the frequency domain resource allocation field in the original DCI format 0_2/1_2/_1/1_1 or the bit length for indicating the resource allocation of resource allocation type 1, that is, L1 represents the length of the frequency domain resource allocation field in the corresponding DCI format before reduction or the bit length of the frequency domain resource allocation field of resource allocation type 1; n is a radical of1Indicating the size of the active BWP or the downlink initial BWP; n is a radical of2Representing a size of the first frequency domain resource; l2 is the length of the frequency domain resource allocation field after the DCI size alignment associated with the first RNTI is completed or the bit length for indicating the resource allocation of resource allocation type 1, that is, L2 denotes the length of the frequency domain resource allocation field in the corresponding DCI format after reduction or the bit length of the resource allocation type 1 frequency domain resource allocation field.
Illustratively, L1 ═ 10, L2 ═ 7, then K ═ 2 or 3, if L = calculated from RIV values indicated in DCI formats'RBsIs PRB #2, RB'startIs a 10-PRB,
the true allocated starting PRB is PRB #4 allocated length 20 PRBs (K ═ 2)
Or the true allocated starting PRB is PRB #6 allocated with a length of 30 PRBs (K — 3).
For resource allocation type 0(resource allocation type 0):
l4 is the number of RBGs indicated in the original DCI format 0_2/1_2/_1/1_1, i.e. the bit length of the resource allocation type 0 frequency domain resource allocation field indication field in the corresponding DCI format before reduction; l3 is the indicated number of RBGs (i.e. the bit length of the resource allocation indicating resource allocation type 0) after the DCI size alignment associated with the first RNTI is completed, i.e. L3 denotes the bit length of the resource allocation type 0 frequency domain resource allocation field indication field in the corresponding DCI format after reduction.
Each of the X1 bits corresponds to a respective bit
Figure BDA0002898216430000191
Each bit of the RBG, X2 bits corresponds to
Figure BDA0002898216430000192
And (4) RBG.
Wherein X1 and X2 satisfy the following formula:
L3＝X1+X2；
Figure BDA0002898216430000193
exemplarily, it is assumed that L4 is 7, i.e., the number of RBGs indicated in the original DCI format 0_2/1_2/_1/1_1 is 7.
In the case where L3 is equal to 1,2,3,4,5, and 6, respectively, the number of RBGs corresponding to each bit is as follows:
1：7RBG
2：4RBG,3RBG
3：3RBG,2RBG,2RBG
4：2RBG,2RBG,2RBG,1RBG
5：2RBG,2RBG,1RBG,1RBG,1RBG
6：2RBG,1RBG,1RBG,1RBG,1RBG,1RBG。
in order to implement the method of the embodiment of the present application, an embodiment of the present application further provides a DCI size determining apparatus, where the DCI size determining apparatus is configured to be disposed on a communication node, such as a terminal or a network device, and the DCI size determining apparatus includes:
a determining unit, configured to determine a size of a DCI format of the first RNTI-scrambled CRC and sizes of other DCI formats; the total number of different DCI sizes detected by the terminal is not more than 4, and the total number of the DCI sizes of different C-RNTIs and the DCI size of the first RNTI is not more than 3; wherein,
the first RNTI is shared by a plurality of terminals; the other DCI formats are used to schedule a physical shared channel.
Specifically, as shown in fig. 2, the apparatus may include:
a first determination subunit 201 that determines the size of the DCI format of the first RNTI-scrambled CRC;
the second determining subunit 202 determines the sizes of other DCI formats by using a predefined method, so that the total number of different DCI sizes detected by the terminal is not more than 4, and the total number of the DCI sizes of different C-RNTIs and the DCI size of the first RNTI is not more than 3.
Wherein, in an embodiment, the communication node comprises a terminal; the first determining subunit 201 is configured to:
determining the size of a DCI format of the first RNTI scrambled CRC according to the size of the initial downlink BWP or CORESET 0;
receiving the size of a DCI format of a first RNTI scrambled CRC configured by a network side;
determining the size of a DCI format of the first RNTI scrambled CRC according to the size of the first frequency domain resource; the first frequency domain resource is used for the terminal to receive the PDSCH carrying multicast and/or multicast service.
