CN111436125A - A method, device and signaling for sending uplink control information - Google Patents

Abstract

The present application discloses a method, device and signaling for sending uplink control information. The method includes the following steps: receiving configuration information, where the configuration information includes a PUCCH start symbol position, and the start symbol position is more than one; Continuously monitor the channel at the above-mentioned starting symbol position, and select an idle starting symbol position to send the PUCCH. The signaling includes the PUCCH start symbol position. The embodiment of the present application further proposes a device that receives the configuration information, continuously monitors the channel at the start symbol position, and selects an idle start symbol position to send the PUCCH. The embodiment of the present application further proposes a device that sends the configuration information and receives the PUCCH at the start symbol position. The solution of the present application can improve the reliability of PUCCH transmission in the unlicensed frequency band under the condition that the PUCCH transmission opportunity caused by the interference of other systems in the unlicensed frequency band is reduced.

Description

A method, device and signaling for sending uplink control information

technical field

The present application relates to the field of mobile communication technologies, and in particular, to a method and device for sending uplink control information.

Background technique

5G has become the latest generation of mobile communication technology, and an important application is the use of unlicensed frequency bands. In unlicensed bands, the coexistence of various wireless systems needs to be considered. Typical unlicensed band applications include Wifi, LTE-based LAA technology, etc. In order to allow multiple technologies to coexist, regulatory agencies in various countries adopt the mandatory listen-before-transmit (LBT) technique for the use of unlicensed frequency bands, that is, data transmission can only be performed when it is detected that the current channel is not occupied. The problem with this mechanism is that some data is not guaranteed to be sent in a certain location. If the existing 5G new radio interface design (NR) is directly used in the unlicensed frequency band, the performance can hardly be guaranteed. Especially when the 5G NR-based design is independently deployed in the unlicensed frequency band, since the feedback information cannot be guaranteed to be sent at a fixed time, the system performance will be greatly reduced when the business is busy.

According to the use of 5G NR in unlicensed frequency bands, its design needs to support multiple scenarios, especially in unlicensed frequency bands, it needs to be deployed independently. In order to support independent deployment in the unlicensed frequency band, the terminal equipment (UE) needs to transmit the uplink control channel (PUCCH) in the unlicensed frequency band. According to the current standard, the transmission of PUCCH needs to be configured by a network device (gNB), and then the terminal sends corresponding uplink control information according to the PUCCH resources configured by the gNB.

According to the current standard, the PUCCH configuration configured by the gNB has a fixed transmission position. Since data transmission in the unlicensed frequency band needs to meet the requirements of LBT, once the PUCCH cannot be transmitted due to the indicated time due to LBT, the data transmission of the UE in the unlicensed frequency band will be greatly affected. The present invention provides a PUCCH configuration method. In this way, the number of resources available for a PUCCH configuration can be increased, the robustness of the PUCCH can be improved, and the performance of NR in the unlicensed frequency band can be improved.

SUMMARY OF THE INVENTION

The present application proposes a method, device and signaling for sending uplink control information, aiming to solve the problem of low reliability of sending PUCCH in an unlicensed frequency band in the prior art.

An embodiment of the present application proposes a method for sending uplink control information, which is used for a terminal device, and includes the following steps:

receiving configuration information, where the configuration information includes a PUCCH start symbol position, and the start symbol position is more than one;

The channel is continuously monitored at the start symbol position, and an idle start symbol position is selected to transmit the PUCCH.

Preferably, in the configuration information, at least one PUCCH format includes more than one start symbol position.

Preferably, the starting symbol position is represented in at least one of the following ways:

Start symbol start position, start symbol quantity value;

Start symbol start position, start symbol end position;

Discrete start symbol positions.

Preferably, the configuration information further includes a time slot indication. Further, the time slot indication is expressed as: the number of time slots.

Further preferably, in the method described in the embodiment of the present application, before sending the PUCCH, the following step is further included: receiving PUCCH resource indication information, where the resource indication information includes PUCCH resource configuration parameters. Optionally, the PUCCH resource indication information is included in downlink control signaling or higher layer signaling.

The embodiment of the present application further provides signaling, which is used for the method described in any one of the embodiments of the present application, and includes the following configuration information: PUCCH start symbol position.

An embodiment of the present application further provides a device, which is used in the method described in any one of the embodiments of the present application to receive the configuration information, continuously monitor the channel at the start symbol position, and select an idle start symbol position to send the PUCCH.

