CN116456491A - Downlink control information communication method and related equipment - Google Patents
Downlink control information communication method and related equipment Download PDFInfo
- Publication number
- CN116456491A CN116456491A CN202310311778.3A CN202310311778A CN116456491A CN 116456491 A CN116456491 A CN 116456491A CN 202310311778 A CN202310311778 A CN 202310311778A CN 116456491 A CN116456491 A CN 116456491A
- Authority
- CN
- China
- Prior art keywords
- bwp
- field
- dci
- control information
- downlink control
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000004891 communication Methods 0.000 title claims abstract description 20
- 238000004590 computer program Methods 0.000 claims description 5
- 230000011664 signaling Effects 0.000 description 4
- 239000002699 waste material Substances 0.000 description 4
- 230000009849 deactivation Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000003993 interaction Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000013468 resource allocation Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
- H04W72/232—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal the control data signalling from the physical layer, e.g. DCI signalling
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/06—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0457—Variable allocation of band or rate
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The application provides a downlink control information communication method and related equipment, wherein the method comprises the following steps: when the BWP switching condition is met, carrying a first field in Downlink Control Information (DCI) issued to the terminal equipment, wherein the first field is used for indicating whether the DCI carries a BWP indicator or not, and the size of the first field is 1bit; when BWP switching is required, the first field is made to be a first value, and a BWP indicator is carried in the downlink DCI; when the BWP switch is not needed, the first field is set to be the second value, and the BWP indicator is not carried in the downlink DCI. By the method, the BWP indicator can be carried in the DCI only when the BWP is required to be switched, and the BWP indicator is not carried when the BWP is not required to be switched, so that the downlink control information resource overhead is saved.
Description
Technical Field
The present invention relates to 5G NR communication technologies, and in particular, to a downlink control information communication method and related devices.
Background
Downlink control information (Downlink control information, abbreviated DCI) is used to provide information such as uplink and downlink physical layer resource allocation, power control commands, and HARQ of the wireless network for the terminal.
In the case of configuring a plurality of BWP (BandwidthPart) scenarios, only one BWP is active in the up/down direction at a particular time, and then a way to select one particular BWP as the active BWP is required.
The BWP may be selected in the following manner:
1. the ID of the activated BWP is indicated by a BWP indicator, i.e. field [ Bandwidth part indicator ], of DCI1_1 or DCI 0_1.
2. The BWP deactivation time is configured by the BWP deactivation timer BWP-inactivatetimer, and after the deactivation time is timed out, the BWP switch is completed.
3. The current active BWP is indicated through RRC signaling.
4. And selecting in an initial access process.
The inventors found that in mode 1, even when BWP switching is not performed, this field needs to be provided in DCI1_1 or DCI 0_1. The field size is determined by the number of BWP configured by the system, and occupies 2 bits at most, while the [ Bandwidth part indicator ] fields in DCI1_1 and DCI0_1 are meaningless and waste air interface resources when no BWP reselection is performed.
Disclosure of Invention
The invention aims to provide a downlink control information communication method and related equipment, so that waste of air interface resources is reduced, and the cost of the downlink control information is saved.
The following presents a simplified summary of one or more aspects in order to provide a basic understanding of such aspects. This summary is not an extensive overview of all contemplated aspects, and is intended to neither identify key or critical elements of all aspects nor delineate the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form as a prelude to the more detailed description that is presented later.
According to an aspect of the present invention, there is provided a downlink control information communication method, performed by a base station, including:
when the BWP switching condition is met, carrying a first field in Downlink Control Information (DCI) issued to the terminal equipment, wherein the first field is used for indicating whether the DCI carries a BWP indicator or not, and the size of the first field is 1bit;
when BWP switching is required, the first field is made to be a first value, and a BWP indicator is carried in the downlink DCI;
when the BWP switch is not needed, the first field is set to be the second value, and the BWP indicator is not carried in the downlink DCI.
In some embodiments, the method further comprises: and when the BWP switching condition is not met, the first field is not carried in the DCI issued to the terminal equipment.
In some embodiments, the BWP switching condition is: the base station is configured with a plurality of BWP and the terminal device supports BWP handover.
In some embodiments, the method further comprises: judging whether the terminal equipment supports BWP switching or not in advance according to capability information reported by the terminal; if the received capability information element reported by the terminal does not contain the second field, the terminal equipment is determined not to support BWP switching;
and if the received capability information element reported by the terminal contains a second field, the terminal equipment is determined to support BWP switching.
According to a second aspect of the present invention, there is provided a base station comprising: a memory, a processor and a computer program stored on the memory and executable on the processor, which when executed by the processor, implements the downlink control information communication method as described in the first aspect.