In an embodiment, the first determining subunit 201 is specifically configured to:
and receiving the size of the DCI format of the first RNTI scrambled CRC configured by the network side through high-layer signaling.
In an embodiment, the communication node comprises a network device; the first determining subunit 201 is configured to:
determining the size of a DCI format of the first RNTI scrambled CRC according to the size of the initial downlink BWP or CORESET 0;
determining the size of a DCI format of a first RNTI scrambled CRC according to the size of the first frequency domain resource; the first frequency domain resource is used for the terminal to receive the PDSCH carrying multicast and/or multicast service.
In an embodiment, the second determining subunit 202 is configured to:
determining the size of DCI format 0_0, the size of DCI format 1_0, the size of DCI format 0_2 and the size of DCI format 1_ 2;
and when the total number of the detected different DCI sizes does not exceed 4 and the total number of the DCI sizes of the different C-RNTIs and the DCI size of the first RNTI does not exceed 3, finishing the DCI size calibration.
In an embodiment, the second determining subunit 202 is configured to:
determining the size of DCI format 0_0, the size of DCI format 1_0, the size of DCI format 0_2 and the size of DCI format 1_ 2;
when the total number of the different DCI sizes not satisfying detection does not exceed 4, and/or the total number of the DCI sizes of the different C-RNTIs and the DCI size of the first RNTI does not exceed 3, performing one of the following operations:
aligning a size of DCI format 0_2 and a size of DCI format 1_2 with a size of a DCI format of the first RNTI-scrambled CRC;
the DCI format 0_1 and DCI format 1_1 sizes are aligned with the DCI format size of the first RNTI-scrambled CRC.
In an embodiment, the second determining subunit 202 is configured to:
determining the size of DCI format 0_0, the size of DCI format 1_0, the size of DCI format 0_2 and the size of DCI format 1_ 2; the size of DCI format 0_2 is the same as that of DCI format 1_ 2; the size of DCI format 0_1 is the same as the size of DCI format 1_ 1;
and when the total number of the different DCI sizes which do not meet the detection does not exceed 4 and/or the total number of the DCI sizes of the different C-RNTIs and the DCI size of the first RNTI does not exceed 3, aligning two DCI format sizes with smaller absolute values among the absolute values of the size of the DCI format 0_2 and the difference between the size of the DCI format 1_2 and the size of the DCI format of the first RNTI, the size of the DCI format 0_1 and the difference between the size of the DCI format 1_1 and the size of the DCI format of the first RNTI with the size of the first RNTI scrambled CRC.
In an embodiment, the second determining subunit 202 is configured to:
determining the size of DCI format 0_0, the size of DCI format 1_0, the size of DCI format 0_2 and the size of DCI format 1_ 2;
when the total number of different DCI sizes which do not meet the detection does not exceed 4 and/or the total number of DCI sizes of different C-RNTIs and the DCI size of the first RNTI does not exceed 3, performing at least one of the following operations:
aligning the size of the DCI format 1_2 with the size of the DCI format of the first RNTI-scrambled CRC;
aligning the size of DCI format 0_2 with the size of DCI format of the first RNTI-scrambled CRC, or aligning the size of DCI format 0_2 with the size of DCI format 1_ 2;
aligning the size of the DCI format 1_1 with the size of the DCI format of the first RNTI-scrambled CRC;
the size of DCI format 0_1 is aligned with the size of a DCI format of the first RNTI-scrambled CRC, or the size of DCI format 0_1 is aligned with the size of DCI format 1_ 1.
In an embodiment, the second determining subunit 202 is configured to:
and when the size of the corresponding DCI format is smaller than that of the DCI format of the first RNTI scrambled CRC, filling bits in the corresponding DCI format, so that the size of the corresponding DCI format is the same as that of the DCI format of the first RNTI scrambled CRC.
