CN114157397B - Method and device for determining downlink control information - Google Patents
Method and device for determining downlink control information Download PDFInfo
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- CN114157397B CN114157397B CN202111539444.9A CN202111539444A CN114157397B CN 114157397 B CN114157397 B CN 114157397B CN 202111539444 A CN202111539444 A CN 202111539444A CN 114157397 B CN114157397 B CN 114157397B
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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
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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
- H04L1/0036—Systems modifying transmission characteristics according to link quality, e.g. power backoff arrangements specific to the receiver
- H04L1/0038—Blind format detection
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
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Abstract
The embodiment of the invention provides a method and equipment for determining downlink control information, wherein the method comprises the following steps: aligning the DCI carried on a dispatching service cell, wherein the dispatching service cell is a cell carrying the cross-carrier dispatching DCI of a dispatched cell and the self-dispatching DCI of the cell.
Description
Technical Field
The embodiment of the invention relates to the technical field of communication, in particular to a method and equipment for determining downlink control information (Downlink Control Information, DCI) in a carrier aggregation (Carrier Aggregation, CA) scene.
Background
With the development of mobile communication technology, more and more technologies for improving communication efficiency are introduced. For example:
1. Regarding carrier aggregation:
In a carrier aggregation scenario, a UE (User Equipment) may configure a primary Cell PCell (PRIMARY CELL, PCELL), and a plurality of Secondary cells (scells), where a maximum of 16 cells may be supported in a New Radio (NR).
If the SCell is a self-scheduling cell (cell), both control information and data information are transmitted on the SCell, see fig. 1. If the SCell is configured for cross-carrier scheduling, control information is transmitted on other cells (e.g., PCell) and data information is transmitted on the SCell, see fig. 2.
2. Regarding search space:
the UE in NR may configure a Common search space (Common SEARCH SPACE ) and a UE-specific search space (UE-SPECIFIC SEARCH SPACE, USS).
Different DCI formats (formats) may be transmitted in CSS or USS. The CSS may transmit common information (e.g., broadcast information). Different UEs share DCI in CSS. USS transmits a single UE DCI.
Types of CSS include: type 0 (type 0), type 0A (type 0A), type1 (type 1), type2 (type 2), and type3 (type 3) types. Wherein the CSSs of type 0, type 0A, type, type2 can be configured only on the PCell, and the type 3CSS can be configured on the SCell.
Type 3CSS can be configured with: interrupt transmission-radio network temporary identity (INT-RNTI), slot format indication-radio network temporary identity (SFI-RNTI), transmit power control-physical uplink control channel-radio network temporary identity (TPC-PUCCH-RNTI), transmit power control-physical uplink shared channel-radio network temporary identity (TPC-PUSCH-RNTI), transmit power control-sounding reference signal-radio network temporary identity (TPC-SRS-RNTI), semi-persistent-channel state information-radio network temporary identity (SP-CSI-RNTI), cell radio network temporary identity (C-RNTI), or configured scheduling-radio network temporary identity (CS-RNTI) scrambled DCI. The DCI scrambled by the INT-RNTI, the SFI-RNTI, the TPC-PUCCH-RNTI, the TPC-PUSCH-RNTI, the TPC-SRS-RNTI and the SP-CSI-RNTI is not used for data scheduling, and only the DCI scrambled by the C-RNTI and the CS-RNTI is used for data scheduling.
3. Regarding DCI format:
There are eight formats in total for DCI, where DCI formats 0-1 or DCI formats 1-1 can be configured in USS. Since only type 3CSS and USS can be disposed on the SCell, DCI formats 2-0, 2-1, 2-2, 2-3, and 0-0 or 0-0 can be disposed on the CSS, and DCI formats 0-0 or 1-0, 0-1, and 1-1 can be disposed on the USS.
Wherein, the DCI formats 0-1 and 1-1 in USS may have a cross-carrier indication field (Carrier Indicator Field, CIF)), supporting cross-carrier scheduling.
4. Regarding DCI size budget (DCI size budget):
In order to reduce the complexity of UE processing, the concept of UE size budget is set in NR. I.e. the number of DCI sizes that the UE blindly detects within one slot (slot) is limited. In the NR existing protocol (agreement), a UE size budget of a single carrier or PCell is defined to be 4 DCI sizes.
It is generally assumed that the concept of a UE size budget is defined per cell (per slot per cell) per slot.
5. Numbering of DCI resource blocks (DCI RB numbering):
in NR, the coding scheme of a Resource block of a physical downlink shared channel (Physical Downlink SHARED CHANNEL, PDSCH) scheduled by a C-RNTI or CS-RNTI-scrambled DCI configured in a CSS is defined according to a lowest physical Resource block (Physical Resource Block, PRB) of a Control Resource SET (CORESET) where the DCI is located.
In the existing protocols of NR, only the DCI size budget for a single carrier or PCell is defined. If the SCell is configured, control information of the SCell needs to be scheduled, DCI of the SCell needs to be blindly checked, and at present, the DCI size budget in the carrier aggregation scene in NR is undefined, so how to determine the DCI size budget in the carrier aggregation scene is a problem to be solved.
Secondly, the increase of the DCI size budget can cause the increase of the complexity of UE implementation, if the DCI size budget is unchanged, the DCI size on the SCell may be different from the DCI size on the PCell, and under the condition that the DCI size budget is limited, the problem of how to determine the DCI size is needed, and the problem that the UE cannot accurately blindly check the DCI format of the scheduling SCell is solved.