An embodiment of the present application further provides a device, which is used in the method described in any one of the embodiments of the present application to send the configuration information and receive the PUCCH at the start symbol position.

The above-mentioned at least one technical solution adopted in the embodiments of the present application can achieve the following beneficial effects:

In the present invention, the number of possible start symbols in the PUCCH transmission format (Format) configuration is increased, so that the PUCCH resource configuration supports multiple PUCCH candidate transmission time points. The UE obtains PUCCH resources supporting multiple PUCCH candidate transmission time points according to the gNB configuration. The UE selects one PUCCH for transmission according to the PUCCH resources and multiple candidate time points. Based on this method, PUCCH transmission opportunities can be increased, and the robustness of PUCCH transmission can be increased.

With the method and device provided by the present invention, the gNB provides the UE with multiple PUCCH transmission opportunities, and can improve the reliability of PUCCH transmission in the unlicensed frequency band when the PUCCH transmission opportunities in the unlicensed frequency band are reduced due to interference from other systems.

Description of drawings

The drawings described herein are used to provide further understanding of the present application and constitute a part of the present application. The schematic embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation of the present application. In the attached image:

1 is a schematic diagram of PUCCH resource configuration parameters;

2 is a schematic diagram of the configuration information of the starting symbol position in the PUCCH format configuration;

3 is a schematic diagram of the configuration information including the starting position of the start symbol and the number value of the start symbol;

Fig. 4 is a schematic diagram of the configuration information comprising the starting position of the starting symbol and the ending position of the starting symbol;

5 is a schematic diagram of configuration information including discrete start symbol positions;

6 is a schematic diagram of configuration information including time slot indication;

FIG. 7 is a flowchart of an embodiment of the method of the present invention used for dynamic PUCCH feedback of terminal equipment;

FIG. 8 is a flowchart of an embodiment of the method of the present invention used for dynamic PUCCH feedback of a network device;

9 is a flowchart of an embodiment of the method of the present invention for semi-static PUCCH feedback of a terminal device;

FIG. 10 is a flowchart of an embodiment of the method of the present invention used for semi-static PUCCH feedback of a network device.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be clearly and completely described below with reference to the specific embodiments of the present application and the corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

According to the current NR protocol, the basic process of UE sending PUCCH is as follows:

The gNB informs the UE that the PUCCH transmission resources are available;

The UE determines the content, format and transmission position of the PUCCH according to the type and size of the transmission information, combined with the PUCCH transmission resources configured by the gNB, and then transmits the PUCCH;

The gNB performs PUCCH detection and reception at the configured PUCCH resources.

According to the current standard solution, the PUCCH transmission resource configuration notified by the gNB to the UE only contains one transmission time point. Due to the coexistence of other systems in the unlicensed frequency band, there is a situation where the configuration time point is interfered and the PUCCH cannot be sent.

In order to improve the robustness of PUCCH transmission, the present invention provides a configuration method of PUCCH in an unlicensed frequency band.

The technical solutions provided by the embodiments of the present application will be described in detail below with reference to the accompanying drawings.

FIG. 1 is a schematic diagram of PUCCH resource configuration parameters. According to the current standard TS38.331, the transmission of the PUCCH needs to be configured according to the gNB, and the specific configuration parameter of the PUCCH resource is PUCCH-Resource. The PUCCH-Resource configuration includes information (format) such as a configuration label (pucch-ResourceId), a frequency starting position (startingPRB), whether frequency hopping is adopted, and a PUCCH format. The specific configuration is shown in FIG. 1 .

FIG. 2 is a schematic diagram of configuration information of start symbol positions in PUCCH format configuration. The figure includes starting symbol indications (startingSymbolIndex) in different PUCCH format (PUCCH-format0-4) configurations. Since only one initial transmission symbol is supported in the configuration information shown. If there is interference from other systems, the configured initial transmission symbol cannot initiate PUCCH transmission, resulting in the situation that the PUCCH bearer information cannot be fed back.

In the present invention, in the PUCCH resource configuration in which the gNB is the UE, multiple indications of starting symbol positions are added to each PUCCH format (PUCCH-format). Increase the number of candidate start symbols so that the PUCCH resource configuration supports multiple PUCCH candidate transmission time points. The UE selects one for transmission according to the PUCCH resource and multiple candidate transmission time points.