In an embodiment, the second determining subunit 202 is configured to:
and when the size of the corresponding DCI format is larger than that of the DCI format of the first RNTI scrambled CRC, reducing the length of a frequency domain resource allocation domain in the corresponding DCI format, so that the size of the corresponding DCI format is the same as that of the DCI format of the first RNTI scrambled CRC.
In practical application, the determining unit may be implemented by a processor in the DCI size determining device in combination with a communication interface; the first determining subunit 201 may be implemented by a processor in the DCI size determining device in conjunction with a communication interface; the second determining subunit 202 may be implemented by a processor in the DCI size determining device.
It should be noted that: in the DCI size determining apparatus provided in the above embodiment, when determining the DCI size, the above-mentioned division of each program module is merely exemplified, and in practical applications, the above-mentioned processing allocation may be completed by different program modules according to needs, that is, the internal structure of the apparatus is divided into different program modules to complete all or part of the above-mentioned processing. In addition, the DCI size determining apparatus and the DCI size determining method provided in the foregoing embodiments belong to the same concept, and specific implementation processes thereof are detailed in the method embodiments and are not described herein again.
Based on the hardware implementation of the program module, and in order to implement the method according to the embodiment of the present application, an embodiment of the present application further provides a communication node, as shown in fig. 3, where the communication node 300 includes:
the communication interface 301 can perform information interaction with other communication nodes;
and the processor 302 is connected with the communication interface 301 to implement information interaction with other communication nodes, and is used for executing the method provided by one or more technical solutions when running a computer program. And the computer program is stored on the memory 303.
Specifically, the processor is configured to determine a size of a DCI format of the first RNTI scrambled CRC and sizes of other DCI formats; the total number of different DCI sizes detected by the terminal is not more than 4, and the total number of the DCI sizes of different C-RNTIs and the DCI size of the first RNTI is not more than 3; wherein,
the first RNTI is shared by a plurality of terminals; the other DCI formats are used to schedule a physical shared channel.
Wherein, in an embodiment, the processor 302 is configured to:
determining the size of a DCI format of the first RNTI scrambled CRC;
and determining the sizes of other DCI formats by adopting a predefined method so as to ensure that the total number of different DCI sizes detected by the terminal is not more than 4, and the total number of the DCI sizes of different C-RNTIs and the DCI size of the first RNTI is not more than 3.
Wherein, in an embodiment, the communication node 300 comprises a terminal; the processor 302 is configured to:
determining the size of a DCI format of the first RNTI scrambled CRC according to the size of the initial downlink BWP or CORESET 0;
receiving the size of a DCI format of a first RNTI scrambled CRC configured on the network side through the communication interface 301;
determining the size of a DCI format of the first RNTI scrambled CRC according to the size of the first frequency domain resource; the first frequency domain resource is used for the terminal to receive the PDSCH bearing the multicast and/or multicast service.
In an embodiment, the processor 302 is specifically configured to:
and receiving the size of the DCI format of the first RNTI scrambled CRC configured on the network side through RRC signaling by using the communication interface 301.
In an embodiment, the communication node 300 comprises a network device; the processor 302 is configured to:
determining the size of a DCI format of the first RNTI scrambled CRC according to the size of the initial downlink BWP or CORESET 0;
determining the size of a DCI format of the first RNTI scrambled CRC according to the size of the first frequency domain resource; the first frequency domain resource is used for the terminal to receive the PDSCH carrying multicast and/or multicast service.
In an embodiment, the processor 302 is configured to:
determining the size of DCI format 0_0, the size of DCI format 1_0, the size of DCI format 0_2 and the size of DCI format 1_ 2;
and when the total number of the detected different DCI sizes does not exceed 4 and the total number of the DCI sizes of the different C-RNTIs and the DCI size of the first RNTI does not exceed 3, finishing the DCI size calibration.
In an embodiment, the processor 302 is configured to:
determining the size of DCI format 0_0, the size of DCI format 1_0, the size of DCI format 0_2 and the size of DCI format 1_ 2;
when the total number of different DCI sizes which do not satisfy detection does not exceed 4, and/or the total number of DCI sizes of different C-RNTIs and the DCI size of the first RNTI does not exceed 3, performing one of the following operations:
aligning the size of DCI format 0_2 and the size of DCI format 1_2 with the size of the DCI format of the first RNTI-scrambled CRC;
the sizes of the DCI format 0_1 and DCI format 1_1 sizes are aligned with the size of the DCI format of the first RNTI scrambled CRC.