Thirdly, when the CSS of the type 3 is configured on the SCell, the CSS of the type 3 is configured with the DCI scrambled by the C-RNTI and/or the CS-RNTI, and the DCI scrambled by the C-RNTI and/or the CS-RNTI is scheduled to be unicast data, if the DCI is determined according to the lowest PRB of CORESET where the DCI is located, the scheduling bandwidth of the DCI is limited, and the scheduling flexibility is affected.
Disclosure of Invention
An object of the embodiment of the invention is to provide a method and a device for determining downlink control information, which solve the problem of how to determine a DCI size budget.
In a first aspect, a method for determining DCI, applied to a UE or a network side device, is provided, where the method includes:
Determining a first number of secondary cell scells or a second number of cross-carrier scheduled scells;
determining a third quantity of DCI size budget of self-scheduling of a scheduling service cell, wherein the scheduling service cell is a cell bearing cross-carrier scheduling DCI of a scheduled cell and self-scheduling DCI of a cell;
Determining a fourth number of DCI size budgets for the scheduling serving cell to be increased according to the first number or the second number;
and determining the DCI size budget of the scheduling service cell according to the third quantity and the fourth quantity.
In a second aspect, there is further provided a method for determining DCI, applied to a user equipment UE or a network side device, the method including:
Aligning the DCI carried on a dispatching service cell, wherein the dispatching service cell is a cell carrying the cross-carrier dispatching DCI of a dispatched cell and the self-dispatching DCI of the cell.
In a third aspect, there is also provided a method for determining DCI, applied to a UE or a network side device, the method including:
when the UE is configured with the first CSS, determining the frequency domain resource position indicated by DCI according to the activated partial bandwidth; or alternatively
Detecting a first DCI format according to whether the UE is configured in a first CSS, and determining a DCI size;
wherein the first CSS is a CSS on PDCCH of type 3 of SCell and/or PCell;
the first DCI format refers to a DCI format of a transmit power control TPC signaling of a physical uplink control channel PUCCH or a physical uplink shared channel PUSCH or a sounding reference signal SRS.
In a fourth aspect, there is also provided a communication device comprising:
a first determining module, configured to determine a first number of secondary cell scells or a second number of cross-carrier scheduled scells;
A second determining module, configured to determine a third amount of DCI size budget for self-scheduling of a scheduling serving cell, where the scheduling serving cell is a cell carrying DCI for cross-carrier scheduling of a scheduled cell and self-scheduling DCI of a own cell;
A third determining module, configured to determine a fourth amount of the DCI size budget for the scheduling serving cell that is increased according to the first amount or the second amount;
And a fourth determining module, configured to determine, according to the third number and the fourth number, a DCI size budget for the scheduling serving cell.
In a fifth aspect, there is also provided a communication device comprising:
And the alignment module is used for aligning the DCI carried on a dispatching service cell, wherein the dispatching service cell is a cell carrying the cross-carrier dispatching DCI of the dispatched cell and the self-dispatching DCI of the cell.
In a sixth aspect, there is also provided a communication device comprising:
a fifth determining module, configured to determine, when the UE configures the first CSS, a frequency domain resource location indicated by the DCI according to the active partial bandwidth; or determining the DCI size according to whether the UE is configured in the first CSS or not to detect the first DCI format;
wherein the first CSS is a CSS on PDCCH of type 3 of SCell and/or PCell;
the first DCI format refers to a DCI format of TPC signaling of PUCCH or PUSCH or SRS.
In a seventh aspect, there is also provided a communication device comprising: a processor, a memory, and a computer program stored on the memory and executable on the processor, which when executed by the processor, performs the steps of the method of determining DCI according to the first or second or third aspect.
In an eighth aspect, there is also provided a computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the method of determining DCI according to the first or second or third aspect.
In the embodiment of the invention, the DCI size budget can be determined in a CA scene, so that the UE can obtain the corresponding DCI size, and blind detection is carried out on the DCI format which is self-scheduled in the scheduling service cell and the DCI format which is cross-carrier scheduling.
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Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:
fig. 1 is a schematic diagram of cell self-scheduling;
Fig. 2 is a schematic diagram of cell cross-carrier scheduling;
Fig. 3 is a schematic diagram of a wireless communication system according to an embodiment of the present invention;
fig. 4 is a flowchart of determining downlink control information according to an embodiment of the present invention;
FIG. 5 is a second flowchart for determining downlink control information according to an embodiment of the present invention;
FIG. 6 is a third flowchart for determining downlink control information according to an embodiment of the present invention;
FIG. 7 is one of diagrams of a DCI size budget according to an embodiment of the present invention;
fig. 8 is a schematic diagram of self-scheduling and cross-carrier scheduling of cells according to an embodiment of the present invention;
FIG. 9 is a diagram illustrating a second DCI size budget according to an embodiment of the present invention;
fig. 10 is one of the structural diagrams of the communication device according to the embodiment of the present invention;
Fig. 11 is one of the structural diagrams of the communication device according to the embodiment of the present invention;
FIG. 12 is a second block diagram of a communication device according to an embodiment of the present invention;
fig. 13 is a third configuration diagram of a communication device according to an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus. Furthermore, the use of "and/or" in the specification and claims means at least one of the connected objects, e.g., a and/or B, meaning that it includes a single a, a single B, and that there are three cases of a and B.