The start symbol position is expressed in at least one of the following ways:

Mode 1: start symbol start position, start symbol quantity value;

Mode 2: start symbol start position, start symbol end position;

Mode 3: Discrete start symbol positions.

Mode 4: On the basis of modes 1 to 3, the time slot indication is further added.

FIG. 3 is a schematic diagram of configuration information including the starting position of the start symbol and the number value of the start symbol. Specifically, Mode 1: Use the start position of the start symbol and the value of the number of start symbols to indicate the number of consecutive symbols that can be used as the start symbol after the start symbol. The starting symbol quantity value (StartSymbolduration) marked in bold font is the quantity that can be used as the starting symbol in a row after the starting position (startingSymbolIndex) of the starting symbol. For example, StartSymbolduration=3 means starting from startingSymbolIndex, and the following three symbols can also be used as starting symbols of PUCCH.

FIG. 4 is a schematic diagram of configuration information including the start position of the start symbol and the end position of the start symbol. Specifically, mode 2: use the start position of the start symbol to indicate the maximum range of the PUCCH start symbol. The starting symbol ending position (endingSymbolIndex) marked in bold font is the latest ending symbol of PUCCH. That is, the symbols between the start position of the start symbol and the end position of the start symbol can be used for PUCCH transmission. If the endingSymbolIndex is 10, it means that the PUCCH can be sent from the startingSymbolIndex to the 10th symbol.

FIG. 5 is a schematic diagram of configuration information including discrete start symbol positions. Specifically, Mode 3: Use discrete start symbol positions. Indicates multiple PUCCH start symbols, and identifies each symbol in the form of a bit set. For example, the candidate start symbol index (candidateStartSymbolIndex) marked in bold font is a set of multiple possible start symbols. For example, 14 bits are used to respectively indicate whether 14 symbols can be used as start symbols.

FIG. 6 is a schematic diagram of configuration information including time slot indication. Preferably, the configuration information further includes a time slot indication. Further, the time slot indication is expressed as: the number of time slots. Specifically, mode 4: when multiple possible start symbol positions are indicated at the same time, multiple possible start time slots are indicated. Wherein, the indication manner of the multiple possible start symbols may be one of the above three manners, and the indication of the multiple start time slots is a separate indication. For example, start symbol position indication is performed in mode 1, and time slot indication is added at the same time. The value of the number of slots (slotDuration) in FIG. 6 indicates that a plurality of possible start symbols in the slotDuration time slots after the time slot in which the PUCCH can start to transmit can be used to start the PUCCH transmission.

FIG. 7 is a flowchart of an embodiment of the method of the present invention used for dynamic PUCCH feedback of a terminal device.

An embodiment of the present application proposes a method for sending uplink control information, which is used for a terminal device, and includes the following steps:

Step 11. The terminal device receives configuration information, where the configuration information includes a PUCCH start symbol position, and the start symbol position is more than one;

For example, the UE receives the configuration information including the PUCCH-Resource sent by the gNB for the UE to send the PUCCH.

For example, the gNB sends multiple PUCCH-Resource sets through high-layer RRC signaling, and each PUCCH-Resource set has multiple PUCCH-Resource configurations (eg, FIG. 1 ). Through this signaling, the UE can obtain multiple PUCCH-Resource configurations, and each configuration has multiple possible initial transmission symbols of the PUCCH through the method of the present invention (eg, FIGS. 3-6 ). When each time slot contains 14 symbols, a maximum of 14 starting symbol positions can be defined in the time slot.

Step 12: Receive PUCCH resource indication information, where the resource indication information includes PUCCH resource configuration parameters, and the PUCCH resource indication information is included in downlink control signaling;

For example, the UE receives the downlink control channel (PDCCH), and determines the time slot information for PUCCH transmission and the specific PUCCH transmission configuration through PDSCH-to-HARQ-timing-indicator and PUCCH resource indicator in the PDCCH.

The PDSCH-to-HARQ-timing-indicator is used to instruct the UE to perform PUCCH transmission in several time slots after receiving the PDCCH; the PUCCH resource indicator specifically indicates which one to use for the PUCCH in the multiple PUCCH-Resource configurations as shown in Figure 1 send. After a PUCCH configuration is determined, according to step 11, the UE obtains the PUCCH transmission format and multiple candidate positions that can be used for PUCCH transmission.