In an embodiment, the processor 302 is configured to:
determining the size of DCI format 0_0, the size of DCI format 1_0, the size of DCI format 0_2 and the size of DCI format 1_ 2; the size of DCI format 0_2 is the same as the size of DCI format 1_ 2; the size of DCI format 0_1 is the same as the size of DCI format 1_ 1;
and when the total number of the different DCI sizes which do not meet the detection does not exceed 4 and/or the total number of the DCI sizes of the different C-RNTIs and the DCI size of the first RNTI does not exceed 3, aligning two DCI format sizes with smaller absolute values among the absolute values of the size of the DCI format 0_2 and the difference between the size of the DCI format 1_2 and the size of the DCI format of the first RNTI, the size of the DCI format 0_1 and the difference between the size of the DCI format 1_1 and the size of the DCI format of the first RNTI with the size of the first RNTI scrambled CRC.
In an embodiment, the processor 302 is configured to:
determining the size of DCI format 0_0, the size of DCI format 1_0, the size of DCI format 0_2 and the size of DCI format 1_ 2;
when the total number of different DCI sizes which do not meet the detection does not exceed 4 and/or the total number of DCI sizes of different C-RNTIs and the DCI size of the first RNTI does not exceed 3, performing at least one of the following operations:
aligning the size of the DCI format 1_2 with the size of the DCI format of the first RNTI-scrambled CRC;
aligning the size of DCI format 0_2 with the size of a DCI format of a first RNTI-scrambled CRC, or aligning the size of DCI format 0_2 with the size of DCI format 1_ 2;
aligning the size of the DCI format 1_1 with the size of the DCI format of the first RNTI scrambled CRC;
the size of DCI format 0_1 is aligned with the size of DCI format of the first RNTI-scrambled CRC, or the size of DCI format 0_1 is aligned with the size of DCI format 1_ 1.
In an embodiment, the processor 302 is configured to:
and when the size of the corresponding DCI format is smaller than that of the DCI format of the first RNTI scrambled CRC, filling bits in the corresponding DCI format, so that the size of the corresponding DCI format is the same as that of the DCI format of the first RNTI scrambled CRC.
Wherein, in an embodiment, the processor 302 is configured to:
and when the size of the corresponding DCI format is larger than that of the DCI format of the first RNTI scrambled CRC, reducing the length of a frequency domain resource allocation domain in the corresponding DCI format, so that the size of the corresponding DCI format is the same as that of the DCI format of the first RNTI scrambled CRC.
It should be noted that: the specific processing of the processor 302 may be understood with reference to the above-described methods.
Of course, in practice, the various components in the communication node 300 are coupled together by a bus system 304. It will be appreciated that the bus system 304 is used to enable communications among the components. The bus system 304 includes a power bus, a control bus, and a status signal bus in addition to a data bus. For clarity of illustration, however, the various buses are labeled as bus system 304 in FIG. 3.
The memory 303 in the embodiments of the present application is used to store various types of data to support the operation of the communication node 300. Examples of such data include: any computer program for operation on the communication node 300.
The method disclosed in the above embodiments of the present application may be applied to the processor 302, or implemented by the processor 302. The processor 302 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method may be implemented by integrated logic circuits of hardware or instructions in the form of software in the processor 302. The Processor 302 may be a general purpose Processor, a Digital Signal Processor (DSP), or other programmable logic device, discrete gate or transistor logic device, discrete hardware components, etc. The processor 302 may implement or perform the methods, steps, and logic blocks disclosed in the embodiments of the present application. A general purpose processor may be a microprocessor or any conventional processor or the like. The steps of the method disclosed in the embodiments of the present application may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software modules may be located in a storage medium located in the memory 303, and the processor 302 reads the information in the memory 303 and performs the steps of the aforementioned method in conjunction with its hardware.