In embodiments of the invention, words such as "exemplary" or "such as" are used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" or "e.g." in an embodiment should not be taken as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present related concepts in a concrete fashion.
Embodiments of the present invention are described below with reference to the accompanying drawings. The method and the device for determining the downlink control information provided by the embodiment of the invention can be applied to a wireless communication system. The wireless communication system may be a Fifth generation communication technology (5G) system, or an evolved long term evolution (Evolved Long Term Evolution, eLTE) system, or a subsequent evolved communication system. Referring to fig. 3, an architecture diagram of a wireless communication system according to an embodiment of the present invention is provided.
As shown in fig. 3, the wireless communication system may include: the network side device 30 and the user equipment, e.g. user equipment denoted UE31, UE31 may be in communication with the network side device 30. In practical application, the connection between the devices may be wireless connection, and for convenience and intuitionistic representation of the connection relationship between the devices, a solid line is used for illustration in fig. 3.
It should be noted that the communication system may include a plurality of UEs, and the network-side device may communicate (transmit signaling or transmit data) with the plurality of UEs.
The network side device 30 provided in the embodiment of the present invention may be a base station, which may be a commonly used base station, an evolved node b (evolved node base station, eNB), or a network side device in a 5G system (for example, a next generation base station (next generation node base station, gNB) or a transmitting and receiving point (transmission and reception point, TRP)) or a cell device.
The user equipment provided by the embodiment of the invention can be a mobile phone, a tablet Personal computer, a notebook computer, an Ultra-Mobile Personal Computer (UMPC), a netbook or a Personal digital assistant (Personal DIGITAL ASSISTANT, PDA) and the like.
As shown in fig. 4, a flowchart of a method for determining DCI according to an embodiment of the present invention is shown, where an execution body of the method is a communication device, and the communication device may be a UE or a network side device, and the specific steps are as follows:
Step 401: determining a first number of scells or a second number of scells scheduled across carriers;
In the embodiment of the present invention, the first number is used to represent the number of scells configured by the network side device.
Step 402: determining a third quantity of DCI size budget of self-scheduling of a scheduling service cell, wherein the scheduling service cell is a cell bearing cross-carrier scheduling DCI of a scheduled cell and self-scheduling DCI of a cell;
In an embodiment of the present invention, an SCell configured for cross-carrier scheduling may be referred to as a scheduling serving cell.
Step 403: determining a fourth number of DCI size budgets for the increased scheduling serving cell according to the first number or the second number;
in step 403, a fourth number of DCI size budgets for the increased scheduling serving cell is determined from the first number as follows:
Mode one: determining a fifth amount of DCI size budget for a scheduling serving cell that is correspondingly increased each time one SCell is increased; determining a fourth quantity of the DCI size budget for the increased scheduling serving cell according to the first quantity and the fifth quantity, i.e. the fourth quantity is the product of the first quantity and the fifth quantity;
Mode two: determining a first number threshold value of scells; determining a fourth number of DCI size budgets for the increased scheduling serving cell according to the first number and the first number threshold;
Specifically, determining a first number threshold value of scells, and then determining a fifth number of DCI size budgets of the scheduling serving cells which are correspondingly increased when one SCell is increased; when the first number is smaller than or equal to a first number threshold value, determining the product of the first number and the fifth number as a fourth number of the DCI size budget of the increased scheduling serving cell; when the first number is greater than the first number threshold value, a sixth number is determined as a fourth number of the DCI size budget for the increased scheduling serving cell, where the sixth number is less than a product of the first number and the fifth number.
In step 403, a fourth number of DCI size budgets for the increased scheduling serving cell is determined from the second number as follows:
Mode one: determining a seventh amount of DCI size budget for a scheduling serving cell that is correspondingly increased each time one cross-carrier scheduled SCell is increased; determining a fourth number of DCI size budgets for the increased scheduling serving cell according to the second number and the seventh number, i.e. the fourth number is the product of the second number and the seventh number;
Mode two: determining a second number threshold value of scells; a fourth number of DCI size budgets for the increased scheduling serving cell is determined based on the second number and the second number threshold.
Specifically, determining a second number threshold value of scells, and determining an eighth number of DCI size budgets of a scheduling serving cell which are correspondingly increased when each SCell which is scheduled by crossing carriers is increased; determining a product of the second number and the eighth number as a fourth number of the DCI size budget for the increased serving cell when the second number is less than or equal to a second number threshold; and when the second number is greater than a second number threshold value, determining a ninth number as a fourth number of the increased DCI size budget for the scheduling serving cell, wherein the ninth number is less than a product of the second number and the eighth number.
Step 404: and determining the DCI size budget of the scheduling service cell according to the third quantity and the fourth quantity.
That is, the DCI size budget for the scheduling serving cell is the sum of the third and fourth numbers.
To facilitate an understanding of the flow in fig. 4, the following description is provided in connection with specific examples, such as: the base station configures X SCell, X is more than or equal to 1, and a certain scheduling service cell (SERVING CELL) configures M SCell of cross-carrier scheduling, M is more than or equal to 1.SERVING CELL DCI size budget for single carrier scheduling or self-scheduling is a.
Mode one: adding X SCells, and adding DCI size budgets of a scheduling SERVING CELL carrying cross-carrier scheduling DCI:
i. for each SCell added, the DCI size budget of schedule SERVING CELL is increased by c, then the DCI size budget = a+c X of SERVING CELL carrying cross-carrier scheduled DCI;
DCI size budget increase for schedule SERVING CELL carrying cross-carrier schedule DCI is related to number threshold K of scells:
(1) When the number of scells X is less than or equal to K, the DCI size budget of the schedule SERVING CELL carrying the cross-carrier schedule DCI and the number of scells it schedules increase linearly, for example: DCI size budget = a+c X for schedule SERVING CELL carrying cross-carrier schedule DCI.