According to a third aspect of the present invention, there is provided a downlink control information communication method, which is executed by a terminal device, and receives DCI from a base station, and when a first field carried by the DCI is read, determines whether to read a BWP indicator according to a value of the first field;
when the value of the first field is the first value, reading a BWP indicator carried in the DCI, and determining BWP according to the BWP indicator;
when the value of the first field is the second value, the first field is ignored.
In some embodiments, when accessing the base station, if the terminal device supports BWP handover, the second field is carried in the reported terminal capability information element.
According to a fourth aspect of the present invention, there is provided a terminal device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the computer program implementing the downlink control information communication method according to the third aspect when executed by the processor.
The embodiment of the invention has the beneficial effects that: when the BWP switching condition is met, the BWP indicator is carried in the DCI only when the BWP needs to be switched, and is not carried when the BWP does not need to be switched, thereby saving downlink control information resource overhead. In addition, by adding the first field to the DCI to indicate whether the DCI carries the BWP indicator, since the first field occupies only 1bit and most of the scenes are non-switched BWP scenes, the downlink control information resource overhead can be reduced in most cases.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
The above features and advantages of the present invention will be better understood after reading the detailed description of embodiments of the present disclosure in conjunction with the following drawings. In the drawings, the components are not necessarily to scale and components having similar related features or characteristics may have the same or similar reference numerals.
FIG. 1 is a flow chart of a method according to an embodiment of the present application
Fig. 2 is a signaling interaction diagram when BWP handover conditions are met;
fig. 3 is a signaling interaction diagram when a base station configures non-multi-BWP;
fig. 4 is a signaling interaction diagram when the device does not support BWP.
Detailed Description
The invention is described in detail below with reference to the drawings and the specific embodiments. It is noted that the aspects described below in connection with the drawings and the specific embodiments are merely exemplary and should not be construed as limiting the scope of the invention in any way.
The embodiment of the application provides a downlink control information communication method, which has the core concept that the change of BWP selection is carried [ Bandwidth part indicator ] field indication only when BWP selection is carried out through DCI, so that air interface waste is reduced.
Specifically, as shown in fig. 1 and 2, the method includes the steps of:
the base station determines whether the BWP switching condition is met, and when the BWP switching condition is met, the downlink control information DCI (dci0_1 and dci1_1) issued to the terminal device carries a first field (for example, may be named as "bwpexst") which is used for indicating whether the DCI carries the BWP indicator, and the size of the first field is 1bit.
In other words, the size of the first field may be 0 or 1bit, when the BWP switching condition is satisfied, the size of the first field is 1bit, and when the BWP switching condition is not satisfied, the size of the first field is 0.
On the basis of meeting the BWP switching condition, further judging whether BWP switching exists.
When BWP switching is required, the first field is set to a first value, for example, the value of [ bwpexst ] is set to 1. Meanwhile, a BWP indicator, i.e., [ Bandwidth part indicator ] field, definition and use of [ Bandwidth part indicator ] field are specified with reference to the existing protocol, is carried in the downlink DCI.
When BWP switching is not required, the first field is set to the second value, for example, the value of [ bwpexst ] is set to 0. Meanwhile, no BWP indicator is carried in the downlink DCI.
After receiving the DCI from the base station, the terminal equipment judges whether to read the BWP indicator according to the value of the first field (bwpexst) when reading the first field carried by the DCI; when the value of [ bwpexst ] is 1, reading a BWP indicator carried in DCI, and determining BWP according to the BWP indicator; when the value of [ bwpexst ] is 0, the first field is ignored.
The savings for PDCCH overhead are calculated as follows:
considering first the size of [ Bandwidth part indicator ], the number of bits of this field itself is determined according to the BWP number, and when the base station does not have a multi BWP configuration, [ Bandwidth part indicator ] is 0bit. When the BWP configuration of the base station is equal to or less than 2, the [ Bandwidth part indicator ] is 1bit. When the BWP configuration of the base station is > 2, [ Bandwidth part indicator ] is 2 bits.
After the method is adopted, when BWP configuration of the base station is more than 2 and BWP switching is not needed, 1bit can be saved because only the [ bwpexst ] field of 1bit is needed to be carried and the [ Bandwidth part indicator ] field is not needed to be carried. When BWP configuration is less than or equal to 2 and BWP switching is not needed, the 1bit [ bwpexst ] field is carried and the [ Bandwidth part indicator ] field is not carried, compared with the prior art, the method has no saving.
While the first field may occupy 1bit when BWP handover is required, the BWP configuration > 2 of the base station is more than the BWP handover, so that the air interface waste can be reduced.