In an exemplary embodiment, the communication node 300 may be implemented by one or more Application Specific Integrated Circuits (ASICs), DSPs, Programmable Logic Devices (PLDs), Complex Programmable Logic Devices (CPLDs), Field Programmable Gate Arrays (FPGAs), general purpose processors, controllers, Micro Controllers (MCUs), microprocessors (microprocessors), or other electronic components for performing the aforementioned methods.
It will be appreciated that the memory 303 of embodiments of the subject application can be either volatile memory or nonvolatile memory, and can include both volatile and nonvolatile memory. Among them, the nonvolatile Memory may be a Read Only Memory (ROM), a Programmable Read Only Memory (PROM), an Erasable Programmable Read-Only Memory (EPROM), an Electrically Erasable Programmable Read-Only Memory (EEPROM), a magnetic random access Memory (FRAM), a magnetic random access Memory (Flash Memory), a magnetic surface Memory, an optical Disc, or a Compact Disc Read-Only Memory (CD-ROM); the magnetic surface storage may be disk storage or tape storage. Volatile Memory can be Random Access Memory (RAM), which acts as external cache Memory. By way of illustration and not limitation, many forms of RAM are available, such as Static Random Access Memory (SRAM), Synchronous Static Random Access Memory (SSRAM), Dynamic Random Access Memory (DRAM), Synchronous Dynamic Random Access Memory (SDRAM), Double Data Rate Synchronous Dynamic Random Access Memory (DDRSDRAM), Enhanced Synchronous Dynamic Random Access Memory (ESDRAM), Enhanced Synchronous Dynamic Random Access Memory (Enhanced DRAM), Synchronous Dynamic Random Access Memory (SLDRAM), Direct Memory (DRmb Access), and Random Access Memory (DRAM). The memories described in the embodiments of the present application are intended to comprise, without being limited to, these and any other suitable types of memory.
In an exemplary embodiment, the present application further provides a storage medium, i.e. a computer storage medium, in particular a computer readable storage medium, for example comprising a memory 303 storing a computer program, which is executable by a processor 302 of a communication node 300 to perform the steps of the aforementioned method. The computer readable storage medium may be Memory such as FRAM, ROM, PROM, EPROM, EEPROM, Flash Memory, magnetic surface Memory, optical disk, or CD-ROM.
It should be noted that: "first," "second," and the like are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.
The technical means described in the embodiments of the present application may be arbitrarily combined without conflict.
The above description is only a preferred embodiment of the present application, and is not intended to limit the scope of the present application.

Claims (17)

1. A method for determining the size of Downlink Control Information (DCI) is applied to a terminal and comprises the following steps:
determining the size of a DCI format of a first Radio Network Temporary Identifier (RNTI) scrambled Cyclic Redundancy Check (CRC) and the size of other DCI formats; the total number of different DCI sizes detected by the terminal is not more than 4, and the total number of the DCI sizes of different cell radio network temporary identifications C-RNTIs and the DCI size of the first RNTI is not more than 3; wherein,
the first RNTI is shared by a plurality of terminals; the other DCI formats are used to schedule a physical shared channel.
2. The method of claim 1, wherein determining the size of the DCI format for the first RNTI-scrambled CRC and the size of the other DCI formats comprises:
determining the size of a DCI format of the first RNTI scrambled CRC; and determining the sizes of other DCI formats by adopting a predefined method so as to ensure that the total number of different DCI sizes detected by the terminal is not more than 4, and the total number of the DCI sizes of different C-RNTIs and the DCI size of the first RNTI is not more than 3.
3. The method of claim 2, wherein the determining the size of the DCI format of the first RNTI-scrambled CRC comprises one of:
determining the size of the DCI format of the first RNTI scrambled CRC according to the size of the initial downlink bandwidth part BWP or CORESET 0;
receiving the size of a DCI format of a first RNTI scrambled CRC configured by a network side;
determining the size of a DCI format of the first RNTI scrambled CRC according to the size of the first frequency domain resource; and the first frequency domain resource is used for the terminal to receive a Physical Downlink Shared Channel (PDSCH) bearing multicast and/or multicast service.
4. The method of claim 3, wherein the size of the DCI format of the first RNTI scrambled CRC configured on the receiving network side comprises:
and receiving the size of the DCI format of the first RNTI scrambled CRC configured by the network side through high-layer signaling.
5. The method of claim 2, wherein the determining the sizes of the other DCI formats by the predefined method so that the total number of different DCI sizes detected by the terminal does not exceed 4 and the total number of DCI sizes of different C-RNTIs and the DCI size of the first RNTI does not exceed 3 comprises:
determining the size of DCI format 0_0, the size of DCI format 1_0, the size of DCI format 0_2 and the size of DCI format 1_ 2;
and when the total number of the detected different DCI sizes does not exceed 4 and the total number of the DCI sizes of the different C-RNTIs and the DCI size of the first RNTI does not exceed 3, finishing the DCI size calibration.
6. The method of claim 2, wherein the determining the sizes of the other DCI formats by the predefined method so that the total number of different DCI sizes detected by the terminal does not exceed 4 and the total number of DCI sizes of different C-RNTIs and the DCI size of the first RNTI does not exceed 3 comprises:
determining the size of DCI format 0_0, the size of DCI format 1_0, the size of DCI format 0_2 and the size of DCI format 1_ 2;
when the total number of the different DCI sizes not satisfying detection does not exceed 4, and/or the total number of the DCI sizes of the different C-RNTIs and the DCI size of the first RNTI does not exceed 3, performing one of the following operations:
aligning a size of DCI format 0_2 and a size of DCI format 1_2 with a size of a DCI format of the first RNTI-scrambled CRC;
the size of DCI format 0_1 and the size of DCI format 1_1 are aligned with the size of the DCI format of the first RNTI-scrambled CRC.
7. The method of claim 2, wherein the determining the sizes of the other DCI formats by the predefined method so that the total number of different DCI sizes detected by the terminal does not exceed 4 and the total number of DCI sizes of different C-RNTIs and the DCI size of the first RNTI does not exceed 3 comprises:
determining the size of DCI format 0_0, the size of DCI format 1_0, the size of DCI format 0_2 and the size of DCI format 1_ 2; the size of DCI format 0_2 is the same as that of DCI format 1_ 2; the size of DCI format 0_1 is the same as the size of DCI format 1_ 1;
and when the total number of the different DCI sizes which do not meet the detection does not exceed 4 and/or the total number of the DCI sizes of the different C-RNTIs and the DCI size of the first RNTI does not exceed 3, aligning two DCI format sizes with smaller absolute values among the absolute values of the size of the DCI format 0_2 and the difference between the size of the DCI format 1_2 and the size of the DCI format of the first RNTI, the size of the DCI format 0_1 and the difference between the size of the DCI format 1_1 and the size of the DCI format of the first RNTI with the size of the first RNTI scrambled CRC.
8. The method of claim 2, wherein the determining the sizes of the other DCI formats by the predefined method so that the total number of different DCI sizes detected by the terminal does not exceed 4 and the total number of DCI sizes of different C-RNTIs and the DCI size of the first RNTI does not exceed 3 comprises:
determining the size of DCI format 0_0, the size of DCI format 1_0, the size of DCI format 0_2 and the size of DCI format 1_ 2;
when the total number of different DCI sizes which do not meet the detection does not exceed 4 and/or the total number of DCI sizes of different C-RNTIs and the DCI size of the first RNTI does not exceed 3, performing at least one of the following operations:
aligning the size of the DCI format 1_2 with the size of the DCI format of the first RNTI-scrambled CRC;
aligning the size of DCI format 0_2 with the size of DCI format of the first RNTI-scrambled CRC, or aligning the size of DCI format 0_2 with the size of DCI format 1_ 2;
aligning the size of the DCI format 1_1 with the size of the DCI format of the first RNTI-scrambled CRC;
the size of DCI format 0_1 is aligned with the size of DCI format of the first RNTI-scrambled CRC, or the size of DCI format 0_1 is aligned with the size of DCI format 1_ 1.