(2) When SCell number Y > K, DCI size budget=a+l, l < c×x for schedule SERVING CELL.
Mode two: adding M SCell of cross carrier scheduling, and adding DCI size budget of a scheduling SERVING CELL carrying DCI of cross carrier scheduling:
i. Every time one SCell of cross-carrier scheduling is added, the DCI size budget of the schedule SERVING CELL carrying the DCI of cross-carrier scheduling is increased by b, and the DCI size budget = a+b×M of the schedule SERVING CELL carrying the DCI of cross-carrier scheduling;
dci size budget increase is related to SCell number threshold N;
(1) When the number of scells M is N, the DCI size budget of the schedule SERVING CELL carrying the cross-carrier schedule DCI and the number of scells it schedules increase linearly, for example: DCI size budget = a+b×m for SERVING CELL carrying DCI scheduled across carriers.
(2) When the SCell number M > N, the DCI size budget=a+y, y < b×m of the schedule SERVING CELL carrying the DCI for cross-carrier scheduling.
In the embodiment of the invention, the DCI size budget can be determined in a CA scene, so that the UE can obtain the corresponding DCI size, and blind detection is carried out on the DCI format which is self-scheduled in the scheduling service cell and the DCI format which is cross-carrier scheduling.
As shown in fig. 5, a flowchart of a method for determining DCI according to an embodiment of the present invention may be a communication device, where the communication device is a UE or a network side device, and the specific steps are as follows:
step 501: aligning the DCI carried on a dispatching service cell, wherein the dispatching service cell is a cell carrying the cross-carrier dispatching DCI of a dispatched cell and the self-dispatching DCI of the cell.
Examples: the self-scheduling DCI size is aligned with the cross-carrier scheduling DCI size, or the cross-carrier scheduling DCI size is aligned with the cross-carrier scheduling DCI size, or the self-scheduling DCI size is aligned with the self-scheduling DCI size.
In the embodiment of the present invention, step 501 includes: any one of the first to fourth modes:
mode one: aligning the size of the back-off DCI carried in the USS of the scheduling serving cell with the size of the back-off DCI in the common search space CSS;
Mode two: aligning the size of self-scheduled non-fallback DCI carried in USS of a scheduling service cell with the size of cross-carrier scheduled non-fallback DCI, wherein the cross-carrier scheduled non-fallback DCI and the self-scheduled non-fallback DCI have the same DCI format;
In a second mode, aligning a non-fallback DCI size of cross-carrier scheduling with the same DCI format carried in USS of a scheduling serving cell to a self-scheduled non-fallback DCI size; or aligning the self-scheduled non-fallback DCI size and the cross-carrier scheduled non-fallback DCI size with the same DCI format in USS of the scheduling serving cell to the maximum DCI size.
Mode three: aligning the size of the DCI carried in the USS of the scheduling serving cell and the size of the DCI scheduled across carriers with each other, for example:
(1) Aligning the size of DCI which is carried in the USS of the scheduling service cell and scheduled by crossing carriers with the size of DCI which is scheduled by self-service through filling or shortening;
(2) Sorting all DCI sizes carried in a USS of a scheduling service cell, selecting Y DCI sizes according to the sequence from large to small, and aligning other DCI sizes with the nearest sorting respectively in a filling mode;
(3) Ordering all DCI sizes carried in the USS of the scheduling service cell, taking the largest DCI as a selection starting point, and aligning other DCI sizes with the latest ordering respectively in a filling mode according to the ordering sequence number (Y DCI sizes are selected (uniformly selected);
(4) Sorting all DCI sizes carried in the USS of the serving cell, taking the largest DCI size as a selection starting point, selecting (uniformly selecting) Y DCI sizes according to the DCI sizes, and aligning other DCI sizes with the latest sorting respectively in a filling mode;
where Y represents the DCI size budget in USS.
Mode four: firstly, aligning DCI according to a second mode, and then aligning DCI according to a third mode.
Aligning the size of the backspacing DCI in the USS of the service cell with the size of the backspacing DCI in the CSS, and aligning the size of the self-scheduled non-backspacing DCI with the same DCI format in the USS of the service cell with the size of the non-backspacing DCI scheduled across carriers;
Mode five: firstly, aligning DCI according to a third mode, and then aligning DCI according to a second mode.
Aligning the self-scheduled non-backspacing DCI size with the same DCI format in the USS of the service cell with the non-backspacing DCI size of the cross-carrier scheduling, and aligning the backspacing DCI size in the USS of the service cell with the backspacing DCI size in the CSS.
To facilitate an understanding of the flow in fig. 5, a description is given below in connection with a specific example.
DCI size alignment carried on the same cell includes: DCI size for self-scheduling and DCI size for cross-carrier scheduling:
mode one: DCI size alignment for self-scheduling in SERVING CELL:
The DCI format 0-0 or DCI format 1-0 (or called backoff DCI (fallback DCI)) size in USS is aligned with the DCI format 0-0 or DCI format/1-0 size in CSS.
Mode two: the DCI sizes within USS in SERVING CELL (including: self-scheduled non-fallback DCI size and cross-carrier scheduled non-fallback DCI size) are aligned:
the DCI sizes of the same DCI formats in USS are aligned.
A. The DCI size for cross-carrier scheduling is aligned with the DCI size for self-scheduling.
B. The DCI size of the same format DCI is aligned with the DCI size.
Mode three: the DCIs within the USSs in the schedule SERVING CELL (including the self-scheduled fallback DCI size and the non-fallback DCI and the cross-carrier scheduled non-fallback DCI) are aligned with each other.
A. The DCI size for cross-carrier scheduling is aligned to the DCI size for self-scheduling by padding (padding) or puncturing (truacate) the alignment.
B. ordering all DCI sizes in the USS, and if the DCI size budget in the USS is Y:
i. From the DCI size sorting sequence, Y DC sizes are selected from large to small, each selected DCI size is aligned with the DCI size closest to the sorting by filling, and the number of bits is more than or equal to 0.
And ii, uniformly selecting the sorting sequence number of the DCI size from the largest DCI size in the DCI size sorting sequence, aligning the DCI sizes of the selected sequence numbers, and selecting the DCI sizes with the smallest difference from each selected DCI size for filling.
And uniformly selecting DCI sizes from the maximum DCI sizes in the DCI size sorting sequence, aligning the selected DCI sizes, and selecting the DCI sizes with the smallest difference from each selected DCI size for filling.
Mode four: when the DCI size budget on schedule SERVING CELL is insufficient, the alignment order of its DCI sizes may be:
a) Firstly, aligning DCI according to a second mode, and aligning DCI according to a first mode.
B) Firstly, aligning DCI according to a first mode, and then aligning DCI according to a second mode.
The embodiment of the invention can lead the UE or the network side equipment to support the alignment of the DCI size in the scheduled cell and the DCI size of the scheduling cell so as to meet the DCI size budget and reduce the complexity of UE realization.
As shown in fig. 6, a flowchart of a method for determining DCI according to an embodiment of the present invention is shown, where an execution body of the method is a communication device, and the communication device may be a UE or a network side device, and the specific steps are as follows:
Step 601: when the UE is configured with the first CSS, determining the frequency domain resource position indicated by DCI according to the activated partial bandwidth; or determining the DCI size according to whether the UE is configured in the first CSS or not to detect the first DCI format;
wherein the first CSS is a CSS on PDCCH of type 3 of SCell and/or PCell;
the first DCI format refers to a DCI format of TPC signaling of a PUCCH or a Physical Uplink shared channel (Physical Uplink SHARED CHANNEL, PUSCH) or a Sounding reference signal (Sounding REFERENCE SIGNAL, SRS).
Optionally, in an embodiment of the present invention, when the UE is not configured to detect the first DCI format in the first CSS, determining, according to the activation portion bandwidth, a size of the fallback DCI format in the CSS or USS on the SCell.
Optionally, in an embodiment of the present invention, when the UE is configured to detect the first DCI format in the first CSS, the size of the fallback DCI format in the CSS or USS on the SCell is determined according to a default partial bandwidth (default BWP) or a first partial bandwidth (first BWP).
When the network side device needs to be described, the network side device may also determine, according to the activation partial bandwidth, a starting position of a frequency domain resource of a fallback DCI format in a CSS or USS on the SCell and a length of the frequency domain resource, or determine, according to a default partial bandwidth or a first partial bandwidth, a starting position of a frequency domain resource of a fallback DCI format in a CSS or USS on the SCell and a length of the frequency domain resource.
In the embodiment of the invention, the size of the DCI format is determined according to the active part bandwidth, so that the flexibility of the scheduling bandwidth is improved.
Example 1:
the DCI size budget of the UE in one slot on the PCell is 4, and the information of the SCell is scheduled across carriers on the PCell.
If 7 scells are configured, the DCI size budget for the PCell increases by 4 per SCell increase, and the DCI size budget for the pcell=4+4×7=32, see fig. 7.
Example 2:
the DCI size budget of the UE in one slot on the PCell is 4, and the information of the SCell is scheduled across carriers on the PCell.
When the number of scells configuring cross-carrier scheduling is greater than 4, the DCI size budget increases non-linearly. The number of increases is smaller than in the case of linear growth.
When the base station configures 2 scells for the UE, the base station increases the DCI size budget of a cell (PCell) carrying cross-carrier scheduling DCI by 2 sizes per configured SCell. The DCI size budget for a UE on PCell is 4+2×2=8.
When the base station configures 7 scells for the UE, the UE on the PCell may increase the DCI size of 4 scells to 2×4=8 DCI sizes at most. The DCI size budget of a UE within one slot is 4+8=12, see fig. 8 and 9.
Example 3:
The base station configures an SCell for the UE, and the PCell carries DCI for SCell cross-carrier scheduling. When the DCI size budget is insufficient, the DCI sizes carried on the same cell are aligned, including: self-scheduling DCI size alignment and cross-carrier scheduled DCI size alignment:
(1) The DCI size of DCI format 0-0 or DCI format 1-0 in USS in PCell is aligned with the DCI size of DCI format 0-0 or DCI format 1-0 in CSS.
(2) If the DCI size budget is still insufficient, aligning the fallback DCI size in USS:
a) DCI sizes of DCI formats 0_1 of self-scheduling and cross-carrier scheduling in the USS are aligned;
b) DCI sizes of DCI formats 1_1 of self-scheduled and cross-carrier scheduled in USS are aligned.