Step 13: Continuously monitor the channel at the start symbol position, and select an idle start symbol position to send the PUCCH.

For example, the UE selects a location to actually transmit the PUCCH according to multiple transmittable locations. The UE prepares corresponding PUCCH transmission data according to the multiple PUCCH candidate positions determined in step 12 . At the candidate positions, the UE performs channel monitoring in chronological order. If the monitoring result is that the channel is not occupied and the PUCCH can be sent, the UE sends the PUCCH. If the channel monitoring result is that the channel is occupied, no PUCCH transmission is performed.

For example, when the UE obtains the candidate positions of the transmittable PUCCH according to the PUCCH-Resource indication, the 0th to 5th symbols are. Then, the UE prepares the 0th to 5th symbols to send PUCCH data according to the indicated format. At the same time, the UE performs continuous monitoring (LBT) of the channel, starting from symbol 0. Once the channel is idle, data transmission can be performed, and the UE performs PUCCH transmission of the corresponding symbol.

FIG. 8 is a flowchart of an embodiment of the method of the present invention used for dynamic PUCCH feedback of a network device.

Corresponding to the embodiment shown in FIG. 7 , the working process embodiment on the network device (gNB) side includes the following steps:

Step 21, the network device sends configuration information, the configuration information includes the PUCCH start symbol position, and the start symbol position is more than one;

For example, the gNB performs PUCCH related configuration for the UE through high-layer signaling (such as RRC signaling), including various PUCCH-Resource configurations;

Step 22, the network device sends downlink control signaling, which includes PUCCH resource indication information; for example, gNB sends downlink control information including PUCCH feedback time slot and configuration indication field;

Step 23: The network device receives the PUCCH information at the multiple candidate start symbol positions indicated by the PDCCH.

FIG. 9 is a flowchart of an embodiment of the method of the present invention used for semi-static PUCCH feedback of a terminal device.

An embodiment of the present application proposes a method for sending uplink control information, which is used for a terminal device, and includes the following steps:

Step 31, the terminal device receives configuration information, where the configuration information includes the PUCCH start symbol position, and the start symbol position is more than one;

In step 31, the UE receives the PUCCH transmission configuration including the PUCCH-Resource sent by the gNB.

For example, the gNB sends multiple PUCCH-Resource configurations to the UE through high-layer RRC signaling. Through this signaling, the UE can obtain multiple PUCCH-Resource configurations, and each configuration has multiple possible initial transmission symbols of the PUCCH through the method of the present invention.

Step 32: Receive PUCCH resource indication information, where the resource indication information includes PUCCH resource configuration parameters, and the PUCCH resource indication information is included in higher layer signaling.

For example, the UE receives semi-static PUCCH feedback signaling. The signaling type is such as CSI-ReportConfig. The signaling includes related information PUCCH-CSI-Resource and CSI-ReportPeriodicityAndOffset sent by PUCCH.

The CSI-ReportPeriodicityAndOffset is used to indicate the position of the PUCCH feedback time slot; the PUCCH-CSI-Resource specifically indicates which one of the multiple PUCCH-Resource configurations is specifically used for PUCCH transmission. After a PUCCH configuration is determined, according to step 31, the UE obtains the PUCCH transmission format and multiple candidate positions that can be used for PUCCH transmission.

It should be noted that, if multiple possible time slot indications configured in mode 4 are encountered at this time, the multi-slot PUCCH transmission in mode 4 is not performed, and PUCCH transmission is only performed according to the period indicated by CSI-ReportPeriodicityAndOffset.

Step 33: Continuously monitor the channel at the start symbol position, and select an idle start symbol position to send the PUCCH.

In step 33, the UE selects a location to actually transmit the PUCCH according to multiple transmittable locations. The UE prepares corresponding PUCCH transmission data according to the multiple PUCCH candidate positions determined in step 32 . At the candidate positions, the UE performs channel monitoring in chronological order. If the monitoring result is that the channel is not occupied, the UE performs PUCCH transmission. If the channel monitoring result is that the channel is occupied, no PUCCH transmission is performed.