9. The method of any of claims 6 to 8, wherein aligning the size of the corresponding DCI format with the DCI format of the first RNTI-scrambled CRC comprises:
and when the size of the corresponding DCI format is smaller than that of the DCI format of the first RNTI scrambled CRC, filling bits in the corresponding DCI format, so that the size of the corresponding DCI format is the same as that of the DCI format of the first RNTI scrambled CRC.
10. The method of any of claims 6 to 8, wherein aligning the size of the respective DCI format with the DCI format of the first RNTI-scrambled CRC comprises:
when the size of the corresponding DCI format is larger than that of the DCI format of the first RNTI scrambled CRC, reducing the length of a frequency domain resource allocation domain in the corresponding DCI format, so that the size of the corresponding DCI format is the same as that of the DCI format of the first RNTI scrambled CRC.
11. The method of claim 10, wherein the resource allocation type 1 frequency domain resource allocation indication field in the corresponding DCI format contains a resource indication value RIV; the RIV value corresponds to a starting physical resource block RBstartAnd continuously allocated resource block length LRBs(ii) a Wherein the RIV value is calculated as follows: if it is used
Figure FDA0002898216420000041
Then RIV ═ N (L'RBs-1)+RB′start(ii) a Otherwise RIV ═ N (N-L'RBs+1)+(N-1-RB′start) (ii) a Wherein,
Figure FDA0002898216420000042
n represents the size of the first frequency domain resource or satisfies
Figure FDA0002898216420000043
A value of (d); l2 represents the bit length of the resource allocation type 1 frequency domain resource allocation field in the corresponding DCI format after being reduced; k is an integer.
12. The method of claim 11, wherein K satisfies one of the following conditions:
Figure FDA0002898216420000044
Figure FDA0002898216420000045
Figure FDA0002898216420000046
wherein L1 denotes a bit length of a resource allocation type 1 frequency domain resource allocation field in the corresponding DCI format before reduction; n is a radical of hydrogen1Indicating the size of the active BWP or the downlink initial BWP; n is a radical of hydrogen2Representing the size of the first frequency domain resource.
13. The method of claim 10, wherein a resource allocation type 0 frequency domain resource allocation indication field in the corresponding DCI format is used for indicating a Resource Block Group (RBG) allocated for a terminal,
each of the X1 bits corresponds to one bit
Figure FDA0002898216420000047
Each bit of the RBG, X2 bits corresponds to
Figure FDA0002898216420000048
Each RBG;
wherein,
l3 ═ X1+ X2; l3 represents the bit length of the resource allocation type 0 frequency domain resource allocation field indication field in the corresponding DCI format after reduction; l4 denotes a bit length of the resource allocation type 0 frequency domain resource allocation field indication field in the corresponding DCI format before reduction.
14. A DCI size determination apparatus, comprising:
a determining unit, configured to determine a size of a DCI format of the first RNTI-scrambled CRC and sizes of other DCI formats; the total number of different DCI sizes detected by the terminal is not more than 4, and the total number of the DCI sizes of different C-RNTIs and the DCI size of the first RNTI is not more than 3; wherein,
the first RNTI is shared by a plurality of terminals; the other DCI formats are used to schedule a physical shared channel.
15. A terminal, comprising: a communication interface and a processor; wherein,
the processor is used for determining the size of the DCI format of the first RNTI scrambled CRC and the sizes of other DCI formats; the total number of different DCI sizes detected by the terminal is not more than 4, and the total number of the DCI sizes of different C-RNTIs and the DCI size of the first RNTI is not more than 3; wherein,
the first RNTI is shared by a plurality of terminals; the other DCI formats are used to schedule a physical shared channel.
16. A terminal, comprising: a processor and a memory for storing a computer program capable of running on the processor,
wherein the processor is adapted to perform the steps of the method of any one of claims 1 to 13 when running the computer program.
17. A storage medium having a computer program stored thereon, the computer program, when being executed by a processor, performing the steps of the method of any one of claims 1 to 13.
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