Example 4:
The base station configures an SCell for the UE, and the PCell carries DCI for SCell cross-carrier scheduling. When the DCI size budget is insufficient, the DCI sizes carried on the same cell are aligned, including: self-scheduling DCI size alignment and cross-carrier scheduled DCI size alignment:
(1) Alignment of non-fallback DCI sizes in USS:
a) DCI sizes of DCI formats 0_1 of self-scheduling and cross-carrier scheduling in the USS are aligned;
b) DCI sizes of DCI formats 1_1 of self-scheduled and cross-carrier scheduled in USS are aligned.
(2) If the DCI size budget is still insufficient, the DCI format 0-0 or the DCI format1-0 in the USS in the PCell is aligned with the DCI format 0-0 or the DCI format1-0 in the CSS.
Example 5:
The base station configures an SCell for the UE, and the PCell carries DCI for SCell cross-carrier scheduling. When the DCI size budget is insufficient, DCI size alignment carried on the same cell includes self-scheduled DCI size alignment and cross-carrier scheduled DCI size alignment. Ordering all DCI sizes (if 11) in USS from large to small, if the DCI size budget in USS is 6:
6 DCI sizes with sequence numbers 1,3,5,7,9, 11 are selected from the 11 DCI sizes.
The 2 nd DCI size is aligned with the 1 st DCI size by padding;
the 4 th DCI size is aligned with the 3 rd DCI size by padding;
the 6 th DCI size is aligned with the 5 th DCI size by padding;
The 8 th DCI size is aligned with the 7 th DCI size by padding;
the 10 th DCI size is aligned with the 9 th DCI size by padding;
and the UE determines the DCI size according to the DCI size rule and blindly detects the DCI format.
Example 6:
The base station configures an SCell for the UE, and the PCell carries DCI for SCell cross-carrier scheduling. When the DCI size budget is insufficient, the DCI size carried on the same cell is aligned, including: DCI size alignment for self-scheduling and DCI size alignment for cross-carrier scheduling.
Ordering all DCI sizes (7 if) in USS from big to small according to DCI sizes, and if the DCI size budget in USS is 3:
if all DCI sizes in USS are ordered as: 100, 81, 63, 62, 61, 60, 59;
The maximum difference deta =ceil [ (100-59)/(3-1) ]=20 according to the DCI size;
The first DCI size a1=100 selected;
The second DCI size a2=80 (100-20), a2=81;
The third DCI size a3=60 is selected to be equal to (80-20) =60, and a3=60.
DCI sizes 63, 62, 61 are aligned by padding to the nearest DCI size a2=81;
DCI size 59 is aligned with the nearest DCI size a3=60 by padding.
Example 7:
the base station configures an SCell, configures DCI (DCI format 0-0/1-0) for detecting C-RNTI and/or CS-RNTI scrambling in CSS for UE, takes the lowest PRB (physical resource indicator) of activated BWP, namely PRB0, as a reference point, and calculates a starting position S and a length L according to a DCI Resource Indication Value (RIV). And the UE finds the frequency domain resource according to the reference point, the starting position S and the length L.
The base station does not configure the UE to detect DCI format 2-2 and/or DCI format 2-3 (i.e. TPC signaling) in the type 3 CSS:
And determining frequency domain resource allocation according to the bandwidth of the active BWP and the RIV value of the frequency domain resource allocation domain in DCI format 0-0 or DCI format 1-0 on the SCell, and acquiring the starting position S and the length L of the frequency domain resource.
And determining frequency domain resource allocation according to the bandwidth of the active BWP and the RIV value of the frequency domain resource allocation domain in DCI format 0-0 or DCI format 1-0 on the SCell, and acquiring the starting position S and the length L of the frequency domain resource.
Example 8:
The base station configures an SCell, configures DCI (DCI format 0-0 or DCI format 1-0) for detecting C-RNTI and/or CS-RNTI scrambling in CSS for UE, takes the lowest PRB (physical resource block) of activated BWP, namely PRB0, as a reference point, and calculates a starting position S and a length L according to a DCI Resource Indication Value (RIV). And the UE finds the frequency domain resource according to the reference point, the starting position S and the length L.
The base station configures the UE to detect DCI format 2-2 and/or DCI format 2-3 (i.e. TPC signaling) in the type 3 CSS:
and (3) translating frequency domain resource allocation according to the bandwidth of the default BWP and the RIV value of the frequency domain resource allocation domain in DCS 0-0/1-0 on the SCell, and acquiring the starting position S and the length L of the frequency domain resource.
DCI format 0-0/1-0 in USS on SCell, according to aligning DCI format 0-0/1-0 in CSS.
DCI format 2-2 or DCI format 2-3 (TPC signaling) on the SCell aligns with DCI format 0-0 or DCI format 1-0 (fallback DCI) in the CSS.
The embodiment of the invention also provides a communication device, and because the principle of solving the problem of the communication device is similar to that of the method for determining the DCI in the embodiment of the invention, the implementation of the communication device can be referred to the implementation of the method, and the repetition is not repeated.
As shown in fig. 10, which is a schematic structural diagram of a communication device according to an embodiment of the present invention, the communication device 1000 includes:
A first determining module 1001, configured to determine a first number of secondary cell scells or a second number of scells scheduled across carriers;
A second determining module 1002, configured to determine a third amount of DCI size budget for self-scheduling of a scheduling serving cell, where the scheduling serving cell is a cell carrying DCI for cross-carrier scheduling of a scheduled cell and self-scheduling DCI of a own cell;
A third determining module 1003, configured to determine, according to the first number or the second number, a fourth number of DCI size budgets of the scheduling serving cell that is increased;
A fourth determining module 1004, configured to determine a DCI size budget for the scheduling serving cell according to the third number and the fourth number.
In an embodiment of the present invention, optionally, the third determining module 1003 is further configured to: determining a fifth amount of DCI size budget for the scheduling serving cell that corresponds to the increase per one SCell increase; determining a fourth number of DCI size budgets for the scheduling serving cell to be increased according to the first number and the fifth number; or determining a first number threshold value of the SCell; and determining a fourth quantity of the DCI size budget of the increased dispatching service cell according to the first quantity and the first quantity threshold value.
In an embodiment of the present invention, optionally, the third determining module 1003 is further configured to: determining a fifth amount of DCI size budget for the scheduling serving cell that corresponds to the increase per one SCell increase; determining a product of the first number and the fifth number as a fourth number of the increased DCI size budget for the scheduling serving cell when the first number is less than or equal to the first number threshold; when the first number is greater than the first number threshold value, determining a sixth number as a fourth number of increased DCI size budgets of the scheduling serving cell.
In an embodiment of the present invention, optionally, the third determining module 1003 is further configured to: determining a seventh amount of DCI size budget for the scheduling serving cell that is correspondingly increased each time one cross-carrier scheduled SCell is increased; determining a fourth number of DCI size budgets for the scheduling serving cell that are increased according to the second number and the seventh number; or determining a second number of threshold values for the SCell; and determining a fourth quantity of the DCI size budget of the increased dispatching service cell according to the second quantity and the second quantity threshold value.
In an embodiment of the present invention, optionally, the third determining module 1003 is further configured to: determining an eighth amount of DCI size budget for the scheduling serving cell that is correspondingly increased each time one cross-carrier scheduled SCell is increased; determining a product of the second number and the eighth number as a fourth number of the increased DCI size budget for the scheduling serving cell when the second number is less than or equal to the second number threshold; when the second number is greater than the second number threshold value, determining a ninth number as a fourth number of increasing DCI size budgets of the serving cell, wherein the ninth number is less than a product of the second number and the eighth number.
The communication device provided in the embodiment of the present invention may execute the above method embodiment, and its implementation principle and technical effects are similar, and this embodiment will not be described herein.
The embodiment of the invention also provides a communication device which can be a UE or a network side device, and because the principle of solving the problem of the communication device is similar to that of the method for determining DCI in the embodiment of the invention, the implementation of the communication device can refer to the implementation of the method, and the repetition is omitted.
As shown in fig. 11, which is a schematic structural diagram of a communication device according to an embodiment of the present invention, the communication device 1100 includes:
An alignment module 1101, configured to align the size of DCI carried on a scheduling serving cell, where the scheduling serving cell is a cell carrying DCI scheduled by a cross carrier of a scheduled cell and self-scheduled DCI of a own cell.
In an embodiment of the present invention, optionally, the alignment module 1101 is further configured to:
Aligning the size of the back-off DCI in the UE specific search space USS of the scheduling serving cell with the size of the back-off DCI in the common search space CSS; or alternatively
Aligning the size of self-scheduled non-fallback DCI carried in USS of a scheduling service cell with the size of cross-carrier scheduled non-fallback DCI, wherein the cross-carrier scheduled non-fallback DCI and the self-scheduled non-fallback DCI have the same DCI format; or alternatively
Aligning the size of the backspacing DCI carried in the USS of the scheduling service cell with the size of the backspacing DCI in the CSS, and aligning the size of the self-scheduled non-backspacing DCI carried in the USS of the scheduling service cell with the size of the cross-carrier scheduled non-backspacing DCI, wherein the cross-carrier scheduled non-backspacing DCI and the self-scheduled non-backspacing DCI have the same DCI format; or alternatively
Aligning the self-scheduled non-backspace DCI size in USS of the scheduling service cell with the cross-carrier scheduled non-backspace DCI size, and aligning the backspace DCI size in USS of the scheduling service cell with the backspace DCI size in CSS, wherein the cross-carrier scheduled non-backspace DCI and the self-scheduled non-backspace DCI have the same DCI format.
In an embodiment of the present invention, optionally, the alignment module 1101 is further configured to: and aligning the self-scheduled DCI size and the cross-carrier scheduled DCI size carried in the USS of the scheduling service cell.
In an embodiment of the present invention, optionally, the alignment module 1101 is further configured to:
aligning the DCI size of cross-carrier scheduling in USS carried in a scheduling service cell with the DCI size of self-scheduling in a filling or puncturing mode;
Or alternatively
Sorting all DCI sizes carried in a USS of a scheduling service cell, selecting Y DCI sizes according to the order of the DCI sizes from large to small, and aligning other DCI sizes with the nearest sorting respectively in a filling mode;
Or alternatively
Ordering all DCI sizes carried in the USS of the scheduling service cell, taking the largest DCI size as a selection starting point, selecting Y DCI sizes according to the ordering sequence number, and aligning other DCI sizes with the nearest ordering respectively in a filling mode;
Or alternatively
Ordering all DCI sizes carried in the USS of the service cell, taking the largest DCI size as a selection starting point, selecting Y DCI sizes according to the DCI sizes, and aligning other DCI sizes with the nearest ordering respectively in a filling mode;
where Y represents the number of DCI size budgets in USS.