FIG. 10 is a flowchart of an embodiment of the method of the present invention used for semi-static PUCCH feedback of a network device. Corresponding to the embodiment shown in FIG. 9 , the network device embodiment includes the following steps:

Step 41, the network device sends configuration information, the configuration information includes the PUCCH start symbol position, and the start symbol position is more than one;

For example, the gNB performs PUCCH related configuration for the UE through higher layer signaling (RRC signaling), including various PUCCH-Resource configurations;

Step 42, the network device sends high-level signaling, which includes PUCCH resource indication information;

For example, gNB sends semi-static configuration information including PUCCH feedback slot and configuration indication field;

Step 43: The network device receives the PUCCH information at the positions of the multiple candidate start symbols indicated by the high layer signaling.

In order to implement the present application, an embodiment of the present application further proposes a signaling for use in the method described in any one of the embodiments of the present application, including the following configuration information: a PUCCH start symbol position.

Preferably, in the configuration information, at least one PUCCH format includes more than one start symbol position.

Preferably, the starting symbol position is represented in at least one of the following ways, for example:

Start symbol start position, start symbol quantity value;

Start symbol start position, start symbol end position;

Discrete start symbol positions.

Preferably, the configuration information further includes a time slot indication. Further, the time slot indication is expressed as: the number of time slots.

An embodiment of the present application further proposes a device for use in the method described in any one of the embodiments of the present application, where the device is a terminal device, configured to receive the configuration information, and continuously monitor the channel at the start symbol position, Select an idle start symbol position to send the PUCCH.

An embodiment of the present application further provides a device for use in the method described in any one of the embodiments of the present application, where the device is a network device, configured to send the configuration information, and receive the PUCCH at the start symbol position.

With the method and device of the present invention, PUCCH related configuration is performed for the UE through high-layer signaling (eg, RRC signaling). Various PUCCH-Resource configurations are included. The gNB sends information (PDCCH or higher layer signaling) including the PUCCH feedback time slot and the configuration indication field. PUCCH information is received on multiple candidate PUCCH transmission points indicated by the PDCCH.

As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, 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, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.

The present invention is 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 in 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 the processor of a general purpose computer, special purpose computer, embedded processor or other programmable data processing device to produce a machine such that the instructions executed by the processor of the computer or other programmable data processing device produce Means for implementing the functions specified in a flow or flow of a flowchart and/or a block or blocks of a block diagram.

It should also be noted that the terms "comprising", "comprising" or any other variation thereof are intended to encompass a non-exclusive inclusion such that a process, method, article or device comprising a series of elements includes not only those elements, but also Other elements not expressly listed, or which are inherent to such a process, method, article of manufacture, or apparatus are also included. Without further limitation, an element qualified by the phrase "comprising a..." does not preclude the presence of additional identical elements in the process, method, article of manufacture, or device that includes the element.

The above descriptions are merely examples of the present application, and are not intended to limit the present application. Various modifications and variations of this application are possible for those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included within the scope of the claims of this application.

Claims (10)

1. An uplink control information sending method is used for terminal equipment, and is characterized by comprising the following steps:

receiving configuration information, wherein the configuration information comprises PUCCH starting symbol positions, and the starting symbol positions are more than 1;

and continuously monitoring the channel at the starting symbol position, and selecting an idle starting symbol position to transmit the PUCCH.

2. The method of claim 1, wherein at least 1 PUCCH format contains more than 1 starting symbol position in the configuration information.

3. The method of claim 1, wherein the starting symbol position is expressed in at least one of:

starting symbol starting position, starting symbol quantity value;

a start symbol start position, a start symbol end position;

discrete start symbol positions.

4. The method of claim 1, wherein the configuration information further includes a slot indication.

5. The method of claim 4, wherein the slot indication is expressed as: the slot number value.

6. The method according to any of claims 1 to 5, further comprising, before transmitting the PUCCH, the steps of:

and receiving PUCCH resource indication information, wherein the resource indication information comprises PUCCH resource configuration parameters.

7. The method of claim 6, wherein the PUCCH resource indication information is included in downlink control signaling or higher layer signaling.

8. A signaling for the method of any one of claims 1 to 7, characterized by comprising the following configuration information: PUCCH start symbol position.

9. An apparatus configured to perform the method according to any one of claims 1 to 7, wherein the apparatus receives the configuration information, performs continuous listening on a channel at the start symbol position, and selects an idle start symbol position to transmit the PUCCH.

10. An apparatus configured to perform the method according to any one of claims 1 to 7, wherein the apparatus transmits the configuration information and receives the PUCCH at the starting symbol position.

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