Further, when it is determined that the BWP switching condition is not met, the first field and the BWP indicator are not carried in the DCI issued to the terminal device by the base station, i.e., neither the [ bwpexst ] field nor the [ Bandwidth part indicator ] field is included in the DCI.
The BWP switching conditions are: the base station is configured with a plurality of BWP and the terminal device supports BWP handover. If the base station is not configured with a plurality of BWP or the terminal device does not support BWP handover, the first field and the BWP indicator are not carried in the DCI, as shown in fig. 3 and 4.
The number of BWP configured by the base station may be acquired by the base station itself, and the terminal device needs to acquire from the terminal device if the terminal device can support BWP handover. Therefore, the method also adds a second field in the capability information element reported by the terminal, for example, the second field can be named as [ bwp-switching support variable ], the field is an optional field, and the value of the field is [ ENUMERATED { supported } ]. When the field is not carried, it indicates that the terminal does not support BWP switching, so that the base station can determine whether the terminal device supports BWP switching in advance according to the capability information reported by the terminal. If the received capability information element reported by the terminal does not contain the second field, the terminal equipment is determined not to support BWP switching; if the second field is included in the capability information element reported by the received terminal, the terminal equipment is determined to support BWP switching.
It is easy to understand that the embodiment of the present application further provides a base station and a terminal device, so as to cooperatively implement the above downlink control information communication method. The hardware structures of the base station and the terminal device are the same as the existing structure, and the corresponding configuration is performed on the software, which is not repeated here.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other.
The previous description of the disclosure is provided to enable any person skilled in the art to make or use the disclosure. Various modifications to the disclosure will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other variations without departing from the spirit or scope of the disclosure. Thus, the disclosure is not intended to be limited to the examples and designs described herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
The foregoing description is of the preferred embodiment of the present application and is not intended to limit the invention to the particular form disclosed, but on the contrary, the intention is to cover all modifications, equivalents, alternatives, and alternatives falling within the spirit and scope of the invention.
Claims (8)
1. A downlink control information communication method performed by a base station, comprising:
when the BWP switching condition is met, carrying a first field in Downlink Control Information (DCI) issued to the terminal equipment, wherein the first field is used for indicating whether the DCI carries a BWP indicator or not, and the size of the first field is 1bit;
when BWP switching is required, the first field is made to be a first value, and a BWP indicator is carried in the downlink DCI;
when the BWP switch is not needed, the first field is set to be the second value, and the BWP indicator is not carried in the downlink DCI.
2. The downlink control information communication method according to claim 1, wherein: and when the BWP switching condition is not met, the first field and the BWP indicator are not carried in the DCI issued to the terminal equipment.
3. The downlink control information communication method according to claim 1 or 2, wherein the BWP switching condition is: the base station is configured with a plurality of BWP and the terminal device supports BWP handover.
4. The downlink control information communication method according to claim 3, further comprising: judging whether the terminal equipment supports BWP switching or not in advance according to capability information reported by the terminal;
if the received capability information element reported by the terminal does not contain the second field, the terminal equipment is determined not to support BWP switching;
and if the received capability information element reported by the terminal contains a second field, the terminal equipment is determined to support BWP switching.
5. A base station, comprising: memory, a processor and a computer program stored on the memory and executable on the processor, which when executed by the processor, implements the downlink control information communication method according to any one of claims 1 to 4.
6. A downlink control information communication method, performed by a terminal device, characterized in that: receiving DCI from a base station, and judging whether to read a BWP indicator according to the value of a first field when the first field carried by the DCI is read;
when the value of the first field is the first value, reading a BWP indicator carried in the DCI, and determining BWP according to the BWP indicator;
when the value of the first field is the second value, the first field is ignored.
7. The downlink control information communication method according to claim 6, wherein: when accessing to the base station, if the terminal equipment supports BWP switching, the reported terminal capability information element carries a second field.