The communication device provided in the embodiment of the present invention may execute the above method embodiment, and its implementation principle and technical effects are similar, and this embodiment will not be described herein.
The embodiment of the invention also provides a communication device, and because the principle of solving the problem of the communication device is similar to that of the method for determining the DCI in the embodiment of the invention, the implementation of the communication device can be referred to the implementation of the method, and the repetition is not repeated.
As shown in fig. 12, which is a schematic structural diagram of a communication device according to an embodiment of the present invention, the communication device 1200 includes:
a fifth determining module 1201, configured to determine, when the UE configures the first CSS, a frequency domain resource location indicated by DCI according to the active part bandwidth; or determining the DCI size according to whether the UE is configured in the first CSS or not to detect the first DCI format;
wherein the first CSS is a CSS on PDCCH of type 3 of SCell and/or PCell;
the first DCI format refers to a DCI format of TPC signaling of PUCCH or PUSCH or SRS.
In an embodiment of the present invention, optionally, the fifth determining module 1201 is further configured to: when the UE is not configured to detect the first DCI format in the first CSS, determining a size of the fallback DCI format in the CSS or USS on the SCell according to the active part bandwidth.
In an embodiment of the present invention, optionally, the fifth determining module 1201 is further configured to: when the UE is configured to detect a first DCI format in the first CSS, determining a size of a fallback DCI format in a CSS or USS on the SCell according to a default partial bandwidth or a first partial bandwidth.
The UE provided in the embodiment of the present invention may execute the above method embodiment, and its implementation principle and technical effects are similar, and this embodiment will not be described herein.
Referring to fig. 13, another communication device 1300 is provided according to an embodiment of the present invention, comprising: processor 1301, transceiver 1302, memory 1303, user interface 1304, and bus interface.
Processor 1301 may be responsible for managing the bus architecture and general processing, among other things. The memory 1303 may store data used by the processor 1301 in performing operations.
In an embodiment of the present invention, the communication device 1300 may further include: a computer program stored on the memory 1303 and executable on the processor 1301, which when executed by the processor 1301 enables determining a first number of secondary cell scells or a second number of cross-carrier scheduled scells; determining a third quantity of DCI size budget of self-scheduling of a scheduling service cell, wherein the scheduling service cell is a cell bearing cross-carrier scheduling DCI of a scheduled cell and self-scheduling DCI of a cell; determining a fourth number of DCI size budgets for the scheduling serving cell to be increased according to the first number or the second number; and determining the DCI size budget of the scheduling service cell according to the third quantity and the fourth quantity.
In another embodiment of the present invention, the communication device 1300 may further include: a computer program stored on the memory 1303 and executable on the processor 1301, which when executed by the processor 1301 implements: aligning the DCI carried on a dispatching service cell, wherein the dispatching service cell is a cell carrying the cross-carrier dispatching DCI of a dispatched cell and the self-dispatching DCI of the cell.
In another embodiment of the present invention, the communication device 1300 may further include: a computer program stored on the memory 1303 and executable on the processor 1301, which when executed by the processor 1301 implements: when the UE is configured with a first CSS, determining a frequency domain resource position indicated by DCI according to the activated partial bandwidth; or determining the DCI size according to whether the UE is configured in the first CSS or not to detect the first DCI format; wherein the first CSS is a CSS on PDCCH of type 3 of SCell and/or PCell; the first DCI format refers to a DCI format of TPC signaling of PUCCH or PUSCH or SRS.
In fig. 13, a bus architecture may comprise any number of interconnected buses and bridges, with one or more processors, represented by processor 1301, and various circuits of memory, represented by memory 1303, linked together. The bus architecture may also link together various other circuits such as peripheral devices, voltage regulators, power management circuits, etc., all as are well known in the art and, therefore, further description of embodiments of the present invention will not be provided. The bus interface provides an interface. The transceiver 1302 may be a number of elements, i.e., including a transmitter and a receiver, providing a means for communicating with various other apparatus over a transmission medium.
The steps of a method or algorithm described in connection with the present disclosure may be embodied in hardware, or may be embodied in software instructions executed by a processor. The software instructions may be comprised of corresponding software modules that may be stored in RAM, flash memory, ROM, EPROM, EEPROM, registers, hard disk, a removable disk, a read-only optical disk, or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. In the alternative, the storage medium may be integral to the processor. The processor and the storage medium may reside in an ASIC. In addition, the ASIC may be located in a core network interface device. The processor and the storage medium may reside as discrete components in a core network interface device.
Those skilled in the art will appreciate that in one or more of the examples described above, the functions described in the present invention may be implemented in hardware, software, firmware, or any combination thereof. When implemented in software, these functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media may be any available media that can be accessed by a general purpose or special purpose computer.
The foregoing embodiments have been provided for the purpose of illustrating the general principles of the present invention in further detail, and are not to be construed as limiting the scope of the invention, but are merely intended to cover any modifications, equivalents, improvements, etc. based on the teachings of the invention.
It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, embodiments of the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, embodiments of the invention may take the form of a computer program product on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.
Embodiments of the present invention are described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the 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 modifications and variations can be made to the embodiments of the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the embodiments of the present invention fall within the scope of the claims and the equivalents thereof, the present invention is also intended to include such modifications and variations.
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| Publication number | Publication date |
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| CN114157397A (en) | 2022-03-08 |
| CN110475356B (en) | 2021-12-28 |
| CN110475356A (en) | 2019-11-19 |
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