8. A terminal device, comprising: memory, a processor and a computer program stored on the memory and executable on the processor, which when executed by the processor, implements the downlink control information communication method according to any one of claims 6 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310311778.3A CN116456491B (en) | 2023-03-28 | 2023-03-28 | Downlink control information communication method and related equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310311778.3A CN116456491B (en) | 2023-03-28 | 2023-03-28 | Downlink control information communication method and related equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116456491A true CN116456491A (en) | 2023-07-18 |
| CN116456491B CN116456491B (en) | 2024-06-07 |
Family
ID=87121185
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310311778.3A Active CN116456491B (en) | 2023-03-28 | 2023-03-28 | Downlink control information communication method and related equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116456491B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109788563A (en) * | 2017-11-15 | 2019-05-21 | 维沃移动通信有限公司 | BWP indicating means, acquisition methods, network side equipment and user terminal |
| CN109803415A (en) * | 2017-11-17 | 2019-05-24 | 华为技术有限公司 | A kind of bandwidth indicating means, the network equipment and terminal device |
| CN110831198A (en) * | 2018-08-10 | 2020-02-21 | 华为技术有限公司 | Bandwidth resource switching method, indication bandwidth resource switching method, terminal and network equipment |
| CN111727579A (en) * | 2018-02-16 | 2020-09-29 | 高通股份有限公司 | Downlink control information signaling scheme for bandwidth partial handover |
| CN112153725A (en) * | 2019-06-28 | 2020-12-29 | 华为技术有限公司 | Wireless communication method, device and system |
| CN113455081A (en) * | 2019-01-11 | 2021-09-28 | 株式会社Ntt都科摩 | User terminal and wireless communication method |
| US20220201518A1 (en) * | 2020-12-17 | 2022-06-23 | Electronics And Telecommunications Research Institute | Measurement management method for mobile communication, and apparatus therefor |
-
2023
- 2023-03-28 CN CN202310311778.3A patent/CN116456491B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109788563A (en) * | 2017-11-15 | 2019-05-21 | 维沃移动通信有限公司 | BWP indicating means, acquisition methods, network side equipment and user terminal |
| CN109803415A (en) * | 2017-11-17 | 2019-05-24 | 华为技术有限公司 | A kind of bandwidth indicating means, the network equipment and terminal device |
| CN111727579A (en) * | 2018-02-16 | 2020-09-29 | 高通股份有限公司 | Downlink control information signaling scheme for bandwidth partial handover |
| CN110831198A (en) * | 2018-08-10 | 2020-02-21 | 华为技术有限公司 | Bandwidth resource switching method, indication bandwidth resource switching method, terminal and network equipment |
| CN113455081A (en) * | 2019-01-11 | 2021-09-28 | 株式会社Ntt都科摩 | User terminal and wireless communication method |
| CN112153725A (en) * | 2019-06-28 | 2020-12-29 | 华为技术有限公司 | Wireless communication method, device and system |
| US20220201518A1 (en) * | 2020-12-17 | 2022-06-23 | Electronics And Telecommunications Research Institute | Measurement management method for mobile communication, and apparatus therefor |
Non-Patent Citations (2)
| Title |
|---|
| 3GPP: ""draft-r2-21yxxxx_email_005_phase2_v02_huawei"", 3GPP TSG_RAN\\WG2_RL2, 15 April 2021 (2021-04-15) * |
| 黄陈横: "5G BWP关键技术及应用研究", 邮电设计技术, 31 December 2022 (2022-12-31) * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN116456491B (en) | 2024-06-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR102624306B1 (en) | Resource selection method and terminal device | |
| JP5380552B2 (en) | Random access resource selection method and terminal | |
| KR102424636B1 (en) | Channel resource indication method, terminal device and network device | |
| CN111818604B (en) | Method, equipment and system for switching wave beams | |
| US11284347B2 (en) | Activation system information transmission method, apparatus, and device | |
| CN110741612B (en) | Configuration method of scheduling request, network equipment and terminal equipment | |
| WO2021031888A1 (en) | Monitoring method and device for pdcch | |
| EP3621399B1 (en) | Method and device for sending random access response message, method and device for receiving random access response message | |
| CN111294898B (en) | User terminal, state switching method thereof, computer-readable storage medium and base station | |
| CN113271683A (en) | Method for communication based on UE capability, UE and network side equipment | |
| CN110235475A (en) | Process by demand method, user equipment and base station | |
| TWI433567B (en) | Method and apparatus for providing a paging process for multicarrier | |
| CN111869268A (en) | Information configuration method, device, equipment and readable storage medium | |
| CN113993173B (en) | Dynamic carrier switching method, device, base station and storage medium | |
| JP2019521539A (en) | Signal transmission method, network equipment and terminal equipment | |
| US20230284126A1 (en) | Barring factors in wireless communications systems | |
| CN116456491B (en) | Downlink control information communication method and related equipment | |
| KR20220164523A (en) | Time domain resource determination method and device, terminal device | |
| CN113115239B (en) | Information indication method, device, system, equipment and storage medium | |
| US11785667B2 (en) | Discontinuous reception in internet of things applications | |
| CN107295614B (en) | Control channel detection method, and method and device for reporting TTI length | |
| CN115913500A (en) | Method and device for determining PDCCH monitoring adaptive behavior | |
| KR20220137975A (en) | Method and apparatus for determining CPU occupancy time for multiple PDCCH repeated transmission scenarios, storage medium and terminal | |
| CN106559901A (en) | A kind of recognition methodss and terminal | |
| KR102502560B1 (en) | Cell selection method, broadcast message transmission method, terminal and network device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant |